====================
This patch set fixes bug in btf_dedup_is_equiv() check mishandling equivalence
comparison between VOID kind in candidate type graph versus anonymous non-VOID
kind in canonical type graph.
Patch #1 fixes bug, by comparing candidate and canonical kinds for equality,
before proceeding to kind-specific checks.
Patch #2 adds a test case testing this specific scenario.
====================
Andrii Nakryiko [Wed, 27 Mar 2019 05:00:07 +0000 (22:00 -0700)]
selftests/bpf: add btf_dedup test for VOID equivalence check
This patch adds specific test exposing bug in btf_dedup_is_equiv() when
comparing candidate VOID type to a non-VOID canonical type. It's
important for canonical type to be anonymous, otherwise name equality
check will do the right thing and will exit early.
Andrii Nakryiko [Wed, 27 Mar 2019 05:00:06 +0000 (22:00 -0700)]
libbpf: fix btf_dedup equivalence check handling of different kinds
btf_dedup_is_equiv() used to compare btf_type->info fields, before doing
kind-specific equivalence check. This comparsion implicitly verified
that candidate and canonical types are of the same kind. With enum fwd
resolution logic this check couldn't be done generically anymore, as for
enums info contains vlen, which differs between enum fwd and
fully-defined enum, so this check was subsumed by kind-specific
equivalence checks.
This change caused btf_dedup_is_equiv() to let through VOID vs other
types check to reach switch, which was never meant to be handing VOID
kind, as VOID kind is always pre-resolved to itself and is only
equivalent to itself, which is checked early in btf_dedup_is_equiv().
This change adds back BTF kind equality check in place of more generic
btf_type->info check, still defering further kind-specific checks to
a per-kind switch.
Section 2.2.1 BTF_KIND_INT a bullet list was collapsed due to
text reflow in commit 9ab5305dbe3f ("docs/btf: reflow text to
fill up to 78 characters").
This patch correct the mistake. Also adjust next bullet list,
which is used for comparison, to get rendered the same way.
Fixes: 9ab5305dbe3f ("docs/btf: reflow text to fill up to 78 characters") Link: https://www.kernel.org/doc/html/latest/bpf/btf.html#btf-kind-int Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
====================
The BPF verifier checks the maximum number of call stack frames twice,
first in the main CFG traversal (do_check) and then in a subsequent
traversal (check_max_stack_depth). If the second check fails, it logs a
'verifier bug' warning and errors out, as the number of call stack frames
should have been verified already.
However, the second check may fail without indicating a verifier bug: if
the excessive function calls reside in dead code, the main CFG traversal
may not visit them; the subsequent traversal visits all instructions,
including dead code.
This case raises the question of how invalid dead code should be treated.
The first patch implements the conservative option and rejects such code;
the second adds a test case.
====================
Paul Chaignon [Wed, 20 Mar 2019 12:58:27 +0000 (13:58 +0100)]
bpf: remove incorrect 'verifier bug' warning
The BPF verifier checks the maximum number of call stack frames twice,
first in the main CFG traversal (do_check) and then in a subsequent
traversal (check_max_stack_depth). If the second check fails, it logs a
'verifier bug' warning and errors out, as the number of call stack frames
should have been verified already.
However, the second check may fail without indicating a verifier bug: if
the excessive function calls reside in dead code, the main CFG traversal
may not visit them; the subsequent traversal visits all instructions,
including dead code.
This case raises the question of how invalid dead code should be treated.
This patch implements the conservative option and rejects such code.
Signed-off-by: Paul Chaignon <paul.chaignon@orange.com> Tested-by: Xiao Han <xiao.han@orange.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Daniel Borkmann [Mon, 25 Mar 2019 14:54:43 +0000 (15:54 +0100)]
bpf: fix use after free in bpf_evict_inode
syzkaller was able to generate the following UAF in bpf:
BUG: KASAN: use-after-free in lookup_last fs/namei.c:2269 [inline]
BUG: KASAN: use-after-free in path_lookupat.isra.43+0x9f8/0xc00 fs/namei.c:2318
Read of size 1 at addr ffff8801c4865c47 by task syz-executor2/9423
In this scenario path lookup under RCU is racing with the final
unlink in case of symlinks. As Linus puts it in his analysis:
[...] We actually RCU-delay the inode freeing itself, but
when we do the final iput(), the "evict()" function is called
synchronously. Now, the simple fix would seem to just RCU-delay
the kfree() of the symlink data in bpf_evict_inode(). Maybe
that's the right thing to do. [...]
Al suggested to piggy-back on the ->destroy_inode() callback in
order to implement RCU deferral there which can then kfree() the
inode->i_link eventually right before putting inode back into
inode cache. By reusing free_inode_nonrcu() from there we can
avoid the need for our own inode cache and just reuse generic
one as we currently do.
And in-fact on top of all this we should just get rid of the
bpf_evict_inode() entirely. This means truncate_inode_pages_final()
and clear_inode() will then simply be called by the fs core via
evict(). Dropping the reference should really only be done when
inode is unhashed and nothing reachable anymore, so it's better
also moved into the final ->destroy_inode() callback.
Fixes: 0f98621bef5d ("bpf, inode: add support for symlinks and fix mtime/ctime") Reported-by: syzbot+fb731ca573367b7f6564@syzkaller.appspotmail.com Reported-by: syzbot+a13e5ead792d6df37818@syzkaller.appspotmail.com Reported-by: syzbot+7a8ba368b47fdefca61e@syzkaller.appspotmail.com Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Analyzed-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Link: https://lore.kernel.org/lkml/0000000000006946d2057bbd0eef@google.com/T/
Daniel Borkmann [Sat, 23 Mar 2019 00:49:11 +0000 (01:49 +0100)]
bpf, libbpf: clarify bump in libbpf version info
The current documentation suggests that we would need to bump the
libbpf version on every change. Lets clarify this a bit more and
reflect what we do today in practice, that is, bumping it once per
development cycle.
Fixes: 76d1b894c515 ("libbpf: Document API and ABI conventions") Reported-by: Stanislav Fomichev <sdf@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Daniel Borkmann [Sat, 23 Mar 2019 00:49:10 +0000 (01:49 +0100)]
bpf, libbpf: fix version info and add it to shared object
Even though libbpf's versioning script for the linker (libbpf.map)
is pointing to 0.0.2, the BPF_EXTRAVERSION in the Makefile has
not been updated along with it and is therefore still on 0.0.1.
While fixing up, I also noticed that the generated shared object
versioning information is missing, typical convention is to have
a linker name (libbpf.so), soname (libbpf.so.0) and real name
(libbpf.so.0.0.2) for library management. This is based upon the
LIBBPF_VERSION as well.
The build will then produce the following bpf libraries:
# rm -rf /tmp/bld; mkdir /tmp/bld; make -j$(nproc) O=/tmp/bld install
Auto-detecting system features:
... libelf: [ on ]
... bpf: [ on ]
CC /tmp/bld/libbpf.o
CC /tmp/bld/bpf.o
CC /tmp/bld/nlattr.o
CC /tmp/bld/btf.o
CC /tmp/bld/libbpf_errno.o
CC /tmp/bld/str_error.o
CC /tmp/bld/netlink.o
CC /tmp/bld/bpf_prog_linfo.o
CC /tmp/bld/libbpf_probes.o
CC /tmp/bld/xsk.o
LD /tmp/bld/libbpf-in.o
LINK /tmp/bld/libbpf.a
LINK /tmp/bld/libbpf.so.0.0.2
LINK /tmp/bld/test_libbpf
INSTALL /tmp/bld/libbpf.a
INSTALL /tmp/bld/libbpf.so.0.0.2
Arnd Bergmann [Fri, 22 Mar 2019 14:18:43 +0000 (15:18 +0100)]
rxrpc: avoid clang -Wuninitialized warning
clang produces a false-positive warning as it fails to notice
that "lost = true" implies that "ret" is initialized:
net/rxrpc/output.c:402:6: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
if (lost)
^~~~
net/rxrpc/output.c:437:6: note: uninitialized use occurs here
if (ret >= 0) {
^~~
net/rxrpc/output.c:402:2: note: remove the 'if' if its condition is always false
if (lost)
^~~~~~~~~
net/rxrpc/output.c:339:9: note: initialize the variable 'ret' to silence this warning
int ret, opt;
^
= 0
Rearrange the code to make that more obvious and avoid the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jon Maloy [Fri, 22 Mar 2019 14:03:51 +0000 (15:03 +0100)]
tipc: tipc clang warning
When checking the code with clang -Wsometimes-uninitialized we get the
following warning:
if (!tipc_link_is_establishing(l)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/tipc/node.c:847:46: note: uninitialized use occurs here
tipc_bearer_xmit(n->net, bearer_id, &xmitq, maddr);
net/tipc/node.c:831:2: note: remove the 'if' if its condition is always
true
if (!tipc_link_is_establishing(l)) {
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
net/tipc/node.c:821:31: note: initialize the variable 'maddr' to silence
this warning
struct tipc_media_addr *maddr;
We fix this by initializing 'maddr' to NULL. For the matter of clarity,
we also test if 'xmitq' is non-empty before we use it and 'maddr'
further down in the function. It will never happen that 'xmitq' is non-
empty at the same time as 'maddr' is NULL, so this is a sufficient test.
Fixes: 598411d70f85 ("tipc: make resetting of links non-atomic") Reported-by: Nathan Chancellor <natechancellor@gmail.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
John Hurley [Fri, 22 Mar 2019 12:37:35 +0000 (12:37 +0000)]
net: sched: fix cleanup NULL pointer exception in act_mirr
A new mirred action is created by the tcf_mirred_init function. This
contains a list head struct which is inserted into a global list on
successful creation of a new action. However, after a creation, it is
still possible to error out and call the tcf_idr_release function. This,
in turn, calls the act_mirr cleanup function via __tcf_idr_release and
__tcf_action_put. This cleanup function tries to delete the list entry
which is as yet uninitialised, leading to a NULL pointer exception.
Fix this by initialising the list entry on creation of a new action.
Fixes: 4e232818bd32 ("net: sched: act_mirred: remove dependency on rtnl lock") Signed-off-by: John Hurley <john.hurley@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Fri, 22 Mar 2019 06:39:35 +0000 (07:39 +0100)]
r8169: fix cable re-plugging issue
Bartek reported that after few cable unplug/replug cycles suddenly
replug isn't detected any longer. His system uses a RTL8106, I wasn't
able to reproduce the issue with RTL8168g. According to his bisect
the referenced commit caused the regression. As Realtek doesn't
release datasheets or errata it's hard to say what's the actual root
cause, but this change was reported to fix the issue.
Fixes: 38caff5a445b ("r8169: handle all interrupt events in the hard irq handler") Reported-by: Bartosz Skrzypczak <barteks2x@gmail.com> Suggested-by: Bartosz Skrzypczak <barteks2x@gmail.com> Tested-by: Bartosz Skrzypczak <barteks2x@gmail.com> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wen Yang [Fri, 22 Mar 2019 03:04:09 +0000 (11:04 +0800)]
net: ethernet: ti: fix possible object reference leak
The call to of_get_child_by_name returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
./drivers/net/ethernet/ti/netcp_ethss.c:3661:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 3654, but without a corresponding object release within this function.
./drivers/net/ethernet/ti/netcp_ethss.c:3665:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 3654, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Wingman Kwok <w-kwok2@ti.com> Cc: Murali Karicheri <m-karicheri2@ti.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
Wen Yang [Fri, 22 Mar 2019 03:04:08 +0000 (11:04 +0800)]
net: ibm: fix possible object reference leak
The call to ehea_get_eth_dn returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
./drivers/net/ethernet/ibm/ehea/ehea_main.c:3163:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 3154, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Douglas Miller <dougmill@linux.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
Wen Yang [Fri, 22 Mar 2019 03:04:07 +0000 (11:04 +0800)]
net: xilinx: fix possible object reference leak
The call to of_parse_phandle returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.
Detected by coccinelle with the following warnings:
./drivers/net/ethernet/xilinx/xilinx_axienet_main.c:1624:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 1569, but without a corresponding object release within this function.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Cc: Anirudha Sarangi <anirudh@xilinx.com> Cc: John Linn <John.Linn@xilinx.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Michal Simek <michal.simek@xilinx.com> Cc: netdev@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
Florian Fainelli [Thu, 21 Mar 2019 23:34:44 +0000 (16:34 -0700)]
net: phy: Re-parent menus for MDIO bus drivers correctly
After 90eff9096c01 ("net: phy: Allow splitting MDIO bus/device support
from PHYs") the various MDIO bus drivers were no longer parented with
config PHYLIB but with config MDIO_BUS which is not a menuconfig, fix
this by depending on MDIO_DEVICE which is a menuconfig.
This is visually nicer and less confusing for users.
Fixes: 90eff9096c01 ("net: phy: Allow splitting MDIO bus/device support from PHYs") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit [Thu, 21 Mar 2019 20:23:14 +0000 (21:23 +0100)]
r8169: don't read interrupt mask register in interrupt handler
After the original patch network starts to crash on heavy load.
It's not fully clear why this additional register read has such side
effects, but removing it fixes the issue.
Thanks also to Alex for his contribution and hints.
Fixes: e782410ed237 ("r8169: improve spurious interrupt detection") Reported-by: VDR User <user.vdr@gmail.com> Tested-by: VDR User <user.vdr@gmail.com> Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski [Thu, 21 Mar 2019 21:34:36 +0000 (14:34 -0700)]
bpf: verifier: propagate liveness on all frames
Commit 7640ead93924 ("bpf: verifier: make sure callees don't prune
with caller differences") connected up parentage chains of all
frames of the stack. It didn't, however, ensure propagate_liveness()
propagates all liveness information along those chains.
This means pruning happening in the callee may generate explored
states with incomplete liveness for the chains in lower frames
of the stack.
The included selftest is similar to the prior one from commit 7640ead93924 ("bpf: verifier: make sure callees don't prune with
caller differences"), where callee would prune regardless of the
difference in r8 state.
Now we also initialize r9 to 0 or 1 based on a result from get_random().
r9 is never read so the walk with r9 = 0 gets pruned (correctly) after
the walk with r9 = 1 completes.
The selftest is so arranged that the pruning will happen in the
callee. Since callee does not propagate read marks of r8, the
explored state at the pruning point prior to the callee will
now ignore r8.
Propagate liveness on all frames of the stack when pruning.
Fixes: f4d7e40a5b71 ("bpf: introduce function calls (verification)") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Yunsheng Lin [Thu, 21 Mar 2019 03:28:43 +0000 (11:28 +0800)]
net: hns3: fix for not calculating tx bd num correctly
When there is only one byte in a frag, the current calculation
using "(size + HNS3_MAX_BD_SIZE - 1) >> HNS3_MAX_BD_SIZE_OFFSET"
will return zero, because HNS3_MAX_BD_SIZE is 65535 and
HNS3_MAX_BD_SIZE_OFFSET is 16. So it will cause tx error when
a frag's size is one byte.
This patch fixes it by using DIV_ROUND_UP.
Fixes: 3fe13ed95dd3 ("net: hns3: avoid mult + div op in critical data path") Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Herbert Xu [Thu, 21 Mar 2019 01:39:52 +0000 (09:39 +0800)]
rhashtable: Still do rehash when we get EEXIST
As it stands if a shrink is delayed because of an outstanding
rehash, we will go into a rescheduling loop without ever doing
the rehash.
This patch fixes this by still carrying out the rehash and then
rescheduling so that we can shrink after the completion of the
rehash should it still be necessary.
The return value of EEXIST captures this case and other cases
(e.g., another thread expanded/rehashed the table at the same
time) where we should still proceed with the rehash.
Fixes: da20420f83ea ("rhashtable: Add nested tables") Reported-by: Josh Elsasser <jelsasser@appneta.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Tested-by: Josh Elsasser <jelsasser@appneta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wang Hai [Wed, 20 Mar 2019 18:25:05 +0000 (14:25 -0400)]
net-sysfs: Fix memory leak in netdev_register_kobject
When registering struct net_device, it will call
register_netdevice ->
netdev_register_kobject ->
device_initialize(dev);
dev_set_name(dev, "%s", ndev->name)
device_add(dev)
register_queue_kobjects(ndev)
In netdev_register_kobject(), if device_add(dev) or
register_queue_kobjects(ndev) failed. Register_netdevice()
will return error, causing netdev_freemem(ndev) to be
called to free net_device, however put_device(&dev->dev)->..->
kobject_cleanup() won't be called, resulting in a memory leak.
Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id string array") Signed-off-by: Wang Hai <wanghai26@huawei.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
====================
net/sched: validate the control action with all the other parameters
currently, the kernel checks for bad values of the control action in
tcf_action_init_1(), after a successful call to the action's init()
function. When the control action is 'goto chain', this causes two
undesired behaviors:
1. "misconfigured action after replace that causes kernel crash":
if users replace a valid TC action with another one having invalid
control action, all the new configuration data (including the bad
control action) are applied successfully, even if the kernel returned
an error. As a consequence, it's possible to trigger a NULL pointer
dereference in the traffic path of every TC action (1), replacing the
control action with 'goto chain x', when chain <x> doesn't exist.
2. "refcount leak that makes kmemleak complain"
when a valid 'goto chain' action is overwritten with another action,
the kernel forgets to decrease refcounts in the chain.
The above problems can be fixed if we validate the control action in each
action's init() function, the same way as we are already doing for all the
other configuration parameters.
Now that chains can be released after an action is replaced, we need to
care about concurrent access of 'goto_chain' pointer: ensure we access it
through RCU, like we did with most action-specific configuration parameters.
- Patch 1 removes the wrong checks and provides functions that can be
used to properly validate control actions in individual actions
- Patch 2 to 16 fix individual actions, and add TDC selftest code to
verify the correct behavior (2)
- Patch 17 and 18 fix concurrent access issues on 'goto_chain', that can be
observed after the chain refcount leak is fixed.
Changes since v1:
- reword the cover letter
- condense the extack message in case tc_action_check_ctrlact() is called
with invalid parameters.
- add tcf_action_set_ctrlact() to avoid code duplication an make the
RCU-ification of 'goto_chain' easier.
- fix errors in act_ife, act_simple, act_skbedit, and avoid useless 'goto
end' in act_connmark, thanks a lot to Vlad Buslov.
- avoid dereferencing 'goto_chain' in tcf_gact_goto_chain_index(), so
we don't have to care about the grace period there.
- let actions respect the grace period when they release chains, thanks
to Cong Wang and Vlad Buslov.
Changes since RFC:
- include a fix for all TC actions
- add a selftest for each TC action
- squash fix for refcount leaks into a single patch, the first in the
series, thanks to Cong Wang
- ensure that chain refcount is released without tcfa_lock held, thanks
to Vlad Buslov
Notes:
(1) act_ipt didn't need any fix, as the control action is constantly equal
to TC_ACT_OK.
(2) the selftest for act_simple fails because userspace tc backend for
'simple' does not parse the control action correctly (and hardcodes it
to TC_ACT_PIPE).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Wed, 20 Mar 2019 14:00:16 +0000 (15:00 +0100)]
net/sched: let actions use RCU to access 'goto_chain'
use RCU when accessing the action chain, to avoid use after free in the
traffic path when 'goto chain' is replaced on existing TC actions (see
script below). Since the control action is read in the traffic path
without holding the action spinlock, we need to explicitly ensure that
a->goto_chain is not NULL before dereferencing (i.e it's not sufficient
to rely on the value of TC_ACT_GOTO_CHAIN bits). Not doing so caused NULL
dereferences in tcf_action_goto_chain_exec() when the following script:
# tc chain add dev dd0 chain 42 ingress protocol ip flower \
> ip_proto udp action pass index 4
# tc filter add dev dd0 ingress protocol ip flower \
> ip_proto udp action csum udp goto chain 42 index 66
# tc chain del dev dd0 chain 42 ingress
(start UDP traffic towards dd0)
# tc action replace action csum udp pass index 66
was run repeatedly for several hours.
Suggested-by: Cong Wang <xiyou.wangcong@gmail.com> Suggested-by: Vlad Buslov <vladbu@mellanox.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Wed, 20 Mar 2019 14:00:15 +0000 (15:00 +0100)]
net/sched: don't dereference a->goto_chain to read the chain index
callers of tcf_gact_goto_chain_index() can potentially read an old value
of the chain index, or even dereference a NULL 'goto_chain' pointer,
because 'goto_chain' and 'tcfa_action' are read in the traffic path
without caring of concurrent write in the control path. The most recent
value of chain index can be read also from a->tcfa_action (it's encoded
there together with TC_ACT_GOTO_CHAIN bits), so we don't really need to
dereference 'goto_chain': just read the chain id from the control action.
Fixes: e457d86ada27 ("net: sched: add couple of goto_chain helpers") Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Wed, 20 Mar 2019 14:00:12 +0000 (15:00 +0100)]
net/sched: act_skbmod: validate the control action inside init()
the following script:
# tc qdisc add dev crash0 clsact
# tc filter add dev crash0 egress matchall \
> action skbmod set smac 00:c1:a0:c1:a0:00 pass index 90
# tc actions replace action skbmod \
> set smac 00:c1:a0:c1:a0:00 goto chain 42 index 90 cookie c1a0c1a0
# tc actions show action skbmod
had the following output:
src MAC address <00:c1:a0:c1:a0:00>
src MAC address <00:c1:a0:c1:a0:00>
Error: Failed to init TC action chain.
We have an error talking to the kernel
total acts 1
action order 0: skbmod goto chain 42 set smac 00:c1:a0:c1:a0:00
index 90 ref 2 bind 1
cookie c1a0c1a0
Then, the first packet transmitted by crash0 made the kernel crash:
Davide Caratti [Wed, 20 Mar 2019 14:00:07 +0000 (15:00 +0100)]
net/sched: act_pedit: validate the control action inside init()
the following script:
# tc filter add dev crash0 egress matchall \
> action pedit ex munge ip ttl set 10 pass index 90
# tc actions replace action pedit \
> ex munge ip ttl set 10 goto chain 42 index 90 cookie c1a0c1a0
# tc actions show action pedit
had the following output:
Error: Failed to init TC action chain.
We have an error talking to the kernel
total acts 1
action order 0: pedit action goto chain 42 keys 1
index 90 ref 2 bind 1
key #0 at ipv4+8: val 0a000000 mask 00ffffff
cookie c1a0c1a0
Then, the first packet transmitted by crash0 made the kernel crash:
Validating the control action within tcf_mirred_init() proved to fix the
above issue. For the same reason, postpone the assignment of tcfa_action
and tcfm_eaction to avoid partial reconfiguration of a mirred rule when
it's replaced by another one that mirrors to a device that does not
exist. A TDC selftest is added to verify the correct behavior.
Fixes: db50514f9a9c ("net: sched: add termination action to allow goto chain") Fixes: 97763dc0f401 ("net_sched: reject unknown tcfa_action values") Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Wed, 20 Mar 2019 13:59:59 +0000 (14:59 +0100)]
net/sched: prepare TC actions to properly validate the control action
- pass a pointer to struct tcf_proto in each actions's init() handler,
to allow validating the control action, checking whether the chain
exists and (eventually) refcounting it.
- remove code that validates the control action after a successful call
to the action's init() handler, and replace it with a test that forbids
addition of actions having 'goto_chain' and NULL goto_chain pointer at
the same time.
- add tcf_action_check_ctrlact(), that will validate the control action
and eventually allocate the action 'goto_chain' within the init()
handler.
- add tcf_action_set_ctrlact(), that will assign the control action and
swap the current 'goto_chain' pointer with the new given one.
This disallows 'goto_chain' on actions that don't initialize it properly
in their init() handler, i.e. calling tcf_action_check_ctrlact() after
successful IDR reservation and then calling tcf_action_set_ctrlact()
to assign 'goto_chain' and 'tcf_action' consistently.
By doing this, the kernel does not leak anymore refcounts when a valid
'goto chain' handle is replaced in TC actions, causing kmemleak splats
like the following one:
Harini Katakam [Wed, 20 Mar 2019 13:42:22 +0000 (19:12 +0530)]
net: macb: Add null check for PCLK and HCLK
Both PCLK and HCLK are "required" clocks according to macb devicetree
documentation. There is a chance that devm_clk_get doesn't return a
negative error but just a NULL clock structure instead. In such a case
the driver proceeds as usual and uses pclk value 0 to calculate MDC
divisor which is incorrect. Hence fix the same in clock initialization.
Signed-off-by: Harini Katakam <harini.katakam@xilinx.com> Signed-off-by: David S. Miller <davem@davemloft.net>
The following patchset contains Netfilter fixes for your net tree:
1) Remove a direct dependency with IPv6 introduced by the
sip_external_media feature, from Alin Nastac.
2) Fix bogus ENOENT when removing interval elements from set.
3) Set transport_header from br_netfilter to mimic the stack
behaviour, this partially fixes a checksum validation bug
from the SCTP connection tracking, from Xin Long.
4) Fix undefined reference to symbol in xt_TEE, due to missing
Kconfig dependencies, from Arnd Bergmann.
5) Check for NULL in skb_header_pointer() calls in ip6t_shr,
from Kangjie Lu.
6) Fix bogus EBUSY when removing an existing conntrack helper from
a transaction.
7) Fix module autoload of the redirect extension.
8) Remove duplicated transition in flowtable diagram in the existing
documentation.
9) Missing .release_ops call from error path in newrule() which
results module refcount leak, from Taehee Yoo.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
YueHaibing [Thu, 21 Mar 2019 07:02:50 +0000 (15:02 +0800)]
genetlink: Fix a memory leak on error path
In genl_register_family(), when idr_alloc() fails,
we forget to free the memory we possibly allocate for
family->attrbuf.
Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: 2ae0f17df1cd ("genetlink: use idr to track families") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Erik Hugne [Thu, 21 Mar 2019 08:11:59 +0000 (09:11 +0100)]
tipc: fix cancellation of topology subscriptions
When cancelling a subscription, we have to clear the cancel bit in the
request before iterating over any established subscriptions with memcmp.
Otherwise no subscription will ever be found, and it will not be
possible to explicitly unsubscribe individual subscriptions.
Fixes: 8985ecc7c1e0 ("tipc: simplify endianness handling in topology subscriber") Signed-off-by: Erik Hugne <erik.hugne@gmail.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
When kzalloc() fails in push_stack(), free_verifier_state() will free
current verifier state. As push_stack() returns, dst_reg was restored
if ptr_is_dst_reg is false. However, as member of the cur_state,
dst_reg is also freed, and error occurs when dereferencing dst_reg.
Simply fix it by testing ret of push_stack() before restoring dst_reg.
Fixes: 979d63d50c0c ("bpf: prevent out of bounds speculation on pointer arithmetic") Signed-off-by: Xu Yu <xuyu@linux.alibaba.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Martin KaFai Lau [Mon, 18 Mar 2019 17:37:13 +0000 (10:37 -0700)]
bpf: Only print ref_obj_id for refcounted reg
Naresh reported that test_align fails because of the mismatch at the
verbose printout of the register states. The reason is due to the newly
added ref_obj_id.
ref_obj_id is only useful for refcounted reg. Thus, this patch fixes it
by only printing ref_obj_id for refcounted reg. While at it, it also uses
comma instead of space to separate between "id" and "ref_obj_id".
Fixes: 1b986589680a ("bpf: Fix bpf_tcp_sock and bpf_sk_fullsock issue related to bpf_sk_release") Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Signed-off-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
David S. Miller [Wed, 20 Mar 2019 19:43:52 +0000 (12:43 -0700)]
Merge branch 'ks8851-fixes'
Lukas Wunner says:
====================
ks8851 fixes & cleanups
Four fixes and two cleanups for the Microchip (formerly Micrel) KSZ8851
SPI Ethernet driver.
Some of the fixes might even pass as stable material, but I haven't marked
them as such for cautiousness: Doesn't hurt letting them bake in linux-next
for a few weeks to raise the confidence, even though we've tested them
extensively on our Revolution Pi open source PLCs.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Lukas Wunner [Wed, 20 Mar 2019 14:02:00 +0000 (15:02 +0100)]
net: ks8851: Deduplicate register macros
The ks8851 chip is sold either with an SPI interface (KSZ8851SNL) or
with a so-called non-PCI interface (KSZ8851-16MLL). When the driver
for the latter was introduced with commit a55c0a0ed415 ("drivers/net:
ks8851_mll ethernet network driver"), it duplicated the register macros
introduced by the driver for the former with commit 3ba81f3ece3c ("net:
Micrel KS8851 SPI network driver").
The chips are almost identical, so the duplication seems unwarranted.
There are a handful of bits which are in use on the KSZ8851-16MLL but
reserved on the KSZ8851SNL, and vice-versa, but there are no actual
collisions.
Thus, remove the duplicate definitions from the KSZ8851-16MLL driver.
Mark all bits which differ between the two chips. Move the SPI frame
opcodes, which are specific to KSZ8851SNL, to its driver.
The KSZ8851-16MLL driver added a RXFCTR_THRESHOLD_MASK macro which is a
duplication of the RXFCTR_RXFCT_MASK macro, rename it where it's used.
Same for P1MBCR_FORCE_FDX, which duplicates the BMCR_FULLDPLX macro and
OBCR_ODS_16MA, which duplicates OBCR_ODS_16mA.
Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Tristram Ha <Tristram.Ha@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Lukas Wunner [Wed, 20 Mar 2019 14:02:00 +0000 (15:02 +0100)]
net: ks8851: Fix register macro misnomers
In the header file accompanying the ks8851 driver, the P1SCLMD register
macros are misnamed, they actually pertain to the P1CR register.
The P1CR macros in turn pertain to the P1SR register, see pages 65 to 68
of the spec:
http://www.hqchip.com/uploads/pdf/201703/47c98946d6c97a4766e14db3f24955f2.pdf
The misnomers have no negative consequences so far because the macros
aren't used by ks8851.c, but that's about to change.
Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Tristram Ha <Tristram.Ha@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Lukas Wunner [Wed, 20 Mar 2019 14:02:00 +0000 (15:02 +0100)]
net: ks8851: Set initial carrier state to down
The ks8851 chip's initial carrier state is down. A Link Change Interrupt
is signaled once interrupts are enabled if the carrier is up.
The ks8851 driver has it backwards by assuming that the initial carrier
state is up. The state is therefore misrepresented if the interface is
opened with no cable attached. Fix it.
The Link Change interrupt is sometimes not signaled unless the P1MBSR
register (which contains the Link Status bit) is read on ->ndo_open().
This might be a hardware erratum. Read the register by calling
mii_check_link(), which has the desirable side effect of setting the
carrier state to down if the cable was detached while the interface was
closed.
Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Tristram Ha <Tristram.Ha@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Lukas Wunner [Wed, 20 Mar 2019 14:02:00 +0000 (15:02 +0100)]
net: ks8851: Delay requesting IRQ until opened
The ks8851 driver currently requests the IRQ before registering the
net_device. Because the net_device name is used as IRQ name and is
still "eth%d" when the IRQ is requested, it's impossibe to tell IRQs
apart if multiple ks8851 chips are present. Most other drivers delay
requesting the IRQ until the net_device is opened. Do the same.
The driver doesn't enable interrupts on the chip before opening the
net_device and disables them when closing it, so there doesn't seem to
be a need to request the IRQ already on probe.
Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Tristram Ha <Tristram.Ha@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Lukas Wunner [Wed, 20 Mar 2019 14:02:00 +0000 (15:02 +0100)]
net: ks8851: Reassert reset pin if chip ID check fails
Commit 73fdeb82e963 ("net: ks8851: Add optional vdd_io regulator and
reset gpio") amended the ks8851 driver to briefly assert the chip's
reset pin on probe. It also amended the probe routine's error path to
reassert the reset pin if a subsequent initialization step fails.
However the commit misplaced reassertion of the reset pin in the error
path such that it is not performed if the check of the Chip ID and
Enable Register (CIDER) fails. The error path is therefore slightly
asymmetrical to the probe routine's body. Fix it.
Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Nishanth Menon <nm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Lukas Wunner [Wed, 20 Mar 2019 14:02:00 +0000 (15:02 +0100)]
net: ks8851: Dequeue RX packets explicitly
The ks8851 driver lets the chip auto-dequeue received packets once they
have been read in full. It achieves that by setting the ADRFE flag in
the RXQCR register ("Auto-Dequeue RXQ Frame Enable").
However if allocation of a packet's socket buffer or retrieval of the
packet over the SPI bus fails, the packet will not have been read in
full and is not auto-dequeued. Such partial retrieval of a packet
confuses the chip's RX queue management: On the next RX interrupt,
the first packet read from the queue will be the one left there
previously and this one can be retrieved without issues. But for any
newly received packets, the frame header status and byte count registers
(RXFHSR and RXFHBCR) contain bogus values, preventing their retrieval.
The chip allows explicitly dequeueing a packet from the RX queue by
setting the RRXEF flag in the RXQCR register ("Release RX Error Frame").
This could be used to dequeue the packet in case of an error, but if
that error is a failed SPI transfer, it is unknown if the packet was
transferred in full and was auto-dequeued or if it was only transferred
in part and requires an explicit dequeue. The safest approach is thus
to always dequeue packets explicitly and forgo auto-dequeueing.
Without this change, I've witnessed packet retrieval break completely
when an SPI DMA transfer fails, requiring a chip reset. Explicit
dequeueing magically fixes this and makes packet retrieval absolutely
robust for me.
The chip's documentation suggests auto-dequeuing and uses the RRXEF
flag only to dequeue error frames which the driver doesn't want to
retrieve. But that seems to be a fair-weather approach.
Signed-off-by: Lukas Wunner <lukas@wunner.de> Cc: Frank Pavlic <f.pavlic@kunbus.de> Cc: Ben Dooks <ben.dooks@codethink.co.uk> Cc: Tristram Ha <Tristram.Ha@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Wed, 20 Mar 2019 06:49:38 +0000 (14:49 +0800)]
sctp: use memdup_user instead of vmemdup_user
In sctp_setsockopt_bindx()/__sctp_setsockopt_connectx(), it allocates
memory with addrs_size which is passed from userspace. We used flag
GFP_USER to put some more restrictions on it in Commit cacc06215271
("sctp: use GFP_USER for user-controlled kmalloc").
However, since Commit c981f254cc82 ("sctp: use vmemdup_user() rather
than badly open-coding memdup_user()"), vmemdup_user() has been used,
which doesn't check GFP_USER flag when goes to vmalloc_*(). So when
addrs_size is a huge value, it could exhaust memory and even trigger
oom killer.
This patch is to use memdup_user() instead, in which GFP_USER would
work to limit the memory allocation with a huge addrs_size.
Note we can't fix it by limiting 'addrs_size', as there's no demand
for it from RFC.
Reported-by: syzbot+ec1b7575afef85a0e5ca@syzkaller.appspotmail.com Fixes: c981f254cc82 ("sctp: use vmemdup_user() rather than badly open-coding memdup_user()") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
It was caused by the lookup function __ip6_route_redirect() returns NULL in
fib6_rule_lookup() when ip6_create_rt_rcu() returns NULL.
So we fix it by simply making ip6_create_rt_rcu() return ip6_null_entry
instead of NULL.
v1->v2:
- move down 'fallback:' to make it more readable.
Fixes: e873e4b9cc7e ("ipv6: use fib6_info_hold_safe() when necessary") Reported-by: Jianlin Shi <jishi@redhat.com> Suggested-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Reviewed-by: David Ahern <dsahern@gmail.com> Acked-by: Wei Wang <weiwan@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Christoph Paasch [Tue, 19 Mar 2019 06:14:52 +0000 (23:14 -0700)]
net/packet: Set __GFP_NOWARN upon allocation in alloc_pg_vec
Since commit fc62814d690c ("net/packet: fix 4gb buffer limit due to overflow check")
one can now allocate packet ring buffers >= UINT_MAX. However, syzkaller
found that that triggers a warning:
We should allocate with __GFP_NOWARN to handle this.
Cc: Kal Conley <kal.conley@dectris.com> Cc: Andrey Konovalov <andreyknvl@google.com> Fixes: fc62814d690c ("net/packet: fix 4gb buffer limit due to overflow check") Signed-off-by: Christoph Paasch <cpaasch@apple.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Taehee Yoo [Tue, 19 Mar 2019 04:22:41 +0000 (13:22 +0900)]
netfilter: nf_tables: add missing ->release_ops() in error path of newrule()
->release_ops() callback releases resources and this is used in error path.
If nf_tables_newrule() fails after ->select_ops(), it should release
resources. but it can not call ->destroy() because that should be called
after ->init().
At this point, ->release_ops() should be used for releasing resources.
Result:
Module Size Used by
xt_tcpudp 20480 2 <-- it should be 0
Fixes: b8e204006340 ("netfilter: nft_compat: use .release_ops and remove list of extension") Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch adds support for 6PE (RFC 4798) which uses IPv4-mapped IPv6
nexthop to connect IPv6 islands over IPv4 only MPLS network core.
Prior to this fix, to find the link-layer destination mac address, 6PE
enabled host/router was sending IPv6 ND requests for IPv4-mapped IPv6
nexthop address over the interface facing the IPv4 only core which
wouldn't success as the core is IPv6 free.
This fix changes that behavior on 6PE host to treat the nexthop as IPv4
address and send ARP requests whenever the next-hop address is an
IPv4-mapped IPv6 address.
Below topology illustrates the issue and how the patch addresses it.
R0 and R2 act as 6PE routers of IPv6 islands. R1 is IPv4 only with MPLS tunnels
between R0,R1 and R1,R2.
docker exec r0 ip -f inet6 route add abcd::2.2.2.2/128 nexthop encap mpls 100 via ::ffff:172.18.0.11 dev eth1
docker exec r2 ip -f inet6 route add abcd::1.1.1.1/128 nexthop encap mpls 200 via ::ffff:172.19.0.11 dev eth4
docker exec r1 ip -f mpls route add 100 via inet 172.19.0.12 dev eth3
docker exec r1 ip -f mpls route add 200 via inet 172.18.0.10 dev eth2
With the change, when R0 sends an IPv6 packet over MPLS tunnel to abcd::2.2.2.2,
using ::ffff:172.18.0.11 as the nexthop, it does neighbor discovery for
172.18.18.0.11.
Signed-off-by: Vinay K Nallamothu <nvinay@juniper.net> Tested-by: Avinash Lingala <ar977m@att.com> Tested-by: Aravind Srinivas Srinivasa Prabhakar <aprabh@juniper.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Arnd Bergmann [Tue, 19 Mar 2019 21:15:58 +0000 (22:15 +0100)]
3c515: fix integer overflow warning
clang points out a harmless signed integer overflow:
drivers/net/ethernet/3com/3c515.c:1530:66: error: implicit conversion from 'int' to 'short' changes value from 32783 to -32753 [-Werror,-Wconstant-conversion]
new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast | RxProm;
~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
drivers/net/ethernet/3com/3c515.c:1532:52: error: implicit conversion from 'int' to 'short' changes value from 32775 to -32761 [-Werror,-Wconstant-conversion]
new_mode = SetRxFilter | RxStation | RxMulticast | RxBroadcast;
~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
drivers/net/ethernet/3com/3c515.c:1534:38: error: implicit conversion from 'int' to 'short' changes value from 32773 to -32763 [-Werror,-Wconstant-conversion]
new_mode = SetRxFilter | RxStation | RxBroadcast;
~ ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
Make the variable unsigned to avoid the overflow.
Fixes: Linux-2.1.128pre1 Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 19 Mar 2019 12:46:18 +0000 (05:46 -0700)]
dccp: do not use ipv6 header for ipv4 flow
When a dual stack dccp listener accepts an ipv4 flow,
it should not attempt to use an ipv6 header or
inet6_iif() helper.
Fixes: 3df80d9320bc ("[DCCP]: Introduce DCCPv6") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 19 Mar 2019 12:45:35 +0000 (05:45 -0700)]
tcp: do not use ipv6 header for ipv4 flow
When a dual stack tcp listener accepts an ipv4 flow,
it should not attempt to use an ipv6 header or tcp_v6_iif() helper.
Fixes: 1397ed35f22d ("ipv6: add flowinfo for tcp6 pkt_options for all cases") Fixes: df3687ffc665 ("ipv6: add the IPV6_FL_F_REFLECT flag to IPV6_FL_A_GET") Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
YueHaibing [Tue, 19 Mar 2019 02:16:53 +0000 (10:16 +0800)]
net-sysfs: call dev_hold if kobject_init_and_add success
In netdev_queue_add_kobject and rx_queue_add_kobject,
if sysfs_create_group failed, kobject_put will call
netdev_queue_release to decrease dev refcont, however
dev_hold has not be called. So we will see this while
unregistering dev:
unregister_netdevice: waiting for bcsh0 to become free. Usage count = -1
Reported-by: Hulk Robot <hulkci@huawei.com> Fixes: d0d668371679 ("net: don't decrement kobj reference count on init failure") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Aaro Koskinen [Mon, 18 Mar 2019 21:36:08 +0000 (23:36 +0200)]
net: stmmac: fix memory corruption with large MTUs
When using 16K DMA buffers and ring mode, the DES3 refill is not working
correctly as the function is using a bogus pointer for checking the
private data. As a result stale pointers will remain in the RX descriptor
ring, so DMA will now likely overwrite/corrupt some already freed memory.
As simple reproducer, just receive some UDP traffic:
# ifconfig eth0 down; ifconfig eth0 mtu 9000; ifconfig eth0 up
# iperf3 -c 192.168.253.40 -u -b 0 -R
If you didn't crash by now check the RX descriptors to find non-contiguous
RX buffers:
# ping -s 8200 192.168.253.40
PING 192.168.253.40 (192.168.253.40) 8200(8228) bytes of data.
8208 bytes from 192.168.253.40: icmp_seq=1 ttl=64 time=1.00 ms
wrong data byte #8144 should be 0xd0 but was 0x88
Fix the wrong pointer. Also we must refill DES3 only if the DMA buffer
size is 16K.
Fixes: 54139cf3bb33 ("net: stmmac: adding multiple buffers for rx") Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com> Acked-by: Jose Abreu <joabreu@synopsys.com> Signed-off-by: David S. Miller <davem@davemloft.net>
A recently added function in mlxsw triggers a harmless compiler warning:
In file included from drivers/net/ethernet/mellanox/mlxsw/core.h:17,
from drivers/net/ethernet/mellanox/mlxsw/core_env.c:7:
drivers/net/ethernet/mellanox/mlxsw/core_env.c: In function 'mlxsw_env_module_temp_thresholds_get':
drivers/net/ethernet/mellanox/mlxsw/reg.h:8015:45: error: '*' in boolean context, suggest '&&' instead [-Werror=int-in-bool-context]
#define MLXSW_REG_MTMP_TEMP_TO_MC(val) (val * 125)
~~~~~^~~~~~
drivers/net/ethernet/mellanox/mlxsw/core_env.c:116:8: note: in expansion of macro 'MLXSW_REG_MTMP_TEMP_TO_MC'
if (!MLXSW_REG_MTMP_TEMP_TO_MC(module_temp)) {
^~~~~~~~~~~~~~~~~~~~~~~~~
The warning is normally disabled, but it would be nice to enable
it to find real bugs, and there are no other known instances at
the moment.
Replace the negation with a zero-comparison, which also matches
the comment above it.
Fixes: d93c19a1d95c ("mlxsw: core: Add API for QSFP module temperature thresholds reading") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 19 Mar 2019 18:01:24 +0000 (11:01 -0700)]
Merge branch 'ieee802154-for-davem-2019-03-19' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan
Stefan Schmidt says:
====================
pull-request: ieee802154 for net 2019-03-19
An update from ieee802154 for your *net* tree.
Kangjie Lu fixed a potential NULL pointer deref in the adf7242 driver and Li
RongQing make sure we propagate a netlink return code to the caller.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
My commit 26a7b5473191 ("mt76x02: set protection according to ht
operation element") enabled by default RTS/CTS protection for OFDM
and CCK traffic, because MT_TX_RTS_CFG_THRESH is configured to non
0xffff by initvals and .set_rts_threshold callback is not called by
mac80211 on initialization, only on user request or during
ieee80211_reconfig() (suspend/resuem or restart_hw).
Enabling RTS/CTS cause some problems when sending probe request
frames by hcxdumptool penetration tool, but I expect it can cause
other issues on different scenarios.
Restore previous setting of RTS/CTS being disabled by default for
OFDM/CCK by changing MT_TX_RTS_CFG_THRESH initvals to 0xffff.
Fixes: 26a7b5473191 ("mt76x02: set protection according to ht operation element") Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Lorenzo Bianconi [Mon, 11 Mar 2019 13:24:35 +0000 (14:24 +0100)]
mt76: fix schedule while atomic in mt76x02_reset_state
Fix following schedule while atomic in mt76x02_reset_state
since synchronize_rcu is run inside a RCU section
[44036.944222] mt76x2e 0000:06:00.0: MCU message 31 (seq 3) timed out
[44036.944281] BUG: sleeping function called from invalid context at kernel/rcu/tree_exp.h:818
[44036.944284] in_atomic(): 1, irqs_disabled(): 0, pid: 28066, name: kworker/u4:1
[44036.944287] INFO: lockdep is turned off.
[44036.944292] CPU: 1 PID: 28066 Comm: kworker/u4:1 Tainted: G W 5.0.0-rc7-wdn-t1+ #7
[44036.944294] Hardware name: Dell Inc. Studio XPS 1340/0K183D, BIOS A11 09/08/2009
[44036.944305] Workqueue: phy1 mt76x02_wdt_work [mt76x02_lib]
[44036.944308] Call Trace:
[44036.944317] dump_stack+0x67/0x90
[44036.944322] ___might_sleep.cold.88+0x9f/0xaf
[44036.944327] rcu_blocking_is_gp+0x13/0x50
[44036.944330] synchronize_rcu+0x17/0x80
[44036.944337] mt76_sta_state+0x138/0x1d0 [mt76]
[44036.944349] mt76x02_wdt_work+0x1c9/0x610 [mt76x02_lib]
[44036.944355] process_one_work+0x2a5/0x620
[44036.944361] worker_thread+0x35/0x3e0
[44036.944368] kthread+0x11c/0x140
[44036.944376] ret_from_fork+0x3a/0x50
[44036.944384] BUG: scheduling while atomic: kworker/u4:1/28066/0x00000002
[44036.944387] INFO: lockdep is turned off.
[44036.944389] Modules linked in: cmac ctr ccm af_packet snd_hda_codec_hdmi
Introduce __mt76_sta_remove in order to run sta_remove without holding dev->mutex.
Move __mt76_sta_remove outside of RCU section in mt76x02_reset_state
Fixes: e4ebb8b403d1 ("mt76: mt76x2: implement full device restart on watchdog reset") Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Since some USB device IDs are duplicated between mt76x0u, mt7601u
and mt76x2u device, check chip version on probe and return error if
not match the driver.
Don't think this is serious issue, probe most likely will fail at
some other point for wrong device, but we do not have to configure
it if we know is not our device.
Reported-by: Xose Vazquez Perez <xose.vazquez@gmail.com> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Since some USB device IDs are duplicated between mt7601u and mt76x0u
devices, check chip version on probe and return error if not match
0x7601.
Don't think this is serious issue, probe most likely will fail at
some other point for wrong device, but we do not have to configure
it if we know is not mt7601u device.
Reported-by: Xose Vazquez Perez <xose.vazquez@gmail.com> Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> Acked-by: Jakub Kicinski <kubakici@wp.pl> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Provide an explanation of what is expected with respect to sending new
versions of specific patches within a patch series, as well as what
happens if an earlier patch series accidentally gets merged).
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 19 Mar 2019 01:34:45 +0000 (18:34 -0700)]
Merge branch 's390-qeth-fixes'
Julian Wiedmann says:
====================
s390/qeth: fixes 2019-03-18
please apply the following three patches to -net. The first two are fixes
for minor race conditions in the probe code, while the third one gets
dropwatch working (again).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Mon, 18 Mar 2019 15:40:56 +0000 (16:40 +0100)]
s390/qeth: be drop monitor friendly
As part of the TX completion path, qeth_release_skbs() frees the completed
skbs with __skb_queue_purge(). This ends in kfree_skb(), reporting every
completed skb as dropped.
On the other hand when dropping an skb in .ndo_start_xmit, we end up
calling consume_skb()... where we should be using kfree_skb() so that
drop monitors get notified.
Switch the drop/consume logic around, and also don't accumulate dropped
packets in the tx_errors statistics.
Fixes: dc149e3764d8 ("s390/qeth: replace open-coded skb_queue_walk()") Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Mon, 18 Mar 2019 15:40:55 +0000 (16:40 +0100)]
s390/qeth: fix race when initializing the IP address table
The ucast IP table is utilized by some of the L3-specific sysfs attributes
that qeth_l3_create_device_attributes() provides. So initialize the table
_before_ registering the attributes.
Fixes: ebccc7397e4a ("s390/qeth: add missing hash table initializations") Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Julian Wiedmann [Mon, 18 Mar 2019 15:40:54 +0000 (16:40 +0100)]
s390/qeth: don't erase configuration while probing
The HW trap and VNICC configuration is exposed via sysfs, and may have
already been modified when qeth_l?_probe_device() attempts to initialize
them. So (1) initialize the VNICC values a little earlier, and (2) don't
bother about the HW trap mode, it was already initialized before.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Bjorn Helgaas [Mon, 18 Mar 2019 13:51:06 +0000 (08:51 -0500)]
mISDN: hfcpci: Test both vendor & device ID for Digium HFC4S
The device ID alone does not uniquely identify a device. Test both the
vendor and device ID to make sure we don't mistakenly think some other
vendor's 0xB410 device is a Digium HFC4S. Also, instead of the bare hex
ID, use the same constant (PCI_DEVICE_ID_DIGIUM_HFC4S) used in the device
ID table.
No functional change intended.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:11 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_STREAM_SCHEDULER sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_STREAM_SCHEDULER sockopt.
Fixes: 7efba10d6bd2 ("sctp: add SCTP_FUTURE_ASOC and SCTP_CURRENT_ASSOC for SCTP_STREAM_SCHEDULER sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:10 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_EVENT sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_EVENT sockopt.
Fixes: d251f05e3ba2 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_EVENT sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:09 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_ENABLE_STREAM_RESET sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_ENABLE_STREAM_RESET sockopt.
Fixes: 99a62135e127 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_ENABLE_STREAM_RESET sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:08 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_DEFAULT_PRINFO sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_DEFAULT_PRINFO sockopt.
Fixes: 3a583059d187 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_DEFAULT_PRINFO sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:07 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_AUTH_DEACTIVATE_KEY sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_AUTH_DEACTIVATE_KEY sockopt.
Fixes: 2af66ff3edc7 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_AUTH_DEACTIVATE_KEY sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:06 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_AUTH_DELETE_KEY sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_AUTH_DELETE_KEY sockopt.
Fixes: 3adcc300603e ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_AUTH_DELETE_KEY sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:05 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_AUTH_ACTIVE_KEY sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_AUTH_ACTIVE_KEY sockopt.
Fixes: bf9fb6ad4f29 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_AUTH_ACTIVE_KEY sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:04 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_AUTH_KEY sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_AUTH_KEY sockopt.
Fixes: 7fb3be13a236 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_AUTH_KEY sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:03 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_MAX_BURST sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_MAX_BURST sockopt.
Fixes: e0651a0dc877 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_MAX_BURST sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:02 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_CONTEXT sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_CONTEXT sockopt.
Fixes: 49b037acca8c ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_CONTEXT sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:01 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_DEFAULT_SNDINFO sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_DEFAULT_SNDINFO sockopt.
Fixes: 92fc3bd928c9 ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_DEFAULT_SNDINFO sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Xin Long [Mon, 18 Mar 2019 12:06:00 +0000 (20:06 +0800)]
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_DELAYED_SACK sockopt
A similar fix as Patch "sctp: fix ignoring asoc_id for tcp-style sockets on
SCTP_DEFAULT_SEND_PARAM sockopt" on SCTP_DELAYED_SACK sockopt.
Fixes: 9c5829e1c49e ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_DELAYED_SACK sockopt") Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
sctp: fix ignoring asoc_id for tcp-style sockets on SCTP_DEFAULT_SEND_PARAM sockopt
Currently if the user pass an invalid asoc_id to SCTP_DEFAULT_SEND_PARAM
on a TCP-style socket, it will silently ignore the new parameters.
That's because after not finding an asoc, it is checking asoc_id against
the known values of CURRENT/FUTURE/ALL values and that fails to match.
IOW, if the user supplies an invalid asoc id or not, it should either
match the current asoc or the socket itself so that it will inherit
these later. Fixes it by forcing asoc_id to SCTP_FUTURE_ASSOC in case it
is a TCP-style socket without an asoc, so that the values get set on the
socket.
Fixes: 707e45b3dc5a ("sctp: use SCTP_FUTURE_ASSOC and add SCTP_CURRENT_ASSOC for SCTP_DEFAULT_SEND_PARAM sockopt") Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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