Nicolin Chen [Fri, 5 Oct 2018 23:59:04 +0000 (16:59 -0700)]
hwmon: (core) Add hwmon_in_enable attribute
According to hwmon ABI, in%d_enable is a sysfs interface that
allows user space to enable and disable the input sensor. So
this patch just simply adds the attribute to the list.
Arnd Bergmann [Tue, 2 Oct 2018 21:10:47 +0000 (23:10 +0200)]
hwmon: (ina3221) mark PM functions as __maybe_unused
When CONFIG_PM_SLEEP is disabled, we get a warning about unused
suspend/resume functions:
drivers/hwmon/ina3221.c:451:12: error: 'ina3221_resume' defined but not used [-Werror=unused-function]
static int ina3221_resume(struct device *dev)
drivers/hwmon/ina3221.c:428:12: error: 'ina3221_suspend' defined but not used [-Werror=unused-function]
static int ina3221_suspend(struct device *dev)
Picking the correct #ifdef check is hard, so let's remove
that check and instead mark the functions as __maybe_unused
to let the compiler silently drop them instead.
Nicolin Chen [Tue, 2 Oct 2018 01:05:23 +0000 (18:05 -0700)]
hwmon: (ina3221) Read channel input source info from DT
An ina3221 chip has three input ports. Each port is used
to measure the voltage and current of its input source.
The DT binding now has defined bindings for their input
sources, so the driver should read these information and
handle accordingly.
This patch adds a new structure of input source specific
information including input source label, shunt resistor
value and its connection status. It exposes these labels
via in[123]_label sysfs nodes upon available, and also
disables those channels where there are no input source
being connected. Meanwhile, it also adds in[123]_enable
sysfs nodes for users to get control of three channels,
and returns -ENODATA code for any sensor read according
to hwmon ABI.
Depending on the hardware design, an INA3221 chip might lose
its power during system suspend/resume. So this patch adds
a set of suspend and resume functions to cache the register
values including config register value and limit settings.
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
[groeck: Moved call to dev_set_drvdata()] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The three INA3221_CONFIG_MODE macros are not correctly defined here.
The MODE3-1 bits are located at BIT 2-0 according to the datasheet.
So this patch just fixes them by shifting all of them with a correct
offset. However, this isn't a crital bug fix as the driver does not
use any of them at this point.
hwmon: (ina3221) Add INA3221_CONFIG to volatile_table
The MSB (15th bit) of INA3221_CONFIG is a self-clear reset bit.
So this register should be added to the volatile_table of the
regmap_config. Otherwise, we will see this bit is sticky in the
regcache which might accidentally reset the chip when an actual
write happens to the register.
This might not be a severe bug for the current code line since
there's no second place touching the INA3221_CONFIG except the
reset routine in the probe().
MAX20751 is a PMBUS driver, which has its own maintainer entry.
On top of that, the entry for MAX20751 points to a non-existing file.
Drop it. Add various missing driver documentation files.
Reported-by: Joe Perches <joe@perches.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Technically this is not required because disabling the PWM should be
enough. However, when support for atomic operations was implemented in
the PWM subsystem, only actual changes to the PWM channel are applied
during pwm_config(), which means that during after resume from suspend
the old settings won't be applied.
One possible solution is for the PWM driver to implement its own PM
operations such that settings from before suspend get applied on resume.
This has the disadvantage of completely ignoring any particular ordering
requirements that PWM user drivers might have, so it is best to leave it
up to the user drivers to apply the settings that they want at the
appropriate time.
Another way to solve this would be to read back the current state of the
PWM at the time of resume. That way, in case the configuration was lost
during suspend, applying the old settings in PWM user drivers would
actually get them applied because they differ from the current settings.
However, not all PWM drivers support reading the hardware state, and not
all hardware may support it.
The best workaround at this point seems to be to let PWM user drivers
tell the PWM subsystem that the PWM is turned off by, in addition to
disabling it, also setting the duty cycle to 0. This causes the resume
operation to apply a configuration that is different from the current
configuration, resulting in the proper state from before suspend getting
restored.
NCT6798D is, with the exception of fan and pwm channel configuration
registers, similar to other chips of the series. One interesting
difference is the chip ID, which is now extended to 13 bit (the 12-bit
chip ID value overlaps with the chip ID of NCT6797D).
hwmon: (nct6796) Clean up and amend fan/pwm configuration for NCT6796D
Now that everything is separated, clean up fan and pwm configuration
for NCT6796D. While doing that, take the forgotten configuration register
cre0 into account to determine if AUXFANIN2 (fan5) and AUXFANOUT2 (pwm5)
are connected.
hwmon: (nct6775) Separate fan/pwm configuration detection for NCT6793D
While detecting the configuration for multiple chips in one go reduces
code size, it also increases code complexity. Separate chip detection
to improve code readability. As first step, separate detection for
NCT6793D.
hwmon: (nct6775) Declare and initialize LDN specific config variables earlier
Declare and initialize LDN / chip specific configuration variables
earlier. This simplifies re-using the configuration variables for
multiple chips and makes the code easier to read.
hwmon: (nct6775) Move config variable declarations and initializations
Group configuration variable declarations and initialization together.
While this results in reading more registers than necessary for a given
chip, it improves code readability and simplifies extending the code.
hwmon: (nct6775) Replace 'regval' with variables named after config registers
Using variables named after configuration registers makes it more obvious
which configuration register value is used, especially if more than one
configuration register value is used to determine a configuration detail.
Use variable names from chip datasheets (crXX) instead of regval_XX
for configuration register variables. This is shorter and, together
with subsequent changes, makes the code easier to read.
Clang warns when the address of a pointer is used in a boolean context
as it will always return true.
drivers/hwmon/scmi-hwmon.c:59:24: warning: address of array
'sensor->name' will always evaluate to 'true'
[-Wpointer-bool-conversion]
if (sensor && sensor->name)
~~ ~~~~~~~~^~~~
1 warning generated.
Remove the check as it isn't doing anything currently; if validation
of the contents of the data structure was intended by the original
author (since this line has been present from the first version of
this driver), it can be added in a follow-up patch.
Kun Yi [Tue, 11 Sep 2018 20:25:58 +0000 (13:25 -0700)]
hwmon: (lm75) Add MAX31725/6 support
MAX31725/MAX31726 are local temperature sensors with +/- 0.5 degree
Celsius accuracy and 16-bit (0.00390625 degrees Celsius) resolution.
They have a register mapping and encoding compatible with the lm75
series drivers. Address scan and extended temperature range are
not supported by this patch.
Tested on real hardware and verified temperature readings are correct.
Signed-off-by: Kun Yi <kunyi@google.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
hwmon: (k10temp) Support all Family 15h Model 6xh and Model 7xh processors
BIOS developer guides refer to Family 15h Models 60h-6fh and Family 15h
Models 70h-7fh. So far the driver only checked for Models 60h and 70h.
However, there are now processors with other model numbers in the same
families. Example is A10-9620P family 15h model 65h. Follow the developer
guides and mask the lower 4 bit of the model number to determine the
registers to use for reading temperatures and temperature limits.
All of these have been in linux-next with no reported issues."
* tag 'char-misc-4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
thunderbolt: Initialize after IOMMUs
thunderbolt: Do not handle ICM events after domain is stopped
firmware: Always initialize the fw_priv list object
docs: fpga: document fpga manager flags
fpga: bridge: fix obvious function documentation error
tools: hv: fcopy: set 'error' in case an unknown operation was requested
fpga: do not access region struct after fpga_region_unregister
Drivers: hv: vmbus: Use get/put_cpu() in vmbus_connect()
Merge tag 'usb-4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
I wrote:
"USB fixes for 4.19-rc7
Here are some small USB fixes for 4.19-rc7
These include:
- the usual xhci bugfixes for reported issues
- some new serial driver device ids
- bugfix for the option serial driver for some devices
- bugfix for the cdc_acm driver that has been there for a long time.
All of these have been in linux-next for a while with no reported
issues."
* tag 'usb-4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: xhci-mtk: resume USB3 roothub first
xhci: Add missing CAS workaround for Intel Sunrise Point xHCI
usb: cdc_acm: Do not leak URB buffers
USB: serial: simple: add Motorola Tetra MTP6550 id
USB: serial: option: add two-endpoints device-id flag
USB: serial: option: improve Quectel EP06 detection
Merge tag 'powerpc-4.19-4' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Michael writes:
"powerpc fixes for 4.19 #4
Four regression fixes.
A fix for a change to lib/xz which broke our zImage loader when
building with XZ compression. OK'ed by Herbert who merged the
original patch.
The recent fix we did to avoid patching __init text broke some 32-bit
machines, fix that.
Our show_user_instructions() could be tricked into printing kernel
memory, add a check to avoid that.
And a fix for a change to our NUMA initialisation logic, which causes
crashes in some kdump configurations.
Thanks to:
Christophe Leroy, Hari Bathini, Jann Horn, Joel Stanley, Meelis
Roos, Murilo Opsfelder Araujo, Srikar Dronamraju."
* tag 'powerpc-4.19-4' of https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/numa: Skip onlining a offline node in kdump path
powerpc: Don't print kernel instructions in show_user_instructions()
powerpc/lib: fix book3s/32 boot failure due to code patching
lib/xz: Put CRC32_POLY_LE in xz_private.h
1) Fix truncation of 32-bit right shift in bpf, from Jann Horn.
2) Fix memory leak in wireless wext compat, from Stefan Seyfried.
3) Use after free in cfg80211's reg_process_hint(), from Yu Zhao.
4) Need to cancel pending work when unbinding in smsc75xx otherwise
we oops, also from Yu Zhao.
5) Don't allow enslaving a team device to itself, from Ido Schimmel.
6) Fix backwards compat with older userspace for rtnetlink FDB dumps.
From Mauricio Faria.
7) Add validation of tc policy netlink attributes, from David Ahern.
8) Fix RCU locking in rawv6_send_hdrinc(), from Wei Wang."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (26 commits)
net: mvpp2: Extract the correct ethtype from the skb for tx csum offload
ipv6: take rcu lock in rawv6_send_hdrinc()
net: sched: Add policy validation for tc attributes
rtnetlink: fix rtnl_fdb_dump() for ndmsg header
yam: fix a missing-check bug
net: bpfilter: Fix type cast and pointer warnings
net: cxgb3_main: fix a missing-check bug
bpf: 32-bit RSH verification must truncate input before the ALU op
net: phy: phylink: fix SFP interface autodetection
be2net: don't flip hw_features when VXLANs are added/deleted
net/packet: fix packet drop as of virtio gso
net: dsa: b53: Keep CPU port as tagged in all VLANs
openvswitch: load NAT helper
bnxt_en: get the reduced max_irqs by the ones used by RDMA
bnxt_en: free hwrm resources, if driver probe fails.
bnxt_en: Fix enables field in HWRM_QUEUE_COS2BW_CFG request
bnxt_en: Fix VNIC reservations on the PF.
team: Forbid enslaving team device to itself
net/usb: cancel pending work when unbinding smsc75xx
mlxsw: spectrum: Delete RIF when VLAN device is removed
...
* akpm:
mm: madvise(MADV_DODUMP): allow hugetlbfs pages
ocfs2: fix locking for res->tracking and dlm->tracking_list
mm/vmscan.c: fix int overflow in callers of do_shrink_slab()
mm/vmstat.c: skip NR_TLB_REMOTE_FLUSH* properly
mm/vmstat.c: fix outdated vmstat_text
proc: restrict kernel stack dumps to root
mm/hugetlb: add mmap() encodings for 32MB and 512MB page sizes
mm/migrate.c: split only transparent huge pages when allocation fails
ipc/shm.c: use ERR_CAST() for shm_lock() error return
mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl
mm, thp: fix mlocking THP page with migration enabled
ocfs2: fix crash in ocfs2_duplicate_clusters_by_page()
hugetlb: take PMD sharing into account when flushing tlb/caches
mm: migration: fix migration of huge PMD shared pages
hugetlbfs pages have VM_DONTEXPAND in the VmFlags driver pages based on
author testing with analysis from Florian Weimer[1].
The inclusion of VM_DONTEXPAND into the VM_SPECIAL defination was a
consequence of the large useage of VM_DONTEXPAND in device drivers.
A consequence of [2] is that VM_DONTEXPAND marked pages are unable to be
marked DODUMP.
A user could quite legitimately madvise(MADV_DONTDUMP) their hugetlbfs
memory for a while and later request that madvise(MADV_DODUMP) on the same
memory. We correct this omission by allowing madvice(MADV_DODUMP) on
hugetlbfs pages.
[1] https://stackoverflow.com/questions/52548260/madvisedodump-on-the-same-ptr-size-as-a-successful-madvisedontdump-fails-wit
[2] commit 0103bd16fb90 ("mm: prepare VM_DONTDUMP for using in drivers")
Link: http://lkml.kernel.org/r/20180930054629.29150-1-daniel@linux.ibm.com Link: https://lists.launchpad.net/maria-discuss/msg05245.html Fixes: 0103bd16fb90 ("mm: prepare VM_DONTDUMP for using in drivers") Reported-by: Kenneth Penza <kpenza@gmail.com> Signed-off-by: Daniel Black <daniel@linux.ibm.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ashish Samant [Fri, 5 Oct 2018 22:52:15 +0000 (15:52 -0700)]
ocfs2: fix locking for res->tracking and dlm->tracking_list
In dlm_init_lockres() we access and modify res->tracking and
dlm->tracking_list without holding dlm->track_lock. This can cause list
corruptions and can end up in kernel panic.
Fix this by locking res->tracking and dlm->tracking_list with
dlm->track_lock instead of dlm->spinlock.
Link: http://lkml.kernel.org/r/1529951192-4686-1-git-send-email-ashish.samant@oracle.com Signed-off-by: Ashish Samant <ashish.samant@oracle.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Acked-by: Joseph Qi <jiangqi903@gmail.com> Acked-by: Jun Piao <piaojun@huawei.com> Cc: Mark Fasheh <mark@fasheh.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Changwei Ge <ge.changwei@h3c.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kirill Tkhai [Fri, 5 Oct 2018 22:52:10 +0000 (15:52 -0700)]
mm/vmscan.c: fix int overflow in callers of do_shrink_slab()
do_shrink_slab() returns unsigned long value, and the placing into int
variable cuts high bytes off. Then we compare ret and 0xfffffffe (since
SHRINK_EMPTY is converted to ret type).
Thus a large number of objects returned by do_shrink_slab() may be
interpreted as SHRINK_EMPTY, if low bytes of their value are equal to
0xfffffffe. Fix that by declaration ret as unsigned long in these
functions.
Jann Horn [Fri, 5 Oct 2018 22:52:07 +0000 (15:52 -0700)]
mm/vmstat.c: skip NR_TLB_REMOTE_FLUSH* properly
5dd0b16cdaff ("mm/vmstat: Make NR_TLB_REMOTE_FLUSH_RECEIVED available even
on UP") made the availability of the NR_TLB_REMOTE_FLUSH* counters inside
the kernel unconditional to reduce #ifdef soup, but (either to avoid
showing dummy zero counters to userspace, or because that code was missed)
didn't update the vmstat_array, meaning that all following counters would
be shown with incorrect values.
This only affects kernel builds with
CONFIG_VM_EVENT_COUNTERS=y && CONFIG_DEBUG_TLBFLUSH=y && CONFIG_SMP=n.
Link: http://lkml.kernel.org/r/20181001143138.95119-2-jannh@google.com Fixes: 5dd0b16cdaff ("mm/vmstat: Make NR_TLB_REMOTE_FLUSH_RECEIVED available even on UP") Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Roman Gushchin <guro@fb.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Kemi Wang <kemi.wang@intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jann Horn [Fri, 5 Oct 2018 22:52:03 +0000 (15:52 -0700)]
mm/vmstat.c: fix outdated vmstat_text
7a9cdebdcc17 ("mm: get rid of vmacache_flush_all() entirely") removed the
VMACACHE_FULL_FLUSHES statistics, but didn't remove the corresponding
entry in vmstat_text. This causes an out-of-bounds access in
vmstat_show().
Luckily this only affects kernels with CONFIG_DEBUG_VM_VMACACHE=y, which
is probably very rare.
Link: http://lkml.kernel.org/r/20181001143138.95119-1-jannh@google.com Fixes: 7a9cdebdcc17 ("mm: get rid of vmacache_flush_all() entirely") Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Roman Gushchin <guro@fb.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Kemi Wang <kemi.wang@intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jann Horn [Fri, 5 Oct 2018 22:51:58 +0000 (15:51 -0700)]
proc: restrict kernel stack dumps to root
Currently, you can use /proc/self/task/*/stack to cause a stack walk on
a task you control while it is running on another CPU. That means that
the stack can change under the stack walker. The stack walker does
have guards against going completely off the rails and into random
kernel memory, but it can interpret random data from your kernel stack
as instruction pointers and stack pointers. This can cause exposure of
kernel stack contents to userspace.
Restrict the ability to inspect kernel stacks of arbitrary tasks to root
in order to prevent a local attacker from exploiting racy stack unwinding
to leak kernel task stack contents. See the added comment for a longer
rationale.
There don't seem to be any users of this userspace API that can't
gracefully bail out if reading from the file fails. Therefore, I believe
that this change is unlikely to break things. In the case that this patch
does end up needing a revert, the next-best solution might be to fake a
single-entry stack based on wchan.
Link: http://lkml.kernel.org/r/20180927153316.200286-1-jannh@google.com Fixes: 2ec220e27f50 ("proc: add /proc/*/stack") Signed-off-by: Jann Horn <jannh@google.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Ken Chen <kenchen@google.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Laura Abbott <labbott@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mm/migrate.c: split only transparent huge pages when allocation fails
split_huge_page_to_list() fails on HugeTLB pages. I was experimenting
with moving 32MB contig HugeTLB pages on arm64 (with a debug patch
applied) and hit the following stack trace when the kernel crashed.
When unmap_and_move[_huge_page]() fails due to lack of memory, the
splitting should happen only for transparent huge pages not for HugeTLB
pages. PageTransHuge() returns true for both THP and HugeTLB pages.
Hence the conditonal check should test PagesHuge() flag to make sure that
given pages is not a HugeTLB one.
Link: http://lkml.kernel.org/r/1537798495-4996-1-git-send-email-anshuman.khandual@arm.com Fixes: 94723aafb9 ("mm: unclutter THP migration") Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Zi Yan <zi.yan@cs.rutgers.edu> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kees Cook [Fri, 5 Oct 2018 22:51:48 +0000 (15:51 -0700)]
ipc/shm.c: use ERR_CAST() for shm_lock() error return
This uses ERR_CAST() instead of an open-coded cast, as it is casting
across structure pointers, which upsets __randomize_layout:
ipc/shm.c: In function `shm_lock':
ipc/shm.c:209:9: note: randstruct: casting between randomized structure pointer types (ssa): `struct shmid_kernel' and `struct kern_ipc_perm'
YueHaibing [Fri, 5 Oct 2018 22:51:44 +0000 (15:51 -0700)]
mm/gup_benchmark: fix unsigned comparison to zero in __gup_benchmark_ioctl
get_user_pages_fast() will return negative value if no pages were pinned,
then be converted to a unsigned, which is compared to zero, giving the
wrong result.
Link: http://lkml.kernel.org/r/20180921095015.26088-1-yuehaibing@huawei.com Fixes: 09e35a4a1ca8 ("mm/gup_benchmark: handle gup failures") Signed-off-by: YueHaibing <yuehaibing@huawei.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
mm, thp: fix mlocking THP page with migration enabled
A transparent huge page is represented by a single entry on an LRU list.
Therefore, we can only make unevictable an entire compound page, not
individual subpages.
If a user tries to mlock() part of a huge page, we want the rest of the
page to be reclaimable.
We handle this by keeping PTE-mapped huge pages on normal LRU lists: the
PMD on border of VM_LOCKED VMA will be split into PTE table.
Introduction of THP migration breaks[1] the rules around mlocking THP
pages. If we had a single PMD mapping of the page in mlocked VMA, the
page will get mlocked, regardless of PTE mappings of the page.
For tmpfs/shmem it's easy to fix by checking PageDoubleMap() in
remove_migration_pmd().
Anon THP pages can only be shared between processes via fork(). Mlocked
page can only be shared if parent mlocked it before forking, otherwise CoW
will be triggered on mlock().
For Anon-THP, we can fix the issue by munlocking the page on removing PTE
migration entry for the page. PTEs for the page will always come after
mlocked PMD: rmap walks VMAs from oldest to newest.
Larry Chen [Fri, 5 Oct 2018 22:51:37 +0000 (15:51 -0700)]
ocfs2: fix crash in ocfs2_duplicate_clusters_by_page()
ocfs2_duplicate_clusters_by_page() may crash if one of the extent's pages
is dirty. When a page has not been written back, it is still in dirty
state. If ocfs2_duplicate_clusters_by_page() is called against the dirty
page, the crash happens.
To fix this bug, we can just unlock the page and wait until the page until
its not dirty.
Mike Kravetz [Fri, 5 Oct 2018 22:51:33 +0000 (15:51 -0700)]
hugetlb: take PMD sharing into account when flushing tlb/caches
When fixing an issue with PMD sharing and migration, it was discovered via
code inspection that other callers of huge_pmd_unshare potentially have an
issue with cache and tlb flushing.
Use the routine adjust_range_if_pmd_sharing_possible() to calculate worst
case ranges for mmu notifiers. Ensure that this range is flushed if
huge_pmd_unshare succeeds and unmaps a PUD_SUZE area.
Link: http://lkml.kernel.org/r/20180823205917.16297-3-mike.kravetz@oracle.com Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mike Kravetz [Fri, 5 Oct 2018 22:51:29 +0000 (15:51 -0700)]
mm: migration: fix migration of huge PMD shared pages
The page migration code employs try_to_unmap() to try and unmap the source
page. This is accomplished by using rmap_walk to find all vmas where the
page is mapped. This search stops when page mapcount is zero. For shared
PMD huge pages, the page map count is always 1 no matter the number of
mappings. Shared mappings are tracked via the reference count of the PMD
page. Therefore, try_to_unmap stops prematurely and does not completely
unmap all mappings of the source page.
This problem can result is data corruption as writes to the original
source page can happen after contents of the page are copied to the target
page. Hence, data is lost.
This problem was originally seen as DB corruption of shared global areas
after a huge page was soft offlined due to ECC memory errors. DB
developers noticed they could reproduce the issue by (hotplug) offlining
memory used to back huge pages. A simple testcase can reproduce the
problem by creating a shared PMD mapping (note that this must be at least
PUD_SIZE in size and PUD_SIZE aligned (1GB on x86)), and using
migrate_pages() to migrate process pages between nodes while continually
writing to the huge pages being migrated.
To fix, have the try_to_unmap_one routine check for huge PMD sharing by
calling huge_pmd_unshare for hugetlbfs huge pages. If it is a shared
mapping it will be 'unshared' which removes the page table entry and drops
the reference on the PMD page. After this, flush caches and TLB.
mmu notifiers are called before locking page tables, but we can not be
sure of PMD sharing until page tables are locked. Therefore, check for
the possibility of PMD sharing before locking so that notifiers can
prepare for the worst possible case.
Link: http://lkml.kernel.org/r/20180823205917.16297-2-mike.kravetz@oracle.com
[mike.kravetz@oracle.com: make _range_in_vma() a static inline] Link: http://lkml.kernel.org/r/6063f215-a5c8-2f0c-465a-2c515ddc952d@oracle.com Fixes: 39dde65c9940 ("shared page table for hugetlb page") Signed-off-by: Mike Kravetz <mike.kravetz@oracle.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jerome Glisse <jglisse@redhat.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Merge tag 'for-4.19/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Mike writes:
"device mapper fixes
- Fix a DM thinp __udivdi3 undefined on 32-bit bug introduced during
4.19 merge window.
- Fix leak and dangling pointer in DM multipath's scsi_dh related code.
- A couple stable@ fixes for DM cache's resize support.
- A DM raid fix to remove "const" from decipher_sync_action()'s return
type."
* tag 'for-4.19/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache: fix resize crash if user doesn't reload cache table
dm cache metadata: ignore hints array being too small during resize
dm raid: remove bogus const from decipher_sync_action() return type
dm mpath: fix attached_handler_name leak and dangling hw_handler_name pointer
dm thin metadata: fix __udivdi3 undefined on 32-bit
Merge tag 'pm-4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Rafael writes:
"Power management fix for 4.19-rc7
Fix a bug that may cause runtime PM to misbehave for some devices
after a failing or aborted system suspend which is nasty enough for
an -rc7 time frame fix."
* tag 'pm-4.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / core: Clear the direct_complete flag on errors
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Ingo writes:
"perf fixes:
- fix a CPU#0 hot unplug bug and a PCI enumeration bug in the x86 Intel uncore PMU driver
- fix a CPU event enumeration bug in the x86 AMD PMU driver
- fix a perf ring-buffer corruption bug when using tracepoints
- fix a PMU unregister locking bug"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/amd/uncore: Set ThreadMask and SliceMask for L3 Cache perf events
perf/x86/intel/uncore: Fix PCI BDF address of M3UPI on SKX
perf/ring_buffer: Prevent concurent ring buffer access
perf/x86/intel/uncore: Use boot_cpu_data.phys_proc_id instead of hardcorded physical package ID 0
perf/core: Fix perf_pmu_unregister() locking
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Ingo writes:
"x86 fixes:
Misc fixes:
- fix various vDSO bugs: asm constraints and retpolines
- add vDSO test units to make sure they never re-appear
- fix UV platform TSC initialization bug
- fix build warning on Clang"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/vdso: Fix vDSO syscall fallback asm constraint regression
x86/cpu/amd: Remove unnecessary parentheses
x86/vdso: Only enable vDSO retpolines when enabled and supported
x86/tsc: Fix UV TSC initialization
x86/platform/uv: Provide is_early_uv_system()
selftests/x86: Add clock_gettime() tests to test_vdso
x86/vdso: Fix asm constraints on vDSO syscall fallbacks
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Ingo writes:
"scheduler fixes:
These fixes address a rather involved performance regression between
v4.17->v4.19 in the sched/numa auto-balancing code. Since distros
really need this fix we accelerated it to sched/urgent for a faster
upstream merge.
NUMA scheduling and balancing performance is now largely back to
v4.17 levels, without reintroducing the NUMA placement bugs that
v4.18 and v4.19 fixed.
Many thanks to Srikar Dronamraju, Mel Gorman and Jirka Hladky, for
reporting, testing, re-testing and solving this rather complex set of
bugs."
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/numa: Migrate pages to local nodes quicker early in the lifetime of a task
mm, sched/numa: Remove rate-limiting of automatic NUMA balancing migration
sched/numa: Avoid task migration for small NUMA improvement
mm/migrate: Use spin_trylock() while resetting rate limit
sched/numa: Limit the conditions where scan period is reset
sched/numa: Reset scan rate whenever task moves across nodes
sched/numa: Pass destination CPU as a parameter to migrate_task_rq
sched/numa: Stop multiple tasks from moving to the CPU at the same time
Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Ingo writes:
"locking fixes:
A fix in the ww_mutex self-test that produces a scary splat, plus an
updates to the maintained-filed patters in MAINTAINER."
* 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/ww_mutex: Fix runtime warning in the WW mutex selftest
MAINTAINERS: Remove dead path from LOCKING PRIMITIVES entry
net: mvpp2: Extract the correct ethtype from the skb for tx csum offload
When offloading the L3 and L4 csum computation on TX, we need to extract
the l3_proto from the ethtype, independently of the presence of a vlan
tag.
The actual driver uses skb->protocol as-is, resulting in packets with
the wrong L4 checksum being sent when there's a vlan tag in the packet
header and checksum offloading is enabled.
This commit makes use of vlan_protocol_get() to get the correct ethtype
regardless the presence of a vlan tag.
Fixes: 3f518509dedc ("ethernet: Add new driver for Marvell Armada 375 network unit") Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wei Wang [Thu, 4 Oct 2018 17:12:37 +0000 (10:12 -0700)]
ipv6: take rcu lock in rawv6_send_hdrinc()
In rawv6_send_hdrinc(), in order to avoid an extra dst_hold(), we
directly assign the dst to skb and set passed in dst to NULL to avoid
double free.
However, in error case, we free skb and then do stats update with the
dst pointer passed in. This causes use-after-free on the dst.
Fix it by taking rcu read lock right before dst could get released to
make sure dst does not get freed until the stats update is done.
Note: we don't have this issue in ipv4 cause dst is not used for stats
update in v4.
Syzkaller reported following crash:
BUG: KASAN: use-after-free in rawv6_send_hdrinc net/ipv6/raw.c:692 [inline]
BUG: KASAN: use-after-free in rawv6_sendmsg+0x4421/0x4630 net/ipv6/raw.c:921
Read of size 8 at addr ffff8801d95ba730 by task syz-executor0/32088
Fixes: 1789a640f556 ("raw: avoid two atomics in xmit") Signed-off-by: Wei Wang <weiwan@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David Ahern [Wed, 3 Oct 2018 22:05:36 +0000 (15:05 -0700)]
net: sched: Add policy validation for tc attributes
A number of TC attributes are processed without proper validation
(e.g., length checks). Add a tca policy for all input attributes and use
when invoking nlmsg_parse.
The 2 Fixes tags below cover the latest additions. The other attributes
are a string (KIND), nested attribute (OPTIONS which does seem to have
validation in most cases), for dumps only or a flag.
Fixes: 5bc1701881e39 ("net: sched: introduce multichain support for filters") Fixes: d47a6b0e7c492 ("net: sched: introduce ingress/egress block index attributes for qdisc") Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Currently, rtnl_fdb_dump() assumes the family header is 'struct ifinfomsg',
which is not always true -- 'struct ndmsg' is used by iproute2 ('ip neigh').
The problem is, the function bails out early if nlmsg_parse() fails, which
does occur for iproute2 usage of 'struct ndmsg' because the payload length
is shorter than the family header alone (as 'struct ifinfomsg' is assumed).
This breaks backward compatibility with userspace -- nothing is sent back.
Some examples with iproute2 and netlink library for go [1]:
1) $ bridge fdb show
33:33:00:00:00:01 dev ens3 self permanent
01:00:5e:00:00:01 dev ens3 self permanent
33:33:ff:15:98:30 dev ens3 self permanent
The actual breakage was introduced by commit 0ff50e83b512 ("net: rtnetlink:
bail out from rtnl_fdb_dump() on parse error"), because nlmsg_parse() fails
if the payload length (with the _actual_ family header) is less than the
family header length alone (which is assumed, in parameter 'hdrlen').
This is true in the examples above with struct ndmsg, with size and payload
length shorter than struct ifinfomsg.
However, that commit just intends to fix something under the assumption the
family header is indeed an 'struct ifinfomsg' - by preventing access to the
payload as such (via 'ifm' pointer) if the payload length is not sufficient
to actually contain it.
The assumption was introduced by commit 5e6d24358799 ("bridge: netlink dump
interface at par with brctl"), to support iproute2's 'bridge fdb' command
(not 'ip neigh') which indeed uses 'struct ifinfomsg', thus is not broken.
So, in order to unbreak the 'struct ndmsg' family headers and still allow
'struct ifinfomsg' to continue to work, check for the known message sizes
used with 'struct ndmsg' in iproute2 (with zero or one attribute which is
not used in this function anyway) then do not parse the data as ifinfomsg.
Same examples with this patch applied (or revert/before the original fix):
$ bridge fdb show
33:33:00:00:00:01 dev ens3 self permanent
01:00:5e:00:00:01 dev ens3 self permanent
33:33:ff:15:98:30 dev ens3 self permanent
$ ip --family bridge neigh
dev ens3 lladdr 33:33:00:00:00:01 PERMANENT
dev ens3 lladdr 01:00:5e:00:00:01 PERMANENT
dev ens3 lladdr 33:33:ff:15:98:30 PERMANENT
Tested on mainline (v4.19-rc6) and net-next (3bd09b05b068).
References:
[1] netlink library for go (test-case)
https://github.com/vishvananda/netlink
$ cat ~/go/src/neighlist/main.go
package main
import ("fmt"; "syscall"; "github.com/vishvananda/netlink")
func main() {
neighs, _ := netlink.NeighList(0, syscall.AF_BRIDGE)
for _, neigh := range neighs { fmt.Printf("%#v\n", neigh) }
}
$ export GOPATH=~/go
$ go get github.com/vishvananda/netlink
$ go build neighlist
$ ~/go/src/neighlist/neighlist
Thanks to David Ahern for suggestions to improve this patch.
Fixes: 0ff50e83b512 ("net: rtnetlink: bail out from rtnl_fdb_dump() on parse error") Fixes: 5e6d24358799 ("bridge: netlink dump interface at par with brctl") Reported-by: Aidan Obley <aobley@pivotal.io> Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wenwen Wang [Fri, 5 Oct 2018 15:59:36 +0000 (10:59 -0500)]
yam: fix a missing-check bug
In yam_ioctl(), the concrete ioctl command is firstly copied from the
user-space buffer 'ifr->ifr_data' to 'ioctl_cmd' and checked through the
following switch statement. If the command is not as expected, an error
code EINVAL is returned. In the following execution the buffer
'ifr->ifr_data' is copied again in the cases of the switch statement to
specific data structures according to what kind of ioctl command is
requested. However, after the second copy, no re-check is enforced on the
newly-copied command. Given that the buffer 'ifr->ifr_data' is in the user
space, a malicious user can race to change the command between the two
copies. This way, the attacker can inject inconsistent data and cause
undefined behavior.
This patch adds a re-check in each case of the switch statement if there is
a second copy in that case, to re-check whether the command obtained in the
second copy is the same as the one in the first copy. If not, an error code
EINVAL will be returned.
Signed-off-by: Wenwen Wang <wang6495@umn.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
Shanthosh RK [Fri, 5 Oct 2018 15:27:48 +0000 (20:57 +0530)]
net: bpfilter: Fix type cast and pointer warnings
Fixes the following Sparse warnings:
net/bpfilter/bpfilter_kern.c:62:21: warning: cast removes address space
of expression
net/bpfilter/bpfilter_kern.c:101:49: warning: Using plain integer as
NULL pointer
Signed-off-by: Shanthosh RK <shanthosh.rk@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Wenwen Wang [Fri, 5 Oct 2018 13:48:27 +0000 (08:48 -0500)]
net: cxgb3_main: fix a missing-check bug
In cxgb_extension_ioctl(), the command of the ioctl is firstly copied from
the user-space buffer 'useraddr' to 'cmd' and checked through the
switch statement. If the command is not as expected, an error code
EOPNOTSUPP is returned. In the following execution, i.e., the cases of the
switch statement, the whole buffer of 'useraddr' is copied again to a
specific data structure, according to what kind of command is requested.
However, after the second copy, there is no re-check on the newly-copied
command. Given that the buffer 'useraddr' is in the user space, a malicious
user can race to change the command between the two copies. By doing so,
the attacker can supply malicious data to the kernel and cause undefined
behavior.
This patch adds a re-check in each case of the switch statement if there is
a second copy in that case, to re-check whether the command obtained in the
second copy is the same as the one in the first copy. If not, an error code
EINVAL is returned.
Signed-off-by: Wenwen Wang <wang6495@umn.edu> Signed-off-by: David S. Miller <davem@davemloft.net>
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) Fix to truncate input on ALU operations in 32 bit mode, from Jann.
2) Fixes for cgroup local storage to reject reserved flags on element
update and rejection of map allocation with zero-sized value, from Roman.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Jann Horn [Fri, 5 Oct 2018 16:17:59 +0000 (18:17 +0200)]
bpf: 32-bit RSH verification must truncate input before the ALU op
When I wrote commit 468f6eafa6c4 ("bpf: fix 32-bit ALU op verification"), I
assumed that, in order to emulate 64-bit arithmetic with 32-bit logic, it
is sufficient to just truncate the output to 32 bits; and so I just moved
the register size coercion that used to be at the start of the function to
the end of the function.
That assumption is true for almost every op, but not for 32-bit right
shifts, because those can propagate information towards the least
significant bit. Fix it by always truncating inputs for 32-bit ops to 32
bits.
Also get rid of the coerce_reg_to_size() after the ALU op, since that has
no effect.
Fixes: 468f6eafa6c4 ("bpf: fix 32-bit ALU op verification") Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Merge tag 'iommu-fixes-v4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Joerg writes:
"IOMMU Fix for Linux v4.19-rc6
One important fix:
- Fix a memory leak with AMD IOMMU when SME is active and a VM
has assigned devices. In that case the complete guest memory
will be leaked without this fix."
* tag 'iommu-fixes-v4.19-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Clear memory encryption mask from physical address
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Paolo writes:
"KVM changes for 4.19-rc7
x86 and PPC bugfixes, mostly introduced in 4.19-rc1."
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
kvm: nVMX: fix entry with pending interrupt if APICv is enabled
KVM: VMX: hide flexpriority from guest when disabled at the module level
KVM: VMX: check for existence of secondary exec controls before accessing
KVM: PPC: Book3S HV: Avoid crash from THP collapse during radix page fault
KVM: x86: fix L1TF's MMIO GFN calculation
tools/kvm_stat: cut down decimal places in update interval dialog
KVM: nVMX: Fix emulation of VM_ENTRY_LOAD_BNDCFGS
KVM: x86: Do not use kvm_x86_ops->mpx_supported() directly
KVM: nVMX: Do not expose MPX VMX controls when guest MPX disabled
KVM: x86: never trap MSR_KERNEL_GS_BASE
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Herbert writes:
"Crypto Fixes for 4.19
This push fixes the following issues:
- Out-of-bound stack access in qat.
- Illegal schedule in mxs-dcp.
- Memory corruption in chelsio.
- Incorrect pointer computation in caam."
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: qat - Fix KASAN stack-out-of-bounds bug in adf_probe()
crypto: mxs-dcp - Fix wait logic on chan threads
crypto: chelsio - Fix memory corruption in DMA Mapped buffers.
crypto: caam/jr - fix ablkcipher_edesc pointer arithmetic
Merge tag '4.19-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Steve writes:
"SMB3 fixes
four small SMB3 fixes: one for stable, the others to address a more
recent regression"
* tag '4.19-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
smb3: fix lease break problem introduced by compounding
cifs: only wake the thread for the very last PDU in a compound
cifs: add a warning if we try to to dequeue a deleted mid
smb2: fix missing files in root share directory listing
powerpc/numa: Skip onlining a offline node in kdump path
With commit 2ea626306810 ("powerpc/topology: Get topology for shared
processors at boot"), kdump kernel on shared LPAR may crash.
The necessary conditions are
- Shared LPAR with at least 2 nodes having memory and CPUs.
- Memory requirement for kdump kernel must be met by the first N-1
nodes where there are at least N nodes with memory and CPUs.
However a regular kernel with 4096M (2048 gets reserved for crash
kernel) boots properly.
Unlike regular kernels, which mark all available nodes as online,
kdump kernel only marks just enough nodes as online and marks the rest
as offline at boot. However kdump kernel boots with all available
CPUs. With Commit 2ea626306810 ("powerpc/topology: Get topology for
shared processors at boot"), all CPUs are onlined on their respective
nodes at boot time. try_online_node() tries to online the offline
nodes but fails as all needed subsystems are not yet initialized.
As part of fix, detect and skip early onlining of a offline node.
Fixes: 2ea626306810 ("powerpc/topology: Get topology for shared processors at boot") Reported-by: Pavithra Prakash <pavrampu@in.ibm.com> Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Tested-by: Hari Bathini <hbathini@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
powerpc: Don't print kernel instructions in show_user_instructions()
Recently we implemented show_user_instructions() which dumps the code
around the NIP when a user space process dies with an unhandled
signal. This was modelled on the x86 code, and we even went so far as
to implement the exact same bug, namely that if the user process
crashed with its NIP pointing into the kernel we will dump kernel text
to dmesg. eg:
Jarkko Nikula [Mon, 1 Oct 2018 11:49:05 +0000 (14:49 +0300)]
i2c: designware: Call i2c_dw_clk_rate() only when calculating timings
There are platforms which don't provide input clock rate but provide
I2C timing parameters. Commit 3bd4f277274b ("i2c: designware: Call
i2c_dw_clk_rate() only once in i2c_dw_init_master()") causes needless
warning during probe on those platforms since i2c_dw_clk_rate(), which
causes the warning when input clock is unknown, is called even when
there is no need to calculate timing parameters.
Fixes: 3bd4f277274b ("i2c: designware: Call i2c_dw_clk_rate() only once in i2c_dw_init_master()") Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: <stable@vger.kernel.org> # 4.19 Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Singh, Brijesh [Thu, 4 Oct 2018 21:40:23 +0000 (21:40 +0000)]
iommu/amd: Clear memory encryption mask from physical address
Boris Ostrovsky reported a memory leak with device passthrough when SME
is active.
The VFIO driver uses iommu_iova_to_phys() to get the physical address for
an iova. This physical address is later passed into vfio_unmap_unpin() to
unpin the memory. The vfio_unmap_unpin() uses pfn_valid() before unpinning
the memory. The pfn_valid() check was failing because encryption mask was
part of the physical address returned. This resulted in the memory not
being unpinned and therefore leaked after the guest terminates.
The memory encryption mask must be cleared from the physical address in
iommu_iova_to_phys().
Fixes: 2543a786aa25 ("iommu/amd: Allow the AMD IOMMU to work with memory encryption") Reported-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: <iommu@lists.linux-foundation.org> Cc: Borislav Petkov <bp@suse.de> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: kvm@vger.kernel.org Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: <stable@vger.kernel.org> # 4.14+ Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
When connecting SFP PHY to phylink use the detected interface.
Otherwise, the link fails to come up when the configured 'phy-mode'
differs from the SFP detected mode.
Move most of phylink_connect_phy() into __phylink_connect_phy(), and
leave phylink_connect_phy() as a wrapper. phylink_sfp_connect_phy() can
now pass the SFP detected PHY interface to __phylink_connect_phy().
This fixes 1GB SFP module link up on eth3 of the Macchiatobin board that
is configured in the DT to "2500base-x" phy-mode.
Fixes: 9525ae83959b6 ("phylink: add phylink infrastructure") Suggested-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: David S. Miller <davem@davemloft.net>
Davide Caratti [Wed, 3 Oct 2018 13:20:58 +0000 (15:20 +0200)]
be2net: don't flip hw_features when VXLANs are added/deleted
the be2net implementation of .ndo_tunnel_{add,del}() changes the value of
NETIF_F_GSO_UDP_TUNNEL bit in 'features' and 'hw_features', but it forgets
to call netdev_features_change(). Moreover, ethtool setting for that bit
can potentially be reverted after a tunnel is added or removed.
GSO already does software segmentation when 'hw_enc_features' is 0, even
if VXLAN offload is turned on. In addition, commit 096de2f83ebc ("benet:
stricter vxlan offloading check in be_features_check") avoids hardware
segmentation of non-VXLAN tunneled packets, or VXLAN packets having wrong
destination port. So, it's safe to avoid flipping the above feature on
addition/deletion of VXLAN tunnels.
Fixes: 630f4b70567f ("be2net: Export tunnel offloads only when a VxLAN tunnel is created") Signed-off-by: Davide Caratti <dcaratti@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Paolo Bonzini [Fri, 5 Oct 2018 07:39:53 +0000 (09:39 +0200)]
Merge tag 'kvm-ppc-fixes-4.19-3' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into kvm-master
Third set of PPC KVM fixes for 4.19
One patch here, fixing a potential host crash introduced (or at least
exacerbated) by a previous fix for corruption relating to radix guest
page faults and THP operations.
Jianfeng Tan [Sat, 29 Sep 2018 15:41:27 +0000 (15:41 +0000)]
net/packet: fix packet drop as of virtio gso
When we use raw socket as the vhost backend, a packet from virito with
gso offloading information, cannot be sent out in later validaton at
xmit path, as we did not set correct skb->protocol which is further used
for looking up the gso function.
To fix this, we set this field according to virito hdr information.
Fixes: e858fae2b0b8f4 ("virtio_net: use common code for virtio_net_hdr and skb GSO conversion") Signed-off-by: Jianfeng Tan <jianfeng.tan@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
net: dsa: b53: Keep CPU port as tagged in all VLANs
Commit c499696e7901 ("net: dsa: b53: Stop using dev->cpu_port
incorrectly") was a bit too trigger happy in removing the CPU port from
the VLAN membership because we rely on DSA to program the CPU port VLAN,
which it does, except it does not bother itself with tagged/untagged and
just usese untagged.
Having the CPU port "follow" the user ports tagged/untagged is not great
and does not allow for properly differentiating, so keep the CPU port
tagged in all VLANs.
Reported-by: Gerhard Wiesinger <lists@wiesinger.com> Fixes: c499696e7901 ("net: dsa: b53: Stop using dev->cpu_port incorrectly") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Fri, 5 Oct 2018 04:41:16 +0000 (21:41 -0700)]
Merge branch 'bnxt_en-fixes'
Michael Chan says:
====================
bnxt_en: Misc. bug fixes.
4 small bug fixes related to setting firmware message enables bits, possible
memory leak when probe fails, and ring accouting when RDMA driver is loaded.
Please queue these for -stable as well. Thanks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
bnxt_en: get the reduced max_irqs by the ones used by RDMA
When getting the max rings supported, get the reduced max_irqs
by the ones used by RDMA.
If the number MSIX is the limiting factor, this bug may cause the
max ring count to be higher than it should be when RDMA driver is
loaded and may result in ring allocation failures.
Fixes: 30f529473ec9 ("bnxt_en: Do not modify max IRQ count after RDMA driver requests/frees IRQs.") Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Venkat Duvvuru [Fri, 5 Oct 2018 04:26:02 +0000 (00:26 -0400)]
bnxt_en: free hwrm resources, if driver probe fails.
When the driver probe fails, all the resources that were allocated prior
to the failure must be freed. However, hwrm dma response memory is not
getting freed.
This patch fixes the problem described above.
Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.") Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
bnxt_en: Fix enables field in HWRM_QUEUE_COS2BW_CFG request
In HWRM_QUEUE_COS2BW_CFG request, enables field should have the bits
set only for the queue ids which are having the valid parameters.
This causes firmware to return error when the TC to hardware CoS queue
mapping is not 1:1 during DCBNL ETS setup.
Fixes: 2e8ef77ee0ff ("bnxt_en: Add TC to hardware QoS queue mapping logic.") Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com> Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Michael Chan [Fri, 5 Oct 2018 04:26:00 +0000 (00:26 -0400)]
bnxt_en: Fix VNIC reservations on the PF.
The enables bit for VNIC was set wrong when calling the HWRM_FUNC_CFG
firmware call to reserve VNICs. This has the effect that the firmware
will keep a large number of VNICs for the PF, and having very few for
VFs. DPDK driver running on the VFs, which requires more VNICs, may not
work properly as a result.
Fixes: 674f50a5b026 ("bnxt_en: Implement new method to reserve rings.") Signed-off-by: Michael Chan <michael.chan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>