Jaegeuk Kim [Tue, 31 Jul 2018 16:09:01 +0000 (09:09 -0700)]
f2fs: avoid f2fs_bug_on() in cp_error case
There is a subtle race condition to invoke f2fs_bug_on() in shutdown tests. I've
confirmed that the last checkpoint is preserved in consistent state, so it'd be
fine to just return error at this moment.
f2fs: fix to active page in lru list for read path
If config CONFIG_F2FS_FAULT_INJECTION is on, for both read or write path
we will call find_lock_page() to get the page, but for read path, it
missed to passing FGP_ACCESSED to allocator to active the page in LRU
list, result in being reclaimed in advance incorrectly, fix it.
f2fs: don't keep meta pages used for block migration
For migration of encrypted inode's block, we load data of encrypted block
into meta inode's page cache, after checkpoint, those all intermediate
pages should be clean, and no one will read them again, so let's just
release them for more memory.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
f2fs: quota: do not mount as RDWR without QUOTA if quota feature enabled
If quota feature is enabled, quota is on by default. However, if
CONFIG_QUOTA is not built in kernel, dquot entries will not get updated,
which leads to quota inconsistency.
f2fs: quota: decrease the lock granularity of statfs_project
According to fs/quota/dquot.c, `dq_data_lock' protects mem_dqinfo
structures and modifications of dquot pointers in the inode, and
`dquot->dq_dqb_lock' protects data from dq_dqb.
We should use dquot->dq_dqb_lock in statfs_project instead of
dq_dat_lock.
Yunlong Song [Mon, 23 Jul 2018 14:10:22 +0000 (22:10 +0800)]
f2fs: add proc entry to show victim_secmap bitmap
This patch adds a new proc entry to show victim_secmap information in
more detail, which is very helpful to know the get_victim candidate
status clearly, and helpful to debug problems (e.g., some sections can
not gc all of its blocks, since some blocks belong to atomic file,
leaving victim_secmap with section bit setting, in extrem case, this
will lead all bytes of victim_secmap setting with 0xff).
Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Fsyncer will wait on all dnode pages of regular writeback before flushing,
if there are async dnode pages blocked by IO scheduler, it may decrease
fsync's performance.
In this patch, we choose to let f2fs_balance_fs_bg() to trigger checkpoint
to flush these dnode pages of regular, so async IO of dnode page can be
elimitnated, making fsyncer only need to wait for sync IO.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Yunlong Song [Thu, 19 Jul 2018 12:58:15 +0000 (20:58 +0800)]
f2fs: issue discard align to section in LFS mode
For the case when sbi->segs_per_sec > 1 with lfs mode, take
section:segment = 5 for example, if the section prefree_map is
...previous section | current section (1 1 0 1 1) | next section...,
then the start = x, end = x + 1, after start = start_segno +
sbi->segs_per_sec, start = x + 5, then it will skip x + 3 and x + 4, but
their bitmap is still set, which will cause duplicated
f2fs_issue_discard of this same section in the next write_checkpoint:
round 1: section bitmap : 1 1 1 1 1, all valid, prefree_map: 0 0 0 0 0
then rm data block NO.2, block NO.2 becomes invalid, prefree_map: 0 0 1 0 0
write_checkpoint: section bitmap: 1 1 0 1 1, prefree_map: 0 0 0 0 0,
prefree of NO.2 is cleared, and no discard issued
round 2: rm data block NO.0, NO.1, NO.3, NO.4
all invalid, but prefree bit of NO.2 is set and cleared in round 1, then
prefree_map: 1 1 0 1 1
write_checkpoint: section bitmap: 0 0 0 0 0, prefree_map: 0 0 0 1 1, no
valid blocks of this section, so discard issued, but this time prefree
bit of NO.3 and NO.4 is skipped due to start = start_segno + sbi->segs_per_sec;
round 3:
write_checkpoint: section bitmap: 0 0 0 0 0, prefree_map: 0 0 0 1 1 ->
0 0 0 0 0, no valid blocks of this section, so discard issued,
this time prefree bit of NO.3 and NO.4 is cleared, but the discard of
this section is sent again...
To fix this problem, we can align the start and end value to section
boundary for fstrim and real-time discard operation, and decide to issue
discard only when the whole section is invalid, which can issue discard
aligned to section size as much as possible and avoid redundant discard.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Jaegeuk Kim [Fri, 27 Jul 2018 09:15:11 +0000 (18:15 +0900)]
f2fs: don't allow any writes on aborted atomic writes
In order to prevent abusing atomic writes by abnormal users, we've added a
threshold, 20% over memory footprint, which disallows further atomic writes.
Previously, however, SQLite doesn't know the files became normal, so that
it could write stale data and commit on revoked normal database file.
Once f2fs detects such the abnormal behavior, this patch tries to avoid further
writes in write_begin().
Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In order to give advise to f2fs to recognize hot/cold file, it is possible
that we can set specific bit in inode.i_advise through setxattr(), but
there are several bits which are used internally, such as encrypt_bit,
keep_size_bit, they should never be changed through setxattr().
So that this patch 1) adds FADVISE_MODIFIABLE_BITS to filter modifiable
bits user given, 2) supports to clear {hot,cold}_file bits.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
If inode.i_extra_isize was fuzzed to an abnormal value, when
calculating inline data size, the result will overflow, result
in accessing invalid memory area when operating inline data.
Let's do sanity check with i_extra_isize during inode loading
for fixing.
int main(int argc, char *argv[]) {
activity(argv[1]);
return 0;
}
- Kernel message
Umount the image will leave the following message
[ 2910.995489] F2FS-fs (loop0): Mounted with checkpoint version = 2
[ 2918.416465] ==================================================================
[ 2918.416807] BUG: KASAN: slab-out-of-bounds in f2fs_iget+0xcb9/0x1a80
[ 2918.417009] Read of size 4 at addr ffff88018efc2068 by task a.out/1229
- Location
https://elixir.bootlin.com/linux/v4.18-rc3/source/fs/f2fs/inline.c#L78
memset(addr + from, 0, MAX_INLINE_DATA(inode) - from);
Here the length can be negative.
Yunlong Song [Thu, 12 Jul 2018 15:09:28 +0000 (23:09 +0800)]
f2fs: blk_finish_plug of submit_bio in lfs mode
Expand the blk_finish_plug action from blkzoned to normal lfs mode,
since plug will cause the out-of-order IO submission, which is not
friendly to flash in lfs mode.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Yunlong Song [Thu, 12 Jul 2018 15:09:26 +0000 (23:09 +0800)]
f2fs: do not set free of current section
For the case when sbi->segs_per_sec > 1, take section:segment = 5 for
example, if segment 1 is just used and allocate new segment 2, and the
blocks of segment 1 is invalidated, at this time, the previous code will
use __set_test_and_free to free the free_secmap and free_sections++,
this is not correct since it is still a current section, so fix it.
Signed-off-by: Yunlong Song <yunlong.song@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Daniel Rosenberg [Tue, 10 Jul 2018 03:32:42 +0000 (20:32 -0700)]
f2fs: Keep alloc_valid_block_count in sync
If we attempt to request more blocks than we have room for, we try to
instead request as much as we can, however, alloc_valid_block_count
is not decremented to match the new value, allowing it to drift higher
until the next checkpoint. This always decrements it when the requested
amount cannot be fulfilled.
Signed-off-by: Daniel Rosenberg <drosen@google.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
For small granularity discard which size is smaller than 64KB, if we
issue those kind of discards orderly by size, their IOs will be spread
into entire logical address, so that in FTL, L2P table will be updated
randomly, result bad wear rate in the table.
In this patch, we choose to issue small discard by LBA order, by this
way, we can expect that L2P table updates from adjacent discard IOs can
be merged in the cache, so it can reduce lifetime wearing of flash.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
f2fs: stop issuing discard immediately if there is queued IO
For background discard policy, even if there is queued user IO, still
we will check max_requests times for next discard entry, it is unneeded,
let's just stop this round submission immediately.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Randy Dunlap [Sat, 7 Jul 2018 03:50:57 +0000 (20:50 -0700)]
f2fs: fix defined but not used build warnings
Fix build warnings in f2fs when CONFIG_PROC_FS is not enabled
by marking the unused functions as __maybe_unused.
../fs/f2fs/sysfs.c:519:12: warning: 'segment_info_seq_show' defined but not used [-Wunused-function]
../fs/f2fs/sysfs.c:546:12: warning: 'segment_bits_seq_show' defined but not used [-Wunused-function]
../fs/f2fs/sysfs.c:570:12: warning: 'iostat_info_seq_show' defined but not used [-Wunused-function]
Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Chao Yu <yuchao0@huawei.com> Cc: linux-f2fs-devel@lists.sourceforge.net Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
f2fs is focused on flash based storage, so let's enable real-time
discard by default, if user don't want to enable it, 'nodiscard'
mount option should be used on mount.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Below dmesg was printed when testing generic/388 of fstest:
F2FS-fs (zram1): find_fsync_dnodes: detect looped node chain, blkaddr:526615, next:526616
F2FS-fs (zram1): Cannot recover all fsync data errno=-22
F2FS-fs (zram1): Mounted with checkpoint version = 22300d0e
F2FS-fs (zram1): find_fsync_dnodes: detect looped node chain, blkaddr:526615, next:526616
F2FS-fs (zram1): Cannot recover all fsync data errno=-22
The reason is that we initialize free_blocks with free blocks of
filesystem, so if filesystem is full, free_blocks can be zero,
below condition will be true, so that, it will fail recovery.
if (++loop_cnt >= free_blocks ||
blkaddr == next_blkaddr_of_node(page))
To fix this issue, initialize free_blocks with correct value which
includes over-privision blocks.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
f2fs: fix to skip GC if type in SSA and SIT is inconsistent
If segment type in SSA and SIT is inconsistent, we will encounter below
BUG_ON during GC, to avoid this panic, let's just skip doing GC on such
segment.
The bug is triggered with image reported in below link:
f2fs: try grabbing node page lock aggressively in sync scenario
In synchronous scenario, like in checkpoint(), we are going to flush
dirty node pages to device synchronously, we can easily failed
writebacking node page due to trylock_page() failure, especially in
condition of intensive lock competition, which can cause long latency
of checkpoint(). So let's use lock_page() in synchronous scenario to
avoid this issue.
Signed-off-by: Yunlei He <heyunlei@huawei.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
fs/f2fs/namei.c: In function 'f2fs_update_extension_list':
fs/f2fs/namei.c:257:3: warning:
'strncpy' output truncated before terminating nul copying
as many bytes from a string as its length
fs/f2fs/namei.c:249:3: warning:
'strncpy' output truncated before terminating nul copying
as many bytes from a string as its length
Using strncpy() is indeed less than perfect since the length of data to
be copied has already been determined with strlen(). Replace strncpy()
with memcpy() to address the warning and optimize the code a little.
Chao Yu [Sat, 30 Jun 2018 10:13:40 +0000 (18:13 +0800)]
f2fs: fix to do sanity check with reserved blkaddr of inline inode
As Wen Xu reported in bugzilla, after image was injected with random data
by fuzzing, inline inode would contain invalid reserved blkaddr, then
during inline conversion, we will encounter illegal memory accessing
reported by KASAN, the root cause of this is when writing out converted
inline page, we will use invalid reserved blkaddr to update sit bitmap,
result in accessing memory beyond sit bitmap boundary.
In order to fix this issue, let's do sanity check with reserved block
address of inline inode to avoid above condition.
Chao Yu [Mon, 25 Jun 2018 15:29:49 +0000 (23:29 +0800)]
f2fs: fix to do sanity check with extra_attr feature
If FI_EXTRA_ATTR is set in inode by fuzzing, inode.i_addr[0] will be
parsed as inode.i_extra_isize, then in __recover_inline_status, inline
data address will beyond boundary of page, result in accessing invalid
memory.
So in this condition, during reading inode page, let's do sanity check
with EXTRA_ATTR feature of fs and extra_attr bit of inode, if they're
inconsistent, deny to load this inode.
- Overview
Out-of-bound access in f2fs_iget() when mounting a corrupted f2fs image
- Reproduce
The following message will be got in KASAN build of 4.18 upstream kernel.
[ 819.392227] ==================================================================
[ 819.393901] BUG: KASAN: slab-out-of-bounds in f2fs_iget+0x736/0x1530
[ 819.395329] Read of size 4 at addr ffff8801f099c968 by task mount/1292
Chao Yu [Mon, 25 Jun 2018 12:33:24 +0000 (20:33 +0800)]
f2fs: fix to correct return value of f2fs_trim_fs
We should account trimmed block number from __wait_all_discard_cmd
in __issue_discard_cmd_range, otherwise trimmed blocks returned
by f2fs_trim_fs will be wrong, this patch fixes it.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Chao Yu [Sat, 23 Jun 2018 03:25:19 +0000 (11:25 +0800)]
f2fs: fix to do sanity check with {sit,nat}_ver_bitmap_bytesize
This patch adds to do sanity check with {sit,nat}_ver_bitmap_bytesize
during mount, in order to avoid accessing across cache boundary with
this abnormal bitmap size.
- Overview
buffer overrun in build_sit_info() when mounting a crafted f2fs image
If secs_per_zone is corrupted due to fuzzing test, it will cause divide
zero operation when using GET_ZONE_FROM_SEG macro, so we should do more
sanity check with secs_per_zone during mount to avoid this issue.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Chao Yu [Fri, 22 Jun 2018 08:06:59 +0000 (16:06 +0800)]
f2fs: disable f2fs_check_rb_tree_consistence
If there is millions of discard entries cached in rb tree, each
sanity check of it can cause very long latency as held cmd_lock
blocking other lock grabbers.
In other aspect, we have enabled the check very long time, as
we see, there is no such inconsistent condition caused by bugs.
But still we do not choose to kill it directly, instead, adding
an flag to disable the check now, if there is related code change,
we can reuse it to detect bugs.
Signed-off-by: Yunlei He <heyunlei@huawei.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Jaegeuk Kim [Thu, 21 Jun 2018 18:29:43 +0000 (11:29 -0700)]
f2fs: assign REQ_RAHEAD to bio for ->readpages
As Jens reported, we'd better assign REQ_RAHEAD to bio by the fact that
->readpages is called only from read-ahead.
In Documentation/filesystems/vfs.txt,
readpages: called by the VM to read pages associated with the address_space
object. This is essentially just a vector version of
readpage. Instead of just one page, several pages are
requested.
readpages is only used for read-ahead, so read errors are
ignored. If anything goes wrong, feel free to give up.
Yunlei He [Thu, 21 Jun 2018 06:49:06 +0000 (14:49 +0800)]
f2fs: fix a hungtask problem caused by congestion_wait
This patch fix hungtask problem which can be reproduced as follow:
Thread 0~3:
while true
do
touch /xxx/test/file_xxx
done
Thread 4 write a new checkpoint every three seconds.
In the meantime, fio start 16 threads for randwrite.
With my debug info, cycles num will exceed 1000 in function
f2fs_sync_dirty_inodes, and most of cycle will be dropped
into congestion_wait() and sleep more than 20ms. Cycles num
reduced to 3 with this patch.
Signed-off-by: Yunlei He <heyunlei@huawei.com> Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Chao Yu [Fri, 15 Jun 2018 06:45:57 +0000 (14:45 +0800)]
f2fs: fix to propagate return value of scan_nat_page()
As Anatoly Trosinenko reported in bugzilla:
How to reproduce:
1. Compile the 73fcb1a370c76 version of the kernel using the config attached
2. Unpack and mount the attached filesystem image as F2FS
3. The kernel will BUG() on mount (BUGs are explicitly enabled in config)
During loading NAT entries, we will do sanity check, once the entry info
is corrupted, it will cause BUG_ON directly to protect user data from
being overwrited.
In this case, it will be better to just return failure on mount() instead
of panic, so that user can get hint from kmsg and try fsck for recovery
immediately rather than after an abnormal reboot.
readdir_ra is sysfs configuration instead of mount option, so it should
not be initialized in default_options(), otherwise after remount, it can
be reset to be enabled which may not as user wish, so let's move it to
f2fs_tuning_parameters().
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Chao Yu [Wed, 6 Jun 2018 15:55:01 +0000 (23:55 +0800)]
f2fs: don't acquire orphan ino during recovery
During orphan inode recovery, checkpoint should never succeed due to
SBI_POR_DOING flag, so we don't need acquire orphan ino which only be
used by checkpoint.
Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
"A few more changes for v4.18:
- wire up the two new system calls io_pgetevents and rseq
- fix a register corruption in the expolines code for machines
without EXRL
- drastically reduce the memory utilization of the dasd driver
- fix reference counting for KVM page table pages"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390: wire up rseq system call
s390: wire up io_pgetevents system call
s390/mm: fix refcount usage for 4K pgste
s390/dasd: reduce the default queue depth and nr of hardware queues
s390: Correct register corruption in critical section cleanup
Merge tag 'drm-fixes-2018-07-06' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"This is the drm fixes for rc4.
It's a bit larger than I'd like but the exynos cleanups are pretty
mechanical, and I'd rather have them in sooner rather than later so we
can avoid too much conflicts around them. The non-mechanincal exynos
changes are mostly fixes for new feature recently introduced.
Apart from the exynos updates, we have:
i915:
- GVT and GGTT mapping fixes
amdgpu:
- fix HDMI2.0 4K@60 Hz regression
- Hotplug fixes for dual-GPU laptops to make power management better
- misc vega12 bios fixes, a race fix and some typos.
sii8620 bridge:
- small fixes around mode setting
core:
- use kvzalloc to allocate blob property memory"
* tag 'drm-fixes-2018-07-06' of git://anongit.freedesktop.org/drm/drm: (34 commits)
drm/amd/display: add a check for display depth validity
drm/amd/display: adding ycbcr420 pixel encoding for hdmi
drm/udl: fix display corruption of the last line
drm/bridge/sii8620: Fix link mode selection
drm/bridge/sii8620: Fix display of packed pixel modes
drm/bridge/sii8620: Send AVI infoframe in all MHL versions
drm/amdgpu: fix user fence write race condition
drm/i915: Try GGTT mmapping whole object as partial
drm/amdgpu/pm: fix display count in non-DC path
drm/amdgpu: fix swapped emit_ib_size in vce3
drm: Use kvzalloc for allocating blob property memory
drm/i915/gvt: changed DDI mode emulation type
drm/i915/gvt: fix a bug of partially write ggtt enties
drm/exynos: Replace drm_dev_unref with drm_dev_put
drm/exynos: Replace drm_gem_object_unreference_unlocked with put function
drm/exynos: Replace drm_framebuffer_{un/reference} with put,get functions
drm/exynos: ipp: use correct enum type
drm/exynos: decon5433: Fix WINCONx reset value
drm/exynos: decon5433: Fix per-plane global alpha for XRGB modes
drm/exynos: fimc: Use real buffer width for configuring the hardware
...
Merge tag 'trace-v4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes and cleanups from Steven Rostedt:
"While cleaning out my INBOX, I found a few patches that were lost in
the noise. These are minor bug fixes and clean ups. Those include:
- avoid a string overflow
- code that didn't match the comment (but should)
- a small code optimization (use of a conditional)
- quiet printf warnings
- nuke unused code
- fix function graph interrupt annotation"
* tag 'trace-v4.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Fix missing return symbol in function_graph output
ftrace: Nuke clear_ftrace_function
tracing: Use __printf markup to silence compiler
tracing: Optimize trace_buffer_iter() logic
tracing: Make create_filter() code match the comments
tracing: Avoid string overflow
Dave Airlie [Fri, 6 Jul 2018 00:46:58 +0000 (10:46 +1000)]
Merge tag 'exynos-drm-fixes-for-v4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes
Fixups
- Fix several problems to IPPv2 merged to mainline recentely.
. An align problem of width size that IPP driver incorrectly
calculated the real buffer size.
. Horizontal and vertical flip problem.
. Per-plane global alpha for XRGB modes.
. Incorrect variant of the YUV modes.
- Fix plane overlapping problem.
. The stange order of overlapping planes on XRGB modes
by setting global alpha value to maximum value.
Cleanup
- Rename a enum type, drm_ipp_size_id, to one specific to Exynos,
drm_exynos_ipp_limit_type.
- Replace {un/reference} with {put,get} functions.
. it replaces several reference/unreference functions with Linux
kernel nameing standard.
Dave Airlie [Fri, 6 Jul 2018 00:44:35 +0000 (10:44 +1000)]
Merge branch 'drm-fixes-4.18' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
- Fix an HDMI 2.0 4k@60 regression
- Hotplug fixes for PX/HG laptops
- Fixes for vbios changes in vega12
- Fix a race in the user fence code
- Fix a couple of misc typos
sgid directories have special semantics, making newly created files in
the directory belong to the group of the directory, and newly created
subdirectories will also become sgid. This is historically used for
group-shared directories.
But group directories writable by non-group members should not imply
that such non-group members can magically join the group, so make sure
to clear the sgid bit on non-directories for non-members (but remember
that sgid without group execute means "mandatory locking", just to
confuse things even more).
Reported-by: Jann Horn <jannh@google.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It turns out that systemd has a bug: it wants to load the autofs module
early because of some initialization ordering with udev, and it doesn't
do that correctly. Everywhere else it does the proper "look up module
name" that does the proper alias resolution, but in that early code, it
just uses a hardcoded "autofs4" for the module name.
The result of that is that as of commit a2225d931f75 ("autofs: remove
left-over autofs4 stubs"), you get
systemd[1]: Failed to insert module 'autofs4': No such file or directory
in the system logs, and a lack of module loading. All this despite the
fact that we had very clearly marked 'autofs4' as an alias for this
module.
What's so ridiculous about this is that literally everything else does
the module alias handling correctly, including really old versions of
systemd (that just used 'modprobe' to do this), and even all the other
systemd module loading code.
Only that special systemd early module load code is broken, hardcoding
the module names for not just 'autofs4', but also "ipv6", "unix",
"ip_tables" and "virtio_rng". Very annoying.
Instead of creating an _additional_ separate compatibility 'autofs4'
module, just rely on the fact that everybody else gets this right, and
just call the module 'autofs4' for compatibility reasons, with 'autofs'
as the alias name.
That will allow the systemd people to fix their bugs, adding the proper
alias handling, and maybe even fix the name of the module to be just
"autofs" (so that they can _test_ the alias handling). And eventually,
we can revert this silly compatibility hack.
Merge tag 'acpi-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These fix a recent ACPICA regression, fix a battery driver regression
introduced during the 4.17 cycle and fix up the recently added support
for the PPTT ACPI table.
Specifics:
- Revert part of a recent ACPICA regression fix that added leading
newlines to ACPICA error messages and made the kernel log look
broken (Rafael Wysocki).
- Fix an ACPI battery driver regression introduced during the 4.17
cycle due to incorrect error handling that made Thinkpad 13 laptops
crash on boot (Jouke Witteveen).
- Fix up the recently added PPTT ACPI table support by covering the
case when a PPTT structure represents a processors group correctly
(Sudeep Holla)"
* tag 'acpi-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI / battery: Safe unregistering of hooks
ACPI / PPTT: use ACPI ID whenever ACPI_PPTT_ACPI_PROCESSOR_ID_VALID is set
ACPICA: Drop leading newlines from error messages
Merge tag 'pm-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a PCI power management regression introduced during the 4.17
cycle and fix up the recently added support for devices in multiple
power domains.
Specifics:
- Resume parallel PCI (non-PCIe) bridges on suspend-to-RAM (ACP S3)
to avoid confusing the platform firmware which started to happen
after a core power management regression fix that went in during
the 4.17 cycle (Rafael Wysocki).
- Fix up the recently added support for devices in multiple power
domains by avoiding to power up the entire domain unnecessarily
when attaching a device to it (Ulf Hansson)"
* tag 'pm-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM / Domains: Don't power on at attach for the multi PM domain case
PCI / ACPI / PM: Resume bridges w/o drivers on suspend-to-RAM
Merge tag 'riscv-for-linus-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux
Pull RISC-V fixes from Palmer Dabbelt:
"This contains a handful of fixes for the RISC-V port:
- A fix to R_RISCV_ADD32/R_RISCV_SUB32 relocations that allows
modules that use these to load correctly.
- The removal of of_platform_populate(), which is obselete.
- The removal of irq-riscv-intc.h, which is obselete.
- A fix to PTRACE_SETREGSET.
- Fixes that allow the RV32I kernel to build (at least for Zong, I've
got another patch on the mailing list that's necessary on my setup :)).
I've just given these a defconfig build test"
* tag 'riscv-for-linus-4.18-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/palmer/riscv-linux:
RISC-V: Fix PTRACE_SETREGSET bug.
RISC-V: Don't include irq-riscv-intc.h
riscv: remove unnecessary of_platform_populate call
RISC-V: fix R_RISCV_ADD32/R_RISCV_SUB32 relocations
RISC-V: Change variable type for 32-bit compatible
RISC-V: Add definiion of extract symbol's index and type for 32-bit
RISC-V: Select GENERIC_UCMPDI2 on RV32I
RISC-V: Add conditional macro for zone of DMA32
drm/amd/display: add a check for display depth validity
[why]
HDMI 2.0 fails to validate 4K@60 timing with 10 bpc
[how]
Adding a helper function that would verify if the display depth
assigned would pass a bandwidth validation.
Drop the display depth by one level till calculated pixel clk
is lower than maximum TMDS clk.
Bugzilla: https://bugs.freedesktop.org/106959
Tested-by: Mike Lothian <mike@fireburn.co.uk> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Mikita Lipski <mikita.lipski@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: adding ycbcr420 pixel encoding for hdmi
[why]
HDMI EDID's VSDB contains spectial timings for specifically
YCbCr 4:2:0 colour space. In those cases we need to verify
if the mode provided is one of the special ones has to use
YCbCr 4:2:0 pixel encoding for display info.
[how]
Verify if the mode is using specific ycbcr420 colour space with
the help of DRM helper function and assign the mode to use
ycbcr420 pixel encoding.
Tested-by: Mike Lothian <mike@fireburn.co.uk> Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Mikita Lipski <mikita.lipski@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Mikulas Patocka [Sun, 3 Jun 2018 14:40:54 +0000 (16:40 +0200)]
drm/udl: fix display corruption of the last line
The displaylink hardware has such a peculiarity that it doesn't render a
command until next command is received. This produces occasional
corruption, such as when setting 22x11 font on the console, only the first
line of the cursor will be blinking if the cursor is located at some
specific columns.
When we end up with a repeating pixel, the driver has a bug that it leaves
one uninitialized byte after the command (and this byte is enough to flush
the command and render it - thus it fixes the screen corruption), however
whe we end up with a non-repeating pixel, there is no byte appended and
this results in temporary screen corruption.
This patch fixes the screen corruption by always appending a byte 0xAF at
the end of URB. It also removes the uninitialized byte.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
These patches for building 32-bit RISC-V kernel.
- Fix the compile errors and warnings on RV32I.
- Fix some incompatible problem on RV32I.
- Add format.h for compatible of print format.
The fixed width integer types format for Elf_Addr will move to
generic header by another patch. For now, there are some warning
about unexpected argument of type on RV32I.
Change in v1:
- Fix some error in v1
- Remove implementation of fixed width integer types format for Elf_Addr.
Palmer Dabbelt [Fri, 22 Jun 2018 22:46:28 +0000 (15:46 -0700)]
RISC-V: Don't include irq-riscv-intc.h
This file has never existed in the upstream kernel, but it's guarded by
an #ifdef that's also never existed in the upstream kernel. As a part
of our interrupt controller refactoring this header is no longer
necessary, but this reference managed to sneak in anyway.
The DT core will call of_platform_default_populate, so it is not
necessary for arch specific code to call it unless there are custom
match entries, auxdata or parent device. Neither of those apply here, so
remove the call.
Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: linux-riscv@lists.infradead.org Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Maciej Purski [Thu, 28 Jun 2018 16:44:02 +0000 (18:44 +0200)]
drm/bridge/sii8620: Fix display of packed pixel modes
Current implementation does not guarantee packed pixel modes working
with every dongle. There are some dongles, which require selecting
the output mode explicitly.
Write proper values to registers in packed_pixel mode, based on how it
is done in vendor's code. Select output color space: RGB
(no packed pixel) or YCBCR422 (packed pixel).
Maciej Purski [Thu, 28 Jun 2018 16:44:01 +0000 (18:44 +0200)]
drm/bridge/sii8620: Send AVI infoframe in all MHL versions
Currently AVI infoframe is sent only in MHL3. However, some MHL2 dongles
need AVI infoframe to work correctly in either packed pixel mode or
non-packed pixel mode.
Send AVI infoframe in set_infoframes() in every case. Create an
infoframe using drm_hdmi_infoframe_from_display_mode() instead of
manually filling each infoframe structure's field.
A hooking API was implemented for 4.17 in fa93854f7a7ed63d followed
by hooks for Thinkpad laptops in 2801b9683f740012. The Thinkpad
drivers did not support the Thinkpad 13 and the hooking API crashes
on unsupported batteries by altering a list of hooks during unsafe
iteration. Thus, Thinkpad 13 laptops could no longer boot.
Additionally, a lock was kept in place and debugging information was
printed out of order.
Fixes: fa93854f7a7e (battery: Add the battery hooking API) Cc: 4.17+ <stable@vger.kernel.org> # 4.17+ Signed-off-by: Jouke Witteveen <j.witteveen@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Nicolai Hähnle [Fri, 29 Jun 2018 11:23:25 +0000 (13:23 +0200)]
drm/amdgpu: fix user fence write race condition
The buffer object backing the user fence is reserved using the non-user
fence, i.e., as soon as the non-user fence is signaled, the user fence
buffer object can be moved or even destroyed.
Therefore, emit the user fence first.
Both fences have the same cache invalidation behavior, so this should
have no user-visible effect.
Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org