Sparse reports warnings at fsnotify_prepare_user_wait()
and at fsnotify_finish_user_wait()
warning: context imbalance in fsnotify_finish_user_wait()
- wrong count at exit
warning: context imbalance in fsnotify_prepare_user_wait()
- unexpected unlock
The root cause is the missing annotation at fsnotify_finish_user_wait()
and at fsnotify_prepare_user_wait()
fsnotify_prepare_user_wait() has an extra annotation __release()
that only tell Sparse and not GCC to shutdown the warning
Add the missing __acquires(&fsnotify_mark_srcu) annotation
Add the missing __releases(&fsnotify_mark_srcu) annotation
Add the __release(&fsnotify_mark_srcu) annotation.
Link: https://lore.kernel.org/r/20200413214240.15245-1-jbi.octave@gmail.com
Signed-off-by: Jules Irenge <jbi.octave@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
-----BEGIN PGP SIGNATURE-----
iQFHBAABCAAxFiEEIbPD0id6easf0xsudhRwX5BBoF4FAl6ViNsTHHdlaS5saXVA
a2VybmVsLm9yZwAKCRB2FHBfkEGgXuXIB/4nuYRCt4d/XaeHF6dCWU45ThG+tNs7
p/OnBPZmknI0SnZ4uR/XW5caHEFj7g9ndYh+M1afZ/zKdsc+syMSDT5XhuhC/GKV
fQRW0qO8N+IAqXbLzJxyBg6fH2anwfe3w2uy2cKDEZk6d4FD5atTWhRY6R4ISq0l
g7pUyvQN1q+G6KH2snmOaZL8mybFkbHrmwtAZzcjzdzqasdLFiQB8EEFkONG66t9
HeNTyUF0mnbGBIePQLSZSHLj5p4yHG/9pa3jgqO5dsmIdsBvoaVNqEi3pCm1s/5n
BH9FWn6fTwpcKvtF385yzBiFFlzBVgXbetxuSmxxOkWW4P+db5B/GL2Y
=fjSF
-----END PGP SIGNATURE-----
Merge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
Pull hyperv fixes from Wei Liu:
- a series from Tianyu Lan to fix crash reporting on Hyper-V
- three miscellaneous cleanup patches
* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
x86/Hyper-V: Report crash data in die() when panic_on_oops is set
x86/Hyper-V: Report crash register data when sysctl_record_panic_msg is not set
x86/Hyper-V: Report crash register data or kmsg before running crash kernel
x86/Hyper-V: Trigger crash enlightenment only once during system crash.
x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump
x86/Hyper-V: Unload vmbus channel in hv panic callback
x86: hyperv: report value of misc_features
hv_debugfs: Make hv_debug_root static
hv: hyperv_vmbus.h: Replace zero-length array with flexible-array member
-----BEGIN PGP SIGNATURE-----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=pkZ2
-----END PGP SIGNATURE-----
Merge tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"We have a few regressions and one fix for stable:
- revert fsync optimization
- fix lost i_size update
- fix a space accounting leak
- build fix, add back definition of a deprecated ioctl flag
- fix search condition for old roots in relocation"
* tag 'for-5.7-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: re-instantiate the removed BTRFS_SUBVOL_CREATE_ASYNC definition
btrfs: fix reclaim counter leak of space_info objects
btrfs: make full fsyncs always operate on the entire file again
btrfs: fix lost i_size update after cloning inline extent
btrfs: check commit root generation in should_ignore_root
-----BEGIN PGP SIGNATURE-----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=o13s
-----END PGP SIGNATURE-----
Merge tag 'afs-fixes-20200413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull AFS fixes from David Howells:
- Fix the decoding of fetched file status records so that the xdr
pointer is advanced under all circumstances.
- Fix the decoding of a fetched file status record that indicates an
inline abort (ie. an error) so that it sets the flag saying the
decoder stored the abort code.
- Fix the decoding of the result of the rename operation so that it
doesn't skip the decoding of the second fetched file status (ie. that
of the dest dir) in the case that the source and dest dirs were the
same as this causes the xdr pointer not to be advanced, leading to
incorrect decoding of subsequent parts of the reply.
- Fix the dump of a bad YFSFetchStatus record to dump the full length.
- Fix a race between local editing of directory contents and accessing
the dir for reading or d_revalidate by using the same lock in both.
- Fix afs_d_revalidate() to not accidentally reverse the version on a
dentry when it's meant to be bringing it forward.
* tag 'afs-fixes-20200413' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Fix afs_d_validate() to set the right directory version
afs: Fix race between post-modification dir edit and readdir/d_revalidate
afs: Fix length of dump of bad YFSFetchStatus record
afs: Fix rename operation status delivery
afs: Fix decoding of inline abort codes from version 1 status records
afs: Fix missing XDR advance in xdr_decode_{AFS,YFS}FSFetchStatus()
The cleanup in commit 630f289b71 ("asm-generic: make more
kernel-space headers mandatory") did not take into account the recently
added line for hardirq.h in commit acc45648b9 ("m68k: Switch to
asm-generic/hardirq.h"), leading to the following message during the
build:
scripts/Makefile.asm-generic:25: redundant generic-y found in arch/m68k/include/asm/Kbuild: hardirq.h
Fix this by dropping the now redundant line.
Fixes: 630f289b71 ("asm-generic: make more kernel-space headers mandatory")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If a dentry's version is somewhere between invalid_before and the current
directory version, we should be setting it forward to the current version,
not backwards to the invalid_before version. Note that we're only doing
this at all because dentry::d_fsdata isn't large enough on a 32-bit system.
Fix this by using a separate variable for invalid_before so that we don't
accidentally clobber the current dir version.
Fixes: a4ff7401fb ("afs: Keep track of invalid-before version for dentry coherency")
Signed-off-by: David Howells <dhowells@redhat.com>
AFS directories are retained locally as a structured file, with lookup
being effected by a local search of the file contents. When a modification
(such as mkdir) happens, the dir file content is modified locally rather
than redownloading the directory.
The directory contents are accessed in a number of ways, with a number of
different locks schemes:
(1) Download of contents - dvnode->validate_lock/write in afs_read_dir().
(2) Lookup and readdir - dvnode->validate_lock/read in afs_dir_iterate(),
downgrading from (1) if necessary.
(3) d_revalidate of child dentry - dvnode->validate_lock/read in
afs_do_lookup_one() downgrading from (1) if necessary.
(4) Edit of dir after modification - page locks on individual dir pages.
Unfortunately, because (4) uses different locking scheme to (1) - (3),
nothing protects against the page being scanned whilst the edit is
underway. Even download is not safe as it doesn't lock the pages - relying
instead on the validate_lock to serialise as a whole (the theory being that
directory contents are treated as a block and always downloaded as a
block).
Fix this by write-locking dvnode->validate_lock around the edits. Care
must be taken in the rename case as there may be two different dirs - but
they need not be locked at the same time. In any case, once the lock is
taken, the directory version must be rechecked, and the edit skipped if a
later version has been downloaded by revalidation (there can't have been
any local changes because the VFS holds the inode lock, but there can have
been remote changes).
Fixes: 63a4681ff3 ("afs: Locally edit directory data for mkdir/create/unlink/...")
Signed-off-by: David Howells <dhowells@redhat.com>
Fix the length of the dump of a bad YFSFetchStatus record. The function
was copied from the AFS version, but the YFS variant contains bigger fields
and extra information, so expand the dump to match.
Signed-off-by: David Howells <dhowells@redhat.com>
The afs_deliver_fs_rename() and yfs_deliver_fs_rename() functions both only
decode the second file status returned unless the parent directories are
different - unfortunately, this means that the xdr pointer isn't advanced
and the volsync record will be read incorrectly in such an instance.
Fix this by always decoding the second status into the second
status/callback block which wasn't being used if the dirs were the same.
The afs_update_dentry_version() calls that update the directory data
version numbers on the dentries can then unconditionally use the second
status record as this will always reflect the state of the destination dir
(the two records will be identical if the destination dir is the same as
the source dir)
Fixes: 260a980317 ("[AFS]: Add "directory write" support.")
Fixes: 30062bd13e ("afs: Implement YFS support in the fs client")
Signed-off-by: David Howells <dhowells@redhat.com>
If we're decoding an AFSFetchStatus record and we see that the version is 1
and the abort code is set and we're expecting inline errors, then we store
the abort code and ignore the remaining status record (which is correct),
but we don't set the flag to say we got a valid abort code.
This can affect operation of YFS.RemoveFile2 when removing a file and the
operation of {,Y}FS.InlineBulkStatus when prospectively constructing or
updating of a set of inodes during a lookup.
Fix this to indicate the reception of a valid abort code.
Fixes: a38a75581e ("afs: Fix unlink to handle YFS.RemoveFile2 better")
Signed-off-by: David Howells <dhowells@redhat.com>
If we receive a status record that has VNOVNODE set in the abort field,
xdr_decode_AFSFetchStatus() and xdr_decode_YFSFetchStatus() don't advance
the XDR pointer, thereby corrupting anything subsequent decodes from the
same block of data.
This has the potential to affect AFS.InlineBulkStatus and
YFS.InlineBulkStatus operation, but probably doesn't since the status
records are extracted as individual blocks of data and the buffer pointer
is reset between blocks.
It does affect YFS.RemoveFile2 operation, corrupting the volsync record -
though that is not currently used.
Other operations abort the entire operation rather than returning an error
inline, in which case there is no decoding to be done.
Fix this by unconditionally advancing the xdr pointer.
Fixes: 684b0f68cf ("afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility")
Signed-off-by: David Howells <dhowells@redhat.com>
This sorts the actual field names too, potentially causing even more
chaos and confusion at merge time if you have edited the MAINTAINERS
file. But the end result is a more consistent layout, and hopefully
it's a one-time pain minimized by doing this just before the -rc1
release.
This was entirely scripted:
./scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS --order
Requested-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
They are all supposed to be sorted, but people who add new entries don't
always know the alphabet. Plus sometimes the entry names get edited,
and people don't then re-order the entry.
Let's see how painful this will be for merging purposes (the MAINTAINERS
file is often edited in various different trees), but Joe claims there's
relatively few patches in -next that touch this, and doing it just
before -rc1 is likely the best time. Fingers crossed.
This was scripted with
/scripts/parse-maintainers.pl --input=MAINTAINERS --output=MAINTAINERS
but then I also ended up manually upper-casing a few entry names that
stood out when looking at the end result.
Requested-by: Joe Perches <joe@perches.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
detection feature.
It addressed the case where a KVM guest triggers a split lock #AC and KVM
reinjects it into the guest which is not prepared to handle it.
Adds proper sanity checks which prevent the unconditional injection into
the guest and handles the #AC on the host side in the same way as user
space detections are handled. Depending on the detection mode it either
warns and disables detection for the task or kills the task if the mode is
set to fatal.
-----BEGIN PGP SIGNATURE-----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=8FbL
-----END PGP SIGNATURE-----
Merge tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of three patches to fix the fallout of the newly added split
lock detection feature.
It addressed the case where a KVM guest triggers a split lock #AC and
KVM reinjects it into the guest which is not prepared to handle it.
Add proper sanity checks which prevent the unconditional injection
into the guest and handles the #AC on the host side in the same way as
user space detections are handled. Depending on the detection mode it
either warns and disables detection for the task or kills the task if
the mode is set to fatal"
* tag 'x86-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
KVM: VMX: Extend VMXs #AC interceptor to handle split lock #AC in guest
KVM: x86: Emulate split-lock access as a write in emulator
x86/split_lock: Provide handle_guest_split_lock()
- Fix the time_for_children symlink in /proc/$PID/ so it properly reflects
that it part of the 'time' namespace
- Add the missing userns limit for the allowed number of time namespaces,
which was half defined but the actual array member was not added. This
went unnoticed as the array has an exessive empty member at the end but
introduced a user visible regression as the output was corrupted.
- Prevent further silent ucount corruption by adding a BUILD_BUG_ON() to
catch half updated data.
-----BEGIN PGP SIGNATURE-----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=wOiC
-----END PGP SIGNATURE-----
Merge tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull time(keeping) updates from Thomas Gleixner:
- Fix the time_for_children symlink in /proc/$PID/ so it properly
reflects that it part of the 'time' namespace
- Add the missing userns limit for the allowed number of time
namespaces, which was half defined but the actual array member was
not added. This went unnoticed as the array has an exessive empty
member at the end but introduced a user visible regression as the
output was corrupted.
- Prevent further silent ucount corruption by adding a BUILD_BUG_ON()
to catch half updated data.
* tag 'timers-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
ucount: Make sure ucounts in /proc/sys/user don't regress again
time/namespace: Add max_time_namespaces ucount
time/namespace: Fix time_for_children symlink
- Deduplicate the average computations in the scheduler core and the fair
class code.
- Fix a raise between runtime distribution and assignement which can cause
exceeding the quota by up to 70%.
- Prevent negative results in the imbalanace calculation
- Remove a stale warning in the workqueue code which can be triggered
since the call site was moved out of preempt disabled code. It's a false
positive.
- Deduplicate the print macros for procfs
- Add the ucmap values to the SCHED_DEBUG procfs output for completness
-----BEGIN PGP SIGNATURE-----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=BVqY
-----END PGP SIGNATURE-----
Merge tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes/updates from Thomas Gleixner:
- Deduplicate the average computations in the scheduler core and the
fair class code.
- Fix a raise between runtime distribution and assignement which can
cause exceeding the quota by up to 70%.
- Prevent negative results in the imbalanace calculation
- Remove a stale warning in the workqueue code which can be triggered
since the call site was moved out of preempt disabled code. It's a
false positive.
- Deduplicate the print macros for procfs
- Add the ucmap values to the SCHED_DEBUG procfs output for completness
* tag 'sched-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/debug: Add task uclamp values to SCHED_DEBUG procfs
sched/debug: Factor out printing formats into common macros
sched/debug: Remove redundant macro define
sched/core: Remove unused rq::last_load_update_tick
workqueue: Remove the warning in wq_worker_sleeping()
sched/fair: Fix negative imbalance in imbalance calculation
sched/fair: Fix race between runtime distribution and assignment
sched/fair: Align rq->avg_idle and rq->avg_scan_cost
- Fix the perf event cgroup tracking which tries to track the cgroup even
for disabled events.
- Add Ice Lake server support for uncore events
- Disable pagefaults when retrieving the physical address in the sampling
code.
-----BEGIN PGP SIGNATURE-----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=5kqD
-----END PGP SIGNATURE-----
Merge tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"Three fixes/updates for perf:
- Fix the perf event cgroup tracking which tries to track the cgroup
even for disabled events.
- Add Ice Lake server support for uncore events
- Disable pagefaults when retrieving the physical address in the
sampling code"
* tag 'perf-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Disable page faults when getting phys address
perf/x86/intel/uncore: Add Ice Lake server uncore support
perf/cgroup: Correct indirection in perf_less_group_idx()
perf/core: Fix event cgroup tracking
- Plug a task struct reference leak in the percpu rswem implementation.
- Document the refcount interaction with PID_MAX_LIMIT
- Improve the 'invalid wait context' data dump in lockdep so it contains
all information which is required to decode the problem
-----BEGIN PGP SIGNATURE-----
iQJHBAABCgAxFiEEQp8+kY+LLUocC4bMphj1TA10mKEFAl6TEJoTHHRnbHhAbGlu
dXRyb25peC5kZQAKCRCmGPVMDXSYoeY6D/42AKqIvpAPiPA+Aod9o8o7qDCoPJQN
kwCx939+Mwrwm8YS3WJGJvR/jgoGeq33gerY93D0+jkMyhmvYeWbUIEdCenyy0+C
tkA7pN1j61D7jMqmL8PgrObhQMM8tTdNNsiNxg5qZA8wI2oFBMbAStx5mCficCyJ
8t3hh/2aRVlNN1MBjo25+jEWEXUIchAzmxnmR+5t/pRYWythOhLuWW05D8b1JoN3
9zdHj9ZScONlrK+VmpXZl41SokT385arMXcmUuS+zPx6zl4P6yTgeHMLsm4Kt3+j
1q0hm4fUEEW2IrF1Uc9pxtJh/39UVwvX8Wfj/wJLm3b1akmO+3tQ2cpiee4NHk2H
WogvBNGG4QeGMrRkg0seiqUE6SOaNPXdGRszPc6EkzwpOywDjHVYV5qbII1VOpbK
z/TJrtv8g8ejgAvyG0dEtEDydm2SqPAIAZFXj9JQ0I/gUZKTW5rvGQWdMXW6HPif
wdJJ6xb4DC3f5DrBrXgpkMSdwfea2boIoLDMf9tCcdlRs6vmvY3iRLHy2xBLcRFt
9yVDUxO40eJUxztbFKuZsQvgJyBxZubyK+Yo9CCvWQ95GfIr2JurIJEcD2fxVyRU
57/Avt3zt7iViZ9LHJnL4JnWRxftWOdWusF2dsufmnuveCVhtA5B5bl7nGntpIT2
mfJEDrJ7zzhgyA==
=Agrh
-----END PGP SIGNATURE-----
Merge tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"Three small fixes/updates for the locking core code:
- Plug a task struct reference leak in the percpu rswem
implementation.
- Document the refcount interaction with PID_MAX_LIMIT
- Improve the 'invalid wait context' data dump in lockdep so it
contains all information which is required to decode the problem"
* tag 'locking-urgent-2020-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/lockdep: Improve 'invalid wait context' splat
locking/refcount: Document interaction with PID_MAX_LIMIT
locking/percpu-rwsem: Fix a task_struct refcount
-----BEGIN PGP SIGNATURE-----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=tstz
-----END PGP SIGNATURE-----
Merge tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Ten cifs/smb fixes:
- five RDMA (smbdirect) related fixes
- add experimental support for swap over SMB3 mounts
- also a fix which improves performance of signed connections"
* tag '5.7-rc-smb3-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6:
smb3: enable swap on SMB3 mounts
smb3: change noisy error message to FYI
smb3: smbdirect support can be configured by default
cifs: smbd: Do not schedule work to send immediate packet on every receive
cifs: smbd: Properly process errors on ib_post_send
cifs: Allocate crypto structures on the fly for calculating signatures of incoming packets
cifs: smbd: Update receive credits before sending and deal with credits roll back on failure before sending
cifs: smbd: Check send queue size before posting a send
cifs: smbd: Merge code to track pending packets
cifs: ignore cached share root handle closing errors
- fix an integer truncation in dma_direct_get_required_mask
(Kishon Vijay Abraham)
- fix the display of dma mapping types (Grygorii Strashko)
-----BEGIN PGP SIGNATURE-----
iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAl6Rfy8LHGhjaEBsc3Qu
ZGUACgkQD55TZVIEUYPT3w/+MKNVGmyi6nSsruskr1CkLCah5GkHrDA4v+vwwkFZ
zIeB7df/EOijzfYHlhEkiQWBcPvl9wmVBhFsuaY9XMQ/fJv06CpR5J2xtb+uZN9L
HmfwCJPZwrHDqsonIiOtIWjyIOARLGC0CfBP+DCPJ/GDG9wys7eyfESh85PQEDvO
QA4sPjJHuKeTTH2Q6QLM/aiqgr80Q4xrQLCVcgDAqAvqnCYi/E4HXty4pLNGpvJu
5O2xzmbQT2l3gRXjxt5Ct4pol+nFmiWJ0sBDNVNUqge7vebBiu3e0VjEaeXUPAMq
hQSrof2x+EwHITV10L82/poIKNQVVXW3aYgItMNXfOSBNqaNx4wVLRsrcMZWeMeJ
0OHmCy6Sac2dK4QtY/NtZFLL1zW4ajsj8X975RjqBMcL6QAdCMxNSWGEY/j/fMQy
FV1spy8FBfvXH+0O2POkYNBx/eICnMbGQ2ed5NZ8ONAl8wFLPM+2qIwmgb51a3TG
8jR613Zqyw0aMnky0MUwvj5TlwwUyyXbGKpizl0vkFw7/NYXroNMaYWJSHF/ddFp
vUChNqYhgCFY8FOhanFadyPxqU1InEoOkUS8/ij7NAR6cCrxsLuAohMYSNQJes3R
IvmU36FtjO53rBdHaN4Eizk4EHVaZDxoll05UPU/B5IvzXqR6zy0PphoOxfzvmmq
Qfk=
=Af93
-----END PGP SIGNATURE-----
Merge tag 'dma-mapping-5.7-1' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig:
- fix an integer truncation in dma_direct_get_required_mask
(Kishon Vijay Abraham)
- fix the display of dma mapping types (Grygorii Strashko)
* tag 'dma-mapping-5.7-1' of git://git.infradead.org/users/hch/dma-mapping:
dma-debug: fix displaying of dma allocation type
dma-direct: fix data truncation in dma_direct_get_required_mask()
- raise minimum supported binutils version to 2.23
- remove old CONFIG_AS_* macros that we know binutils >= 2.23 supports
- move remaining CONFIG_AS_* tests to Kconfig from Makefile
- enable -Wtautological-compare warnings to catch more issues
- do not support GCC plugins for GCC <= 4.7
- fix various breakages of 'make xconfig'
- include the linker version used for linking the kernel into
LINUX_COMPILER, which is used for the banner, and also exposed to
/proc/version
- link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y,
which allows us to remove the lib-ksyms.o workaround, and to
solve the last known issue of the LLVM linker
- add dummy tools in scripts/dummy-tools/ to enable all compiler
tests in Kconfig, which will be useful for distro maintainers
- support the single switch, LLVM=1 to use Clang and all LLVM utilities
instead of GCC and Binutils.
- support LLVM_IAS=1 to enable the integrated assembler, which is still
experimental
-----BEGIN PGP SIGNATURE-----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=jpyF
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull more Kbuild updates from Masahiro Yamada:
- raise minimum supported binutils version to 2.23
- remove old CONFIG_AS_* macros that we know binutils >= 2.23 supports
- move remaining CONFIG_AS_* tests to Kconfig from Makefile
- enable -Wtautological-compare warnings to catch more issues
- do not support GCC plugins for GCC <= 4.7
- fix various breakages of 'make xconfig'
- include the linker version used for linking the kernel into
LINUX_COMPILER, which is used for the banner, and also exposed to
/proc/version
- link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y, which
allows us to remove the lib-ksyms.o workaround, and to solve the last
known issue of the LLVM linker
- add dummy tools in scripts/dummy-tools/ to enable all compiler tests
in Kconfig, which will be useful for distro maintainers
- support the single switch, LLVM=1 to use Clang and all LLVM utilities
instead of GCC and Binutils.
- support LLVM_IAS=1 to enable the integrated assembler, which is still
experimental
* tag 'kbuild-v5.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (36 commits)
kbuild: fix comment about missing include guard detection
kbuild: support LLVM=1 to switch the default tools to Clang/LLVM
kbuild: replace AS=clang with LLVM_IAS=1
kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig
kbuild: link lib-y objects to vmlinux forcibly when CONFIG_MODULES=y
MIPS: fw: arc: add __weak to prom_meminit and prom_free_prom_memory
kbuild: remove -I$(srctree)/tools/include from scripts/Makefile
kbuild: do not pass $(KBUILD_CFLAGS) to scripts/mkcompile_h
Documentation/llvm: fix the name of llvm-size
kbuild: mkcompile_h: Include $LD version in /proc/version
kconfig: qconf: Fix a few alignment issues
kconfig: qconf: remove some old bogus TODOs
kconfig: qconf: fix support for the split view mode
kconfig: qconf: fix the content of the main widget
kconfig: qconf: Change title for the item window
kconfig: qconf: clean deprecated warnings
gcc-plugins: drop support for GCC <= 4.7
kbuild: Enable -Wtautological-compare
x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2
crypto: x86 - clean up poly1305-x86_64-cryptogams.S by 'make clean'
...
I do not longer work for credativ Germany.
Please, use my private email address instead.
This is for the case when people want to CC me on
patches sent from my old business email address.
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When oops happens with panic_on_oops unset, the oops
thread is killed by die() and system continues to run.
In such case, guest should not report crash register
data to host since system still runs. Check panic_on_oops
and return directly in hyperv_report_panic() when the function
is called in the die() and panic_on_oops is unset. Fix it.
Fixes: 7ed4325a44 ("Drivers: hv: vmbus: Make panic reporting to be more useful")
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-7-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
When sysctl_record_panic_msg is not set, the panic will
not be reported to Hyper-V via hyperv_report_panic_msg().
So the crash should be reported via hyperv_report_panic().
Fixes: 81b18bce48 ("Drivers: HV: Send one page worth of kmsg dump over Hyper-V during panic")
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-6-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
We want to notify Hyper-V when a Linux guest VM crash occurs, so
there is a record of the crash even when kdump is enabled. But
crash_kexec_post_notifiers defaults to "false", so the kdump kernel
runs before the notifiers and Hyper-V never gets notified. Fix this by
always setting crash_kexec_post_notifiers to be true for Hyper-V VMs.
Fixes: 81b18bce48 ("Drivers: HV: Send one page worth of kmsg dump over Hyper-V during panic")
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-5-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
When a guest VM panics, Hyper-V should be notified only once via the
crash synthetic MSRs. Current Linux code might write these crash MSRs
twice during a system panic:
1) hyperv_panic/die_event() calling hyperv_report_panic()
2) hv_kmsg_dump() calling hyperv_report_panic_msg()
Fix this by not calling hyperv_report_panic() if a kmsg dump has been
successfully registered. The notification will happen later via
hyperv_report_panic_msg().
Fixes: 7ed4325a44 ("Drivers: hv: vmbus: Make panic reporting to be more useful")
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-4-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Another brown paper bag moment. pnfs_alloc_ds_commits_list() is leaking
the RCU lock.
Fixes: a9901899b6 ("pNFS: Add infrastructure for cleaning up per-layout commit structures")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Two types of #AC can be generated in Intel CPUs:
1. legacy alignment check #AC
2. split lock #AC
Reflect #AC back into the guest if the guest has legacy alignment checks
enabled or if split lock detection is disabled.
If the #AC is not a legacy one and split lock detection is enabled, then
invoke handle_guest_split_lock() which will either warn and disable split
lock detection for this task or force SIGBUS on it.
[ tglx: Switch it to handle_guest_split_lock() and rename the misnamed
helper function. ]
Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lkml.kernel.org/r/20200410115517.176308876@linutronix.de
Without at least minimal handling for split lock detection induced #AC,
VMX will just run into the same problem as the VMWare hypervisor, which
was reported by Kenneth.
It will inject the #AC blindly into the guest whether the guest is
prepared or not.
Provide a function for guest mode which acts depending on the host
SLD mode. If mode == sld_warn, treat it like user space, i.e. emit a
warning, disable SLD and mark the task accordingly. Otherwise force
SIGBUS.
[ bp: Add a !CPU_SUP_INTEL stub for handle_guest_split_lock(). ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lkml.kernel.org/r/20200410115516.978037132@linutronix.de
Link: https://lkml.kernel.org/r/20200402123258.895628824@linutronix.de
Merge yet more updates from Andrew Morton:
- Almost all of the rest of MM (memcg, slab-generic, slab, pagealloc,
gup, hugetlb, pagemap, memremap)
- Various other things (hfs, ocfs2, kmod, misc, seqfile)
* akpm: (34 commits)
ipc/util.c: sysvipc_find_ipc() should increase position index
kernel/gcov/fs.c: gcov_seq_next() should increase position index
fs/seq_file.c: seq_read(): add info message about buggy .next functions
drivers/dma/tegra20-apb-dma.c: fix platform_get_irq.cocci warnings
change email address for Pali Rohár
selftests: kmod: test disabling module autoloading
selftests: kmod: fix handling test numbers above 9
docs: admin-guide: document the kernel.modprobe sysctl
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
kmod: make request_module() return an error when autoloading is disabled
mm/memremap: set caching mode for PCI P2PDMA memory to WC
mm/memory_hotplug: add pgprot_t to mhp_params
powerpc/mm: thread pgprot_t through create_section_mapping()
x86/mm: introduce __set_memory_prot()
x86/mm: thread pgprot_t through init_memory_mapping()
mm/memory_hotplug: rename mhp_restrictions to mhp_params
mm/memory_hotplug: drop the flags field from struct mhp_restrictions
mm/special: create generic fallbacks for pte_special() and pte_mkspecial()
mm/vma: introduce VM_ACCESS_FLAGS
mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS
...
Fix: Christoph Hellwig noticed that some logic I added to
orangefs_file_read_iter introduced a race condition, so he
sent a reversion patch. I had to modify his patch since
reverting at this point broke Orangefs.
Cleanup 1: Christoph Hellwig noticed that we were doing some unnecessary
work in orangefs_flush, so he sent in a patch that removed
the un-needed code.
Cleanup 2: Al Viro told me he had trouble building Orangefs. Orangefs
should be easy to build, even for Al :-). I looked back
at the test server build notes in orangefs.txt, just in case
that's where the trouble really is, and found a couple of
typos and made a couple of clarifications.
Merge Conflict: Stephen Rothwell reported that my modifications to
orangefs.txt caused a merge conflict with orangefs.rst
in Linux Next. I wasn't sure what to do, so I asked,
and Jonathan Corbet said not to worry about it and
just to report it to Linus.
-----BEGIN PGP SIGNATURE-----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=dNWv
-----END PGP SIGNATURE-----
Merge tag 'for-linus-5.7-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux
Pull orangefs updates from Mike Marshall:
"A fix and two cleanups.
Fix:
- Christoph Hellwig noticed that some logic I added to
orangefs_file_read_iter introduced a race condition, so he sent a
reversion patch. I had to modify his patch since reverting at this
point broke Orangefs.
Cleanups:
- Christoph Hellwig noticed that we were doing some unnecessary work
in orangefs_flush, so he sent in a patch that removed the un-needed
code.
- Al Viro told me he had trouble building Orangefs. Orangefs should
be easy to build, even for Al :-).
I looked back at the test server build notes in orangefs.txt, just
in case that's where the trouble really is, and found a couple of
typos and made a couple of clarifications"
* tag 'for-linus-5.7-ofs1' of git://git.kernel.org/pub/scm/linux/kernel/git/hubcap/linux:
orangefs: clarify build steps for test server in orangefs.txt
orangefs: don't mess with I_DIRTY_TIMES in orangefs_flush
orangefs: get rid of knob code...
- replace setup_irq() by request_irq();
- cosmetic fixes in xtensa Kconfig and boot/Makefile.
-----BEGIN PGP SIGNATURE-----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=y3Fr
-----END PGP SIGNATURE-----
Merge tag 'xtensa-20200410' of git://github.com/jcmvbkbc/linux-xtensa
Pull xtensa updates from Max Filippov:
- replace setup_irq() by request_irq()
- cosmetic fixes in xtensa Kconfig and boot/Makefile
* tag 'xtensa-20200410' of git://github.com/jcmvbkbc/linux-xtensa:
arch/xtensa: fix grammar in Kconfig help text
xtensa: remove meaningless export ccflags-y
xtensa: replace setup_irq() by request_irq()
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCXpAQNgAKCRCAXGG7T9hj
voLNAP9VWlSX7Whn4o9fndit2HyqDpOo7fQKiuU4XtDd++FG6QD/Zcu201B8ZP8M
rkbeFthX+W9PAyZ0itf1vCL4fQoR7gw=
=pRJH
-----END PGP SIGNATURE-----
Merge tag 'for-linus-5.7-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull more xen updates from Juergen Gross:
- two cleanups
- fix a boot regression introduced in this merge window
- fix wrong use of memory allocation flags
* tag 'for-linus-5.7-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
x86/xen: fix booting 32-bit pv guest
x86/xen: make xen_pvmmu_arch_setup() static
xen/blkfront: fix memory allocation flags in blkfront_setup_indirect()
xen: Use evtchn_type_t as a type for event channels
If seq_file .next function does not change position index, read after
some lseek can generate unexpected output.
https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Waiman Long <longman@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: NeilBrown <neilb@suse.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/b7a20945-e315-8bb0-21e6-3875c14a8494@virtuozzo.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If seq_file .next function does not change position index, read after
some lseek can generate unexpected output.
https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: NeilBrown <neilb@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Waiman Long <longman@redhat.com>
Link: http://lkml.kernel.org/r/f65c6ee7-bd00-f910-2f8a-37cc67e4ff88@virtuozzo.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "seq_file .next functions should increase position index".
In Aug 2018 NeilBrown noticed commit 1f4aace60b ("fs/seq_file.c:
simplify seq_file iteration code and interface")
"Some ->next functions do not increment *pos when they return NULL...
Note that such ->next functions are buggy and should be fixed. A simple
demonstration is dd if=/proc/swaps bs=1000 skip=1 Choose any block size
larger than the size of /proc/swaps. This will always show the whole
last line of /proc/swaps"
Described problem is still actual. If you make lseek into middle of
last output line following read will output end of last line and whole
last line once again.
$ dd if=/proc/swaps bs=1 # usual output
Filename Type Size Used Priority
/dev/dm-0 partition 4194812 97536 -2
104+0 records in
104+0 records out
104 bytes copied
$ dd if=/proc/swaps bs=40 skip=1 # last line was generated twice
dd: /proc/swaps: cannot skip to specified offset
v/dm-0 partition 4194812 97536 -2
/dev/dm-0 partition 4194812 97536 -2
3+1 records in
3+1 records out
131 bytes copied
There are lot of other affected files, I've found 30+ including
/proc/net/ip_tables_matches and /proc/sysvipc/*
I've sent patches into maillists of affected subsystems already, this
patch-set fixes the problem in files related to pstore, tracing, gcov,
sysvipc and other subsystems processed via linux-kernel@ mailing list
directly
https://bugzilla.kernel.org/show_bug.cgi?id=206283
This patch (of 4):
Add debug code to seq_read() to detect missed or out-of-tree incorrect
.next seq_file functions.
[akpm@linux-foundation.org: s/pr_info/pr_info_ratelimited/, per Qian Cai]
https://bugzilla.kernel.org/show_bug.cgi?id=206283
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: NeilBrown <neilb@suse.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Cc: Waiman Long <longman@redhat.com>
Link: http://lkml.kernel.org/r/244674e5-760c-86bd-d08a-047042881748@virtuozzo.com
Link: http://lkml.kernel.org/r/7c24087c-e280-e580-5b0c-0cdaeb14cd18@virtuozzo.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
For security reasons I stopped using gmail account and kernel address is
now up-to-date alias to my personal address.
People periodically send me emails to address which they found in source
code of drivers, so this change reflects state where people can contact
me.
[ Added .mailmap entry as per Joe Perches - Linus ]
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Joe Perches <joe@perches.com>
Link: http://lkml.kernel.org/r/20200307104237.8199-1-pali@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Test that request_module() fails with -ENOENT when
/proc/sys/kernel/modprobe contains (a) a nonexistent path, and (b) an
empty path.
Case (b) is a regression test for the patch "kmod: make request_module()
return an error when autoloading is disabled".
Tested with 'kmod.sh -t 0010 && kmod.sh -t 0011', and also simply with
'kmod.sh' to run all kmod tests.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: NeilBrown <neilb@suse.com>
Link: http://lkml.kernel.org/r/20200312202552.241885-5-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
get_test_count() and get_test_enabled() were broken for test numbers
above 9 due to awk interpreting a field specification like '$0010' as
octal rather than decimal. Fix it by stripping the leading zeroes.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: NeilBrown <neilb@suse.com>
Link: http://lkml.kernel.org/r/20200318230515.171692-5-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Document the kernel.modprobe sysctl in the same place that all the other
kernel.* sysctls are documented. Make sure to mention how to use this
sysctl to completely disable module autoloading, and how this sysctl
relates to CONFIG_STATIC_USERMODEHELPER.
[ebiggers@google.com: v5]
Link: http://lkml.kernel.org/r/20200318230515.171692-4-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: NeilBrown <neilb@suse.com>
Link: http://lkml.kernel.org/r/20200312202552.241885-4-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
After request_module(), nothing is stopping the module from being
unloaded until someone takes a reference to it via try_get_module().
The WARN_ONCE() in get_fs_type() is thus user-reachable, via userspace
running 'rmmod' concurrently.
Since WARN_ONCE() is for kernel bugs only, not for user-reachable
situations, downgrade this warning to pr_warn_once().
Keep it printed once only, since the intent of this warning is to detect
a bug in modprobe at boot time. Printing the warning more than once
wouldn't really provide any useful extra information.
Fixes: 41124db869 ("fs: warn in case userspace lied about modprobe return")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jessica Yu <jeyu@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Jessica Yu <jeyu@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: NeilBrown <neilb@suse.com>
Cc: <stable@vger.kernel.org> [4.13+]
Link: http://lkml.kernel.org/r/20200312202552.241885-3-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "module autoloading fixes and cleanups", v5.
This series fixes a bug where request_module() was reporting success to
kernel code when module autoloading had been completely disabled via
'echo > /proc/sys/kernel/modprobe'.
It also addresses the issues raised on the original thread
(https://lkml.kernel.org/lkml/20200310223731.126894-1-ebiggers@kernel.org/T/#u)
bydocumenting the modprobe sysctl, adding a self-test for the empty path
case, and downgrading a user-reachable WARN_ONCE().
This patch (of 4):
It's long been possible to disable kernel module autoloading completely
(while still allowing manual module insertion) by setting
/proc/sys/kernel/modprobe to the empty string.
This can be preferable to setting it to a nonexistent file since it
avoids the overhead of an attempted execve(), avoids potential
deadlocks, and avoids the call to security_kernel_module_request() and
thus on SELinux-based systems eliminates the need to write SELinux rules
to dontaudit module_request.
However, when module autoloading is disabled in this way,
request_module() returns 0. This is broken because callers expect 0 to
mean that the module was successfully loaded.
Apparently this was never noticed because this method of disabling
module autoloading isn't used much, and also most callers don't use the
return value of request_module() since it's always necessary to check
whether the module registered its functionality or not anyway.
But improperly returning 0 can indeed confuse a few callers, for example
get_fs_type() in fs/filesystems.c where it causes a WARNING to be hit:
if (!fs && (request_module("fs-%.*s", len, name) == 0)) {
fs = __get_fs_type(name, len);
WARN_ONCE(!fs, "request_module fs-%.*s succeeded, but still no fs?\n", len, name);
}
This is easily reproduced with:
echo > /proc/sys/kernel/modprobe
mount -t NONEXISTENT none /
It causes:
request_module fs-NONEXISTENT succeeded, but still no fs?
WARNING: CPU: 1 PID: 1106 at fs/filesystems.c:275 get_fs_type+0xd6/0xf0
[...]
This should actually use pr_warn_once() rather than WARN_ONCE(), since
it's also user-reachable if userspace immediately unloads the module.
Regardless, request_module() should correctly return an error when it
fails. So let's make it return -ENOENT, which matches the error when
the modprobe binary doesn't exist.
I've also sent patches to document and test this case.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Jessica Yu <jeyu@kernel.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jeff Vander Stoep <jeffv@google.com>
Cc: Ben Hutchings <benh@debian.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200310223731.126894-1-ebiggers@kernel.org
Link: http://lkml.kernel.org/r/20200312202552.241885-1-ebiggers@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
