Convert shell tests to also run using test case style.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-19-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Replaced by null terminated test case array.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-16-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Use null terminated array of test cases rather than the previous sub
test functions.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-15-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Use null terminated array of test cases rather than the previous sub
test functions.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-14-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Use null terminated array of test cases rather than the previous sub
test functions.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-13-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Use null terminated array of test cases rather than the previous sub
test functions.
Committer notes:
On s/390x we don't use __event(), so wrap it with __s390x__
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-12-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
commit 8779e05ba8 ("parisc: Fix ptrace check on syscall return")
fixed testing of TI_FLAGS. This uncovered a bug in the test mask.
syscall_restore_rfi is only used when the kernel needs to exit to
usespace with single or block stepping and the recovery counter
enabled. The test however used _TIF_SYSCALL_TRACE_MASK, which
includes a lot of bits that shouldn't be tested here.
Fix this by using TIF_SINGLESTEP and TIF_BLOCKSTEP directly.
I encountered this bug by enabling syscall tracepoints. Both in qemu and
on real hardware. As soon as i enabled the tracepoint (sys_exit_read,
but i guess it doesn't really matter which one), i got random page
faults in userspace almost immediately.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
For years, there have been random segmentation faults in userspace on
SMP PA-RISC machines. It occurred to me that this might be a problem in
set_pte_at(). MIPS and some other architectures do cache flushes when
installing PTEs with the present bit set.
Here I have adapted the code in update_mmu_cache() to flush the kernel
mapping when the kernel flush is deferred, or when the kernel mapping
may alias with the user mapping. This simplifies calls to
update_mmu_cache().
I also changed the barrier in set_pte() from a compiler barrier to a
full memory barrier. I know this change is not sufficient to fix the
problem. It might not be needed.
I have had a few days of operation with 5.14.16 to 5.15.1 and haven't
seen any random segmentation faults on rp3440 or c8000 so far.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@kernel.org # 5.12+
I noticed that sometimes at kernel startup the backtraces did not
included the function names of init functions. Their address were not
resolved to function names and instead only the address was printed.
Debugging shows that the culprit is is_ksym_addr() which is called
by the backtrace functions to check if an address belongs to a function in
the kernel. The problem occurs only for CONFIG_KALLSYMS_ALL=y.
When looking at is_ksym_addr() one can see that for CONFIG_KALLSYMS_ALL=y
the function only tries to resolve the address via is_kernel() function,
which checks like this:
if (addr >= _stext && addr <= _end)
return 1;
On parisc the init functions are located before _stext, so this check fails.
Other platforms seem to have all functions (including init functions)
behind _stext.
The following patch moves the _stext symbol at the beginning of the
kernel and thus includes the init section. This fixes the check and does
not seem to have any negative side effects on where the kernel mapping
happens in the map_pages() function in arch/parisc/mm/init.c.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@kernel.org # 5.4+
a little more time to soak in linux-next.
- Use modern i2c probe in vc5
- Cleanup some includes
- Update links to datasheets
- Add UniPhier NX1 SoC clk support
- Fix DT bindings for SiFive FU740
- Revert the module platform driver support for Rockchip out
because it wasn't actually tested
- Fix the composite clk code again as the previous fix had a
one line bug that broke rate changes for clks that want to use
the same parent still
- Use the right table for a divider in ast2600 driver
- Get rid of gcc_aggre1_pnoc_ahb_clk in qcom clk driver again because
its critical but unused
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Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull more clk updates from Stephen Boyd:
"This is the second batch of clk driver updates that needed a little
more time to soak in linux-next.
- Use modern i2c probe in vc5
- Cleanup some includes
- Update links to datasheets
- Add UniPhier NX1 SoC clk support
- Fix DT bindings for SiFive FU740
- Revert the module platform driver support for Rockchip because it
wasn't actually tested
- Fix the composite clk code again as the previous fix had a one line
bug that broke rate changes for clks that want to use the same
parent still
- Use the right table for a divider in ast2600 driver
- Get rid of gcc_aggre1_pnoc_ahb_clk in qcom clk driver again because
its critical but unused"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: qcom: gcc-msm8996: Drop (again) gcc_aggre1_pnoc_ahb_clk
clk: imx8m: Do not set IMX_COMPOSITE_CORE for non-regular composites
clk/ast2600: Fix soc revision for AHB
clk: composite: Fix 'switching' to same clock
clk: rockchip: drop module parts from rk3399 and rk3568 drivers
Revert "clk: rockchip: use module_platform_driver_probe"
clk:mediatek: remove duplicate include in clk-mt8195-imp_iic_wrap.c
dt-bindings: clock: fu740-prci: add reset-cells
clk: uniphier: Add SoC-glue clock source selector support for Pro4
dt-bindings: clock: uniphier: Add clock binding for SoC-glue
clk: uniphier: Add NX1 clock support
dt-bindings: clock: uniphier: Add NX1 clock binding
clk: uniphier: Add audio system and video input clock control for PXs3
clk: si5351: Update datasheet references
clk: vc5: Use i2c .probe_new
clk/actions/owl-factor.c: remove superfluous headers
clk: ingenic: Fix bugs with divided dividers
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Merge tag 'block-5.16-2021-11-13' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"Set of fixes that should go into this merge window:
- ioctl vs read data race fixes (Shin'ichiro)
- blkcg use-after-free fix (Laibin)
- Last piece of the puzzle for add_disk() error handling, enable
__must_check for (Luis)
- Request allocation fixes (Ming)
- Misc fixes (me)"
* tag 'block-5.16-2021-11-13' of git://git.kernel.dk/linux-block:
blk-mq: fix filesystem I/O request allocation
blkcg: Remove extra blkcg_bio_issue_init
block: Hold invalidate_lock in BLKRESETZONE ioctl
blk-mq: rename blk_attempt_bio_merge
blk-mq: don't grab ->q_usage_counter in blk_mq_sched_bio_merge
block: fix kerneldoc for disk_register_independent_access__ranges()
block: add __must_check for *add_disk*() callers
block: use enum type for blk_mq_alloc_data->rq_flags
block: Hold invalidate_lock in BLKZEROOUT ioctl
block: Hold invalidate_lock in BLKDISCARD ioctl
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Merge tag 'io_uring-5.16-2021-11-13' of git://git.kernel.dk/linux-block
Pull io_uring fix from Jens Axboe:
"Just a single fix here for a buffered write hash stall, which is also
affecting stable"
* tag 'io_uring-5.16-2021-11-13' of git://git.kernel.dk/linux-block:
io-wq: serialize hash clear with wakeup
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Merge tag '5.16-rc-part2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull more cifs updates from Steve French:
- improvements to reconnect and multichannel
- a performance improvement (additional use of SMB3 compounding)
- DFS code cleanup and improvements
- various trivial Coverity fixes
- two fscache fixes
- an fsync fix
* tag '5.16-rc-part2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: (23 commits)
cifs: do not duplicate fscache cookie for secondary channels
cifs: connect individual channel servers to primary channel server
cifs: protect session channel fields with chan_lock
cifs: do not negotiate session if session already exists
smb3: do not setup the fscache_super_cookie until fsinfo initialized
cifs: fix potential use-after-free bugs
cifs: fix memory leak of smb3_fs_context_dup::server_hostname
smb3: add additional null check in SMB311_posix_mkdir
cifs: release lock earlier in dequeue_mid error case
smb3: add additional null check in SMB2_tcon
smb3: add additional null check in SMB2_open
smb3: add additional null check in SMB2_ioctl
smb3: remove trivial dfs compile warning
cifs: support nested dfs links over reconnect
smb3: do not error on fsync when readonly
cifs: for compound requests, use open handle if possible
cifs: set a minimum of 120s for next dns resolution
cifs: split out dfs code from cifs_reconnect()
cifs: convert list_for_each to entry variant
cifs: introduce new helper for cifs_reconnect()
...
This reverts commit b9d02f1bdd.
The error handling of that patch was fundamentally broken, and it needs
to be entirely re-done.
For example, in shmem_write_begin() it would call shmem_getpage(), then
ignore the error return from that, and look at the page pointer contents
instead.
And in shmem_read_mapping_page_gfp(), the patch tested PageHWPoison() on
a page pointer that two lines earlier had potentially been set as an
error pointer.
These issues could be individually fixed, but when it has this many
issues, I'm just reverting it instead of waiting for fixes.
Link: https://lore.kernel.org/linux-mm/20211111084617.6746-1-ajaygargnsit@gmail.com/
Reported-by: Ajay Garg <ajaygargnsit@gmail.com>
Reported-by: Jens Axboe <axboe@kernel.dk>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Merge tag '5.16-rc-ksmbd-fixes' of git://git.samba.org/ksmbd
Pull ksmbd updates from Steve French:
"Several smb server fixes; three for stable:
- important fix for negotiation info validation
- fix alignment check in packet validation
- cleanup of dead code (like MD4)
- refactoring some protocol headers to use common code in smbfs_common"
* tag '5.16-rc-ksmbd-fixes' of git://git.samba.org/ksmbd:
ksmbd: Use the SMB3_Create definitions from the shared
ksmbd: Move more definitions into the shared area
ksmbd: use the common definitions for NEGOTIATE_PROTOCOL
ksmbd: switch to use shared definitions where available
ksmbd: change LeaseKey data type to u8 array
ksmbd: remove smb2_buf_length in smb2_transform_hdr
ksmbd: remove smb2_buf_length in smb2_hdr
ksmbd: remove md4 leftovers
ksmbd: set unique value to volume serial field in FS_VOLUME_INFORMATION
ksmbd: don't need 8byte alignment for request length in ksmbd_check_message
ksmbd: Fix buffer length check in fsctl_validate_negotiate_info()
ksmbd: Remove redundant 'flush_workqueue()' calls
ksmdb: use cmd helper variable in smb2_get_ksmbd_tcon()
ksmbd: use ksmbd_req_buf_next() in ksmbd_smb2_check_message()
ksmbd: use ksmbd_req_buf_next() in ksmbd_verify_smb_message()
in 5.7 are now enabled by default. This should greatly speed up things
like rm, tar and rsync. To opt out, wsync mount option can be used.
Other than that we have a pile of bug fixes all across the filesystem
from Jeff, Xiubo and Kotresh and a metrics infrastructure rework from
Luis.
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Merge tag 'ceph-for-5.16-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"One notable change here is that async creates and unlinks introduced
in 5.7 are now enabled by default. This should greatly speed up things
like rm, tar and rsync. To opt out, wsync mount option can be used.
Other than that we have a pile of bug fixes all across the filesystem
from Jeff, Xiubo and Kotresh and a metrics infrastructure rework from
Luis"
* tag 'ceph-for-5.16-rc1' of git://github.com/ceph/ceph-client:
ceph: add a new metric to keep track of remote object copies
libceph, ceph: move ceph_osdc_copy_from() into cephfs code
ceph: clean-up metrics data structures to reduce code duplication
ceph: split 'metric' debugfs file into several files
ceph: return the real size read when it hits EOF
ceph: properly handle statfs on multifs setups
ceph: shut down mount on bad mdsmap or fsmap decode
ceph: fix mdsmap decode when there are MDS's beyond max_mds
ceph: ignore the truncate when size won't change with Fx caps issued
ceph: don't rely on error_string to validate blocklisted session.
ceph: just use ci->i_version for fscache aux info
ceph: shut down access to inode when async create fails
ceph: refactor remove_session_caps_cb
ceph: fix auth cap handling logic in remove_session_caps_cb
ceph: drop private list from remove_session_caps_cb
ceph: don't use -ESTALE as special return code in try_get_cap_refs
ceph: print inode numbers instead of pointer values
ceph: enable async dirops by default
libceph: drop ->monmap and err initialization
ceph: convert to noop_direct_IO
- fix unsafe pagevec reuse which could cause unexpected behaviors;
- get rid of the unused DELAYEDALLOC strategy.
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Merge tag 'erofs-for-5.16-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull erofs fixes from Gao Xiang:
- fix unsafe pagevec reuse which could cause unexpected behaviors
- get rid of the unused DELAYEDALLOC strategy that has been replaced by
TRYALLOC
* tag 'erofs-for-5.16-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
erofs: remove useless cache strategy of DELAYEDALLOC
erofs: fix unsafe pagevec reuse of hooked pclusters
In this cycle, we've applied relatively small number of patches which fix subtle
corner cases mainly, while introducing a new mount option to be able to fragment
the disk intentionally for performance tests.
Enhancement:
- add a mount option to fragmente on-disk layout to understand the performance
- support direct IO for multi-partitions
- add a fault injection of dquot_initialize
Bug fix:
- address some lockdep complaints
- fix a deadlock issue with quota
- fix a memory tuning condition
- fix compression condition to improve the ratio
- fix disabling compression on the non-empty compressed file
- invalidate cached pages before IPU/DIO writes
And, we've added some minor clean-ups as usual.
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Merge tag 'f2fs-for-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs updates from Jaegeuk Kim:
"In this cycle, we've applied relatively small number of patches which
fix subtle corner cases mainly, while introducing a new mount option
to be able to fragment the disk intentionally for performance tests.
Enhancements:
- add a mount option to fragmente on-disk layout to understand the
performance
- support direct IO for multi-partitions
- add a fault injection of dquot_initialize
Bug fixes:
- address some lockdep complaints
- fix a deadlock issue with quota
- fix a memory tuning condition
- fix compression condition to improve the ratio
- fix disabling compression on the non-empty compressed file
- invalidate cached pages before IPU/DIO writes
And, we've added some minor clean-ups as usual"
* tag 'f2fs-for-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
f2fs: fix UAF in f2fs_available_free_memory
f2fs: invalidate META_MAPPING before IPU/DIO write
f2fs: support fault injection for dquot_initialize()
f2fs: fix incorrect return value in f2fs_sanity_check_ckpt()
f2fs: compress: disallow disabling compress on non-empty compressed file
f2fs: compress: fix overwrite may reduce compress ratio unproperly
f2fs: multidevice: support direct IO
f2fs: introduce fragment allocation mode mount option
f2fs: replace snprintf in show functions with sysfs_emit
f2fs: include non-compressed blocks in compr_written_block
f2fs: fix wrong condition to trigger background checkpoint correctly
f2fs: fix to use WHINT_MODE
f2fs: fix up f2fs_lookup tracepoints
f2fs: set SBI_NEED_FSCK flag when inconsistent node block found
f2fs: introduce excess_dirty_threshold()
f2fs: avoid attaching SB_ACTIVE flag during mount
f2fs: quota: fix potential deadlock
f2fs: should use GFP_NOFS for directory inodes
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Merge tag 'netfs-folio-20211111' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull netfs, 9p, afs and ceph (partial) foliation from David Howells:
"This converts netfslib, 9p and afs to use folios. It also partially
converts ceph so that it uses folios on the boundaries with netfslib.
To help with this, a couple of folio helper functions are added in the
first two patches.
These patches don't touch fscache and cachefiles as I intend to remove
all the code that deals with pages directly from there. Only nfs and
cifs are using the old fscache I/O API now. The new API uses iov_iter
instead.
Thanks to Jeff Layton, Dominique Martinet and AuriStor for testing and
retesting the patches"
* tag 'netfs-folio-20211111' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
afs: Use folios in directory handling
netfs, 9p, afs, ceph: Use folios
folio: Add a function to get the host inode for a folio
folio: Add a function to change the private data attached to a folio
Update MAINTAINERS information (mailing list, web page, etc).
Add a semantic patch from Wen Yang to check for do_div calls that may
cause truncation, motivated by
commit b0ab99e773 ("sched: Fix possible divide by zero in avg_atom() calculation")
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
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Merge tag 'coccinelle-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux
Pull coccinelle updates from Julia Lawall:
- Update MAINTAINERS information (mailing list, web page, etc).
- Add a semantic patch from Wen Yang to check for do_div calls that may
cause truncation, motivated by commit b0ab99e773 ("sched: Fix
possible divide by zero in avg_atom() calculation")
* tag 'coccinelle-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux:
coccinelle: update Coccinelle entry
coccinelle: semantic patch to check for inappropriate do_div() calls
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Merge tag 'selinux-pr-20211112' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fixes from Paul Moore:
"Unfortunately I need to request a revert for two LSM/SELinux patches
that came in via the network tree. The two patches in question add a
new SCTP/LSM hook as well as an SELinux implementation of that LSM
hook. The short version of "why?" is in the commit description of the
revert patch, but I'll copy-n-paste the important bits below to save
some time for the curious:
... Unfortunately these two patches were merged without proper
review (the Reviewed-by and Tested-by tags from Richard Haines
were for previous revisions of these patches that were
significantly different) and there are outstanding objections from
the SELinux maintainers regarding these patches.
Work is currently ongoing to correct the problems identified in
the reverted patches, as well as others that have come up during
review, but it is unclear at this point in time when that work
will be ready for inclusion in the mainline kernel. In the
interest of not keeping objectionable code in the kernel for
multiple weeks, and potentially a kernel release, we are reverting
the two problematic patches.
As usual with these things there is plenty of context to go with this
and I'll try to do my best to provide that now. This effort started
with a report of SCTP client side peel-offs not working correctly with
SELinux, Ondrej Mosnacek put forth a patch which he believed properly
addressed the problem but upon review by the netdev folks Xin Long
described some additional issues and submitted an improved patchset
for review. The SELinux folks reviewed Xin Long's initial patchset and
suggested some changes which resulted in a second patchset (v2) from
Xin Long; this is the patchset that is currently in your tree.
Unfortunately this v2 patchset from Xin Long was merged before it had
spent even just 24 hours on the mailing lists during the early days of
the merge window, a time when many of us were busy doing verification
of the newly released v5.15 kernel as well final review and testing of
our v5.16 pull requests. Making matters worse, upon reviewing the v2
patchset there were both changes which were found objectionable by
SELinux standards as well as additional outstanding SCTP/SELinux
interaction problems. At this point we did two things: resumed working
on a better fix for the SCTP/SELinux issue(s) - thank you Ondrej - and
we asked the networking folks to revert the v2 patchset.
The revert request was obviously rejected, but at the time I believed
it was just going to be an issue for linux-next; I wasn't expecting
something this significant that was merged into the networking tree
during the merge window to make it into your tree in the same window,
yet as of last night that is exactly what happened. While we continue
to try and resolve the SCTP/SELinux problem I am asking once again to
revert the v2 patches and not ship the current
security_sctp_assoc_established() hook in a v5.16-rcX kernel. If I was
confident that we could solve these issues in a week, maybe two, I
would refrain from asking for the revert but our current estimate is
for a minimum of two weeks for the next patch revision. With the
likelihood of additional delays due to normal patch review follow-up
and/or holidays it seems to me that the safest course of action is to
revert the patch both to try and keep some objectionable code out of a
release kernel and limit the chances of any new breakages from such a
change. While the SCTP/SELinux code in v5.15 and earlier has problems,
they are known problems, and I'd like to try and avoid creating new
and different problems while we work to fix things properly.
One final thing to mention: Xin Long's v2 patchset consisted of four
patches, yet this revert is for only the last two. We see the first
two patches as good, reasonable, and not likely to cause an issue. In
an attempt to create a cleaner revert patch we suggest leaving the
first two patches in the tree as they are currently"
* tag 'selinux-pr-20211112' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
net,lsm,selinux: revert the security_sctp_assoc_established() hook
- Make local osnoise_instances static
- Copy just actual size of histogram strings
- Properly check missing operands in histogram expressions
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Merge tag 'trace-v5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"Three tracing fixes:
- Make local osnoise_instances static
- Copy just actual size of histogram strings
- Properly check missing operands in histogram expressions"
* tag 'trace-v5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/histogram: Fix check for missing operands in an expression
tracing/histogram: Do not copy the fixed-size char array field over the field size
tracing/osnoise: Make osnoise_instances static
* Guest API and guest kernel support for SEV live migration
* SEV and SEV-ES intra-host migration
Bugfixes and cleanups for x86:
* Fix misuse of gfn-to-pfn cache when recording guest steal time / preempted status
* Fix selftests on APICv machines
* Fix sparse warnings
* Fix detection of KVM features in CPUID
* Cleanups for bogus writes to MSR_KVM_PV_EOI_EN
* Fixes and cleanups for MSR bitmap handling
* Cleanups for INVPCID
* Make x86 KVM_SOFT_MAX_VCPUS consistent with other architectures
Bugfixes for ARM:
* Fix finalization of host stage2 mappings
* Tighten the return value of kvm_vcpu_preferred_target()
* Make sure the extraction of ESR_ELx.EC is limited to architected bits
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more kvm updates from Paolo Bonzini:
"New x86 features:
- Guest API and guest kernel support for SEV live migration
- SEV and SEV-ES intra-host migration
Bugfixes and cleanups for x86:
- Fix misuse of gfn-to-pfn cache when recording guest steal time /
preempted status
- Fix selftests on APICv machines
- Fix sparse warnings
- Fix detection of KVM features in CPUID
- Cleanups for bogus writes to MSR_KVM_PV_EOI_EN
- Fixes and cleanups for MSR bitmap handling
- Cleanups for INVPCID
- Make x86 KVM_SOFT_MAX_VCPUS consistent with other architectures
Bugfixes for ARM:
- Fix finalization of host stage2 mappings
- Tighten the return value of kvm_vcpu_preferred_target()
- Make sure the extraction of ESR_ELx.EC is limited to architected
bits"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (34 commits)
KVM: SEV: unify cgroup cleanup code for svm_vm_migrate_from
KVM: x86: move guest_pv_has out of user_access section
KVM: x86: Drop arbitrary KVM_SOFT_MAX_VCPUS
KVM: Move INVPCID type check from vmx and svm to the common kvm_handle_invpcid()
KVM: VMX: Add a helper function to retrieve the GPR index for INVPCID, INVVPID, and INVEPT
KVM: nVMX: Clean up x2APIC MSR handling for L2
KVM: VMX: Macrofy the MSR bitmap getters and setters
KVM: nVMX: Handle dynamic MSR intercept toggling
KVM: nVMX: Query current VMCS when determining if MSR bitmaps are in use
KVM: x86: Don't update vcpu->arch.pv_eoi.msr_val when a bogus value was written to MSR_KVM_PV_EOI_EN
KVM: x86: Rename kvm_lapic_enable_pv_eoi()
KVM: x86: Make sure KVM_CPUID_FEATURES really are KVM_CPUID_FEATURES
KVM: x86: Add helper to consolidate core logic of SET_CPUID{2} flows
kvm: mmu: Use fast PF path for access tracking of huge pages when possible
KVM: x86/mmu: Properly dereference rcu-protected TDP MMU sptep iterator
KVM: x86: inhibit APICv when KVM_GUESTDBG_BLOCKIRQ active
kvm: x86: Convert return type of *is_valid_rdpmc_ecx() to bool
KVM: x86: Fix recording of guest steal time / preempted status
selftest: KVM: Add intra host migration tests
selftest: KVM: Add open sev dev helper
...
Pull vm86 fix from Eric Biederman:
"Just the removal of an unnecessary (and incorrect) test from a BUG_ON"
* 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
signal/vm86_32: Remove pointless test in BUG_ON
- Add PCI automatic error recovery.
- Fix tape driver timer initialization broken during timers api cleanup.
- Fix bogus CPU measurement counters values on CPUs offlining.
- Check the validity of subchanel before reading other fields in
the schib in cio code.
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Merge tag 's390-5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull more s390 updates from Vasily Gorbik:
- Add PCI automatic error recovery.
- Fix tape driver timer initialization broken during timers api
cleanup.
- Fix bogus CPU measurement counters values on CPUs offlining.
- Check the validity of subchanel before reading other fields in the
schib in cio code.
* tag 's390-5.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/cio: check the subchannel validity for dev_busid
s390/cpumf: cpum_cf PMU displays invalid value after hotplug remove
s390/tape: fix timer initialization in tape_std_assign()
s390/pci: implement minimal PCI error recovery
PCI: Export pci_dev_lock()
s390/pci: implement reset_slot for hotplug slot
s390/pci: refresh function handle in iomap
* Support for time namespaces in the VDSO, along with some associated
cleanups.
* Support for building rv32 randconfigs.
* Improvements to the XIP port that allow larger kernels to function
* Various device tree cleanups for both the SiFive and Microchip boards
* A handful of defconfig updates, including enabling Nouveau.
There are also various small cleanups.
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Merge tag 'riscv-for-linus-5.16-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
- Support for time namespaces in the VDSO, along with some associated
cleanups.
- Support for building rv32 randconfigs.
- Improvements to the XIP port that allow larger kernels to function
- Various device tree cleanups for both the SiFive and Microchip boards
- A handful of defconfig updates, including enabling Nouveau.
There are also various small cleanups.
* tag 'riscv-for-linus-5.16-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: defconfig: enable DRM_NOUVEAU
riscv/vdso: Drop unneeded part due to merge issue
riscv: remove .text section size limitation for XIP
riscv: dts: sifive: add missing compatible for plic
riscv: dts: microchip: add missing compatibles for clint and plic
riscv: dts: sifive: drop duplicated nodes and properties in sifive
riscv: dts: sifive: fix Unleashed board compatible
riscv: dts: sifive: use only generic JEDEC SPI NOR flash compatible
riscv: dts: microchip: use vendor compatible for Cadence SD4HC
riscv: dts: microchip: drop unused pinctrl-names
riscv: dts: microchip: drop duplicated MMC/SDHC node
riscv: dts: microchip: fix board compatible
riscv: dts: microchip: drop duplicated nodes
dt-bindings: mmc: cdns: document Microchip MPFS MMC/SDHCI controller
riscv: add rv32 and rv64 randconfig build targets
riscv: mm: don't advertise 1 num_asid for 0 asid bits
riscv: set default pm_power_off to NULL
riscv/vdso: Add support for time namespaces
Use null terminated array of test cases rather than the previous sub
test functions.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-11-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Use null terminated array of test cases rather than the previous sub
test functions.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-10-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This doesn't exist in kunit, but will ease the transition from perf
tests.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-9-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add a test case struct mirroring the 'struct kunit_case'. Use the struct
with the DEFINE_SUITE macro, where the single test is turned into a test
case. Update the helpers in builtin-test to handle test cases.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Abstract certain test features so that they can be refactored in later
changes. No functional change.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-7-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This is to align with kunit's terminology.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-6-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Rather than export test functions, export the test struct. Rename with a
suite__ prefix to avoid name collisions.
Committer notes:
Its '&suite__vectors_page', not '&suite__vectors_pages', noticed when
cross building to arm (32-bit).
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
By switching to an array of pointers to tests (later to be suites)
the definition of the tests can be moved to the file containing the
tests.
Committer notes:
It's "&vectors_page", not "&vectors_pages", noticed when cross building
to 32-bit ARM.
Also the DEFINE_SUITE(vectors_page) should be done where its function is
implemented, in tools/perf/arch/arm/tests/vectors-page.c, so that we can
make it static, as we don't have anymore its declaration in tests.h.
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Sohaib Mohamed <sohaib.amhmd@gmail.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Cc: Daniel Latypov <dlatypov@google.com>
Cc: David Gow <davidgow@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20211104064208.3156807-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
We allocate index cookies for each connection from the client.
However, we don't need this index for each channel in case of
multichannel. So making sure that we avoid creating duplicate
cookies by instantiating only for primary channel.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Today, we don't have any way to get the smb session for any
of the secondary channels. Introducing a pointer to the primary
server from server struct of any secondary channel. The value will
be NULL for the server of the primary channel. This will enable us
to get the smb session for any channel.
This will be needed for some of the changes that I'm planning
to make soon.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Introducing a new spin lock to protect all the channel related
fields in a cifs_ses struct. This lock should be taken
whenever dealing with the channel fields, and should be held
only for very short intervals which will not sleep.
Currently, all channel related fields in cifs_ses structure
are protected by session_mutex. However, this mutex is held for
long periods (sometimes while waiting for a reply from server).
This makes the codepath quite tricky to change.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
In cifs_get_smb_ses, if we find an existing matching session,
we should not send a negotiate request for the session if a
session reconnect is not necessary.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
kernel test robot <oliver.sang@intel.com> writes[1]:
>
> Greeting,
>
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: 1a4d21a23c ("signal/vm86_32: Replace open coded BUG_ON with an actual BUG_ON")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> in testcase: trinity
> version: trinity-static-i386-x86_64-1c734c75-1_2020-01-06
> with following parameters:
>
>
> [ 70.645554][ T3747] kernel BUG at arch/x86/kernel/vm86_32.c:109!
> [ 70.646185][ T3747] invalid opcode: 0000 [#1] SMP
> [ 70.646682][ T3747] CPU: 0 PID: 3747 Comm: trinity-c6 Not tainted 5.15.0-rc1-00009-g1a4d21a23c4c #1
> [ 70.647598][ T3747] EIP: save_v86_state (arch/x86/kernel/vm86_32.c:109 (discriminator 3))
> [ 70.648113][ T3747] Code: 89 c3 64 8b 35 60 b8 25 c2 83 ec 08 89 55 f0 8b 96 10 19 00 00 89 55 ec e8 c6 2d 0c 00 fb 8b 55 ec 85 d2 74 05 83 3a 00 75 02 <0f> 0b 8b 86 10 19 00 00 8b 4b 38 8b 78 48 31 cf 89 f8 8b 7a 4c 81
> [ 70.650136][ T3747] EAX: 00000001 EBX: f5f49fac ECX: 0000000b EDX: f610b600
> [ 70.650852][ T3747] ESI: f5f79cc0 EDI: f5f79cc0 EBP: f5f49f04 ESP: f5f49ef0
> [ 70.651593][ T3747] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246
> [ 70.652413][ T3747] CR0: 80050033 CR2: 00004000 CR3: 35fc7000 CR4: 000406d0
> [ 70.653169][ T3747] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
> [ 70.653897][ T3747] DR6: fffe0ff0 DR7: 00000400
> [ 70.654382][ T3747] Call Trace:
> [ 70.654719][ T3747] arch_do_signal_or_restart (arch/x86/kernel/signal.c:792 arch/x86/kernel/signal.c:867)
> [ 70.655288][ T3747] exit_to_user_mode_prepare (kernel/entry/common.c:174 kernel/entry/common.c:209)
> [ 70.655854][ T3747] irqentry_exit_to_user_mode (kernel/entry/common.c:126 kernel/entry/common.c:317)
> [ 70.656450][ T3747] irqentry_exit (kernel/entry/common.c:406)
> [ 70.656897][ T3747] exc_page_fault (arch/x86/mm/fault.c:1535)
> [ 70.657369][ T3747] ? sysvec_kvm_asyncpf_interrupt (arch/x86/mm/fault.c:1488)
> [ 70.657989][ T3747] handle_exception (arch/x86/entry/entry_32.S:1085)
vm86_32.c:109 is: "BUG_ON(!vm86 || !vm86->user_vm86)"
When trying to understand the failure Brian Gerst pointed out[2] that
the code does not need protection against vm86->user_vm86 being NULL.
The copy_from_user code will already handles that case if the address
is going to fault.
Looking futher I realized that if we care about not allowing struct
vm86plus_struct at address 0 it should be do_sys_vm86 (the system
call) that does the filtering. Not way down deep when the emulation
has completed in save_v86_state.
So let's just remove the silly case of attempting to filter a
userspace address with a BUG_ON. Existing userspace can't break and
it won't make the kernel any more attackable as the userspace access
helpers will handle it, if it isn't a good userspace pointer.
I have run the reproducer the fuzzer gave me before I made this change
and it reproduced, and after I made this change and I have not seen
the reported failure. So it does looks like this fixes the reported
issue.
[1] https://lkml.kernel.org/r/20211112074030.GB19820@xsang-OptiPlex-9020
[2] https://lkml.kernel.org/r/CAMzpN2jkK5sAv-Kg_kVnCEyVySiqeTdUORcC=AdG1gV6r8nUew@mail.gmail.com
Suggested-by: Brian Gerst <brgerst@gmail.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Tested-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
- Fix the host S2 finalization by solely iterating over the memblocks
instead of the whole IPA space
- Tighten the return value of kvm_vcpu_preferred_target() now that
32bit support is long gone
- Make sure the extraction of ESR_ELx.EC is limited to the architected
bits
- Comment fixups
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Merge tag 'kvmarm-fixes-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master
KVM/arm64 fixes for 5.16, take #1
- Fix the host S2 finalization by solely iterating over the memblocks
instead of the whole IPA space
- Tighten the return value of kvm_vcpu_preferred_target() now that
32bit support is long gone
- Make sure the extraction of ESR_ELx.EC is limited to the architected
bits
- Comment fixups
If a binary operation is detected while parsing an expression string,
the operand strings are deduced by splitting the experssion string at
the position of the detected binary operator. Both operand strings are
sub-strings (can be empty string) of the expression string but will
never be NULL.
Currently a NULL check is used for missing operands, fix this by
checking for empty strings instead.
Link: https://lkml.kernel.org/r/20211112191324.1302505-1-kaleshsingh@google.com
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Fixes: 9710b2f341 ("tracing: Fix operator precedence for hist triggers expression")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Do not copy the fixed-size char array field of the events over
the field size. The histogram treats char array as a string and
there are 2 types of char array in the event, fixed-size and
dynamic string. The dynamic string (__data_loc) field must be
null terminated, but the fixed-size char array field may not
be null terminated (not a string, but just a data).
In that case, histogram can copy the data after the field.
This uses the original field size for fixed-size char array
field to restrict the histogram not to access over the original
field size.
Link: https://lkml.kernel.org/r/163673292822.195747.3696966210526410250.stgit@devnote2
Fixes: 02205a6752 (tracing: Add support for 'field variables')
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Pull crypto fix from Herbert Xu:
"This fixes a boot crash regression"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: api - Fix boot-up crash when crypto manager is disabled
This series is all the stragglers that didn't quite make the first
merge window pull. It's mostly minor updates and bug fixes of merge
window code but it also has two driver updates: ufs and qla2xxx.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull more SCSI updates from James Bottomley:
"This series is all the stragglers that didn't quite make the first
merge window pull. It's mostly minor updates and bug fixes of merge
window code but it also has two driver updates: ufs and qla2xxx"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (46 commits)
scsi: scsi_debug: Don't call kcalloc() if size arg is zero
scsi: core: Remove command size deduction from scsi_setup_scsi_cmnd()
scsi: scsi_ioctl: Validate command size
scsi: ufs: ufshpb: Properly handle max-single-cmd
scsi: core: Avoid leaving shost->last_reset with stale value if EH does not run
scsi: bsg: Fix errno when scsi_bsg_register_queue() fails
scsi: sr: Remove duplicate assignment
scsi: ufs: ufs-exynos: Introduce ExynosAuto v9 virtual host
scsi: ufs: ufs-exynos: Multi-host configuration for ExynosAuto v9
scsi: ufs: ufs-exynos: Support ExynosAuto v9 UFS
scsi: ufs: ufs-exynos: Add pre/post_hce_enable drv callbacks
scsi: ufs: ufs-exynos: Factor out priv data init
scsi: ufs: ufs-exynos: Add EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR option
scsi: ufs: ufs-exynos: Support custom version of ufs_hba_variant_ops
scsi: ufs: ufs-exynos: Add setup_clocks callback
scsi: ufs: ufs-exynos: Add refclkout_stop control
scsi: ufs: ufs-exynos: Simplify drv_data retrieval
scsi: ufs: ufs-exynos: Change pclk available max value
scsi: ufs: Add quirk to enable host controller without PH configuration
scsi: ufs: Add quirk to handle broken UIC command
...
This set is mostly small fixes and cleanups, so more of a janitorial
update for this cycle.
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Merge tag 'pwm/for-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set is mostly small fixes and cleanups, so more of a janitorial
update for this cycle"
* tag 'pwm/for-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: vt8500: Rename pwm_busy_wait() to make it obviously driver-specific
dt-bindings: pwm: tpu: Add R-Car M3-W+ device tree bindings
dt-bindings: pwm: tpu: Add R-Car V3U device tree bindings
pwm: pwm-samsung: Trigger manual update when disabling PWM
pwm: visconti: Simplify using devm_pwmchip_add()
pwm: samsung: Describe driver in Kconfig
pwm: Make it explicit that pwm_apply_state() might sleep
pwm: Add might_sleep() annotations for !CONFIG_PWM API functions
pwm: atmel: Drop unused header
A collection of fixes for 5.16-rc1, notably for a few regressions
that were found in 5.15 and pre-rc1.
- The revert of the unification of SG-buffer helper functions on
x86 and the relevant fix
- Regression fixes for mmap after the recent code refactoring
- Two NULL dereference fixes in HD-audio controller driver
- UAF fixes in ALSA timer core
- A few usual HD-audio and FireWire quirks
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Merge tag 'sound-fix-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of fixes for 5.16-rc1, notably for a few regressions that
were found in 5.15 and pre-rc1:
- revert of the unification of SG-buffer helper functions on x86 and
the relevant fix
- regression fixes for mmap after the recent code refactoring
- two NULL dereference fixes in HD-audio controller driver
- UAF fixes in ALSA timer core
- a few usual HD-audio and FireWire quirks"
* tag 'sound-fix-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: fireworks: add support for Loud Onyx 1200f quirk
ALSA: hda: fix general protection fault in azx_runtime_idle
ALSA: hda: Free card instance properly at probe errors
ALSA: hda/realtek: Add quirk for HP EliteBook 840 G7 mute LED
ALSA: memalloc: Remove a stale comment
ALSA: synth: missing check for possible NULL after the call to kstrdup
ALSA: memalloc: Use proper SG helpers for noncontig allocations
ALSA: pci: rme: Fix unaligned buffer addresses
ALSA: firewire-motu: add support for MOTU Track 16
ALSA: PCM: Fix NULL dereference at mmap checks
ALSA: hda/realtek: Add quirk for ASUS UX550VE
ALSA: timer: Unconditionally unlink slave instances, too
ALSA: memalloc: Catch call with NULL snd_dma_buffer pointer
Revert "ALSA: memalloc: Convert x86 SG-buffer handling with non-contiguous type"
ALSA: hda/realtek: Add a quirk for Acer Spin SP513-54N
ALSA: firewire-motu: add support for MOTU Traveler mk3
ALSA: hda/realtek: Headset fixup for Clevo NH77HJQ
ALSA: timer: Fix use-after-free problem
Ian Rogers