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| author | Jeff Layton <jlayton@kernel.org> | 2024-02-18 08:33:28 -0500 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-02-20 09:53:33 +0100 |
| commit | 14786d949a3b8cf00cc32456363b7db22894a0e6 (patch) | |
| tree | 01ad61ea133dd50892b29e906d3e19234ff1c840 /fs/locks.c | |
| parent | 582a3bf999df662c0e0fa4717ce7559f16d7b93b (diff) | |
| download | linux-14786d949a3b8cf00cc32456363b7db22894a0e6.tar.gz linux-14786d949a3b8cf00cc32456363b7db22894a0e6.tar.bz2 linux-14786d949a3b8cf00cc32456363b7db22894a0e6.zip | |
filelock: fix deadlock detection in POSIX locking
The FL_POSIX check in __locks_insert_block was inadvertantly broken
recently and is now inserting only OFD locks instead of only legacy
POSIX locks.
This breaks deadlock detection in POSIX locks, and may also be the root
cause of a performance regression noted by the kernel test robot.
Restore the proper sense of the test.
Fixes: b6be3714005c ("filelock: convert __locks_insert_block, conflict and deadlock checks to use file_lock_core")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202402181229.f8147f40-oliver.sang@intel.com
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Link: https://lore.kernel.org/r/20240218-flsplit4-v1-1-26454fc090f2@kernel.org
Reviewed-by: NeilBrown <neilb@suse.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/locks.c')
| -rw-r--r-- | fs/locks.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/locks.c b/fs/locks.c index 26d52ef5314a..90c8746874de 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -812,7 +812,7 @@ new_blocker: list_add_tail(&waiter->flc_blocked_member, &blocker->flc_blocked_requests); - if ((blocker->flc_flags & (FL_POSIX|FL_OFDLCK)) == (FL_POSIX|FL_OFDLCK)) + if ((blocker->flc_flags & (FL_POSIX|FL_OFDLCK)) == FL_POSIX) locks_insert_global_blocked(waiter); /* The requests in waiter->flc_blocked are known to conflict with |