linux-stable/fs/debugfs
Johannes Berg 159f5bdadc debugfs: initialize cancellations earlier
Tetsuo Handa pointed out that in the (now reverted)
lockdep commit I initialized the data too late. The
same is true for the cancellation data, it must be
initialized before the cmpxchg(), otherwise it may
be done twice and possibly even overwriting data in
there already when there's a race. Fix that, which
also requires destroying the mutex in case we lost
the race.

Fixes: 8c88a47435 ("debugfs: add API to allow debugfs operations cancellation")
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20231221150444.1e47a0377f80.If7e8ba721ba2956f12c6e8405e7d61e154aa7ae7@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-12-22 07:33:02 +01:00
..
file.c debugfs: initialize cancellations earlier 2023-12-22 07:33:02 +01:00
inode.c Revert "debugfs: annotate debugfs handlers vs. removal with lockdep" 2023-12-04 07:43:16 +01:00
internal.h Revert "debugfs: annotate debugfs handlers vs. removal with lockdep" 2023-12-04 07:43:16 +01:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00