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| author | Eric Biggers <ebiggers@google.com> | 2019-08-21 22:54:41 -0700 |
|---|---|---|
| committer | Casey Schaufler <casey@schaufler-ca.com> | 2019-09-04 09:37:07 -0700 |
| commit | e5bfad3d7acc5702f32aafeb388362994f4d7bd0 (patch) | |
| tree | c9daa0267c2dd110e5a8ccbed94ac8c8edb9c6e6 /lib/locking-selftest-rtmutex.h | |
| parent | 3f4287e7d98a2954f20bf96c567fdffcd2b63eb9 (diff) | |
smack: use GFP_NOFS while holding inode_smack::smk_lock
inode_smack::smk_lock is taken during smack_d_instantiate(), which is
called during a filesystem transaction when creating a file on ext4.
Therefore to avoid a deadlock, all code that takes this lock must use
GFP_NOFS, to prevent memory reclaim from waiting for the filesystem
transaction to complete.
Reported-by: syzbot+0eefc1e06a77d327a056@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'lib/locking-selftest-rtmutex.h')
0 files changed, 0 insertions, 0 deletions