diff options
| author | Eric Biggers <ebiggers@google.com> | 2019-08-21 22:54:41 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 21:01:07 +0200 |
| commit | ac375073bb395750edd1652e420131acfc5b08d5 (patch) | |
| tree | fcb61149bbef169538f0091acbd1016a4c29fb0c /arch/m32r/kernel/process.c | |
| parent | cfaf71c99319a0ebec6f736ac5b400099257ae1b (diff) | |
smack: use GFP_NOFS while holding inode_smack::smk_lock
commit e5bfad3d7acc5702f32aafeb388362994f4d7bd0 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/m32r/kernel/process.c')
0 files changed, 0 insertions, 0 deletions