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 18:57:27 +0200 |
| commit | 1b42503211ca46711655b834d797f068b1abe59e (patch) | |
| tree | c573aa0e77d975bd3deee4747b34e6d030d98e4b /net | |
| parent | ef9744a0218f1fce1d5244b911057b092ad51e39 (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 'net')
0 files changed, 0 insertions, 0 deletions