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 18:55:22 +0200 |
| commit | 416a5d0346696d7d70ffeb5e51a911e6709c6575 (patch) | |
| tree | fd82c2933088166f823ad17ddd2e695a41fb44a3 /scripts/xen-hypercalls.sh | |
| parent | ca2cf05447866c4653243bfe3ce4d1114eaee953 (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 'scripts/xen-hypercalls.sh')
0 files changed, 0 insertions, 0 deletions