diff options
| author | Christoph Lameter | 2012-01-17 16:27:31 +0100 |
|---|---|---|
| committer | Pekka Enberg | 2012-02-06 11:24:13 +0100 |
| commit | 66c4c35c6bc5a1a452b024cf0364635b28fd94e4 (patch) | |
| tree | 75fa5528d28fdedde489e4d9ebc4a961aeecd6f0 /mm/bounce.c | |
| parent | slub: prefetch next freelist pointer in slab_alloc() (diff) | |
| download | kernel-qcow2-linux-66c4c35c6bc5a1a452b024cf0364635b28fd94e4.tar.gz kernel-qcow2-linux-66c4c35c6bc5a1a452b024cf0364635b28fd94e4.tar.xz kernel-qcow2-linux-66c4c35c6bc5a1a452b024cf0364635b28fd94e4.zip | |
slub: Do not hold slub_lock when calling sysfs_slab_add()
sysfs_slab_add() calls various sysfs functions that actually may
end up in userspace doing all sorts of things.
Release the slub_lock after adding the kmem_cache structure to the list.
At that point the address of the kmem_cache is not known so we are
guaranteed exlusive access to the following modifications to the
kmem_cache structure.
If the sysfs_slab_add fails then reacquire the slub_lock to
remove the kmem_cache structure from the list.
Cc: <stable@vger.kernel.org> # 3.3+
Reported-by: Sasha Levin <levinsasha928@gmail.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/bounce.c')
0 files changed, 0 insertions, 0 deletions