diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2020-07-08 12:25:20 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2020-07-08 12:50:51 -0400 |
| commit | 6958c1c640af8c3f40fa8a2eee3b5b905d95b677 (patch) | |
| tree | 3ad740210f4672ce601d1f994b6eb8fcaa6f88ee /include/linux/device-mapper.h | |
| parent | 174364f6a8979655f71b04b6492657aec3762703 (diff) | |
dm: use noio when sending kobject event
kobject_uevent may allocate memory and it may be called while there are dm
devices suspended. The allocation may recurse into a suspended device,
causing a deadlock. We must set the noio flag when sending a uevent.
The observed deadlock was reported here:
https://www.redhat.com/archives/dm-devel/2020-March/msg00025.html
Reported-by: Khazhismel Kumykov <khazhy@google.com>
Reported-by: Tahsin Erdogan <tahsin@google.com>
Reported-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'include/linux/device-mapper.h')
0 files changed, 0 insertions, 0 deletions