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| author | Mikulas Patocka <mpatocka@redhat.com> | 2020-07-08 12:25:20 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-16 08:13:33 +0200 |
| commit | 75c19a53cf68735b42c64b50c5174310fb40ffc1 (patch) | |
| tree | d3a863f007e5d44cc3bdfbdb927bf93b372ae575 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | fab3c82266a1ca1215b22c51722e44a01bc8791f (diff) | |
| download | linux-stable-75c19a53cf68735b42c64b50c5174310fb40ffc1.tar.gz linux-stable-75c19a53cf68735b42c64b50c5174310fb40ffc1.tar.bz2 linux-stable-75c19a53cf68735b42c64b50c5174310fb40ffc1.zip | |
dm: use noio when sending kobject event
commit 6958c1c640af8c3f40fa8a2eee3b5b905d95b677 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions