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| author | Jiasheng Jiang <jiasheng@iscas.ac.cn> | 2023-03-16 09:55:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-04-05 12:23:42 +0300 |
| commit | c68f08cc745675a17894e1b4a5b5b9700ace6da4 (patch) | |
| tree | b3157313ab29b0243cc63af2cd8987a8491bf47a /drivers/md/dm-stats.h | |
| parent | 1eaa2b7ae90c5a5e05586df310d804de250747d3 (diff) | |
| download | linux-c68f08cc745675a17894e1b4a5b5b9700ace6da4.tar.xz | |
dm stats: check for and propagate alloc_percpu failure
commit d3aa3e060c4a80827eb801fc448debc9daa7c46b upstream.
Check alloc_precpu()'s return value and return an error from
dm_stats_init() if it fails. Update alloc_dev() to fail if
dm_stats_init() does.
Otherwise, a NULL pointer dereference will occur in dm_stats_cleanup()
even if dm-stats isn't being actively used.
Fixes: fd2ed4d25270 ("dm: add statistics support")
Cc: stable@vger.kernel.org
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-stats.h')
| -rw-r--r-- | drivers/md/dm-stats.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-stats.h b/drivers/md/dm-stats.h index 2ddfae678f32..dcac11fce03b 100644 --- a/drivers/md/dm-stats.h +++ b/drivers/md/dm-stats.h @@ -22,7 +22,7 @@ struct dm_stats_aux { unsigned long long duration_ns; }; -void dm_stats_init(struct dm_stats *st); +int dm_stats_init(struct dm_stats *st); void dm_stats_cleanup(struct dm_stats *st); struct mapped_device; |