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| author | SeongJae Park <sj@kernel.org> | 2023-11-07 00:34:07 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-11-16 00:30:09 +0100 |
| commit | 84055688b6bc075c92a88e2d6c3ad26ab93919f9 (patch) | |
| tree | 445c74fa0ee16c9d64f220cdc43b288d7b84c8fa /mm | |
| parent | mm/damon/sysfs: check error from damon_sysfs_update_target() (diff) | |
| download | linux-84055688b6bc075c92a88e2d6c3ad26ab93919f9.tar.xz linux-84055688b6bc075c92a88e2d6c3ad26ab93919f9.zip | |
mm/damon/sysfs-schemes: handle tried regions sysfs directory allocation failure
DAMOS tried regions sysfs directory allocation function
(damon_sysfs_scheme_regions_alloc()) is not handling the memory allocation
failure. In the case, the code will dereference NULL pointer. Handle the
failure to avoid such invalid access.
Link: https://lkml.kernel.org/r/20231106233408.51159-3-sj@kernel.org
Fixes: 9277d0367ba1 ("mm/damon/sysfs-schemes: implement scheme region directory")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org> [6.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/damon/sysfs-schemes.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/damon/sysfs-schemes.c b/mm/damon/sysfs-schemes.c index 45bd0fd4a8b1..7413cb35c5a9 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -162,6 +162,9 @@ damon_sysfs_scheme_regions_alloc(void) struct damon_sysfs_scheme_regions *regions = kmalloc(sizeof(*regions), GFP_KERNEL); + if (!regions) + return NULL; + regions->kobj = (struct kobject){}; INIT_LIST_HEAD(®ions->regions_list); regions->nr_regions = 0; |