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author | SeongJae Park <sj@kernel.org> | 2023-11-07 02:34:07 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-11-28 20:19:58 +0300 |
commit | 76801f32d963e5854ea69fb9821d2d86b62790b9 (patch) | |
tree | 057cbc25abd3af28a0220daaff796ce40bc46fb1 | |
parent | 0bf5055d5d33133c3a7cc5e4032eeb0ba7832c44 (diff) | |
download | linux-76801f32d963e5854ea69fb9821d2d86b62790b9.tar.xz |
mm/damon/sysfs-schemes: handle tried regions sysfs directory allocation failure
commit 84055688b6bc075c92a88e2d6c3ad26ab93919f9 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-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 13e29fe065ab..36dcd881a19c 100644 --- a/mm/damon/sysfs-schemes.c +++ b/mm/damon/sysfs-schemes.c @@ -126,6 +126,9 @@ 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; |