android/android_kernel_samsung_sm8650
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

UPSTREAM: mm/damon/sysfs-schemes: handle tried region directory allocation failure

Browse Source 
DAMON sysfs interface's before_damos_apply callback
(damon_sysfs_before_damos_apply()), which creates the DAMOS tried regions
for each DAMOS action applied region, is not handling the allocation
failure for the sysfs directory data.  As a result, NULL pointer
derefeence is possible.  Fix it by handling the case.

Link: https://lkml.kernel.org/r/20231106233408.51159-4-sj@kernel.org
Fixes: f1d13cacabe1 ("mm/damon/sysfs: implement DAMOS tried regions update command")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>	[6.2+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

(cherry picked from commit ae636ae2bbfd9279f5681dbf320d1da817e52b68)

Bug: 300502883
Change-Id: I98568f4b0cee9fea82f4fe6d3e7a505370c3c304
Signed-off-by: cui yangpei <cuiyangpei@xiaomi.com>
This commit is contained in:
SeongJae Park 2023-11-06 23:34:08 +00:00 committed by Suren Baghdasaryan
parent 1cedfc05e9
commit 31c59d59c7
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
mm/damon/sysfs-schemes.c
View File

@ -1344,6 +1344,8 @@ static int damon_sysfs_before_damos_apply(struct damon_ctx *ctx,
return 0;
region = damon_sysfs_scheme_region_alloc(r);
if (!region)
return 0;
list_add_tail(&region->list, &sysfs_regions->regions_list);
sysfs_regions->nr_regions++;
if (kobject_init_and_add(&region->kobj,