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| author |   Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2022-05-22 16:18:51 +0200 |
|---|---|---|
| committer |   akpm <akpm@linux-foundation.org> | 2022-05-25 10:47:46 -0700 |
| commit | 7fb6378701dc0d8f19c1ac4623b55f5125f0e286 (patch) | |
| tree | d656a551f8fa21aff4cb33e27893cda376384cb4 | |
| parent | mm: damon: use HPAGE_PMD_SIZE (diff) | |
| download | linux-dev-7fb6378701dc0d8f19c1ac4623b55f5125f0e286.tar.xz linux-dev-7fb6378701dc0d8f19c1ac4623b55f5125f0e286.zip | |
cgroup: fix an error handling path in alloc_pagecache_max_30M()
If the first goto is taken, 'fd' is not opened yet (and is un-initialized).
So a direct return is safer.
Link: https://lkml.kernel.org/r/628312312eb40e0e39463a2c06415fde5295c716.1653229120.git.christophe.jaillet@wanadoo.fr
Fixes: c1a31a2f7a9c ("cgroup: fix racy check in alloc_pagecache_max_30M() helper function")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan.x@bytedance.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: David Vernet <void@manifault.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | tools/testing/selftests/cgroup/test_memcontrol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/cgroup/test_memcontrol.c b/tools/testing/selftests/cgroup/test_memcontrol.c index 6ab94317c87b..44a974ec472c 100644 --- a/tools/testing/selftests/cgroup/test_memcontrol.c +++ b/tools/testing/selftests/cgroup/test_memcontrol.c @@ -574,7 +574,7 @@ static int alloc_pagecache_max_30M(const char *cgroup, void *arg) high = cg_read_long(cgroup, "memory.high"); max = cg_read_long(cgroup, "memory.max"); if (high != MB(30) && max != MB(30)) - goto cleanup; + return -1; fd = get_temp_fd(); if (fd < 0) |