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selftests/cgroup: Fix cg_run_in_subcgroups ignoring arg parameter

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cg_run_in_subcgroups() discards its arg and always passes NULL to cg_run(),
turning the (void *)100 from test_kmem_dead_cgroups() into NULL so no
allocation occurs.

This makes test_kmem_dead_cgroups() falsely pass without exercising the
"dying cgroup with charged slab" scenario it intends to test.

Pass the arg through to cg_run() to fix this.

Fixes: 933dc80ec2 ("kselftests: cgroup: add kernel memory accounting tests")
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Reviewed-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Hongfu Li 2026-08-20 15:09:44 +08:00 committed by Tejun Heo
parent 0c893d170f
commit a8c6daab4b
1 changed files with 1 additions and 1 deletions
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2
tools/testing/selftests/cgroup/test_kmem.c
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@ -145,7 +145,7 @@ static int cg_run_in_subcgroups(const char *parent,
return -1;
}
if (cg_run(child, fn, NULL)) {
if (cg_run(child, fn, arg)) {
cg_destroy(child);
free(child);
return -1;