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selftests/lsm: Fix memory leak in attr_lsm_count

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The calloc-allocated buffer in attr_lsm_count() is never released on
any exit path, including both the normal return path and the early
return when read_sysfs_lsms fails, resulting in a heap memory leak.

Add free() for the buffer on all return branches to fix the leak.

Fixes: d3d929a8b0 ("LSM: selftests for Linux Security Module syscalls")
Signed-off-by: Wang Yan <wangyan01@kylinos.cn>
Reviewed-by: William Roberts <bill.c.roberts@gmail.com>
Tested-by: William Roberts <bill.c.roberts@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Wang Yan 2026-07-03 20:09:51 +08:00 committed by Paul Moore
parent 15c1f17979
commit 0cee720cfd
1 changed files with 3 additions and 1 deletions
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4
tools/testing/selftests/lsm/common.c
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@ -76,7 +76,7 @@ int attr_lsm_count(void)
return 0;
if (read_sysfs_lsms(names, sysconf(_SC_PAGESIZE)))
return 0;
goto out;
if (strstr(names, "selinux"))
count++;
@ -85,5 +85,7 @@ int attr_lsm_count(void)
if (strstr(names, "apparmor"))
count++;
out:
free(names);
return count;
}