the result of cgroup_file_name will be used by kernfs_remove_name, and then by kernfs_remove_by_name_ns(). If reached the max length, may have problem printed by WARN() in kernfs_remove_by_name_ns().
Signed-off-by: Ma Shimiao <[email protected]> --- kernel/cgroup/cgroup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 0b1ffe147f24..7f588d1617c5 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -1397,7 +1397,7 @@ static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft, cgroup_on_dfl(cgrp) ? ss->name : ss->legacy_name, cft->name); else - strncpy(buf, cft->name, CGROUP_FILE_NAME_MAX); + strncpy(buf, cft->name, CGROUP_FILE_NAME_MAX - 1); return buf; } -- 2.13.6
