6.6-stable review patch. If anyone has any objections, please let me know.
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From: Kamalesh Babulal kamalesh.babulal@oracle.com
commit 25125a4762835d62ba1e540c1351d447fc1f6c7c upstream.
The update_cpumask(), checks for newly requested cpumask by calling validate_change(), which returns an error on passing an invalid set of cpu(s). Independent of the error returned, update_cpumask() always returns zero, suppressing the error and returning success to the user on writing an invalid cpu range for a cpuset. Fix it by returning retval instead, which is returned by validate_change().
Fixes: 99fe36ba6fc1 ("cgroup/cpuset: Improve temporary cpumasks handling") Signed-off-by: Kamalesh Babulal kamalesh.babulal@oracle.com Reviewed-by: Waiman Long longman@redhat.com Cc: stable@vger.kernel.org # v6.6+ Signed-off-by: Tejun Heo tj@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- kernel/cgroup/cpuset.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1948,7 +1948,7 @@ static int update_cpumask(struct cpuset } out_free: free_cpumasks(NULL, &tmp); - return 0; + return retval; }
/*