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Avoid a possible segfault.
Noticed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

(cherry picked from commit 8c79bae6

)
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>