oom: fix NULL pointer dereference

Commit b940fd7035 ("oom: remove unnecessary code and cleanup") added an
unnecessary NULL pointer dereference.  remove it.

Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 5014e50644d1..17d48a67e7b7 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -401,10 +401,9 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order,
 static int oom_kill_task(struct task_struct *p, struct mem_cgroup *mem)
 {
         p = find_lock_task_mm(p);
-        if (!p) {
-                task_unlock(p);
+        if (!p)
                 return 1;
-        }
+
         pr_err("Killed process %d (%s) total-vm:%lukB, anon-rss:%lukB, file-rss:%lukB\n",
                 task_pid_nr(p), p->comm, K(p->mm->total_vm),
                 K(get_mm_counter(p->mm, MM_ANONPAGES)),