Commit 87b07931 authored by Hillf Danton's avatar Hillf Danton Committed by Greg Kroah-Hartman

mm/mempolicy.c: fix wrong sp_node insertion

commit 5ca39575 upstream.

n->end is accessed in sp_insert(). Thus it should be update
before calling sp_insert(). This mistake may make kernel panic.
Signed-off-by: default avatarHillf Danton <dhillf@gmail.com>
Signed-off-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3479cfd6
......@@ -2386,8 +2386,8 @@ static int shared_policy_replace(struct shared_policy *sp, unsigned long start,
*mpol_new = *n->policy;
atomic_set(&mpol_new->refcnt, 1);
sp_node_init(n_new, n->end, end, mpol_new);
sp_insert(sp, n_new);
n->end = start;
sp_insert(sp, n_new);
n_new = NULL;
mpol_new = NULL;
break;
......
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