Commit 5ca39575 authored by Hillf Danton's avatar Hillf Danton Committed by Linus Torvalds

mm/mempolicy.c: fix wrong sp_node insertion

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>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 88b9e456
...@@ -2391,8 +2391,8 @@ static int shared_policy_replace(struct shared_policy *sp, unsigned long start, ...@@ -2391,8 +2391,8 @@ static int shared_policy_replace(struct shared_policy *sp, unsigned long start,
*mpol_new = *n->policy; *mpol_new = *n->policy;
atomic_set(&mpol_new->refcnt, 1); atomic_set(&mpol_new->refcnt, 1);
sp_node_init(n_new, n->end, end, mpol_new); sp_node_init(n_new, n->end, end, mpol_new);
sp_insert(sp, n_new);
n->end = start; n->end = start;
sp_insert(sp, n_new);
n_new = NULL; n_new = NULL;
mpol_new = NULL; mpol_new = NULL;
break; break;
......
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