| From | Greg Kroah-Hartman <> | Subject | [ 066/100] mm/mempolicy.c: fix wrong sp_node insertion | Date | Tue, 12 Mar 2013 15:31:51 -0700 |
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3.8-stable review patch. If anyone has any objections, please let me know.
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From: Hillf Danton <dhillf@gmail.com>
commit 5ca3957510b9fc2a14d3647db518014842f9a2b4 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: Hillf Danton <dhillf@gmail.com> Signed-off-by: KOSAKI 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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- mm/mempolicy.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -2386,8 +2386,8 @@ restart: *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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