Commit 800416f7 authored Oct 27, 2010 by Eric Dumazet Committed by Linus Torvalds Oct 28, 2010

numa: fix slab_node(MPOL_BIND)



When a node contains only HighMem memory, slab_node(MPOL_BIND)
dereferences a NULL pointer.

[ This code seems to go back all the way to commit 19770b32: "mm:
  filter based on a nodemask as well as a gfp_mask".  Which was back in
  April 2008, and it got merged into 2.6.26.  - Linus ]

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 0851668f

mm/mempolicy.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1597,7 +1597,7 @@ unsigned slab_node(struct mempolicy *policy)
		(void)first_zones_zonelist(zonelist, highest_zoneidx,
		&policy->v.nodes,
		&zone);
		return zone->node;
		return zone ? zone->node : numa_node_id();
		}

		default:

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