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powerpc/numa: Avoid possible reference beyond prop. length in find_min_common_depth()

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find_min_common_depth() was checking the property length incorrectly.
The value is in bytes not cells, and it is using the second entry.

Signed-off-By: Milton Miller <miltonm@bga.com>

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Milton Miller 2009-01-08 02:19:43 +00:00 committed by Benjamin Herrenschmidt
parent 6a4d7a90fc
commit 20fcefe5a0
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/mm/numa.c
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@ -289,7 +289,7 @@ static int __init find_min_common_depth(void)
ref_points = of_get_property(rtas_root, ref_points = of_get_property(rtas_root,
"ibm,associativity-reference-points", &len); "ibm,associativity-reference-points", &len);
if ((len >= 1) && ref_points) { if ((len >= 2 * sizeof(unsigned int)) && ref_points) {
depth = ref_points[1]; depth = ref_points[1];
} else { } else {
dbg("NUMA: ibm,associativity-reference-points not found.\n"); dbg("NUMA: ibm,associativity-reference-points not found.\n");