Messages in this thread Patch in this message |  | | | Date | Fri, 02 Jan 2009 11:27:20 +0300 | | From | Cyrill Gorcunov <> | | Subject | [patch 3/3] acpi: check for pxm_to_node_map overflow |
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It is hardly (if ever) possible but in case of broken _PXM entry we could reach out of pxm_to_node_map array bounds in acpi_map_pxm_to_node() call. Lets check it (it's not that expensive and safe).
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> CC: Len Brown <lenb@kernel.org> --- drivers/acpi/numa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6.git/drivers/acpi/numa.c =================================================================== --- linux-2.6.git.orig/drivers/acpi/numa.c +++ linux-2.6.git/drivers/acpi/numa.c @@ -278,7 +278,7 @@ int acpi_get_node(acpi_handle *handle) int pxm, node = -1; pxm = acpi_get_pxm(handle); - if (pxm >= 0) + if (pxm >= 0 && pxm < MAX_PXM_DOMAINS) node = acpi_map_pxm_to_node(pxm); return node; --
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