* [PATCH] acpi: check for pxm_to_node_map overflow
@ 2009-02-28 15:17 Cyrill Gorcunov
0 siblings, 0 replies; only message in thread
From: Cyrill Gorcunov @ 2009-02-28 15:17 UTC (permalink / raw)
To: Len Brown; +Cc: Andrew Morton, LKML
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.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
CC: Len Brown <lenb@kernel.org>
---
It's a patch resend. I didn't get any response on
previous submission from Len, oh :(
Len is the patch really not needed or such a situation
can't happen?
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
@@ -277,7 +277,7 @@ 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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