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| author | Aaron Durbin | 2007-05-17 07:11:06 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2007-05-17 14:23:04 +0200 |
| commit | f363d16fbb9374c0bd7f2757d412c287169094c9 (patch) | |
| tree | fc706493c5cca046934de190056756f7ce02422f | |
| parent | Slab allocators: define common size limitations (diff) | |
| download | kernel-qcow2-linux-f363d16fbb9374c0bd7f2757d412c287169094c9.tar.gz kernel-qcow2-linux-f363d16fbb9374c0bd7f2757d412c287169094c9.tar.xz kernel-qcow2-linux-f363d16fbb9374c0bd7f2757d412c287169094c9.zip | |
acpi: fix potential call to a freed memory section.
Strip __cpuinit[data] from Node <-> PXM routines and supporting data
structures. Also make pxm_to_node_map and node_to_pxm_map local to the
numa acpi module.
This fixes a bug triggered by the following conditions:
- boot on a machine with a SLIT table defined
- kernel is configured w/ CONFIG_HOTPLUG_CPU=n
- cat /sys/devices/system/node/node*/distance
This will cause an oops by calling into a freed memory section.
In particular, on x86_64, __node_distance calls node_to_pxm().
Signed-off-by: Aaron Durbin <adurbin@google.com>
Cc: Len Brown <lenb@kernel.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/acpi/numa.c | 8 | ||||
| -rw-r--r-- | include/acpi/acpi_numa.h | 7 |
2 files changed, 6 insertions, 9 deletions
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index 8fcd6a15517f..a2efae8a4c4e 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -40,19 +40,19 @@ static nodemask_t nodes_found_map = NODE_MASK_NONE; #define NID_INVAL -1 /* maps to convert between proximity domain and logical node ID */ -int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS] +static int pxm_to_node_map[MAX_PXM_DOMAINS] = { [0 ... MAX_PXM_DOMAINS - 1] = NID_INVAL }; -int __cpuinitdata node_to_pxm_map[MAX_NUMNODES] +static int node_to_pxm_map[MAX_NUMNODES] = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL }; -int __cpuinit pxm_to_node(int pxm) +int pxm_to_node(int pxm) { if (pxm < 0) return NID_INVAL; return pxm_to_node_map[pxm]; } -int __cpuinit node_to_pxm(int node) +int node_to_pxm(int node) { if (node < 0) return PXM_INVAL; diff --git a/include/acpi/acpi_numa.h b/include/acpi/acpi_numa.h index f9d2bde9a7bb..b62cd36ff324 100644 --- a/include/acpi/acpi_numa.h +++ b/include/acpi/acpi_numa.h @@ -11,11 +11,8 @@ #define MAX_PXM_DOMAINS (256) /* Old pxm spec is defined 8 bit */ #endif -extern int __cpuinitdata pxm_to_node_map[MAX_PXM_DOMAINS]; -extern int __cpuinitdata node_to_pxm_map[MAX_NUMNODES]; - -extern int __cpuinit pxm_to_node(int); -extern int __cpuinit node_to_pxm(int); +extern int pxm_to_node(int); +extern int node_to_pxm(int); extern int __cpuinit acpi_map_pxm_to_node(int); extern void __cpuinit acpi_unmap_pxm_to_node(int); |