The patch titled
ata: piix, fix pointer deref on suspend
has been added to the -mm tree. Its filename is
ata-piix-fix-pointer-deref-on-suspend.patch
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------------------------------------------------------
Subject: ata: piix, fix pointer deref on suspend
From: Jiri Slaby <jirislaby@xxxxxxxxx>
Commit
ata_piix: add borked Tecra M4 to broken suspend list
introduced DMI variables checking, but they can be null, so that
we possibly dereference null.
Check if they are null and avoid checks in that case.
Solves:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
IP: [<ffffffff8043da97>] piix_pci_device_suspend+0x117/0x230
Signed-off-by: Jiri Slaby <jirislaby@xxxxxxxxx>
Cc: Jeff Garzik <jgarzik@xxxxxxxxxx>
Cc: Alexandru Romanescu <a_romanescu@xxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/ata/ata_piix.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff -puN drivers/ata/ata_piix.c~ata-piix-fix-pointer-deref-on-suspend drivers/ata/ata_piix.c
--- a/drivers/ata/ata_piix.c~ata-piix-fix-pointer-deref-on-suspend
+++ a/drivers/ata/ata_piix.c
@@ -1072,7 +1072,14 @@ static int piix_broken_suspend(void)
* matching is necessary because dmi_system_id.matches is
* limited to four entries.
*/
- if (!strcmp(dmi_get_system_info(DMI_SYS_VENDOR), "TOSHIBA") &&
+ if (dmi_get_system_info(DMI_SYS_VENDOR) &&
+ dmi_get_system_info(DMI_PRODUCT_NAME) &&
+ dmi_get_system_info(DMI_PRODUCT_VERSION) &&
+ dmi_get_system_info(DMI_PRODUCT_SERIAL) &&
+ dmi_get_system_info(DMI_BOARD_VENDOR) &&
+ dmi_get_system_info(DMI_BOARD_NAME) &&
+ dmi_get_system_info(DMI_BOARD_VERSION) &&
+ !strcmp(dmi_get_system_info(DMI_SYS_VENDOR), "TOSHIBA") &&
!strcmp(dmi_get_system_info(DMI_PRODUCT_NAME), "000000") &&
!strcmp(dmi_get_system_info(DMI_PRODUCT_VERSION), "000000") &&
!strcmp(dmi_get_system_info(DMI_PRODUCT_SERIAL), "000000") &&
_
Patches currently in -mm which might be from jirislaby@xxxxxxxxx are
linux-next.patch
ata-piix-fix-pointer-deref-on-suspend.patch
drivers-char-cycladesc-cy_pci_probe-fix-error-path.patch
reiser4.patch
shrink_slab-handle-bad-shrinkers.patch
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