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authortangchen <tangchen@cn.fujitsu.com>2014-01-06 12:43:54 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-01-06 15:33:05 +0400
commitde2d1a7e9310c4d1464faf469c737f08b5608600 (patch)
treeae884687c79a68cd9ed28f01813402ba6f5dbe16 /drivers/acpi/tables.c
parent6a368751d54ed80e6ba868c29a04ad5118fe104b (diff)
downloadlinux-de2d1a7e9310c4d1464faf469c737f08b5608600.tar.xz
ACPI / tables: Check if id is NULL in acpi_table_parse()
strncmp() does not check if the params are NULL. In acpi_table_parse(), if @id is NULL, the kernel will panic. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Acked-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/tables.c')
-rw-r--r--drivers/acpi/tables.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 4ec44258e4ff..a17619bfb57b 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -293,7 +293,7 @@ int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
if (acpi_disabled)
return -ENODEV;
- if (!handler)
+ if (!id || !handler)
return -EINVAL;
if (strncmp(id, ACPI_SIG_MADT, 4) == 0)