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ACPI / tables: Check if id is NULL in acpi_table_parse()

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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>
This commit is contained in:
tangchen 2014-01-06 16:43:54 +08:00 committed by Rafael J. Wysocki
parent 6a368751d5
commit de2d1a7e93
1 changed files with 1 additions and 1 deletions
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2
drivers/acpi/tables.c
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@ -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)