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Date: Mon, 28 Oct 2013 14:04:19 +0800 From: RUC_SoftSec <rucsoftsec@...il.com> To: Len Brown <lenb@...nel.org>, "Rafael J. Wysocki" <rjw@...ysocki.net> Cc: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>, RUC_SoftSec <rucsoftsec@...il.com> Subject: [PATCH 1/1] acpi: check return value of acpi_os_map_memory Function acpi_os_map_memory() may return a NULL pointer, it should be validated non-NULL before used. This bug is found by a static tool developed by RUC_SoftSec, supported by China.X.Orion. Signed-off-by: RUC_SoftSec <rucsoftsec@...il.com> --- drivers/acpi/osl.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index e5f416c..bf8f93f 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -717,6 +717,8 @@ acpi_os_physical_table_override(struct acpi_table_header *existing_table, table = acpi_os_map_memory(acpi_tables_addr + table_offset, ACPI_HEADER_SIZE); + if (table == NULL) + return AE_OK; if (table_offset + table->length > all_tables_size) { acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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