diff options
| author | John Zhao <john.zhao@intel.com> | 2020-06-26 10:00:02 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2020-07-10 17:33:39 +0000 |
| commit | f6f1f734ee1b6322ebf3913743d5c526be65dc42 (patch) | |
| tree | 2ab3194dbc31cbc4ed5d170a83ab2dab56b4bd92 | |
| parent | 7b1cb0d603ee38470d5571d564c6b4fed5348977 (diff) | |
soc/amd/picasso: Avoid NULL pointer dereference
Coverity detects dereferencing a pointer that might be "NULL" when
calling acpigen_write_scope. Add sanity check for scope to prevent
NULL pointer dereference.
Found-by: Coverity CID 1429980
TEST=None
Signed-off-by: John Zhao <john.zhao@intel.com>
Change-Id: I6214fb83bccb19fe4edad65ce6b862815b8dcec6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42837
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
| -rw-r--r-- | src/soc/amd/picasso/root_complex.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/soc/amd/picasso/root_complex.c b/src/soc/amd/picasso/root_complex.c index 036ff00ccb..1c069282af 100644 --- a/src/soc/amd/picasso/root_complex.c +++ b/src/soc/amd/picasso/root_complex.c @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpigen.h> +#include <assert.h> #include <cbmem.h> #include <console/console.h> #include <cpu/amd/msr.h> @@ -134,14 +135,13 @@ static void read_resources(struct device *dev) static void root_complex_fill_ssdt(const struct device *device) { msr_t msr; + const char *scope; - if (!device) { - printk(BIOS_ERR, "%s: device is NULL! ACPI SSDT will be incomplete.\n", - __func__); - return; - } + assert(device); - acpigen_write_scope(acpi_device_scope(device)); + scope = acpi_device_scope(device); + assert(scope); + acpigen_write_scope(scope); msr = rdmsr(TOP_MEM); acpigen_write_name_dword("TOM1", msr.lo); |