diff options
| author | John Zhao <john.zhao@intel.com> | 2020-06-26 09:38:04 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-06-30 05:58:55 +0000 |
| commit | 3d6066eaccb641e001ab28a4b46d8f7f0e827f89 (patch) | |
| tree | f65e23ff22bd7c7fbdc3a3c4fe953206cdf80cf9 /src/soc/intel/tigerlake/pmc.c | |
| parent | ff4ead052b8e4706e2480e62b68c46df8bd8a7c2 (diff) | |
soc/intel/tigerlake: Avoid NULL pointer dereference
Coverity detects dereferencing pointers that might be "NULL" when
calling acpigen_write_scope and acpigen_write_device. Add sanity
check for both of scope and name to prevent NULL pointer dereference.
Found-by: Coverity CID 1429981
TEST=Built and boot up to kernel.
Signed-off-by: John Zhao <john.zhao@intel.com>
Change-Id: Iea3801585e8c294fb889a8137b534bb932696025
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42836
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/tigerlake/pmc.c')
| -rw-r--r-- | src/soc/intel/tigerlake/pmc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/soc/intel/tigerlake/pmc.c b/src/soc/intel/tigerlake/pmc.c index b98cbbe797..8fcbe50504 100644 --- a/src/soc/intel/tigerlake/pmc.c +++ b/src/soc/intel/tigerlake/pmc.c @@ -99,8 +99,13 @@ static void soc_pmc_read_resources(struct device *dev) static void soc_pmc_fill_ssdt(const struct device *dev) { - acpigen_write_scope(acpi_device_scope(dev)); - acpigen_write_device(acpi_device_name(dev)); + const char *scope = acpi_device_scope(dev); + const char *name = acpi_device_name(dev); + if (!scope || !name) + return; + + acpigen_write_scope(scope); + acpigen_write_device(name); acpigen_write_name_string("_HID", PMC_HID); acpigen_write_name_string("_DDN", "Intel(R) Tiger Lake IPC Controller"); |