diff options
| author | John Zhao <john.zhao@intel.com> | 2019-05-29 18:12:01 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-06-03 13:25:25 +0000 |
| commit | 2deb5fb3b07e07ee3d0d142723e2a25f5982d417 (patch) | |
| tree | e522061361efe4130f9df8693d7e902a42fd5f56 /src/device | |
| parent | 62ddc491cf8c8c6412177d2866bec89c6f4906dc (diff) | |
src/device: Prevent attack on null pointer dereference
Clang Static Analyzer version 8.0.0 detects access to field dev results
in a dereference of a null pointer which is loaded from variable bus.
Add sanity check for pointer bus to prevent null pointer dereference.
TEST=Built and boot up to kernel.
Change-Id: I084906c33065eaa834f50c545efcfab620658ec9
Signed-off-by: John Zhao <john.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33101
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Diffstat (limited to 'src/device')
| -rw-r--r-- | src/device/device.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/device/device.c b/src/device/device.c index 1b4255bffe..17cd8f4ab8 100644 --- a/src/device/device.c +++ b/src/device/device.c @@ -340,6 +340,9 @@ static void compute_resources(struct bus *bus, struct resource *bridge, resource_t base; base = round(bridge->base, bridge->align); + if (!bus) + return; + printk(BIOS_SPEW, "%s %s: base: %llx size: %llx align: %d gran: %d" " limit: %llx\n", dev_path(bus->dev), resource2str(bridge), base, bridge->size, bridge->align, @@ -484,6 +487,9 @@ static void allocate_resources(struct bus *bus, struct resource *bridge, resource_t base; base = bridge->base; + if (!bus) + return; + printk(BIOS_SPEW, "%s %s: base:%llx size:%llx align:%d gran:%d " "limit:%llx\n", dev_path(bus->dev), resource2str(bridge), |