diff options
| author | John Zhao <john.zhao@intel.com> | 2020-07-14 09:07:48 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-07-26 21:04:51 +0000 |
| commit | acdf5fd66ea12c3365271686371bc1d225c3f3af (patch) | |
| tree | cc009f6fd141eb021b05a5425a9230baaa8de1aa /src | |
| parent | f09b4b6beed16d964527d26700df6d350e3aeab0 (diff) | |
drivers/usb: 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 1430454
TEST=Built and boot up to kernel on Volteer.
Signed-off-by: John Zhao <john.zhao@intel.com>
Change-Id: I8ece3831bbd2641ceafbd71b9dc3db7e04a8eae4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43449
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
| -rw-r--r-- | src/drivers/usb/pci_xhci/pci_xhci.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/src/drivers/usb/pci_xhci/pci_xhci.c b/src/drivers/usb/pci_xhci/pci_xhci.c index b787127c2f..a375f07a8d 100644 --- a/src/drivers/usb/pci_xhci/pci_xhci.c +++ b/src/drivers/usb/pci_xhci/pci_xhci.c @@ -187,11 +187,16 @@ static void xhci_add_devices(const struct device *dev) static void xhci_fill_ssdt(const struct device *dev) { int gpe; + const char *scope = acpi_device_scope(dev); + const char *name = acpi_device_name(dev); + + if (!scope || !name) + return; printk(BIOS_DEBUG, "xHCI SSDT generation\n"); - acpigen_write_scope(acpi_device_scope(dev)); - acpigen_write_device(acpi_device_name(dev)); + acpigen_write_scope(scope); + acpigen_write_device(name); acpigen_write_ADR_pci_device(dev); acpigen_write_name_string("_DDN", "xHC - Extensible Host Controller"); |