We are accessing "desc->ops" in sof_pci_probe without checking "desc"
pointer. This results in NULL pointer exception if pci_id->driver_data
i.e desc pointer isn't defined in sof device probe:
BUG: kernel NULL pointer dereference, address:
0000000000000060
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
RIP: 0010:sof_pci_probe+0x1e/0x17f [snd_sof_pci]
Code: Unable to access opcode bytes at RIP 0xffffffffc043dff4.
RSP: 0018:
ffffac4b03b9b8d8 EFLAGS:
00010246
Add NULL pointer check for sof_dev_desc pointer to avoid such exception.
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220426183357.102155-1-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
dev_dbg(&pci->dev, "PCI DSP detected");
+ if (!desc) {
+ dev_err(dev, "error: no matching PCI descriptor\n");
+ return -ENODEV;
+ }
+
if (!desc->ops) {
dev_err(dev, "error: no matching PCI descriptor ops\n");
return -ENODEV;