In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: Intel: hda: Fix NULL pointer dereference If there's a mismatch between the DAI links in the machine driver and the topology, it is possible that the playback/capture widget is not set, especially in the case of loopback capture for echo reference where we use the dummy DAI link. Return the error when the widget is not set to avoid a null pointer dereference like below when the topology is broken. RIP: 0010:hda_dai_get_ops.isra.0+0x14/0xa0 [snd_sof_intel_hda_common]
https://git.kernel.org/stable/c/7750d78b4014902bc0ac03d4bb30faa076a913ab
https://git.kernel.org/stable/c/42068f7dd42b559c4eeae645e1455ff36518866a
https://git.kernel.org/stable/c/16c589567a956d46a7c1363af3f64de3d420af20
https://git.kernel.org/stable/c/10411f1f2c76be67103b1f95822ff629aa25e2aa