CVE-2021-47207

In the Linux kernel, the following vulnerability has been resolved: ALSA: gus: fix null pointer dereference on pointer block The pointer block return from snd_gf1_dma_next_block could be null, so there is a potential null pointer dereference issue. Fix this by adding a null check before dereference.

• linux linux kernel (< 4.4.293) • linux linux kernel (>= 4.5 < 4.9.291) • linux linux kernel (>= 4.10 < 4.14.256) • linux linux kernel (>= 4.15 < 4.19.218) • linux linux kernel (>= 4.20 < 5.4.162) • linux linux kernel (>= 5.5 < 5.10.82) • linux linux kernel (>= 5.11 < 5.15.5)