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ALSA: gus: fix null pointer dereference on pointer block
authorChengfeng Ye <cyeaa@connect.ust.hk>
Sun, 24 Oct 2021 10:46:11 +0000 (03:46 -0700)
committerTakashi Iwai <tiwai@suse.de>
Tue, 26 Oct 2021 06:02:16 +0000 (08:02 +0200)
commit5f408ee8b73b9dfd5fc5bd1ace87fcde9d5c1284
treea710bb3a32acc98345c92374c5aa9bb4dcfd747ctree | snapshot
parentff23f251c1a74b8588635be293afdbb575de0fc3commit | diff
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.

Signed-off-by: Chengfeng Ye <cyeaa@connect.ust.hk>
Link: https://lore.kernel.org/r/20211024104611.9919-1-cyeaa@connect.ust.hk
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/isa/gus/gus_dma.c diff | blob | history
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