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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)
commita0d21bb3279476c777434c40d969ea88ca64f9aa
treea710bb3a32acc98345c92374c5aa9bb4dcfd747ctree | snapshot
parentf917c04fac45b70ff38633675f86ab4b51782205commit | 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 | blame | history
Linux 6.x block layer and io_uring tree(s)