Re: [PATCH] ALSA: mixer: oss: Fix racy access to slots

On 20. 10. 21 18:48, Takashi Iwai wrote:

The OSS mixer can reassign the mapping slots dynamically via proc file. Although the addition and deletion of those slots are protected by mixer->reg_mutex, the access to slots aren't, hence this may cause UAF when the slots in use are deleted concurrently.

This patch applies the mixer->reg_mutex in all appropriate code paths (i.e. the ioctl functions) that may access slots.

Reviewed-by: Jaroslav Kysela perex@perex.cz

Thanks, Jaroslav