On Fri, 17 Aug 2018 05:12:27 +0200, Hsin-Yu Chao wrote: > > When seccomp policy is applied to filter ioctl syscall with > SNDRV_CTL_IOCTL_TLV_COMMAND, SNDRV_CTL_IOCTL_TLV_READ and > SNDRV_CTL_IOCTL_TLV_WRITE in whiltelist, alsa-lib still breaks > in at snd_ctl_hw_elem_tlv(). > > The problem behind is because ioctl() takes unsigned long cmd > argument, and the signed bit of local int variable could cause > 0xff bytes appended after casted to unsigned long. > In kernel, seccomp data struct takes 64 bits argument to check > against seccomp rules, these unexpected 0xff bytes could make > the rule check fail. > > Fix the problem by passing unsigned int to ioctl. > > Signed-off-by: Hsin-Yu Chao <hychao@xxxxxxxxxxxx> Thanks, applied now. Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
