On Wed, 12 May 2021 06:43:23 +0200, Chanho Park wrote: > > From: eunwoo kim <ew.kim@xxxxxxxxxxx> > > Since snd_pcm_ioctl_sw_params_compat has no runtime variable check, > if application call the ioctl after close, it can make kernel crash. > So, snd_pcm_ioctl_sw_params_compat needs to check the runtime variable > at the beginning of the function. In principle, you cannot call ioctl for an already closed file. Or do you mean other code path? Takashi
