On Tue, Dec 05, 2017 at 09:19:32AM -0800, Nick Desaulniers wrote: > + stable > > On Tue, Dec 5, 2017 at 9:16 AM, Nick Desaulniers > <ndesaulniers@xxxxxxxxxx> wrote: > > From: Robb Glasser <rglasser@xxxxxxxxxx> > > > > When the device descriptor is closed, the `substream->runtime` pointer > > is freed. But another thread may be in the ioctl handler, case > > SNDRV_CTL_IOCTL_PCM_INFO. This case calls snd_pcm_info_user() which > > calls snd_pcm_info() which accesses the now freed `substream->runtime`. > > > > Signed-off-by: Robb Glasser <rglasser@xxxxxxxxxx> > > Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> > > --- > > sound/core/pcm.c | 2 ++ > > 1 file changed, 2 insertions(+) <formletter> This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly. </formletter>