Re: [PATCH 4.19.y] ALSA: pcm: disallow linking stream to itself

On Mon, Jun 15, 2020 at 05:41:19PM +0200, Takashi Iwai wrote:

From: Michał Mirosław mirq-linux@rere.qmqm.pl

commit 951e2736f4b11b58dc44d41964fa17c3527d882a upstream.

Prevent SNDRV_PCM_IOCTL_LINK linking stream to itself - the code can't handle it. Fixed commit is not where bug was introduced, but changes the context significantly.

Cc: stable@vger.kernel.org Fixes: 0888c321de70 ("pcm_native: switch to fdget()/fdput()") Signed-off-by: Michał Mirosław mirq-linux@rere.qmqm.pl Link: https://lore.kernel.org/r/89c4a2487609a0ed6af3ecf01cc972bdc59a7a2d.159163495... Signed-off-by: Takashi Iwai tiwai@suse.de

---

Backported to 4.19.y. It can be used for older branches, too.

Thanks, that worked.

greg k-h