Commit a34ae6c0 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: wavefront: Proper check of get_user() error 



The antient ISA wavefront driver reads its sample patch data (uploaded
over an ioctl) via __get_user() with no good reason; likely just for
some performance optimizations in the past.  Let's change this to the
standard get_user() and the error check for handling the fault case
properly.

Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220510103626.16635-1-tiwai@suse.de


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 1efcdd9c

sound/isa/wavefront/wavefront_synth.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -1094,7 +1094,8 @@ wavefront_send_sample (snd_wavefront_t *dev, 




			if (dataptr < data_end) {

			if (dataptr < data_end) {

		

		

				__get_user (sample_short, dataptr);

				if (get_user(sample_short, dataptr))

					return -EFAULT;

				dataptr += skip;

				dataptr += skip;

		

		

				if (data_is_unsigned) { /* GUS ? */

				if (data_is_unsigned) { /* GUS ? */