From: Takashi Iwai tiwai@suse.de
commit a34ae6c0660d3b96b0055f68ef74dc9478852245 upstream.
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: Linus 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: Takashi Iwai tiwai@suse.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/isa/wavefront/wavefront_synth.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/sound/isa/wavefront/wavefront_synth.c +++ b/sound/isa/wavefront/wavefront_synth.c @@ -1088,7 +1088,8 @@ wavefront_send_sample (snd_wavefront_t *
if (dataptr < data_end) { - __get_user (sample_short, dataptr); + if (get_user(sample_short, dataptr)) + return -EFAULT; dataptr += skip; if (data_is_unsigned) { /* GUS ? */