diff mbox series

sound/isa/wavefront: copy userspace array safely

Message ID 20231102190309.50891-2-pstanner@redhat.com (mailing list archive)
State New, archived
Headers show
Series sound/isa/wavefront: copy userspace array safely | expand

Commit Message

Philipp Stanner Nov. 2, 2023, 7:03 p.m. UTC 
wavefront_fx.c utilizes memdup_user() to copy a userspace array. This
does not check for an overflow.

Use the new wrapper memdup_array_user() to copy the array more safely.

Suggested-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
---
 sound/isa/wavefront/wavefront_fx.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/sound/isa/wavefront/wavefront_fx.c b/sound/isa/wavefront/wavefront_fx.c
index 3c21324b2a0e..0273b7dfaf12 100644
--- a/sound/isa/wavefront/wavefront_fx.c
+++ b/sound/isa/wavefront/wavefront_fx.c
@@ -191,9 +191,9 @@  snd_wavefront_fx_ioctl (struct snd_hwdep *sdev, struct file *file,
 					    "> 512 bytes to FX\n");
 				return -EIO;
 			}
-			page_data = memdup_user((unsigned char __user *)
-						r.data[3],
-						r.data[2] * sizeof(short));
+			page_data = memdup_array_user((unsigned char __user *)
+						      r.data[3],
+						      r.data[2], sizeof(short));
 			if (IS_ERR(page_data))
 				return PTR_ERR(page_data);
 			pd = page_data;