media: vivid: use vfree() instead of kfree() for dev->bitmap_cap

commit dad7e270ba712ba1c99cd2d91018af6044447a06 upstream.

syzkaller reported crashes on kfree() called from
vivid_vid_cap_s_selection(). This looks like a simple typo, as
dev->bitmap_cap is allocated with vzalloc() throughout the file.

Fixes: ef834f7836ec0 ("[media] vivid: add the video capture and output
parts")

Signed-off-by: Alexander Potapenko <glider@google.com>
Reported-by: Syzbot <syzbot+6c0effb5877f6b0344e2@syzkaller.appspotmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/platform/vivid/vivid-vid-cap.c b/drivers/media/platform/vivid/vivid-vid-cap.c
index baa7c83..3b09ffc 100644 (file)
--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -992,7 +992,7 @@ int vivid_vid_cap_s_selection(struct file *file, void *fh, struct v4l2_selection
                v4l2_rect_map_inside(&s->r, &dev->fmt_cap_rect);
                if (dev->bitmap_cap && (compose->width != s->r.width ||
                                        compose->height != s->r.height)) {
-                       kfree(dev->bitmap_cap);
+                       vfree(dev->bitmap_cap);
                        dev->bitmap_cap = NULL;
                }
                *compose = s->r;