linux-kernel - [PATCH 4.9 017/128] media: vivid: use vfree() instead of kfree() for dev->bitmap

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Message-Id: <20190530030437.846627438@linuxfoundation.org>
Date:   Wed, 29 May 2019 20:05:49 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alexander Potapenko <glider@...gle.com>,
        Syzbot <syzbot+6c0effb5877f6b0344e2@...kaller.appspotmail.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Subject: [PATCH 4.9 017/128] media: vivid: use vfree() instead of kfree() for dev->bitmap_cap

From: Alexander Potapenko <glider@...gle.com>

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@...gle.com>
Reported-by: Syzbot <syzbot+6c0effb5877f6b0344e2@...kaller.appspotmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/platform/vivid/vivid-vid-cap.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/media/platform/vivid/vivid-vid-cap.c
+++ b/drivers/media/platform/vivid/vivid-vid-cap.c
@@ -984,7 +984,7 @@ int vivid_vid_cap_s_selection(struct fil
 		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;