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Date: Mon, 3 Feb 2020 16:19:30 +0000
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Hans Verkuil <hverkuil-cisco@...all.nl>,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
syzbot+32310fc2aea76898d074@...kaller.appspotmail.com,
syzbot+99706d6390be1ac542a2@...kaller.appspotmail.com,
syzbot+64437af5c781a7f0e08e@...kaller.appspotmail.com
Subject: [PATCH 4.19 18/70] media: gspca: zero usb_buf
From: Hans Verkuil <hverkuil-cisco@...all.nl>
commit de89d0864f66c2a1b75becfdd6bf3793c07ce870 upstream.
Allocate gspca_dev->usb_buf with kzalloc instead of kmalloc to
ensure it is property zeroed. This fixes various syzbot errors
about uninitialized data.
Syzbot links:
https://syzkaller.appspot.com/bug?extid=32310fc2aea76898d074
https://syzkaller.appspot.com/bug?extid=99706d6390be1ac542a2
https://syzkaller.appspot.com/bug?extid=64437af5c781a7f0e08e
Reported-and-tested-by: syzbot+32310fc2aea76898d074@...kaller.appspotmail.com
Reported-and-tested-by: syzbot+99706d6390be1ac542a2@...kaller.appspotmail.com
Reported-and-tested-by: syzbot+64437af5c781a7f0e08e@...kaller.appspotmail.com
Signed-off-by: Hans Verkuil <hverkuil-cisco@...all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/media/usb/gspca/gspca.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/media/usb/gspca/gspca.c
+++ b/drivers/media/usb/gspca/gspca.c
@@ -1473,7 +1473,7 @@ int gspca_dev_probe2(struct usb_interfac
pr_err("couldn't kzalloc gspca struct\n");
return -ENOMEM;
}
- gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
+ gspca_dev->usb_buf = kzalloc(USB_BUF_SZ, GFP_KERNEL);
if (!gspca_dev->usb_buf) {
pr_err("out of memory\n");
ret = -ENOMEM;
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