From: Hans Verkuil hverkuil-cisco@xs4all.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@syzkaller.appspotmail.com Reported-and-tested-by: syzbot+99706d6390be1ac542a2@syzkaller.appspotmail.com Reported-and-tested-by: syzbot+64437af5c781a7f0e08e@syzkaller.appspotmail.com
Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.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 @@ -1461,7 +1461,7 @@ 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;