| Message ID | 20201202172004.GB1057740@rowland.harvard.edu |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] media: gspca: Fix memory leak in probe | expand |
Index: usb-devel/drivers/media/usb/gspca/gspca.c =================================================================== --- usb-devel.orig/drivers/media/usb/gspca/gspca.c +++ usb-devel/drivers/media/usb/gspca/gspca.c @@ -1575,6 +1575,7 @@ out: input_unregister_device(gspca_dev->input_dev); #endif v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); + v4l2_device_unregister(&gspca_dev->v4l2_dev); kfree(gspca_dev->usb_buf); kfree(gspca_dev); return ret;
The gspca driver leaks memory when a probe fails. gspca_dev_probe2() calls v4l2_device_register(), which takes a reference to the underlying device node (in this case, a USB interface). But the failure pathway neglects to call v4l2_device_unregister(), the routine responsible for dropping this reference. Consequently the memory for the USB interface and its device never gets released. This patch adds the missing function call. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: syzbot+44e64397bd81d5e84cba@syzkaller.appspotmail.com CC: <stable@vger.kernel.org> --- v2: Replace v4l2_device_disconnect() call with v4l2_device_unregister(). [as1949b] drivers/media/usb/gspca/gspca.c | 1 + 1 file changed, 1 insertion(+)