From: Pavel Skripkin paskripkin@gmail.com
stable inclusion from stable-5.10.61 commit ff2fc9e4aaa6551f5b4a4ba0a3a7ea89771694ac bugzilla: 177029 https://gitee.com/openeuler/kernel/issues/I4EAXD
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 9c39be40c0155c43343f53e3a439290c0fec5542 ]
syzbot reported memory leak in zr364xx_probe()[1]. The problem was in invalid error handling order. All error conditions rigth after v4l2_ctrl_handler_init() must call v4l2_ctrl_handler_free().
Reported-by: syzbot+efe9aefc31ae1e6f7675@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin paskripkin@gmail.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/media/usb/zr364xx/zr364xx.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/media/usb/zr364xx/zr364xx.c b/drivers/media/usb/zr364xx/zr364xx.c index 8636acf2dad0..08b86b22e5e8 100644 --- a/drivers/media/usb/zr364xx/zr364xx.c +++ b/drivers/media/usb/zr364xx/zr364xx.c @@ -1433,7 +1433,7 @@ static int zr364xx_probe(struct usb_interface *intf, if (hdl->error) { err = hdl->error; dev_err(&udev->dev, "couldn't register control\n"); - goto unregister; + goto free_hdlr_and_unreg_dev; } /* save the init method used by this camera */ cam->method = id->driver_info; @@ -1506,7 +1506,7 @@ static int zr364xx_probe(struct usb_interface *intf, if (!cam->read_endpoint) { err = -ENOMEM; dev_err(&intf->dev, "Could not find bulk-in endpoint\n"); - goto unregister; + goto free_hdlr_and_unreg_dev; }
/* v4l */ @@ -1518,7 +1518,7 @@ static int zr364xx_probe(struct usb_interface *intf, /* load zr364xx board specific */ err = zr364xx_board_init(cam); if (err) - goto unregister; + goto free_hdlr_and_unreg_dev; err = v4l2_ctrl_handler_setup(hdl); if (err) goto board_uninit; @@ -1536,7 +1536,7 @@ static int zr364xx_probe(struct usb_interface *intf, err = video_register_device(&cam->vdev, VFL_TYPE_VIDEO, -1); if (err) { dev_err(&udev->dev, "video_register_device failed\n"); - goto free_handler; + goto board_uninit; } cam->v4l2_dev.release = zr364xx_release;
@@ -1544,11 +1544,10 @@ static int zr364xx_probe(struct usb_interface *intf, video_device_node_name(&cam->vdev)); return 0;
-free_handler: - v4l2_ctrl_handler_free(hdl); board_uninit: zr364xx_board_uninit(cam); -unregister: +free_hdlr_and_unreg_dev: + v4l2_ctrl_handler_free(hdl); v4l2_device_unregister(&cam->v4l2_dev); free_cam: kfree(cam);