Pavel Skripkin c4fb41bdf4 video: fbdev: udlfb: properly check endpoint type ... [ Upstream commit aaf7dbe07385e0b8deb7237eca2a79926bbc7091 ] syzbot reported warning in usb_submit_urb, which is caused by wrong endpoint type. This driver uses out bulk endpoint for communication, so let's check if this endpoint is present and bail out early if not. Fail log: usb 1-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 0 PID: 4822 at drivers/usb/core/urb.c:493 usb_submit_urb+0xd27/0x1540 drivers/usb/core/urb.c:493 Modules linked in: CPU: 0 PID: 4822 Comm: kworker/0:3 Tainted: G W 5.13.0-syzkaller #0 ... Workqueue: usb_hub_wq hub_event RIP: 0010:usb_submit_urb+0xd27/0x1540 drivers/usb/core/urb.c:493 ... Call Trace: dlfb_submit_urb+0x89/0x160 drivers/video/fbdev/udlfb.c:1969 dlfb_set_video_mode+0x21f0/0x2950 drivers/video/fbdev/udlfb.c:315 dlfb_ops_set_par+0x2a3/0x840 drivers/video/fbdev/udlfb.c:1110 dlfb_usb_probe.cold+0x113e/0x1f4a drivers/video/fbdev/udlfb.c:1732 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 Fixes: 88e58b1a42 ("Staging: add udlfb driver") Reported-and-tested-by: syzbot+53ce4a4246d0fe0fee34@syzkaller.appspotmail.com Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-05-09 09:05:00 +02:00
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fbdev	video: fbdev: udlfb: properly check endpoint type	2022-05-09 09:05:00 +02:00
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display_timing.c
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