CVE-2022-48836

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> Input: aiptek - properly check endpoint type<br /> <br /> Syzbot reported warning in usb_submit_urb() which is caused by wrong<br /> endpoint type. There was a check for the number of endpoints, but not<br /> for the type of endpoint.<br /> <br /> Fix it by replacing old desc.bNumEndpoints check with<br /> usb_find_common_endpoints() helper for finding endpoints<br /> <br /> Fail log:<br /> <br /> usb 5-1: BOGUS urb xfer, pipe 1 != type 3<br /> WARNING: CPU: 2 PID: 48 at drivers/usb/core/urb.c:502 usb_submit_urb+0xed2/0x18a0 drivers/usb/core/urb.c:502<br /> Modules linked in:<br /> CPU: 2 PID: 48 Comm: kworker/2:2 Not tainted 5.17.0-rc6-syzkaller-00226-g07ebd38a0da2 #0<br /> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014<br /> Workqueue: usb_hub_wq hub_event<br /> ...<br /> Call Trace:<br /> <br /> aiptek_open+0xd5/0x130 drivers/input/tablet/aiptek.c:830<br /> input_open_device+0x1bb/0x320 drivers/input/input.c:629<br /> kbd_connect+0xfe/0x160 drivers/tty/vt/keyboard.c:1593