CVE-2022-49151

Summary

In the Linux kernel, the following vulnerability has been resolved:

can: mcba_usb: properly check endpoint type

Syzbot reported warning in usb_submit_urb() which is caused by wrong endpoint type. We should check that in endpoint is actually present to prevent this warning.

Found pipes are now saved to struct mcba_priv and code uses them directly instead of making pipes in place.

Fail log:

| usb 5-1: BOGUS urb xfer, pipe 3 != type 1 | WARNING: CPU: 1 PID: 49 at drivers/usb/core/urb.c:502 usb_submit_urb+0xed2/0x18a0 drivers/usb/core/urb.c:502 | Modules linked in: | CPU: 1 PID: 49 Comm: kworker/1:2 Not tainted 5.17.0-rc6-syzkaller-00184-g38f80f42147f #0 | Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 | Workqueue: usb_hub_wq hub_event | RIP: 0010:usb_submit_urb+0xed2/0x18a0 drivers/usb/core/urb.c:502 | … | Call Trace: | <TASK> | mcba_usb_start drivers/net/can/usb/mcba_usb.c:662 [inline] | mcba_usb_probe+0x8a3/0xc50 drivers/net/can/usb/mcba_usb.c:858 | usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396 | call_driver_probe drivers/base/dd.c:517 [inline]

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/5598442edc29e8f6f2380e4b471dc1a3fcd80508
• https://git.kernel.org/stable/c/b48d1bb3f1ca337ad653022aefb5a40a47dfe5cd
• https://git.kernel.org/stable/c/cbd110b8dd7ad763bf413f71c0484116ae9302d4
• https://git.kernel.org/stable/c/ef0acc514123140157b19a9ff2e2de5d91d612bc
• https://git.kernel.org/stable/c/fa9c1f14002dc0d5293e16a2007bd89b6e79207b
• https://git.kernel.org/stable/c/88272b4a37913bdf6f339162a7920bd8e9b49de2
• https://git.kernel.org/stable/c/f2ec3cd0f34f8c3f94bc21fbba14868301c9c49d
• https://git.kernel.org/stable/c/136bed0bfd3bc9c95c88aafff2d22ecb3a919f23

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