CVE-2021-47504 Information

Description

In the Linux kernel the following vulnerability has been resolved:

io_uring: ensure task_work gets run as part of cancelations

If we successfully cancel a work item but that work item needs to be processed through task_work then we can be sleeping uninterruptibly in io_uring_cancel_generic() and never process it. Hence we don’t make forward progress and we end up with an uninterruptible sleep warning.

While in there correct a comment that should be IFF not IIF.

Reference

https://git.kernel.org/stable/c/8e12976c0c19ebc14b60046b1348c516a74c25a2 https://git.kernel.org/stable/c/78a780602075d8b00c98070fa26e389b3b3efa72