CVE-2021-47039 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ataflop: potential out of bounds in do_format()

The function uses ype\ as an array index:

q = unit[drive].disk[type]->queue;

Unfortunately the bounds check on ype\ isn’t done until later in the function. Fix this by moving the bounds check to the start.

Reference

https://git.kernel.org/stable/c/07f86aa8f4fe077be1b018cc177eb8c6573e5671 https://git.kernel.org/stable/c/2a3a8bbca28b899806844c00d49ed1b7ccb50957 https://git.kernel.org/stable/c/1ffec389a6431782a8a28805830b6fae9bf00af1