Vulnerability CVE-2024-44938
Published: 2024-08-26

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

jfs: Fix shift-out-of-bounds in dbDiscardAG

When searching for the next smaller log2 block, BLKSTOL2() returned 0,
causing shift exponent -1 to be negative.

This patch fixes the issue by exiting the loop directly when negative
shift is found.

 References:
https://git.kernel.org/stable/c/f650148b43949ca9e37e820804bb6026fff404f3
https://git.kernel.org/stable/c/234e6ea0855cdb5673d54ecaf7dc5c78f3e84630
https://git.kernel.org/stable/c/7063b80268e2593e58bee8a8d709c2f3ff93e2f2
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