Vulnerability CVE-2024-35936
Published: 2024-05-19

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

btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks()

The unhandled case in btrfs_relocate_sys_chunks() loop is a corruption,
as it could be caused only by two impossible conditions:

- at first the search key is set up to look for a chunk tree item, with
offset -1, this is an inexact search and the key->offset will contain
the correct offset upon a successful search, a valid chunk tree item
cannot have an offset -1

- after first successful search, the found_key corresponds to a chunk
item, the offset is decremented by 1 before the next loop, it's
impossible to find a chunk item there due to alignment and size
constraints

 References:
https://git.kernel.org/stable/c/bebd9e0ff90034875c5dfe4bd514fd7055fc7a89
https://git.kernel.org/stable/c/576164bd01bd795f8b09fb194b493103506b33c9
https://git.kernel.org/stable/c/87299cdaae757f3f41212146cfb5b3af416b8385
https://git.kernel.org/stable/c/d1ffa4ae2d591fdd40471074e79954ec45f147f7
https://git.kernel.org/stable/c/36c2a2863bc3896243eb724dc3fd4cf9aea633f2
https://git.kernel.org/stable/c/0d23b34c68c46cd225b55868bc8a269e3134816d
https://git.kernel.org/stable/c/1f9212cdbd005bc55f2b7422e7b560d9c02bd1da
https://git.kernel.org/stable/c/7411055db5ce64f836aaffd422396af0075fdc99
Copyright 2026, cxsecurity.com

 

Back to Top