CVE-2024-35936 Information

May 20, 2024 cve

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

Reference

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

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