btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks()

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[ Upstream commit 7411055db5 ]

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

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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David Sterba 2024-01-23 23:42:29 +01:00 • committed by Greg Kroah-Hartman

parent 5d7a8585fb

commit 0d23b34c68

1 changed files with 11 additions and 1 deletions

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fs/btrfs/volumes.c

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