Btrfs-progs already has comprehensive type checker, to ensure there is only 0 (SINGLE profile) or 1 (DUP/RAID0/1/5/6/10) bit set for chunk profile bits.
Do the same work for kernel. Reported-by: Yoon Jungyeon <[email protected]> Link: https://bugzilla.kernel.org/show_bug.cgi?id=202765 Signed-off-by: Qu Wenruo <[email protected]> --- fs/btrfs/tree-checker.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index 5ccb4be583ea..c08609627720 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -551,6 +551,13 @@ int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info, return -EUCLEAN; } + if (!is_power_of_2(type & BTRFS_BLOCK_GROUP_PROFILE_MASK) && + (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) != 0) { + chunk_err(fs_info, leaf, chunk, logical, + "invalid chunk profile flag: 0x%llx, expect 0 or 1 bit set", + type & BTRFS_BLOCK_GROUP_PROFILE_MASK); + return -EUCLEAN; + } if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) { chunk_err(fs_info, leaf, chunk, logical, "missing chunk type flag: 0x%llx", type); -- 2.21.0
