Subject: btrfs: tree-checker: Enhance chunk checker to validate chunk profile

From: Qu Wenruo <[email-masked]>
Date: Wed, 13 Mar 2019 12:17:50 +0800

commit 80e46cf22ba0bcb57b39c7c3b52961ab3a0fd5f2 upstream.

Btrfs-progs already have a 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-masked]>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=202765
Reviewed-by: Nikolay Borisov <[email-masked]>
Reviewed-by: Johannes Thumshirn <[email-masked]>
Signed-off-by: Qu Wenruo <[email-masked]>
Reviewed-by: David Sterba <[email-masked]>
Signed-off-by: David Sterba <[email-masked]>
Signed-off-by: Ben Hutchings <[email-masked]>
---
 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 a0222e6a11c5..ab1553781e9c 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -556,6 +556,13 @@ 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, have 0x%llx one bit must be set in 0x%llx",