path: root/fs/btrfs/disk-io.c
diff options
authorJosef Bacik <>2013-04-23 11:30:14 -0400
committerJosef Bacik <>2013-05-06 15:55:05 -0400
commit1c24c3ce6a8022ab225f44160bfddc92a5a6e435 (patch)
tree594033c6bf744a5d8baf0c7c9ad51fdde2b8d5ed /fs/btrfs/disk-io.c
parent5ec8dca7617b77afb0e3c7e6271089172b498546 (diff)
Btrfs: add tree block level sanity check
With a users corrupted fs I was getting weird behavior and panics and it turns out it was because one of his tree blocks had a bogus header level. So add this to the sanity checks in the endio handler for tree blocks. Thanks, Signed-off-by: Josef Bacik <>
Diffstat (limited to 'fs/btrfs/disk-io.c')
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index bb6cdbda4f56..c7d8fb0dbff6 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -613,6 +613,12 @@ static int btree_readpage_end_io_hook(struct page *page, u64 start, u64 end,
goto err;
found_level = btrfs_header_level(eb);
+ if (found_level >= BTRFS_MAX_LEVEL) {
+ btrfs_info(root->fs_info, "bad tree block level %d\n",
+ (int)btrfs_header_level(eb));
+ ret = -EIO;
+ goto err;
+ }
eb, found_level);