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| author | Josef Bacik <jbacik@fusionio.com> | 2013-04-23 11:30:14 -0400 |
|---|---|---|
| committer | Josef Bacik <jbacik@fusionio.com> | 2013-05-06 15:55:05 -0400 |
| commit | 1c24c3ce6a8022ab225f44160bfddc92a5a6e435 (patch) | |
| tree | 594033c6bf744a5d8baf0c7c9ad51fdde2b8d5ed /fs | |
| parent | 5ec8dca7617b77afb0e3c7e6271089172b498546 (diff) | |
| download | linux-1c24c3ce6a8022ab225f44160bfddc92a5a6e435.tar.gz | |
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 <jbacik@fusionio.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/disk-io.c | 6 |
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; + } btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), eb, found_level); |