diff options
| author | David Sterba <dsterba@suse.com> | 2025-09-15 08:37:47 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2025-09-18 05:47:34 +0200 |
| commit | ed4e6b5d644c4dd2bc2872ffec036b7da0ec2e27 (patch) | |
| tree | eddccaad9e3c80aae4b7e175895b0250c9171df8 | |
| parent | 96fa515e70f3e4b98685ef8cac9d737fc62f10e1 (diff) | |
btrfs: ref-verify: handle damaged extent root tree
Syzbot hits a problem with enabled ref-verify, ignorebadroots and a
fuzzed/damaged extent tree. There's no fallback option like in other
places that can deal with it so disable the whole ref-verify as it is
just a debugging feature.
Reported-by: syzbot+9c3e0cdfbfe351b0bc0e@syzkaller.appspotmail.com
Link: https://lore.kernel.org/all/0000000000001b6052062139be1c@google.com/
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
| -rw-r--r-- | fs/btrfs/ref-verify.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c index 3871c3a6c743..9f1858b42c0e 100644 --- a/fs/btrfs/ref-verify.c +++ b/fs/btrfs/ref-verify.c @@ -980,11 +980,18 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info) if (!btrfs_test_opt(fs_info, REF_VERIFY)) return 0; + extent_root = btrfs_extent_root(fs_info, 0); + /* If the extent tree is damaged we cannot ignore it (IGNOREBADROOTS). */ + if (IS_ERR(extent_root)) { + btrfs_warn(fs_info, "ref-verify: extent tree not available, disabling"); + btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY); + return 0; + } + path = btrfs_alloc_path(); if (!path) return -ENOMEM; - extent_root = btrfs_extent_root(fs_info, 0); eb = btrfs_read_lock_root_node(extent_root); level = btrfs_header_level(eb); path->nodes[level] = eb; |