From 7ac1e464c4d473b517bb784f30d40da1f842482e Mon Sep 17 00:00:00 2001 From: Qu Wenruo Date: Tue, 26 Feb 2019 16:33:56 +0800 Subject: [PATCH] btrfs: Don't panic when we can't find a root key When we failed to find a root key in btrfs_update_root(), we just panic. That's definitely not cool, fix it by outputting an unique error message, aborting current transaction and return -EUCLEAN. This should not normally happen as the root has been used by the callers in some way. Reviewed-by: Filipe Manana Reviewed-by: Johannes Thumshirn Signed-off-by: Qu Wenruo Reviewed-by: David Sterba Signed-off-by: David Sterba --- fs/btrfs/root-tree.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c index 893d12fbfda0..1b9a5d0de139 100644 --- a/fs/btrfs/root-tree.c +++ b/fs/btrfs/root-tree.c @@ -137,11 +137,14 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root goto out; } - if (ret != 0) { - btrfs_print_leaf(path->nodes[0]); - btrfs_crit(fs_info, "unable to update root key %llu %u %llu", - key->objectid, key->type, key->offset); - BUG_ON(1); + if (ret > 0) { + btrfs_crit(fs_info, + "unable to find root key (%llu %u %llu) in tree %llu", + key->objectid, key->type, key->offset, + root->root_key.objectid); + ret = -EUCLEAN; + btrfs_abort_transaction(trans, ret); + goto out; } l = path->nodes[0]; -- 2.11.0