btrfs: handle errors from btrfs_dec_ref() properly
commit 5eb178f373b4f16f3b42d55ff88fc94dd95b93b1 upstream. In walk_up_proc() we BUG_ON(ret) from btrfs_dec_ref(). This is incorrect, we have proper error handling here, return the error. Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> Signed-off-by: Jianqi Ren <jianqi.ren.cn@windriver.com> Signed-off-by: He Zhe <zhe.he@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -5575,7 +5575,10 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
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ret = btrfs_dec_ref(trans, root, eb, 1);
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else
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ret = btrfs_dec_ref(trans, root, eb, 0);
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BUG_ON(ret); /* -ENOMEM */
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if (ret) {
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btrfs_abort_transaction(trans, ret);
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return ret;
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}
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if (is_fstree(root->root_key.objectid)) {
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ret = btrfs_qgroup_trace_leaf_items(trans, eb);
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if (ret) {
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