From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A2CCC33C9E for ; Fri, 17 Jan 2020 21:26:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3C7A52072E for ; Fri, 17 Jan 2020 21:26:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=toxicpanda-com.20150623.gappssmtp.com header.i=@toxicpanda-com.20150623.gappssmtp.com header.b="ibhh4p4Q" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728797AbgAQV0i (ORCPT ); Fri, 17 Jan 2020 16:26:38 -0500 Received: from mail-qt1-f193.google.com ([209.85.160.193]:36990 "EHLO mail-qt1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726587AbgAQV0h (ORCPT ); Fri, 17 Jan 2020 16:26:37 -0500 Received: by mail-qt1-f193.google.com with SMTP id w47so22896698qtk.4 for ; Fri, 17 Jan 2020 13:26:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=kvs2zgeWGFIOEWBcae13gISN2NDUfogrB0w8hZ982w4=; b=ibhh4p4QUkYpGPioB5lapUM+YRYdlZ+wC7O3Jvo7W2QQrBU47HjujzTmFf18cTxqDi Hh30WGxDsk0zw5C9h+veqt0np8nhFmHb6cTqdXjqVBPeVpM476UtVKSEgOfxqwEmElZR JaOopIdBiyIFf7ONqpnKLyeux2nKaaC9rkFJ9sr8l6khLX0+/D36EWHZg0Z6TYz2XXBW DZe9if4VerG2Seu8lMK3OMretWoorvdps4YvYgHs8nR7GFl9JzeF7gb9u/8dgtsaEpkg 86MMtjUStD2E+H+M6l/NdBT4EiPzmsWZpdFWwjOCvSd2RWIL32GuqE2VxcPSwESlEveo Rlmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=kvs2zgeWGFIOEWBcae13gISN2NDUfogrB0w8hZ982w4=; b=Bt5VrnRzFvqVyuX3e15pTe0E4plNncFVLGjJ89LOd1ID4goRDk+FRVZaH4gqWZak9Z JXCzzisq+/ycYbED/AJMDEp70ZKLpRklHMkSnSdA++N8Ca4/xnLp/PgZ9a/Wag45HwNT ZvBQTfhC9hBNYjt8qW9wYomFTU74X6Sq+TmuIh4cwoQl5CR73piha3bKptAHTFT4AtQ+ ZQBGK1dpXu3/IORHsn2asFTH2uWVgJfDts0cRMABPh7C9TL4I/lvN9XczxVFKnpySXQ6 uunT+8r3yE4lo5ycSCvNLYFWbkw5qpqhYTkNJoMSTTW+6XgT0MyKazwy5vObDnWk2qZm yl9A== X-Gm-Message-State: APjAAAVU6Py2Tiw9LIPJdCP+E9GupoeS44AC349rmGP9xMrAgVMEs9cf rFhRf73H4i5Am9qvnc0NIAzBXz1pp6jj7w== X-Google-Smtp-Source: APXvYqw1zACsCizomU+KbQg/7D790ZOzWMOB9esb9/HD86SfNL0oGWnMIarrOshjnkH370Aqj8C3sA== X-Received: by 2002:ac8:7501:: with SMTP id u1mr9616726qtq.149.1579296396653; Fri, 17 Jan 2020 13:26:36 -0800 (PST) Received: from localhost ([107.15.81.208]) by smtp.gmail.com with ESMTPSA id l17sm12490857qkk.22.2020.01.17.13.26.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jan 2020 13:26:36 -0800 (PST) From: Josef Bacik To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH 17/43] btrfs: hold a ref on the root in btrfs_search_path_in_tree Date: Fri, 17 Jan 2020 16:25:36 -0500 Message-Id: <20200117212602.6737-18-josef@toxicpanda.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200117212602.6737-1-josef@toxicpanda.com> References: <20200117212602.6737-1-josef@toxicpanda.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org We look up an arbitrary fs root, we need to hold a ref on it while we're doing our search. Signed-off-by: Josef Bacik --- fs/btrfs/ioctl.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 62dd06b65686..c721b4fce1c0 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2328,6 +2328,12 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info, root = btrfs_get_fs_root(info, &key, true); if (IS_ERR(root)) { ret = PTR_ERR(root); + root = NULL; + goto out; + } + if (!btrfs_grab_fs_root(root)) { + ret = -ENOENT; + root = NULL; goto out; } @@ -2378,6 +2384,8 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info, name[total_len] = '\0'; ret = 0; out: + if (root) + btrfs_put_fs_root(root); btrfs_free_path(path); return ret; } -- 2.24.1