From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 26CB4346A0E; Fri, 21 Nov 2025 13:32:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763731979; cv=none; b=tio5Whfnpb0jSA4KUJBtmRE74OBtDwVV/V6LPhU++F67gIlEjApV1DQuvUFs0/Z++iX4iZMm9buECd31FXYLSjaSRD4SCA+Yei2S6J2R0bC3Yvuk1UNpLe8EHm6+rfCJeSPg/qKmIvF6Q+vhkg6P+H2YV6HmGUK360vKO5aPvAc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763731979; c=relaxed/simple; bh=IyH6dU674VyWLsyhZQrB+xsO1vX2+HxerrF1dwXU6OQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gr6xVM/QM5kuco6j9i9J473EHCa1V7A24EVqA3C6XYSHFhVKOBzWP3YoYMYxhA/DI4xhgT1AdfQExTBD2decA1khqEOT8Yd5G8fwl/AWoedbotyxy11O+ATJao04JeEyyYM1HzWd7jSS2EIiy4ZuG2+E+XBs8vNf3DAwoVHpCpY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LsOR+yIM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="LsOR+yIM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 95289C4CEF1; Fri, 21 Nov 2025 13:32:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1763731979; bh=IyH6dU674VyWLsyhZQrB+xsO1vX2+HxerrF1dwXU6OQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LsOR+yIMdiRy4iNLK+tRah4SKf9znZD94pILJ9l0n77dTH50N29kXRxcLAoTINox2 1A4OnyPtBPgKUXtqqJ8rHDcTmtfeM5wr0AWGY71KTI/54F6H9PAWOP+IudVEYMzD6r Ct6TyCK/PzRmuynI6ql9n41P3HJ2G3N++W5x6eK0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qu Wenruo , Zilin Guan , David Sterba Subject: [PATCH 6.12 147/185] btrfs: release root after error in data_reloc_print_warning_inode() Date: Fri, 21 Nov 2025 14:12:54 +0100 Message-ID: <20251121130149.183505494@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251121130143.857798067@linuxfoundation.org> References: <20251121130143.857798067@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zilin Guan commit c367af440e03eba7beb0c9f3fe540f9bcb69134a upstream. data_reloc_print_warning_inode() calls btrfs_get_fs_root() to obtain local_root, but fails to release its reference when paths_from_inode() returns an error. This causes a potential memory leak. Add a missing btrfs_put_root() call in the error path to properly decrease the reference count of local_root. Fixes: b9a9a85059cde ("btrfs: output affected files when relocation fails") CC: stable@vger.kernel.org # 6.6+ Reviewed-by: Qu Wenruo Signed-off-by: Zilin Guan Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/inode.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -174,8 +174,10 @@ static int data_reloc_print_warning_inod return ret; } ret = paths_from_inode(inum, ipath); - if (ret < 0) + if (ret < 0) { + btrfs_put_root(local_root); goto err; + } /* * We deliberately ignore the bit ipath might have been too small to