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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49A3FC77B7A for ; Wed, 31 May 2023 13:42:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235827AbjEaNmP (ORCPT ); Wed, 31 May 2023 09:42:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236577AbjEaNlh (ORCPT ); Wed, 31 May 2023 09:41:37 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E3D710E4; Wed, 31 May 2023 06:41:06 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 652C863B00; Wed, 31 May 2023 13:40:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C5E60C4339B; Wed, 31 May 2023 13:40:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1685540449; bh=M73FQpmA3uOSySWRcaeDWBSQvLIHC25woMxh3JVMDuQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=luafmh30sIcgG4a93BFJsV0ouc7o4LfdvFyOjNh2CNiaL3cg1cq7QCS5wYcOBmWoi Pyv5667+yxb9mZ7hNKCeKkVbHIEOr1dPjUtGSMLxXg27EyMhVndkXra4pFr9/VYsyt 3sTUgRzjOzTm5cz2+ZSLuFQiPgkV5IhNbaOHbxGj6ZBQih5DU4Jvdwi0kpOZxPkiPL ISkxUa/U14PScGtonJF/RM5JZcywnq+de3LEzHE1I6heEzAsRLeDIDPMQda11NvXgl 5QooqMNSNOOH+pHYMmRsxMTT4XcPRRk/Ekmlhf1jTgoxSzggiwO6eBt4tNBSBQVDTB MuiD0LRWuEoCw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Johannes Thumshirn , syzbot+d8941552e21eac774778@syzkaller.appspotmail.com, Christoph Hellwig , Anand Jain , David Sterba , Sasha Levin , clm@fb.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org Subject: [PATCH AUTOSEL 6.3 18/37] btrfs: handle memory allocation failure in btrfs_csum_one_bio Date: Wed, 31 May 2023 09:40:00 -0400 Message-Id: <20230531134020.3383253-18-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230531134020.3383253-1-sashal@kernel.org> References: <20230531134020.3383253-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Johannes Thumshirn [ Upstream commit 806570c0bb7b4847828c22c4934fcf2dc8fc572f ] Since f8a53bb58ec7 ("btrfs: handle checksum generation in the storage layer") the failures of btrfs_csum_one_bio() are handled via bio_end_io(). This means, we can return BLK_STS_RESOURCE from btrfs_csum_one_bio() in case the allocation of the ordered sums fails. This also fixes a syzkaller report, where injecting a failure into the kvzalloc() call results in a BUG_ON(). Reported-by: syzbot+d8941552e21eac774778@syzkaller.appspotmail.com Reviewed-by: Christoph Hellwig Reviewed-by: Anand Jain Signed-off-by: Johannes Thumshirn Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/btrfs/file-item.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index a4584c629ba35..9e45b416a9c85 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -847,7 +847,9 @@ blk_status_t btrfs_csum_one_bio(struct btrfs_bio *bbio) sums = kvzalloc(btrfs_ordered_sum_size(fs_info, bytes_left), GFP_KERNEL); memalloc_nofs_restore(nofs_flag); - BUG_ON(!sums); /* -ENOMEM */ + if (!sums) + return BLK_STS_RESOURCE; + sums->len = bytes_left; ordered = btrfs_lookup_ordered_extent(inode, offset); -- 2.39.2