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 CC0122BF3F3; Thu, 3 Apr 2025 19:10:18 +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=1743707418; cv=none; b=RKNiG2NuLspzyuOrxKbJj5ZnxzjBkxJ6wM7GIlxiyPk9X3lKiNf9DrU46eUm7dSWn4Y0Ky7rVur9LXUj/qkSqwJPd2hCAuEpHw2QFOguUw7YzLgkRqLZiyBH2PnYtgGuxQEB5CSW6x4WOF2z54X4/mtrTr4UN81Q8OJQNMbV1Ec= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743707418; c=relaxed/simple; bh=WyKlAsJ2/2pvwzjjmI56XNt6esscPGIt15CrzTuTmQE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=uscqVCiQdjpP5x//fPifO5ExGuRra5pnghwRPFI3bquYpRN9QuwxkhBFmXBOxkIyTyA/y1gIkqHEejhZHIujTn1XefDC8zTsOq/t4rVxmXB9nqmr4+j/NNNOALq7M7+qCM3erAdH0ug+zqG/Qvftz5W6dy4nlbYQwlWdWIlfU+s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VigYIOTv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VigYIOTv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 55069C4CEE8; Thu, 3 Apr 2025 19:10:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743707418; bh=WyKlAsJ2/2pvwzjjmI56XNt6esscPGIt15CrzTuTmQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VigYIOTvIYoiYV50pfLaqCcrZyXNGxBEooEb+wbq6sKnz0bp51F93jUCGlchzaGDK DbzS6Kp5Yz4ay4wPLGJCC9dPbaaEAjQymDahQQkQPPOhArB8kzsUwzU8HadO6F+0M+ 2aAhRJ0OqhnDk+Gxx9maEat9TX1RmkEX2F1t0vRRZGsvLtZeogvxGQBeBMI2au7nRH ehuo0ZyRdskCYu8frZOp7CuOakZpY+M06//khruowfRiTW8oYsW2cgVNzthRyBZoLU iX0qedJ0CVFegrSOl+kdsEF18lQNRt8qorAw8EkTxYWq9jkA/4cGHFJgiG/0NNbpdI TuTN3SQxa4KvA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Edward Adam Davis , syzbot+7c808908291a569281a9@syzkaller.appspotmail.com, Dave Kleikamp , Sasha Levin , shaggy@kernel.org, rand.sec96@gmail.com, peili.dev@gmail.com, ghanshyam1898@gmail.com, niharchaithanya@gmail.com, aha310510@gmail.com, jfs-discussion@lists.sourceforge.net Subject: [PATCH AUTOSEL 5.10 05/15] jfs: add sanity check for agwidth in dbMount Date: Thu, 3 Apr 2025 15:09:52 -0400 Message-Id: <20250403191002.2678588-5-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403191002.2678588-1-sashal@kernel.org> References: <20250403191002.2678588-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 5.10.235 Content-Transfer-Encoding: 8bit From: Edward Adam Davis [ Upstream commit ddf2846f22e8575d6b4b6a66f2100f168b8cd73d ] The width in dmapctl of the AG is zero, it trigger a divide error when calculating the control page level in dbAllocAG. To avoid this issue, add a check for agwidth in dbAllocAG. Reported-and-tested-by: syzbot+7c808908291a569281a9@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=7c808908291a569281a9 Signed-off-by: Edward Adam Davis Signed-off-by: Dave Kleikamp Signed-off-by: Sasha Levin --- fs/jfs/jfs_dmap.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 3cc10f9bf9f8b..8f4c55c711ba0 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -204,6 +204,10 @@ int dbMount(struct inode *ipbmap) bmp->db_aglevel = le32_to_cpu(dbmp_le->dn_aglevel); bmp->db_agheight = le32_to_cpu(dbmp_le->dn_agheight); bmp->db_agwidth = le32_to_cpu(dbmp_le->dn_agwidth); + if (!bmp->db_agwidth) { + err = -EINVAL; + goto err_release_metapage; + } bmp->db_agstart = le32_to_cpu(dbmp_le->dn_agstart); bmp->db_agl2size = le32_to_cpu(dbmp_le->dn_agl2size); if (bmp->db_agl2size > L2MAXL2SIZE - L2MAXAG || -- 2.39.5