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 8BFDF264A93; Thu, 3 Apr 2025 19:05:01 +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=1743707101; cv=none; b=p2+I7IxbpP8eMLGJcccpKSwH47BKUuVDWMut2NZieeTXBYradZaGnYklV5/Hpo5tvMHrdoyjAAbqcGFEQUatglHUfXoKsvXuDhRICYYIJPQdm3Btf+6WTwC9Yn5elmwCVgYWc6MLE6FOLRZigUqxjQcROYEa8Vi6RVnOpAYeoPk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743707101; c=relaxed/simple; bh=DKtMNqkGSl3Jk+kOCm2sYF+Agp8jjR0lL5uamaFFRtQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=XWi5X7k8MlWF1z5H/WgAGtNkvOvsjlXUKsIkgsZo1HCwrtbjsP2K9G4cbcXbJta9XrQ2oh1xVT/3gB1nEemKpO0pZUWiKJ3HPDchyhZH3kS9SBG4WHiDeXdjb4TEn0gipw5qa2qJ8al2ItFAN7j1L5oPv3GmtBFNyr/b2XWyAKU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tiLL+yPS; 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="tiLL+yPS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B9D9EC4CEE3; Thu, 3 Apr 2025 19:04:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1743707101; bh=DKtMNqkGSl3Jk+kOCm2sYF+Agp8jjR0lL5uamaFFRtQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tiLL+yPS/LJfBuhh/BimlqYqd5DmNsxUbAGfgM2P9tFyPrPzlP69b9E2OXlumxTOW Gd8B2mAJmnzwo/qQihomaeFmuV5E6oiSTz6vHoHm81ySf4sX87gcHspW6pgD/ZAk8o CmeeHRSGA1+DlT5vr8lmM6vvCcZG4XIfx7M1aOfAq9YH/8aTmDLQPML5UudV9V3O96 l86lWFdWms84zypz1A7fJzWcOWraQ9C0uTo9PaII/sx9MYZt3OuXPhYtR80waOOTv/ S1wIMzzhPA7GF/n4qsdxszfd0izRhM31qlHycDjulAcF9HbOPKNnxbqRO5+Y+h7PV1 ryXwl8xAwKjNA== 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, rbrasga@uci.edu, niharchaithanya@gmail.com, aha310510@gmail.com, ghanshyam1898@gmail.com, jfs-discussion@lists.sourceforge.net Subject: [PATCH AUTOSEL 6.13 22/49] jfs: add sanity check for agwidth in dbMount Date: Thu, 3 Apr 2025 15:03:41 -0400 Message-Id: <20250403190408.2676344-22-sashal@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250403190408.2676344-1-sashal@kernel.org> References: <20250403190408.2676344-1-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 6.13.9 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 9ac1fc2ed05bc..0e1019382cf51 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