From: sashiko-bot@kernel.org
To: "Sasha Levin" <sashal@kernel.org>
Cc: linux-ext4@vger.kernel.org, tytso@mit.edu
Subject: Re: [PATCH AUTOSEL 6.18-5.10] ext4: reduce max cluster size to match documented 256MB limit
Date: Mon, 19 Oct 2026 15:27:47 +0000 [thread overview]
Message-ID: <sashiko-outbox-177730@kernel.org> (raw)
In-Reply-To: <20261019135441.1420968-511-sashal@kernel.org>
> From: Baokun Li <libaokun@linux.alibaba.com>
>
> [ Upstream commit afa3caf2fbc417f755f36e271c4b3c2d45ccda9d ]
>
> The mke2fs man page documents:
>
> Valid cluster-size values are from 2048 to 256M bytes per cluster.
>
> but EXT4_MAX_CLUSTER_LOG_SIZE was set to 30 (1GB), allowing crafted
> filesystem images to specify cluster sizes up to 1GB.
>
> On 32-bit systems with bigalloc enabled, the consistency check in
> ext4_handle_clustersize():
>
> s_blocks_per_group == s_clusters_per_group * (clustersize / blocksize)
> [ ... ]
> Signed-off-by: Baokun Li <libaokun@linux.alibaba.com>
> Reviewed-by: Andreas Dilger <adilger@dilger.ca>
> Link: https://patch.msgid.link/20260608111150.827117-3-libaokun@linux.alibaba.com
> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261019135441.1420968-511-sashal@kernel.org?part=1
prev parent reply other threads:[~2026-10-19 15:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20261019135441.1420968-1-sashal@kernel.org>
2026-10-19 13:44 ` [PATCH AUTOSEL 6.18-6.6] ext4: use FGP_WRITEBEGIN for tail block zeroing Sasha Levin
2026-10-19 14:04 ` sashiko-bot
2026-10-19 13:47 ` [PATCH AUTOSEL 6.18-5.10] ext4: check return value of ext4_get_block() in ext4_load_tail_bh() Sasha Levin
2026-10-19 14:32 ` sashiko-bot
2026-10-19 13:49 ` [PATCH AUTOSEL 6.18-5.10] ext4: guard against NULL s_group_info in ext4_get_group_info Sasha Levin
2026-10-19 14:53 ` sashiko-bot
2026-10-19 13:50 ` [PATCH AUTOSEL 6.18-5.10] ext4: set EXT4_STATE_NO_EXPAND in ext4_evict_inode Sasha Levin
2026-10-19 14:55 ` sashiko-bot
2026-10-19 13:51 ` [PATCH AUTOSEL 6.18-6.12] ext4: reject mount if clusters/inodes per group are not 8-aligned Sasha Levin
2026-10-19 15:06 ` sashiko-bot
2026-10-19 13:53 ` [PATCH AUTOSEL 6.18-5.10] ext4: reduce max cluster size to match documented 256MB limit Sasha Levin
2026-10-19 15:27 ` sashiko-bot [this message]
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