linux-ext4 - Re: [PATCH v2 1/4] ext4: fix out of bounds punch offset

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Message-ID: <174775151765.432196.17776440436332077240.b4-ty@mit.edu>
Date: Tue, 20 May 2025 10:40:20 -0400
From: "Theodore Ts'o" <tytso@....edu>
To: linux-ext4@...r.kernel.org, Zhang Yi <yi.zhang@...weicloud.com>
Cc: "Theodore Ts'o" <tytso@....edu>, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, adilger.kernel@...ger.ca, jack@...e.cz,
        wanghaichi0403@...il.com, yi.zhang@...wei.com, libaokun1@...wei.com,
        yukuai3@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH v2 1/4] ext4: fix out of bounds punch offset


On Tue, 06 May 2025 09:20:06 +0800, Zhang Yi wrote:
> Punching a hole with a start offset that exceeds max_end is not
> permitted and will result in a negative length in the
> truncate_inode_partial_folio() function while truncating the page cache,
> potentially leading to undesirable consequences.
> 
> A simple reproducer:
> 
> [...]

Applied, thanks!

[1/4] ext4: fix out of bounds punch offset
      commit: b5e58bcd79625423487fa3ecba8e8411b5396327
[2/4] ext4: fix incorrect punch max_end
      commit: 29ec9bed2395061350249ae356fb300dd82a78e7
[3/4] ext4: factor out ext4_get_maxbytes()
      commit: dbe27f06fa38b9bfc598f8864ae1c5d5831d9992
[4/4] ext4: ensure i_size is smaller than maxbytes
      commit: 1a77a028a392fab66dd637cdfac3f888450d00af

Best regards,
-- 
Theodore Ts'o <tytso@....edu>