Re: [PATCH v2 2/4] ext4: fix extent status cache clearing when truncating inline data

[sashiko-bot@kernel.org]

> From: Zhang Yi <yi.zhang@huawei.com>
> 
> ext4_inline_data_truncate() clears the whole extent status tree of the
> inode when it truncates the inline data, with
> 
> 	ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
> 
> It does that when the inode still carries inline data while the
> EXT4_STATE_MAY_INLINE_DATA state bit is already cleared.  This is the
> case once an inline-to-extent conversion has been initiated, which is
> triggered by a delalloc buffered write larger than the inline space in
> ext4_da_convert_inline_data_to_extent().
> 
> The clear is meant to drop stale extent status entries of such an inode
> to prevent stale extents and stale reserved space after the conversion,
> [ ... ]
> 
> Reported-by: syzbot ci <syzbot+ci46f64f7b6a2a188e@syzkaller.appspotmail.com>
> Closes: https://lore.kernel.org/linux-ext4/6ac92a4c.70ed5d86.2ac85.0072.GAE@google.com/
> Fixes: 0add491df4e5 ("ext4: remove extent cache entries when truncating inline data")
> Signed-off-by: Zhang Yi <yi.zhang@huawei.com>

Sashiko has reviewed this patch and found no issues.

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