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From: David Sterba <dsterba@suse.cz>
To: Sidong Yang <realwakka@gmail.com>
Cc: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH] btrfs: reflink: Assure length != 0 in btrfs_extent_same()
Date: Thu, 19 Aug 2021 00:24:47 +0200	[thread overview]
Message-ID: <20210818222447.GX5047@twin.jikos.cz> (raw)
In-Reply-To: <20210818160815.1820-1-realwakka@gmail.com>

On Wed, Aug 18, 2021 at 04:08:15PM +0000, Sidong Yang wrote:
> btrfs_extent_same() cannot be called with zero length. Because when
> length is zero, it would be filtered by condition in
> btrfs_remap_file_range(). But if this function is used in other case in
> future, it can make ret as uninitialized.

Do you have a specific future in mind? Adding the assert won't hurt so
ok.

  reply	other threads:[~2021-08-18 22:27 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-18 16:08 [PATCH] btrfs: reflink: Assure length != 0 in btrfs_extent_same() Sidong Yang
2021-08-18 22:24 ` David Sterba [this message]
2021-08-18 23:22   ` Sidong Yang
2021-08-19  8:04 ` Nikolay Borisov
2021-08-19 15:32   ` Sidong Yang
2021-08-19 18:12     ` David Sterba
2021-08-20  0:32       ` Sidong Yang

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