linux-kernel - Re: [PATCH 3/3] fs/btrfs: avoid null pointer dereference if reloc control has not been initialized

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Date:   Mon, 4 Jan 2021 16:11:13 +0100
From:   David Sterba <dsterba@...e.cz>
To:     Defang Bo <bodefang@....com>
Cc:     clm@...com, josef@...icpanda.com, dsterba@...e.com,
        linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] fs/btrfs: avoid null pointer dereference if reloc
 control has not been initialized

On Sun, Dec 27, 2020 at 10:55:31PM +0800, Defang Bo wrote:
> Similar to commmit<389305b2>,

Please use full commit reference like 389305b2aa68 ("btrfs: relocation:
Only remove reloc rb_trees if reloc control has been initialized")

> it turns out that fs_info::reloc_ctl can be NULL ,

Please describe how the NULL can get there.