linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: fix deadlock in f2f2_add

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Message-ID: <20230826025838.1131325-1-lizhi.xu@windriver.com>
Date:   Sat, 26 Aug 2023 10:58:38 +0800
From:   Lizhi Xu <lizhi.xu@...driver.com>
To:     <chao@...nel.org>
CC:     <jaegeuk@...nel.org>, <linux-f2fs-devel@...ts.sourceforge.net>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [f2fs-dev] [PATCH] f2fs: fix deadlock in f2f2_add_dentry

On Fri, 25 Aug 2023 18:41:38, chao@...nel.org wrote:
> Can you please check below patch? it has fixed reported issue.
>
> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/?h=dev&id=5c13e2388bf3426fd69a89eb46e50469e9624e56
> 
> Feedback from syzbot:
> 
> https://lore.kernel.org/linux-f2fs-devel/0000000000001ba17a0603b5871e@google.com/
This fix uses nest lock to avoid deadlocks, which I personally believe is feasible.