linux-kernel - Re: [PATCH] reiserfs: only call unlock_new_inode() if I

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Message-ID: <20200727165215.GI1138@sol.localdomain>
Date:   Mon, 27 Jul 2020 09:52:15 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     reiserfs-devel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        syzbot+187510916eb6a14598f7@...kaller.appspotmail.com
Subject: Re: [PATCH] reiserfs: only call unlock_new_inode() if I_NEW

On Sun, Jun 28, 2020 at 12:00:57AM -0700, Eric Biggers wrote:
> From: Eric Biggers <ebiggers@...gle.com>
> 
> unlock_new_inode() is only meant to be called after a new inode has
> already been inserted into the hash table.  But reiserfs_new_inode() can
> call it even before it has inserted the inode, triggering the WARNING in
> unlock_new_inode().  Fix this by only calling unlock_new_inode() if the
> inode has the I_NEW flag set, indicating that it's in the table.
> 
> This addresses the syzbot report "WARNING in unlock_new_inode"
> (https://syzkaller.appspot.com/bug?extid=187510916eb6a14598f7).
> 
> Reported-by: syzbot+187510916eb6a14598f7@...kaller.appspotmail.com
> Signed-off-by: Eric Biggers <ebiggers@...gle.com>

Anyone interested in taking this patch?

- Eric