Re: [syzbot] [nilfs?] KASAN: use-after-free Read in nilfs_set_link

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On Sat 17-02-24 20:42:02, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 6f861765464f43a71462d52026fbddfc858239a5
> Author: Jan Kara <jack@xxxxxxx>
> Date:   Wed Nov 1 17:43:10 2023 +0000
> 
>     fs: Block writes to mounted block devices
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10639b34180000
> start commit:   52b1853b080a Merge tag 'i2c-for-6.7-final' of git://git.ke..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=655f8abe9fe69b3b
> dashboard link: https://syzkaller.appspot.com/bug?extid=4936b06b07f365af31cc
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11d62025e80000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13c38055e80000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: fs: Block writes to mounted block devices

The reproducers don't seem to be doing anything suspicious so I'm not sure
why the commit makes them not work anymore. There are no working
reproducers for this bug though so I'll leave it upto the nilfs maintainer
to decide what to do.

								Honza

-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR




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