linux-kernel - Re: [syzbot] [netfs?] KASAN: slab-use-after-free Read in iov_iter

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Message-ID: <CAJnrk1aumuyz9J1ZWReB+diDXffRQFr1Et1UMoyyuBRf+s272g@mail.gmail.com>
Date: Fri, 3 Jan 2025 15:11:25 -0800
From: Joanne Koong <joannelkoong@...il.com>
To: syzbot <syzbot+2625ce08c2659fb9961a@...kaller.appspotmail.com>
Cc: miklos@...redi.hu, dhowells@...hat.com, jlayton@...nel.org, 
	josef@...icpanda.com, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, mszeredi@...hat.com, netfs@...ts.linux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [netfs?] KASAN: slab-use-after-free Read in iov_iter_revert

On Thu, Jan 2, 2025 at 12:19 PM syzbot
<syzbot+2625ce08c2659fb9961a@...kaller.appspotmail.com> wrote:
>
> > #syz test git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
>
> want either no args or 2 args (repo, branch), got 1
>
> > 7a4f5418

Sorry for the late reply on this Miklos, didn't realize this was
related to my "convert direct io to use folios" change.

I think Bernd's fix in 78f2560fc ("fuse: Set *nbytesp=0 in
fuse_get_user_pages on allocation failure") should have fixed this?

#syz test git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
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