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

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Message-ID: <CAJfpegsM7b=edYUJvwrvVye+PUDXN_1BwN9bKCU1_aq5_NJuqA@mail.gmail.com>
Date: Thu, 2 Jan 2025 22:12:20 +0100
From: Miklos Szeredi <miklos@...redi.hu>
To: syzbot <syzbot+2625ce08c2659fb9961a@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [fuse?] KASAN: slab-use-after-free Read in iov_iter_revert

#syz dup: KASAN: null-ptr-deref Read in fuse_copy_do

On Thu, 2 Jan 2025 at 21:51, syzbot
<syzbot+2625ce08c2659fb9961a@...kaller.appspotmail.com> wrote:
>
> Hello,
>
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
>
> Reported-by: syzbot+2625ce08c2659fb9961a@...kaller.appspotmail.com
> Tested-by: syzbot+2625ce08c2659fb9961a@...kaller.appspotmail.com
>
> Tested on:
>
> commit:         7a4f5418 fuse: fix direct io folio offset and length c..
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse.git
> console output: https://syzkaller.appspot.com/x/log.txt?x=129af818580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=a0669984e46cc674
> dashboard link: https://syzkaller.appspot.com/bug?extid=2625ce08c2659fb9961a
> compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
>
> Note: no patches were applied.
> Note: testing is done by a robot and is best-effort only.