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

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Message-ID: <000000000000f75b0c06093b006d@google.com>
Date:   Fri, 03 Nov 2023 01:08:04 -0700
From:   syzbot <syzbot+d31adfb277377ef8fcba@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org, lizhi.xu@...driver.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [iommu?] KASAN: slab-use-after-free Read in iommufd_vfio_ioas

Hello,

syzbot tried to test the proposed patch but the build/boot failed:

./include/linux/stddef.h:8:14: error: incompatible types when assigning to type 'struct iommufd_object' from type 'void *'

Tested on:

commit:         2af9b20d Merge tag 'x86-urgent-2023-10-28' of git://gi..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel config:  https://syzkaller.appspot.com/x/.config?x=cb98fe061049a6e4
dashboard link: https://syzkaller.appspot.com/bug?extid=d31adfb277377ef8fcba
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=178165a0e80000