Re: KASAN: use-after-free Read in ntfs_read_locked_inode

Re: KASAN: use-after-free Read in ntfs_read_locked_inode

[syzbot]

syzbot has bisected this bug to:

commit 910cd32e552ea09caa89cdbe328e468979b030dd
Author: Helge Deller <deller@gmx.de>
Date:   Wed Mar 30 12:14:31 2016 +0000

     parisc: Fix and enable seccomp filter support

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=143090dee00000
start commit:   3e968c9f Merge tag 'ext4_for_linus' of git://git.kernel.or..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=163090dee00000
console output: https://syzkaller.appspot.com/x/log.txt?x=123090dee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7e8c053ac965e0dd
dashboard link: https://syzkaller.appspot.com/bug?extid=19b469021157c136116a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=142d219b800000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143029db800000

Reported-by: syzbot+19b469021157c136116a@syzkaller.appspotmail.com
Fixes: 910cd32e552e ("parisc: Fix and enable seccomp filter support")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Re: KASAN: use-after-free Read in ntfs_read_locked_inode

[Dmitry Vyukov]

On Wed, Nov 27, 2019 at 2:20 PM syzbot
<syzbot+19b469021157c136116a@syzkaller.appspotmail.com> wrote:
>
> syzbot has bisected this bug to:
>
> commit 910cd32e552ea09caa89cdbe328e468979b030dd
> Author: Helge Deller <deller@gmx.de>
> Date:   Wed Mar 30 12:14:31 2016 +0000
>
>      parisc: Fix and enable seccomp filter support

FWIW this commit somehow has an effect on x86 binary. I can reproduce
it. I've collected what I know so far here:
https://github.com/google/syzkaller/issues/1271#issuecomment-559093018
Well, actually it does not look like effect of this commit but rather
non-deterministic/hermetic kernel build.
+Al for affected x86 build bullshit

> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=143090dee00000
> start commit:   3e968c9f Merge tag 'ext4_for_linus' of git://git.kernel.or..
> git tree:       upstream
> final crash:    https://syzkaller.appspot.com/x/report.txt?x=163090dee00000
> console output: https://syzkaller.appspot.com/x/log.txt?x=123090dee00000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7e8c053ac965e0dd
> dashboard link: https://syzkaller.appspot.com/bug?extid=19b469021157c136116a
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=142d219b800000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143029db800000
>
> Reported-by: syzbot+19b469021157c136116a@syzkaller.appspotmail.com
> Fixes: 910cd32e552e ("parisc: Fix and enable seccomp filter support")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection
>
> --
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Re: KASAN: use-after-free Read in ntfs_read_locked_inode

[syzbot]

syzbot suspects this issue was fixed by commit:

commit f7c6cb1d9728dea9d9f131ef57303d6821afb0f8
Author: Stanislav Fomichev <sdf@google.com>
Date:   Wed Jul 29 00:31:03 2020 +0000

    bpf: Expose socket storage to BPF_PROG_TYPE_CGROUP_SOCK

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16480fa9900000
start commit:   3e968c9f Merge tag 'ext4_for_linus' of git://git.kernel.or..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=7e8c053ac965e0dd
dashboard link: https://syzkaller.appspot.com/bug?extid=19b469021157c136116a
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=142d219b800000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=143029db800000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: bpf: Expose socket storage to BPF_PROG_TYPE_CGROUP_SOCK

For information about bisection process see: https://goo.gl/tpsmEJ#bisection