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List:       linux-ntfs-dev
Subject:    Re: [Linux-NTFS-Dev] KASAN: use-after-free Read in ntfs_read_locked_inode
From:       Dmitry Vyukov via Linux-NTFS-Dev <linux-ntfs-dev () lists ! sourceforge ! net>
Date:       2019-11-27 14:02:15
Message-ID: CACT4Y+Y1=+uGRNUk5G-m4vF4AhRTWRAngLJLGGiFmN_Y72sGeQ () mail ! gmail ! com
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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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