From: Borislav Petkov <bp@alien8.de>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: syzbot <syzbot+370a6b0f11867bf13515@syzkaller.appspotmail.com>,
Frederic Weisbecker <frederic@kernel.org>,
"Gustavo A. R. Silva" <gustavo@embeddedor.com>,
"H. Peter Anvin" <hpa@zytor.com>,
LKML <linux-kernel@vger.kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
syzkaller-bugs <syzkaller-bugs@googlegroups.com>,
Thomas Gleixner <tglx@linutronix.de>,
the arch/x86 maintainers <x86@kernel.org>
Subject: Re: WARNING in arch_install_hw_breakpoint
Date: Wed, 27 Mar 2019 16:17:25 +0100 [thread overview]
Message-ID: <20190327151725.GH32571@zn.tnic> (raw)
In-Reply-To: <CACT4Y+bHd938t-w++LBO-yHMWP1cXpn+U=AVL+8mMfTBYk86=g@mail.gmail.com>
On Wed, Mar 27, 2019 at 02:45:24PM +0100, Dmitry Vyukov wrote:
> And run this program:
> https://syzkaller.appspot.com/text?tag=ReproC&x=15439f27200000
Yap, that worked in my guest, after segfaulting a lot first:
[ 101.600512][ T7333] Code: Bad RIP value.
[ 101.606103][ T7337] repro[7337]: segfault at 155555585 ip 0000000155555585 sp 00007ffff7fdaf10 error 14 in repro[555555554000+1000]
[ 101.606248][ T7338] repro[7338]: segfault at 25555554e ip 000000025555554e sp 00007ffff7fdaf10 error 14 in repro[555555554000+1000]
[ 101.608498][ T7337] Code: Bad RIP value.
[ 101.610442][ T7338] Code: Bad RIP value.
[ 101.611417][ T7341] repro[7341]: segfault at 0 ip 0000000000000000 sp 00000000200002c8 error 14
[ 101.613342][ T7341] Code: Bad RIP value.
[ 101.613798][ T7345] repro[7345]: segfault at 0 ip 0000000000000000 sp 00000000200002c8 error 14
[ 101.614292][ T7342] repro[7342]: segfault at 45555554e ip 000000045555554e sp 00007ffff7f98f10 error 14 in repro[555555554000+1000]
[ 101.615809][ T7345] Code: Bad RIP value.
[ 101.616777][ T7348] repro[7348]: segfault at 155555585 ip 0000000155555585 sp 00007ffff7fdaf10 error 14 in repro[555555554000+1000]
[ 101.616802][ T7348] Code: Bad RIP value.
[ 101.617733][ T7342] Code: Bad RIP value.
[ 105.321676][T11024] ------------[ cut here ]------------
[ 105.324183][T11024] Can't find any breakpoint slot
[ 105.324229][T11024] WARNING: CPU: 0 PID: 11024 at arch/x86/kernel/hw_breakpoint.c:121 arch_install_hw_breakpoint+0x2d1/0x3a0
...
Thx.
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2019-03-27 15:17 UTC|newest]
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2019-03-24 9:07 ` Borislav Petkov
2019-03-24 13:07 ` Dmitry Vyukov
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2019-03-24 10:03 ` syzbot
2019-03-27 13:28 ` Borislav Petkov
2019-03-27 13:45 ` Dmitry Vyukov
2019-03-27 15:17 ` Borislav Petkov [this message]
2019-03-27 17:48 ` Borislav Petkov
2019-03-28 5:27 ` Frederic Weisbecker
2019-12-08 15:33 ` syzbot
2019-12-10 0:10 ` Kees Cook
2019-12-10 9:23 ` Christian Brauner
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