From: David Hildenbrand <david@redhat.com>
To: Dmitry Vyukov <dvyukov@google.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Cc: "Andy Lutomirski" <luto@kernel.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
syzbot
<bot+1f445b1009b8eeededa30fe62ccf685f2ec9d155@syzkaller.appspotmail.com>,
"Borislav Petkov" <bp@suse.de>,
"Dmitry Safonov" <dsafonov@virtuozzo.com>,
"Peter Anvin" <hpa@zytor.com>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Kyle Huey" <me@kylehuey.com>, "Ingo Molnar" <mingo@redhat.com>,
syzkaller-bugs@googlegroups.com,
"the arch/x86 maintainers" <x86@kernel.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"KVM list" <kvm@vger.kernel.org>,
tianyu.lan@intel.com, "James Mattson" <jmattson@google.com>,
"Wanpeng Li" <kernellwp@gmail.com>
Subject: Re: BUG: unable to handle kernel paging request in __switch_to
Date: Fri, 15 Dec 2017 10:51:56 +0100 [thread overview]
Message-ID: <1036ed60-035c-70a0-0a5f-00efe8ebf4da@redhat.com> (raw)
In-Reply-To: <CACT4Y+buFtqoO6KF0ZW1HQTMC3rVZ=_0FQq826TmWLZyxkPcwA@mail.gmail.com>
> int main()
> {
> int fd = open("/dev/kvm", 0x80102ul);
> int vm = ioctl(fd, KVM_CREATE_VM, 0);
> int cpu = ioctl(vm, KVM_CREATE_VCPU, 4);
Not even a memory region :) So maybe the first memory access directly
triggers a fault?
> ioctl(cpu, KVM_RUN, 0);
> return 0;
> }
>
> And, yes, this in fact triggers instant reboot of kernel (running in qemu).
> Am I missing something here?
>
> +kvm maintainers, you can see full thread here:
> https://groups.google.com/forum/#!topic/syzkaller-bugs/_oveOKGm3jw
>
--
Thanks,
David / dhildenb
next prev parent reply other threads:[~2017-12-15 9:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <001a1145e8548cbd3d055f73374f@google.com>
2017-12-14 17:12 ` Thomas Gleixner
2017-12-14 18:42 ` Linus Torvalds
2017-12-14 18:54 ` Andy Lutomirski
2017-12-14 19:28 ` Linus Torvalds
2017-12-14 21:27 ` Andy Lutomirski
2017-12-14 21:39 ` Linus Torvalds
2017-12-15 9:07 ` Dmitry Vyukov
2017-12-15 9:13 ` Dmitry Vyukov
2017-12-15 9:38 ` Dmitry Vyukov
2017-12-15 9:40 ` Wanpeng Li
2017-12-15 9:51 ` David Hildenbrand [this message]
2017-12-15 9:58 ` Wanpeng Li
2017-12-15 10:02 ` Dmitry Vyukov
2017-12-15 16:16 ` Andy Lutomirski
2017-12-15 16:44 ` Ingo Molnar
2017-12-19 11:48 ` Dmitry Vyukov
2017-12-15 9:49 ` Thomas Gleixner
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