Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2019-01-09 Thread Dmitry Vyukov
On Wed, Jan 2, 2019 at 3:08 PM Dmitry Vyukov wrote: > > On Fri, Dec 28, 2018 at 10:09 PM Linus Torvalds > wrote: > > > > On Fri, Dec 28, 2018 at 1:43 AM Dmitry Vyukov wrote: > > > > > > > Nobody reads the kernel mailing list directly - there's just too much > > > > traffic. > > > > > > As the r

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2019-01-07 Thread Paolo Bonzini
On 27/12/18 17:59, Linus Torvalds wrote: > So the issue seems to be that syzbot is simply not useful enough. It's > output is too rough for people to take it seriously. You see how the > report by Wei Wu then got traction, because Wei took a syzbot report > and added some human background and disti

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2019-01-02 Thread Dmitry Vyukov
On Fri, Dec 28, 2018 at 10:09 PM Linus Torvalds wrote: > > On Fri, Dec 28, 2018 at 1:43 AM Dmitry Vyukov wrote: > > > > > Nobody reads the kernel mailing list directly - there's just too much > > > traffic. > > > > As the result bug reports and patches got lots and this is bad and it > > would b

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2019-01-02 Thread Dmitry Vyukov
On Fri, Dec 28, 2018 at 11:13 PM Joey Pabalinas wrote: > > On Fri, Dec 28, 2018 at 10:43:11AM +0100, 'Dmitry Vyukov' via syzkaller wrote: > > On Thu, Dec 27, 2018 at 6:00 PM Linus Torvalds > > wrote: > > > Nobody reads the kernel mailing list directly - there's just too much > > > traffic. > >

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-12-28 Thread Joey Pabalinas
On Fri, Dec 28, 2018 at 10:43:11AM +0100, 'Dmitry Vyukov' via syzkaller wrote: > On Thu, Dec 27, 2018 at 6:00 PM Linus Torvalds > wrote: > > Nobody reads the kernel mailing list directly - there's just too much > > traffic. > > As the result bug reports and patches got lots and this is bad and

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-12-28 Thread Linus Torvalds
On Fri, Dec 28, 2018 at 1:43 AM Dmitry Vyukov wrote: > > > Nobody reads the kernel mailing list directly - there's just too much > > traffic. > > As the result bug reports and patches got lots and this is bad and it > would be useful to stop it from happening and there are known ways for > this.

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-12-28 Thread Dmitry Vyukov
On Thu, Dec 27, 2018 at 6:00 PM Linus Torvalds wrote: > > On Thu, Dec 27, 2018 at 6:28 AM Dmitry Vyukov wrote: > > > > Lots of kernel bug reports routinely get lost on mailing lists, which is > > bad. > > Nobody reads the kernel mailing list directly - there's just too much traffic. > > And hone

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-12-27 Thread Linus Torvalds
On Thu, Dec 27, 2018 at 6:28 AM Dmitry Vyukov wrote: > > Lots of kernel bug reports routinely get lost on mailing lists, which is bad. Nobody reads the kernel mailing list directly - there's just too much traffic. And honestly, even fewer people then read the syzbot reports, because they are so

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-12-27 Thread Dmitry Vyukov
On Sun, Nov 25, 2018 at 6:31 PM Paolo Bonzini wrote: > > On 20/11/18 09:34, Wanpeng Li wrote: > > From: Wanpeng Li > > ... > > This patch fixes it by bailing out scan ioapic if ioapic is not initialized > > in > > kernel. > > Reported-by: Wei Wu +Linus, Greg I want to point out that this was

Re: [PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-11-25 Thread Paolo Bonzini
On 20/11/18 09:34, Wanpeng Li wrote: > From: Wanpeng Li > > Reported by syzkaller: > > BUG: unable to handle kernel NULL pointer dereference at 01c8 > PGD 8003ec4da067 P4D 8003ec4da067 PUD 3f7bfa067 PMD 0 > Oops: [#1] PREEMPT SMP PTI > CPU: 7 PID: 5059 Comm: debug T

[PATCH] KVM: X86: Fix scan ioapic use-before-initialization

2018-11-20 Thread Wanpeng Li
From: Wanpeng Li Reported by syzkaller: BUG: unable to handle kernel NULL pointer dereference at 01c8 PGD 8003ec4da067 P4D 8003ec4da067 PUD 3f7bfa067 PMD 0 Oops: [#1] PREEMPT SMP PTI CPU: 7 PID: 5059 Comm: debug Tainted: G OE 4.19.0-rc5 #16 RIP: 0010: