Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-09 Thread Eric Biggers
On Thu, May 09, 2019 at 04:22:56PM +0200, 'Dmitry Vyukov' via syzkaller wrote: > > > > > Can the KVM maintainers take a look at this? This doesn't have > > > > > anything to do > > > > > with my commit that syzbot bisected it to. > > > > > > > > > > +Dmitry, statistics lession: if a crash occurs

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-09 Thread Dmitry Vyukov
> > > > Can the KVM maintainers take a look at this? This doesn't have > > > > anything to do > > > > with my commit that syzbot bisected it to. > > > > > > > > +Dmitry, statistics lession: if a crash occurs only 1 in 10 times, as > > > > was the > > > > case here, then often it will happen 0 in

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-08 Thread Eric Biggers
On Wed, May 08, 2019 at 06:58:28PM +0200, 'Dmitry Vyukov' via syzkaller-bugs wrote: > From: Dmitry Vyukov > Date: Wed, May 8, 2019 at 1:25 PM > To: Eric Biggers > Cc: syzbot, KVM list, , David Miller, Artem > Bityutskiy, , Josh Poimboeuf, LKML, > , Andy Lutomirski, Ingo Molnar, Peter > Zijlstra,

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-08 Thread Dmitry Vyukov
From: Dmitry Vyukov Date: Wed, May 8, 2019 at 1:25 PM To: Eric Biggers Cc: syzbot, KVM list, , David Miller, Artem Bityutskiy, , Josh Poimboeuf, LKML, , Andy Lutomirski, Ingo Molnar, Peter Zijlstra, Richard Weinberger, Rik van Riel, Steven Rostedt, syzkaller-bugs, Thomas Gleixner > From: Eric Big

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-08 Thread Dmitry Vyukov
From: Steven Rostedt Date: Thu, May 2, 2019 at 5:10 AM To: Eric Biggers Cc: syzbot, Dmitry Vyukov, , , , , , , , , , , , , , , > On Wed, 1 May 2019 19:34:27 -0700 > Eric Biggers wrote: > > > > Call Trace: > > > smp_call_function_many+0x750/0x8c0 kernel/smp.c:434 > > > smp_call_function+0x42/0

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-08 Thread Dmitry Vyukov
From: Eric Biggers Date: Thu, May 2, 2019 at 4:34 AM To: syzbot, Dmitry Vyukov, Cc: , , , , , , , , , , , , , , > On Wed, May 01, 2019 at 07:36:05AM -0700, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit:baf76f0c slip: make slhc_free() silently acce

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-01 Thread Steven Rostedt
On Wed, 1 May 2019 19:34:27 -0700 Eric Biggers wrote: > > Call Trace: > > smp_call_function_many+0x750/0x8c0 kernel/smp.c:434 > > smp_call_function+0x42/0x90 kernel/smp.c:492 > > on_each_cpu+0x31/0x200 kernel/smp.c:602 > > text_poke_bp+0x107/0x19b arch/x86/kernel/alternative.c:821 > > __jump

Re: BUG: soft lockup in kvm_vm_ioctl

2019-05-01 Thread Eric Biggers
On Wed, May 01, 2019 at 07:36:05AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:baf76f0c slip: make slhc_free() silently accept an error p.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1407f57f20 > kernel

BUG: soft lockup in kvm_vm_ioctl

2019-05-01 Thread syzbot
Hello, syzbot found the following crash on: HEAD commit:baf76f0c slip: make slhc_free() silently accept an error p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1407f57f20 kernel config: https://syzkaller.appspot.com/x/.config?x=a42d110b47dd6b36 da