On Tue, 21 Mar 2017, Dave Jones wrote:
> I just hit this while fuzzing..
>
> general protection fault: [#1] PREEMPT SMP DEBUG_PAGEALLOC
> CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.11.0-rc2-think+ #1
> task: 88017f0ed440 task.stack: c9094000
> RIP:
On Tue, 21 Mar 2017, Dave Jones wrote:
> I just hit this while fuzzing..
>
> general protection fault: [#1] PREEMPT SMP DEBUG_PAGEALLOC
> CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.11.0-rc2-think+ #1
> task: 88017f0ed440 task.stack: c9094000
> RIP:
On Tue, Mar 21, 2017 at 08:25:39PM +0100, Thomas Gleixner wrote:
> > RAX looks like list poison, and CR2 = 4, which is likely the ->next of a
> > list,
> > with a NULL pointer.
>
> Certainly not on 64 bit. that would be 8. And CR2 is irrelevant here
> because that's a #GP not a #PF.
doh!
On Tue, Mar 21, 2017 at 08:25:39PM +0100, Thomas Gleixner wrote:
> > RAX looks like list poison, and CR2 = 4, which is likely the ->next of a
> > list,
> > with a NULL pointer.
>
> Certainly not on 64 bit. that would be 8. And CR2 is irrelevant here
> because that's a #GP not a #PF.
doh!
I just hit this while fuzzing..
general protection fault: [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.11.0-rc2-think+ #1
task: 88017f0ed440 task.stack: c9094000
RIP: 0010:run_timer_softirq+0x15f/0x700
RSP: 0018:880507c03ec8 EFLAGS: 00010086
I just hit this while fuzzing..
general protection fault: [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.11.0-rc2-think+ #1
task: 88017f0ed440 task.stack: c9094000
RIP: 0010:run_timer_softirq+0x15f/0x700
RSP: 0018:880507c03ec8 EFLAGS: 00010086
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