Benjamin Herrenschmidt writes:
> On Thu, 2013-09-05 at 17:18 +0530, Aneesh Kumar K.V wrote:
>> Paul Mackerras writes:
>>
>> > On Thu, Sep 05, 2013 at 12:47:02PM +0530, Aneesh Kumar K.V wrote:
>> >
>> >> @@ -280,6 +280,13 @@ int __kprobes do_page_fault(struct pt_regs *regs,
>> >> unsigned long
On Thu, 2013-09-05 at 17:18 +0530, Aneesh Kumar K.V wrote:
> Paul Mackerras writes:
>
> > On Thu, Sep 05, 2013 at 12:47:02PM +0530, Aneesh Kumar K.V wrote:
> >
> >> @@ -280,6 +280,13 @@ int __kprobes do_page_fault(struct pt_regs *regs,
> >> unsigned long address,
> >>
> >>perf_sw_event(PER
Paul Mackerras writes:
> On Thu, Sep 05, 2013 at 12:47:02PM +0530, Aneesh Kumar K.V wrote:
>
>> @@ -280,6 +280,13 @@ int __kprobes do_page_fault(struct pt_regs *regs,
>> unsigned long address,
>>
>> perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
>>
>> +/*
>> + * We
On Thu, Sep 05, 2013 at 12:47:02PM +0530, Aneesh Kumar K.V wrote:
> @@ -280,6 +280,13 @@ int __kprobes do_page_fault(struct pt_regs *regs,
> unsigned long address,
>
> perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
>
> + /*
> + * We want to do this outside mmap_sem
From: "Aneesh Kumar K.V"
stack_grow_into/14082 is trying to acquire lock:
(&mm->mmap_sem){++}, at: [] .might_fault+0x78/0xe0
but task is already holding lock:
(&mm->mmap_sem){++}, at: [] .do_page_fault+0x24c/0x910
other info that might help us debug this:
Possible unsafe lockin
