* Steven Rostedt wrote:
> On Mon, 13 Jun 2016 19:13:45 -0400
> Steven Rostedt wrote:
>
>
> > > # cd /sys/kernel/debug/tracing
> > > # echo p copy_user_enhanced_fast_string+5 > kprobe_events
> > > # echo 1 > events/kprobes/enable
> > >
> > > And you'll see a kernel panic on do_debug(),
On Mon, 13 Jun 2016 19:20:19 -0400
Steven Rostedt wrote:
> On Mon, 13 Jun 2016 19:13:45 -0400
> Steven Rostedt wrote:
>
>
> > > # cd /sys/kernel/debug/tracing
> > > # echo p copy_user_enhanced_fast_string+5 > kprobe_events
> > > # echo 1 > events/kprobes/enable
> > >
> > > And you'll se
On Mon, 13 Jun 2016 19:13:45 -0400
Steven Rostedt wrote:
> > # cd /sys/kernel/debug/tracing
> > # echo p copy_user_enhanced_fast_string+5 > kprobe_events
> > # echo 1 > events/kprobes/enable
> >
> > And you'll see a kernel panic on do_debug(), since the debug
> > trap is not handled by kp
On Sat, 11 Jun 2016 23:06:53 +0900
Masami Hiramatsu wrote:
> Fix kprobe_fault_handler to clear TF (trap flag) bit of
> flags register in the case of fault fixup on single-stepping.
>
> If we put a kprobe on the instruction which can cause a
> page fault (e.g. actual mov instructions in copy_user
On Sat, Jun 11, 2016 at 11:06:53PM +0900, Masami Hiramatsu wrote:
> Fix kprobe_fault_handler to clear TF (trap flag) bit of
> flags register in the case of fault fixup on single-stepping.
>
> If we put a kprobe on the instruction which can cause a
> page fault (e.g. actual mov instructions in copy
Fix kprobe_fault_handler to clear TF (trap flag) bit of
flags register in the case of fault fixup on single-stepping.
If we put a kprobe on the instruction which can cause a
page fault (e.g. actual mov instructions in copy_user_*),
that fault happens on a single-stepping buffer. In this
case, kpro
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