Hi Andrea and Steve,
On Mon, 7 Jan 2019 22:34:39 +0100
Andrea Righi wrote:
> On Mon, Jan 07, 2019 at 04:28:33PM -0500, Steven Rostedt wrote:
> > On Mon, 7 Jan 2019 22:19:04 +0100
> > Andrea Righi wrote:
> >
> > > > > If we put a kretprobe to raw_spin_lock_irqsave() it looks like
> > > > > kret
On Mon, Jan 07, 2019 at 04:28:33PM -0500, Steven Rostedt wrote:
> On Mon, 7 Jan 2019 22:19:04 +0100
> Andrea Righi wrote:
>
> > > > If we put a kretprobe to raw_spin_lock_irqsave() it looks like
> > > > kretprobe is going to call kretprobe...
> > >
> > > Right, but we should be able to add som
On Mon, 7 Jan 2019 22:19:04 +0100
Andrea Righi wrote:
> > > If we put a kretprobe to raw_spin_lock_irqsave() it looks like
> > > kretprobe is going to call kretprobe...
> >
> > Right, but we should be able to add some recursion protection to stop
> > that. I have similar protection in the ftra
On Mon, Jan 07, 2019 at 02:59:18PM -0500, Steven Rostedt wrote:
> On Mon, 7 Jan 2019 20:52:09 +0100
> Andrea Righi wrote:
>
> > > Ug, kretprobe calls spinlocks in the callback? I wonder if we can
> > > remove them.
> > >
> > > I'm guessing this is a different issue than the one that this patch
>
On Mon, 7 Jan 2019 20:52:09 +0100
Andrea Righi wrote:
> > Ug, kretprobe calls spinlocks in the callback? I wonder if we can
> > remove them.
> >
> > I'm guessing this is a different issue than the one that this patch
> > fixes. This sounds like we are calling kretprobe from kretprobe?
> >
> > -
On Mon, Jan 07, 2019 at 02:27:49PM -0500, Steven Rostedt wrote:
> On Mon, 7 Jan 2019 19:34:44 +0100
> Andrea Righi wrote:
>
> > On Mon, Jan 07, 2019 at 10:31:34PM +0900, Masami Hiramatsu wrote:
> > ...
> > > BTW, this is not all of issues. To remove CONFIG_KPROBE_EVENTS_ON_NOTRACE
> > > I'm tryin
On Mon, 7 Jan 2019 19:34:44 +0100
Andrea Righi wrote:
> On Mon, Jan 07, 2019 at 10:31:34PM +0900, Masami Hiramatsu wrote:
> ...
> > BTW, this is not all of issues. To remove CONFIG_KPROBE_EVENTS_ON_NOTRACE
> > I'm trying to find out other notrace functions which can cause
> > kernel crash by prob
On Mon, Jan 07, 2019 at 10:31:34PM +0900, Masami Hiramatsu wrote:
...
> BTW, this is not all of issues. To remove CONFIG_KPROBE_EVENTS_ON_NOTRACE
> I'm trying to find out other notrace functions which can cause
> kernel crash by probing. Mostly done on x86, so I'll post it
> after this series.
Not
On Mon, Jan 07, 2019 at 10:31:34PM +0900, Masami Hiramatsu wrote:
> Hello,
>
> On recent talk with Andrea, I started more precise investigation on
> the kernel panic with kretprobes on notrace functions, which Francis
> had been reported last year ( https://lkml.org/lkml/2017/7/14/466 ).
>
> At f
Hello,
On recent talk with Andrea, I started more precise investigation on
the kernel panic with kretprobes on notrace functions, which Francis
had been reported last year ( https://lkml.org/lkml/2017/7/14/466 ).
At first, I tried to reproduce the issue. I picked up __fdget and
ftrace_ops_assist_
10 matches
Mail list logo
