Messages in this thread | | | Date | Mon, 10 Aug 2020 16:06:48 +0200 | From | peterz@infradea ... | Subject | Re: [PATCH] kcsan: Treat runtime as NMI-like with interrupt tracing |
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On Mon, Aug 10, 2020 at 10:07:44AM +0200, Marco Elver wrote: > On Fri, 7 Aug 2020 at 19:06, Paul E. McKenney <paulmck@kernel.org> wrote: > > On Fri, Aug 07, 2020 at 11:00:31AM +0200, Marco Elver wrote: > > > Since KCSAN instrumentation is everywhere, we need to treat the hooks > > > NMI-like for interrupt tracing. In order to present an as 'normal' as > > > possible context to the code called by KCSAN when reporting errors, we > > > need to update the IRQ-tracing state. > > > > > > Tested: Several runs through kcsan-test with different configuration > > > (PROVE_LOCKING on/off), as well as hours of syzbot testing with the > > > original config that caught the problem (without CONFIG_PARAVIRT=y, > > > which appears to cause IRQ state tracking inconsistencies even when > > > KCSAN remains off, see Link). > > > > > > Link: https://lkml.kernel.org/r/0000000000007d3b2d05ac1c303e@google.com > > > Fixes: 248591f5d257 ("kcsan: Make KCSAN compatible with new IRQ state tracking") > > > Reported-by: syzbot+8db9e1ecde74e590a657@syzkaller.appspotmail.com > > > Co-developed-by: Peter Zijlstra (Intel) <peterz@infradead.org> > > Peter, if you're fine with it, I think we'll require your > Signed-off-by (since Co-developed-by).
Sure:
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
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