Hi Andrey, > > > > But in case of sync, when the MTE fault happens, it doesn't > > > > write to memory so, I think it's fine. > > > > > > Does it not? I thought MTE gets disabled and we return from the fault > > > handler and let the write instruction execute. But my memory on this > > > is foggy. And I don't have a setup right now to test. > > > > Right. when fault is hit the MTE gets disabled. > > But in kasan_test_c.c -- See the KUNIT_EXPECT_KASAN_FAIL, > > It re-enables for next test by calling kasan_enable_hw_tags(). > > But before that, does the faulting instruction get executed? After MTE > gets disabled in the fault handler. Right. in case of tag check fault, the preferred excecption return address is the instruction where TCF happen. I was lucky when running the test :\ Okay then I'll remove the invalid write in test, But I want to keep the if/else on each case with the reason I said. Thank you. -- Sincerely, Yeoreum Yun
