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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Aug 2025 06:21:24.4135 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 33435f38-c872-4616-8ade-08ddda31a0f3 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AMS1EPF00000044.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB6649 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