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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 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 264AF20007 X-Stat-Signature: jjjgoxcjca6junerc95346sh9d53o94h X-Rspam-User: X-HE-Tag: 1755066089-845319 X-HE-Meta: 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 DAm/mOJf 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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