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Wed, 19 Jun 2024 15:45:39 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Heiko Carstens , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka Cc: Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle , Ilya Leoshkevich Subject: [PATCH v5 16/37] mm: slub: Let KMSAN access metadata Date: Wed, 19 Jun 2024 17:43:51 +0200 Message-ID: <20240619154530.163232-17-iii@linux.ibm.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240619154530.163232-1-iii@linux.ibm.com> References: <20240619154530.163232-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: X1A64wlGihlD-vkt6OPN4QbqSNyzZDYi X-Proofpoint-GUID: QwrJ4a0sDZe-t-98SqnNYovNNBktH9kb X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-19_02,2024-06-19_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 phishscore=0 malwarescore=0 adultscore=0 clxscore=1015 priorityscore=1501 impostorscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 suspectscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406190115 X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: AD4A04000F X-Stat-Signature: dh774weur71ox378yu34esiam1izyudw X-Rspam-User: X-HE-Tag: 1718814394-522309 X-HE-Meta: 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 QTgQlCQz sdlxNfOLW4obdGkRZfKGWRdn85uTTnsBh3kE4j3hrIfyL23Wek2LwZrzSGqrw5L1aCF4uxvPRCnFNDFrEtzIwzTFXCE2Ay1D1CWN3qQtZ2jOr2H9WrBOKICnd91/TmA8e4fKr51l7p8fuColovJxomaBAH3D+gxmuuEIUIEhsJYqKZMaq7RUeFE8VdXaKW4/Q3e/u8AxrwBoWfJE6Mz0pvz/wRtyN8D2TkwsCTlDhUlrs4q8rYdhHG6A77JpLJ7s8sVMV1TxbNQkhbvZWK0nhnGzLOQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000006, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Building the kernel with CONFIG_SLUB_DEBUG and CONFIG_KMSAN causes KMSAN to complain about touching redzones in kfree(). Fix by extending the existing KASAN-related metadata_access_enable() and metadata_access_disable() functions to KMSAN. Acked-by: Vlastimil Babka Reviewed-by: Alexander Potapenko Signed-off-by: Ilya Leoshkevich --- mm/slub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/slub.c b/mm/slub.c index 1134091abac5..b050e528112c 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -829,10 +829,12 @@ static int disable_higher_order_debug; static inline void metadata_access_enable(void) { kasan_disable_current(); + kmsan_disable_current(); } static inline void metadata_access_disable(void) { + kmsan_enable_current(); kasan_enable_current(); }