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Tue, 21 Nov 2023 22:02:31 +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 v2 16/33] mm: slub: Let KMSAN access metadata Date: Tue, 21 Nov 2023 23:01:10 +0100 Message-ID: <20231121220155.1217090-17-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231121220155.1217090-1-iii@linux.ibm.com> References: <20231121220155.1217090-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Kr3chWIa4VLpaiM7it2xt72zkEIATI76 X-Proofpoint-GUID: o0Elbdg3uNB8jhs-NEltJ60ebAxZlMmP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-21_12,2023-11-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 priorityscore=1501 spamscore=0 impostorscore=0 mlxlogscore=999 bulkscore=0 mlxscore=0 malwarescore=0 adultscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 X-Rspamd-Queue-Id: 7CA812000F X-Rspam-User: X-Stat-Signature: fs9d7h54x1tfuqszu9matgdngdx35d56 X-Rspamd-Server: rspam03 X-HE-Tag: 1700604166-579100 X-HE-Meta: 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 nKLJUI8k T+yBfTd0R0gQsq7kk/Z4zA9ylXEIgITKwao+tQoG/EJJxmoYrNCMg7Wr9l2aVGXfQgeZ1UWg4k7VyAn3Nw9B7T6v+c9zRStgVpV2cNMOkH0E3dKJ0y9HPCAlywsPhfLe9jA/Jeb1R13JDyUdp/fEZhBGElEt9Gw6ec//l96V1dU4oQW5dDrk+lHe3RZS2R8iR9IDCxaAd4Iz4f5fC1r4WYq8X3CwW/1hq2rRibpchIeeXWpus+lOiW7V7kg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000190, 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. Signed-off-by: Ilya Leoshkevich Acked-by: Vlastimil Babka --- mm/slub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/slub.c b/mm/slub.c index 169e5f645ea8..6e61c27951a4 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -700,10 +700,12 @@ 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(); }