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Wed, 13 Dec 2023 23:36:48 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A6EB02004B; Wed, 13 Dec 2023 23:36:48 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 40B7220043; Wed, 13 Dec 2023 23:36:47 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.171.70.156]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 13 Dec 2023 23:36:47 +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 v3 25/34] s390/diag: Unpoison diag224() output buffer Date: Thu, 14 Dec 2023 00:24:45 +0100 Message-ID: <20231213233605.661251-26-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231213233605.661251-1-iii@linux.ibm.com> References: <20231213233605.661251-1-iii@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 1cQ1gAU1Iv4juOXeCfxDVhgu2689iazJ X-Proofpoint-GUID: iGbdxxrIYcgZBGhmP7OXYB1v889bVZ49 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-13_14,2023-12-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 clxscore=1015 mlxlogscore=999 suspectscore=0 adultscore=0 malwarescore=0 impostorscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312130167 X-Rspamd-Queue-Id: 4C79E20002 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: moh3w6funs4eswcnq8u891gpknyc5kry X-HE-Tag: 1702513986-471237 X-HE-Meta: U2FsdGVkX1/FXZatqAYg8UU/gOgzXbfyFTIpZjIYj0a6UnneU2AEvlmu5dLtGAbnzJR2CHIKSj3hYt+ATg7AlAGrlARwci855X2ivQvi/gCcS4m+s9A5ePV1tWD+lBJRpE8K851xS9kpPaJkV8IZpPEWkRdCBPHagMJF4aAias9r/pDtO9ybBmxMEHRXhuEwe/FGeBqJiWGW9ebFOmIhuvXBchN3Rj/cAgMqR47tl3RF5LJKwFowAiUr6KBymTAu9H1beU9KKn966sXtXZswj48TAW5qJz6W2EaAZafr3ThPm0Bk+2eF4np5DE7wS2ODnQJWhOcM+OVrwqaDZL99FIM2b0r1nAoRcFiRQ80w0aBen8rIS+JQJerBUvEn4Fg2eHgc1KAPTaZOyx63ooP51jBdhlpGgQqQqRGuTea7t1gToBdj7sQqlRfW2k0+pba4zU2DD3HIPP0WRxK3+2UcgHAvVNCAs+poQogNKsJBKxsC2hTU5Iq6RgR4c/7e4jwMMcSHIAstR2gRzpf6ZmIPj6H3vi8T3x5Zw+4sCbQrOPlgS1sIS2fxOjGtayXzvVUPQ7MfdMFAS7aqzuSfXS6d8L2CFFsByx+iyaMvl0OVAWL6DkTZM3sBVMFNljzqBLmcG6sXO/PzYjwojOw/ReJ+bgV0/0vDPSXssRR/N3aEw/KZuixRhvoxRgXsS1KEx7ItBdndhW08BHDE9g5Qcx5yqPY9h1dQ/n8GqRC7wVD/HKbrC4qENVuq8Uz8Vq1G3EbtNp97/XkWMQdl2tjaA+7dJZAcWfZMccybmH9goI6d/uQN5yZz0Gb+JoOFj48IbV39xUdQAJdB/F/iJyvdS8Ag58y26BUP5b7e/YSh1/vAPKjkb94ygq/OfFk3yUHd3HL5CNPjSVz/7RWhuFWJemSLEv05UwxB6tdRrE6MJwplm1zbQ1h2ZXrSS53Ua9UWespHNmvc2uRTbgIq9Cg84gw nyvrOFSd HehbEwArH3EP5dEsVlHBWV4UF0xCxJkSDrNBYI5fSV1x9yGMp4291sZfKy5N0Slat7FTr3M9SvJHU9IqvbuILt5gGBeL4DisDt755l5IvgWibkGH0jsHT0E4uN0Q6hTUdObxEJ0OFXh+vEBT3NBJ8E0avkVpmwgNJ1TEO13KODfIjKhu4K7n0mKLa1JMsnqIOZSGvu8SKLUi0laZpiiyVJZ5q6P6PrEERsJqNuUwGRkgZsUFPY7pznPpjHKq/oJz8iQxb X-Bogosity: Ham, tests=bogofilter, spamicity=0.000058, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Diagnose 224 stores 4k bytes, which cannot be deduced from the inline assembly constraints. This leads to KMSAN false positives. Unpoison the output buffer manually with kmsan_unpoison_memory(). Signed-off-by: Ilya Leoshkevich --- arch/s390/kernel/diag.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c index 92fdc35f028c..fb83a21014d0 100644 --- a/arch/s390/kernel/diag.c +++ b/arch/s390/kernel/diag.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -255,6 +256,7 @@ int diag224(void *ptr) "1:\n" EX_TABLE(0b,1b) : "+d" (rc) :"d" (0), "d" (addr) : "memory"); + kmsan_unpoison_memory(ptr, PAGE_SIZE); return rc; } EXPORT_SYMBOL(diag224); -- 2.43.0