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Wed, 15 Nov 2023 20:34:48 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , 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 24/32] s390/cpacf: Unpoison the results of cpacf_trng() Date: Wed, 15 Nov 2023 21:30:56 +0100 Message-ID: <20231115203401.2495875-25-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231115203401.2495875-1-iii@linux.ibm.com> References: <20231115203401.2495875-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 2hiXuR6P650rcR9fEXOk8WJoi9cn7Ipv X-Proofpoint-GUID: bdGq9jciuCrxPjpJhy4v0KBztKvLqzo8 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=2023-11-15_20,2023-11-15_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 phishscore=0 mlxscore=0 lowpriorityscore=0 adultscore=0 clxscore=1015 suspectscore=0 mlxlogscore=766 spamscore=0 priorityscore=1501 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311150163 X-Rspamd-Queue-Id: 70A31140019 X-Rspam-User: X-Stat-Signature: beuog9e1iw63ii6cadog67j9gqqmpcdb X-Rspamd-Server: rspam03 X-HE-Tag: 1700080500-789560 X-HE-Meta: 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 sk6cGLct Hd3xPdc8H2WVoVws0HduWyFdTTM+NASGWpC/yXCEYBCBm4/vqgdQUS5chGfntbJaFpIFtm07Er7s97HTECTKvLzWCFEZpNsOPS23HxsnR58PnvH3jj1kzE8GKMz0Vt/fuIju5CoI7RVEv3/cRzG53PWeQIkMe84tTwC2/0KUa9gLmKeIVpiI3hdAB10PAMTqDVIIi8bYJiGsiMUvN12fd+4ERAgfGitGVThyTlZvMmThdKbgOSwBQZxvkSdNu4nuvQTSVYYVVeZsR6KU= 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: Prevent KMSAN from complaining about buffers filled by cpacf_trng() being uninitialized. Tested-by: Alexander Gordeev Signed-off-by: Ilya Leoshkevich --- arch/s390/include/asm/cpacf.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h index b378e2b57ad8..a72b92770c4b 100644 --- a/arch/s390/include/asm/cpacf.h +++ b/arch/s390/include/asm/cpacf.h @@ -473,6 +473,8 @@ static inline void cpacf_trng(u8 *ucbuf, unsigned long ucbuf_len, : [ucbuf] "+&d" (u.pair), [cbuf] "+&d" (c.pair) : [fc] "K" (CPACF_PRNO_TRNG), [opc] "i" (CPACF_PRNO) : "cc", "memory", "0"); + kmsan_unpoison_memory(ucbuf, ucbuf_len); + kmsan_unpoison_memory(cbuf, cbuf_len); } /**