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Fri, 21 Jun 2024 00:26:50 +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 v6 26/39] s390/cpacf: Unpoison the results of cpacf_trng() Date: Fri, 21 Jun 2024 02:25:00 +0200 Message-ID: <20240621002616.40684-27-iii@linux.ibm.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240621002616.40684-1-iii@linux.ibm.com> References: <20240621002616.40684-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: pFMJ3VX5eByn_XhL8lU2OEpij4dBIlvJ X-Proofpoint-GUID: RTniQi-mQ5NH7pBqPS4RncFDW36QzFEI 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=2024-06-20_11,2024-06-20_04,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 bulkscore=0 phishscore=0 impostorscore=0 malwarescore=0 mlxlogscore=780 lowpriorityscore=0 clxscore=1015 suspectscore=0 mlxscore=0 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2406140001 definitions=main-2406210001 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: B2DADA0004 X-Stat-Signature: 1qx868tn5th8jybg5apjrfh3q3onth3h X-Rspam-User: X-HE-Tag: 1718929624-725731 X-HE-Meta: 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 EY/dVSSY kAQ/70hatL+p/9xrU2gm0w+rEcyQicuhs97XR1WwX0N+t1UwnKqlq6nk532pAWU3PUDQuXodhaDYvg5CQIctjZ43mPa6lkijsJCLeBx5pTxhXFVgpOW2z8HFtnfJ/PiE6FEVPxo7kK9B43hUaE0IOjDnII5RhBiKtUf5c8CyzRbGI1EDTRI1p1KGfw5Vvr2fj/OFhTHg6nOwUrpVr/ZuqfSICKPw4B0b6LSx9sFKeksyIK8SNVe/Ae9srMvZRnz1awDbcbVUpxP8x/5pKjDuOHm9GQrpw5NlL+ljUcgWbwI5e7+aup+VwmqRK4l2FfQWwEGF+ 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 Reviewed-by: Alexander Potapenko Acked-by: Heiko Carstens Signed-off-by: Ilya Leoshkevich --- arch/s390/include/asm/cpacf.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/s390/include/asm/cpacf.h b/arch/s390/include/asm/cpacf.h index c786538e397c..dae8843b164f 100644 --- a/arch/s390/include/asm/cpacf.h +++ b/arch/s390/include/asm/cpacf.h @@ -12,6 +12,7 @@ #define _ASM_S390_CPACF_H #include +#include /* * Instruction opcodes for the CPACF instructions @@ -542,6 +543,8 @@ 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); } /**