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Tue, 2 Jan 2024 14:38:50 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 6D9C32004E; Tue, 2 Jan 2024 14:38:50 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3108320067; Tue, 2 Jan 2024 14:38:49 +0000 (GMT) Received: from osiris (unknown [9.171.22.30]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 2 Jan 2024 14:38:49 +0000 (GMT) Date: Tue, 2 Jan 2024 15:38:47 +0100 From: Heiko Carstens To: Ilya Leoshkevich Cc: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka , 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 Subject: Re: [PATCH v3 24/34] s390/cpumf: Unpoison STCCTM output buffer Message-ID: <20240102143847.6306-B-hca@linux.ibm.com> References: <20231213233605.661251-1-iii@linux.ibm.com> <20231213233605.661251-25-iii@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231213233605.661251-25-iii@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: tigr5Z3z0BxX2AirZXNHzagI1bfeH5jj X-Proofpoint-ORIG-GUID: qfT-irTXYoFc-48gwcgYv32GP9D1i41z 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=2024-01-02_04,2024-01-02_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 malwarescore=0 bulkscore=0 spamscore=0 phishscore=0 mlxlogscore=623 priorityscore=1501 suspectscore=0 clxscore=1015 mlxscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401020112 X-Rspamd-Queue-Id: 53FA540002 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: nx317pn6i3nfoywa1grxmuqe3zrcssta X-HE-Tag: 1704206342-726419 X-HE-Meta: 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 7dScsc6+ dFWpptC20/YOOW+cKx/2tMK2M50p1DDUtxz1NaIXugrMYjCfpyMss6tu8x4wou26oBt+t82EhI6pch5W3HRhVdpVOPI+7y3oRmic8N76VCJET7zZPsTYC0XTBBcja6VtvI14t0jmhRRUxnax/OoVzFckU1WTZif8Glkz5jffFx9edlbKQHU8Hxpd1kQww0wNGFFkpu2Qe9dfDKjQfQ6EJgqCJ1hOMi2GxNoeJ5qK1rzjRdd4PtI7+R+aoJ9sn0+2sUdUHA+F9QQZrFNuHN4MPH6U726WsCRTUPg23qtgzlCq7ddM5Erok4JxhElcTHVeGBGgC 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: On Thu, Dec 14, 2023 at 12:24:44AM +0100, Ilya Leoshkevich wrote: > stcctm() uses the "Q" constraint for dest, therefore KMSAN does not > understand that it fills multiple doublewords pointed to by dest, not > just one. This results in false positives. > > Unpoison the whole dest manually with kmsan_unpoison_memory(). > > Reported-by: Alexander Gordeev > Signed-off-by: Ilya Leoshkevich > --- > arch/s390/include/asm/cpu_mf.h | 6 ++++++ > 1 file changed, 6 insertions(+) Acked-by: Heiko Carstens