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Tue, 21 Nov 2023 22:02:04 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3F4FA20063; Tue, 21 Nov 2023 22:02:04 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C52042005A; Tue, 21 Nov 2023 22:02:02 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.179.23.98]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 21 Nov 2023 22:02:02 +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 01/33] ftrace: Unpoison ftrace_regs in ftrace_ops_list_func() Date: Tue, 21 Nov 2023 23:00:55 +0100 Message-ID: <20231121220155.1217090-2-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 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: OE_2HhR7p8laIqszHIpA8sx3KovHtydB X-Proofpoint-ORIG-GUID: 5HzIgJAoLjwL41V8x1uA2rXIn0syQQXg 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 spamscore=0 clxscore=1015 impostorscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 X-Rspamd-Queue-Id: 1560B40029 X-Rspam-User: X-Stat-Signature: bt88jw7e54315nedkny4pkn37crsh654 X-Rspamd-Server: rspam01 X-HE-Tag: 1700604143-742205 X-HE-Meta: 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 bf1lH8+r aJyc3HM0JIzM3hBt78kt9M+d64YEmR/5qWeplFYyOtK7yqjqUVIzSqIEMp7ioo8EsLHclX1nrSW8++Gz+rPCzYLKhaQ19debyEQF/eC+GIVo4lxki+8Pkno5QreAsCtuVdHVq5lgS023BfjB0d+sKPm5F0vjhFeejTR2i/wLzooXEpaL6pIFewwq/vnv4okUF76Q6BHYQm6d8MGQHyN3H2EsfVQeTJ0pSxBogJ03ax1BJtgk4GmJzj6IDvYPRmLWJgcYB X-Bogosity: Ham, tests=bogofilter, spamicity=0.000093, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Architectures use assembly code to initialize ftrace_regs and call ftrace_ops_list_func(). Therefore, from the KMSAN's point of view, ftrace_regs is poisoned on ftrace_ops_list_func entry(). This causes KMSAN warnings when running the ftrace testsuite. Fix by trusting the architecture-specific assembly code and always unpoisoning ftrace_regs in ftrace_ops_list_func. Signed-off-by: Ilya Leoshkevich --- kernel/trace/ftrace.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c index 8de8bec5f366..dfb8b26966aa 100644 --- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -7399,6 +7399,7 @@ __ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip, void arch_ftrace_ops_list_func(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, struct ftrace_regs *fregs) { + kmsan_unpoison_memory(fregs, sizeof(*fregs)); __ftrace_ops_list_func(ip, parent_ip, NULL, fregs); } #else -- 2.41.0