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Wed, 19 Nov 2025 13:23:31 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C5A7820040; Wed, 19 Nov 2025 13:23:31 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 450B320043; Wed, 19 Nov 2025 13:23:31 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 19 Nov 2025 13:23:31 +0000 (GMT) From: Jens Remus To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org, Steven Rostedt Cc: Jens Remus , Josh Poimboeuf , Masami Hiramatsu , Mathieu Desnoyers , Peter Zijlstra , Ingo Molnar , Jiri Olsa , Arnaldo Carvalho de Melo , Namhyung Kim , Thomas Gleixner , Andrii Nakryiko , Indu Bhagat , "Jose E. 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Howlett" , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Heiko Carstens , Vasily Gorbik , "Steven Rostedt (Google)" Subject: [PATCH v12 10/13] unwind_user/sframe: Remove .sframe section on detected corruption Date: Wed, 19 Nov 2025 14:23:20 +0100 Message-ID: <20251119132323.1281768-11-jremus@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20251119132323.1281768-1-jremus@linux.ibm.com> References: <20251119132323.1281768-1-jremus@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: dasUaUOJpHebFMhJgsmDmO-6X7S72ESd X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTE1MDAzMiBTYWx0ZWRfX6roNHJ3Sgr5T g0w/TinR4dYGNLryUzbMNRTLxhl8RfezYgHQXTH0V+yLtFS/pADobDgArk198VDEycF6FGJaEC1 a2NlUyWg++C3zT99TEnGq+AG0k3UdOf9z2PjeeARcuXqLm9MUN6tUED45JymJn5VyhGqOR5Ruk/ vDROOJ+IcV4aBAvq2fAt3CA7lWjATXUQImh98anoIZiOjOcZJag/PfbTdV1HvkftYHXR0gsU1Lr I60+U1PmeS+vLhBjVRyKefFCuiMowm69B4LAPN4bqSW9jZWJbUSbdslhHIkrpVJ/jiy4wW+6T2z Wxti3biy8H3LHC5l6eLz4r0o+QPOq/Usib8fIBXidztr6ZMvMy/eJU1efVy/MJuzTkaHuZ6ax+b WGumD1SSFt2osQwS0n7WEHCh5ZioyQ== X-Proofpoint-ORIG-GUID: SLtu1LenXUFsCw6Xve05BxuMJ5AzEBGo X-Authority-Analysis: v=2.4 cv=XtL3+FF9 c=1 sm=1 tr=0 ts=691dc4da cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=7d_E57ReAAAA:8 a=JfrnYn6hAAAA:8 a=yPCof4ZbAAAA:8 a=mDV3o1hIAAAA:8 a=yMhMjlubAAAA:8 a=VnNF1IyMAAAA:8 a=Z4Rwk6OoAAAA:8 a=20KFwNOVAAAA:8 a=7mOBRU54AAAA:8 a=meVymXHHAAAA:8 a=UW-gzNxWWvgdzlWFvSoA:9 a=jhqOcbufqs7Y1TYCrUUU:22 a=1CNFftbPRP8L7MoqJWF3:22 a=HkZW87K1Qel5hWWM3VKY:22 a=wa9RWnbW_A1YIeRBVszw:22 a=2JgSa4NbpEOStq-L5dxp:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-19_04,2025-11-18_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 suspectscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511150032 X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 9701440003 X-Stat-Signature: o8osc86te71g8qfz8ena6rzfcqsmnqei X-Rspam-User: X-HE-Tag: 1763558656-481094 X-HE-Meta: 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 dH9dPtBB 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 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: From: Josh Poimboeuf To avoid continued attempted use of a bad .sframe section, remove it on demand when the first sign of corruption is detected. Cc: Masami Hiramatsu Cc: Mathieu Desnoyers Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Jiri Olsa Cc: Arnaldo Carvalho de Melo Cc: Namhyung Kim Cc: Thomas Gleixner Cc: Andrii Nakryiko Cc: Indu Bhagat Cc: "Jose E. Marchesi" Cc: Beau Belgrave Cc: Jens Remus Cc: Linus Torvalds Cc: Andrew Morton Cc: Florian Weimer Cc: Sam James Cc: Kees Cook Cc: "Carlos O'Donell" Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) Signed-off-by: Jens Remus --- kernel/unwind/sframe.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/unwind/sframe.c b/kernel/unwind/sframe.c index 1e877c3e5417..61340ee524c2 100644 --- a/kernel/unwind/sframe.c +++ b/kernel/unwind/sframe.c @@ -342,6 +342,10 @@ int sframe_find(unsigned long ip, struct unwind_user_frame *frame) ret = __find_fre(sec, &fde, ip, frame); end: user_read_access_end(); + + if (ret == -EFAULT) + WARN_ON_ONCE(sframe_remove_section(sec->sframe_start)); + return ret; } -- 2.48.1