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Tue, 5 May 2026 12:17:25 +0000 (GMT) From: Jens Remus To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, x86@kernel.org, Steven Rostedt , Josh Poimboeuf , Indu Bhagat , Peter Zijlstra , Dylan Hatch , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Mathieu Desnoyers , Kees Cook , Sam James Cc: Jens Remus , bpf@vger.kernel.org, linux-mm@kvack.org, Namhyung Kim , Andrii Nakryiko , "Jose E. Marchesi" , Beau Belgrave , Florian Weimer , "Carlos O'Donell" , Masami Hiramatsu , Jiri Olsa , Arnaldo Carvalho de Melo , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Heiko Carstens , Vasily Gorbik , Ilya Leoshkevich , "Steven Rostedt (Google)" Subject: [PATCH v14 10/19] unwind_user/sframe: Remove .sframe section on detected corruption Date: Tue, 5 May 2026 14:17:09 +0200 Message-ID: <20260505121718.3572346-11-jremus@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260505121718.3572346-1-jremus@linux.ibm.com> References: <20260505121718.3572346-1-jremus@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA1MDExNCBTYWx0ZWRfX6xUgbgTo4ceS ogZQAdgcIJIxxAM+lzBqmWsNXHd2tIdvRpsDN+Y31Ido5wd68n1WDlJruNNeSZUOEHqYFhMl5Hj sjPQllmx0M8dL11QbRovN10WbQwsUTHPyHGk/7FfBEHQ5YF3UITY8M87rG3sPebNJVuAQ/B+TRZ Tc5mjq1sUTICz70+2sYaZ0tFOdnXF6W4iET8DVRqXQbOkIXNFKr5QqxWivNbQf1pRxtljjubtjA H3P9bzHgjYBZ9MClRH2HN2JzEnKK5fVcttL7M/hhO5+d8b6zuOB8hwCB57SuC1e5d+ad/W0pVcq JFruxSg1dI6fmh1Tm6K3mQHuO/h097JMzGri0AiBn477WdIpmnBgJ0DoEukZdwMmiTib1yjqrBI fAHn80dtnB5hcsdAOilefvyqg1apcVRz3SVrQJKC2F0bpj5SOT5DC/GGHE+9nV8ti4iHa+lsWao lbIE2SxdCiWn9G0h4QA== X-Proofpoint-ORIG-GUID: ESkL7T1J9FVU0MH5Wd6VBq7slO6ISNoe X-Proofpoint-GUID: EITj1tVrY_lYmK7h90v0ZPscXET4p3YI X-Authority-Analysis: v=2.4 cv=W7UIkxWk c=1 sm=1 tr=0 ts=69f9dfda cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VwQbUJbxAAAA:8 a=meVymXHHAAAA:8 a=pGLkceISAAAA:8 a=VnNF1IyMAAAA:8 a=QUyUFLFTtUP4SZQqb90A:9 a=zZCYzV9kfG8A:10 a=2JgSa4NbpEOStq-L5dxp:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-05_02,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 spamscore=0 clxscore=1015 phishscore=0 bulkscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605050114 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: AB06B180006 X-Stat-Signature: 46fq4utrmixubfjsqmfowpt19iihoby4 X-Rspam-User: X-HE-Tag: 1777983489-207876 X-HE-Meta: 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 tXn7TlOX q5LjVqoVw7DZ0bfN0Lw2oQsAkx/6lg8hrA08c2HpsJrgGRUuw/w3HiNvPXKzZ6gfV4Q66CMU4Y/idL0hMltLvz08nAXPcoLbs53y2QhTvY8WoqlIuRvr+AxwMWFbiL240+1e1fQv89m3Ozee/jeLeJRJuRMrRKZVotvvysm7zm5G0ETXbzMiPUYZdbaMse8Dpsfn+egVgPZvDwz+crC0f0Sly3+FyqRpyoEKGANfFwW7gyXCOzSlPIG0UYrgK1saGPsy8cUM809PrNewtSp0CDER8nGP/TRJ7JHDG9xMXfRTOGDmkKnCYq5iNxJMxea3/p7hHt/FX6/59yp0UV4U8Kx6dNSRs5krebbP9L1GzcuVktZSnb6HYfeM6nDUNCJRMHdriLdXQ4B42W4x7C6KIZY634G0CrLcWnEVYt1alTkljziuJ2vujirvIG2CY8A1RTTLJzif3DZljNgpMpPZZOiVIKA== 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. Signed-off-by: Josh Poimboeuf Signed-off-by: Steven Rostedt (Google) Reviewed-by: Indu Bhagat 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 9c755965ab83..8eed6a7d9625 100644 --- a/kernel/unwind/sframe.c +++ b/kernel/unwind/sframe.c @@ -358,6 +358,10 @@ 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; } -- 2.51.0