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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> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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