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Tue, 27 Jan 2026 15:06:00 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 83F4520040; Tue, 27 Jan 2026 15:06:00 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2B0DB20049; Tue, 27 Jan 2026 15:06:00 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 27 Jan 2026 15:06:00 +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 v13 09/18] unwind_user/sframe: Remove .sframe section on detected corruption Date: Tue, 27 Jan 2026 16:05:44 +0100 Message-ID: <20260127150554.2760964-10-jremus@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260127150554.2760964-1-jremus@linux.ibm.com> References: <20260127150554.2760964-1-jremus@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTI3MDEyMSBTYWx0ZWRfX9dtk6uVtCdRH tId1yvkI/H1UbXz8xpStDEIEFjEeDs3gX4Cjmp1gwSeJXDevIO7Q5AvsjrI0jrVqaNT5MxBciba kG7KAPlvsNLuDOqiNAymSs6nn6sk3PsRsBPh2sM2FOGSP6h+JatzEodqXGtSiJk/7Sgdr0Xn4np xr6DcR75zPNll8nF9sG0qL7zyfxKmq1kb37+3/bbyMTHJmfDhPEnmlI4qe0o1x8ERGNK9YYJDuN uNwfS0y4tWbDRv97l5Uti//o/gXaLQ4OcDSmyt77bqCP/ppfNVHlcPHF40JV1uMkK7btskDJi6C yHWrRetluRtVzj1Rgv+xC2SUigjUuckoGQP8weTOtY8RxkDjyqJFEUIC+Xh3oNJAJuhRfkK4F+I ccVrRHGErH2WtobWDmGe1YoJJoM70hWn9WR+Bgv7V6n6qSgvzWng4q5w0mTA+Sbo82gAvqAcS2e NY5o8zkeQGH2vIbR7Rw== X-Proofpoint-GUID: 5XHuKtAdbWHV3NOc049IMGl0YAFe-Nfy X-Proofpoint-ORIG-GUID: OjNNiXWl2C9A79lDqi2h7zSLQYwtqHvm X-Authority-Analysis: v=2.4 cv=X+Vf6WTe c=1 sm=1 tr=0 ts=6978d45e cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=vUbySO9Y5rIA: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:6.1.51,FMLib:17.12.100.49 definitions=2026-01-27_03,2026-01-27_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 impostorscore=0 lowpriorityscore=0 clxscore=1015 spamscore=0 adultscore=0 malwarescore=0 bulkscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2601150000 definitions=main-2601270121 X-Rspamd-Server: rspam11 X-Stat-Signature: pr3m11n8pb7nwaaqf9ysk6p6of6oqamg X-Rspam-User: X-Rspamd-Queue-Id: E88E61A000B X-HE-Tag: 1769526390-355390 X-HE-Meta: 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 uJSqC6R9 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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 6004b43aac34..9a63f8828593 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