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Howlett" , Lorenzo Stoakes , Michal Hocko , Mike Rapoport , Suren Baghdasaryan , Vlastimil Babka , Heiko Carstens , Vasily Gorbik , "Steven Rostedt (Google)" Subject: [PATCH v11 12/15] unwind_user/sframe: Remove .sframe section on detected corruption Date: Wed, 22 Oct 2025 16:43:23 +0200 Message-ID: <20251022144326.4082059-13-jremus@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20251022144326.4082059-1-jremus@linux.ibm.com> References: <20251022144326.4082059-1-jremus@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=FMYWBuos c=1 sm=1 tr=0 ts=68f8ed9c cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=x6icFKpwvdMA: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 a=DXsff8QfwkrTrK3sU8N1:22 a=Z5ABNNGmrOfJ6cZ5bIyy:22 a=bWyr8ysk75zN3GCy5bjg:22 X-Proofpoint-GUID: oIfbTVUHrtJTM2sJS9G0pLw8GqDZEzBu X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMDE4MDAyMiBTYWx0ZWRfXwegpPzeg2E+p 7+nycJkGH2Hh5HOJ4QsLTQwzT4xDfXrK9qzadu87TG6iOmlx629vMVI2xDWyaOQnfmaUazqGstr EBRkEwTah98rMV29uFn/JiqMJuDY/KZbM5YxAZp65OEba2naOUMXcd2AgmxRhxSucJvkhfeDfAz QGx/nCihqHf7gMhT1uIm8R3yEoVyS0D4/0ViYKIOjDEPo2AitYEoRv2M/cl0a7PNNmHWHT42f8X RCkorJjylj+XAZklmQiVuXRAS938hNhDyrE4jMr4pxO7MXZbHSMuIESYIbfss69TxyKUyXBDqca vVhFr7fHKLRcQOZhHrzGKjdOr4RQB+7GyOoOzaZJ9Uaz3pZcp+ubQpRJJWsV/E0+3nCNFHs6yBX HW69YsHOYW1ub8GBR4EKWDVwuF80HA== X-Proofpoint-ORIG-GUID: ogu6EK98f3Zp9jHjZugcAbyQjHZxAOjy X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-10-22_05,2025-10-13_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 priorityscore=1501 adultscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 phishscore=0 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510020000 definitions=main-2510180022 X-Rspamd-Server: rspam05 X-Stat-Signature: bxqqkkyiu7gyxrygkxm8opz5o5bprhs5 X-Rspam-User: X-Rspamd-Queue-Id: AA6B32000E X-HE-Tag: 1761144250-20626 X-HE-Meta: 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 cTVSotgP 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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 bc3e2eb00325..77ef1f0bb9c5 100644 --- a/kernel/unwind/sframe.c +++ b/kernel/unwind/sframe.c @@ -330,6 +330,10 @@ int sframe_find(unsigned long ip, struct unwind_user_frame *frame) ret = __find_fre(sec, &fde, fde_start_base, ip, frame); end: user_read_access_end(); + + if (ret == -EFAULT) + WARN_ON_ONCE(sframe_remove_section(sec->sframe_start)); + return ret; } -- 2.48.1