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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id t24-20020aa79478000000b0056be1d7d4a3sm8668553pfq.73.2022.11.09.12.00.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Nov 2022 12:00:51 -0800 (PST) From: Kees Cook To: Jann Horn Cc: Kees Cook , Greg KH , Linus Torvalds , Seth Jenkins , Andy Lutomirski , Petr Mladek , Andrew Morton , tangmeng , "Guilherme G. Piccoli" , Tiezhu Yang , Sebastian Andrzej Siewior , "Eric W. Biederman" , Arnd Bergmann , Marco Elver , Dmitry Vyukov , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Vincenzo Frascino , Luis Chamberlain , David Gow , "Paul E. McKenney" , Jonathan Corbet , Baolin Wang , "Jason A. Donenfeld" , Eric Biggers , Huang Ying , Anton Vorontsov , Mauro Carvalho Chehab , Laurent Dufour , Rob Herring , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-hardening@vger.kernel.org Subject: [PATCH next v2 0/6] exit: Put an upper limit on how often we can oops Date: Wed, 9 Nov 2022 12:00:43 -0800 Message-Id: <20221109194404.gonna.558-kees@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1576; h=from:subject:message-id; bh=f6yYT1z0j34/tTr0B+65L7ktUKTQPrMyBqrftF9wr6M=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBjbAbvE87tT3kRd5r9yYOWLJwPzhKiyHMFu0vH4T8P yoDh5syJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCY2wG7wAKCRCJcvTf3G3AJitzEA CncSpVOXlgXdbb/hwP3379EIiZDAVaMRKgUjhCrB5C1AG8xFxO6JBJoQ4+l2O231mX/ddD+z+SYMfX HHZ95D8VX3sAWmOtoadA7shTHqEF0FsiXkKpQl7f6JgcaNkKdJ+q2tS3f9H6r92zj3NC0e+WJLLAEl hZ68EYM1yBHu3NbBwKNCGg2c0yF6si6geFbjeUnYiOy6tW6UYvePIrwcwCn7KlYhqgl4KNv36+jWHc Y778i1cRX76eeiUzpHniT2B2T0Evn913bHmuLUL+FIttpmCIIKod6ACYcJcj/GNRNqzRV07wl0Key/ z2s25RNqy72RUf87fAkxXXF1SUj/Zlyrtv+1amMRLYK+YJZk2xVsnpjJ12EXvXy1aRog1ya0Uu2Xbh JiED6THw9bgM6qjUfC1P3K+hxbbADTaXDKq/YmanOFpM2dQ0x6gPSL9K77ITM4epSlnxzEFYPW38VO aey2ABBPLLf1x6INkY63BahlYSW0lEFsPq/SwtRtk96yvfx7cnX/3s5yJ69e/KOOeqympJ94EqAHMS uiHCzAG5wBKimts9Ev+ASgD5grPm+aNTMzg7YGHLR1H8CtIvP14gAmvYaDBunKlhjowNMBxntTuhq/ yQXowZnvWi80+NGf5Y6I3gintRa/hcEra2VTAWXPBDlREGitdn3tljFvyzMA== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=PhMz0SvI; spf=pass (imf26.hostedemail.com: domain of keescook@chromium.org designates 209.85.214.174 as permitted sender) smtp.mailfrom=keescook@chromium.org; dmarc=pass (policy=none) header.from=chromium.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1668024055; a=rsa-sha256; cv=none; b=owHVvRecRlCeH/n0vGsp9dzYSR3rMzPeZ2RP0jlqxsoUDqjBAzs39x/aW6w+Vc5erhzQl2 /IgpbD3isNJAilX6geyjNcGH4krv52jO9eqvGknGsTR38WSADsIqmHTP9REPyetmq4Myp2 hH3ZqBrveQC+VR0Z6CQHI8298F2/pZ0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1668024055; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=KGQv9g3ODjs6GFRrqXnKxOhm5DKhXRVSdXb+tdSOpIY=; b=PNUi22H6ulDlTtQJ10uK1jwpHH578oL6ogb3Y/xoRG2bHxZCkBxyZq3BOtc+TZ+4lNISY6 pFarWyXhbKj+TNnw7Zpa4CiSGlU865mXl8CTKkCcFmvw3FT0y8gNzqTTjmTerrFZKu3U/K ehxdMDq8QuPIgNFma7QvKimXeR2bV5U= X-Stat-Signature: fchjwntkq45xxdw8bzh18y53gxd8x6ot X-Rspamd-Queue-Id: 5520F14001D Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=chromium.org header.s=google header.b=PhMz0SvI; spf=pass (imf26.hostedemail.com: domain of keescook@chromium.org designates 209.85.214.174 as permitted sender) smtp.mailfrom=keescook@chromium.org; dmarc=pass (policy=none) header.from=chromium.org X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1668024055-950439 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: Hi, This builds on Jann's v1 patch[1]. Changes in v2: - move sysctl into kernel/exit.c (where it belongs) - expand Documentation slightly New stuff in v2: - expose oops_count to sysfs - consolidate panic_on_warn usage - introduce warn_limit - expose warn_count to sysfs [1] https://lore.kernel.org/lkml/20221107201317.324457-1-jannh@google.com Jann Horn (1): exit: Put an upper limit on how often we can oops Kees Cook (5): panic: Separate sysctl logic from CONFIG_SMP exit: Expose "oops_count" to sysfs panic: Consolidate open-coded panic_on_warn checks panic: Introduce warn_limit panic: Expose "warn_count" to sysfs .../ABI/testing/sysfs-kernel-oops_count | 6 ++ .../ABI/testing/sysfs-kernel-warn_count | 6 ++ Documentation/admin-guide/sysctl/kernel.rst | 17 ++++++ MAINTAINERS | 2 + include/linux/panic.h | 1 + kernel/exit.c | 60 +++++++++++++++++++ kernel/kcsan/report.c | 3 +- kernel/panic.c | 44 +++++++++++++- kernel/sched/core.c | 3 +- lib/ubsan.c | 3 +- mm/kasan/report.c | 4 +- mm/kfence/report.c | 3 +- 12 files changed, 139 insertions(+), 13 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-kernel-oops_count create mode 100644 Documentation/ABI/testing/sysfs-kernel-warn_count -- 2.34.1