| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20251120151033.3840508-25-elver@google.com> Date: Thu, 20 Nov 2025 16:09:49 +0100 From: Marco Elver <elver@...gle.com> To: elver@...gle.com, Peter Zijlstra <peterz@...radead.org>, Boqun Feng <boqun.feng@...il.com>, Ingo Molnar <mingo@...nel.org>, Will Deacon <will@...nel.org> Cc: "David S. Miller" <davem@...emloft.net>, Luc Van Oostenryck <luc.vanoostenryck@...il.com>, Chris Li <sparse@...isli.org>, "Paul E. McKenney" <paulmck@...nel.org>, Alexander Potapenko <glider@...gle.com>, Arnd Bergmann <arnd@...db.de>, Bart Van Assche <bvanassche@....org>, Christoph Hellwig <hch@....de>, Dmitry Vyukov <dvyukov@...gle.com>, Eric Dumazet <edumazet@...gle.com>, Frederic Weisbecker <frederic@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Herbert Xu <herbert@...dor.apana.org.au>, Ian Rogers <irogers@...gle.com>, Jann Horn <jannh@...gle.com>, Joel Fernandes <joelagnelf@...dia.com>, Johannes Berg <johannes.berg@...el.com>, Jonathan Corbet <corbet@....net>, Josh Triplett <josh@...htriplett.org>, Justin Stitt <justinstitt@...gle.com>, Kees Cook <kees@...nel.org>, Kentaro Takeda <takedakn@...data.co.jp>, Lukas Bulwahn <lukas.bulwahn@...il.com>, Mark Rutland <mark.rutland@....com>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Miguel Ojeda <ojeda@...nel.org>, Nathan Chancellor <nathan@...nel.org>, Neeraj Upadhyay <neeraj.upadhyay@...nel.org>, Nick Desaulniers <nick.desaulniers+lkml@...il.com>, Steven Rostedt <rostedt@...dmis.org>, Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>, Thomas Gleixner <tglx@...utronix.de>, Thomas Graf <tgraf@...g.ch>, Uladzislau Rezki <urezki@...il.com>, Waiman Long <longman@...hat.com>, kasan-dev@...glegroups.com, linux-crypto@...r.kernel.org, linux-doc@...r.kernel.org, linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-security-module@...r.kernel.org, linux-sparse@...r.kernel.org, linux-wireless@...r.kernel.org, llvm@...ts.linux.dev, rcu@...r.kernel.org Subject: [PATCH v4 24/35] compiler-context-analysis: Introduce header suppressions While we can opt in individual subsystems which add the required annotations, such subsystems inevitably include headers from other subsystems which may not yet have the right annotations, which then result in false positive warnings. Making compatible by adding annotations across all common headers currently requires an excessive number of __no_context_analysis annotations, or carefully analyzing non-trivial cases to add the correct annotations. While this is desirable long-term, providing an incremental path causes less churn and headaches for maintainers not yet interested in dealing with such warnings. Rather than clutter headers unnecessary and mandate all subsystem maintainers to keep their headers working with context analysis, suppress all -Wthread-safety warnings in headers. Explicitly opt in headers with context-enabled primitives. With this in place, we can start enabling the analysis on more complex subsystems in subsequent changes. Signed-off-by: Marco Elver <elver@...gle.com> --- v4: * Rename capability -> context analysis. --- scripts/Makefile.context-analysis | 4 +++ scripts/context-analysis-suppression.txt | 32 ++++++++++++++++++++++++ 2 files changed, 36 insertions(+) create mode 100644 scripts/context-analysis-suppression.txt diff --git a/scripts/Makefile.context-analysis b/scripts/Makefile.context-analysis index 70549f7fae1a..cd3bb49d3f09 100644 --- a/scripts/Makefile.context-analysis +++ b/scripts/Makefile.context-analysis @@ -4,4 +4,8 @@ context-analysis-cflags := -DWARN_CONTEXT_ANALYSIS \ -fexperimental-late-parse-attributes -Wthread-safety \ -Wthread-safety-pointer -Wthread-safety-beta +ifndef CONFIG_WARN_CONTEXT_ANALYSIS_ALL +context-analysis-cflags += --warning-suppression-mappings=$(srctree)/scripts/context-analysis-suppression.txt +endif + export CFLAGS_CONTEXT_ANALYSIS := $(context-analysis-cflags) diff --git a/scripts/context-analysis-suppression.txt b/scripts/context-analysis-suppression.txt new file mode 100644 index 000000000000..df25c3d07a5b --- /dev/null +++ b/scripts/context-analysis-suppression.txt @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# The suppressions file should only match common paths such as header files. +# For individual subsytems use Makefile directive CONTEXT_ANALYSIS := [yn]. +# +# The suppressions are ignored when CONFIG_WARN_CONTEXT_ANALYSIS_ALL is +# selected. + +[thread-safety] +src:*arch/*/include/* +src:*include/acpi/* +src:*include/asm-generic/* +src:*include/linux/* +src:*include/net/* + +# Opt-in headers: +src:*include/linux/bit_spinlock.h=emit +src:*include/linux/cleanup.h=emit +src:*include/linux/kref.h=emit +src:*include/linux/list*.h=emit +src:*include/linux/local_lock*.h=emit +src:*include/linux/lockdep.h=emit +src:*include/linux/mutex*.h=emit +src:*include/linux/rcupdate.h=emit +src:*include/linux/refcount.h=emit +src:*include/linux/rhashtable.h=emit +src:*include/linux/rwlock*.h=emit +src:*include/linux/rwsem.h=emit +src:*include/linux/seqlock*.h=emit +src:*include/linux/spinlock*.h=emit +src:*include/linux/srcu*.h=emit +src:*include/linux/ww_mutex.h=emit -- 2.52.0.rc1.455.g30608eb744-goog
Powered by blists - more mailing lists