While __noinstr already contained __no_sanitize_coverage, it needs to
be added to __init and __head section markings to support the Clang
implementation of CONFIG_KSTACK_ERASE. This is to make sure the stack
depth tracking callback is not executed in unsupported contexts.
The other sanitizer cover
GCC appears to have kind of fragile inlining heuristics, in the
sense that it can change whether or not it inlines something based on
optimizations. It looks like the kcov instrumentation being added (or in
this case, removed) from a function changes the optimization results,
and some functions mar
GCC appears to have kind of fragile inlining heuristics, in the
sense that it can change whether or not it inlines something based on
optimizations. It looks like the kcov instrumentation being added (or in
this case, removed) from a function changes the optimization results,
and some functions mar
Wire up CONFIG_KSTACK_ERASE to Clang 21's new stack depth tracking
callback[1] option.
Link: https://clang.llvm.org/docs/SanitizerCoverage.html#tracing-stack-depth [1]
Signed-off-by: Kees Cook
---
Cc: Arnd Bergmann
Cc: Masahiro Yamada
Cc: Nathan Chancellor
Cc: Nicolas Schier
Cc: Marco Elver
v4:
- rebase on for-next/hardening tree (took subset of v3 patches)
- improve commit logs for x86 and arm64 changes (Mike, Will, Ard)
v3: https://lore.kernel.org/lkml/20250717231756.make.423-k...@kernel.org/
v2: https://lore.kernel.org/lkml/20250523043251.it.550-k...@kernel.org/
v1: https:/
