[RFC PATCH v2 07/14] kcov: exclude kcov_dataflow.o from sanitizer instrumentation
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Yunseong Kim
Jun 11, 2026, 12:21:56 PMJun 11
to Ingo Molnar, Peter Zijlstra, Juri Lelli, Vincent Guittot, Dietmar Eggemann, Steven Rostedt, Ben Segall, Mel Gorman, Valentin Schneider, K Prateek Nayak, Andrey Konovalov, Alexander Potapenko, Dmitry Vyukov, Andrew Morton, Miguel Ojeda, Boqun Feng, Gary Guo, Björn Roy Baron, Benno Lossin, Andreas Hindborg, Alice Ryhl, Trevor Gross, Danilo Krummrich, Nathan Chancellor, Nicolas Schier, Nick Desaulniers, Bill Wendling, Justin Stitt, Kees Cook, David Hildenbrand, Lorenzo Stoakes, Liam R. Howlett, Vlastimil Babka, Mike Rapoport, Suren Baghdasaryan, Michal Hocko, Shuah Khan, Jonathan Corbet, Shuah Khan, Yunseong Kim, linux-...@vger.kernel.org, kasa...@googlegroups.com, rust-fo...@vger.kernel.org, linux-...@vger.kernel.org, ll...@lists.linux.dev, linu...@kvack.org, linux-k...@vger.kernel.org, work...@vger.kernel.org, linu...@vger.kernel.org, Yeoreum Yun
Exclude kcov_dataflow.o from KCOV, KASAN, KCSAN, UBSAN, and KMSAN
instrumentation, matching the exclusions already applied to kcov.o.
Without this, sanitizers instrumenting the dataflow callbacks would
cause infinite recursion.
Signed-off-by: Yunseong Kim <yunseo...@est.tech>
---
kernel/Makefile | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/Makefile b/kernel/Makefile
index b70e524c4074..307b7fd1e1f9 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -44,6 +44,12 @@ KCSAN_SANITIZE_kcov.o := n
UBSAN_SANITIZE_kcov.o := n
KMSAN_SANITIZE_kcov.o := n
+KCOV_INSTRUMENT_kcov_dataflow.o := n
+KASAN_SANITIZE_kcov_dataflow.o := n
+KCSAN_SANITIZE_kcov_dataflow.o := n
+UBSAN_SANITIZE_kcov_dataflow.o := n
+KMSAN_SANITIZE_kcov_dataflow.o := n
+
CONTEXT_ANALYSIS_kcov.o := y
CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector
--
2.43.0
instrumentation, matching the exclusions already applied to kcov.o.
Without this, sanitizers instrumenting the dataflow callbacks would
cause infinite recursion.
Signed-off-by: Yunseong Kim <yunseo...@est.tech>
---
kernel/Makefile | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/Makefile b/kernel/Makefile
index b70e524c4074..307b7fd1e1f9 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -44,6 +44,12 @@ KCSAN_SANITIZE_kcov.o := n
UBSAN_SANITIZE_kcov.o := n
KMSAN_SANITIZE_kcov.o := n
+KCOV_INSTRUMENT_kcov_dataflow.o := n
+KASAN_SANITIZE_kcov_dataflow.o := n
+KCSAN_SANITIZE_kcov_dataflow.o := n
+UBSAN_SANITIZE_kcov_dataflow.o := n
+KMSAN_SANITIZE_kcov_dataflow.o := n
+
CONTEXT_ANALYSIS_kcov.o := y
CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector
--
2.43.0
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