The patch titled
Subject: kcov: don't profile branches in kcov
has been added to the -mm tree. Its filename is
kcov-dont-profile-branches-in-kcov.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kcov-dont-profile-branches-in-kcov.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kcov-dont-profile-branches-in-kcov.patch
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------------------------------------------------------
From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Subject: kcov: don't profile branches in kcov
Profiling 'if' statements in __sanitizer_cov_trace_pc() leads to
unbound recursion and crash:
__sanitizer_cov_trace_pc() ->
ftrace_likely_update ->
__sanitizer_cov_trace_pc() ...
Define DISABLE_BRANCH_PROFILING to disable this tracer.
Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/kcov.c | 1 +
1 file changed, 1 insertion(+)
diff -puN kernel/kcov.c~kcov-dont-profile-branches-in-kcov kernel/kcov.c
--- a/kernel/kcov.c~kcov-dont-profile-branches-in-kcov
+++ a/kernel/kcov.c
@@ -1,5 +1,6 @@
#define pr_fmt(fmt) "kcov: " fmt
+#define DISABLE_BRANCH_PROFILING
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/file.h>
_
Patches currently in -mm which might be from aryabinin@xxxxxxxxxxxxx are
kcov-dont-profile-branches-in-kcov.patch
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