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Subject[PATCH v2] kcov: don't profile branches in kcov
Date
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@virtuozzo.com>
---
kernel/kcov.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/kernel/kcov.c b/kernel/kcov.c
index 3efbee0..aee961f 100644
--- a/kernel/kcov.c
+++ b/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>
--
2.7.3
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