Commit 36f05ae8 authored Apr 28, 2016 by Andrey Ryabinin Committed by Linus Torvalds Apr 28, 2016

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@virtuozzo.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent bdab42df

kernel/kcov.c

+1 −0

Original line number	Diff line number	Diff line
		#define pr_fmt(fmt) "kcov: " fmt

		#define DISABLE_BRANCH_PROFILING
		#include <linux/compiler.h>
		#include <linux/types.h>
		#include <linux/file.h>