diff options
| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2016-04-28 16:18:55 -0700 |
|---|---|---|
| committer | Amit Pundir <amit.pundir@linaro.org> | 2018-01-22 13:15:43 +0530 |
| commit | 928e92557326799be24ed4d45f348dd7d37f9ca8 (patch) | |
| tree | 55dac593910e9aff43d05845582962a2328bece3 /kernel | |
| parent | 318c10553b7ca7308138d878aecd98d6483a7b91 (diff) | |
UPSTREAM: 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>
Bug: 64145065
(cherry-picked from 36f05ae8bce904b4c8105363e6227a79d343bda6)
Change-Id: I53cea027ba86b89016df3944374bdb119a2ca9dd
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kcov.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/kcov.c b/kernel/kcov.c index 78bed7125515..a02f2dddd1d7 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> |