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authorMarco Elver <elver@google.com>2019-11-14 21:02:58 +0300
committerPaul E. McKenney <paulmck@kernel.org>2019-11-16 18:23:14 +0300
commit0ebba7141eadc4804ec5b4bb5106331b0c3abf4c (patch)
treea617750df8458739f01d1255ab33249f1de4b25f /kernel/sched/Makefile
parent5f5c971292b43fed68273d5cba7202f6bd953df9 (diff)
downloadlinux-0ebba7141eadc4804ec5b4bb5106331b0c3abf4c.tar.xz
build, kcsan: Add KCSAN build exceptions
This blacklists several compilation units from KCSAN. See the respective inline comments for the reasoning. Signed-off-by: Marco Elver <elver@google.com> Acked-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/sched/Makefile')
-rw-r--r--kernel/sched/Makefile6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile
index 21fb5a5662b5..e9307a9c54e7 100644
--- a/kernel/sched/Makefile
+++ b/kernel/sched/Makefile
@@ -7,6 +7,12 @@ endif
# that is not a function of syscall inputs. E.g. involuntary context switches.
KCOV_INSTRUMENT := n
+# There are numerous races here, however, most of them due to plain accesses.
+# This would make it even harder for syzbot to find reproducers, because these
+# bugs trigger without specific input. Disable by default, but should re-enable
+# eventually.
+KCSAN_SANITIZE := n
+
ifneq ($(CONFIG_SCHED_OMIT_FRAME_POINTER),y)
# According to Alan Modra <alan@linuxcare.com.au>, the -fno-omit-frame-pointer is
# needed for x86 only. Why this used to be enabled for all architectures is beyond