torture: Make torture.sh KCSAN runs set CONFIG_RCU_TORTURE_TEST_CHK_RDR_STATE=y

The RCU_TORTURE_TEST_CHK_RDR_STATE Kconfig option is used for low-level
debugging of rcutorture's generation of overlapping and nested RCU
readers.  It incurs significant overhead, and is thus not to be used
lightly.  But if it is not tested regularly, it won't be there when it
is needed, for example, it would have found an rcutorture bug in the
testing of srcu_up_read().

This commit therefore uses CONFIG_RCU_TORTURE_TEST_CHK_RDR_STATE=y when
building KCSAN kernels, but only for the --do-rcutorture case.

Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay (AMD) <neeraj.upadhyay@kernel.org>

diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
index c518de2968711c1f7a53d709d56424a6a0b07137..53f61f278fd73915a2e4040a98d4eed3a7540525 100755 (executable)
--- a/tools/testing/selftests/rcutorture/bin/torture.sh
+++ b/tools/testing/selftests/rcutorture/bin/torture.sh
@@ -378,7 +378,12 @@ function torture_set {
                        kcsan_kmake_tag="--kmake-args"
                        cur_kcsan_kmake_args="$kcsan_kmake_args"
                fi
-               torture_one "$@" --kconfig "CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y" $kcsan_kmake_tag $cur_kcsan_kmake_args --kcsan
+               chk_rdr_state=
+               if test "${flavor}" = rcutorture
+               then
+                       chk_rdr_state="CONFIG_RCU_TORTURE_TEST_CHK_RDR_STATE=y"
+               fi
+               torture_one "$@" --kconfig "CONFIG_DEBUG_LOCK_ALLOC=y CONFIG_PROVE_LOCKING=y ${chk_rdr_state}" $kcsan_kmake_tag $cur_kcsan_kmake_args --kcsan
                mv $T/last-resdir $T/last-resdir-kcsan || :
        fi
 }