Commit-ID: 354ea05d0276384045fabbfd62ccd2d985defa9e
Gitweb: https://git.kernel.org/tip/354ea05d0276384045fabbfd62ccd2d985defa9e
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
AuthorDate: Sat, 25 May 2019 12:36:53 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Tue, 28 May 2019 09:06:09 -0700
rcutorture: Upper case solves the case of the vanishing NULL pointer
Various security techniques can obfuscate pointer printouts on the
console. Unfortunately, rcutorture relies on either "null" or all zeroes
to identify the last few statistics printouts at the end of the test.
These need to be identified because failing to do so will results in
false-positive complaints about grace-period hangs.
This commit therefore prints the "ver:" in capitals ("VER:") when
the RCU-protected pointer has been set to NULL, which causes rcutorture's
parse-console.sh script to correctly ignore these lines.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
---
kernel/rcu/rcutorture.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 89be0f492f78..fce4e7e6f502 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1408,8 +1408,9 @@ rcu_torture_stats_print(void)
}
pr_alert("%s%s ", torture_type, TORTURE_FLAG);
- pr_cont("rtc: %p ver: %lu tfle: %d rta: %d rtaf: %d rtf: %d ",
+ pr_cont("rtc: %p %s: %lu tfle: %d rta: %d rtaf: %d rtf: %d ",
rcu_torture_current,
+ rcu_torture_current ? "ver" : "VER",
rcu_torture_current_version,
list_empty(&rcu_torture_freelist),
atomic_read(&n_rcu_torture_alloc),
|