Commit-ID: 5ac7cdc29897e5fc3f5e214f3f8c8b03ef8d7029
Gitweb: https://git.kernel.org/tip/5ac7cdc29897e5fc3f5e214f3f8c8b03ef8d7029
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
AuthorDate: Tue, 16 Oct 2018 05:46:58 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxx>
CommitDate: Sat, 1 Dec 2018 12:45:42 -0800
rcutorture: Don't do busted forward-progress testing
The "busted" rcutorture type is an intentionally broken implementation
of RCU. Doing forward-progress testing on this implementation is not
particularly meaningful on the one hand and can result in fatal abuse
of the memory allocator on the other. This commit therefore disables
forward-progress testing of the "busted" rcutorture type.
Reported-by: kernel test robot <lkp@xxxxxxxxx>
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 a4c4a24bdcaa..f6e85faa4ff4 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -1900,7 +1900,8 @@ static int __init rcu_torture_fwd_prog_init(void)
{
if (!fwd_progress)
return 0; /* Not requested, so don't do it. */
- if (!cur_ops->stall_dur || cur_ops->stall_dur() <= 0) {
+ if (!cur_ops->stall_dur || cur_ops->stall_dur() <= 0 ||
+ cur_ops == &rcu_busted_ops) {
VERBOSE_TOROUT_STRING("rcu_torture_fwd_prog_init: Disabled, unsupported by RCU flavor under test");
return 0;
}
|