From: Paul E. McKenney Date: Tue, 16 Oct 2018 12:46:58 +0000 (-0700) Subject: rcutorture: Don't do busted forward-progress testing X-Git-Tag: v5.4-rc1~1980^2^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5ac7cdc29897e5fc3f5e214f3f8c8b03ef8d7029;p=platform%2Fkernel%2Flinux-rpi.git 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 Signed-off-by: Paul E. McKenney --- diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index a4c4a24..f6e85fa 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; }