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| author | Davidlohr Bueso <dave@stgolabs.net> | 2014-09-11 20:40:21 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-09-16 13:41:06 -0700 |
| commit | d36a7a0d5e8b5bff1671723d733eb61621b0cee4 (patch) | |
| tree | 17cbd1c2542a4b587890a593446757606a4a7834 /kernel/rcu/rcutorture.c | |
| parent | 1e6757a92189278c484799ea98fc69bdc528940e (diff) | |
| download | op-kernel-dev-d36a7a0d5e8b5bff1671723d733eb61621b0cee4.zip op-kernel-dev-d36a7a0d5e8b5bff1671723d733eb61621b0cee4.tar.gz | |
torture: Address race in module cleanup
When performing module cleanups by calling torture_cleanup() the
'torture_type' string in nullified However, callers are not necessarily
done, and might still need to reference the variable. This impacts
both rcutorture and locktorture, causing printing things like:
[ 94.226618] (null)-torture: Stopping lock_torture_writer task
[ 94.226624] (null)-torture: Stopping lock_torture_stats task
Thus delay this operation until the very end of the cleanup process.
The consequence (which shouldn't matter for this kid of program) is,
of course, that we delay the window between rmmod and modprobing,
for instance in module_torture_begin().
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/rcutorture.c')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 6d15095..04c4b5a 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1514,7 +1514,7 @@ rcu_torture_cleanup(void) int i; rcutorture_record_test_transition(); - if (torture_cleanup()) { + if (torture_cleanup_begin()) { if (cur_ops->cb_barrier != NULL) cur_ops->cb_barrier(); return; @@ -1566,6 +1566,7 @@ rcu_torture_cleanup(void) "End of test: RCU_HOTPLUG"); else rcu_torture_print_module_parms(cur_ops, "End of test: SUCCESS"); + torture_cleanup_end(); } #ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD |
