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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-12-02 17:52:07 -0800 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-01-06 17:17:21 -0800 |
| commit | edf7b8417834c89d00ef88355ea507b0b0a630ae (patch) | |
| tree | 97368f70d1f1dc38c0f86dad65871ad0c903a83f /kernel/rcu | |
| parent | 8a67a20bf257ca378d6e5588fbe4382966395ac8 (diff) | |
| download | linux-edf7b8417834c89d00ef88355ea507b0b0a630ae.tar.bz2 | |
rcutorture: Make object_debug also double call_rcu() heap object
This commit provides a test for call_rcu() printing the allocation address
of a double-freed callback by double-freeing a callback allocated via
kmalloc(). However, this commit does not depend on any other commit.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 007595d4783f..76c838696366 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2782,6 +2782,7 @@ static void rcu_test_debug_objects(void) #ifdef CONFIG_DEBUG_OBJECTS_RCU_HEAD struct rcu_head rh1; struct rcu_head rh2; + struct rcu_head *rhp = kmalloc(sizeof(*rhp), GFP_KERNEL); init_rcu_head_on_stack(&rh1); init_rcu_head_on_stack(&rh2); @@ -2794,6 +2795,10 @@ static void rcu_test_debug_objects(void) local_irq_disable(); /* Make it harder to start a new grace period. */ call_rcu(&rh2, rcu_torture_leak_cb); call_rcu(&rh2, rcu_torture_err_cb); /* Duplicate callback. */ + if (rhp) { + call_rcu(rhp, rcu_torture_leak_cb); + call_rcu(rhp, rcu_torture_err_cb); /* Another duplicate callback. */ + } local_irq_enable(); rcu_read_unlock(); preempt_enable(); |