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rcu: Record kvfree_call_rcu() call stack for KASAN

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This commit adds a call to kasan_record_aux_stack() in kvfree_call_rcu()
in order to record the call stack of the code that caused the object
to be freed.  Please note that this function does not update the
allocated/freed state, which is important because RCU readers might
still be referencing this object.

Acked-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Zqiang 2020-11-20 06:53:11 -08:00 committed by Paul E. McKenney
parent 5c8fe583cc
commit 84109ab585
1 changed files with 1 additions and 0 deletions
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kernel/rcu/tree.c
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@ -3498,6 +3498,7 @@ void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
goto unlock_return; goto unlock_return;
} }
kasan_record_aux_stack(ptr);
success = kvfree_call_rcu_add_ptr_to_bulk(krcp, ptr); success = kvfree_call_rcu_add_ptr_to_bulk(krcp, ptr);
if (!success) { if (!success) {
run_page_cache_worker(krcp); run_page_cache_worker(krcp);