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UPSTREAM: 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>
(cherry picked from commit 84109ab585)
Bug: 217222520
Change-Id: Ia7c27babe4b2318ab116b508578c17e8967e70b1
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
This commit is contained in:
Zqiang
2020-11-20 06:53:11 -08:00
committed by Andrey Konovalov
parent 6d6288c745
commit adebe26902
1 changed files with 1 additions and 0 deletions
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1
kernel/rcu/tree.c
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@@ -3497,6 +3497,7 @@ void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
goto unlock_return;
}
kasan_record_aux_stack(ptr);
success = kvfree_call_rcu_add_ptr_to_bulk(krcp, ptr);
if (!success) {
run_page_cache_worker(krcp);