Messages in this thread Patch in this message | | | From | paulmck@kernel ... | Subject | [PATCH tip/core/rcu 1/3] rcu: Record kvfree_call_rcu() call stack for KASAN | Date | Tue, 5 Jan 2021 17:01:23 -0800 |
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From: Zqiang <qiang.zhang@windriver.com>
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> --- kernel/rcu/tree.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 40e5e3d..2db736c 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3498,6 +3498,7 @@ 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); -- 2.9.5
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