The following commit has been merged into the core/rcu branch of tip: Commit-ID: 84109ab58590dc6c4e7eb36329fdc7ec121ed5a5 Gitweb: https://git.kernel.org/tip/84109ab58590dc6c4e7eb36329fdc7ec121ed5a5 Author: Zqiang <[email protected]> AuthorDate: Fri, 20 Nov 2020 06:53:11 -08:00 Committer: Paul E. McKenney <[email protected]> CommitterDate: Mon, 04 Jan 2021 13:42:04 -08:00
rcu: Record kvfree_call_rcu() call stack for KASAN 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 <[email protected]> Reviewed-by: Uladzislau Rezki (Sony) <[email protected]> Signed-off-by: Zqiang <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> --- 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);
