From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A3E2C433E6 for ; Wed, 6 Jan 2021 01:02:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4585222838 for ; Wed, 6 Jan 2021 01:02:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725991AbhAFBCH (ORCPT ); Tue, 5 Jan 2021 20:02:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:57048 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725925AbhAFBCH (ORCPT ); Tue, 5 Jan 2021 20:02:07 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0515F229EF; Wed, 6 Jan 2021 01:01:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1609894887; bh=8sZUhRn5VAPTai1bqjNuP3yhkMzMUu3vrGnDlahpHQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fLs0SvBN8Li/Z0JxNHB08CuhSfludlrsqeExaOuxDweXxe1XkcjY3mB/8OiHg16BR tfmj1TdF/JDKJh4Tct+6DzJyCe65FNE1AHLuFlzJEKACNTPj2//0m92qja6/oQmTze /wNhfYU8oTG0z//hJyGMLFKWbfKP9Ir4nReqlKJDC4wVXWTI6pt/mSKCL4x9rn5OLd ekFcNHaK9M1ZcYPDK8h3i8GiM9y9frHvUxwr0Mpzv4lTKYYtvbn7NkstGd9CxkWwhi 6m86wFv8ZzwyNGnCKP6xlqtPbrH/fRjzuJoFSWJfqazFrZszgwI35XTUh0OP5PjY9D VBjjOO56tOA3Q== From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, Zqiang , "Paul E . McKenney" 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 Message-Id: <20210106010125.12802-1-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20210106010102.GA12737@paulmck-ThinkPad-P72> References: <20210106010102.GA12737@paulmck-ThinkPad-P72> Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org From: Zqiang 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 Reviewed-by: Uladzislau Rezki (Sony) Signed-off-by: Zqiang Signed-off-by: Paul E. McKenney --- 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