From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794531025; b=s/7XKVqdkeAmmLwK0fW/P0b0dtZnhZ/TOsTFy5ZdFAHXacUaXd7kmu1l1QXXEqEMJqP3 fKnF9hCg0QCUiHZXUATuOkVPEGDqrVrsfEtyF220nu3XtOWxfhVOBIpVbQhXivGKKYCW0 LV1Zqi2escUvqaqRw0fwSVqq8Yxi6G8qFN5ENfxGO8BKn3rbm/c1ZDqGXlbft7TJSHIKp KmWf0cOvbO7Cgzcxnc4fIPB0iyGBRwjrf9osyor4Drb3ZAmDsUedcsRetlNAE5vNAh3m+ mRLhgxw9t92jG+YjlvWlEk85ixAiXwUOF3KTlOYJ/LDhs6DU319Ma/rtAgoxbij4zHg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794531025; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=EpgHwwGxo0zu70lC+rlu57ZqhLzVLDmrr8+ivWlIrBI=; b=e8+wY+AFtvXzxg7Cqv9xPKF8j5VopEWz3B0JuTqExmlVlL6EsGy/Xu8OyszJvScNzvaN NxUPWurMBHFFYxRjAyE67oMjL1avk3zXeMcI9aCOcgYw7vKcpboUmKkf0f9exEu+IQbGA VMirVM9WKmGaTuM1G+WhlgY7qKYALmCXgCHzp09fvLlIFTbhd2s5MSXfa9k/DGAwgojvJ 74H7EJy98tdVt2QNYU6Fsh0yDFcvOjQvpb67sJdy6R7JmbZCiFOmjMjAaCDngtlUNlvwH krzAW+AW93RJ3KLN9cDY6MJ6dC4M+S/IDy/djCZeWg0EBNOtWgXBBM/iHtlQSB1/JrA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=c7icf2Bp; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with UTF8SMTPS id 8B57860A2626; Fri, 13 Nov 2026 00:50:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=c7icf2Bp Received: by smtp.kernel.org (Postfix) with UTF8SMTPSA id D6D961F000C6; Fri, 13 Nov 2026 00:50:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794531025; bh=EpgHwwGxo0zu70lC+rlu57ZqhLzVLDmrr8+ivWlIrBI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=c7icf2BpiB8aYx5cWjMRV74ie7L/lwBq70y/C5dCYtf0iHkq11eV0xrBQmfz9wPYC R594hdFFLhU5wSeKoud4Fitjj8yJTVY4PHEvKl6XAnOyjJI1kXpnXt42U1TDHele83 PPdaRWbjJ2KLENBTYs7DaQZK0IpNKwbm7y+nm89hGcvhxq0q8d2yGPef7YSgEh/Aa+ 18Ej8QueSc5PHirfFycYI+5ENobr8AiWz051wxoRtfN7aL6OlfHaIZyOdFopQ97be0 9mFBL6E4BlhqFM40fk2zD/J9lNiYmSLTOhPnHM84jAvMiabYOv2iyVg992HJGuVbir piKBmH2AU8BhQ== From: Joel Fernandes To: linux-kernel@vger.kernel.org, "Paul E . McKenney" , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , =?UTF-8?q?Onur=20=C3=96zkan?= Cc: rcu@vger.kernel.org, Kunwu Chan , Kunwu Chan Subject: [PATCH for-v7.5 03/11] srcutiny: Record callback registration stack for KASAN Date: Thu, 12 Nov 2026 19:50:05 -0500 Message-ID: <20261113005017.2772440-4-jfern@kernel.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20261113005017.2772440-1-jfern@kernel.org> References: <20261113005017.2772440-1-jfern@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Kunwu Chan Record the callback registration stack in call_srcu() for KASAN diagnostics involving Tiny SRCU callbacks. Suggested-by: Zqiang Signed-off-by: Kunwu Chan Reviewed-by: Joel Fernandes Signed-off-by: Joel Fernandes --- kernel/rcu/srcutiny.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/rcu/srcutiny.c b/kernel/rcu/srcutiny.c index 63a3f0a8bc53..3ee28885b96f 100644 --- a/kernel/rcu/srcutiny.c +++ b/kernel/rcu/srcutiny.c @@ -10,6 +10,7 @@ #include #include +#include #include #include #include @@ -290,6 +291,9 @@ EXPORT_SYMBOL_GPL(srcu_defer_drain); void call_srcu(struct srcu_struct *ssp, struct rcu_head *rhp, rcu_callback_t func) { + /* Record the caller: the irq_work's stack says nothing about it. */ + kasan_record_aux_stack(rhp); + if (should_rcu_defer()) { /* A re-entrant call_srcu() during the drain would livelock it. */ if (READ_ONCE(srcu_defer_draining) && !in_nmi()) { -- 2.54.0