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=1794531027; b=0aFR11n+EwM6ZhLzBCGMMSLwMsqbjIFEEcwOc6CgJMITbQ4dXDh7W5IujqFev4fOnFfp Lqk4nxYuvDoGCaxfl8/tVeCnYbeISFi+aAzCn5riaVWZ0MV6/McnHR96ZFLyR89rTvok2 j6RqBq3rnETDigLeFjQB16bhcb+iY8wdGTnzvPPSd01CTPoSw9YPpewDYQplvRCWziJNJ LJ5CB8DLKZnUdI+ofImQBfmbS0QvaWUsm5jBhfBfV4cSmEA/AAAklKWKHjKWvaDU7/mvF ivWBX6BMbUCs4EME0GThsBCMfaVL0uqkck/zp72pOsvc2jbOkCZx+ZKrfLUQVwet+lw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794531027; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=bVS7FfdBd8pmcqa7/Yd2XypJEkh8XCVghodHDCm8VFY=; b=EX04j/CCrtbhg7r67VUKrJ12+7gQiOSFTKd0b2r4hRypNvuzgTCo1M+xcaTzG9HE3ngB 6tHt48XhUzFaulH2OChSoZy6A9UKQwzDMEcI/4u5x85d5D8ZQ2N/EuEUVbOCEf1E6Q7O0 hUKL7CmNzdu27ylRk854Fga+sGByk+OQbyAiWfKU4gN8v3w87sJ5S8PNf8Mw50pdlsg8v bP5zhp9drkfUVlDHYkyCyddQWhW1XR6h/N/ycxDlsiNp+fBaOpZkUfzbS0NIvTjzuQxBx p6lWCzQKi7hDsuNnpvgBgQ8NYNg3TiUmhvDpj0augHCsaAz8oQp3nSxDRzcxvDcuU5A== 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=Zd1b8EIr; 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 2C84A60A2633; Fri, 13 Nov 2026 00:50:27 +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=Zd1b8EIr Received: by smtp.kernel.org (Postfix) with UTF8SMTPSA id B2B501F000C7; Fri, 13 Nov 2026 00:50:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794531027; bh=bVS7FfdBd8pmcqa7/Yd2XypJEkh8XCVghodHDCm8VFY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Zd1b8EIr9G25B2SmPDUSzJPOciA/B5YOyL2P2ekBx5vuSBz33DxsPvSMHqp0u9WHP xkLSVpPwdJWi56bbCB4dcPQd9j34wL8a1VlMEGurKjC2+F5UmWz7BerdTijNa2H6Wk wP8jtmZTaBthDnQiMDMf88/9OVellpI2xJla3SdHEMc9afp8iHYOphQz9xHQRzbXT7 MmImNDM1CTik/ActWRll4FtEt4YEg7pcRvaDxbgZaXKaR++sDNxNVVEc/tXRWAmXK5 8vaIXQLKk+9u7GIBF+C1RZR1TlLk5+OUAQtUnleqBuJ5J7TXVl5S24XlvKrCqQsyDu tBfR7Ioesxg/g== 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 Cc: rcu@vger.kernel.org, Kunwu Chan , Kunwu Chan Subject: [PATCH for-v7.5 04/11] rcu: Record callback registration stack for Tiny RCU Date: Thu, 12 Nov 2026 19:50:06 -0500 Message-ID: <20261113005017.2772440-5-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_rcu() for KASAN diagnostics involving Tiny RCU callbacks. Suggested-by: Zqiang Signed-off-by: Kunwu Chan Reviewed-by: Joel Fernandes Signed-off-by: Joel Fernandes --- kernel/rcu/tiny.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/rcu/tiny.c b/kernel/rcu/tiny.c index 656b6a682e31..bd22fa43108d 100644 --- a/kernel/rcu/tiny.c +++ b/kernel/rcu/tiny.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -251,6 +252,9 @@ EXPORT_SYMBOL_GPL(synchronize_rcu); */ void call_rcu(struct rcu_head *head, rcu_callback_t func) { + /* Record the caller: the irq_work's stack says nothing about it. */ + kasan_record_aux_stack(head); + if (should_rcu_defer()) { call_rcu_defer(head, func); return; -- 2.54.0