From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from abb.hmeau.com (abb.hmeau.com [180.181.231.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DCBF23876CA; Fri, 23 Jan 2026 02:52:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=180.181.231.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769136768; cv=none; b=k2rIcvI6BSpzWartYSNCqnHfPkHdidrycd05fZXKTKDQCkN8MJlxFvWxKsT+JILPRd1FTNRHAL0Svr6SvEEJ3ApRUAOGt5ukijikhvR+Sa2lx7joAsMD39EiT4vutvcZbjQkafbTzK7bsCyG0y5JxYeC7Ik3BNHTOxb93u80If0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769136768; c=relaxed/simple; bh=rKk57+D1T3OLqDJOkI0wsJUgXxgmIky4NafnvfrZpV4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=mDaIufknJX4FHqJtRPpywgmVA+U+50IAluvWEum9pyFyYWYPX/tARF0KBImWAIM2xk+q78F6M9Kv2CrDqpcPl80jFDuUeAyNt9rv8wXSKg5P4T3yU0/Dws2bExXm85AAehUkHiUIlHljIfZ14sRlwmW4IOgO6l0/qXNJXiLyEtc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gondor.apana.org.au; spf=pass smtp.mailfrom=gondor.apana.org.au; dkim=pass (2048-bit key) header.d=gondor.apana.org.au header.i=@gondor.apana.org.au header.b=L1gz2i/f; arc=none smtp.client-ip=180.181.231.80 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gondor.apana.org.au Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gondor.apana.org.au Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gondor.apana.org.au header.i=@gondor.apana.org.au header.b="L1gz2i/f" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gondor.apana.org.au; s=h01; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:cc:to:subject:message-id:date: from:content-type:reply-to; bh=tObez+5s71Z2gxNgv1mMH01LClCRKZJiAJOxZNbpZ2Q=; b=L1gz2i/fu4NupHBb4GMv+FTER9r6+Q3wgckF88JpV+kqzOzIv3wMyw1Rp3AmqqS//6q81LV48UX lVGr1uyWlFUas7DAhH+vosZA2YC9hq/RsQ6q/IxlmZkqaZiytAEGjy7P45/hjbTZ6+NVFg+TY1wOY /HqqTt3Z3yAotqMyJJAPl5zadj/9oaqLJyuj5KUmPqHhhhIQLBLndHqCFKbhZOs2N0exJCXxt+eeX BcUcIrV9TN9tZiLMj01SieqWKVAmehvclAmGJw1pVh1LyQgqKK5tMMMk/d01fdzh9h3QQZJvRnvJU Tza6T4G9pPHDsTW91XTup8H+TtNo54b41YSg==; Received: from loth.rohan.me.apana.org.au ([192.168.167.2]) by formenos.hmeau.com with smtp (Exim 4.96 #2 (Debian)) id 1vj7HV-001Tgs-2H; Fri, 23 Jan 2026 10:52:18 +0800 Received: by loth.rohan.me.apana.org.au (sSMTP sendmail emulation); Fri, 23 Jan 2026 10:52:17 +0800 Date: Fri, 23 Jan 2026 10:52:17 +0800 From: Herbert Xu To: Lianjie Wang Cc: Olivia Mackall , David Laight , Jonathan McDowell , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] hwrng: core - fix racing condition when stopping hwrng_fill Message-ID: References: <20251221122448.246531-1-karin0.zst@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251221122448.246531-1-karin0.zst@gmail.com> On Sun, Dec 21, 2025 at 09:24:48PM +0900, Lianjie Wang wrote: > > Besides, if the hwrng_unregister() call happens immediately after a > hwrng_register() before, the stopped thread may have never been running, How can this happen? Surely that would mean that the kthread_* API is broken? Thanks, -- Email: Herbert Xu Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt