From patchwork Mon Jan 24 18:44:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 12722838 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ABDE0C433F5 for ; Mon, 24 Jan 2022 19:24:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=P7INX3nsG9p07WWidVsEPwDoiWWd4e9GkSoLq4eTSNc=; b=UdwotPdtj79DAT z/ITskddyv3dOoBlXBOlrJ9r2nc0oBNVA8ZBnSBy9wrELRRGW/CRs5OKAsIaAI3EsdfCr+BkWjTEa Y0eV4Fic0YpniivmUomw47fj/rXxnqXExSQsGu0VKXZN9GuhtcW3BMaFdjrsoSQpSShgy1faFEAfQ 9On4Imn0TXqU5gyimwV0FPw+d92Q50R4n2QBg0r2Re/G+Z0kkYS/mbX+1kFtY9eFvYvyxMaFOrUBN dHtpFpT5LiDbR7Is4OeAT9FrcEL10r1IHC55mGi4VC1v8ZMTfxOoSBVNh1WfIywCn4L9R5rde4wLh luMPHF2afH4WARysIAtg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nC4vX-004sDo-Mx; Mon, 24 Jan 2022 19:22:57 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nC4vK-004s9E-6D for linux-arm-kernel@lists.infradead.org; Mon, 24 Jan 2022 19:22:44 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A85B7B81247; Mon, 24 Jan 2022 19:22:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CBBEBC340E8; Mon, 24 Jan 2022 19:22:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643052160; bh=T4/i0YuXX/RMcyoaCx/hrRoyWRKFKPUqGz9imKlq18w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RRbOcHXKXtDrWbwlXI3Ua5jakU8m74I/qmEPlu/m/X5WWFU0+5hdAgz/FsilPlU4c 9epGAVvKpjLmdTkIa/62ApY0scJYkuZ3rPLa2leoq/faic9f/0n8Ke+/3T/Aehu4gn PEu2Xbdz5yLeQvBKC4posgKZw/VRGNKdo6tO/MHI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marek Vasut , Alexandre Torgue , Fabien Dessenne , Herbert Xu , Lionel Debieve , Nicolas Toromanoff , linux-arm-kernel@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, Nicolas Toromanoff Subject: [PATCH 4.19 207/239] crypto: stm32/crc32 - Fix kernel BUG triggered in probe() Date: Mon, 24 Jan 2022 19:44:05 +0100 Message-Id: <20220124183949.688480674@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183943.102762895@linuxfoundation.org> References: <20220124183943.102762895@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220124_112242_562986_159CB9AE X-CRM114-Status: GOOD ( 15.59 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Marek Vasut commit 29009604ad4e3ef784fd9b9fef6f23610ddf633d upstream. The include/linux/crypto.h struct crypto_alg field cra_driver_name description states "Unique name of the transformation provider. " ... " this contains the name of the chip or provider and the name of the transformation algorithm." In case of the stm32-crc driver, field cra_driver_name is identical for all registered transformation providers and set to the name of the driver itself, which is incorrect. This patch fixes it by assigning a unique cra_driver_name to each registered transformation provider. The kernel crash is triggered when the driver calls crypto_register_shashes() which calls crypto_register_shash(), which calls crypto_register_alg(), which calls __crypto_register_alg(), which returns -EEXIST, which is propagated back through this call chain. Upon -EEXIST from crypto_register_shash(), the crypto_register_shashes() starts unregistering the providers back, and calls crypto_unregister_shash(), which calls crypto_unregister_alg(), and this is where the BUG() triggers due to incorrect cra_refcnt. Fixes: b51dbe90912a ("crypto: stm32 - Support for STM32 CRC32 crypto module") Signed-off-by: Marek Vasut Cc: # 4.12+ Cc: Alexandre Torgue Cc: Fabien Dessenne Cc: Herbert Xu Cc: Lionel Debieve Cc: Nicolas Toromanoff Cc: linux-arm-kernel@lists.infradead.org Cc: linux-stm32@st-md-mailman.stormreply.com To: linux-crypto@vger.kernel.org Acked-by: Nicolas Toromanoff Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/stm32/stm32_crc32.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/crypto/stm32/stm32_crc32.c +++ b/drivers/crypto/stm32/stm32_crc32.c @@ -230,7 +230,7 @@ static struct shash_alg algs[] = { .digestsize = CHKSUM_DIGEST_SIZE, .base = { .cra_name = "crc32", - .cra_driver_name = DRIVER_NAME, + .cra_driver_name = "stm32-crc32-crc32", .cra_priority = 200, .cra_flags = CRYPTO_ALG_OPTIONAL_KEY, .cra_blocksize = CHKSUM_BLOCK_SIZE, @@ -252,7 +252,7 @@ static struct shash_alg algs[] = { .digestsize = CHKSUM_DIGEST_SIZE, .base = { .cra_name = "crc32c", - .cra_driver_name = DRIVER_NAME, + .cra_driver_name = "stm32-crc32-crc32c", .cra_priority = 200, .cra_flags = CRYPTO_ALG_OPTIONAL_KEY, .cra_blocksize = CHKSUM_BLOCK_SIZE,