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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 524EFC433F5 for ; Sun, 23 Jan 2022 16:10:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234269AbiAWQKr (ORCPT ); Sun, 23 Jan 2022 11:10:47 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:43204 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232971AbiAWQKr (ORCPT ); Sun, 23 Jan 2022 11:10:47 -0500 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 638F4B80D3B for ; Sun, 23 Jan 2022 16:10:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A1771C340E8; Sun, 23 Jan 2022 16:10:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1642954245; bh=5iMQ8G4LXWECoKUBiq3FCjVBypJTuYlgnVxysdRZjD4=; h=Subject:To:Cc:From:Date:From; b=liro9a5gt0vNXLe8xMF1zRTnsRmiQLucSYKEsaGcj1xsv/Z7EpFh5bnYZ3tcyuutD aT99GoTHtoLpPbbeRKDcyr8CjdZmYrxznO+Fltu+4sT+/7xXTIvPReYvvHcbjOWEEz zCs6M8BxJPWxazh3LAQOUkdyB0BDDjKrH8zeMPAg= Subject: FAILED: patch "[PATCH] crypto: stm32/crc32 - Fix kernel BUG triggered in probe()" failed to apply to 4.19-stable tree To: marex@denx.de, alexandre.torgue@foss.st.com, fabien.dessenne@st.com, herbert@gondor.apana.org.au, lionel.debieve@st.com, nicolas.toromanoff@foss.st.com, nicolas.toromanoff@st.com, stable@vger.kernel.org Cc: From: Date: Sun, 23 Jan 2022 17:10:41 +0100 Message-ID: <16429542415161@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 29009604ad4e3ef784fd9b9fef6f23610ddf633d Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Mon, 20 Dec 2021 20:50:22 +0100 Subject: [PATCH] crypto: stm32/crc32 - Fix kernel BUG triggered in probe() 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 diff --git a/drivers/crypto/stm32/stm32-crc32.c b/drivers/crypto/stm32/stm32-crc32.c index 75867c0b0017..be1bf39a317d 100644 --- a/drivers/crypto/stm32/stm32-crc32.c +++ b/drivers/crypto/stm32/stm32-crc32.c @@ -279,7 +279,7 @@ 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, @@ -301,7 +301,7 @@ 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,