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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A14F8C7618F for ; Mon, 15 Jul 2019 14:59:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5AF32205ED for ; Mon, 15 Jul 2019 14:59:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202752; bh=2NdhQFS1az4dd2S3kTrgJNxWZQrj5AM2wmdh1NW6SPA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=SwDpWgRRezSVgTSRTpdcocD+6yEOVNq3EGmO3jmEY5WKpytoM5oDSj+ty9rMLtIWr sl3jV/KfaUU8GndAQSxFp5IA+vBhN59hTb/9y0pPi+BY3++fvv9dhmzGdGHixhood9 1RP/hrDRyMRu59clWgqtteWQlumyvvcnSiSv2pjY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390290AbfGOO7L (ORCPT ); Mon, 15 Jul 2019 10:59:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:40756 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390075AbfGOOTU (ORCPT ); Mon, 15 Jul 2019 10:19:20 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E85E320651; Mon, 15 Jul 2019 14:19:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563200360; bh=2NdhQFS1az4dd2S3kTrgJNxWZQrj5AM2wmdh1NW6SPA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jRYZVgiq3U8CK3TNWZhiM7EDw4vy8Tmw/J1jIod6Vbi9if8TcLvrWyGMw857kuV5p tpxyW0LGsrbHCsKhKUuiOtRSd2OAGsAByIVtIjU79ithfw2Kb7i4Y2WTxap2TCxVvo X38eI4jcjxpPu+JK0KlLwmjOVw5MtgypBvhaLkr8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eric Biggers , Chandan Rajendra , Sasha Levin , linux-fscrypt@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 025/158] fscrypt: clean up some BUG_ON()s in block encryption/decryption Date: Mon, 15 Jul 2019 10:15:56 -0400 Message-Id: <20190715141809.8445-25-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715141809.8445-1-sashal@kernel.org> References: <20190715141809.8445-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Biggers [ Upstream commit eeacfdc68a104967162dfcba60f53f6f5b62a334 ] Replace some BUG_ON()s with WARN_ON_ONCE() and returning an error code, and move the check for len divisible by FS_CRYPTO_BLOCK_SIZE into fscrypt_crypt_block() so that it's done for both encryption and decryption, not just encryption. Reviewed-by: Chandan Rajendra Signed-off-by: Eric Biggers Signed-off-by: Sasha Levin --- fs/crypto/crypto.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c index 0f46cf550907..c83ddff3ff4a 100644 --- a/fs/crypto/crypto.c +++ b/fs/crypto/crypto.c @@ -149,7 +149,10 @@ int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw, struct crypto_skcipher *tfm = ci->ci_ctfm; int res = 0; - BUG_ON(len == 0); + if (WARN_ON_ONCE(len <= 0)) + return -EINVAL; + if (WARN_ON_ONCE(len % FS_CRYPTO_BLOCK_SIZE != 0)) + return -EINVAL; BUILD_BUG_ON(sizeof(iv) != FS_IV_SIZE); BUILD_BUG_ON(AES_BLOCK_SIZE != FS_IV_SIZE); @@ -241,8 +244,6 @@ struct page *fscrypt_encrypt_page(const struct inode *inode, struct page *ciphertext_page = page; int err; - BUG_ON(len % FS_CRYPTO_BLOCK_SIZE != 0); - if (inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES) { /* with inplace-encryption we just encrypt the page */ err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk_num, page, @@ -254,7 +255,8 @@ struct page *fscrypt_encrypt_page(const struct inode *inode, return ciphertext_page; } - BUG_ON(!PageLocked(page)); + if (WARN_ON_ONCE(!PageLocked(page))) + return ERR_PTR(-EINVAL); ctx = fscrypt_get_ctx(inode, gfp_flags); if (IS_ERR(ctx)) @@ -302,8 +304,9 @@ EXPORT_SYMBOL(fscrypt_encrypt_page); int fscrypt_decrypt_page(const struct inode *inode, struct page *page, unsigned int len, unsigned int offs, u64 lblk_num) { - if (!(inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES)) - BUG_ON(!PageLocked(page)); + if (WARN_ON_ONCE(!PageLocked(page) && + !(inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES))) + return -EINVAL; return fscrypt_do_page_crypto(inode, FS_DECRYPT, lblk_num, page, page, len, offs, GFP_NOFS); -- 2.20.1