From patchwork Thu Mar 16 14:27:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mingyi Cong X-Patchwork-Id: 13177731 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 37E11C6FD1F for ; Thu, 16 Mar 2023 14:28:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230215AbjCPO2U (ORCPT ); Thu, 16 Mar 2023 10:28:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230176AbjCPO2S (ORCPT ); Thu, 16 Mar 2023 10:28:18 -0400 Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E85245FE4; Thu, 16 Mar 2023 07:28:09 -0700 (PDT) Received: by mail-pg1-x543.google.com with SMTP id z10so1024031pgr.8; Thu, 16 Mar 2023 07:28:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678976888; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=M7Aqp/vCsVP1mtxvgQ+j+GMgl/fAIAsqktfz1ENdg3U=; b=ThLnSy636s2ceW+2BuQpxDg3BeyXPAKuTJgyCCKtBdXeM9/rA60FHrK3q8qzAZ+sGK 0Y7T+qNAD/zcDTTVqLM4rGINJjluhEcPbROqkn2O8UkcY7mk+xt40lsfT596q2oP+1+H fwBBuWpmx0hwy7fiMMbwdE6i8Hj22FzaNgECKliQeFll8xRx9zCxSmq82hkHxNOD2jcE JKGxcMOKLdLtSFe+gfuVMjg7DFYTONxCV43Tpo7+ljzrYzPhws490Ue2cpTdNElFFNAi BL2GkX5Ty/t9xNOCEXPot/PJgV4D0vauMLH5/+BB0OvNI+/F2X+Cy1IzNUYX8pxdt9A2 ssJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678976888; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=M7Aqp/vCsVP1mtxvgQ+j+GMgl/fAIAsqktfz1ENdg3U=; b=aomMkPI7wuw8JEcdXTXDndsUPNoCYMcyb9dgg/EpPP76j3TwpKTnYA7RSGIqinZPAP l1l89XHf8SJ75ypaZfIK4iOPupnFy73iOTqiamHVnLMnJclvD+9HkEcxpCJi1EJqqx9O wZ+UjgIqteWj3QBicuM1gbdP2JfTs2ZDPE3cozmQL2n6r8THh/036zplk2VRWN3AysN3 uGw3FwzwaWEkliWmGqyellzm8qVURyDZYw4IJ+aEsu7vrTKDq3cQlzDboz0wiXh+sCrQ Nkmt9TbTCYYz26mKN27Gi3J00hY3h9KKiLFclWpNo484wDrP4c2vbyoLlPZP3aTtMpQS ztrA== X-Gm-Message-State: AO0yUKU8qpYH2xxwH0SGEaR2Ss+3abx5Kj8erII8Qh7umzmosZsEIFyh /HaWxNePNe8wr/p9RoGl5szo9Q5YYvFP2Q== X-Google-Smtp-Source: AK7set+nQjrth2IsI2my79ig6nDTaUEKWSmsDA4k9pvQa+I6uQSjYSrK/+B4jTu383dd6b+/KU4Sng== X-Received: by 2002:aa7:9681:0:b0:624:2f88:927d with SMTP id f1-20020aa79681000000b006242f88927dmr3049632pfk.27.1678976888137; Thu, 16 Mar 2023 07:28:08 -0700 (PDT) Received: from c1ion.lan ([139.227.13.23]) by smtp.gmail.com with ESMTPSA id x21-20020aa784d5000000b0062485a1675bsm5510058pfn.137.2023.03.16.07.28.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Mar 2023 07:28:07 -0700 (PDT) From: MIngyi Cong To: linkinjeon@kernel.org, senozhatsky@chromium.org, sfrench@samba.org, tom@talpey.com Cc: congmingyi@gmail.com, linux-kernel@vger.kernel.org, linux-cifs@vger.kernel.org Subject: [PATCH v3] fs: add the tuncate check of exfat Date: Thu, 16 Mar 2023 22:27:53 +0800 Message-Id: <20230316142753.6628-1-congmingyi@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230307135740.13209-1-congmingyi@gmail.com> References: <20230307135740.13209-1-congmingyi@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org EXFAT will fill zero data in truncated range. Fix this by adding EXFAT_SUPER_MAGIC check. Signed-off-by: MIngyi Cong --- V1 -> V2: add the truncate check of hfs and remove EXFAT_SUPER_MAGIC in magic.h V2 -> V3: remove the truncate check of hfs and hfsplus fs/ksmbd/smb2pdu.c | 3 ++- include/uapi/linux/magic.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 0685c1c77b9f..3f2e34936b8d 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -5746,7 +5746,8 @@ static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, * truncate of some filesystem like FAT32 fill zero data in * truncated range. */ - if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { + if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC || + inode->i_sb->s_magic != EXFAT_SUPER_MAGIC) { ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); rc = ksmbd_vfs_truncate(work, fp, newsize); if (rc) { diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h index 6325d1d0e90f..309cb3b5c5c4 100644 --- a/include/uapi/linux/magic.h +++ b/include/uapi/linux/magic.h @@ -46,6 +46,7 @@ #define MSDOS_SUPER_MAGIC 0x4d44 /* MD */ #define EXFAT_SUPER_MAGIC 0x2011BAB0 +#define HFS_SUPER_MAGIC 0x4244 /* "BD": HFS MDB (super block) */ #define NCP_SUPER_MAGIC 0x564c /* Guess, what 0x564c is :-) */ #define NFS_SUPER_MAGIC 0x6969 #define OCFS2_SUPER_MAGIC 0x7461636f