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=-17.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 A0C1FC11F68 for ; Fri, 2 Jul 2021 06:56:01 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 64C9861410 for ; Fri, 2 Jul 2021 06:56:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 64C9861410 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org 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=Q9qZ3wL8DdxBKnJ+dh8+HjPek1mhX3Fsf9yU6KHK8r4=; b=EMkkeT4rbLgL96 PhfNb5ZlkeJ4KQ50GuM5WBRRHVH19a/Rij1ZQ+BnFAr6b+G4picBVSd6CW7uZiXoyaY/PNZStUOXx dS1vEbC0JrOQdDYJJ1pj9lwWg3nvD5rxumkDLSx6/V6BNp7E9QfrO7tQXCP6b8bcjSRW2k8PR3OPJ QMSUR6Ld2tLjIWWRp+r28P8wwJ1Q2qTyvinBJ30/XorYvAiNK0Srv1AxBH/benZND/kXSEvb1i3hj 2b+bf5zzHRBJr0CGMWUrfKXk366Kjht6QdqPZOW+ls0YDu+CKUzIuHv70jry+/Y4JoOQP0yxSiRJ3 TXRRQKjHeGetiFEr8d1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lzD5E-002J5i-8l; Fri, 02 Jul 2021 06:55:28 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lzD4e-002Irx-2z for linux-mtd@lists.infradead.org; Fri, 02 Jul 2021 06:54:54 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id A419F61416; Fri, 2 Jul 2021 06:54:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625208891; bh=8UwGI3mTEOy+/FNQC2YBcGZZYXAkamywQ/BEcm9u/PU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bn/fBOYp3M8tUVY2Ebpw1Q47/lWTLSOQ+UWnSo+oVj4xZO7jBEZ9Wu1cyV6oLrjB1 wuoEQ5TLRZ86nsoPIVZ+f7ip9+en17J39v+pGwJ9AOrJvlph0XvJSUgm6jwHyedRM2 HOQZkcuz29/kb7XRvZaLkLymKDYI4oVQzAKIOR0oLqgRVzDXqRrwhuyOz/bKcmIz/4 4OzQppuvSS+8tjlf9zZHd3bKnqTo3MpfQghXb1m/rXOfUPfbkqzO+ZTYAhOLjdYwqF ImwrigtKqh+S4TycOXhqEoX7+Qk7TgnvEEDzz/R7PaCMN/43fJOnvplzZkz6Ts8Wnf MSx1YWjnRsnAQ== From: Eric Biggers To: linux-fscrypt@vger.kernel.org Cc: linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org, linux-fsdevel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH 4/5] ubifs: report correct st_size for encrypted symlinks Date: Thu, 1 Jul 2021 23:53:49 -0700 Message-Id: <20210702065350.209646-5-ebiggers@kernel.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210702065350.209646-1-ebiggers@kernel.org> References: <20210702065350.209646-1-ebiggers@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210701_235452_182438_6AFBDA2A X-CRM114-Status: GOOD ( 12.41 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org From: Eric Biggers The stat() family of syscalls report the wrong size for encrypted symlinks, which has caused breakage in several userspace programs. Fix this by calling fscrypt_symlink_getattr() after ubifs_getattr() for encrypted symlinks. This function computes the correct size by reading and decrypting the symlink target (if it's not already cached). For more details, see the commit which added fscrypt_symlink_getattr(). Fixes: ca7f85be8d6c ("ubifs: Add support for encrypted symlinks") Cc: stable@vger.kernel.org Signed-off-by: Eric Biggers --- fs/ubifs/file.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index 2e4e1d159969..5cfa28cd00cd 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -1630,6 +1630,17 @@ static const char *ubifs_get_link(struct dentry *dentry, return fscrypt_get_symlink(inode, ui->data, ui->data_len, done); } +static int ubifs_symlink_getattr(struct user_namespace *mnt_userns, + const struct path *path, struct kstat *stat, + u32 request_mask, unsigned int query_flags) +{ + ubifs_getattr(mnt_userns, path, stat, request_mask, query_flags); + + if (IS_ENCRYPTED(d_inode(path->dentry))) + return fscrypt_symlink_getattr(path, stat); + return 0; +} + const struct address_space_operations ubifs_file_address_operations = { .readpage = ubifs_readpage, .writepage = ubifs_writepage, @@ -1655,7 +1666,7 @@ const struct inode_operations ubifs_file_inode_operations = { const struct inode_operations ubifs_symlink_inode_operations = { .get_link = ubifs_get_link, .setattr = ubifs_setattr, - .getattr = ubifs_getattr, + .getattr = ubifs_symlink_getattr, .listxattr = ubifs_listxattr, .update_time = ubifs_update_time, }; -- 2.32.0 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/