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,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 DAE91C433F5 for ; Wed, 8 Sep 2021 21:52:44 +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 AAD8E60FDA for ; Wed, 8 Sep 2021 21:52:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org AAD8E60FDA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=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=geh+Y+rYNw2ruMABcX1QOVp2ImJk/VNlbaIDuUfqhPk=; b=39xieq7MThgX3F MzognsuawXoAols0y02zRok5IO/cy3qYWQOJ4C0u/g/8uybXyT4bJuTHdDGv9HkAfFR4QPQ3OnxhX EHZomEKPw8glAe2p/fIoQdLMy/CaIrYYnZA0rCPDHUfxmK2hf3NkOgd81j8V+zaI8cukJOQXHCn1W b62UCfMwBHK/SYqG8pFGPiU3qot17vy1Kf0+rVMjWUIIxbm1Is6jLjzro/7kQ3wsXMdXl6kuiBQmB RAalfGYTLoPGuNrrMA6WHEDlojuZyl0GPj8nTAacSSoiUI/4Km96DeBf+U5oMn4i1xYKI5iC75xSL ylTVwYaq0yOBSHYZ4N8A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mO5UL-007e4g-LB; Wed, 08 Sep 2021 21:52:13 +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 1mO5Te-007dwH-7B for linux-mtd@lists.infradead.org; Wed, 08 Sep 2021 21:51:31 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5B4BA60FDA; Wed, 8 Sep 2021 21:51:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1631137889; bh=i6jyH8PvgB9yhUYtCQiIMlEe2F7QGBiOJVd7oI0isaQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uc0ABPV3twDuxLbMd8GxOBFitN/d4dzY/uDlYPFrSwJ2ssdr1If877Acir+VjZZ8n Nt/1rGsencho7jBMorqXtpxbbAGOew+veyR+teonjCszMDWx75NRw2lv/M/1JDvZgE p6ecHZl1/g/3/8zg5mkWJqIhBqONxZnc+NctmDqqVS45hJ+/JP9bsKIhSTIVU4hLJT mC6a5VpUhXm37nyOBu54PPLjy8QaT9GOey4LjQfuAp8Nz0dM8f7Qgw9gHni6eqO2Hr br4oThTq/jK3hdSY3kuxtu/Qxx8lyhEc545uStdAaEsUArmfAqD5pOq6M2Ok1P+Rq6 Y/EuKsKzzo1Ug== From: Eric Biggers To: stable@vger.kernel.org Cc: linux-fscrypt@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-mtd@lists.infradead.org Subject: [PATCH 3/4] f2fs: report correct st_size for encrypted symlinks Date: Wed, 8 Sep 2021 14:50:32 -0700 Message-Id: <20210908215033.1122580-4-ebiggers@kernel.org> X-Mailer: git-send-email 2.33.0.153.gba50c8fa24-goog In-Reply-To: <20210908215033.1122580-1-ebiggers@kernel.org> References: <20210908215033.1122580-1-ebiggers@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210908_145130_349133_E01E4DFE X-CRM114-Status: GOOD ( 10.82 ) 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 commit 461b43a8f92e68e96c4424b31e15f2b35f1bbfa9 upstream. 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 f2fs_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: cbaf042a3cc6 ("f2fs crypto: add symlink encryption") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20210702065350.209646-4-ebiggers@kernel.org Signed-off-by: Eric Biggers --- fs/f2fs/namei.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index e20a0f9e6845..edc80855974a 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -1219,9 +1219,18 @@ static const char *f2fs_encrypted_get_link(struct dentry *dentry, return target; } +static int f2fs_encrypted_symlink_getattr(const struct path *path, + struct kstat *stat, u32 request_mask, + unsigned int query_flags) +{ + f2fs_getattr(path, stat, request_mask, query_flags); + + return fscrypt_symlink_getattr(path, stat); +} + const struct inode_operations f2fs_encrypted_symlink_inode_operations = { .get_link = f2fs_encrypted_get_link, - .getattr = f2fs_getattr, + .getattr = f2fs_encrypted_symlink_getattr, .setattr = f2fs_setattr, #ifdef CONFIG_F2FS_FS_XATTR .listxattr = f2fs_listxattr, -- 2.33.0.153.gba50c8fa24-goog ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/