From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 26FA9F9FD; Sat, 3 Feb 2024 04:09:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706933346; cv=none; b=CyuaIv9KMcQHqlIoUkc00J1TSX6f68UlLDrHdharuFwdBJuYkVWw5pRZkGQ++qTTkGCXzu3y6QzOPdgSpCURA1J4G5bmmHoBKIvaFB/SX7QAF6LWurln6DdPiPP/+mOrRgQzEOgck6683qrRxoBAvG+m1PwbgrVtsisnuSyY66g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706933346; c=relaxed/simple; bh=08rJ0Tw9eGZ03J5bWmAjsogWFmKVXBTvJrFvomZ8ETg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LbPT8erka5dxnU1NBn01ABMCxO0XNXAUHsx+56Y9Q4sOfn+Z02nQajUKyqURsvz38Wnf5EGKAT44+wqsm8H7yiDFVQF6ScXgR0GiSFrS7BKDCyezvj0Dj/PUYG+p+6O+ePu5DKFH3IuUNen5VbbZqgTP0RWXmo3R+G8vEV37nD4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yXQcZF2S; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="yXQcZF2S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2CD0C433F1; Sat, 3 Feb 2024 04:09:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1706933346; bh=08rJ0Tw9eGZ03J5bWmAjsogWFmKVXBTvJrFvomZ8ETg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=yXQcZF2SMopPwPtu2/3Gu0Cr7Pj8St/Ri8HS/74C4aTmlrICzifp+8z+Ur8iXXAyk jHHyngwE9lNsQahriBktj+InQ8WuIyA+QQdnXVQqYikHCZiabmNvrKXRBWSQDmtpls 3GvVeZMfnbzY5CWdkrbRqlE9AhpiiWc8eFDwjGUY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gabriel Krisman Bertazi , Eric Biggers , Sasha Levin Subject: [PATCH 6.1 040/219] ecryptfs: Reject casefold directory inodes Date: Fri, 2 Feb 2024 20:03:33 -0800 Message-ID: <20240203035322.089872313@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240203035317.354186483@linuxfoundation.org> References: <20240203035317.354186483@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gabriel Krisman Bertazi [ Upstream commit cd72c7ef5fed44272272a105b1da22810c91be69 ] Even though it seems to be able to resolve some names of case-insensitive directories, the lack of d_hash and d_compare means we end up with a broken state in the d_cache. Considering it was never a goal to support these two together, and we are preparing to use d_revalidate in case-insensitive filesystems, which would make the combination even more broken, reject any attempt to get a casefolded inode from ecryptfs. Signed-off-by: Gabriel Krisman Bertazi Reviewed-by: Eric Biggers Signed-off-by: Sasha Levin --- fs/ecryptfs/inode.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index c214fe0981bd..55340ac61456 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -76,6 +76,14 @@ static struct inode *__ecryptfs_get_inode(struct inode *lower_inode, if (lower_inode->i_sb != ecryptfs_superblock_to_lower(sb)) return ERR_PTR(-EXDEV); + + /* Reject dealing with casefold directories. */ + if (IS_CASEFOLDED(lower_inode)) { + pr_err_ratelimited("%s: Can't handle casefolded directory.\n", + __func__); + return ERR_PTR(-EREMOTE); + } + if (!igrab(lower_inode)) return ERR_PTR(-ESTALE); inode = iget5_locked(sb, (unsigned long)lower_inode, -- 2.43.0