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 02A612FDC22; Tue, 12 Aug 2025 17:38:17 +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=1755020297; cv=none; b=U97xwHNHbYBjWLFs13y8wnawkMuLI0h9tLBh7NLksDrzpE27zUj71+MmFAEBmtZXSVnWx4TiK6Qomqqs5Y6YVKnU03D9Q1uqQq3+Ha1aEdMm9398bdryBVd6N783XQa2u9bHcLi2UUz7E6r50/cJ8WGs3BbzYmP20QVqDSI+q/s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755020297; c=relaxed/simple; bh=MmTHG47pQWcOw+JEe34u2+lr+AlUQ+9dkRbFyO25Q28=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JzJO8abFJgCuUcI6HCL9lIH0fQX1XbgS0rB+SDuQzyledcnPM6z1eiLslGVbd8/GhQgzUo63U741LHWw+hyR+d/k9TvhVIHJ3VqgDSHMnBHLxZaaO2qcQST8OrQrdGtrLScOszzcOmr5UxSaH1W2aDDLtmoSLX510z7+7ICKCb4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=cBWbNpoJ; 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="cBWbNpoJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 803BEC4CEF0; Tue, 12 Aug 2025 17:38:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755020296; bh=MmTHG47pQWcOw+JEe34u2+lr+AlUQ+9dkRbFyO25Q28=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cBWbNpoJkmqNscDAH6BKuPN5bNKiJbc/wEYjnDVFC2+3cFMcqnULcxfHjXg2ZjBUL OM6U4bN+gM9CqzAlab0zRBt/eNf9NM4EIEfU05hz8Z07DBh6NzsjBk/Y1lIREt5cye FWrFyRNd8ZH5iQGpK7AhpRYCusUFjALXInx7f11I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ryusuke Konishi , syzbot+895c23f6917da440ed0d@syzkaller.appspotmail.com, Andrew Morton Subject: [PATCH 6.1 039/253] nilfs2: reject invalid file types when reading inodes Date: Tue, 12 Aug 2025 19:27:07 +0200 Message-ID: <20250812172950.397608689@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250812172948.675299901@linuxfoundation.org> References: <20250812172948.675299901@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Ryusuke Konishi commit 4aead50caf67e01020c8be1945c3201e8a972a27 upstream. To prevent inodes with invalid file types from tripping through the vfs and causing malfunctions or assertion failures, add a missing sanity check when reading an inode from a block device. If the file type is not valid, treat it as a filesystem error. Link: https://lkml.kernel.org/r/20250710134952.29862-1-konishi.ryusuke@gmail.com Fixes: 05fe58fdc10d ("nilfs2: inode operations") Signed-off-by: Ryusuke Konishi Reported-by: syzbot+895c23f6917da440ed0d@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/nilfs2/inode.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/fs/nilfs2/inode.c +++ b/fs/nilfs2/inode.c @@ -517,11 +517,18 @@ static int __nilfs_read_inode(struct sup inode->i_op = &nilfs_symlink_inode_operations; inode_nohighmem(inode); inode->i_mapping->a_ops = &nilfs_aops; - } else { + } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || + S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { inode->i_op = &nilfs_special_inode_operations; init_special_inode( inode, inode->i_mode, huge_decode_dev(le64_to_cpu(raw_inode->i_device_code))); + } else { + nilfs_error(sb, + "invalid file type bits in mode 0%o for inode %lu", + inode->i_mode, ino); + err = -EIO; + goto failed_unmap; } nilfs_ifile_unmap_inode(root->ifile, ino, bh); brelse(bh);