From patchwork Fri Mar 11 10:58:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arseniy Krasnov X-Patchwork-Id: 12777826 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 B296AC433EF for ; Fri, 11 Mar 2022 10:58:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348121AbiCKK74 (ORCPT ); Fri, 11 Mar 2022 05:59:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37758 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346129AbiCKK7y (ORCPT ); Fri, 11 Mar 2022 05:59:54 -0500 Received: from mail.sberdevices.ru (mail.sberdevices.ru [45.89.227.171]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B5A9813C39F; Fri, 11 Mar 2022 02:58:50 -0800 (PST) Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mail.sberdevices.ru (Postfix) with ESMTP id 2683C5FD03; Fri, 11 Mar 2022 13:58:48 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1646996328; bh=WyQa/Gu+vWVCPA15DPgEI2x5TX1alJGD8E5F+CE4TPE=; h=From:To:Subject:Date:Message-ID:Content-Type:MIME-Version; b=LWFMqCacZCmAYwL9jnJ1qoHMCKSQ2Ov1UF0/5/3U3sVUr08UEsdiUUta3GCIHmdh6 +C11Q+nms9NSIO2Jd10gXbphwuFn8NFJH1RhDcL8uw9+cWdyvndMyY02s8ie5xw7u7 /q5vKWeHzsv/qGcALZ0Kr0aeN1Cuq2qpKUbCSVWjFhaoJyhIQmLTlBzHw63LaRK1q4 9+MZfpVCKNlTbcwDZH2x6+4MdD1Rxs1t4zHNTrLe+61qPXXuIcOt6oOOi8XVDwiyg/ aSkPGfN1lYeXxawti09Y59wKlo5FLK7oxb4ZcFE0CFPMP1a9nDztahrG+/G5gm+kmo r+ijCfwu/zamA== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mail.sberdevices.ru (Postfix) with ESMTP; Fri, 11 Mar 2022 13:58:48 +0300 (MSK) From: Krasnov Arseniy Vladimirovich To: Stefano Garzarella CC: Krasnov Arseniy , Rokosov Dmitry Dmitrievich , Krasnov Arseniy Vladimirovich , "kvm@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: [RFC PATCH v1 3/3] af_vsock: SOCK_SEQPACKET broken buffer test Thread-Topic: [RFC PATCH v1 3/3] af_vsock: SOCK_SEQPACKET broken buffer test Thread-Index: AQHYNTbvjWQnm44js0u5mxZaYZpaaQ== Date: Fri, 11 Mar 2022 10:58:32 +0000 Message-ID: In-Reply-To: <1bb5ce91-da53-7de9-49ba-f49f76f45512@sberdevices.ru> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.16.1.12] Content-ID: <067E1A7C5BB85447BE521D93922C4087@sberdevices.ru> MIME-Version: 1.0 X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2022/03/11 07:23:00 #18938550 X-KSMG-AntiVirus-Status: Clean, skipped Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-State: RFC Add test where sender sends two message, each with own data pattern. Reader tries to read first to broken buffer: it has three pages size, but middle page is unmapped. Then, reader tries to read second message to valid buffer. Test checks, that uncopied part of first message was dropped and thus not copied as part of second message. Signed-off-by: Arseniy Krasnov --- tools/testing/vsock/vsock_test.c | 121 +++++++++++++++++++++++++++++++ 1 file changed, 121 insertions(+) diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c index aa2de27d0f77..686af712b4ad 100644 --- a/tools/testing/vsock/vsock_test.c +++ b/tools/testing/vsock/vsock_test.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "timeout.h" #include "control.h" @@ -435,6 +436,121 @@ static void test_seqpacket_timeout_server(const struct test_opts *opts) close(fd); } +#define BUF_PATTERN_1 'a' +#define BUF_PATTERN_2 'b' + +static void test_seqpacket_invalid_rec_buffer_client(const struct test_opts *opts) +{ + int fd; + unsigned char *buf1; + unsigned char *buf2; + int buf_size = getpagesize() * 3; + + fd = vsock_seqpacket_connect(opts->peer_cid, 1234); + if (fd < 0) { + perror("connect"); + exit(EXIT_FAILURE); + } + + buf1 = malloc(buf_size); + if (buf1 == NULL) { + perror("'malloc()' for 'buf1'"); + exit(EXIT_FAILURE); + } + + buf2 = malloc(buf_size); + if (buf2 == NULL) { + perror("'malloc()' for 'buf2'"); + exit(EXIT_FAILURE); + } + + memset(buf1, BUF_PATTERN_1, buf_size); + memset(buf2, BUF_PATTERN_2, buf_size); + + if (send(fd, buf1, buf_size, 0) != buf_size) { + perror("send failed"); + exit(EXIT_FAILURE); + } + + if (send(fd, buf2, buf_size, 0) != buf_size) { + perror("send failed"); + exit(EXIT_FAILURE); + } + + close(fd); +} + +static void test_seqpacket_invalid_rec_buffer_server(const struct test_opts *opts) +{ + int fd; + unsigned char *broken_buf; + unsigned char *valid_buf; + int page_size = getpagesize(); + int buf_size = page_size * 3; + ssize_t res; + int prot = PROT_READ | PROT_WRITE; + int flags = MAP_PRIVATE | MAP_ANONYMOUS; + int i; + + fd = vsock_seqpacket_accept(VMADDR_CID_ANY, 1234, NULL); + if (fd < 0) { + perror("accept"); + exit(EXIT_FAILURE); + } + + /* Setup first buffer. */ + broken_buf = mmap(NULL, buf_size, prot, flags, -1, 0); + if (broken_buf == MAP_FAILED) { + perror("mmap for 'broken_buf'"); + exit(EXIT_FAILURE); + } + + /* Unmap "hole" in buffer. */ + if (munmap(broken_buf + page_size, page_size)) { + perror("'broken_buf' setup"); + exit(EXIT_FAILURE); + } + + valid_buf = mmap(NULL, buf_size, prot, flags, -1, 0); + if (valid_buf == MAP_FAILED) { + perror("mmap for 'valid_buf'"); + exit(EXIT_FAILURE); + } + + /* Try to fill buffer with unmapped middle. */ + res = read(fd, broken_buf, buf_size); + if (res != -1) { + perror("invalid read result of 'broken_buf'"); + exit(EXIT_FAILURE); + } + + if (errno != ENOMEM) { + perror("invalid errno of 'broken_buf'"); + exit(EXIT_FAILURE); + } + + /* Try to fill valid buffer. */ + res = read(fd, valid_buf, buf_size); + if (res != buf_size) { + perror("invalid read result of 'valid_buf'"); + exit(EXIT_FAILURE); + } + + for (i = 0; i < buf_size; i++) { + if (valid_buf[i] != BUF_PATTERN_2) { + perror("invalid pattern for valid buf"); + exit(EXIT_FAILURE); + } + } + + + /* Unmap buffers. */ + munmap(broken_buf, page_size); + munmap(broken_buf + page_size * 2, page_size); + munmap(valid_buf, buf_size); + close(fd); +} + static struct test_case test_cases[] = { { .name = "SOCK_STREAM connection reset", @@ -480,6 +596,11 @@ static struct test_case test_cases[] = { .run_client = test_seqpacket_timeout_client, .run_server = test_seqpacket_timeout_server, }, + { + .name = "SOCK_SEQPACKET invalid receive buffer", + .run_client = test_seqpacket_invalid_rec_buffer_client, + .run_server = test_seqpacket_invalid_rec_buffer_server, + }, {}, };