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Mon, 5 Aug 2019 07:11:16 +0000 From: "Oleinik, Alexander" To: "qemu-devel@nongnu.org" Thread-Topic: [RFC PATCH v2 16/17] fuzz: Add virtio-net fuzz targets Thread-Index: AQHVS1z5z57WA2eYQ0W72mbgaHRTUg== Date: Mon, 5 Aug 2019 07:11:16 +0000 Message-ID: <20190805071038.32146-17-alxndr@bu.edu> References: <20190805071038.32146-1-alxndr@bu.edu> In-Reply-To: <20190805071038.32146-1-alxndr@bu.edu> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.20.1 x-originating-ip: [128.197.127.33] x-clientproxiedby: BL0PR02CA0068.namprd02.prod.outlook.com (2603:10b6:207:3d::45) To CY4PR03MB2872.namprd03.prod.outlook.com (2603:10b6:903:134::17) authentication-results: spf=none (sender IP is ) smtp.mailfrom=alxndr@bu.edu; x-ms-exchange-messagesentrepresentingtype: 1 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 0236dfc3-51f7-4d70-e2bc-08d719741b8d x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600148)(711020)(4605104)(1401327)(2017052603328)(7193020); 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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: bu.edu X-MS-Exchange-CrossTenant-Network-Message-Id: 0236dfc3-51f7-4d70-e2bc-08d719741b8d X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Aug 2019 07:11:16.7537 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d57d32cc-c121-488f-b07b-dfe705680c71 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: alxndr@bu.edu X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR03MB2646 X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 [fuzzy] X-Received-From: 40.107.68.126 Subject: [Qemu-devel] [RFC PATCH v2 16/17] fuzz: Add virtio-net fuzz targets X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "pbonzini@redhat.com" , "bsd@redhat.com" , "stefanha@redhat.com" , "Oleinik, Alexander" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Alexander Oleinik --- tests/fuzz/virtio-net-fuzz.c | 254 +++++++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 tests/fuzz/virtio-net-fuzz.c diff --git a/tests/fuzz/virtio-net-fuzz.c b/tests/fuzz/virtio-net-fuzz.c new file mode 100644 index 0000000000..dfba2e3ca7 --- /dev/null +++ b/tests/fuzz/virtio-net-fuzz.c @@ -0,0 +1,254 @@ +#include "qemu/osdep.h" +#include "qemu/units.h" +#include "qapi/error.h" +#include "qemu-common.h" +#include "exec/memory.h" +#include "sysemu/sysemu.h" +#include "qemu/main-loop.h" + +#include "hw/virtio/virtio-net.h" +#include "hw/virtio/virtio.h" +#include "tests/libqos/virtio-net.h" +#include "fuzzer_hooks.h" +#include "snapshotting.h" + +#include "fuzz.h" +#include "qos_fuzz.h" + +#define MAX_INPUT_BUFFERS 10 + +typedef struct vq_action { + uint8_t queue; + uint8_t length; + uint8_t write; + uint8_t next; + bool kick; +} vq_action; + +static void virtio_net_ctrl_fuzz(const unsigned char *Data, size_t Size) +{ + uint64_t req_addr[10]; + int reqi =3D 0; + uint32_t free_head; + + QGuestAllocator *t_alloc =3D qos_alloc; + + QVirtioNet *net_if =3D qos_obj; + QVirtioDevice *dev =3D net_if->vdev; + QVirtQueue *q; + vq_action vqa; + int iters =3D 0; + while (true) { + if (Size < sizeof(vqa)) { + break; + } + vqa =3D *((vq_action *)Data); + Data +=3D sizeof(vqa); + Size -=3D sizeof(vqa); + + q =3D net_if->queues[2]; + + vqa.length =3D vqa.length >=3D Size ? Size : vqa.length; + + req_addr[reqi] =3D guest_alloc(t_alloc, vqa.length); + memwrite(req_addr[reqi], Data, vqa.length); + if (iters =3D=3D 0) { + free_head =3D qvirtqueue_add(q, req_addr[reqi], vqa.length, + vqa.write, vqa.next); + } else { + qvirtqueue_add(q, req_addr[reqi], vqa.length, vqa.write , vqa.= next); + } + iters++; + reqi++; + if (iters =3D=3D 10) { + break; + } + Data +=3D vqa.length; + Size -=3D vqa.length; + } + if (iters) { + qvirtqueue_kick(dev, q, free_head); + /* qtest_clock_step_next(s); */ + main_loop_wait(false); + for (int i =3D 0; i < reqi; i++) { + guest_free(t_alloc, req_addr[i]); + } + } + qtest_clear_rxbuf(s); + qos_object_queue_destroy(qos_obj); +} + +static void virtio_net_ctrl_fuzz_multi(const unsigned char *Data, size_t S= ize) +{ + uint64_t req_addr[10]; + int reqi =3D 0; + uint32_t free_head; + + QGuestAllocator *t_alloc =3D qos_alloc; + + QVirtioNet *net_if =3D qos_obj; + QVirtioDevice *dev =3D net_if->vdev; + QVirtQueue *q; + vq_action vqa; + int iters =3D 0; + while (Size >=3D sizeof(vqa)) { + vqa =3D *((vq_action *)Data); + Data +=3D sizeof(vqa); + Size -=3D sizeof(vqa); + if (vqa.kick && free_head) { + qvirtqueue_kick(dev, q, free_head); + qtest_clock_step_next(s); + main_loop_wait(false); + for (int i =3D 0; i < reqi; i++) { + guest_free(t_alloc, req_addr[i]); + } + reqi =3D 0; + } else { + q =3D net_if->queues[2]; + + vqa.length =3D vqa.length >=3D Size ? Size : vqa.length; + + req_addr[reqi] =3D guest_alloc(t_alloc, vqa.length); + memwrite(req_addr[reqi], Data, vqa.length); + if (iters =3D=3D 0) { + free_head =3D qvirtqueue_add(q, req_addr[reqi], vqa.length= , + vqa.write, vqa.next); + } else { + qvirtqueue_add(q, req_addr[reqi], vqa.length, vqa.write, + vqa.next) ; + } + iters++; + reqi++; + if (iters =3D=3D 10) { + break; + } + Data +=3D vqa.length; + Size -=3D vqa.length; + } + } + qtest_clear_rxbuf(s); + qos_object_queue_destroy(qos_obj); +} + +int *sv; +static void virtio_net_tx_fuzz(const unsigned char *Data, size_t Size) +{ + uint64_t req_addr[10]; + int reqi =3D 0; + uint32_t free_head; + + QGuestAllocator *t_alloc =3D qos_alloc; + + QVirtioNet *net_if =3D qos_obj; + QVirtioDevice *dev =3D net_if->vdev; + QVirtQueue *q; + vq_action vqa; + int iters =3D 0; + while (true) { + if (Size < sizeof(vqa)) { + break; + } + vqa =3D *((vq_action *)Data); + Data +=3D sizeof(vqa); + Size -=3D sizeof(vqa); + + q =3D net_if->queues[1]; + + vqa.length =3D vqa.length >=3D Size ? Size : vqa.length; + + req_addr[reqi] =3D guest_alloc(t_alloc, vqa.length); + memwrite(req_addr[reqi], Data, vqa.length); + if (iters =3D=3D 0) { + free_head =3D qvirtqueue_add(q, req_addr[reqi], vqa.length, + vqa.write, vqa.next); + } else { + qvirtqueue_add(q, req_addr[reqi], vqa.length, vqa.write, vqa.n= ext); + } + iters++; + reqi++; + if (iters =3D=3D 10) { + break; + } + Data +=3D vqa.length; + Size -=3D vqa.length; + } + if (iters) { + qvirtqueue_kick(dev, q, free_head); + qtest_clock_step_next(s); + main_loop_wait(false); + for (int i =3D 0; i < reqi; i++) { + guest_free(t_alloc, req_addr[i]); + } + } + qtest_clear_rxbuf(s); + qos_object_queue_destroy(qos_obj); +} + +static void *virtio_net_test_setup_socket(GString *cmd_line, void *arg) +{ + if (!sv) { + sv =3D g_new(int, 2); + int ret =3D socketpair(PF_UNIX, SOCK_STREAM, 0, sv); + fcntl(sv[0], F_SETFL, O_NONBLOCK); + g_assert_cmpint(ret, !=3D, -1); + } + g_string_append_printf(cmd_line, " -netdev socket,fd=3D%d,id=3Dhs0 ", = sv[1]); + return arg; +} + +static void fuzz_fork(const unsigned char *Data, size_t Size) +{ + if (fork() =3D=3D 0) { + main_loop_wait(false); + virtio_net_ctrl_fuzz(Data, Size); + counter_shm_store(); + _Exit(0); + } else { + wait(NULL); + counter_shm_load(); + } +} + +static void fork_pre_main(void) +{ + qos_setup(); + counter_shm_init(); +} + +static void register_virtio_net_fuzz_targets(void) +{ + QOSGraphTestOptions opts =3D { + .before =3D virtio_net_test_setup_socket, + }; + FuzzTarget fuzz_opts =3D { + .pre_main =3D qos_setup, + .pre_save_state =3D NULL, + .save_state =3D NULL, + .reset =3D &reboot, + .pre_fuzz =3D &qos_init_path, + .fuzz =3D &virtio_net_ctrl_fuzz, + .post_fuzz =3D NULL, + }; + fuzz_add_qos_target("virtio-net-ctrl-fuzz", "virtio-net ctrl virtqueue= \ + fuzzer", "virtio-net", &opts, &fuzz_opts); + + fuzz_opts.fuzz =3D &virtio_net_ctrl_fuzz_multi; + fuzz_add_qos_target("virtio-net-ctrl-multi-fuzz", "virtio-net ctrl\ + virtqueue fuzzer with multiple kicks", "virtio-net", &opts, + &fuzz_opts); + + fuzz_opts.fuzz =3D &virtio_net_tx_fuzz; + fuzz_add_qos_target("virtio-net-tx-fuzz", "virtio-net tx virtqueue fuz= zer", + "virtio-net", &opts, &fuzz_opts); + + fuzz_opts.pre_main =3D &fork_pre_main; + fuzz_opts.pre_save_state =3D &qos_init_path; + fuzz_opts.reset =3D NULL; + fuzz_opts.pre_fuzz =3D NULL; + fuzz_opts.fuzz =3D &fuzz_fork; + fuzz_add_qos_target("virtio-net-fork", "virtio-net tx virtqueue", + "virtio-net", &opts, &fuzz_opts); + +} + +fuzz_target_init(register_virtio_net_fuzz_targets); --=20 2.20.1