From patchwork Fri Oct 6 17:57:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 13411794 X-Patchwork-Delegate: bpf@iogearbox.net Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 496D234191 for ; Fri, 6 Oct 2023 17:57:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9749CE for ; Fri, 6 Oct 2023 10:57:52 -0700 (PDT) Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 396EAqJJ009124 for ; Fri, 6 Oct 2023 10:57:52 -0700 Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3tj6dfg1d6-13 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 06 Oct 2023 10:57:51 -0700 Received: from twshared11278.41.prn1.facebook.com (2620:10d:c0a8:1c::11) by mail.thefacebook.com (2620:10d:c0a8:82::b) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Fri, 6 Oct 2023 10:57:50 -0700 Received: by devbig019.vll3.facebook.com (Postfix, from userid 137359) id 05550394AC8E1; Fri, 6 Oct 2023 10:57:44 -0700 (PDT) From: Andrii Nakryiko To: , , , CC: , , Jiri Olsa Subject: [PATCH v2 bpf-next 1/3] selftests/bpf: fix compiler warnings reported in -O2 mode Date: Fri, 6 Oct 2023 10:57:42 -0700 Message-ID: <20231006175744.3136675-1-andrii@kernel.org> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: zffCiSk8lTsd2nXFimJwTfzceCAjal5o X-Proofpoint-ORIG-GUID: zffCiSk8lTsd2nXFimJwTfzceCAjal5o X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-06_14,2023-10-06_01,2023-05-22_02 X-Spam-Status: No, score=-2.3 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net X-Patchwork-Delegate: bpf@iogearbox.net Fix a bunch of potentially unitialized variable usage warnings that are reported by GCC in -O2 mode. Also silence overzealous stringop-truncation class of warnings. Acked-by: Jiri Olsa Signed-off-by: Andrii Nakryiko --- tools/testing/selftests/bpf/Makefile | 4 +++- .../selftests/bpf/map_tests/map_in_map_batch_ops.c | 4 ++-- tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c | 4 ++-- tools/testing/selftests/bpf/prog_tests/connect_ping.c | 4 ++-- tools/testing/selftests/bpf/prog_tests/linked_list.c | 2 +- tools/testing/selftests/bpf/prog_tests/lwt_helpers.h | 3 ++- tools/testing/selftests/bpf/prog_tests/queue_stack_map.c | 2 +- tools/testing/selftests/bpf/prog_tests/sockmap_basic.c | 8 ++++---- tools/testing/selftests/bpf/prog_tests/sockmap_helpers.h | 2 +- tools/testing/selftests/bpf/prog_tests/sockmap_listen.c | 4 ++-- tools/testing/selftests/bpf/prog_tests/xdp_metadata.c | 2 +- tools/testing/selftests/bpf/test_loader.c | 4 ++-- tools/testing/selftests/bpf/xdp_features.c | 4 ++-- tools/testing/selftests/bpf/xdp_hw_metadata.c | 2 +- tools/testing/selftests/bpf/xskxceiver.c | 2 +- 15 files changed, 27 insertions(+), 24 deletions(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 12a60521d624..99f66bdf7698 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -27,7 +27,9 @@ endif BPF_GCC ?= $(shell command -v bpf-gcc;) SAN_CFLAGS ?= SAN_LDFLAGS ?= $(SAN_CFLAGS) -CFLAGS += -g -O0 -rdynamic -Wall -Werror $(GENFLAGS) $(SAN_CFLAGS) \ +CFLAGS += -g -O0 -rdynamic \ + -Wall -Werror \ + $(GENFLAGS) $(SAN_CFLAGS) \ -I$(CURDIR) -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ -I$(TOOLSINCDIR) -I$(APIDIR) -I$(OUTPUT) LDFLAGS += $(SAN_LDFLAGS) diff --git a/tools/testing/selftests/bpf/map_tests/map_in_map_batch_ops.c b/tools/testing/selftests/bpf/map_tests/map_in_map_batch_ops.c index 16f1671e4bde..66191ae9863c 100644 --- a/tools/testing/selftests/bpf/map_tests/map_in_map_batch_ops.c +++ b/tools/testing/selftests/bpf/map_tests/map_in_map_batch_ops.c @@ -33,11 +33,11 @@ static void create_inner_maps(enum bpf_map_type map_type, { int map_fd, map_index, ret; __u32 map_key = 0, map_id; - char map_name[15]; + char map_name[16]; for (map_index = 0; map_index < OUTER_MAP_ENTRIES; map_index++) { memset(map_name, 0, sizeof(map_name)); - sprintf(map_name, "inner_map_fd_%d", map_index); + snprintf(map_name, sizeof(map_name), "inner_map_fd_%d", map_index); map_fd = bpf_map_create(map_type, map_name, sizeof(__u32), sizeof(__u32), 1, NULL); CHECK(map_fd < 0, diff --git a/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c b/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c index d2d9e965eba5..053f4d6da77a 100644 --- a/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c +++ b/tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c @@ -193,8 +193,8 @@ static int setup_progs(struct bloom_filter_map **out_skel, __u32 **out_rand_vals void test_bloom_filter_map(void) { - __u32 *rand_vals, nr_rand_vals; - struct bloom_filter_map *skel; + __u32 *rand_vals = NULL, nr_rand_vals = 0; + struct bloom_filter_map *skel = NULL; int err; test_fail_cases(); diff --git a/tools/testing/selftests/bpf/prog_tests/connect_ping.c b/tools/testing/selftests/bpf/prog_tests/connect_ping.c index 289218c2216c..40fe571f2fe7 100644 --- a/tools/testing/selftests/bpf/prog_tests/connect_ping.c +++ b/tools/testing/selftests/bpf/prog_tests/connect_ping.c @@ -28,9 +28,9 @@ static void subtest(int cgroup_fd, struct connect_ping *skel, .sin6_family = AF_INET6, .sin6_addr = IN6ADDR_LOOPBACK_INIT, }; - struct sockaddr *sa; + struct sockaddr *sa = NULL; socklen_t sa_len; - int protocol; + int protocol = -1; int sock_fd; switch (family) { diff --git a/tools/testing/selftests/bpf/prog_tests/linked_list.c b/tools/testing/selftests/bpf/prog_tests/linked_list.c index db3bf6bbe01a..69dc31383b78 100644 --- a/tools/testing/selftests/bpf/prog_tests/linked_list.c +++ b/tools/testing/selftests/bpf/prog_tests/linked_list.c @@ -268,7 +268,7 @@ static struct btf *init_btf(void) static void list_and_rb_node_same_struct(bool refcount_field) { - int bpf_rb_node_btf_id, bpf_refcount_btf_id, foo_btf_id; + int bpf_rb_node_btf_id, bpf_refcount_btf_id = 0, foo_btf_id; struct btf *btf; int id, err; diff --git a/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h b/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h index 61333f2a03f9..e9190574e79f 100644 --- a/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h +++ b/tools/testing/selftests/bpf/prog_tests/lwt_helpers.h @@ -49,7 +49,8 @@ static int open_tuntap(const char *dev_name, bool need_mac) return -1; ifr.ifr_flags = IFF_NO_PI | (need_mac ? IFF_TAP : IFF_TUN); - memcpy(ifr.ifr_name, dev_name, IFNAMSIZ); + strncpy(ifr.ifr_name, dev_name, IFNAMSIZ - 1); + ifr.ifr_name[IFNAMSIZ - 1] = '\0'; err = ioctl(fd, TUNSETIFF, &ifr); if (!ASSERT_OK(err, "ioctl(TUNSETIFF)")) { diff --git a/tools/testing/selftests/bpf/prog_tests/queue_stack_map.c b/tools/testing/selftests/bpf/prog_tests/queue_stack_map.c index 722c5f2a7776..a043af9cd6d9 100644 --- a/tools/testing/selftests/bpf/prog_tests/queue_stack_map.c +++ b/tools/testing/selftests/bpf/prog_tests/queue_stack_map.c @@ -14,7 +14,7 @@ static void test_queue_stack_map_by_type(int type) int i, err, prog_fd, map_in_fd, map_out_fd; char file[32], buf[128]; struct bpf_object *obj; - struct iphdr iph; + struct iphdr iph = {}; LIBBPF_OPTS(bpf_test_run_opts, topts, .data_in = &pkt_v4, .data_size_in = sizeof(pkt_v4), diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c index 064cc5e8d9ad..2535d0653cc8 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_basic.c @@ -359,7 +359,7 @@ static void test_sockmap_progs_query(enum bpf_attach_type attach_type) static void test_sockmap_skb_verdict_shutdown(void) { struct epoll_event ev, events[MAX_EVENTS]; - int n, err, map, verdict, s, c1, p1; + int n, err, map, verdict, s, c1 = -1, p1 = -1; struct test_sockmap_pass_prog *skel; int epollfd; int zero = 0; @@ -414,9 +414,9 @@ static void test_sockmap_skb_verdict_shutdown(void) static void test_sockmap_skb_verdict_fionread(bool pass_prog) { int expected, zero = 0, sent, recvd, avail; - int err, map, verdict, s, c0, c1, p0, p1; - struct test_sockmap_pass_prog *pass; - struct test_sockmap_drop_prog *drop; + int err, map, verdict, s, c0 = -1, c1 = -1, p0 = -1, p1 = -1; + struct test_sockmap_pass_prog *pass = NULL; + struct test_sockmap_drop_prog *drop = NULL; char buf[256] = "0123456789"; if (pass_prog) { diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_helpers.h b/tools/testing/selftests/bpf/prog_tests/sockmap_helpers.h index 36d829a65aa4..e880f97bc44d 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_helpers.h +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_helpers.h @@ -378,7 +378,7 @@ static inline int enable_reuseport(int s, int progfd) static inline int socket_loopback_reuseport(int family, int sotype, int progfd) { struct sockaddr_storage addr; - socklen_t len; + socklen_t len = 0; int err, s; init_addr_loopback(family, &addr, &len); diff --git a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c index 8df8cbb447f1..e08e590b2cf8 100644 --- a/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c +++ b/tools/testing/selftests/bpf/prog_tests/sockmap_listen.c @@ -73,7 +73,7 @@ static void test_insert_bound(struct test_sockmap_listen *skel __always_unused, int family, int sotype, int mapfd) { struct sockaddr_storage addr; - socklen_t len; + socklen_t len = 0; u32 key = 0; u64 value; int err, s; @@ -871,7 +871,7 @@ static void test_msg_redir_to_listening(struct test_sockmap_listen *skel, static void redir_partial(int family, int sotype, int sock_map, int parser_map) { - int s, c0, c1, p0, p1; + int s, c0 = -1, c1 = -1, p0 = -1, p1 = -1; int err, n, key, value; char buf[] = "abc"; diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c index 626c461fa34d..4439ba9392f8 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_metadata.c @@ -226,7 +226,7 @@ static int verify_xsk_metadata(struct xsk *xsk) __u64 comp_addr; void *data; __u64 addr; - __u32 idx; + __u32 idx = 0; int ret; ret = recvfrom(xsk_socket__fd(xsk->socket), NULL, 0, MSG_DONTWAIT, NULL, NULL); diff --git a/tools/testing/selftests/bpf/test_loader.c b/tools/testing/selftests/bpf/test_loader.c index b4edd8454934..37ffa57f28a1 100644 --- a/tools/testing/selftests/bpf/test_loader.c +++ b/tools/testing/selftests/bpf/test_loader.c @@ -69,7 +69,7 @@ static int tester_init(struct test_loader *tester) { if (!tester->log_buf) { tester->log_buf_sz = TEST_LOADER_LOG_BUF_SZ; - tester->log_buf = malloc(tester->log_buf_sz); + tester->log_buf = calloc(tester->log_buf_sz, 1); if (!ASSERT_OK_PTR(tester->log_buf, "tester_log_buf")) return -ENOMEM; } @@ -538,7 +538,7 @@ void run_subtest(struct test_loader *tester, bool unpriv) { struct test_subspec *subspec = unpriv ? &spec->unpriv : &spec->priv; - struct bpf_program *tprog, *tprog_iter; + struct bpf_program *tprog = NULL, *tprog_iter; struct test_spec *spec_iter; struct cap_state caps = {}; struct bpf_object *tobj; diff --git a/tools/testing/selftests/bpf/xdp_features.c b/tools/testing/selftests/bpf/xdp_features.c index b449788fbd39..595c79141cf3 100644 --- a/tools/testing/selftests/bpf/xdp_features.c +++ b/tools/testing/selftests/bpf/xdp_features.c @@ -360,9 +360,9 @@ static int recv_msg(int sockfd, void *buf, size_t bufsize, void *val, static int dut_run(struct xdp_features *skel) { int flags = XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_DRV_MODE; - int state, err, *sockfd, ctrl_sockfd, echo_sockfd; + int state, err = 0, *sockfd, ctrl_sockfd, echo_sockfd; struct sockaddr_storage ctrl_addr; - pthread_t dut_thread; + pthread_t dut_thread = 0; socklen_t addrlen; sockfd = start_reuseport_server(AF_INET6, SOCK_STREAM, NULL, diff --git a/tools/testing/selftests/bpf/xdp_hw_metadata.c b/tools/testing/selftests/bpf/xdp_hw_metadata.c index 613321eb84c1..17c980138796 100644 --- a/tools/testing/selftests/bpf/xdp_hw_metadata.c +++ b/tools/testing/selftests/bpf/xdp_hw_metadata.c @@ -234,7 +234,7 @@ static int verify_metadata(struct xsk *rx_xsk, int rxq, int server_fd, clockid_t struct pollfd fds[rxq + 1]; __u64 comp_addr; __u64 addr; - __u32 idx; + __u32 idx = 0; int ret; int i; diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c index 837e0ffbdc47..591ca9637b23 100644 --- a/tools/testing/selftests/bpf/xskxceiver.c +++ b/tools/testing/selftests/bpf/xskxceiver.c @@ -1049,7 +1049,7 @@ static int __receive_pkts(struct test_spec *test, struct xsk_socket_info *xsk) struct xsk_umem_info *umem = xsk->umem; struct pollfd fds = { }; struct pkt *pkt; - u64 first_addr; + u64 first_addr = 0; int ret; fds.fd = xsk_socket__fd(xsk->xsk);