From: Andrii Nakryiko Date: Tue, 5 Jul 2022 22:48:17 +0000 (-0700) Subject: selftests/bpf: Fix few more compiler warnings X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=c46a12200114ae5ad7b0922e6c8969a22c3afbd7;p=linux.git selftests/bpf: Fix few more compiler warnings When compiling with -O2, GCC detects few problems with selftests/bpf, so fix all of them. Two are real issues (uninitialized err and nums out-of-bounds access), but two other uninitialized variables warnings are due to GCC not being able to prove that variables are indeed initialized under conditions under which they are used. Fix all 4 cases, though. Signed-off-by: Andrii Nakryiko Signed-off-by: Daniel Borkmann Acked-by: Yonghong Song Acked-by: Jiri Olsa Link: https://lore.kernel.org/bpf/20220705224818.4026623-3-andrii@kernel.org --- diff --git a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c index 586dc52d6fb96..a8cb8a96ddafb 100644 --- a/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c +++ b/tools/testing/selftests/bpf/prog_tests/kprobe_multi_test.c @@ -329,7 +329,7 @@ static int get_syms(char ***symsp, size_t *cntp) struct hashmap *map; char buf[256]; FILE *f; - int err; + int err = 0; /* * The available_filter_functions contains many duplicates, @@ -404,7 +404,7 @@ static void test_bench_attach(void) double attach_delta, detach_delta; struct bpf_link *link = NULL; char **syms = NULL; - size_t cnt, i; + size_t cnt = 0, i; if (!ASSERT_OK(get_syms(&syms, &cnt), "get_syms")) return; diff --git a/tools/testing/selftests/bpf/prog_tests/usdt.c b/tools/testing/selftests/bpf/prog_tests/usdt.c index 5f733d50b0d70..9ad9da0f215ef 100644 --- a/tools/testing/selftests/bpf/prog_tests/usdt.c +++ b/tools/testing/selftests/bpf/prog_tests/usdt.c @@ -12,7 +12,7 @@ int lets_test_this(int); static volatile int idx = 2; static volatile __u64 bla = 0xFEDCBA9876543210ULL; -static volatile short nums[] = {-1, -2, -3, }; +static volatile short nums[] = {-1, -2, -3, -4}; static volatile struct { int x; diff --git a/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c b/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c index fb77a123fe896..874a846e298ca 100644 --- a/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c +++ b/tools/testing/selftests/bpf/prog_tests/xdp_synproxy.c @@ -63,7 +63,7 @@ static bool expect_str(char *buf, size_t size, const char *str, const char *name static void test_synproxy(bool xdp) { int server_fd = -1, client_fd = -1, accept_fd = -1; - char *prog_id, *prog_id_end; + char *prog_id = NULL, *prog_id_end; struct nstoken *ns = NULL; FILE *ctrl_file = NULL; char buf[CMD_OUT_BUF_SIZE];