From 1a6fa10640d97e16d4184fa1c24aa8c3337d4653 Mon Sep 17 00:00:00 2001 From: John Sperbeck Date: Thu, 23 Jan 2020 15:51:44 -0800 Subject: selftests/bpf: Initialize duration variable before using The 'duration' variable is referenced in the CHECK() macro, and there are some uses of the macro before 'duration' is set. The clang compiler (validly) complains about this. Sample error: .../selftests/bpf/prog_tests/fexit_test.c:23:6: warning: variable 'duration' is uninitialized when used here [-Wuninitialized] if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .../selftests/bpf/test_progs.h:134:25: note: expanded from macro 'CHECK' if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _CHECK(condition, tag, duration, format) ^~~~~~~~ Signed-off-by: John Sperbeck Signed-off-by: Stanislav Fomichev Signed-off-by: Daniel Borkmann Acked-by: Martin KaFai Lau Link: https://lore.kernel.org/bpf/20200123235144.93610-1-sdf@google.com --- tools/testing/selftests/bpf/prog_tests/fentry_test.c | 2 +- tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c | 2 +- tools/testing/selftests/bpf/prog_tests/fexit_test.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'tools/testing/selftests/bpf') diff --git a/tools/testing/selftests/bpf/prog_tests/fentry_test.c b/tools/testing/selftests/bpf/prog_tests/fentry_test.c index e1a379f5f7d2..5cc06021f27d 100644 --- a/tools/testing/selftests/bpf/prog_tests/fentry_test.c +++ b/tools/testing/selftests/bpf/prog_tests/fentry_test.c @@ -9,7 +9,7 @@ void test_fentry_test(void) struct test_pkt_access *pkt_skel = NULL; struct fentry_test *fentry_skel = NULL; int err, pkt_fd, i; - __u32 duration, retval; + __u32 duration = 0, retval; __u64 *result; pkt_skel = test_pkt_access__open_and_load(); diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c index db5c74d2ce6d..cde463af7071 100644 --- a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c +++ b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c @@ -11,7 +11,7 @@ static void test_fexit_bpf2bpf_common(const char *obj_file, int err, pkt_fd, i; struct bpf_link **link = NULL; struct bpf_program **prog = NULL; - __u32 duration, retval; + __u32 duration = 0, retval; struct bpf_map *data_map; const int zero = 0; u64 *result = NULL; diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_test.c b/tools/testing/selftests/bpf/prog_tests/fexit_test.c index f99013222c74..d2c3655dd7a3 100644 --- a/tools/testing/selftests/bpf/prog_tests/fexit_test.c +++ b/tools/testing/selftests/bpf/prog_tests/fexit_test.c @@ -13,7 +13,7 @@ void test_fexit_test(void) int err, pkt_fd, kfree_skb_fd, i; struct bpf_link *link[6] = {}; struct bpf_program *prog[6]; - __u32 duration, retval; + __u32 duration = 0, retval; struct bpf_map *data_map; const int zero = 0; u64 result[6]; -- cgit v1.2.3-59-g8ed1b