From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit c5d22f4cfe8dfb93f1db0a1e7e2e7ebc41395d98 ]
The snprintf() function returns the number of bytes which *would* have been copied if there were space. In other words, it can be
sizeof(pin_path).
Fixes: c0fa1b6c3efc ("bpf: btf: Add BTF tests") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Acked-by: Martin KaFai Lau kafai@fb.com Link: https://lore.kernel.org/r/YtZ+aD/tZMkgOUw+@kili Signed-off-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/bpf/prog_tests/btf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/btf.c b/tools/testing/selftests/bpf/prog_tests/btf.c index ec823561b912..a294176f8a9d 100644 --- a/tools/testing/selftests/bpf/prog_tests/btf.c +++ b/tools/testing/selftests/bpf/prog_tests/btf.c @@ -5226,7 +5226,7 @@ static void do_test_pprint(int test_num) ret = snprintf(pin_path, sizeof(pin_path), "%s/%s", "/sys/fs/bpf", test->map_name);
- if (CHECK(ret == sizeof(pin_path), "pin_path %s/%s is too long", + if (CHECK(ret >= sizeof(pin_path), "pin_path %s/%s is too long", "/sys/fs/bpf", test->map_name)) { err = -1; goto done;