libbpf: fix BPF_LOG_BUF_SIZE off-by-one error
The BPF_PROG_LOAD condition for kernel version <= 5.1 is
log->len_total > UINT_MAX >> 8 /* (16 * 1024 * 1024) - 1 */
Signed-off-by: McCabe, Robert J <robert.mccabe@rockwellcollins.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index bc30783..ff2506f 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -92,7 +92,7 @@
#define MAPS_RELAX_COMPAT 0x01
/* Recommend log buffer size */
-#define BPF_LOG_BUF_SIZE (16 * 1024 * 1024) /* verifier maximum in kernels <= 5.1 */
+#define BPF_LOG_BUF_SIZE (UINT32_MAX >> 8) /* verifier maximum in kernels <= 5.1 */
LIBBPF_API int
bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
char *log_buf, size_t log_buf_sz);