libbpf: fix BPF_LOG_BUF_SIZE off-by-one error (4519efa6) · Commits · 戴 / test

The BPF_PROG_LOAD condition for kernel version <= 5.1 is log->len_total > UINT_MAX >> 8 /* (16 * 1024 * 1024) - 1 */ Signed-off-by:

tools/lib/bpf/bpf.h

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -92,7 +92,7 @@ struct bpf_load_program_attr {
	#define MAPS_RELAX_COMPAT 0x01		#define MAPS_RELAX_COMPAT 0x01

	/* Recommend log buffer size */		/* 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		LIBBPF_API int
	bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,		bpf_load_program_xattr(const struct bpf_load_program_attr *load_attr,
	char *log_buf, size_t log_buf_sz);		char *log_buf, size_t log_buf_sz);