Commit a0791f0d authored Sep 17, 2019 by Alexei Starovoitov Committed by Daniel Borkmann Sep 19, 2019

bpf: fix BTF limits



vmlinux BTF has more than 64k types.
Its string section is also at the offset larger than 64k.
Adjust both limits to make in-kernel BTF verifier successfully parse in-kernel BTF.

Fixes: 69b693f0 ("bpf: btf: Introduce BPF Type Format (BTF)")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

parent 9eea9849

include/uapi/linux/btf.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -22,9 +22,9 @@ struct btf_header {
		};

		/* Max # of type identifier */
		#define BTF_MAX_TYPE 0x0000ffff
		#define BTF_MAX_TYPE 0x000fffff
		/* Max offset into the string section */
		#define BTF_MAX_NAME_OFFSET 0x0000ffff
		#define BTF_MAX_NAME_OFFSET 0x00ffffff
		/* Max # of struct/union/enum members or func args */
		#define BTF_MAX_VLEN 0xffff