bpf: fix BTF limits

[ Upstream commit a0791f0df7d212c245761538b17a9ea93607b667 ]

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: 69b693f0aefa ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/include/uapi/linux/btf.h b/include/uapi/linux/btf.h
index 972265f..1e2662f 100644 (file)
--- a/include/uapi/linux/btf.h
+++ b/include/uapi/linux/btf.h
@@ -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