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Message-Id: <20200116170509.12787-295-sashal@kernel.org>
Date: Thu, 16 Jan 2020 12:03:16 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Alexei Starovoitov <ast@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Daniel Borkmann <daniel@...earbox.net>,
Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org,
bpf@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 558/671] bpf: fix BTF limits
From: Alexei Starovoitov <ast@...nel.org>
[ 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@...nel.org>
Acked-by: Martin KaFai Lau <kafai@...com>
Signed-off-by: Daniel Borkmann <daniel@...earbox.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
include/uapi/linux/btf.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/uapi/linux/btf.h b/include/uapi/linux/btf.h
index 972265f32871..1e2662ff0529 100644
--- 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
--
2.20.1
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