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Message-ID: <391d524c496acc97a8801d8bea80976f58485810.1700676682.git.dxu@dxuuu.xyz>
Date: Wed, 22 Nov 2023 11:20:27 -0700
From: Daniel Xu <dxu@...uu.xyz>
To: shuah@...nel.org,
daniel@...earbox.net,
andrii@...nel.org,
ast@...nel.org,
steffen.klassert@...unet.com,
antony.antony@...unet.com,
alexei.starovoitov@...il.com
Cc: mykolal@...com,
martin.lau@...ux.dev,
song@...nel.org,
yonghong.song@...ux.dev,
john.fastabend@...il.com,
kpsingh@...nel.org,
sdf@...gle.com,
haoluo@...gle.com,
jolsa@...nel.org,
bpf@...r.kernel.org,
linux-kselftest@...r.kernel.org,
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Subject: [PATCH ipsec-next v1 6/7] bpf: selftests: test_tunnel: Disable CO-RE relocations
Switching to vmlinux.h definitions seems to make the verifier very
unhappy with bitfield accesses. The error is:
; md.u.md2.dir = direction;
33: (69) r1 = *(u16 *)(r2 +11)
misaligned stack access off (0x0; 0x0)+-64+11 size 2
It looks like disabling CO-RE relocations seem to make the error go
away.
Co-developed-by: Antony Antony <antony.antony@...unet.com>
Signed-off-by: Antony Antony <antony.antony@...unet.com>
Signed-off-by: Daniel Xu <dxu@...uu.xyz>
---
tools/testing/selftests/bpf/progs/test_tunnel_kern.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
index 3065a716544d..ec7e04e012ae 100644
--- a/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
+++ b/tools/testing/selftests/bpf/progs/test_tunnel_kern.c
@@ -6,6 +6,7 @@
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*/
+#define BPF_NO_PRESERVE_ACCESS_INDEX
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_endian.h>
--
2.42.1
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