Commit 7dd8d611 authored by Stanislav Fomichev's avatar Stanislav Fomichev Committed by Daniel Borkmann
Browse files

selftests/bpf: add selftests for wide loads 



Mirror existing wide store tests with wide loads. The only significant
difference is expected error string.

Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: default avatarStanislav Fomichev <sdf@google.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 8b45063c

tools/testing/selftests/bpf/verifier/wide_access.c

+37 −0
Original line number Diff line number Diff line
@@ -34,3 +34,40 @@ BPF_SOCK_ADDR_STORE(msg_src_ip6, 3, REJECT, 
		    "invalid bpf_context access off=56 size=8"),



#undef BPF_SOCK_ADDR_STORE



#define BPF_SOCK_ADDR_LOAD(field, off, res, err) \

{ \

	"wide load from bpf_sock_addr." #field "[" #off "]", \

	.insns = { \

	BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1, \

		    offsetof(struct bpf_sock_addr, field[off])), \

	BPF_MOV64_IMM(BPF_REG_0, 1), \

	BPF_EXIT_INSN(), \

	}, \

	.result = res, \

	.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR, \

	.expected_attach_type = BPF_CGROUP_UDP6_SENDMSG, \

	.errstr = err, \

}



/* user_ip6[0] is u64 aligned */

BPF_SOCK_ADDR_LOAD(user_ip6, 0, ACCEPT,

		   NULL),

BPF_SOCK_ADDR_LOAD(user_ip6, 1, REJECT,

		   "invalid bpf_context access off=12 size=8"),

BPF_SOCK_ADDR_LOAD(user_ip6, 2, ACCEPT,

		   NULL),

BPF_SOCK_ADDR_LOAD(user_ip6, 3, REJECT,

		   "invalid bpf_context access off=20 size=8"),



/* msg_src_ip6[0] is _not_ u64 aligned */

BPF_SOCK_ADDR_LOAD(msg_src_ip6, 0, REJECT,

		   "invalid bpf_context access off=44 size=8"),

BPF_SOCK_ADDR_LOAD(msg_src_ip6, 1, ACCEPT,

		   NULL),

BPF_SOCK_ADDR_LOAD(msg_src_ip6, 2, REJECT,

		   "invalid bpf_context access off=52 size=8"),

BPF_SOCK_ADDR_LOAD(msg_src_ip6, 3, REJECT,

		   "invalid bpf_context access off=56 size=8"),



#undef BPF_SOCK_ADDR_LOAD

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