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#define BPF_SOCK_ADDR_STORE(field, off, res, err) \
{ \
"wide store to bpf_sock_addr." #field "[" #off "]", \
.insns = { \
BPF_MOV64_IMM(BPF_REG_0, 1), \
BPF_STX_MEM(BPF_DW, BPF_REG_1, BPF_REG_0, \
offsetof(struct bpf_sock_addr, field[off])), \
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_STORE(user_ip6, 0, ACCEPT,
NULL),
BPF_SOCK_ADDR_STORE(user_ip6, 1, REJECT,
"invalid bpf_context access off=12 size=8"),
BPF_SOCK_ADDR_STORE(user_ip6, 2, ACCEPT,
NULL),
BPF_SOCK_ADDR_STORE(user_ip6, 3, REJECT,
"invalid bpf_context access off=20 size=8"),
/* msg_src_ip6[0] is _not_ u64 aligned */
BPF_SOCK_ADDR_STORE(msg_src_ip6, 0, REJECT,
"invalid bpf_context access off=44 size=8"),
BPF_SOCK_ADDR_STORE(msg_src_ip6, 1, ACCEPT,
NULL),
BPF_SOCK_ADDR_STORE(msg_src_ip6, 2, REJECT,
"invalid bpf_context access off=52 size=8"),
BPF_SOCK_ADDR_STORE(msg_src_ip6, 3, REJECT,
"invalid bpf_context access off=56 size=8"),
#undef BPF_SOCK_ADDR_STORE
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