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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 | // SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/ctx_sk_msg.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" SEC("sk_msg") __description("valid access family in SK_MSG") __success __naked void access_family_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_family]); \ exit; \ " : : __imm_const(sk_msg_md_family, offsetof(struct sk_msg_md, family)) : __clobber_all); } SEC("sk_msg") __description("valid access remote_ip4 in SK_MSG") __success __naked void remote_ip4_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_remote_ip4]); \ exit; \ " : : __imm_const(sk_msg_md_remote_ip4, offsetof(struct sk_msg_md, remote_ip4)) : __clobber_all); } SEC("sk_msg") __description("valid access local_ip4 in SK_MSG") __success __naked void local_ip4_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_local_ip4]); \ exit; \ " : : __imm_const(sk_msg_md_local_ip4, offsetof(struct sk_msg_md, local_ip4)) : __clobber_all); } SEC("sk_msg") __description("valid access remote_port in SK_MSG") __success __naked void remote_port_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_remote_port]); \ exit; \ " : : __imm_const(sk_msg_md_remote_port, offsetof(struct sk_msg_md, remote_port)) : __clobber_all); } SEC("sk_msg") __description("valid access local_port in SK_MSG") __success __naked void local_port_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_local_port]); \ exit; \ " : : __imm_const(sk_msg_md_local_port, offsetof(struct sk_msg_md, local_port)) : __clobber_all); } SEC("sk_skb") __description("valid access remote_ip6 in SK_MSG") __success __naked void remote_ip6_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_remote_ip6_0]); \ r0 = *(u32*)(r1 + %[sk_msg_md_remote_ip6_1]); \ r0 = *(u32*)(r1 + %[sk_msg_md_remote_ip6_2]); \ r0 = *(u32*)(r1 + %[sk_msg_md_remote_ip6_3]); \ exit; \ " : : __imm_const(sk_msg_md_remote_ip6_0, offsetof(struct sk_msg_md, remote_ip6[0])), __imm_const(sk_msg_md_remote_ip6_1, offsetof(struct sk_msg_md, remote_ip6[1])), __imm_const(sk_msg_md_remote_ip6_2, offsetof(struct sk_msg_md, remote_ip6[2])), __imm_const(sk_msg_md_remote_ip6_3, offsetof(struct sk_msg_md, remote_ip6[3])) : __clobber_all); } SEC("sk_skb") __description("valid access local_ip6 in SK_MSG") __success __naked void local_ip6_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_local_ip6_0]); \ r0 = *(u32*)(r1 + %[sk_msg_md_local_ip6_1]); \ r0 = *(u32*)(r1 + %[sk_msg_md_local_ip6_2]); \ r0 = *(u32*)(r1 + %[sk_msg_md_local_ip6_3]); \ exit; \ " : : __imm_const(sk_msg_md_local_ip6_0, offsetof(struct sk_msg_md, local_ip6[0])), __imm_const(sk_msg_md_local_ip6_1, offsetof(struct sk_msg_md, local_ip6[1])), __imm_const(sk_msg_md_local_ip6_2, offsetof(struct sk_msg_md, local_ip6[2])), __imm_const(sk_msg_md_local_ip6_3, offsetof(struct sk_msg_md, local_ip6[3])) : __clobber_all); } SEC("sk_msg") __description("valid access size in SK_MSG") __success __naked void access_size_in_sk_msg(void) { asm volatile (" \ r0 = *(u32*)(r1 + %[sk_msg_md_size]); \ exit; \ " : : __imm_const(sk_msg_md_size, offsetof(struct sk_msg_md, size)) : __clobber_all); } SEC("sk_msg") __description("invalid 64B read of size in SK_MSG") __failure __msg("invalid bpf_context access") __flag(BPF_F_ANY_ALIGNMENT) __naked void of_size_in_sk_msg(void) { asm volatile (" \ r2 = *(u64*)(r1 + %[sk_msg_md_size]); \ exit; \ " : : __imm_const(sk_msg_md_size, offsetof(struct sk_msg_md, size)) : __clobber_all); } SEC("sk_msg") __description("invalid read past end of SK_MSG") __failure __msg("invalid bpf_context access") __naked void past_end_of_sk_msg(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[__imm_0]); \ exit; \ " : : __imm_const(__imm_0, offsetof(struct sk_msg_md, size) + 4) : __clobber_all); } SEC("sk_msg") __description("invalid read offset in SK_MSG") __failure __msg("invalid bpf_context access") __flag(BPF_F_ANY_ALIGNMENT) __naked void read_offset_in_sk_msg(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[__imm_0]); \ exit; \ " : : __imm_const(__imm_0, offsetof(struct sk_msg_md, family) + 1) : __clobber_all); } SEC("sk_msg") __description("direct packet read for SK_MSG") __success __naked void packet_read_for_sk_msg(void) { asm volatile (" \ r2 = *(u64*)(r1 + %[sk_msg_md_data]); \ r3 = *(u64*)(r1 + %[sk_msg_md_data_end]); \ r0 = r2; \ r0 += 8; \ if r0 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(sk_msg_md_data, offsetof(struct sk_msg_md, data)), __imm_const(sk_msg_md_data_end, offsetof(struct sk_msg_md, data_end)) : __clobber_all); } SEC("sk_msg") __description("direct packet write for SK_MSG") __success __naked void packet_write_for_sk_msg(void) { asm volatile (" \ r2 = *(u64*)(r1 + %[sk_msg_md_data]); \ r3 = *(u64*)(r1 + %[sk_msg_md_data_end]); \ r0 = r2; \ r0 += 8; \ if r0 > r3 goto l0_%=; \ *(u8*)(r2 + 0) = r2; \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(sk_msg_md_data, offsetof(struct sk_msg_md, data)), __imm_const(sk_msg_md_data_end, offsetof(struct sk_msg_md, data_end)) : __clobber_all); } SEC("sk_msg") __description("overlapping checks for direct packet access SK_MSG") __success __naked void direct_packet_access_sk_msg(void) { asm volatile (" \ r2 = *(u64*)(r1 + %[sk_msg_md_data]); \ r3 = *(u64*)(r1 + %[sk_msg_md_data_end]); \ r0 = r2; \ r0 += 8; \ if r0 > r3 goto l0_%=; \ r1 = r2; \ r1 += 6; \ if r1 > r3 goto l0_%=; \ r0 = *(u16*)(r2 + 6); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(sk_msg_md_data, offsetof(struct sk_msg_md, data)), __imm_const(sk_msg_md_data_end, offsetof(struct sk_msg_md, data_end)) : __clobber_all); } char _license[] SEC("license") = "GPL"; |