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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 | // SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/meta_access.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" SEC("xdp") __description("meta access, test1") __success __retval(0) __naked void meta_access_test1(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r0 = r2; \ r0 += 8; \ if r0 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test2") __failure __msg("invalid access to packet, off=-8") __naked void meta_access_test2(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r0 = r2; \ r0 -= 8; \ r4 = r2; \ r4 += 8; \ if r4 > r3 goto l0_%=; \ r0 = *(u8*)(r0 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test3") __failure __msg("invalid access to packet") __naked void meta_access_test3(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data_end]); \ r0 = r2; \ r0 += 8; \ if r0 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test4") __failure __msg("invalid access to packet") __naked void meta_access_test4(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data_end]); \ r4 = *(u32*)(r1 + %[xdp_md_data]); \ r0 = r4; \ r0 += 8; \ if r0 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test5") __failure __msg("R3 !read_ok") __naked void meta_access_test5(void) { asm volatile (" \ r3 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r4 = *(u32*)(r1 + %[xdp_md_data]); \ r0 = r3; \ r0 += 8; \ if r0 > r4 goto l0_%=; \ r2 = -8; \ call %[bpf_xdp_adjust_meta]; \ r0 = *(u8*)(r3 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm(bpf_xdp_adjust_meta), __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test6") __failure __msg("invalid access to packet") __naked void meta_access_test6(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r0 = r3; \ r0 += 8; \ r4 = r2; \ r4 += 8; \ if r4 > r0 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test7") __success __retval(0) __naked void meta_access_test7(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r0 = r3; \ r0 += 8; \ r4 = r2; \ r4 += 8; \ if r4 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test8") __success __retval(0) __naked void meta_access_test8(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r4 = r2; \ r4 += 0xFFFF; \ if r4 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test9") __failure __msg("invalid access to packet") __naked void meta_access_test9(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r4 = r2; \ r4 += 0xFFFF; \ r4 += 1; \ if r4 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test10") __failure __msg("invalid access to packet") __naked void meta_access_test10(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r4 = *(u32*)(r1 + %[xdp_md_data_end]); \ r5 = 42; \ r6 = 24; \ *(u64*)(r10 - 8) = r5; \ lock *(u64 *)(r10 - 8) += r6; \ r5 = *(u64*)(r10 - 8); \ if r5 > 100 goto l0_%=; \ r3 += r5; \ r5 = r3; \ r6 = r2; \ r6 += 8; \ if r6 > r5 goto l0_%=; \ r2 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test11") __success __retval(0) __naked void meta_access_test11(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r5 = 42; \ r6 = 24; \ *(u64*)(r10 - 8) = r5; \ lock *(u64 *)(r10 - 8) += r6; \ r5 = *(u64*)(r10 - 8); \ if r5 > 100 goto l0_%=; \ r2 += r5; \ r5 = r2; \ r6 = r2; \ r6 += 8; \ if r6 > r3 goto l0_%=; \ r5 = *(u8*)(r5 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } SEC("xdp") __description("meta access, test12") __success __retval(0) __naked void meta_access_test12(void) { asm volatile (" \ r2 = *(u32*)(r1 + %[xdp_md_data_meta]); \ r3 = *(u32*)(r1 + %[xdp_md_data]); \ r4 = *(u32*)(r1 + %[xdp_md_data_end]); \ r5 = r3; \ r5 += 16; \ if r5 > r4 goto l0_%=; \ r0 = *(u8*)(r3 + 0); \ r5 = r2; \ r5 += 16; \ if r5 > r3 goto l0_%=; \ r0 = *(u8*)(r2 + 0); \ l0_%=: r0 = 0; \ exit; \ " : : __imm_const(xdp_md_data, offsetof(struct xdp_md, data)), __imm_const(xdp_md_data_end, offsetof(struct xdp_md, data_end)), __imm_const(xdp_md_data_meta, offsetof(struct xdp_md, data_meta)) : __clobber_all); } char _license[] SEC("license") = "GPL"; |