Loading...
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 | // SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/raw_stack.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" SEC("socket") __description("raw_stack: no skb_load_bytes") __success __failure_unpriv __msg_unpriv("invalid read from stack R6 off=-8 size=8") __naked void stack_no_skb_load_bytes(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ r3 = r6; \ r4 = 8; \ /* Call to skb_load_bytes() omitted. */ \ r0 = *(u64*)(r6 + 0); \ exit; \ " ::: __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, negative len") __failure __msg("R4 min value is negative") __naked void skb_load_bytes_negative_len(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ r3 = r6; \ r4 = -8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, negative len 2") __failure __msg("R4 min value is negative") __naked void load_bytes_negative_len_2(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ r3 = r6; \ r4 = %[__imm_0]; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes), __imm_const(__imm_0, ~0) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, zero len") __failure __msg("invalid zero-sized read") __naked void skb_load_bytes_zero_len(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ r3 = r6; \ r4 = 0; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, no init") __success __retval(0) __naked void skb_load_bytes_no_init(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, init") __success __retval(0) __naked void stack_skb_load_bytes_init(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ r3 = 0xcafe; \ *(u64*)(r6 + 0) = r3; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, spilled regs around bounds") __success __retval(0) __naked void bytes_spilled_regs_around_bounds(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -16; \ *(u64*)(r6 - 8) = r1; \ *(u64*)(r6 + 8) = r1; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 - 8); \ r2 = *(u64*)(r6 + 8); \ r0 = *(u32*)(r0 + %[__sk_buff_mark]); \ r2 = *(u32*)(r2 + %[__sk_buff_priority]); \ r0 += r2; \ exit; \ " : : __imm(bpf_skb_load_bytes), __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)), __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority)) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, spilled regs corruption") __failure __msg("R0 invalid mem access 'scalar'") __flag(BPF_F_ANY_ALIGNMENT) __naked void load_bytes_spilled_regs_corruption(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -8; \ *(u64*)(r6 + 0) = r1; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ r0 = *(u32*)(r0 + %[__sk_buff_mark]); \ exit; \ " : : __imm(bpf_skb_load_bytes), __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, spilled regs corruption 2") __failure __msg("R3 invalid mem access 'scalar'") __flag(BPF_F_ANY_ALIGNMENT) __naked void bytes_spilled_regs_corruption_2(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -16; \ *(u64*)(r6 - 8) = r1; \ *(u64*)(r6 + 0) = r1; \ *(u64*)(r6 + 8) = r1; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 - 8); \ r2 = *(u64*)(r6 + 8); \ r3 = *(u64*)(r6 + 0); \ r0 = *(u32*)(r0 + %[__sk_buff_mark]); \ r2 = *(u32*)(r2 + %[__sk_buff_priority]); \ r0 += r2; \ r3 = *(u32*)(r3 + %[__sk_buff_pkt_type]); \ r0 += r3; \ exit; \ " : : __imm(bpf_skb_load_bytes), __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)), __imm_const(__sk_buff_pkt_type, offsetof(struct __sk_buff, pkt_type)), __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority)) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, spilled regs + data") __success __retval(0) __naked void load_bytes_spilled_regs_data(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -16; \ *(u64*)(r6 - 8) = r1; \ *(u64*)(r6 + 0) = r1; \ *(u64*)(r6 + 8) = r1; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 - 8); \ r2 = *(u64*)(r6 + 8); \ r3 = *(u64*)(r6 + 0); \ r0 = *(u32*)(r0 + %[__sk_buff_mark]); \ r2 = *(u32*)(r2 + %[__sk_buff_priority]); \ r0 += r2; \ r0 += r3; \ exit; \ " : : __imm(bpf_skb_load_bytes), __imm_const(__sk_buff_mark, offsetof(struct __sk_buff, mark)), __imm_const(__sk_buff_priority, offsetof(struct __sk_buff, priority)) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, invalid access 1") __failure __msg("invalid indirect access to stack R3 off=-513 size=8") __naked void load_bytes_invalid_access_1(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -513; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, invalid access 2") __failure __msg("invalid indirect access to stack R3 off=-1 size=8") __naked void load_bytes_invalid_access_2(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -1; \ r3 = r6; \ r4 = 8; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, invalid access 3") __failure __msg("R4 min value is negative") __naked void load_bytes_invalid_access_3(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += 0xffffffff; \ r3 = r6; \ r4 = 0xffffffff; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, invalid access 4") __failure __msg("R4 unbounded memory access, use 'var &= const' or 'if (var < const)'") __naked void load_bytes_invalid_access_4(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -1; \ r3 = r6; \ r4 = 0x7fffffff; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, invalid access 5") __failure __msg("R4 unbounded memory access, use 'var &= const' or 'if (var < const)'") __naked void load_bytes_invalid_access_5(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -512; \ r3 = r6; \ r4 = 0x7fffffff; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, invalid access 6") __failure __msg("invalid zero-sized read") __naked void load_bytes_invalid_access_6(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -512; \ r3 = r6; \ r4 = 0; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } SEC("tc") __description("raw_stack: skb_load_bytes, large access") __success __retval(0) __naked void skb_load_bytes_large_access(void) { asm volatile (" \ r2 = 4; \ r6 = r10; \ r6 += -512; \ r3 = r6; \ r4 = 512; \ call %[bpf_skb_load_bytes]; \ r0 = *(u64*)(r6 + 0); \ exit; \ " : : __imm(bpf_skb_load_bytes) : __clobber_all); } char _license[] SEC("license") = "GPL"; |