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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 | // SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/runtime_jit.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "bpf_misc.h" void dummy_prog_42_socket(void); void dummy_prog_24_socket(void); void dummy_prog_loop1_socket(void); void dummy_prog_loop2_socket(void); struct { __uint(type, BPF_MAP_TYPE_PROG_ARRAY); __uint(max_entries, 4); __uint(key_size, sizeof(int)); __array(values, void (void)); } map_prog1_socket SEC(".maps") = { .values = { [0] = (void *)&dummy_prog_42_socket, [1] = (void *)&dummy_prog_loop1_socket, [2] = (void *)&dummy_prog_24_socket, }, }; struct { __uint(type, BPF_MAP_TYPE_PROG_ARRAY); __uint(max_entries, 8); __uint(key_size, sizeof(int)); __array(values, void (void)); } map_prog2_socket SEC(".maps") = { .values = { [1] = (void *)&dummy_prog_loop2_socket, [2] = (void *)&dummy_prog_24_socket, [7] = (void *)&dummy_prog_42_socket, }, }; SEC("socket") __auxiliary __auxiliary_unpriv __naked void dummy_prog_42_socket(void) { asm volatile ("r0 = 42; exit;"); } SEC("socket") __auxiliary __auxiliary_unpriv __naked void dummy_prog_24_socket(void) { asm volatile ("r0 = 24; exit;"); } SEC("socket") __auxiliary __auxiliary_unpriv __naked void dummy_prog_loop1_socket(void) { asm volatile (" \ r3 = 1; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 41; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __auxiliary __auxiliary_unpriv __naked void dummy_prog_loop2_socket(void) { asm volatile (" \ r3 = 1; \ r2 = %[map_prog2_socket] ll; \ call %[bpf_tail_call]; \ r0 = 41; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog2_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, prog once") __success __success_unpriv __retval(42) __naked void call_within_bounds_prog_once(void) { asm volatile (" \ r3 = 0; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, prog loop") __success __success_unpriv __retval(41) __naked void call_within_bounds_prog_loop(void) { asm volatile (" \ r3 = 1; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, no prog") __success __success_unpriv __retval(1) __naked void call_within_bounds_no_prog(void) { asm volatile (" \ r3 = 3; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, key 2") __success __success_unpriv __retval(24) __naked void call_within_bounds_key_2(void) { asm volatile (" \ r3 = 2; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, key 2 / key 2, first branch") __success __success_unpriv __retval(24) __naked void _2_key_2_first_branch(void) { asm volatile (" \ r0 = 13; \ *(u8*)(r1 + %[__sk_buff_cb_0]) = r0; \ r0 = *(u8*)(r1 + %[__sk_buff_cb_0]); \ if r0 == 13 goto l0_%=; \ r3 = 2; \ r2 = %[map_prog1_socket] ll; \ goto l1_%=; \ l0_%=: r3 = 2; \ r2 = %[map_prog1_socket] ll; \ l1_%=: call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket), __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, key 2 / key 2, second branch") __success __success_unpriv __retval(24) __naked void _2_key_2_second_branch(void) { asm volatile (" \ r0 = 14; \ *(u8*)(r1 + %[__sk_buff_cb_0]) = r0; \ r0 = *(u8*)(r1 + %[__sk_buff_cb_0]); \ if r0 == 13 goto l0_%=; \ r3 = 2; \ r2 = %[map_prog1_socket] ll; \ goto l1_%=; \ l0_%=: r3 = 2; \ r2 = %[map_prog1_socket] ll; \ l1_%=: call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket), __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, key 0 / key 2, first branch") __success __success_unpriv __retval(24) __naked void _0_key_2_first_branch(void) { asm volatile (" \ r0 = 13; \ *(u8*)(r1 + %[__sk_buff_cb_0]) = r0; \ r0 = *(u8*)(r1 + %[__sk_buff_cb_0]); \ if r0 == 13 goto l0_%=; \ r3 = 0; \ r2 = %[map_prog1_socket] ll; \ goto l1_%=; \ l0_%=: r3 = 2; \ r2 = %[map_prog1_socket] ll; \ l1_%=: call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket), __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, key 0 / key 2, second branch") __success __success_unpriv __retval(42) __naked void _0_key_2_second_branch(void) { asm volatile (" \ r0 = 14; \ *(u8*)(r1 + %[__sk_buff_cb_0]) = r0; \ r0 = *(u8*)(r1 + %[__sk_buff_cb_0]); \ if r0 == 13 goto l0_%=; \ r3 = 0; \ r2 = %[map_prog1_socket] ll; \ goto l1_%=; \ l0_%=: r3 = 2; \ r2 = %[map_prog1_socket] ll; \ l1_%=: call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket), __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, different maps, first branch") __success __failure_unpriv __msg_unpriv("tail_call abusing map_ptr") __retval(1) __naked void bounds_different_maps_first_branch(void) { asm volatile (" \ r0 = 13; \ *(u8*)(r1 + %[__sk_buff_cb_0]) = r0; \ r0 = *(u8*)(r1 + %[__sk_buff_cb_0]); \ if r0 == 13 goto l0_%=; \ r3 = 0; \ r2 = %[map_prog1_socket] ll; \ goto l1_%=; \ l0_%=: r3 = 0; \ r2 = %[map_prog2_socket] ll; \ l1_%=: call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket), __imm_addr(map_prog2_socket), __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call within bounds, different maps, second branch") __success __failure_unpriv __msg_unpriv("tail_call abusing map_ptr") __retval(42) __naked void bounds_different_maps_second_branch(void) { asm volatile (" \ r0 = 14; \ *(u8*)(r1 + %[__sk_buff_cb_0]) = r0; \ r0 = *(u8*)(r1 + %[__sk_buff_cb_0]); \ if r0 == 13 goto l0_%=; \ r3 = 0; \ r2 = %[map_prog1_socket] ll; \ goto l1_%=; \ l0_%=: r3 = 0; \ r2 = %[map_prog2_socket] ll; \ l1_%=: call %[bpf_tail_call]; \ r0 = 1; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket), __imm_addr(map_prog2_socket), __imm_const(__sk_buff_cb_0, offsetof(struct __sk_buff, cb[0])) : __clobber_all); } SEC("socket") __description("runtime/jit: tail_call out of bounds") __success __success_unpriv __retval(2) __naked void tail_call_out_of_bounds(void) { asm volatile (" \ r3 = 256; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 2; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: pass negative index to tail_call") __success __success_unpriv __retval(2) __naked void negative_index_to_tail_call(void) { asm volatile (" \ r3 = -1; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 2; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } SEC("socket") __description("runtime/jit: pass > 32bit index to tail_call") __success __success_unpriv __retval(42) /* Verifier rewrite for unpriv skips tail call here. */ __retval_unpriv(2) __naked void _32bit_index_to_tail_call(void) { asm volatile (" \ r3 = 0x100000000 ll; \ r2 = %[map_prog1_socket] ll; \ call %[bpf_tail_call]; \ r0 = 2; \ exit; \ " : : __imm(bpf_tail_call), __imm_addr(map_prog1_socket) : __clobber_all); } char _license[] SEC("license") = "GPL"; |