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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 | // SPDX-License-Identifier: GPL-2.0 /* Converted from tools/testing/selftests/bpf/verifier/cgroup_storage.c */ #include <linux/bpf.h> #include <bpf/bpf_helpers.h> #include "../../../include/linux/filter.h" #include "bpf_misc.h" struct { __uint(type, BPF_MAP_TYPE_CGROUP_STORAGE); __uint(max_entries, 0); __type(key, struct bpf_cgroup_storage_key); __type(value, char[TEST_DATA_LEN]); } cgroup_storage SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_HASH); __uint(max_entries, 1); __type(key, long long); __type(value, long long); } map_hash_8b SEC(".maps"); struct { __uint(type, BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE); __uint(max_entries, 0); __type(key, struct bpf_cgroup_storage_key); __type(value, char[64]); } percpu_cgroup_storage SEC(".maps"); SEC("cgroup/skb") __description("valid cgroup storage access") __success __success_unpriv __retval(0) __naked void valid_cgroup_storage_access(void) { asm volatile (" \ r2 = 0; \ r1 = %[cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid cgroup storage access 1") __failure __msg("cannot pass map_type 1 into func bpf_get_local_storage") __failure_unpriv __naked void invalid_cgroup_storage_access_1(void) { asm volatile (" \ r2 = 0; \ r1 = %[map_hash_8b] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(map_hash_8b) : __clobber_all); } SEC("cgroup/skb") __description("invalid cgroup storage access 2") __failure __msg("fd 1 is not pointing to valid bpf_map") __failure_unpriv __naked void invalid_cgroup_storage_access_2(void) { asm volatile (" \ r2 = 0; \ .8byte %[ld_map_fd]; \ .8byte 0; \ call %[bpf_get_local_storage]; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_insn(ld_map_fd, BPF_RAW_INSN(BPF_LD | BPF_DW | BPF_IMM, BPF_REG_1, BPF_PSEUDO_MAP_FD, 0, 1)) : __clobber_all); } SEC("cgroup/skb") __description("invalid cgroup storage access 3") __failure __msg("invalid access to map value, value_size=64 off=256 size=4") __failure_unpriv __naked void invalid_cgroup_storage_access_3(void) { asm volatile (" \ r2 = 0; \ r1 = %[cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 256); \ r1 += 1; \ r0 = 0; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid cgroup storage access 4") __failure __msg("invalid access to map value, value_size=64 off=-2 size=4") __failure_unpriv __flag(BPF_F_ANY_ALIGNMENT) __naked void invalid_cgroup_storage_access_4(void) { asm volatile (" \ r2 = 0; \ r1 = %[cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 - 2); \ r0 = r1; \ r1 += 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid cgroup storage access 5") __failure __msg("get_local_storage() doesn't support non-zero flags") __failure_unpriv __naked void invalid_cgroup_storage_access_5(void) { asm volatile (" \ r2 = 7; \ r1 = %[cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid cgroup storage access 6") __failure __msg("get_local_storage() doesn't support non-zero flags") __msg_unpriv("R2 leaks addr into helper function") __naked void invalid_cgroup_storage_access_6(void) { asm volatile (" \ r2 = r1; \ r1 = %[cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("valid per-cpu cgroup storage access") __success __success_unpriv __retval(0) __naked void per_cpu_cgroup_storage_access(void) { asm volatile (" \ r2 = 0; \ r1 = %[percpu_cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(percpu_cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid per-cpu cgroup storage access 1") __failure __msg("cannot pass map_type 1 into func bpf_get_local_storage") __failure_unpriv __naked void cpu_cgroup_storage_access_1(void) { asm volatile (" \ r2 = 0; \ r1 = %[map_hash_8b] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(map_hash_8b) : __clobber_all); } SEC("cgroup/skb") __description("invalid per-cpu cgroup storage access 2") __failure __msg("fd 1 is not pointing to valid bpf_map") __failure_unpriv __naked void cpu_cgroup_storage_access_2(void) { asm volatile (" \ r2 = 0; \ .8byte %[ld_map_fd]; \ .8byte 0; \ call %[bpf_get_local_storage]; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_insn(ld_map_fd, BPF_RAW_INSN(BPF_LD | BPF_DW | BPF_IMM, BPF_REG_1, BPF_PSEUDO_MAP_FD, 0, 1)) : __clobber_all); } SEC("cgroup/skb") __description("invalid per-cpu cgroup storage access 3") __failure __msg("invalid access to map value, value_size=64 off=256 size=4") __failure_unpriv __naked void cpu_cgroup_storage_access_3(void) { asm volatile (" \ r2 = 0; \ r1 = %[percpu_cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 256); \ r1 += 1; \ r0 = 0; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(percpu_cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid per-cpu cgroup storage access 4") __failure __msg("invalid access to map value, value_size=64 off=-2 size=4") __failure_unpriv __flag(BPF_F_ANY_ALIGNMENT) __naked void cpu_cgroup_storage_access_4(void) { asm volatile (" \ r2 = 0; \ r1 = %[cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 - 2); \ r0 = r1; \ r1 += 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid per-cpu cgroup storage access 5") __failure __msg("get_local_storage() doesn't support non-zero flags") __failure_unpriv __naked void cpu_cgroup_storage_access_5(void) { asm volatile (" \ r2 = 7; \ r1 = %[percpu_cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(percpu_cgroup_storage) : __clobber_all); } SEC("cgroup/skb") __description("invalid per-cpu cgroup storage access 6") __failure __msg("get_local_storage() doesn't support non-zero flags") __msg_unpriv("R2 leaks addr into helper function") __naked void cpu_cgroup_storage_access_6(void) { asm volatile (" \ r2 = r1; \ r1 = %[percpu_cgroup_storage] ll; \ call %[bpf_get_local_storage]; \ r1 = *(u32*)(r0 + 0); \ r0 = r1; \ r0 &= 1; \ exit; \ " : : __imm(bpf_get_local_storage), __imm_addr(percpu_cgroup_storage) : __clobber_all); } char _license[] SEC("license") = "GPL"; |