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1{
2 "subtraction bounds (map value) variant 1",
3 .insns = {
4 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
5 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
6 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
7 BPF_LD_MAP_FD(BPF_REG_1, 0),
8 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
9 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9),
10 BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
11 BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0xff, 7),
12 BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_0, 1),
13 BPF_JMP_IMM(BPF_JGT, BPF_REG_3, 0xff, 5),
14 BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_3),
15 BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 56),
16 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
17 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
18 BPF_EXIT_INSN(),
19 BPF_MOV64_IMM(BPF_REG_0, 0),
20 BPF_EXIT_INSN(),
21 },
22 .fixup_map_hash_8b = { 3 },
23 .errstr = "R0 max value is outside of the array range",
24 .result = REJECT,
25},
26{
27 "subtraction bounds (map value) variant 2",
28 .insns = {
29 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
30 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
31 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
32 BPF_LD_MAP_FD(BPF_REG_1, 0),
33 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
34 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 8),
35 BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
36 BPF_JMP_IMM(BPF_JGT, BPF_REG_1, 0xff, 6),
37 BPF_LDX_MEM(BPF_B, BPF_REG_3, BPF_REG_0, 1),
38 BPF_JMP_IMM(BPF_JGT, BPF_REG_3, 0xff, 4),
39 BPF_ALU64_REG(BPF_SUB, BPF_REG_1, BPF_REG_3),
40 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
41 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
42 BPF_EXIT_INSN(),
43 BPF_MOV64_IMM(BPF_REG_0, 0),
44 BPF_EXIT_INSN(),
45 },
46 .fixup_map_hash_8b = { 3 },
47 .errstr = "R0 min value is negative, either use unsigned index or do a if (index >=0) check.",
48 .errstr_unpriv = "R1 has unknown scalar with mixed signed bounds",
49 .result = REJECT,
50},
51{
52 "check subtraction on pointers for unpriv",
53 .insns = {
54 BPF_MOV64_IMM(BPF_REG_0, 0),
55 BPF_LD_MAP_FD(BPF_REG_ARG1, 0),
56 BPF_MOV64_REG(BPF_REG_ARG2, BPF_REG_FP),
57 BPF_ALU64_IMM(BPF_ADD, BPF_REG_ARG2, -8),
58 BPF_ST_MEM(BPF_DW, BPF_REG_ARG2, 0, 9),
59 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
60 BPF_MOV64_REG(BPF_REG_9, BPF_REG_FP),
61 BPF_ALU64_REG(BPF_SUB, BPF_REG_9, BPF_REG_0),
62 BPF_LD_MAP_FD(BPF_REG_ARG1, 0),
63 BPF_MOV64_REG(BPF_REG_ARG2, BPF_REG_FP),
64 BPF_ALU64_IMM(BPF_ADD, BPF_REG_ARG2, -8),
65 BPF_ST_MEM(BPF_DW, BPF_REG_ARG2, 0, 0),
66 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
67 BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
68 BPF_EXIT_INSN(),
69 BPF_STX_MEM(BPF_DW, BPF_REG_0, BPF_REG_9, 0),
70 BPF_MOV64_IMM(BPF_REG_0, 0),
71 BPF_EXIT_INSN(),
72 },
73 .fixup_map_hash_8b = { 1, 9 },
74 .result = ACCEPT,
75 .result_unpriv = REJECT,
76 .errstr_unpriv = "R9 pointer -= pointer prohibited",
77},
78{
79 "bounds check based on zero-extended MOV",
80 .insns = {
81 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
82 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
83 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
84 BPF_LD_MAP_FD(BPF_REG_1, 0),
85 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
86 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
87 /* r2 = 0x0000'0000'ffff'ffff */
88 BPF_MOV32_IMM(BPF_REG_2, 0xffffffff),
89 /* r2 = 0 */
90 BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 32),
91 /* no-op */
92 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
93 /* access at offset 0 */
94 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
95 /* exit */
96 BPF_MOV64_IMM(BPF_REG_0, 0),
97 BPF_EXIT_INSN(),
98 },
99 .fixup_map_hash_8b = { 3 },
100 .result = ACCEPT
101},
102{
103 "bounds check based on sign-extended MOV. test1",
104 .insns = {
105 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
106 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
107 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
108 BPF_LD_MAP_FD(BPF_REG_1, 0),
109 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
110 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
111 /* r2 = 0xffff'ffff'ffff'ffff */
112 BPF_MOV64_IMM(BPF_REG_2, 0xffffffff),
113 /* r2 = 0xffff'ffff */
114 BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 32),
115 /* r0 = <oob pointer> */
116 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
117 /* access to OOB pointer */
118 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
119 /* exit */
120 BPF_MOV64_IMM(BPF_REG_0, 0),
121 BPF_EXIT_INSN(),
122 },
123 .fixup_map_hash_8b = { 3 },
124 .errstr = "map_value pointer and 4294967295",
125 .result = REJECT
126},
127{
128 "bounds check based on sign-extended MOV. test2",
129 .insns = {
130 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
131 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
132 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
133 BPF_LD_MAP_FD(BPF_REG_1, 0),
134 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
135 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
136 /* r2 = 0xffff'ffff'ffff'ffff */
137 BPF_MOV64_IMM(BPF_REG_2, 0xffffffff),
138 /* r2 = 0xfff'ffff */
139 BPF_ALU64_IMM(BPF_RSH, BPF_REG_2, 36),
140 /* r0 = <oob pointer> */
141 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_2),
142 /* access to OOB pointer */
143 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
144 /* exit */
145 BPF_MOV64_IMM(BPF_REG_0, 0),
146 BPF_EXIT_INSN(),
147 },
148 .fixup_map_hash_8b = { 3 },
149 .errstr = "R0 min value is outside of the array range",
150 .result = REJECT
151},
152{
153 "bounds check based on reg_off + var_off + insn_off. test1",
154 .insns = {
155 BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
156 offsetof(struct __sk_buff, mark)),
157 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
158 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
159 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
160 BPF_LD_MAP_FD(BPF_REG_1, 0),
161 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
162 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
163 BPF_ALU64_IMM(BPF_AND, BPF_REG_6, 1),
164 BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, (1 << 29) - 1),
165 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6),
166 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, (1 << 29) - 1),
167 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 3),
168 BPF_MOV64_IMM(BPF_REG_0, 0),
169 BPF_EXIT_INSN(),
170 },
171 .fixup_map_hash_8b = { 4 },
172 .errstr = "value_size=8 off=1073741825",
173 .result = REJECT,
174 .prog_type = BPF_PROG_TYPE_SCHED_CLS,
175},
176{
177 "bounds check based on reg_off + var_off + insn_off. test2",
178 .insns = {
179 BPF_LDX_MEM(BPF_W, BPF_REG_6, BPF_REG_1,
180 offsetof(struct __sk_buff, mark)),
181 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
182 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
183 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
184 BPF_LD_MAP_FD(BPF_REG_1, 0),
185 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
186 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 4),
187 BPF_ALU64_IMM(BPF_AND, BPF_REG_6, 1),
188 BPF_ALU64_IMM(BPF_ADD, BPF_REG_6, (1 << 30) - 1),
189 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_6),
190 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, (1 << 29) - 1),
191 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 3),
192 BPF_MOV64_IMM(BPF_REG_0, 0),
193 BPF_EXIT_INSN(),
194 },
195 .fixup_map_hash_8b = { 4 },
196 .errstr = "value 1073741823",
197 .result = REJECT,
198 .prog_type = BPF_PROG_TYPE_SCHED_CLS,
199},
200{
201 "bounds check after truncation of non-boundary-crossing range",
202 .insns = {
203 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
204 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
205 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
206 BPF_LD_MAP_FD(BPF_REG_1, 0),
207 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
208 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9),
209 /* r1 = [0x00, 0xff] */
210 BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
211 BPF_MOV64_IMM(BPF_REG_2, 1),
212 /* r2 = 0x10'0000'0000 */
213 BPF_ALU64_IMM(BPF_LSH, BPF_REG_2, 36),
214 /* r1 = [0x10'0000'0000, 0x10'0000'00ff] */
215 BPF_ALU64_REG(BPF_ADD, BPF_REG_1, BPF_REG_2),
216 /* r1 = [0x10'7fff'ffff, 0x10'8000'00fe] */
217 BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0x7fffffff),
218 /* r1 = [0x00, 0xff] */
219 BPF_ALU32_IMM(BPF_SUB, BPF_REG_1, 0x7fffffff),
220 /* r1 = 0 */
221 BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
222 /* no-op */
223 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
224 /* access at offset 0 */
225 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
226 /* exit */
227 BPF_MOV64_IMM(BPF_REG_0, 0),
228 BPF_EXIT_INSN(),
229 },
230 .fixup_map_hash_8b = { 3 },
231 .result = ACCEPT
232},
233{
234 "bounds check after truncation of boundary-crossing range (1)",
235 .insns = {
236 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
237 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
238 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
239 BPF_LD_MAP_FD(BPF_REG_1, 0),
240 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
241 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9),
242 /* r1 = [0x00, 0xff] */
243 BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
244 BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
245 /* r1 = [0xffff'ff80, 0x1'0000'007f] */
246 BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
247 /* r1 = [0xffff'ff80, 0xffff'ffff] or
248 * [0x0000'0000, 0x0000'007f]
249 */
250 BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 0),
251 BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
252 /* r1 = [0x00, 0xff] or
253 * [0xffff'ffff'0000'0080, 0xffff'ffff'ffff'ffff]
254 */
255 BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
256 /* r1 = 0 or
257 * [0x00ff'ffff'ff00'0000, 0x00ff'ffff'ffff'ffff]
258 */
259 BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
260 /* no-op or OOB pointer computation */
261 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
262 /* potentially OOB access */
263 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
264 /* exit */
265 BPF_MOV64_IMM(BPF_REG_0, 0),
266 BPF_EXIT_INSN(),
267 },
268 .fixup_map_hash_8b = { 3 },
269 /* not actually fully unbounded, but the bound is very high */
270 .errstr = "R0 unbounded memory access",
271 .result = REJECT
272},
273{
274 "bounds check after truncation of boundary-crossing range (2)",
275 .insns = {
276 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
277 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
278 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
279 BPF_LD_MAP_FD(BPF_REG_1, 0),
280 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
281 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 9),
282 /* r1 = [0x00, 0xff] */
283 BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
284 BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
285 /* r1 = [0xffff'ff80, 0x1'0000'007f] */
286 BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0xffffff80 >> 1),
287 /* r1 = [0xffff'ff80, 0xffff'ffff] or
288 * [0x0000'0000, 0x0000'007f]
289 * difference to previous test: truncation via MOV32
290 * instead of ALU32.
291 */
292 BPF_MOV32_REG(BPF_REG_1, BPF_REG_1),
293 BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
294 /* r1 = [0x00, 0xff] or
295 * [0xffff'ffff'0000'0080, 0xffff'ffff'ffff'ffff]
296 */
297 BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 0xffffff80 >> 1),
298 /* r1 = 0 or
299 * [0x00ff'ffff'ff00'0000, 0x00ff'ffff'ffff'ffff]
300 */
301 BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
302 /* no-op or OOB pointer computation */
303 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
304 /* potentially OOB access */
305 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
306 /* exit */
307 BPF_MOV64_IMM(BPF_REG_0, 0),
308 BPF_EXIT_INSN(),
309 },
310 .fixup_map_hash_8b = { 3 },
311 /* not actually fully unbounded, but the bound is very high */
312 .errstr = "R0 unbounded memory access",
313 .result = REJECT
314},
315{
316 "bounds check after wrapping 32-bit addition",
317 .insns = {
318 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
319 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
320 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
321 BPF_LD_MAP_FD(BPF_REG_1, 0),
322 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
323 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 5),
324 /* r1 = 0x7fff'ffff */
325 BPF_MOV64_IMM(BPF_REG_1, 0x7fffffff),
326 /* r1 = 0xffff'fffe */
327 BPF_ALU64_IMM(BPF_ADD, BPF_REG_1, 0x7fffffff),
328 /* r1 = 0 */
329 BPF_ALU32_IMM(BPF_ADD, BPF_REG_1, 2),
330 /* no-op */
331 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
332 /* access at offset 0 */
333 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
334 /* exit */
335 BPF_MOV64_IMM(BPF_REG_0, 0),
336 BPF_EXIT_INSN(),
337 },
338 .fixup_map_hash_8b = { 3 },
339 .result = ACCEPT
340},
341{
342 "bounds check after shift with oversized count operand",
343 .insns = {
344 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
345 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
346 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
347 BPF_LD_MAP_FD(BPF_REG_1, 0),
348 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
349 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
350 BPF_MOV64_IMM(BPF_REG_2, 32),
351 BPF_MOV64_IMM(BPF_REG_1, 1),
352 /* r1 = (u32)1 << (u32)32 = ? */
353 BPF_ALU32_REG(BPF_LSH, BPF_REG_1, BPF_REG_2),
354 /* r1 = [0x0000, 0xffff] */
355 BPF_ALU64_IMM(BPF_AND, BPF_REG_1, 0xffff),
356 /* computes unknown pointer, potentially OOB */
357 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
358 /* potentially OOB access */
359 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
360 /* exit */
361 BPF_MOV64_IMM(BPF_REG_0, 0),
362 BPF_EXIT_INSN(),
363 },
364 .fixup_map_hash_8b = { 3 },
365 .errstr = "R0 max value is outside of the array range",
366 .result = REJECT
367},
368{
369 "bounds check after right shift of maybe-negative number",
370 .insns = {
371 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
372 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
373 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
374 BPF_LD_MAP_FD(BPF_REG_1, 0),
375 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
376 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
377 /* r1 = [0x00, 0xff] */
378 BPF_LDX_MEM(BPF_B, BPF_REG_1, BPF_REG_0, 0),
379 /* r1 = [-0x01, 0xfe] */
380 BPF_ALU64_IMM(BPF_SUB, BPF_REG_1, 1),
381 /* r1 = 0 or 0xff'ffff'ffff'ffff */
382 BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
383 /* r1 = 0 or 0xffff'ffff'ffff */
384 BPF_ALU64_IMM(BPF_RSH, BPF_REG_1, 8),
385 /* computes unknown pointer, potentially OOB */
386 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
387 /* potentially OOB access */
388 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
389 /* exit */
390 BPF_MOV64_IMM(BPF_REG_0, 0),
391 BPF_EXIT_INSN(),
392 },
393 .fixup_map_hash_8b = { 3 },
394 .errstr = "R0 unbounded memory access",
395 .result = REJECT
396},
397{
398 "bounds check after 32-bit right shift with 64-bit input",
399 .insns = {
400 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
401 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
402 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
403 BPF_LD_MAP_FD(BPF_REG_1, 0),
404 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
405 BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 6),
406 /* r1 = 2 */
407 BPF_MOV64_IMM(BPF_REG_1, 2),
408 /* r1 = 1<<32 */
409 BPF_ALU64_IMM(BPF_LSH, BPF_REG_1, 31),
410 /* r1 = 0 (NOT 2!) */
411 BPF_ALU32_IMM(BPF_RSH, BPF_REG_1, 31),
412 /* r1 = 0xffff'fffe (NOT 0!) */
413 BPF_ALU32_IMM(BPF_SUB, BPF_REG_1, 2),
414 /* computes OOB pointer */
415 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
416 /* OOB access */
417 BPF_LDX_MEM(BPF_B, BPF_REG_0, BPF_REG_0, 0),
418 /* exit */
419 BPF_MOV64_IMM(BPF_REG_0, 0),
420 BPF_EXIT_INSN(),
421 },
422 .fixup_map_hash_8b = { 3 },
423 .errstr = "R0 invalid mem access",
424 .result = REJECT,
425},
426{
427 "bounds check map access with off+size signed 32bit overflow. test1",
428 .insns = {
429 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
430 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
431 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
432 BPF_LD_MAP_FD(BPF_REG_1, 0),
433 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
434 BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
435 BPF_EXIT_INSN(),
436 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x7ffffffe),
437 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
438 BPF_JMP_A(0),
439 BPF_EXIT_INSN(),
440 },
441 .fixup_map_hash_8b = { 3 },
442 .errstr = "map_value pointer and 2147483646",
443 .result = REJECT
444},
445{
446 "bounds check map access with off+size signed 32bit overflow. test2",
447 .insns = {
448 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
449 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
450 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
451 BPF_LD_MAP_FD(BPF_REG_1, 0),
452 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
453 BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
454 BPF_EXIT_INSN(),
455 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff),
456 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff),
457 BPF_ALU64_IMM(BPF_ADD, BPF_REG_0, 0x1fffffff),
458 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 0),
459 BPF_JMP_A(0),
460 BPF_EXIT_INSN(),
461 },
462 .fixup_map_hash_8b = { 3 },
463 .errstr = "pointer offset 1073741822",
464 .errstr_unpriv = "R0 pointer arithmetic of map value goes out of range",
465 .result = REJECT
466},
467{
468 "bounds check map access with off+size signed 32bit overflow. test3",
469 .insns = {
470 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
471 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
472 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
473 BPF_LD_MAP_FD(BPF_REG_1, 0),
474 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
475 BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
476 BPF_EXIT_INSN(),
477 BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 0x1fffffff),
478 BPF_ALU64_IMM(BPF_SUB, BPF_REG_0, 0x1fffffff),
479 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 2),
480 BPF_JMP_A(0),
481 BPF_EXIT_INSN(),
482 },
483 .fixup_map_hash_8b = { 3 },
484 .errstr = "pointer offset -1073741822",
485 .errstr_unpriv = "R0 pointer arithmetic of map value goes out of range",
486 .result = REJECT
487},
488{
489 "bounds check map access with off+size signed 32bit overflow. test4",
490 .insns = {
491 BPF_ST_MEM(BPF_DW, BPF_REG_10, -8, 0),
492 BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
493 BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -8),
494 BPF_LD_MAP_FD(BPF_REG_1, 0),
495 BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_map_lookup_elem),
496 BPF_JMP_IMM(BPF_JNE, BPF_REG_0, 0, 1),
497 BPF_EXIT_INSN(),
498 BPF_MOV64_IMM(BPF_REG_1, 1000000),
499 BPF_ALU64_IMM(BPF_MUL, BPF_REG_1, 1000000),
500 BPF_ALU64_REG(BPF_ADD, BPF_REG_0, BPF_REG_1),
501 BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_0, 2),
502 BPF_JMP_A(0),
503 BPF_EXIT_INSN(),
504 },
505 .fixup_map_hash_8b = { 3 },
506 .errstr = "map_value pointer and 1000000000000",
507 .result = REJECT
508},