Line data Source code
1 : #include "fd_vm_harness.h"
2 :
3 : static int
4 : fd_runtime_fuzz_vm_syscall_noop( void * _vm,
5 : ulong arg0,
6 : ulong arg1,
7 : ulong arg2,
8 : ulong arg3,
9 : ulong arg4,
10 0 : ulong* _ret){
11 : /* TODO: have input message determine CUs to deduct?
12 : fd_vm_t * vm = (fd_vm_t *) _vm;
13 : vm->cu = vm->cu - 5;
14 : */
15 :
16 0 : (void) _vm;
17 0 : (void) arg0;
18 0 : (void) arg1;
19 0 : (void) arg2;
20 0 : (void) arg3;
21 0 : (void) arg4;
22 0 : *_ret = 0;
23 0 : return 0;
24 0 : }
25 :
26 : static fd_sbpf_syscalls_t *
27 : fd_runtime_fuzz_lookup_syscall_func( fd_sbpf_syscalls_t * syscalls,
28 : const char * syscall_name,
29 0 : size_t len) {
30 0 : ulong i;
31 :
32 0 : if (!syscall_name) return NULL;
33 :
34 0 : for (i = 0; i < fd_sbpf_syscalls_slot_cnt(); ++i) {
35 0 : if (!fd_sbpf_syscalls_key_inval(syscalls[i].key) && syscalls[i].name && strlen(syscalls[i].name) == len) {
36 0 : if (!memcmp(syscalls[i].name, syscall_name, len)) {
37 0 : return syscalls + i;
38 0 : }
39 0 : }
40 0 : }
41 :
42 0 : return NULL;
43 0 : }
44 :
45 : static ulong
46 : fd_runtime_fuzz_load_from_vm_input_regions( fd_vm_input_region_t const * input,
47 : uint input_count,
48 : fd_exec_test_input_data_region_t ** output,
49 : pb_size_t * output_count,
50 : void * output_buf,
51 0 : ulong output_bufsz ) {
52 : /* pre-flight checks on output buffer size*/
53 0 : ulong input_regions_total_sz = 0;
54 0 : for( ulong i=0; i<input_count; i++ ) {
55 0 : input_regions_total_sz += input[i].region_sz;
56 0 : }
57 :
58 0 : if( FD_UNLIKELY( input_regions_total_sz == 0
59 0 : || output_bufsz < input_regions_total_sz ) ) {
60 0 : *output = NULL;
61 0 : *output_count = 0;
62 0 : return 0;
63 0 : }
64 :
65 0 : FD_SCRATCH_ALLOC_INIT( l, output_buf );
66 0 : *output = FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_exec_test_input_data_region_t),
67 0 : input_count * sizeof (fd_exec_test_input_data_region_t) );
68 0 : FD_TEST( *output );
69 0 : *output_count = input_count;
70 :
71 0 : for( ulong i=0; i<input_count; i++ ) {
72 0 : fd_vm_input_region_t const * vm_region = &input[i];
73 0 : fd_exec_test_input_data_region_t * out_region = &(*output)[i];
74 0 : out_region->is_writable = vm_region->is_writable;
75 0 : out_region->offset = vm_region->vaddr_offset;
76 :
77 0 : out_region->content = FD_SCRATCH_ALLOC_APPEND( l, alignof(pb_bytes_array_t),
78 0 : PB_BYTES_ARRAY_T_ALLOCSIZE(vm_region->region_sz) );
79 0 : FD_TEST( out_region->content );
80 0 : out_region->content->size = vm_region->region_sz;
81 0 : fd_memcpy( out_region->content->bytes, (void *)vm_region->haddr, vm_region->region_sz );
82 0 : }
83 :
84 0 : ulong end = FD_SCRATCH_ALLOC_FINI( l, 1UL );
85 0 : return end - (ulong)output_buf; /* return the number of bytes written */
86 0 : }
87 :
88 :
89 : ulong
90 : fd_runtime_fuzz_vm_interp_run( fd_runtime_fuzz_runner_t * runner,
91 : void const * input_,
92 : void ** output_,
93 : void * output_buf,
94 0 : ulong output_bufsz ) {
95 0 : fd_exec_test_syscall_context_t const * input = fd_type_pun_const( input_ );
96 0 : fd_exec_test_syscall_effects_t ** output = fd_type_pun( output_ );
97 :
98 : /* Create execution context */
99 0 : const fd_exec_test_instr_context_t * input_instr_ctx = &input->instr_ctx;
100 0 : fd_exec_instr_ctx_t instr_ctx[1];
101 0 : if( !fd_runtime_fuzz_instr_ctx_create( runner, instr_ctx, input_instr_ctx, true /* is_syscall avoids certain checks we don't want */ ) ) {
102 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, instr_ctx );
103 0 : return 0UL;
104 0 : }
105 :
106 0 : if( !( input->has_vm_ctx ) ) {
107 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, instr_ctx );
108 0 : return 0UL;
109 0 : }
110 :
111 0 : fd_spad_t * spad = runner->spad;
112 0 : fd_valloc_t valloc = fd_spad_virtual( spad );
113 :
114 : /* Create effects */
115 0 : ulong output_end = (ulong) output_buf + output_bufsz;
116 0 : FD_SCRATCH_ALLOC_INIT( l, output_buf );
117 0 : fd_exec_test_syscall_effects_t * effects =
118 0 : FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_exec_test_syscall_effects_t),
119 0 : sizeof (fd_exec_test_syscall_effects_t) );
120 0 : *effects = (fd_exec_test_syscall_effects_t) FD_EXEC_TEST_SYSCALL_EFFECTS_INIT_ZERO;
121 :
122 0 : if( FD_UNLIKELY( _l > output_end ) ) {
123 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, instr_ctx );
124 0 : return 0UL;
125 0 : }
126 :
127 0 : do{
128 : /* Setup regions */
129 0 : if ( !input->vm_ctx.rodata ) {
130 0 : break;
131 0 : }
132 0 : ulong rodata_sz = input->vm_ctx.rodata->size;
133 0 : uchar * rodata = fd_spad_alloc_check( spad, 8UL, rodata_sz );
134 0 : memcpy( rodata, input->vm_ctx.rodata->bytes, rodata_sz );
135 :
136 : /* Setup input region */
137 0 : ulong input_sz = 0UL;
138 0 : ulong pre_lens[256] = {0};
139 0 : fd_vm_input_region_t input_mem_regions[1000] = {0}; /* We can have a max of (3 * num accounts + 1) regions */
140 0 : fd_vm_acc_region_meta_t acc_region_metas[256] = {0}; /* instr acc idx to idx */
141 0 : uint input_mem_regions_cnt = 0U;
142 0 : int direct_mapping = FD_FEATURE_ACTIVE( instr_ctx->txn_ctx->slot, &instr_ctx->txn_ctx->features, bpf_account_data_direct_mapping );
143 0 : int mask_out_rent_epoch_in_vm_serialization = FD_FEATURE_ACTIVE( instr_ctx->txn_ctx->slot, &instr_ctx->txn_ctx->features, mask_out_rent_epoch_in_vm_serialization );
144 :
145 0 : uchar * input_ptr = NULL;
146 0 : uchar program_id_idx = instr_ctx->instr->program_id;
147 0 : fd_txn_account_t const * program_acc = &instr_ctx->txn_ctx->accounts[program_id_idx];
148 0 : uchar is_deprecated = ( program_id_idx < instr_ctx->txn_ctx->accounts_cnt ) &&
149 0 : ( !memcmp( program_acc->vt->get_owner( program_acc ), fd_solana_bpf_loader_deprecated_program_id.key, sizeof(fd_pubkey_t) ) );
150 :
151 : /* Push the instruction onto the stack. This may also modify the sysvar instructions account, if its present. */
152 0 : int stack_push_err = fd_instr_stack_push( instr_ctx->txn_ctx, (fd_instr_info_t *)instr_ctx->instr );
153 0 : if( FD_UNLIKELY( stack_push_err ) ) {
154 0 : FD_LOG_WARNING(( "instr stack push err" ));
155 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, instr_ctx );
156 0 : return 0;
157 0 : }
158 :
159 : /* Serialize accounts into input memory region. */
160 0 : int err = fd_bpf_loader_input_serialize_parameters( instr_ctx,
161 0 : &input_sz,
162 0 : pre_lens,
163 0 : input_mem_regions,
164 0 : &input_mem_regions_cnt,
165 0 : acc_region_metas,
166 0 : direct_mapping,
167 0 : mask_out_rent_epoch_in_vm_serialization,
168 0 : is_deprecated,
169 0 : &input_ptr );
170 0 : if( FD_UNLIKELY( err ) ) {
171 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, instr_ctx );
172 0 : return 0;
173 0 : }
174 :
175 0 : if( input->vm_ctx.heap_max>FD_VM_HEAP_DEFAULT ) {
176 0 : break;
177 0 : }
178 :
179 : /* Setup calldests from call_whitelist.
180 : Alloc calldests with the expected size (1 bit per ix, rounded up to ulong) */
181 0 : ulong max_pc = (rodata_sz + 7) / 8;
182 0 : ulong calldests_footprint = fd_sbpf_calldests_footprint( max_pc );
183 0 : void * calldests_mem = fd_valloc_malloc( valloc, fd_sbpf_calldests_align(), calldests_footprint );
184 0 : ulong * calldests = fd_sbpf_calldests_join( fd_sbpf_calldests_new( calldests_mem, max_pc ) );
185 0 : if( input->vm_ctx.call_whitelist && input->vm_ctx.call_whitelist->size > 0 ) {
186 0 : memcpy( calldests, input->vm_ctx.call_whitelist->bytes, input->vm_ctx.call_whitelist->size );
187 : /* Make sure bits over max_pc are all 0s. */
188 0 : ulong mask = (1UL << (max_pc % 64)) - 1UL;
189 0 : if ( max_pc % 64 != 0) {
190 0 : calldests[ max_pc / 64 ] &= mask;
191 0 : }
192 0 : }
193 0 : ulong entry_pc = fd_ulong_min( input->vm_ctx.entry_pc, rodata_sz / 8UL - 1UL );
194 0 : if( input->vm_ctx.sbpf_version >= FD_SBPF_V3 ) {
195 : /* in v3 we have to enable the entrypoint */
196 0 : calldests[ entry_pc / 64UL ] |= ( 1UL << ( entry_pc % 64UL ) );
197 0 : }
198 :
199 : /* Setup syscalls. Have them all be no-ops */
200 0 : fd_sbpf_syscalls_t * syscalls = fd_sbpf_syscalls_new( fd_valloc_malloc( valloc, fd_sbpf_syscalls_align(), fd_sbpf_syscalls_footprint() ) );
201 0 : fd_vm_syscall_register_slot( syscalls,
202 0 : instr_ctx->txn_ctx->slot,
203 0 : &instr_ctx->txn_ctx->features,
204 0 : 0 );
205 :
206 0 : for( ulong i=0; i< fd_sbpf_syscalls_slot_cnt(); i++ ){
207 0 : if( !fd_sbpf_syscalls_key_inval( syscalls[i].key ) ) {
208 0 : syscalls[i].func = fd_runtime_fuzz_vm_syscall_noop;
209 0 : }
210 0 : }
211 :
212 : /* Setup trace */
213 0 : const uint DUMP_TRACE = 0; // Set to 1 to dump trace to stdout
214 0 : uint tracing_enabled = input->vm_ctx.tracing_enabled;
215 0 : fd_vm_trace_t * trace = NULL;
216 0 : ulong event_max = 1UL<<20;
217 0 : ulong event_data_max = 2048UL;
218 :
219 0 : if (!!tracing_enabled) {
220 0 : trace = fd_vm_trace_new( fd_valloc_malloc( valloc, fd_vm_trace_align(), fd_vm_trace_footprint( event_max, event_data_max ) ), event_max, event_data_max );
221 0 : }
222 :
223 : /* Setup vm */
224 0 : fd_vm_t * vm = fd_vm_join( fd_vm_new( fd_valloc_malloc( valloc, fd_vm_align(), fd_vm_footprint() ) ) );
225 0 : FD_TEST( vm );
226 :
227 0 : fd_vm_init(
228 0 : vm,
229 0 : instr_ctx,
230 0 : input->vm_ctx.heap_max,
231 0 : input->has_instr_ctx ? input->instr_ctx.cu_avail : 0,
232 0 : rodata,
233 0 : rodata_sz,
234 0 : (ulong *) rodata, /* text*, same as rodata */
235 0 : rodata_sz / 8, /* text_cnt */
236 0 : 0, /* text_off */
237 0 : rodata_sz, /* text_sz */
238 0 : entry_pc,
239 0 : calldests,
240 0 : input->vm_ctx.sbpf_version,
241 0 : syscalls,
242 0 : trace, /* trace */
243 0 : NULL, /* sha */
244 0 : input_mem_regions,
245 0 : input_mem_regions_cnt,
246 0 : acc_region_metas, /* vm_acc_region_meta*/
247 0 : is_deprecated, /* is deprecated */
248 0 : direct_mapping, /* direct mapping */
249 0 : 0 /* dump_syscall_to_pb */
250 0 : );
251 :
252 : /* Setup registers.
253 : r1, r10, r11 are initialized by EbpfVm::new (r10) or EbpfVm::execute_program (r1, r11),
254 : or equivalently by fd_vm_init and fd_vm_setup_state_for_execution.
255 : Modifying them will most like break execution.
256 : In syscalls we allow override them (especially r1) because that simulates the fact
257 : that a program partially executed before reaching the syscall.
258 : Here we want to test what happens when the program starts from the beginning. */
259 0 : vm->reg[0] = input->vm_ctx.r0;
260 : // vm->reg[1] = input->vm_ctx.r1; // do not override
261 0 : vm->reg[2] = input->vm_ctx.r2;
262 0 : vm->reg[3] = input->vm_ctx.r3;
263 0 : vm->reg[4] = input->vm_ctx.r4;
264 0 : vm->reg[5] = input->vm_ctx.r5;
265 0 : vm->reg[6] = input->vm_ctx.r6;
266 0 : vm->reg[7] = input->vm_ctx.r7;
267 0 : vm->reg[8] = input->vm_ctx.r8;
268 0 : vm->reg[9] = input->vm_ctx.r9;
269 : // vm->reg[10] = input->vm_ctx.r10; // do not override
270 : // vm->reg[11] = input->vm_ctx.r11; // do not override
271 :
272 : // Validate the vm
273 0 : if( fd_vm_validate( vm ) != FD_VM_SUCCESS ) {
274 : // custom error, avoid -1 because we use it for "unknown error" in solfuzz-agave
275 0 : effects->error = -2;
276 0 : break;
277 0 : }
278 :
279 0 : if( input->syscall_invocation.stack_prefix ) {
280 0 : uchar * stack = input->syscall_invocation.stack_prefix->bytes;
281 0 : ulong stack_sz = fd_ulong_min(input->syscall_invocation.stack_prefix->size, FD_VM_STACK_MAX);
282 0 : fd_memcpy( vm->stack, stack, stack_sz );
283 0 : }
284 :
285 0 : if( input->syscall_invocation.heap_prefix ) {
286 0 : uchar * heap = input->syscall_invocation.heap_prefix->bytes;
287 0 : ulong heap_sz = fd_ulong_min(input->syscall_invocation.heap_prefix->size, FD_VM_HEAP_MAX);
288 0 : fd_memcpy( vm->heap, heap, heap_sz );
289 0 : }
290 :
291 : /* Run vm */
292 0 : int exec_res = 0;
293 0 : if (!!tracing_enabled) {
294 0 : exec_res = fd_vm_exec_trace( vm );
295 0 : if( DUMP_TRACE ) fd_vm_trace_printf( trace, syscalls );
296 0 : fd_vm_trace_delete( fd_vm_trace_leave( trace ) );
297 0 : } else {
298 0 : exec_res = fd_vm_exec_notrace( vm );
299 0 : }
300 :
301 : /* Agave does not have a SIGCALL error, and instead throws SIGILL */
302 0 : if( exec_res == FD_VM_ERR_SIGCALL ) exec_res = FD_VM_ERR_SIGILL;
303 0 : effects->error = -1 * exec_res;
304 :
305 : /* Capture outputs */
306 0 : effects->cu_avail = vm->cu;
307 0 : effects->frame_count = vm->frame_cnt;
308 0 : /* Only capture registers if no error */;
309 0 : effects->r0 = exec_res ? 0 : vm->reg[0];
310 0 : effects->r1 = exec_res ? 0 : vm->reg[1];
311 0 : effects->r2 = exec_res ? 0 : vm->reg[2];
312 0 : effects->r3 = exec_res ? 0 : vm->reg[3];
313 0 : effects->r4 = exec_res ? 0 : vm->reg[4];
314 0 : effects->r5 = exec_res ? 0 : vm->reg[5];
315 0 : effects->r6 = exec_res ? 0 : vm->reg[6];
316 0 : effects->r7 = exec_res ? 0 : vm->reg[7];
317 0 : effects->r8 = exec_res ? 0 : vm->reg[8];
318 0 : effects->r9 = exec_res ? 0 : vm->reg[9];
319 0 : effects->r10 = exec_res ? 0 : vm->reg[10];
320 :
321 : /* skip logs since syscalls are stubbed */
322 :
323 : /* CU error is difficult to properly compare as there may have been
324 : valid writes to the memory regions prior to capturing the error. And
325 : the pc might be well past (by an arbitrary amount) the instruction
326 : where the CU error occurred. */
327 0 : if( exec_res == FD_VM_ERR_SIGCOST ) break;
328 :
329 0 : effects->pc = vm->pc;
330 :
331 0 : if( vm->heap_max > 0 ) {
332 0 : effects->heap = FD_SCRATCH_ALLOC_APPEND(
333 0 : l, alignof(pb_bytes_array_t), PB_BYTES_ARRAY_T_ALLOCSIZE( vm->heap_max ) );
334 0 : effects->heap->size = (uint)vm->heap_max;
335 0 : fd_memcpy( effects->heap->bytes, vm->heap, vm->heap_max );
336 0 : }
337 :
338 : /* Compress stack by removing right-most 0s.
339 : This reduces the total size of effects/fixtures when stack is not used,
340 : otherwise each would waste 256kB. */
341 0 : int rtrim_sz;
342 0 : for( rtrim_sz=FD_VM_STACK_MAX-1; rtrim_sz>=0; rtrim_sz-- ) {
343 0 : if( vm->stack[rtrim_sz] != 0 ) break;
344 0 : }
345 0 : if( rtrim_sz > 0 || (vm->stack[0] != 0) ) {
346 0 : effects->stack = FD_SCRATCH_ALLOC_APPEND(
347 0 : l, alignof(pb_bytes_array_t), PB_BYTES_ARRAY_T_ALLOCSIZE( FD_VM_STACK_MAX ) );
348 0 : effects->stack->size = (uint)rtrim_sz+1;
349 0 : fd_memcpy( effects->stack->bytes, vm->stack, (ulong)rtrim_sz+1 );
350 0 : }
351 :
352 0 : effects->rodata = FD_SCRATCH_ALLOC_APPEND(
353 0 : l, alignof(pb_bytes_array_t), PB_BYTES_ARRAY_T_ALLOCSIZE( rodata_sz ) );
354 0 : effects->rodata->size = (uint)rodata_sz;
355 0 : fd_memcpy( effects->rodata->bytes, rodata, rodata_sz );
356 :
357 : /* Capture input data regions */
358 0 : ulong tmp_end = FD_SCRATCH_ALLOC_FINI(l, 1UL);
359 0 : ulong input_data_regions_size = fd_runtime_fuzz_load_from_vm_input_regions( vm->input_mem_regions,
360 0 : vm->input_mem_regions_cnt,
361 0 : &effects->input_data_regions,
362 0 : &effects->input_data_regions_count,
363 0 : (void *) tmp_end,
364 0 : fd_ulong_sat_sub( output_end, tmp_end) );
365 0 : FD_SCRATCH_ALLOC_APPEND( l, 1UL, input_data_regions_size );
366 :
367 0 : } while(0);
368 :
369 0 : ulong actual_end = FD_SCRATCH_ALLOC_FINI( l, 1UL );
370 0 : *output = effects;
371 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, instr_ctx );
372 0 : return actual_end - (ulong)output_buf;
373 0 : }
374 :
375 : ulong
376 : fd_runtime_fuzz_vm_syscall_run( fd_runtime_fuzz_runner_t * runner,
377 : void const * input_,
378 : void ** output_,
379 : void * output_buf,
380 0 : ulong output_bufsz ) {
381 0 : fd_exec_test_syscall_context_t const * input = fd_type_pun_const( input_ );
382 0 : fd_exec_test_syscall_effects_t ** output = fd_type_pun( output_ );
383 :
384 : /* Create execution context */
385 0 : const fd_exec_test_instr_context_t * input_instr_ctx = &input->instr_ctx;
386 0 : fd_exec_instr_ctx_t ctx[1];
387 : // Skip extra checks for non-CPI syscalls
388 0 : int is_cpi = !strncmp( (const char *)input->syscall_invocation.function_name.bytes, "sol_invoke_signed", 17 );
389 0 : int skip_extra_checks = !is_cpi;
390 :
391 0 : if( !fd_runtime_fuzz_instr_ctx_create( runner, ctx, input_instr_ctx, skip_extra_checks ) )
392 0 : goto error;
393 0 : fd_valloc_t valloc = fd_spad_virtual( runner->spad );
394 :
395 0 : ctx->txn_ctx->instr_trace[0].instr_info = (fd_instr_info_t *)ctx->instr;
396 0 : ctx->txn_ctx->instr_trace[0].stack_height = 1;
397 :
398 : /* Capture outputs */
399 0 : ulong output_end = (ulong)output_buf + output_bufsz;
400 0 : FD_SCRATCH_ALLOC_INIT( l, output_buf );
401 0 : fd_exec_test_syscall_effects_t * effects =
402 0 : FD_SCRATCH_ALLOC_APPEND( l, alignof(fd_exec_test_syscall_effects_t),
403 0 : sizeof (fd_exec_test_syscall_effects_t) );
404 0 : if( FD_UNLIKELY( _l > output_end ) ) {
405 0 : goto error;
406 0 : }
407 :
408 0 : if( input->vm_ctx.return_data.program_id && input->vm_ctx.return_data.program_id->size == sizeof(fd_pubkey_t) ) {
409 0 : fd_memcpy( ctx->txn_ctx->return_data.program_id.uc, input->vm_ctx.return_data.program_id->bytes, sizeof(fd_pubkey_t) );
410 0 : }
411 :
412 0 : if( input->vm_ctx.return_data.data && input->vm_ctx.return_data.data->size>0U ) {
413 0 : ctx->txn_ctx->return_data.len = input->vm_ctx.return_data.data->size;
414 0 : fd_memcpy( ctx->txn_ctx->return_data.data, input->vm_ctx.return_data.data->bytes, ctx->txn_ctx->return_data.len );
415 0 : }
416 :
417 0 : *effects = (fd_exec_test_syscall_effects_t) FD_EXEC_TEST_SYSCALL_EFFECTS_INIT_ZERO;
418 :
419 : /* Set up the VM instance */
420 0 : fd_sha256_t _sha[1];
421 0 : fd_sha256_t * sha = fd_sha256_join( fd_sha256_new( _sha ) );
422 0 : fd_sbpf_syscalls_t * syscalls = fd_sbpf_syscalls_new( fd_valloc_malloc( valloc, fd_sbpf_syscalls_align(), fd_sbpf_syscalls_footprint() ) );
423 0 : fd_vm_syscall_register_all( syscalls, 0 );
424 :
425 : /* Pull out the memory regions */
426 0 : if( !input->has_vm_ctx ) {
427 0 : goto error;
428 0 : }
429 :
430 0 : ulong rodata_sz = input->vm_ctx.rodata ? input->vm_ctx.rodata->size : 0UL;
431 0 : uchar * rodata = fd_valloc_malloc( valloc, 8UL, rodata_sz );
432 0 : if ( input->vm_ctx.rodata != NULL ) {
433 0 : fd_memcpy( rodata, input->vm_ctx.rodata->bytes, rodata_sz );
434 0 : }
435 :
436 0 : if( input->vm_ctx.heap_max > FD_VM_HEAP_MAX ) {
437 0 : goto error;
438 0 : }
439 :
440 0 : fd_vm_t * vm = fd_vm_join( fd_vm_new( fd_valloc_malloc( valloc, fd_vm_align(), fd_vm_footprint() ) ) );
441 0 : if ( !vm ) {
442 0 : goto error;
443 0 : }
444 :
445 : /* If the program ID account owner is the v1 BPF loader, then alignment is disabled (controlled by
446 : the `is_deprecated` flag) */
447 :
448 0 : ulong input_sz = 0UL;
449 0 : ulong pre_lens[256] = {0};
450 0 : fd_vm_input_region_t input_mem_regions[1000] = {0}; /* We can have a max of (3 * num accounts + 1) regions */
451 0 : fd_vm_acc_region_meta_t acc_region_metas[256] = {0}; /* instr acc idx to idx */
452 0 : uint input_mem_regions_cnt = 0U;
453 0 : int direct_mapping = FD_FEATURE_ACTIVE( ctx->txn_ctx->slot, &ctx->txn_ctx->features, bpf_account_data_direct_mapping );
454 0 : int mask_out_rent_epoch_in_vm_serialization = FD_FEATURE_ACTIVE( ctx->txn_ctx->slot, &ctx->txn_ctx->features, mask_out_rent_epoch_in_vm_serialization );
455 :
456 0 : uchar * input_ptr = NULL;
457 0 : uchar program_id_idx = ctx->instr->program_id;
458 0 : fd_txn_account_t * program_acc = &ctx->txn_ctx->accounts[program_id_idx];
459 0 : uchar is_deprecated = ( program_id_idx < ctx->txn_ctx->accounts_cnt ) &&
460 0 : ( !memcmp( program_acc->vt->get_owner( program_acc ), fd_solana_bpf_loader_deprecated_program_id.key, sizeof(fd_pubkey_t) ) );
461 :
462 : /* Push the instruction onto the stack. This may also modify the sysvar instructions account, if its present. */
463 0 : int stack_push_err = fd_instr_stack_push( ctx->txn_ctx, (fd_instr_info_t *)ctx->instr );
464 0 : if( FD_UNLIKELY( stack_push_err ) ) {
465 0 : FD_LOG_WARNING(( "instr stack push err" ));
466 0 : goto error;
467 0 : }
468 :
469 : /* Serialize accounts into input memory region. */
470 0 : int err = fd_bpf_loader_input_serialize_parameters( ctx,
471 0 : &input_sz,
472 0 : pre_lens,
473 0 : input_mem_regions,
474 0 : &input_mem_regions_cnt,
475 0 : acc_region_metas,
476 0 : direct_mapping,
477 0 : mask_out_rent_epoch_in_vm_serialization,
478 0 : is_deprecated,
479 0 : &input_ptr );
480 0 : if( FD_UNLIKELY( err ) ) {
481 0 : FD_LOG_WARNING(( "bpf loader input serialize parameters err" ));
482 0 : goto error;
483 0 : }
484 :
485 0 : fd_vm_init( vm,
486 0 : ctx,
487 0 : input->vm_ctx.heap_max,
488 0 : ctx->txn_ctx->compute_meter,
489 0 : rodata,
490 0 : rodata_sz,
491 0 : NULL, // TODO
492 0 : 0, // TODO
493 0 : 0, // TODO
494 0 : 0, // TODO, text_sz
495 0 : 0, // TODO
496 0 : NULL, // TODO
497 0 : TEST_VM_DEFAULT_SBPF_VERSION,
498 0 : syscalls,
499 0 : NULL, // TODO
500 0 : sha,
501 0 : input_mem_regions,
502 0 : input_mem_regions_cnt,
503 0 : acc_region_metas,
504 0 : is_deprecated,
505 0 : FD_FEATURE_ACTIVE( ctx->txn_ctx->slot, &ctx->txn_ctx->features, bpf_account_data_direct_mapping ),
506 0 : 0 /* dump_syscall_to_pb */ );
507 :
508 : // Override some execution state values from the syscall fuzzer input
509 : // This is so we can test if the syscall mutates any of these erroneously
510 0 : vm->reg[0] = input->vm_ctx.r0;
511 0 : vm->reg[1] = input->vm_ctx.r1;
512 0 : vm->reg[2] = input->vm_ctx.r2;
513 0 : vm->reg[3] = input->vm_ctx.r3;
514 0 : vm->reg[4] = input->vm_ctx.r4;
515 0 : vm->reg[5] = input->vm_ctx.r5;
516 0 : vm->reg[6] = input->vm_ctx.r6;
517 0 : vm->reg[7] = input->vm_ctx.r7;
518 0 : vm->reg[8] = input->vm_ctx.r8;
519 0 : vm->reg[9] = input->vm_ctx.r9;
520 0 : vm->reg[10] = input->vm_ctx.r10;
521 0 : vm->reg[11] = input->vm_ctx.r11;
522 :
523 : // Override initial part of the heap, if specified the syscall fuzzer input
524 0 : if( input->syscall_invocation.heap_prefix ) {
525 0 : fd_memcpy( vm->heap, input->syscall_invocation.heap_prefix->bytes,
526 0 : fd_ulong_min(input->syscall_invocation.heap_prefix->size, vm->heap_max) );
527 0 : }
528 :
529 : // Override initial part of the stack, if specified the syscall fuzzer input
530 0 : if( input->syscall_invocation.stack_prefix ) {
531 0 : fd_memcpy( vm->stack, input->syscall_invocation.stack_prefix->bytes,
532 0 : fd_ulong_min(input->syscall_invocation.stack_prefix->size, FD_VM_STACK_MAX) );
533 0 : }
534 :
535 : // Look up the syscall to execute
536 0 : char * syscall_name = (char *)input->syscall_invocation.function_name.bytes;
537 0 : fd_sbpf_syscalls_t const * syscall = fd_runtime_fuzz_lookup_syscall_func(syscalls, syscall_name, input->syscall_invocation.function_name.size);
538 0 : if( !syscall ) {
539 0 : goto error;
540 0 : }
541 :
542 : /* There's an instr ctx struct embedded in the txn ctx instr stack. */
543 0 : fd_exec_instr_ctx_t * instr_ctx = &ctx->txn_ctx->instr_stack[ ctx->txn_ctx->instr_stack_sz - 1 ];
544 0 : *instr_ctx = (fd_exec_instr_ctx_t) {
545 0 : .instr = ctx->instr,
546 0 : .txn_ctx = ctx->txn_ctx,
547 0 : .depth = 0U,
548 0 : };
549 :
550 : /* Actually invoke the syscall */
551 0 : int syscall_err = syscall->func( vm, vm->reg[1], vm->reg[2], vm->reg[3], vm->reg[4], vm->reg[5], &vm->reg[0] );
552 0 : int stack_pop_err = fd_instr_stack_pop( ctx->txn_ctx, ctx->instr );
553 0 : if( FD_UNLIKELY( stack_pop_err ) ) {
554 0 : FD_LOG_WARNING(( "instr stack pop err" ));
555 0 : goto error;
556 0 : }
557 0 : if( syscall_err ) {
558 0 : fd_log_collector_program_failure( vm->instr_ctx );
559 0 : }
560 :
561 : /* Capture the effects */
562 0 : int exec_err = vm->instr_ctx->txn_ctx->exec_err;
563 0 : effects->error = 0;
564 0 : if( syscall_err ) {
565 0 : if( exec_err==0 ) {
566 0 : FD_LOG_WARNING(( "TODO: syscall returns error, but exec_err not set. this is probably missing a log." ));
567 0 : effects->error = -1;
568 0 : } else {
569 0 : effects->error = (exec_err <= 0) ? -exec_err : -1;
570 :
571 : /* Map error kind, equivalent to:
572 : effects->error_kind = (fd_exec_test_err_kind_t)(vm->instr_ctx->txn_ctx->exec_err_kind); */
573 0 : switch (vm->instr_ctx->txn_ctx->exec_err_kind) {
574 0 : case FD_EXECUTOR_ERR_KIND_EBPF:
575 0 : effects->error_kind = FD_EXEC_TEST_ERR_KIND_EBPF;
576 0 : break;
577 0 : case FD_EXECUTOR_ERR_KIND_SYSCALL:
578 0 : effects->error_kind = FD_EXEC_TEST_ERR_KIND_SYSCALL;
579 0 : break;
580 0 : case FD_EXECUTOR_ERR_KIND_INSTR:
581 0 : effects->error_kind = FD_EXEC_TEST_ERR_KIND_INSTRUCTION;
582 0 : break;
583 0 : default:
584 0 : effects->error_kind = FD_EXEC_TEST_ERR_KIND_UNSPECIFIED;
585 0 : break;
586 0 : }
587 0 : }
588 0 : }
589 0 : effects->r0 = syscall_err ? 0 : vm->reg[0]; // Save only on success
590 0 : effects->cu_avail = (ulong)vm->cu;
591 :
592 0 : if( vm->heap_max ) {
593 0 : effects->heap = FD_SCRATCH_ALLOC_APPEND(
594 0 : l, alignof(uint), PB_BYTES_ARRAY_T_ALLOCSIZE( vm->heap_max ) );
595 0 : if( FD_UNLIKELY( _l > output_end ) ) {
596 0 : goto error;
597 0 : }
598 0 : effects->heap->size = (uint)vm->heap_max;
599 0 : fd_memcpy( effects->heap->bytes, vm->heap, vm->heap_max );
600 0 : } else {
601 0 : effects->heap = NULL;
602 0 : }
603 :
604 0 : effects->stack = FD_SCRATCH_ALLOC_APPEND(
605 0 : l, alignof(pb_bytes_array_t), PB_BYTES_ARRAY_T_ALLOCSIZE( FD_VM_STACK_MAX ) );
606 0 : if( FD_UNLIKELY( _l > output_end ) ) {
607 0 : goto error;
608 0 : }
609 0 : effects->stack->size = (uint)FD_VM_STACK_MAX;
610 0 : fd_memcpy( effects->stack->bytes, vm->stack, FD_VM_STACK_MAX );
611 :
612 0 : if( vm->rodata_sz ) {
613 0 : effects->rodata = FD_SCRATCH_ALLOC_APPEND(
614 0 : l, alignof(pb_bytes_array_t), PB_BYTES_ARRAY_T_ALLOCSIZE( rodata_sz ) );
615 0 : if( FD_UNLIKELY( _l > output_end ) ) {
616 0 : goto error;
617 0 : }
618 0 : effects->rodata->size = (uint)rodata_sz;
619 0 : fd_memcpy( effects->rodata->bytes, vm->rodata, rodata_sz );
620 0 : } else {
621 0 : effects->rodata = NULL;
622 0 : }
623 :
624 0 : effects->frame_count = vm->frame_cnt;
625 :
626 0 : fd_log_collector_t * log = &vm->instr_ctx->txn_ctx->log_collector;
627 : /* Only collect log on valid errors (i.e., != -1). Follows
628 : https://github.com/firedancer-io/solfuzz-agave/blob/99758d3c4f3a342d56e2906936458d82326ae9a8/src/utils/err_map.rs#L148 */
629 0 : if( effects->error != -1 && log->buf_sz ) {
630 0 : effects->log = FD_SCRATCH_ALLOC_APPEND(
631 0 : l, alignof(pb_bytes_array_t), PB_BYTES_ARRAY_T_ALLOCSIZE( log->buf_sz ) );
632 0 : if( FD_UNLIKELY( _l > output_end ) ) {
633 0 : goto error;
634 0 : }
635 0 : effects->log->size = (uint)fd_log_collector_debug_sprintf( log, (char *)effects->log->bytes, 0 );
636 0 : } else {
637 0 : effects->log = NULL;
638 0 : }
639 :
640 : /* Capture input regions */
641 0 : effects->inputdata = NULL; /* Deprecated, using input_data_regions instead */
642 0 : ulong tmp_end = FD_SCRATCH_ALLOC_FINI( l, 1UL );
643 0 : ulong input_regions_size = fd_runtime_fuzz_load_from_vm_input_regions( vm->input_mem_regions,
644 0 : vm->input_mem_regions_cnt,
645 0 : &effects->input_data_regions,
646 0 : &effects->input_data_regions_count,
647 0 : (void *)tmp_end,
648 0 : fd_ulong_sat_sub( output_end, tmp_end ) );
649 :
650 0 : if( !!vm->input_mem_regions_cnt && !effects->input_data_regions ) {
651 0 : goto error;
652 0 : }
653 :
654 : /* Return the effects */
655 0 : ulong actual_end = tmp_end + input_regions_size;
656 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, ctx );
657 :
658 0 : *output = effects;
659 0 : return actual_end - (ulong)output_buf;
660 :
661 0 : error:
662 0 : fd_runtime_fuzz_instr_ctx_destroy( runner, ctx );
663 0 : return 0;
664 0 : }
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