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freebsd
GitHub Repository: freebsd/freebsd-src
Path: blob/main/contrib/llvm-project/compiler-rt/lib/asan/asan_errors.cpp
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//===-- asan_errors.cpp -----------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// ASan implementation for error structures.
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//===----------------------------------------------------------------------===//
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#include "asan_errors.h"
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#include "asan_descriptions.h"
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#include "asan_mapping.h"
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#include "asan_report.h"
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#include "asan_stack.h"
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#include "sanitizer_common/sanitizer_stackdepot.h"
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namespace __asan {
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static void OnStackUnwind(const SignalContext &sig,
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const void *callback_context,
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BufferedStackTrace *stack) {
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bool fast = common_flags()->fast_unwind_on_fatal;
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#if SANITIZER_FREEBSD || SANITIZER_NETBSD
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// On FreeBSD the slow unwinding that leverages _Unwind_Backtrace()
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// yields the call stack of the signal's handler and not of the code
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// that raised the signal (as it does on Linux).
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fast = true;
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#endif
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// Tests and maybe some users expect that scariness is going to be printed
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// just before the stack. As only asan has scariness score we have no
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// corresponding code in the sanitizer_common and we use this callback to
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// print it.
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static_cast<const ScarinessScoreBase *>(callback_context)->Print();
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stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context,
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fast);
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}
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void ErrorDeadlySignal::Print() {
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ReportDeadlySignal(signal, tid, &OnStackUnwind, &scariness);
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}
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void ErrorDoubleFree::Print() {
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Decorator d;
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Printf("%s", d.Error());
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Report("ERROR: AddressSanitizer: attempting %s on %p in thread %s:\n",
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scariness.GetDescription(), (void *)addr_description.addr,
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AsanThreadIdAndName(tid).c_str());
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Printf("%s", d.Default());
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scariness.Print();
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GET_STACK_TRACE_FATAL(second_free_stack->trace[0],
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second_free_stack->top_frame_bp);
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stack.Print();
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addr_description.Print();
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ReportErrorSummary(scariness.GetDescription(), &stack);
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}
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void ErrorNewDeleteTypeMismatch::Print() {
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Decorator d;
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Printf("%s", d.Error());
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Report("ERROR: AddressSanitizer: %s on %p in thread %s:\n",
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scariness.GetDescription(), (void *)addr_description.addr,
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AsanThreadIdAndName(tid).c_str());
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Printf("%s object passed to delete has wrong type:\n", d.Default());
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if (delete_size != 0) {
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Printf(
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" size of the allocated type: %zd bytes;\n"
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" size of the deallocated type: %zd bytes.\n",
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addr_description.chunk_access.chunk_size, delete_size);
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}
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const uptr user_alignment =
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addr_description.chunk_access.user_requested_alignment;
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if (delete_alignment != user_alignment) {
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char user_alignment_str[32];
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char delete_alignment_str[32];
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internal_snprintf(user_alignment_str, sizeof(user_alignment_str),
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"%zd bytes", user_alignment);
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internal_snprintf(delete_alignment_str, sizeof(delete_alignment_str),
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"%zd bytes", delete_alignment);
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static const char *kDefaultAlignment = "default-aligned";
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Printf(
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" alignment of the allocated type: %s;\n"
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" alignment of the deallocated type: %s.\n",
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user_alignment > 0 ? user_alignment_str : kDefaultAlignment,
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delete_alignment > 0 ? delete_alignment_str : kDefaultAlignment);
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}
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CHECK_GT(free_stack->size, 0);
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scariness.Print();
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GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
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stack.Print();
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addr_description.Print();
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ReportErrorSummary(scariness.GetDescription(), &stack);
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Report(
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"HINT: if you don't care about these errors you may set "
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"ASAN_OPTIONS=new_delete_type_mismatch=0\n");
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}
100
101
void ErrorFreeNotMalloced::Print() {
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Decorator d;
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Printf("%s", d.Error());
104
Report(
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"ERROR: AddressSanitizer: attempting free on address "
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"which was not malloc()-ed: %p in thread %s\n",
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(void *)addr_description.Address(), AsanThreadIdAndName(tid).c_str());
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Printf("%s", d.Default());
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CHECK_GT(free_stack->size, 0);
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scariness.Print();
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GET_STACK_TRACE_FATAL(free_stack->trace[0], free_stack->top_frame_bp);
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stack.Print();
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addr_description.Print();
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ReportErrorSummary(scariness.GetDescription(), &stack);
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}
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void ErrorAllocTypeMismatch::Print() {
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static const char *alloc_names[] = {"INVALID", "malloc", "operator new",
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"operator new []"};
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static const char *dealloc_names[] = {"INVALID", "free", "operator delete",
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"operator delete []"};
122
CHECK_NE(alloc_type, dealloc_type);
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Decorator d;
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Printf("%s", d.Error());
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Report("ERROR: AddressSanitizer: %s (%s vs %s) on %p\n",
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scariness.GetDescription(), alloc_names[alloc_type],
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dealloc_names[dealloc_type], (void *)addr_description.Address());
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Printf("%s", d.Default());
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CHECK_GT(dealloc_stack->size, 0);
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scariness.Print();
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GET_STACK_TRACE_FATAL(dealloc_stack->trace[0], dealloc_stack->top_frame_bp);
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stack.Print();
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addr_description.Print();
134
ReportErrorSummary(scariness.GetDescription(), &stack);
135
Report(
136
"HINT: if you don't care about these errors you may set "
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"ASAN_OPTIONS=alloc_dealloc_mismatch=0\n");
138
}
139
140
void ErrorMallocUsableSizeNotOwned::Print() {
141
Decorator d;
142
Printf("%s", d.Error());
143
Report(
144
"ERROR: AddressSanitizer: attempting to call malloc_usable_size() for "
145
"pointer which is not owned: %p\n",
146
(void *)addr_description.Address());
147
Printf("%s", d.Default());
148
stack->Print();
149
addr_description.Print();
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ReportErrorSummary(scariness.GetDescription(), stack);
151
}
152
153
void ErrorSanitizerGetAllocatedSizeNotOwned::Print() {
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Decorator d;
155
Printf("%s", d.Error());
156
Report(
157
"ERROR: AddressSanitizer: attempting to call "
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"__sanitizer_get_allocated_size() for pointer which is not owned: %p\n",
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(void *)addr_description.Address());
160
Printf("%s", d.Default());
161
stack->Print();
162
addr_description.Print();
163
ReportErrorSummary(scariness.GetDescription(), stack);
164
}
165
166
void ErrorCallocOverflow::Print() {
167
Decorator d;
168
Printf("%s", d.Error());
169
Report(
170
"ERROR: AddressSanitizer: calloc parameters overflow: count * size "
171
"(%zd * %zd) cannot be represented in type size_t (thread %s)\n",
172
count, size, AsanThreadIdAndName(tid).c_str());
173
Printf("%s", d.Default());
174
stack->Print();
175
PrintHintAllocatorCannotReturnNull();
176
ReportErrorSummary(scariness.GetDescription(), stack);
177
}
178
179
void ErrorReallocArrayOverflow::Print() {
180
Decorator d;
181
Printf("%s", d.Error());
182
Report(
183
"ERROR: AddressSanitizer: reallocarray parameters overflow: count * size "
184
"(%zd * %zd) cannot be represented in type size_t (thread %s)\n",
185
count, size, AsanThreadIdAndName(tid).c_str());
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Printf("%s", d.Default());
187
stack->Print();
188
PrintHintAllocatorCannotReturnNull();
189
ReportErrorSummary(scariness.GetDescription(), stack);
190
}
191
192
void ErrorPvallocOverflow::Print() {
193
Decorator d;
194
Printf("%s", d.Error());
195
Report(
196
"ERROR: AddressSanitizer: pvalloc parameters overflow: size 0x%zx "
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"rounded up to system page size 0x%zx cannot be represented in type "
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"size_t (thread %s)\n",
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size, GetPageSizeCached(), AsanThreadIdAndName(tid).c_str());
200
Printf("%s", d.Default());
201
stack->Print();
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PrintHintAllocatorCannotReturnNull();
203
ReportErrorSummary(scariness.GetDescription(), stack);
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}
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206
void ErrorInvalidAllocationAlignment::Print() {
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Decorator d;
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Printf("%s", d.Error());
209
Report(
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"ERROR: AddressSanitizer: invalid allocation alignment: %zd, "
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"alignment must be a power of two (thread %s)\n",
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alignment, AsanThreadIdAndName(tid).c_str());
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Printf("%s", d.Default());
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stack->Print();
215
PrintHintAllocatorCannotReturnNull();
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ReportErrorSummary(scariness.GetDescription(), stack);
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}
218
219
void ErrorInvalidAlignedAllocAlignment::Print() {
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Decorator d;
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Printf("%s", d.Error());
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#if SANITIZER_POSIX
223
Report("ERROR: AddressSanitizer: invalid alignment requested in "
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"aligned_alloc: %zd, alignment must be a power of two and the "
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"requested size 0x%zx must be a multiple of alignment "
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"(thread %s)\n", alignment, size, AsanThreadIdAndName(tid).c_str());
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#else
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Report("ERROR: AddressSanitizer: invalid alignment requested in "
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"aligned_alloc: %zd, the requested size 0x%zx must be a multiple of "
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"alignment (thread %s)\n", alignment, size,
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AsanThreadIdAndName(tid).c_str());
232
#endif
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Printf("%s", d.Default());
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stack->Print();
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PrintHintAllocatorCannotReturnNull();
236
ReportErrorSummary(scariness.GetDescription(), stack);
237
}
238
239
void ErrorInvalidPosixMemalignAlignment::Print() {
240
Decorator d;
241
Printf("%s", d.Error());
242
Report(
243
"ERROR: AddressSanitizer: invalid alignment requested in posix_memalign: "
244
"%zd, alignment must be a power of two and a multiple of sizeof(void*) "
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"== %zd (thread %s)\n",
246
alignment, sizeof(void *), AsanThreadIdAndName(tid).c_str());
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Printf("%s", d.Default());
248
stack->Print();
249
PrintHintAllocatorCannotReturnNull();
250
ReportErrorSummary(scariness.GetDescription(), stack);
251
}
252
253
void ErrorAllocationSizeTooBig::Print() {
254
Decorator d;
255
Printf("%s", d.Error());
256
Report(
257
"ERROR: AddressSanitizer: requested allocation size 0x%zx (0x%zx after "
258
"adjustments for alignment, red zones etc.) exceeds maximum supported "
259
"size of 0x%zx (thread %s)\n",
260
user_size, total_size, max_size, AsanThreadIdAndName(tid).c_str());
261
Printf("%s", d.Default());
262
stack->Print();
263
PrintHintAllocatorCannotReturnNull();
264
ReportErrorSummary(scariness.GetDescription(), stack);
265
}
266
267
void ErrorRssLimitExceeded::Print() {
268
Decorator d;
269
Printf("%s", d.Error());
270
Report(
271
"ERROR: AddressSanitizer: specified RSS limit exceeded, currently set to "
272
"soft_rss_limit_mb=%zd\n", common_flags()->soft_rss_limit_mb);
273
Printf("%s", d.Default());
274
stack->Print();
275
PrintHintAllocatorCannotReturnNull();
276
ReportErrorSummary(scariness.GetDescription(), stack);
277
}
278
279
void ErrorOutOfMemory::Print() {
280
Decorator d;
281
Printf("%s", d.Error());
282
ERROR_OOM("allocator is trying to allocate 0x%zx bytes\n", requested_size);
283
Printf("%s", d.Default());
284
stack->Print();
285
PrintHintAllocatorCannotReturnNull();
286
ReportErrorSummary(scariness.GetDescription(), stack);
287
}
288
289
void ErrorStringFunctionMemoryRangesOverlap::Print() {
290
Decorator d;
291
char bug_type[100];
292
internal_snprintf(bug_type, sizeof(bug_type), "%s-param-overlap", function);
293
Printf("%s", d.Error());
294
Report(
295
"ERROR: AddressSanitizer: %s: memory ranges [%p,%p) and [%p, %p) "
296
"overlap\n",
297
bug_type, (void *)addr1_description.Address(),
298
(void *)(addr1_description.Address() + length1),
299
(void *)addr2_description.Address(),
300
(void *)(addr2_description.Address() + length2));
301
Printf("%s", d.Default());
302
scariness.Print();
303
stack->Print();
304
addr1_description.Print();
305
addr2_description.Print();
306
ReportErrorSummary(bug_type, stack);
307
}
308
309
void ErrorStringFunctionSizeOverflow::Print() {
310
Decorator d;
311
Printf("%s", d.Error());
312
Report("ERROR: AddressSanitizer: %s: (size=%zd)\n",
313
scariness.GetDescription(), size);
314
Printf("%s", d.Default());
315
scariness.Print();
316
stack->Print();
317
addr_description.Print();
318
ReportErrorSummary(scariness.GetDescription(), stack);
319
}
320
321
void ErrorBadParamsToAnnotateContiguousContainer::Print() {
322
Report(
323
"ERROR: AddressSanitizer: bad parameters to "
324
"__sanitizer_annotate_contiguous_container:\n"
325
" beg : %p\n"
326
" end : %p\n"
327
" old_mid : %p\n"
328
" new_mid : %p\n",
329
(void *)beg, (void *)end, (void *)old_mid, (void *)new_mid);
330
uptr granularity = ASAN_SHADOW_GRANULARITY;
331
if (!IsAligned(beg, granularity))
332
Report("ERROR: beg is not aligned by %zu\n", granularity);
333
stack->Print();
334
ReportErrorSummary(scariness.GetDescription(), stack);
335
}
336
337
void ErrorBadParamsToAnnotateDoubleEndedContiguousContainer::Print() {
338
Report(
339
"ERROR: AddressSanitizer: bad parameters to "
340
"__sanitizer_annotate_double_ended_contiguous_container:\n"
341
" storage_beg : %p\n"
342
" storage_end : %p\n"
343
" old_container_beg : %p\n"
344
" old_container_end : %p\n"
345
" new_container_beg : %p\n"
346
" new_container_end : %p\n",
347
(void *)storage_beg, (void *)storage_end, (void *)old_container_beg,
348
(void *)old_container_end, (void *)new_container_beg,
349
(void *)new_container_end);
350
uptr granularity = ASAN_SHADOW_GRANULARITY;
351
if (!IsAligned(storage_beg, granularity))
352
Report("ERROR: storage_beg is not aligned by %zu\n", granularity);
353
stack->Print();
354
ReportErrorSummary(scariness.GetDescription(), stack);
355
}
356
357
void ErrorODRViolation::Print() {
358
Decorator d;
359
Printf("%s", d.Error());
360
Report("ERROR: AddressSanitizer: %s (%p):\n", scariness.GetDescription(),
361
(void *)global1.beg);
362
Printf("%s", d.Default());
363
InternalScopedString g1_loc;
364
InternalScopedString g2_loc;
365
PrintGlobalLocation(&g1_loc, global1, /*print_module_name=*/true);
366
PrintGlobalLocation(&g2_loc, global2, /*print_module_name=*/true);
367
Printf(" [1] size=%zd '%s' %s\n", global1.size,
368
MaybeDemangleGlobalName(global1.name), g1_loc.data());
369
Printf(" [2] size=%zd '%s' %s\n", global2.size,
370
MaybeDemangleGlobalName(global2.name), g2_loc.data());
371
if (stack_id1 && stack_id2) {
372
Printf("These globals were registered at these points:\n");
373
Printf(" [1]:\n");
374
StackDepotGet(stack_id1).Print();
375
Printf(" [2]:\n");
376
StackDepotGet(stack_id2).Print();
377
}
378
Report(
379
"HINT: if you don't care about these errors you may set "
380
"ASAN_OPTIONS=detect_odr_violation=0\n");
381
InternalScopedString error_msg;
382
error_msg.AppendF("%s: global '%s' at %s", scariness.GetDescription(),
383
MaybeDemangleGlobalName(global1.name), g1_loc.data());
384
ReportErrorSummary(error_msg.data());
385
}
386
387
void ErrorInvalidPointerPair::Print() {
388
Decorator d;
389
Printf("%s", d.Error());
390
Report("ERROR: AddressSanitizer: %s: %p %p\n", scariness.GetDescription(),
391
(void *)addr1_description.Address(),
392
(void *)addr2_description.Address());
393
Printf("%s", d.Default());
394
GET_STACK_TRACE_FATAL(pc, bp);
395
stack.Print();
396
addr1_description.Print();
397
addr2_description.Print();
398
ReportErrorSummary(scariness.GetDescription(), &stack);
399
}
400
401
static bool AdjacentShadowValuesAreFullyPoisoned(u8 *s) {
402
return s[-1] > 127 && s[1] > 127;
403
}
404
405
ErrorGeneric::ErrorGeneric(u32 tid, uptr pc_, uptr bp_, uptr sp_, uptr addr,
406
bool is_write_, uptr access_size_)
407
: ErrorBase(tid),
408
addr_description(addr, access_size_, /*shouldLockThreadRegistry=*/false),
409
pc(pc_),
410
bp(bp_),
411
sp(sp_),
412
access_size(access_size_),
413
is_write(is_write_),
414
shadow_val(0) {
415
scariness.Clear();
416
if (access_size) {
417
if (access_size <= 9) {
418
char desr[] = "?-byte";
419
desr[0] = '0' + access_size;
420
scariness.Scare(access_size + access_size / 2, desr);
421
} else if (access_size >= 10) {
422
scariness.Scare(15, "multi-byte");
423
}
424
is_write ? scariness.Scare(20, "write") : scariness.Scare(1, "read");
425
426
// Determine the error type.
427
bug_descr = "unknown-crash";
428
if (AddrIsInMem(addr)) {
429
u8 *shadow_addr = (u8 *)MemToShadow(addr);
430
// If we are accessing 16 bytes, look at the second shadow byte.
431
if (*shadow_addr == 0 && access_size > ASAN_SHADOW_GRANULARITY)
432
shadow_addr++;
433
// If we are in the partial right redzone, look at the next shadow byte.
434
if (*shadow_addr > 0 && *shadow_addr < 128) shadow_addr++;
435
bool far_from_bounds = false;
436
shadow_val = *shadow_addr;
437
int bug_type_score = 0;
438
// For use-after-frees reads are almost as bad as writes.
439
int read_after_free_bonus = 0;
440
switch (shadow_val) {
441
case kAsanHeapLeftRedzoneMagic:
442
case kAsanArrayCookieMagic:
443
bug_descr = "heap-buffer-overflow";
444
bug_type_score = 10;
445
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
446
break;
447
case kAsanHeapFreeMagic:
448
bug_descr = "heap-use-after-free";
449
bug_type_score = 20;
450
if (!is_write) read_after_free_bonus = 18;
451
break;
452
case kAsanStackLeftRedzoneMagic:
453
bug_descr = "stack-buffer-underflow";
454
bug_type_score = 25;
455
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
456
break;
457
case kAsanInitializationOrderMagic:
458
bug_descr = "initialization-order-fiasco";
459
bug_type_score = 1;
460
break;
461
case kAsanStackMidRedzoneMagic:
462
case kAsanStackRightRedzoneMagic:
463
bug_descr = "stack-buffer-overflow";
464
bug_type_score = 25;
465
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
466
break;
467
case kAsanStackAfterReturnMagic:
468
bug_descr = "stack-use-after-return";
469
bug_type_score = 30;
470
if (!is_write) read_after_free_bonus = 18;
471
break;
472
case kAsanUserPoisonedMemoryMagic:
473
bug_descr = "use-after-poison";
474
bug_type_score = 20;
475
break;
476
case kAsanContiguousContainerOOBMagic:
477
bug_descr = "container-overflow";
478
bug_type_score = 10;
479
break;
480
case kAsanStackUseAfterScopeMagic:
481
bug_descr = "stack-use-after-scope";
482
bug_type_score = 10;
483
break;
484
case kAsanGlobalRedzoneMagic:
485
bug_descr = "global-buffer-overflow";
486
bug_type_score = 10;
487
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
488
break;
489
case kAsanIntraObjectRedzone:
490
bug_descr = "intra-object-overflow";
491
bug_type_score = 10;
492
break;
493
case kAsanAllocaLeftMagic:
494
case kAsanAllocaRightMagic:
495
bug_descr = "dynamic-stack-buffer-overflow";
496
bug_type_score = 25;
497
far_from_bounds = AdjacentShadowValuesAreFullyPoisoned(shadow_addr);
498
break;
499
}
500
scariness.Scare(bug_type_score + read_after_free_bonus, bug_descr);
501
if (far_from_bounds) scariness.Scare(10, "far-from-bounds");
502
}
503
}
504
}
505
506
static void PrintContainerOverflowHint() {
507
Printf("HINT: if you don't care about these errors you may set "
508
"ASAN_OPTIONS=detect_container_overflow=0.\n"
509
"If you suspect a false positive see also: "
510
"https://github.com/google/sanitizers/wiki/"
511
"AddressSanitizerContainerOverflow.\n");
512
}
513
514
static void PrintShadowByte(InternalScopedString *str, const char *before,
515
u8 byte, const char *after = "\n") {
516
PrintMemoryByte(str, before, byte, /*in_shadow*/true, after);
517
}
518
519
static void PrintLegend(InternalScopedString *str) {
520
str->AppendF(
521
"Shadow byte legend (one shadow byte represents %d "
522
"application bytes):\n",
523
(int)ASAN_SHADOW_GRANULARITY);
524
PrintShadowByte(str, " Addressable: ", 0);
525
str->AppendF(" Partially addressable: ");
526
for (u8 i = 1; i < ASAN_SHADOW_GRANULARITY; i++)
527
PrintShadowByte(str, "", i, " ");
528
str->AppendF("\n");
529
PrintShadowByte(str, " Heap left redzone: ",
530
kAsanHeapLeftRedzoneMagic);
531
PrintShadowByte(str, " Freed heap region: ", kAsanHeapFreeMagic);
532
PrintShadowByte(str, " Stack left redzone: ",
533
kAsanStackLeftRedzoneMagic);
534
PrintShadowByte(str, " Stack mid redzone: ",
535
kAsanStackMidRedzoneMagic);
536
PrintShadowByte(str, " Stack right redzone: ",
537
kAsanStackRightRedzoneMagic);
538
PrintShadowByte(str, " Stack after return: ",
539
kAsanStackAfterReturnMagic);
540
PrintShadowByte(str, " Stack use after scope: ",
541
kAsanStackUseAfterScopeMagic);
542
PrintShadowByte(str, " Global redzone: ", kAsanGlobalRedzoneMagic);
543
PrintShadowByte(str, " Global init order: ",
544
kAsanInitializationOrderMagic);
545
PrintShadowByte(str, " Poisoned by user: ",
546
kAsanUserPoisonedMemoryMagic);
547
PrintShadowByte(str, " Container overflow: ",
548
kAsanContiguousContainerOOBMagic);
549
PrintShadowByte(str, " Array cookie: ",
550
kAsanArrayCookieMagic);
551
PrintShadowByte(str, " Intra object redzone: ",
552
kAsanIntraObjectRedzone);
553
PrintShadowByte(str, " ASan internal: ", kAsanInternalHeapMagic);
554
PrintShadowByte(str, " Left alloca redzone: ", kAsanAllocaLeftMagic);
555
PrintShadowByte(str, " Right alloca redzone: ", kAsanAllocaRightMagic);
556
}
557
558
static void PrintShadowBytes(InternalScopedString *str, const char *before,
559
u8 *bytes, u8 *guilty, uptr n) {
560
Decorator d;
561
if (before)
562
str->AppendF("%s%p:", before,
563
(void *)ShadowToMem(reinterpret_cast<uptr>(bytes)));
564
for (uptr i = 0; i < n; i++) {
565
u8 *p = bytes + i;
566
const char *before =
567
p == guilty ? "[" : (p - 1 == guilty && i != 0) ? "" : " ";
568
const char *after = p == guilty ? "]" : "";
569
PrintShadowByte(str, before, *p, after);
570
}
571
str->AppendF("\n");
572
}
573
574
static void PrintShadowMemoryForAddress(uptr addr) {
575
if (!AddrIsInMem(addr)) return;
576
uptr shadow_addr = MemToShadow(addr);
577
const uptr n_bytes_per_row = 16;
578
uptr aligned_shadow = shadow_addr & ~(n_bytes_per_row - 1);
579
InternalScopedString str;
580
str.AppendF("Shadow bytes around the buggy address:\n");
581
for (int i = -5; i <= 5; i++) {
582
uptr row_shadow_addr = aligned_shadow + i * n_bytes_per_row;
583
// Skip rows that would be outside the shadow range. This can happen when
584
// the user address is near the bottom, top, or shadow gap of the address
585
// space.
586
if (!AddrIsInShadow(row_shadow_addr)) continue;
587
const char *prefix = (i == 0) ? "=>" : " ";
588
PrintShadowBytes(&str, prefix, (u8 *)row_shadow_addr, (u8 *)shadow_addr,
589
n_bytes_per_row);
590
}
591
if (flags()->print_legend) PrintLegend(&str);
592
Printf("%s", str.data());
593
}
594
595
void ErrorGeneric::Print() {
596
Decorator d;
597
Printf("%s", d.Error());
598
uptr addr = addr_description.Address();
599
Report("ERROR: AddressSanitizer: %s on address %p at pc %p bp %p sp %p\n",
600
bug_descr, (void *)addr, (void *)pc, (void *)bp, (void *)sp);
601
Printf("%s", d.Default());
602
603
Printf("%s%s of size %zu at %p thread %s%s\n", d.Access(),
604
access_size ? (is_write ? "WRITE" : "READ") : "ACCESS", access_size,
605
(void *)addr, AsanThreadIdAndName(tid).c_str(), d.Default());
606
607
scariness.Print();
608
GET_STACK_TRACE_FATAL(pc, bp);
609
stack.Print();
610
611
// Pass bug_descr because we have a special case for
612
// initialization-order-fiasco
613
addr_description.Print(bug_descr);
614
if (shadow_val == kAsanContiguousContainerOOBMagic)
615
PrintContainerOverflowHint();
616
ReportErrorSummary(bug_descr, &stack);
617
PrintShadowMemoryForAddress(addr);
618
}
619
620
} // namespace __asan
621
622