https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102217
Jonathan Wakely <redi at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |ice-on-valid-code Last reconfirmed| |2022-11-02 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> --- ================================================================= ==624580==ERROR: AddressSanitizer: heap-use-after-free on address 0x606000000028 at pc 0x0000004042b1 bp 0x7ffe18357490 sp 0x7ffe18357488 READ of size 8 at 0x606000000028 thread T0 #0 0x4042b0 in std::__n4861::coroutine_handle<Co::promise<Foo, Co::Task<Foo> > >::destroy() const /home/jwakely/gcc/12.1.0/include/c++/12.1.0/coroutine:246 #1 0x403cb7 in Co::UniqueHandle<Co::promise<Foo, Co::Task<Foo> > >::~UniqueHandle() /tmp/cocrash.cxx:37 #2 0x403767 in Co::Task<Foo>::~Task() /tmp/cocrash.cxx:135 #3 0x402a47 in FooC /tmp/cocrash.cxx:171 #4 0x4018c2 in FooA /tmp/cocrash.cxx:160 #5 0x402c11 in FooC /tmp/cocrash.cxx:168 #6 0x403501 in std::__n4861::coroutine_handle<void>::resume() const /home/jwakely/gcc/12.1.0/include/c++/12.1.0/coroutine:135 #7 0x402f84 in main /tmp/cocrash.cxx:177 #8 0x7f66323e750f in __libc_start_call_main (/lib64/libc.so.6+0x2950f) #9 0x7f66323e75c8 in __libc_start_main_impl (/lib64/libc.so.6+0x295c8) #10 0x4011b4 in _start (/tmp/a.out+0x4011b4) 0x606000000028 is located 8 bytes inside of 56-byte region [0x606000000020,0x606000000058) freed by thread T0 here: #0 0x7f66329bcbb8 in operator delete(void*) ../../../../gcc-12.1.0/libsanitizer/asan/asan_new_delete.cpp:152 #1 0x401981 in FooA /tmp/cocrash.cxx:162 #2 0x401a38 in FooA /tmp/cocrash.cxx:160 #3 0x4042b9 in std::__n4861::coroutine_handle<Co::promise<Foo, Co::Task<Foo> > >::destroy() const /home/jwakely/gcc/12.1.0/include/c++/12.1.0/coroutine:246 #4 0x403cb7 in Co::UniqueHandle<Co::promise<Foo, Co::Task<Foo> > >::~UniqueHandle() /tmp/cocrash.cxx:37 #5 0x403767 in Co::Task<Foo>::~Task() /tmp/cocrash.cxx:135 #6 0x4029ff in FooC /tmp/cocrash.cxx:171 #7 0x4018c2 in FooA /tmp/cocrash.cxx:160 #8 0x402c11 in FooC /tmp/cocrash.cxx:168 #9 0x403501 in std::__n4861::coroutine_handle<void>::resume() const /home/jwakely/gcc/12.1.0/include/c++/12.1.0/coroutine:135 #10 0x402f84 in main /tmp/cocrash.cxx:177 #11 0x7f66323e750f in __libc_start_call_main (/lib64/libc.so.6+0x2950f) previously allocated by thread T0 here: #0 0x7f66329bc178 in operator new(unsigned long) ../../../../gcc-12.1.0/libsanitizer/asan/asan_new_delete.cpp:95 #1 0x40129f in FooA() /tmp/cocrash.cxx:162 #2 0x4027c2 in FooC /tmp/cocrash.cxx:171 #3 0x403501 in std::__n4861::coroutine_handle<void>::resume() const /home/jwakely/gcc/12.1.0/include/c++/12.1.0/coroutine:135 #4 0x402f84 in main /tmp/cocrash.cxx:177 #5 0x7f66323e750f in __libc_start_call_main (/lib64/libc.so.6+0x2950f) SUMMARY: AddressSanitizer: heap-use-after-free /home/jwakely/gcc/12.1.0/include/c++/12.1.0/coroutine:246 in std::__n4861::coroutine_handle<Co::promise<Foo, Co::Task<Foo> > >::destroy() const Shadow bytes around the buggy address: 0x0c0c7fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c0c7fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c0c7fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c0c7fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x0c0c7fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x0c0c7fff8000: fa fa fa fa fd[fd]fd fd fd fd fd fa fa fa fa fa 0x0c0c7fff8010: fd fd fd fd fd fd fd fa fa fa fa fa fa fa fa fa 0x0c0c7fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c0c7fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c0c7fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c0c7fff8050: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb ==624580==ABORTING