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Environment
- Pythonnet version: 3.0.0.dev1
- Python version: 3.9.9
- Operating System: Kali Linux
- .NET Runtime:
mono-complete:amd64/kali-rolling 6.8.0.105+dfsg-3.2 uptodate
mono-devel:all/kali-rolling 6.8.0.105+dfsg-3.2
Details
This example causes segfault before python shutdown:
import clrfrom System import IntPtra = clr.GetClrType(IntPtr)Actually no matter what type is imported (IntPtr, Console, etc.) - crashing anyway. However, crash happen exactly after the program finished its executing and only when NO debugging.
gef➤ bt#0 0x0000000040071c50 in ?? ()#1 0x0000000000508a13 in _Py_Dealloc (op=<optimized out>) at ../Objects/object.c:2209#2 _Py_DECREF (op=<optimized out>) at ../Include/object.h:430#3 _Py_XDECREF (op=<optimized out>) at ../Include/object.h:497#4 free_keys_object (keys=0x11ac070) at ../Objects/dictobject.c:598#5 0x0000000000508824 in dictkeys_decref (dk=<optimized out>) at ../Objects/dictobject.c:333#6 dict_dealloc (mp=0x7ffff78671c0) at ../Objects/dictobject.c:2026#7 0x00000000005a9f60 in _Py_DECREF (op=<optimized out>) at ../Include/object.h:430#8 _Py_XDECREF (op=<optimized out>) at ../Include/object.h:497#9 module_dealloc (m=0x7ffff7863cc0) at ../Objects/moduleobject.c:677#10 0x00000000004f9749 in _Py_Dealloc (op=<optimized out>) at ../Objects/object.c:2209#11 _Py_DECREF (op=<optimized out>) at ../Include/object.h:430#12 _Py_XDECREF (op=<optimized out>) at ../Include/object.h:497#13 insertdict (mp=<optimized out>, key='__main__', hash=<optimized out>, value=<optimized out>) at ../Objects/dictobject.c:1123#14 0x00000000006294a0 in _PyImport_Cleanup (tstate=0x94e6e0) at ../Python/import.c:526#15 0x000000000062732f in Py_FinalizeEx () at ../Python/pylifecycle.c:1426#16 0x000000000061e0c0 in Py_RunMain () at ../Modules/main.c:679#17 0x0000000000606199 in Py_BytesMain (argc=<optimized out>, argv=<optimized out>) at ../Modules/main.c:731#18 0x00007ffff7c427ed in __libc_start_main (main=0x606160 <main>, argc=0x2, argv=0x7fffffffde18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffde08) at ../csu/libc-start.c:332#19 0x000000000060609a in _start ()gef➤ xinfo 0x0000000040071c50[*] Cannot reach 0x40071c50 in memory spacegef➤ xinfo 0x0000000000508a13Page: 0x000000000041f000 → 0x0000000000690000 (size=0x271000)Permissions: r-xPathname: /usr/bin/python3.9Offset (from page): 0xe9a13Inode: 6816263Segment: .text (0x0000000000420e70-0x000000000068fe11)Offset (from segment): 0xe7ba3Symbol: free_keys_object.lto_priv+115If we add at the end of the script this line, then everything works like a charm:
Environment.Exit(0)Also works well if we clear variable at the end:
a = NoneMetadata
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