Attached testing results of gdb and valgrind. (No error is reported for locale.dgettext('abs'*10,''))


$gdb ./python
(gdb) run
>>> locale.dgettext('abs'*10000000,'')

Program received signal SIGSEGV, Segmentation fault.
__dcigettext (
    domainname=domainname@entry=0xadb030 "absabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsabsab"..., msgid1=msgid1@entry=0x7ffff7fc09a0 "", msgid2=msgid2@entry=0x0, 
    plural=plural@entry=0, n=n@entry=0, category=category@entry=5) at dcigettext.c:675
675	dcigettext.c: No such file or directory.
(gdb)


valgrind
~$ PYTHONMALLOC=malloc_debug valgrind python
Memcheck, a memory error detector
==4870== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==4870== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==4870== Command: /home/xxm/Desktop/apifuzz/Python-3.10.0a6/python
==4870== 
Python 3.10.0a6 (default, Mar 19 2021, 11:45:56) [GCC 7.5.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> locale.dgettext('abs'*10000000,'')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'locale' is not defined
>>> import locale
>>> locale.dgettext('abs'*10000000,'')
==4870== Warning: client switching stacks?  SP change: 0x1ffefff5c0 --> 0x1ffd363220
==4870==          to suppress, use: --max-stackframe=30000032 or greater
==4870== Invalid write of size 8
==4870==    at 0x5797E88: __dcigettext (dcigettext.c:675)
==4870==  Address 0x1ffd363218 is on thread 1's stack
==4870== 
==4870== 
==4870== Process terminating with default action of signal 11 (SIGSEGV)
==4870==  Access not within mapped region at address 0x1FFD363218
==4870==    at 0x5797E88: __dcigettext (dcigettext.c:675)
==4870==  If you believe this happened as a result of a stack
==4870==  overflow in your program's main thread (unlikely but
==4870==  possible), you can try to increase the size of the
==4870==  main thread stack using the --main-stacksize= flag.
==4870==  The main thread stack size used in this run was 8388608.
==4870== Invalid write of size 8
==4870==    at 0x4A2867A: _vgnU_freeres (vg_preloaded.c:57)
==4870==  Address 0x1ffd363210 is on thread 1's stack
==4870== 
==4870== 
==4870== Process terminating with default action of signal 11 (SIGSEGV)
==4870==  Access not within mapped region at address 0x1FFD363210
==4870==    at 0x4A2867A: _vgnU_freeres (vg_preloaded.c:57)
==4870==  If you believe this happened as a result of a stack
==4870==  overflow in your program's main thread (unlikely but
==4870==  possible), you can try to increase the size of the
==4870==  main thread stack using the --main-stacksize= flag.
==4870==  The main thread stack size used in this run was 8388608.
==4870== 
==4870== HEAP SUMMARY:
==4870==     in use at exit: 35,310,749 bytes in 35,706 blocks
==4870==   total heap usage: 87,221 allocs, 51,515 frees, 44,733,752 bytes allocated
==4870== 
==4870== LEAK SUMMARY:
==4870==    definitely lost: 0 bytes in 0 blocks
==4870==    indirectly lost: 0 bytes in 0 blocks
==4870==      possibly lost: 35,173,680 bytes in 34,899 blocks
==4870==    still reachable: 137,069 bytes in 807 blocks
==4870==         suppressed: 0 bytes in 0 blocks
==4870== Rerun with --leak-check=full to see details of leaked memory
==4870== 
==4870== For lists of detected and suppressed errors, rerun with: -s
==4870== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)
Segmentation fault (core dumped)