New submission from Xinmeng Xia <[email protected]>:
Calling function exec() with large size can cause a segmentation fault in
Python 3.7 -3.10. Please check the following two examples. The example 1 works
as expected, while the second one triggers segmentation fault on Python
3.7,3.8,3.9,3.10. The primary difference between these two examples lay on the
value of "n".
Example 1:
=========================================
mylist = []
n = 100000
print(exec("mylist"+"+mylist"*n))
==========================================
The actual output: Recursion Error on Python 3.5-3.10 (as expected)
Example 2:
===================================
mylist = []
n = 1000000
print(exec("mylist"+"+mylist"*n))
===================================
The actual output: Recursive Error on Python 3.5, 3.6 (as expected),
segmentation fault on Python 3.7, 3.8, 3.9, 3.10 (not as expected)
My system information:
>> python3.10 -V
Python 3.10.0a2
>> python3.9 -V
Python 3.9.0rc1
>> python3.8 -V
Python 3.8.0
>> python3.7 -V
Python 3.7.3
>> python3.6 -V
Python 3.6.12
>> uname -v
#73~16.04.1-Ubuntu
----------
components: Interpreter Core
messages: 383580
nosy: xxm
priority: normal
severity: normal
status: open
title: Segmentation fault in running exec() with large expression size.
type: crash
versions: Python 3.10, Python 3.7, Python 3.8, Python 3.9
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Python tracker <[email protected]>
<https://bugs.python.org/issue42715>
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