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exec() crashes Rust Python when taking large expression as argument #2783
Description
When we set the argument of exec() as a complex expression, Rust Python interpreter crashes Please check the following example. This example triggers segmentation fault on Rust Python 0.1.2 interpreter.
test.py
mylist = []
n = 10000
print(exec("mylist"+"+mylist"*n))
Actual output:
Segmentation fault (core dumped)
System:
Ubuntu 16.04
Rust Python 0.1.2 interpreter
Activity
DimitrisJim commentedon Aug 5, 2021
I'm under the impression that all these issues (#2782, #2781 and #2780) are related. We don't yet detect recursions when they appear in Rust level code (i.e rebinding
__repr__as__str__then__str__callsvm.to_reprand the loop begins). Similar things probably happen forexecand family.For Python code this appears to have been fixed in #1477.
I'll open an umbrella issue to track all these and keep them localized in one overarching issue.
DimitrisJim commentedon Aug 5, 2021
Yup,
exec,evalandcompileall loop onSymbolTableBuilder.scan_expression.DimitrisJim commentedon Aug 5, 2021
Thanks for all these @xiaxinmeng, I'll be closing them in favor of #2796