https://sourceware.org/bugzilla/show_bug.cgi?id=26113
Bug ID: 26113
Summary: gas 2.34 gets stuck in infinite loop after compilation
error
Product: binutils
Version: 2.34
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: me at tbrindus dot ca
Target Milestone: ---
Created attachment 12622
--> https://sourceware.org/bugzilla/attachment.cgi?id=12622&action=edit
Python source code
Hi,
We run a system where students may submit code in several languages and have it
run on our machines -- among others, we support x64 Assembly and Python. One
student mis-selected the language of their source code, and submitted a Python
program as x64 Assembly. This caused gas 2.34 to lock up after emitting the
expected syntax errors; it did not terminate after 8 hours (when we found out
and SIGKILL'd the process).
We are running gas from Debian sid's repos. In particular:
$ x86_64-linux-gnu-as --version
GNU assembler (GNU Binutils for Debian) 2.34
Copyright (C) 2020 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `x86_64-linux-gnu'.
The file submitted is attached. Running gas with no extra arguments exhibits
the issue.
$ x86_64-linux-gnu-as test.py
test.py: Assembler messages:
test.py:1: Error: no such instruction: `def cal():'
test.py:2: Error: junk at end of line, first unrecognized character is `('
test.py:4: Error: invalid character '(' in mnemonic
...snip...
test.py:17: Error: invalid character '(' in mnemonic
test.py: Error: symbol definition loop encountered at `int'
test.py: Error: invalid operands (.text and *ABS* sections) for `%' when
setting `a'
^C
This appears to be a regression since 2.31.1 (Debian buster version of gas),
which exits after emitting the error messages.
I'm happy to provide any other information that may be useful.
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