bellard_1776_quickjs.d7ae12a:task_cleanroom contains readable executable

[suche-ux]

Hi, I noticed cheating behavior in this task

seems the task_cleanroom image contains readable executable under tmp dir.

can you take a look?

docker run -it --rm docker.io/programbench/bellard_1776_quickjs.d7ae12a:task_cleanroom
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
root@f0608ae4de15:/workspace# ls /tmp -l
total 4808
-rw-r--r-- 1 1001 1001 4921336 Apr 21 20:32 _inject_exe

[rshin]

Another demonstration:

podman run --user agent --rm -it programbench/bellard_1776_quickjs.d7ae12a:task_cleanroom \
/bin/bash -x -c "ls -l /tmp/_inject_exe; cp /tmp/_inject_exe /tmp/executable; chmod +x /tmp/executable; /tmp/executable -h"

prints

+ ls -l /tmp/_inject_exe
-rw-r--r-- 1 1001 1001 4921336 Apr 21 20:32 /tmp/_inject_exe
+ cp /tmp/_inject_exe /tmp/executable
+ chmod +x /tmp/executable
+ /tmp/executable -h
QuickJS version 2025-09-13
usage: qjs [options] [file [args]]
-h  --help         list options
-e  --eval EXPR    evaluate EXPR
-i  --interactive  go to interactive mode
-m  --module       load as ES6 module (default=autodetect)
    --script       load as ES6 script (default=autodetect)
    --strict       force strict mode
-I  --include file include an additional file
    --std          make 'std' and 'os' available to the loaded script
-T  --trace        trace memory allocation
-d  --dump         dump the memory usage stats
    --memory-limit n  limit the memory usage to 'n' bytes (SI suffixes allowed)
    --stack-size n    limit the stack size to 'n' bytes (SI suffixes allowed)
    --no-unhandled-rejection  ignore unhandled promise rejections
-s                    strip all the debug info
    --strip-source    strip the source code
-q  --quit         just instantiate the interpreter and quit