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Large compound commands resulting in a segfault

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  Large compound commands resulting in a segfault "" <kfm@plushkava.net> - 2019-06-21 20:22 +0100

#15064 — Large compound commands resulting in a segfault

Hi, 

The following script generates a compound command consisting of many instances of the : command. I have found that it reproducibly induces a segfault in all versions of bash from 2 onwards. I tested various other shells - several more than are implied here - all of which could handle the generated code without issue.

#!/bin/bash
shells=('busybox sh' dash posh ksh mksh bash)
code=$(printf '{ '; printf '%.s:; ' {1..50000}; printf '}')
for shell in "${shells[@]}"; do
    type "${shell%% *}" &>/dev/null || continue
    echo "testing: $shell"
    echo "$code" | $shell || echo "$shell failed"
done

-- 
Kerin Millar <kfm@plushkava.net>

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