On 28/10/16 15:55, Denys Vlasenko wrote:
This will probably be mangled by gmail, but here is the proposed fix:
This looks about the right approach, but it causes problems in
subshells, a double free:
$ ./busybox ash -c 'readonly x; echo $(command eval x=2)'
ash: eval: line 1: x: is read only
*** Error in `./busybox': free(): invalid pointer: 0x000055a784c1c300 ***
[...]
That's with busybox checked out from git (commit
9db74e49e5b462089c6eec0182d819c0d4708e57), where your patch is applied,
completely unpatched and completely default config.
I omitted the backtrace output, but it's popfile() getting called, after
popallfiles() has already been called.
Cheers,
Harald van Dijk
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