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Re: SIGABRT in text_buffer_iconv on malformed input file


From: Nathaniel Beaver
Subject: Re: SIGABRT in text_buffer_iconv on malformed input file
Date: Mon, 25 May 2020 16:27:17 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0

Certainly, see attached.

On 5/25/20 3:37 PM, Gavin Smith wrote:
On Mon, May 25, 2020 at 01:42:10PM -0400, Nathaniel Beaver wrote:
Steps to reproduce:

$ info -f ./bug_sigabrt.info
gconv.c:73: __gconv: Assertion `outbuf != NULL && *outbuf != NULL' failed.
Aborted (core dumped)

Expected behavior:

info shows an error and exits cleanly.

Actual behavior:

info exits with SIGABRT

Discussion:

This file was generated by afl-fuzz and then hand-edited. I do not claim to
understand how it triggers the bug in texinfo.

Thanks for testing this.

I'll take a look at it some time as well as your other report, but I
wonder if it is possible for you to compile with -O0 to avoid the
backtrace having many values which are "optimized out."

Attachment: gdb.txt
Description: Text document


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