From: Florian Weimer <fweimer@redhat.com>
To: Siddhesh Poyarekar via Libc-alpha <libc-alpha@sourceware.org>
Cc: Siddhesh Poyarekar <siddhesh@sourceware.org>, schwab@linux-m68k.org
Subject: Re: [PATCH] iconvconfig: Fix multiple issues
Date: Fri, 25 Jun 2021 09:26:46 +0200 [thread overview]
Message-ID: <87lf6yievd.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <20210625060913.300418-1-siddhesh@sourceware.org> (Siddhesh Poyarekar via Libc-alpha's message of "Fri, 25 Jun 2021 11:39:13 +0530")
* Siddhesh Poyarekar via Libc-alpha:
> It was noticed on big-endian systems that msgfmt would fail with the
> following error:
>
> msgfmt: gconv_builtin.c:70: __gconv_get_builtin_trans: Assertion `cnt < sizeof (map) / sizeof (map[0])' failed.
> Aborted (core dumped)
>
> This is only seen on installed systems because it was due to a
> corrupted gconv-modules.cache. iconvconfig had the following issues
> (it was specifically freeing fulldir that caused this issue, but other
> cleanups are also needed) that this patch fixes.
>
> - Add prefix only if dir starts with '/'
> - Use stpcpy instead of mempcpy so that the directory string is NULL
> terminated
>
> - Do not free fulldir because it is used later while writing out the
> gconv-modules.cache file.
I suggest to use asprintf. This code is hardly performance critical,
and asprintf avoids such bugs.
I expect that static analysis tools can detect the missing free calls,
so I think we should still free those allocations.
Thanks,
Florian
prev parent reply other threads:[~2021-06-25 7:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-25 6:09 Siddhesh Poyarekar
2021-06-25 7:26 ` Florian Weimer [this message]
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