[DragonFlyBSD - Submit #2920] _ascii_wcsnrtombs, _ascii_mbsnrtowcs, and _none_wcsnrtombs neglect to set src on EILSEQ error

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #2920 has been updated by yellowrabbit2010.

File eilseq_fix_corrected_2.patch added
Tracker changed from Bug to Submit

corrected patch from  RockinRoel and, while we are here fix possible NULL pointer dereference.

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Submit #2920: _ascii_wcsnrtombs, _ascii_mbsnrtowcs, and _none_wcsnrtombs neglect to set src on EILSEQ error
http://bugs.dragonflybsd.org/issues/2920#change-12921

* Author: RockinRoel
* Status: New
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
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DragonFlyBSD's libc also suffers from this bug in FreeBSD and Mac OS X: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209907

I noticed that when using wcsrtombs, if a character is encountered that can not be converted, it sets errno to EILSEQ and returns (size_t)-1. However *src still points to the original character, even though it should point to the character after the one that conversion stopped at. I've attached a test program that reproduces the issue.

The expected output is:
inptr - in: 7

The actual output is:
inptr - in: 0

I've included the patch that fixes it for the none and ascii locale (it's fine for other locales).

---Files--------------------------------
test_wcsrtombs.c (312 Bytes)
eilseq_fix.patch (1006 Bytes)
eilseq_fix_corrected_2.patch (1.32 KB)


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