php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #67245 usage of memcpy() with overlapping src and dst in zend_exceptions.c
Submitted: 2014-05-11 12:27 UTC Modified: 2014-05-11 13:18 UTC
Votes:1
Avg. Score:3.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: gm dot outside+php at gmail dot com Assigned: bwoebi (profile)
Status: Closed Package: *General Issues
PHP Version: 5.5.12 OS: Linux
Private report: No CVE-ID: None
View Developer Edit
Welcome! If you don't have a Git account, you can't do anything here.
If you reported this bug, you can edit this bug over here.
(description)
Block user comment
Status: Assign to:
Package:
Bug Type:
Summary:
From: gm dot outside+php at gmail dot com
New email:
PHP Version: OS:

 

 [2014-05-11 12:27 UTC] gm dot outside+php at gmail dot com 
Description:
------------
According to man page for memcpy(3) the function should not be used with overlapping source and destination arguments.  A recent update to Zend/zend_exceptions.c (commit: http://git.php.net/?p=php-src.git;a=commitdiff;h=afa03a470ef90a53f2b59a8175f77afdb6b5a651) introduced formatting of trace's arguments where it uses memcpy() with overlapping addresses.  This causes issues on at least systems with glibc 2.3.6 and the testsuite on such systems fails.

If one replaces memcpy() with memmove() the testsuite will pass again.

P.S. I believe that there should be a more efficient way to achieve the string formatting since re-allocating string byte by byte should be very inefficient, but this is unrelated to the bug at hand.

Patches

zend_exceptions-memmove (last revision 2014-05-11 12:27 UTC by gm dot outside+php at gmail dot com)

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2014-05-11 12:30 UTC] felipe@php.net
-Status: Open +Status: Assigned -Assigned To: +Assigned To: bwoebi
 [2014-05-11 12:59 UTC] bwoebi@php.net
-Status: Assigned +Status: Closed
 [2014-05-11 12:59 UTC] bwoebi@php.net 
That bug had already been fixed in http://git.php.net/?p=php-src.git;a=commitdiff;h=0e273217cfd1e72b5109a880fb4334edd2f61448 … I had noticed it later...
 [2014-05-11 13:09 UTC] bwoebi@php.net
-Status: Closed +Status: Re-Opened
 [2014-05-11 13:09 UTC] bwoebi@php.net 
Oh, wait, I've merged it into the wrong branch, will fix.
 [2014-05-11 13:18 UTC] bwoebi@php.net
-Status: Re-Opened +Status: Closed
 [2014-05-11 13:18 UTC] bwoebi@php.net 
Cherry-picked fix for 5.4 and 5.5. Now everything should be right.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Fri Oct 31 11:00:01 2025 UTC