Edit report at http://bugs.php.net/bug.php?id=51761&edit=1
ID: 51761
User updated by: russell dot tempero at rightnow dot com
Reported by: russell dot tempero at rightnow dot com
Summary: Memory Error: IPR in language scanner
Status: Open
Type: Bug
Package: Scripting Engine problem
Operating System: Linux
PHP Version: 5.3.2
New Comment:
Here is some useful debug information if you wish to trace exactly where
the IPRs are happening:
.
.
.
state: 476 char: ? addr: 0xf1c7885e
state: 140 char: ? addr: 0xf1c7885e
state: 121 char: ? addr: 0xf1c7885e
state: -1 char: ? addr: 0xffce705b
state: 166 char: ? addr: 0xf1c7885e
state: 201 char: > addr: 0xf1c7885f
state: 203 char:
addr: 0xf1c78860
RUSSELL: YYCURSOR: 0xf1c78860 YYLIMIT: 0xf1c78861
state: 202 char:
state: 0 char:
state: 4 char:
state: 3 char:
RUSSELL: returning 0 in yy3
Previous Comments:
------------------------------------------------------------------------
[2010-05-07 00:13:10] russell dot tempero at rightnow dot com
Description:
------------
When running PHP through Purify, I am seeing Invalid Pointer Read (IPR)
errors such as the following:
IPR: Invalid pointer read:
* This is occurring while in thread 8075:
lex_scan [zend_language_scanner.c:3174]
zendlex [zend_compile.c:4950]
zendparse [zend_language_parser.c:3280]
compile_file [zend_language_scanner.l:343]
rnt_compile_file [rnt_opcode_cache.c:1008]
compile_filename [zend_language_scanner.l:386]
* Reading 1 byte from 0xf735f332 between the heap and the stack.
It appears that script files are memory mapped and then a cursor pointer
is used to iterate over the mapped memory. The problem is that the
cursor pointer is not properly checked when reaching the end of the file
and memory values are read that are not part of the mapped memory. I
manually fixed one case of this (see attached diff). However, there are
others.
It looks like this file is generated (using flex?) so this is probably
not actually a PHP issue. However, I thought I would start here. Let me
know if this needs to be submitted to somebody else.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=51761&edit=1
