ID: 19386
Updated by: [EMAIL PROTECTED]
Reported By: [EMAIL PROTECTED]
-Status: Open
+Status: Bogus
Bug Type: PCRE related
Operating System: *
PHP Version: 4.2.3, 4.3.0-dev
New Comment:
ulimit -S -s 1024 (1MB stack)
Crashes on a length of 1800.
ulimit -S -s 10240 (10MB stack)
Crashes on 18200.
ulimit -S -s 10240 (100MB stack)
Crashes on 182000. (takes a very long time to get there)
This feels pretty bogus to me, since that pattern is
looking for a match on all characters or all CRLF on or more times; it
seems like an expensive way of setting
$y = 1 :-)
This is really a bug in pcrelib and not in PHP, so I'm
marking this as bogus.
A workaround if you insist on using this particular
pattern is to increase your stack size. A better solution
for the code sample you provided probably looks like this:
if (strlen($x))
$y = 1;
Previous Comments:
------------------------------------------------------------------------
[2002-09-26 12:51:04] [EMAIL PROTECTED]
I know this might sound dumb, but do you have any stack size limits in
place?
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[2002-09-26 11:28:56] [EMAIL PROTECTED]
I'm not gonna put the whole backtrace here..it's quite long.. :) But
here's the start of it.
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 1024 (runnable)]
0x818d0d1 in match (eptr=0x853feb2 "", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0, eptrb=0xbfe0225c,
flags=2) at /usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3438
3438 }
(gdb) bt
#0 0x818d0d1 in match (eptr=0x853feb2 "", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0, eptrb=0xbfe0225c,
flags=2) at /usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3438
#1 0x818ddd1 in match (eptr=0x853feb1 "*", ecode=0x854397c "\0178",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0225c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#2 0x818d207 in match (eptr=0x853feb1 "*", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0, eptrb=0xbfe0225c,
flags=2) at /usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#3 0x818ddd1 in match (eptr=0x853feb0 "**", ecode=0x854397c "\0178",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0249c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#4 0x818d207 in match (eptr=0x853feb0 "**", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0249c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#5 0x818ddd1 in match (eptr=0x853feaf "***", ecode=0x854397c "\0178",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe026dc, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#6 0x818d207 in match (eptr=0x853feaf "***", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe026dc, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#7 0x818ddd1 in match (eptr=0x853feae "****", ecode=0x854397c "\0178",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0291c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#8 0x818d207 in match (eptr=0x853feae "****", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0291c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#9 0x818ddd1 in match (eptr=0x853fead "*****", ecode=0x854397c
"\0178", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe02b5c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#10 0x818d207 in match (eptr=0x853fead "*****", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe02b5c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#11 0x818ddd1 in match (eptr=0x853feac "******", ecode=0x854397c
"\0178", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe02d9c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#12 0x818d207 in match (eptr=0x853feac "******", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe02d9c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#13 0x818ddd1 in match (eptr=0x853feab "*******", ecode=0x854397c
"\0178", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe02fdc, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#14 0x818d207 in match (eptr=0x853feab "*******", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe02fdc, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#15 0x818ddd1 in match (eptr=0x853feaa "********", ecode=0x854397c
"\0178", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0321c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#16 0x818d207 in match (eptr=0x853feaa "********", ecode=0x8543979 "H",
offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0321c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#17 0x818ddd1 in match (eptr=0x853fea9 "*********", ecode=0x854397c
"\0178", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0345c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#18 0x818d207 in match (eptr=0x853fea9 "*********", ecode=0x8543979
"H", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0345c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#19 0x818ddd1 in match (eptr=0x853fea8 "**********", ecode=0x854397c
"\0178", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0369c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#20 0x818d207 in match (eptr=0x853fea8 "**********", ecode=0x8543979
"H", offset_top=4, md=0xbfffd348, ims=0,
eptrb=0xbfe0369c, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3538
#21 0x818ddd1 in match (eptr=0x853fea7 '*' <repeats 11 times>,
ecode=0x854397c "\0178", offset_top=4, md=0xbfffd348,
ims=0, eptrb=0xbfe038dc, flags=2) at
/usr/src/web/php/php4/ext/pcre/pcrelib/pcre.c:3931
#22 0x818d207 in match (eptr=0x853fea7 '*' <repeats 11 times>,
ecode=0x8543979 "H", offset_top=4, md=0xbfffd348,
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[2002-09-26 11:21:58] [EMAIL PROTECTED]
How about a backtrace? (Jani?)
Is it PHP or PCRE that's causing this problem?
------------------------------------------------------------------------
[2002-09-20 07:21:16] [EMAIL PROTECTED]
I still can reproduce it with latest CVS HEAD and RH 6.2/x86
------------------------------------------------------------------------
[2002-09-20 04:45:55] [EMAIL PROTECTED]
I cannot reproduce this bug using the latest cvs on redhat 7.3. The
script just keeps going. I cut it off after 20000 chars.
I also do not experience this problem with the latest cvs release on
FreeBSD 4.6-STABLE.
Devon
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