Re: Bug #1251 Updated: snmpwalk function causes segfault

> ID: 1251 > Updated by: sas > Reported By: lemming@k332.feld.cvut.cz > Status: Open > Bug Type: Reproduceable crash > Assigned To: > Comments: > > I cannot reproduce that effect here. Could you provide a backtrace? > Make sure to use ucd-snmp-3.6.1 . Maybe they changed function? As I wrote, the problem is that snmp_free frees community string you used, but php passes pointer to its variable structure. --- Backtrace: Starting program: /usr/local/bin/php snmp.php Content-type: text/html Hello world! Program received signal SIGSEGV, Segmentation fault. 0x400c3373 in chunk_free (ar_ptr=0x4011d1a0, p=0x80f3840) at malloc.c:2945 malloc.c:2945: No such file or directory. (gdb) bt #0 0x400c3373 in chunk_free (ar_ptr=0x4011d1a0, p=0x80f3840) at malloc.c:2945 #1 0x400c3241 in __libc_free (mem=0x80f3848) at malloc.c:2872 #2 0x8092300 in snmp_free (cp=0x80f3848) at snmp_api.c:650 #3 0x80923bf in snmp_sess_close (sessp=0x80f47d0) at snmp_api.c:700 #4 0x8092432 in snmp_close (session=0x80f4800) at snmp_api.c:734 #5 0x80821ec in _php3_snmp (ht=0x80f3720, return_value=0x80b5478, list=0x80c70e8, plist=0x80c70bc, st=2) at functions/snmp.c:257 #6 0x808224b in php3_snmpwalk (ht=0x80f3720, return_value=0x80b5478, list=0x80c70e8, plist=0x80c70bc) at functions/snmp.c:270 #7 0x8053b9c in phpparse () at control_structures_inline.h:930 #8 0x805ad57 in php3_parse (yyin=0x80ed6c8) at main.c:1534 #9 0x805b5b9 in main (argc=2, argv=0xbffff8a4) at main.c:1842 --------------- The program that caused segfault: - Hello world! <? $a = snmpwalk("localhost","public","system"); while(list($k,$v) = each($a)) echo "'$k' = '$v'<BR>\n"; ?> - I hope this will help. Michal Kara alias lemming -- PHP Development Mailing List http://www.php.net/ To unsubscribe send an empty message to php-dev-unsubscribe@lists.php.net For help: php-dev-help@lists.php.net