Date: Wed, 14 Mar 2007 23:03:22 GMT From: Oles Hnatkevych<don_oles@able.com.ua> To: freebsd-gnats-submit@FreeBSD.org Subject: threads/110306: apache 2.0 segmentation violation when calling gethostbyname Message-ID: <200703142303.l2EN3MPP056443@www.freebsd.org> Resent-Message-ID: <200703142310.l2ENA3in026640@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 110306
>Category: threads
>Synopsis: apache 2.0 segmentation violation when calling gethostbyname
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-threads
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Mar 14 23:10:03 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator: Oles Hnatkevych
>Release: 6.2-STABLE
>Organization:
>Environment:
FreeBSD murzik.oles.net 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Thu Dec 28 17:06:26 EET 2006 root@murzik.oles.net:/usr/obj/usr/src/sys/MURZIK i386
>Description:
"apachectl restart" causes apache httpd process to dump core:
Mar 15 00:32:27 murzik kernel: pid 95239 (httpd), uid 0: exited on signal 11 (core dumped)
The problem happens if php module is loaded and ServerName is not defined in httpd.conf.
It's believed that the problem happens on FreeBSD only and the cause of the problem is bug in threading functions, not the apache or php bug.
Apache is 2.0.59, php is 5.1.5 (but seems to be irrelevant)
The backtrace:
(gdb) bt full
#0 0x28d1a034 in ?? ()
No symbol table info available.
#1 0x28427832 in pthread_main_np_int () at /usr/src/lib/libc/gen/_pthread_stubs.c:183
No locals.
#2 0x2840595e in __hostdata_init () at /usr/src/lib/libc/net/gethostnamadr.c:67
he = (struct hostdata *) 0xbfbfebf4
#3 0x28406264 in gethostbyname (name=0xbfbfe5b0 "murzik.oles.net") at /usr/src/lib/libc/net/gethostnamadr.c:363
hd = (struct hostdata *) 0x0
rval = (struct hostent *) 0xa
ret_h_errno = 675506452
#4 0x08070f11 in ap_get_local_host (a=0x80a6018) at util.c:2045
str = "murzik.oles.net\000\000\000\000\000\001\000\000\000\002\000\000\000N\2203(▒忿\n\000\000\002\000\000\000\000\004\000\000\000\001\000\000\000P▒3(H濿\031▒2(y▒\026\b0濿\020\000\000\000\215▒2(y4\vD▒꿿\000▒\026\bn▒2(\204▒\026\b4濿\004\000\000\000X▒2(h\2203(\001\000\000\000\002\000\000\000N\2203(7濿\n\000\000\002\000\000\000\000\004\000\000\000\001\000\000\000P▒3(x濿\021▒2(y▒\026\b\204▒\026\bH翿▒▒2(@=I(▒▒\t\b\002\000\000\000\002\000\000\000\001\000\000\000P▒3("...
server_hostname = 0x0
p = (struct hostent *) 0x816c500
#5 0x0806cdc7 in ap_fini_vhost_config (p=0x80a6018, main_s=0x80a7df8) at vhost.c:535
sar = (server_addr_rec *) 0x0
has_default_vhost_addr = 135445688
s = (server_rec *) 0x80a7df8
i = 134897688
iphash_table_tail = {0x40, 0x80b2968, 0x0, 0x28438480, 0x2844d9e4, 0x82a8140, 0xbfbfe7c8, 0x283c2b29, 0x80a6018, 0x8, 0xbfbfe748, 0x806db14, 0x6c,
0x80b29d0, 0x3, 0x80b29d0, 0x80b2858, 0x80b2000, 0x0, 0x0, 0x755, 0x41ed0008, 0xbfbfe778, 0x2832aec5, 0xbfbfe874, 0x45f849ec, 0x2832ae2c, 0x41ed,
0x2833a150, 0x809817c, 0xbfbfe808, 0x2832b236, 0xbfbfe830, 0xbfbfe7a0, 0x8000, 0x2832b1d0, 0x0, 0x0, 0x0, 0x0, 0x5b, 0x12b197, 0x1d41ed, 0x3ed, 0x50,
0x4ab48d, 0x45f877e2, 0x0, 0x45f849ec, 0x0, 0x45f849ec, 0x0, 0x600, 0x8134c08, 0x4, 0x8134c08, 0x1000, 0x8134000, 0xbfbfe818, 0x284732ae, 0x80a6018, 0x8,
0xbfbfe828, 0x28473259, 0x81349a8, 0x2833a150, 0x8134c09, 0x28474f99, 0x28476470, 0x81347f8, 0xbfbfe858, 0x284733e1, 0x80a6018, 0x81349bc, 0xbfbfe894,
0x284733b9, 0x8134990, 0x80a6018, 0x1e, 0x28327688, 0x1, 0x18, 0xbfbfe868, 0x28474f98, 0x28476470, 0x2833a150, 0xbfbfe898, 0x283283c1, 0x8134c18,
0xbfbfeafc, 0x809817c, 0x2832815d, 0x8134f40, 0x48, 0x8134f3b, 0x10, 0x50415448, 0x4, 0x8134f40, 0x8134d30, 0x2847b178, 0x809817c, 0xbfbfe8c8, 0x2847abef,
0x8134c18, 0x8134f38, 0x8134f40, 0x2847aba0, 0x8134da8, 0x8091f20, 0xbfbfedf8, 0x8134c18, 0x8134c10, 0x81260e4, 0xbfbfe938, 0x8067cc1, 0x80a6018,
0xbfbfe94c, 0x8134f38, 0x2847aa48, 0x2847b020, 0xa, 0xbfbfe908, 0x2847aa09, 0x81260b0, 0x2847ae41, 0x8134580, 0x8134c10, 0x1, 0x809817c, 0xbfbfe928,
0x8067fd4, 0x81341b0, 0x2847b080, 0x8134c10, 0x0, 0x0, 0x0, 0xbfbfe968, 0x806851e, 0x8091f20, 0x1, 0xbfbfe968, 0x8068550, 0x2847b020, 0xbfbfeac0,
0x8134c10, 0x81260e4, 0x80a6018, 0x0, 0x0, 0x8134c10, 0x2847b020, 0x2847b080, 0xbfbfe998, 0x80685e4, 0x81260c0, 0xbfbfeac0, 0x81341b0, 0x8069823,
0x80a6018, 0x80b3ea3, 0x80b3ea8, 0x0, 0x0, 0x80f34d8, 0xbfbfe9d8, 0x807c264, 0x0, 0xbfbfeac0, 0x81341b0, 0xbfbfe9d0, 0x0, 0x8095300, 0x0, 0x0, 0x0,
0x80a6018, 0x8122ed3, 0x0, 0x80b3ea8, 0x80a7df8, 0xbfbfea48, 0x80676a0, 0xbfbfeac0, 0x80f35e8, 0x80b3e98, 0x1, 0x8095330, 0xbfbfeafc, 0xbfbfea18,
0x8067ee2, 0x8122e98, 0x8094196, 0xa, 0x28327436, 0x1, 0x80b4720, 0xbfbfea48, 0x80799c4...}
#6 0x0806c478 in main (argc=1, argv=0xbfbfebec) at main.c:623
c = 0 '\0'
configtestonly = 0
confname = 0x809184c "etc/apache2/httpd.conf"
def_server_root = 0x8091863 "/usr/local"
temp_error_log = 0x0
process = (process_rec *) 0x80a4090
server_conf = (server_rec *) 0x80a7df8
pglobal = (apr_pool_t *) 0x80a4018
pconf = (apr_pool_t *) 0x80a6018
plog = (apr_pool_t *) 0x80d2018
ptemp = (apr_pool_t *) 0x80f1018
pcommands = (apr_pool_t *) 0x80a8018
opt = (apr_getopt_t *) 0x80a80b0
rv = 70014
mod = (module **) 0x809801c
optarg = 0x2809e9a1 "\215e▒[\211▒^_▒▒▒\214▒▒▒▒▒\211▒U\211▒WVS\203▒8▒"
signal_server = (apr_OFN_ap_signal_server_t *) 0
(gdb)
>How-To-Repeat:
Install ports www/apache20 and lang/php5, run apache server, run "apachectl restart"
>Fix:
Only workaround is known: define ServerName in httpd.conf
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200703142303.l2EN3MPP056443>