I'm not sure who owns libnss_wins, exactly, so if you guys aren't the owners, please point me in the right direction. I've also almost certainly guessed wrong at the Component field, sorry.

Firefox 3.0.3 is highly unstable for me after upgrading to Ubuntu Intrepid, which provides samba 3.2.3. It will now frequently crash with SIGABRT while loading complex pages. I don't have a reliable repro case, although I have difficulty keeping the browser running for more than 10-15 mins without this occurring.

Here is a stacktrace from a typical crash. As you can see, libnss_wins is servicing a getaddrinfo() call. The Firefox team is of the opinion that this is a bug in libnss_wins.

I would like to help get this fixed. I realize the backtrace doesn't have libnss symbols. If you could let me know how to collect additional information I could provide I would be happy to do so.

See also these Ubuntu bugs:

https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/282287
https://bugs.launchpad.net/ubuntu/+source/firefox-3.0/+bug/294344

See also this Firefox bug:

https://bugzilla.mozilla.org/show_bug.cgi?id=463101

Stacktrace from SIGABRT crash:

Program received signal SIGABRT, Aborted.
[Switching to Thread 0xa6ffcb90 (LWP 3755)]
0xb800e430 in __kernel_vsyscall ()
(gdb) bt full
#0  0xb800e430 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7d6b880 in raise () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0xb7d6d248 in abort () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#3  0xb3a935dd in talloc_free () from /usr/lib/libtalloc.so.1
No symbol table info available.
#4  0xb0b05289 in ?? () from /lib/libnss_wins.so.2
No symbol table info available.
#5  0xb3a93621 in talloc_free () from /usr/lib/libtalloc.so.1
No symbol table info available.
#6  0xb0b30758 in alloc_sub_basic () from /lib/libnss_wins.so.2
No symbol table info available.
#7  0xb0b30d3f in talloc_sub_basic () from /lib/libnss_wins.so.2
No symbol table info available.
#8  0xb0a70281 in ?? () from /lib/libnss_wins.so.2
No symbol table info available.
#9  0xb0a713f2 in lp_lockdir () from /lib/libnss_wins.so.2
No symbol table info available.
#10 0xb0b2aa75 in lock_path () from /lib/libnss_wins.so.2
No symbol table info available.
#11 0xb0ac9767 in receive_unexpected () from /lib/libnss_wins.so.2
No symbol table info available.
#12 0xb0acc375 in receive_nmb_packet () from /lib/libnss_wins.so.2
No symbol table info available.
#13 0xb0acee4d in name_query () from /lib/libnss_wins.so.2
No symbol table info available.
#14 0xb0a6c555 in _nss_wins_gethostbyname_r () from /lib/libnss_wins.so.2
No symbol table info available.
#15 0xb0a6c853 in _nss_wins_gethostbyname2_r () from /lib/libnss_wins.so.2
No symbol table info available.
#16 0xb7e05666 in gaih_inet () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#17 0xb7e07039 in getaddrinfo () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#18 0xb7c7d6b9 in PR_GetAddrInfoByName (
    hostname=0x86b3664 "stats.wordpress.com", af=0, flags=32800)
    at prnetdb.c:2042
    res = <value optimized out>
    hints = {ai_flags = 0, ai_family = 0, ai_socktype = 1, 
  ai_protocol = 0, ai_addrlen = 0, ai_addr = 0x0, ai_canonname = 0x0, 
  ai_next = 0x0}
    rv = <value optimized out>
#19 0xb725f454 in nsHostResolver::ThreadFunc (arg=0x836a600)
    at nsHostResolver.cpp:697
    flags = 32800
    status = <value optimized out>
    rec = (nsHostRecord *) 0x86b3630
    ai = (PRAddrInfo *) 0x1