Bugs item #1431750, was opened at 2006-02-14 20:59
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Category: libcurl
Group: crash
Status: Open
Resolution: None
Priority: 5
Submitted By: xbx (xbx___)
Assigned to: Daniel Stenberg (bagder)
Summary: crash when dns slow

Initial Comment:
I have a strange setup with the dns taking a long time
to answer.
I run my app that make periodic http(s) requests.
Everything goes fine, but after a while (that is, after
maybe 10 successfull requests to the same host) I have
this crash:

#0 0xb7fade01 in Curl_connecthost (conn=0x8a73094,
remotehost=0x0,
    sockconn=0x8a7312c, addr=0xbfaefdc4,
connected=0xbfaefe07 "")
    at connect.c:789
#1 0xb7f9ed04 in ConnectPlease (conn=0x8a73094,
hostaddr=0x0,
    connected=0xbfaefe07 "") at url.c:2017
#2 0xb7fa19f3 in SetupConnection (conn=0x8a73094,
hostaddr=0x0,
    protocol_done=0xbfaefe88 "") at url.c:3670
#3 0xb7fa1b08 in Curl_connect (data=0x8ab48bc,
in_connect=0x8b02798,
    asyncp=0xbfaefe89 "", protocol_done=0xbfaefe88 "")
at url.c:3729
#4 0xb7faf002 in curl_multi_perform
(multi_handle=0x8aeac1c,
    running_handles=0xbfaeff34) at multi.c:422
[....]

(notice the hostaddr=0x0 part)

I'm using libcurl 7.15.1, with this configure options:
./configure --prefix=/usr/ --disable-gopher
--disable-ldap --disable-dict --disable-telnet
--enable-nonblocking --enable-debug
--disable-crypto-auth --enable-ares --disable-ipv6

I could further investigate, but I'd have to know which
way to look..
More precisely,
  code = CreateConnection(data, in_connect, &dns, asyncp);
returns:
    code == OK
    dns == null
    asyncp == false
Is the problem that 'code' shouldn't be 'ok', or that
the program shouldn't crash when dns == Null?

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Received on 2006-02-14