gdb backtrace of `tcpdump -vvv -i eth0 -w tcpdump-4.7.4-libpcap-1.7.3.pcap'

getservent.gdb.txt (text/plain), 5.81 KB, created by Jeroen Roovers (RETIRED) on 2015-06-23 04:19:34 UTC

# gdb /usr/sbin/tcpdump core
GNU gdb (Gentoo 7.7.1 p1) 7.7.1
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Really redefine built-in command "frame"? (y or n) [answered Y; input not from terminal]
Really redefine built-in command "thread"? (y or n) [answered Y; input not from terminal]
Really redefine built-in command "start"? (y or n) [answered Y; input not from terminal]
Reading symbols from /usr/sbin/tcpdump...Reading symbols from /usr/lib/debug//usr/sbin/tcpdump.debug...done.
done.
BFD: Warning: /root/core is truncated: expected core file size >= 3317760, found: 3194880.
[New LWP 3477]
t a a [Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
bCore was generated by `tcpdump -vvv -i eth0 -w tcpdump-4.7.4-libpcap-1.7.3.pcap'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __GI___rawmemchr (s=s@entry=0x0, c_in=c_in@entry=0x0) at rawmemchr.c:145
145     rawmemchr.c: No such file or directory.
gdb> t a a bt full
  Id   Target Id         Frame
* 1    LWP 3477          __GI___rawmemchr (s=s@entry=0x0, c_in=c_in@entry=0x0) at rawmemchr.c:145
gdb> bt full
#0  __GI___rawmemchr (s=s@entry=0x0, c_in=c_in@entry=0x0) at rawmemchr.c:145
        char_ptr = 0x0
        longword_ptr = 0x4
        longword = <optimized out>
        charmask = 0x0
        c = 0x0
#1  0xf67be740 in _nss_db_getservent_r (result=0xf9170d78 <resbuf.10539>, buffer=0x88cdb0 "\373\255$\f", buflen=0x400, errnop=0xfa6fd4c0) at ./nss_files/../nss_db/db-XXX.c:263
        next = <optimized out>
        len = <optimized out>
        p = <optimized out>
        err = <optimized out>
        end = 0xf73c11b8 <error: Cannot access memory at address 0xf73c11b8>
        status = NSS_STATUS_UNAVAIL
        data = 0x88cdb0
#2  0xf91183e8 in __nss_getent_r (getent_func_name=getent_func_name@entry=0xf914e680 "getservent_r", setent_func_name=setent_func_name@entry=0xf914e668 "setservent", lookup_fct=<optimized out>, nip=nip@entry=0xf9170d9c <nip>, startp=<optimized out>, last_nip=<optimized out>, stayopen_tmp=<optimized out>, res=<optimized out>, resbuf=<optimized out>, buffer=<optimized out>, buflen=<optimized out>, result=<optimized out>, h_errnop=<optimized out>) at getnssent_r.c:163
        is_last_nip = 0x0
        fct = <error reading variable fct (can't compute CFA for this frame)>
        no_more = 0x0
        status = NSS_STATUS_NOTFOUND
#3  0xf9108d78 in __getservent_r (resbuf=0xf9170d78 <resbuf.10539>, buffer=<optimized out>, buflen=0x400, result=0xfac25788) at ../nss/getXXent_r.c:161
        status = <optimized out>
        save = <optimized out>
#4  0xf9117e20 in __nss_getent (func=@0xf916c5d2: 0xf9108ca8 <__getservent_r>, resbuf=resbuf@entry=0xf9170d78 <resbuf.10539>, buffer=buffer@entry=0xf916f3d4 <buffer>, buflen=buflen@entry=0x400, buffer_size=<optimized out>, h_errnop=<optimized out>) at getnssent.c:36
        result = <optimized out>
#5  0xf91088ac in getservent () at ../nss/getXXent.c:83
        buffer_size = 0x400
        resbuf = {
          l = {
            s_name = 0x0,
            s_aliases = 0x0,
            s_port = 0x0,
            s_proto = 0x0
          },
          ptr = 0x0
        }
        result = <optimized out>
        save = <optimized out>
#6  0x00019374 in init_servarray (ndo=0x1b1e7c <Gndo>) at ./addrtoname.c:734
        sv = <optimized out>
        table = <optimized out>
        i = <optimized out>
        buf = <error reading variable buf (can't compute CFA for this frame)>
#7  init_addrtoname (ndo=0x1b1e7c <Gndo>, localnet=<optimized out>, mask=<optimized out>) at ./addrtoname.c:1153
No locals.
#8  0x000160ac in main (argc=<optimized out>, argv=<optimized out>) at ./tcpdump.c:1786
        cnt = 0xffffffff
        op = <optimized out>
        i = <optimized out>
        localnet = <error reading variable localnet (can't compute CFA for this frame)>
        netmask = <error reading variable netmask (can't compute CFA for this frame)>
        cp = <optimized out>
        infile = <error reading variable infile (can't compute CFA for this frame)>
        cmdbuf = 0x0
        device = 0xfac217f8 "eth0"
        RFileName = 0x0
        VFileName = <error reading variable VFileName (can't compute CFA for this frame)>
        WFileName = <error reading variable WFileName (can't compute CFA for this frame)>
        callback = <optimized out>
        type = <optimized out>
        dlt = 0xffffffff
        new_dlt = <optimized out>
        dlt_name = <optimized out>
        fcode = <error reading variable fcode (can't compute CFA for this frame)>
        oldhandler = <optimized out>
        printinfo = <error reading variable printinfo (can't compute CFA for this frame)>
        dumpinfo = <error reading variable dumpinfo (can't compute CFA for this frame)>
        pcap_userdata = <optimized out>
        ebuf = <error reading variable ebuf (can't compute CFA for this frame)>
        VFileLine = <error reading variable VFileLine (can't compute CFA for this frame)>
        username = 0xa4078 "tcpdump"
        ret = 0x0
        end = <error reading variable end (can't compute CFA for this frame)>
        devpointer = <error reading variable devpointer (can't compute CFA for this frame)>
        devnum = <optimized out>
        status = <optimized out>
        VFile = 0x0