ngrep segmentation fault

am 27.10.2004 21:20:36 von drupix

Hello.

About 2 weeks ago i did a mass upgrade with SWARET on my slack10 box.
BAD IDEA. Well, it just rendered samba and ngrep useless. Samba worked
again after rebuilding and reinstalling some libs but ngrep never did.
It gives me this output:

root@ludmila:~/# ngrep
Segmentation fault

When i try to build from source i get this:
----------------
../configure
----------------
[....]
Configuring Network Grep (ngrep) ...

checking for DLT_LINUX_SLL in bpf.h... no
checking for DLT_LOOP in bpf.h... no
checking for DLT_IEEE802_11 in bpf.h... no
checking for DLT_RAW in bpf.h... no
checking for a dumb udphdr declaration... no
checking for a complete set of pcap headers... no
couldn't find a complete set of pcap headers
----------------
and no Makefile is created.

I have tried reinstalling libpcap, installation worked fine but ngrep
gives me the same error regarding pcap headers. Downloading ngrep
binary executable from website returns the same Segmentation fault
error so my binary is not corrupted.
Any help would be appreciated. Thanks.

--Adrian
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ngrep segmentation fault

am 28.10.2004 14:56:59 von drupix

That's my output for strace ngrep. I am afraid i am unable to interpret it.

root@ludmila:~# strace ngrep
execve("/bin/ngrep", ["ngrep"], [/* 30 vars */]) = 0
uname({sys="Linux", node="ludmila", ...}) = 0
fcntl64(0, F_GETFD) = 0
fcntl64(1, F_GETFD) = 0
fcntl64(2, F_GETFD) = 0
geteuid32() = 0
getuid32() = 0
getegid32() = 0
getgid32() = 0
brk(0) = 0x80d9d8c
brk(0x80dad8c) = 0x80dad8c
brk(0x80db000) = 0x80db000
open("/dev/urandom", O_RDONLY) = 3
read(3, "qG\\-\2575[\27\'\267\251\310\23\226!\310\250\361\35jf\327". .., 32) = 32
close(3) = 0
rt_sigaction(SIGINT, {0x8049fd0, [INT], SA_RESTORER|SA_RESTART,
0x8062dd8}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {0x8049fd0, [QUIT], SA_RESTORER|SA_RESTART,
0x8062dd8}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGABRT, {0x8049fd0, [ABRT], SA_RESTORER|SA_RESTART,
0x8062dd8}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGPIPE, {0x8049fd0, [PIPE], SA_RESTORER|SA_RESTART,
0x8062dd8}, {SIG_DFL}, 8) = 0
rt_sigaction(SIGWINCH, {0x8049dd0, [WINCH], SA_RESTORER|SA_RESTART,
0x8062dd8}, {SIG_DFL}, 8) = 0
socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 3
ioctl(3, SIOCGIFCONF, 0xbffff090) = 0
ioctl(3, SIOCGIFCONF, 0xbffff090) = 0
ioctl(3, SIOCGIFFLAGS, 0x80da078) = 0
ioctl(3, SIOCGIFNETMASK, 0x80da078) = 0
ioctl(3, SIOCGIFBRDADDR, 0x80da078) = 0
ioctl(3, SIOCGIFFLAGS, 0x80da098) = 0
ioctl(3, SIOCGIFNETMASK, 0x80da098) = 0
ioctl(3, SIOCGIFBRDADDR, 0x80da098) = 0
ioctl(3, SIOCGIFFLAGS, 0x80da0b8) = 0
ioctl(3, SIOCGIFNETMASK, 0x80da0b8) = 0
ioctl(3, SIOCGIFBRDADDR, 0x80da0b8) = 0
ioctl(3, SIOCGIFFLAGS, 0x80da0d8) = 0
ioctl(3, SIOCGIFNETMASK, 0x80da0d8) = 0
ioctl(3, SIOCGIFBRDADDR, 0x80da0d8) = 0
ioctl(3, SIOCGIFFLAGS, 0x80da0f8) = 0
ioctl(3, SIOCGIFNETMASK, 0x80da0f8) = 0
ioctl(3, SIOCGIFBRDADDR, 0x80da0f8) = 0
close(3) = 0
socket(PF_PACKET, SOCK_RAW, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
ioctl(3, SIOCGIFHWADDR, 0xbfffedf0) = 0
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
bind(3, {sa_family=AF_PACKET, proto=0x03, if1, pkttype=PACKET_HOST,
addr(0)={0, }, 20) = 0
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
setsockopt(3, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
"\1\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
close(3) = 0
socket(PF_PACKET, SOCK_RAW, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
ioctl(3, SIOCGIFHWADDR, 0xbfffedf0) = 0
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
bind(3, {sa_family=AF_PACKET, proto=0x03, if3, pkttype=PACKET_HOST,
addr(0)={0, }, 20) = 0
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
setsockopt(3, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
"\3\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
close(3) = 0
socket(PF_PACKET, SOCK_RAW, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
ioctl(3, SIOCGIFHWADDR, 0xbfffedf0) = 0
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
bind(3, {sa_family=AF_PACKET, proto=0x03, if3, pkttype=PACKET_HOST,
addr(0)={0, }, 20) = 0
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
setsockopt(3, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
"\3\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
close(3) = 0
socket(PF_PACKET, SOCK_RAW, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
ioctl(3, SIOCGIFHWADDR, 0xbfffedf0) = 0
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
bind(3, {sa_family=AF_PACKET, proto=0x03, if3, pkttype=PACKET_HOST,
addr(0)={0, }, 20) = 0
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
setsockopt(3, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
"\3\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
close(3) = 0
socket(PF_PACKET, SOCK_RAW, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
ioctl(3, SIOCGIFHWADDR, 0xbfffedf0) = 0
ioctl(3, SIOCGIFINDEX, 0xbfffedf0) = 0
bind(3, {sa_family=AF_PACKET, proto=0x03, if4, pkttype=PACKET_HOST,
addr(0)={0, }, 20) = 0
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
setsockopt(3, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
"\4\0\0\0\2\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
close(3) = 0
socket(PF_PACKET, SOCK_DGRAM, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffee20) = 0
close(3) = 0
socket(PF_PACKET, SOCK_RAW, 768) = 3
ioctl(3, SIOCGIFINDEX, 0xbfffeed0) = 0
ioctl(3, SIOCGIFHWADDR, 0xbfffeed0) = 0
ioctl(3, SIOCGIFINDEX, 0xbfffeed0) = 0
bind(3, {sa_family=AF_PACKET, proto=0x03, if3, pkttype=PACKET_HOST,
addr(0)={0, }, 20) = 0
getsockopt(3, SOL_SOCKET, SO_ERROR, [0], [4]) = 0
setsockopt(3, SOL_PACKET, PACKET_ADD_MEMBERSHIP,
"\3\0\0\0\1\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
brk(0x80eb000) = 0x80eb000
socket(PF_FILE, SOCK_STREAM, 0) = 4
connect(4, {sa_family=AF_FILE, path="/var/run/.nscd_socket"}, 110) =
-1 ENOENT (No such file or directory)
close(4) = 0
open("/etc/nsswitch.conf", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=1083, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x40000000
read(4, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1083
read(4, "", 4096) = 0
close(4) = 0
munmap(0x40000000, 4096) = 0
open("/etc/ld.so.cache", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=46459, ...}) = 0
mmap2(NULL, 46459, PROT_READ, MAP_PRIVATE, 4, 0) = 0x40000000
close(4) = 0
open("/lib/libnss_compat.so.2", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0P\22\0\000". ..,
1024) = 1024
fstat64(4, {st_mode=S_IFREG|0755, st_size=34422, ...}) = 0
mmap2(NULL, 32012, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x4000c000
mprotect(0x40013000, 3340, PROT_NONE) = 0
mmap2(0x40013000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
4, 0x6) = 0x40013000
close(4) = 0
open("/lib/libnsl.so.1", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0p<\0\000"...,
1024) = 1024
fstat64(4, {st_mode=S_IFREG|0755, st_size=87560, ...}) = 0
brk(0x80ec000) = 0x80ec000
mmap2(NULL, 85088, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x40014000
mprotect(0x40026000, 11360, PROT_NONE) = 0
mmap2(0x40026000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
4, 0x11) = 0x40026000
mmap2(0x40027000, 7264, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40027000
close(4) = 0
open("/lib/libc.so.6", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\320U\1"...,
1024) = 1024
fstat64(4, {st_mode=S_IFREG|0755, st_size=1330257, ...}) = 0
mmap2(NULL, 1138532, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x40029000
mprotect(0x40135000, 40804, PROT_NONE) = 0
mmap2(0x40135000, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
4, 0x10c) = 0x40135000
mmap2(0x4013d000, 8036, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x4013d000
close(4) = 0
open("/lib/ld-linux.so.2", O_RDONLY) = 4
read(4, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0@\t\0\000".. .,
1024) = 1024
fstat64(4, {st_mode=S_IFREG|0755, st_size=96817, ...}) = 0
mmap2(NULL, 84060, PROT_READ|PROT_EXEC, MAP_PRIVATE, 4, 0) = 0x4013f000
mprotect(0x40153000, 2140, PROT_NONE) = 0
mmap2(0x40153000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
4, 0x14) = 0x40153000
close(4) = 0
munmap(0x40000000, 46459) = 0
brk(0) = 0x80ec000
brk(0x810d000) = 0x810d000
open("/etc/nsswitch.conf", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0644, st_size=1083, ...}) = 0
old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS,
-1, 0) = 0x40000000
read(4, "#\n# /etc/nsswitch.conf\n#\n# An ex"..., 4096) = 1083
read(4, "", 4096) = 0
close(4) = 0
munmap(0x40000000, 4096) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

On Thu, 28 Oct 2004 13:50:58 +0530, Rajsekar
wrote:
> You could try
>
> $ strace ngrep
>
> It might give you more info (example the library that is causing the
> problem).
>
> --
> Rajsekar
>
>
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