lnstat: core dump

[Peter Teoh]

Upon typing lnstat I got coredumped.   Mine is FC6, and kernel is
2.6.28 from linus tree.

strace lnstat
execve("/usr/sbin/lnstat", ["lnstat"], [/* 44 vars */]) = 0
brk(0)                                  = 0x804c000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=86741, ...}) = 0
mmap2(NULL, 86741, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7f5d000
close(3)                                = 0
open("/lib/libresolv.so.2", O_RDONLY)   = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\300@\333\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=76400, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f5c000
mmap2(0xdb2000, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE,
3, 0) = 0xdb2000
mmap2(0xdc1000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xe) = 0xdc1000
mmap2(0xdc3000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xdc3000
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000?W\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1589908, ...}) = 0
mmap2(0x55e000, 1308068, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x55e000
mmap2(0x698000, 12288, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13a) = 0x698000
mmap2(0x69b000, 9636, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x69b000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f5b000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb7f5b6c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0xdc1000, 4096, PROT_READ)     = 0
mprotect(0x698000, 8192, PROT_READ)     = 0
mprotect(0x55a000, 4096, PROT_READ)     = 0
munmap(0xb7f5d000, 86741)               = 0
open("/proc/net/stat", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY) = 3
fstat64(3, {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
fcntl64(3, F_SETFD, FD_CLOEXEC)         = 0
brk(0)                                  = 0x804c000
brk(0x806d000)                          = 0x806d000
getdents(3, /* 7 entries */, 1024)      = 148
open("/proc/net/stat/ip_conntrack", O_RDONLY) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f72000
_llseek(4, 0, [0], SEEK_SET)            = 0
read(4, "entries  searched found new inva"..., 1024) = 738
open("/proc/net/stat/nf_conntrack", O_RDONLY) = 5
fstat64(5, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f71000
_llseek(5, 0, [0], SEEK_SET)            = 0
read(5, "entries  searched found new inva"..., 1024) = 738
open("/proc/net/stat/ndisc_cache", O_RDONLY) = 6
fstat64(6, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f70000
_llseek(6, 0, [0], SEEK_SET)            = 0
read(6, "entries  allocs destroys hash_gr"..., 1024) = 602
open("/proc/net/stat/rt_cache", O_RDONLY) = 7
fstat64(7, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f6f000
_llseek(7, 0, [0], SEEK_SET)            = 0
read(7, "entries  in_hit in_slow_tot in_s"..., 1024) = 829
open("/proc/net/stat/arp_cache", O_RDONLY) = 8
fstat64(8, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0xb7f6e000
_llseek(8, 0, [0], SEEK_SET)            = 0
read(8, "entries  allocs destroys hash_gr"..., 1024) = 602
getdents(3, /* 0 entries */, 1024)      = 0
close(3)                                = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV (core dumped) +++
/mnt/hd2/download/mingo_tip>

[Michael Schwendt]

On Fri, 2 Jan 2009 23:42:44 +0800, Peter wrote:

>  Upon typing lnstat I got coredumped.   Mine is FC6, and kernel is
>  2.6.28 from linus tree.
>  
>  strace lnstat 
Get a full backtrace instead 

  http://fedoraproject.org/wiki/StackTraces

and reproduce it on stock FC6 with the last official updates or -- even
better -- on Fedora 9, 10, or Fedora Development. A program that
reads the /proc fs may need updates for new kernel releases.

Further, if you can reproduce it on a supported release of Fedora:
http://bugz.fedoraproject.org/iproute