On Sun, 29 Jun 2008 11:56:49 +0200 Andreas Henriksson <[EMAIL PROTECTED]> wrote:
> Hi Stephen and others interested! > > Could you please have a look at lnstat. We got a bugreport in Debian > about it segfaulting. It happens for me too on my workstation (amd64), > which is also my internet gateway at home, but not on my laptop (i386). > > I can't figure out what's going on. The segfault only happens when > lnstat is compiled with atleast -O1. It seems like the fp->params array > is getting corrupted at 65th element inside build_hdr_string() at the > first for loop where memory is malloced and memset. That seems totally > unrelated to me though, could it be something like use of freed memory? > I have no clue... > > In case you can't reproduce, I've made a tarball of my /proc/net/stat > and attached, which I hope helps. > > PS. any news on the debian front (stuff sent to [EMAIL PROTECTED]) > will be available through http://bugs.debian.org/488430 (and other > problems at http://bugs.debian.org/iproute ). > > > > -------- Forwarded Message -------- > From: Andrew France <[EMAIL PROTECTED]> > Reply-To: Andrew France <[EMAIL PROTECTED]>, [EMAIL PROTECTED] > To: Debian Bug Tracking System <[EMAIL PROTECTED]> > Subject: Bug#488430: iproute: lnstat causes segmentation fault > Date: Sat, 28 Jun 2008 21:30:06 +0100 > > Package: iproute > Version: 20080417-1 > Severity: important > > Hi, > > Running 'lnstat' results in a segmentation fault, although the symlinked > 'rtstat' runs fine. Lnstat strace included below. > > > -- System Information: > Debian Release: lenny/sid > APT prefers testing > APT policy: (500, 'testing') > Architecture: amd64 (x86_64) > > Kernel: Linux 2.6.24-1-amd64 (SMP w/2 CPU cores) > Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) > Shell: /bin/sh linked to /bin/bash > > Versions of packages iproute depends on: > ii libc6 2.7-10 GNU C Library: Shared libraries > ii libdb4.6 4.6.21-8 Berkeley v4.6 Database Libraries > [ > > Versions of packages iproute recommends: > ii libatm1 2.4.1-17.2 shared library for ATM > (Asynchrono > > -- no debconf information > > *** lnstat.strace > execve("/usr/bin/lnstat", ["lnstat"], [/* 22 vars */]) = 0 > brk(0) = 0x604000 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210df000 > access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or > directory) > mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e0000 > access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or > directory) > open("/etc/ld.so.cache", O_RDONLY) = 3 > fstat(3, {st_mode=S_IFREG|0644, st_size=36821, ...}) = 0 > mmap(NULL, 36821, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2b0f210e2000 > close(3) = 0 > access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or > directory) > open("/lib/libresolv.so.2", O_RDONLY) = 3 > read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P3\0\0\0"..., 832) = > 832 > fstat(3, {st_mode=S_IFREG|0644, st_size=72568, ...}) = 0 > mmap(NULL, 2177800, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = > 0x2b0f212e0000 > mprotect(0x2b0f212f0000, 2097152, PROT_NONE) = 0 > mmap(0x2b0f214f0000, 8192, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x10000) = 0x2b0f214f0000 > mmap(0x2b0f214f2000, 6920, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b0f214f2000 > close(3) = 0 > access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or > directory) > open("/lib/libc.so.6", O_RDONLY) = 3 > read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\342"..., 832) = > 832 > fstat(3, {st_mode=S_IFREG|0755, st_size=1330480, ...}) = 0 > mmap(NULL, 3437144, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = > 0x2b0f214f4000 > mprotect(0x2b0f21632000, 2097152, PROT_NONE) = 0 > mmap(0x2b0f21832000, 20480, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x13e000) = 0x2b0f21832000 > mmap(0x2b0f21837000, 16984, PROT_READ|PROT_WRITE, > MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x2b0f21837000 > close(3) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f2183c000 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f2183d000 > arch_prctl(ARCH_SET_FS, 0x2b0f2183caf0) = 0 > mprotect(0x2b0f21832000, 12288, PROT_READ) = 0 > munmap(0x2b0f210e2000, 36821) = 0 > open("/proc/net/stat", O_RDONLY|O_NONBLOCK|O_DIRECTORY|0x80000) = 3 > fstat(3, {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0 > fcntl(3, F_GETFD) = 0x1 (flags FD_CLOEXEC) > brk(0) = 0x604000 > brk(0x625000) = 0x625000 > getdents(3, /* 8 entries */, 1024) = 248 > open("/proc/net/stat/ip_conntrack", O_RDONLY) = 4 > fstat(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e2000 > lseek(4, 0, SEEK_SET) = 0 > read(4, "entries searched found new inva"..., 1024) = 444 > open("/proc/net/stat/nf_conntrack", O_RDONLY) = 5 > fstat(5, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e3000 > lseek(5, 0, SEEK_SET) = 0 > read(5, "entries searched found new inva"..., 1024) = 444 > open("/proc/net/stat/ndisc_cache", O_RDONLY) = 6 > fstat(6, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e4000 > lseek(6, 0, SEEK_SET) = 0 > read(6, "entries allocs destroys hash_gr"..., 1024) = 338 > open("/proc/net/stat/clip_arp_cache", O_RDONLY) = 7 > fstat(7, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e5000 > lseek(7, 0, SEEK_SET) = 0 > read(7, "entries allocs destroys hash_gr"..., 1024) = 338 > open("/proc/net/stat/rt_cache", O_RDONLY) = 8 > fstat(8, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e6000 > lseek(8, 0, SEEK_SET) = 0 > read(8, "entries in_hit in_slow_tot in_s"..., 1024) = 517 > open("/proc/net/stat/arp_cache", O_RDONLY) = 9 > fstat(9, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0 > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f210e7000 > lseek(9, 0, SEEK_SET) = 0 > read(9, "entries allocs destroys hash_gr"..., 1024) = 338 > getdents(3, /* 0 entries */, 1024) = 0 > close(3) = 0 > mmap(NULL, 6356992, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = > 0x2b0f2183e000 > munmap(0x2b0f2183e000, 6356992) = 0 > brk(0xc42000) = 0xc42000 > --- SIGSEGV (Segmentation fault) @ 0 (0) --- > +++ killed by SIGSEGV +++ > Process 19271 detached > > The problem is that MAX_FIELDS is 64, but lnstat is finding 71 fields. This causes a array out of range problem. Just bump MAX_FIELDS to 128 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
