[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
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On 2009-04-02T10:41:39+00:00 Mihail wrote:
when i type
[root@myserver ~]# ss
State Recv-Q Send-Q Local Address:Port Peer Address:Port
ESTAB 0 0 10.1.0.12:ssh x.x.x.x:4172
ESTAB 0 0 10.1.0.12:mysql 10.1.0.11:34003
Segmentation fault
[root@myserver ~]#
When ipv6 is off
close(4) = 0
open("/proc/net/tcp6", O_RDONLY) = -1 ENOENT (No such file or directory)
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
I try this on i386 and x86_64 and is the same error
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https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/5
On 2009-04-02T10:47:42+00:00 Mihail wrote:
http://bugs.centos.org/view.php?id=3475
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/6
On 2009-04-07T09:27:26+00:00 Marcela wrote:
*** Bug 493622 has been marked as a duplicate of this bug. ***
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/7
On 2009-04-07T14:09:46+00:00 Marcela wrote:
You can use for the meantime: "ss -f inet"
After fixing previous problem "not showing all socket states" #446198 with
upstream commit ab01dbbb94b8620c2bc85e30e107c3a9f0870a73 show up different
bugs. On RHEL-5 machine could be seen this one, which could be fixed by
upstream commit:
69cae645b28edbba53c8601ddeba01430e5e9da0
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/8
On 2009-04-07T14:11:31+00:00 Marcela wrote:
Created attachment 338509
Upstream commit git 69cae645b28edbba53c8601ddeba01430e5e9da0
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/9
On 2009-06-08T22:14:23+00:00 Roberto wrote:
In the function:
static FILE *generic_proc_open(const char *env, const char *name)
{
char store[128];
const char *p = getenv(env);
FILE *fp;
if (!p) {
p = getenv("PROC_ROOT") ? : "/proc";
snprintf(store, sizeof(store)-1, "%s/%s", p, name);
p = store;
}
return fopen(p, "r");
}
PROC_ROOT can be something longer than 128 and cause other segfault.
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/10
On 2009-06-09T06:20:26+00:00 Marcela wrote:
(In reply to comment #7)
> In the function:
>
> static FILE *generic_proc_open(const char *env, const char *name)
> {
> char store[128];
> const char *p = getenv(env);
> FILE *fp;
> if (!p) {
> p = getenv("PROC_ROOT") ? : "/proc";
> snprintf(store, sizeof(store)-1, "%s/%s", p, name);
> p = store;
> }
>
> return fopen(p, "r");
> }
>
> PROC_ROOT can be something longer than 128 and cause other segfault.
If you have a reproducer for this problem, then please open a new bug.
This is different problem.
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/11
On 2009-06-09T07:55:40+00:00 Roberto wrote:
(In reply to comment #8)
> (In reply to comment #7)
> > In the function:
> >
> > static FILE *generic_proc_open(const char *env, const char *name)
> > {
> > char store[128];
> > const char *p = getenv(env);
> > FILE *fp;
> > if (!p) {
> > p = getenv("PROC_ROOT") ? : "/proc";
> > snprintf(store, sizeof(store)-1, "%s/%s", p, name);
> > p = store;
> > }
> >
> > return fopen(p, "r");
> > }
> >
> > PROC_ROOT can be something longer than 128 and cause other segfault.
>
> If you have a reproducer for this problem, then please open a new bug. This is
> different problem.
I didn't see (i'm blind..) the snprintf out of bound comprobation and
the segfault was produced because the content of PROC_ROOT was an
invalid path (you fixed it in the last attachment).
Sorry.
Reply at:
https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/comments/12
On 2009-10-21T11:04:45+00:00 errata-xmlrpc wrote:
An advisory has been issued which should help the problem
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
Fixed in Ubuntu 12.04 ** Changed in: iproute (Ubuntu) Status: New = Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/225573 Title: iproute: ss -u segfaults if ipv6 module is not loaded To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/225573/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
** Tags added: ipv6 -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
** Changed in: iproute (CentOS) Status: Unknown = Fix Released -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
I just found the same bug was tracked in Red Hat Enterprise Bugzilla. It was fixed one month ago with this errata: http://rhn.redhat.com/errata/RHBA-2009-1520.html ** Bug watch added: Red Hat Bugzilla #493578 https://bugzilla.redhat.com/show_bug.cgi?id=493578 ** Also affects: iproute (CentOS) via https://bugzilla.redhat.com/show_bug.cgi?id=493578 Importance: Unknown Status: Unknown -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
The RH errata refers to the same upstream commit that I earlier wrote about That commit was part of the iproute version shipped with Intrepid (and later). -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
Running PROC_NET_UDP6=/foobar/non-exist ss -un works just fine. The problem is not about a missing proc file. Jukka: Could you please get a gdb backtrace? strace is mostly useless for hunting down segmentation faults. To get a useful backtrace you most likely need to rebuild with debugging symbols. Try this: apt-get install build-essential cd /tmp apt-get source iproute cd iproute-* apt-get build-dep iproute make gdb ./misc/ss set args -un run bt -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
Here it is (I modified CCOPTS in the Makefile to replace -O2 by -g to get line
numbers):
#0 0xb7f8eb45 in fgets () from /lib/tls/i686/cmov/libc.so.6
#1 0x0804c6ff in generic_record_read (fp=0x0,
worker=0x804dc35 dgram_show_line, f=0x805af50, fam=10) at ss.c:1233
#2 0x0804e216 in udp_show (f=0x805af50) at ss.c:1786
#3 0x08050d59 in main (argc=0, argv=0xbf9ccecc) at ss.c:2774
I think the problem is in the pointer comparison at ss.c:1785:
if ((f-families(1AF_INET6))
(fp = net_udp6_open()) = 0) {
I changed this to
if ((f-families(1AF_INET6))
(fp = net_udp6_open()) != NULL) {
and the problem went away. There is similar bug in ss.c:1777, too:
if (f-families(1AF_INET)) {
if ((fp = net_udp_open()) 0)
Indeed trying PROC_NET_UDP=/foo/bar ./misc/ss -un segfaulted. Changing above to:
if (f-families(1AF_INET)) {
if ((fp = net_udp_open()) == NULL)
fixed also that problem.
--
iproute: ss -u segfaults if ipv6 module is not loaded
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[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
Thanks Jukka! I'm on a newer version of iproute and those exact changes seems to have already been made there, that's why I couldn't reproduce. Upstream commit: http://git.kernel.org/?p=linux/kernel/git/shemminger/iproute2.git;a=commitdiff;h=69cae645 In other words, this is already fixed in newer iproute releases. -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 225573] Re: iproute: ss -u segfaults if ipv6 module is not loaded
** Attachment added: strace listing for a failing command http://launchpadlibrarian.net/14082530/strace.txt -- iproute: ss -u segfaults if ipv6 module is not loaded https://bugs.launchpad.net/bugs/225573 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
