Re: Null pointer dereference during iSCSI login
Mike Christie wrote: > Ulrich Windl wrote: >> Hello, >> >> with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem >> during >> login using "iscsiadm -m node -L automatic". After a few logins, login >> suddenly >> fails: > > I think you will have to make a suse bugzilla or try to recreate with > the current open-iscsi code. open-iscsi-2.0.707 is a little old and I > have no idea what suse adds to it. > > I think suse might actually have this one fixed though. You can contact > Hannes Reinecke . I think he gets the suse bugzilla for > iscsi too, so either way you will reach him. > Oh yeah, hannes, does the iscsi code in that kernel use sock_no_sendpage or kernel_sendmsg? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/open-iscsi -~--~~~~--~~--~--~---
Re: Null pointer dereference during iSCSI login
Ulrich Windl wrote: > Hello, > > with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem > during > login using "iscsiadm -m node -L automatic". After a few logins, login > suddenly > fails: I think you will have to make a suse bugzilla or try to recreate with the current open-iscsi code. open-iscsi-2.0.707 is a little old and I have no idea what suse adds to it. I think suse might actually have this one fixed though. You can contact Hannes Reinecke . I think he gets the suse bugzilla for iscsi too, so either way you will reach him. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/open-iscsi -~--~~~~--~~--~--~---
Re: Null pointer dereference during iSCSI login
On 2 Mar 2009 at 7:46, Konrad Rzeszutek wrote:
>
> On Mon, Mar 02, 2009 at 10:53:19AM +0100, Ulrich Windl wrote:
> >
> > Hello,
> >
> > with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem
> > during
> > login using "iscsiadm -m node -L automatic". After a few logins, login
> > suddenly
>
> What happens if you use the latest version of Open-iSCSI kernel modules and
> Open-iSCSI utils?
> (You will need to patch the kernel directory with the
> kernel/2.6.16-suse.patch for them to compile).
Unfortunately I have no development environment ready at the moment, and the
machine is serving some production users. Plans are to upgrade to a newer
service
pack, but I thought this problem could be interesting to examine.
I can apply ksymoops to dmesg output:
Unable to handle kernel NULL pointer dereference at 0232 RIP:
{inet_sendmsg+23}
Oops: [1] SMP
CPU 3
Pid: 25485, comm: scsi_wq_25 Not tainted 2.6.16.54-0.2.11-xen #1
RIP: e030:[] {inet_sendmsg+23}
Using defaults from ksymoops -t elf64-x86-64 -a i386:x86-64
RSP: e02b:880011e0db78 EFLAGS: 00010296
RAX: 802f1c40 RBX: RCX: 0200
RDX: 880011e0dd58 RSI: 8800080988c0 RDI: 880011e0dba8
RBP: 0200 R08: 0200 R09: 8000
R10: dbb545c6 R11: 0001 R12: 880011e0dd58
R13: 880011e0dba8 R14: 88000bdc52c0 R15: 0200
FS: 2b77ef71e6d0() GS:803a2180() knlGS:
CS: e033 DS: ES:
Stack: 0030 8800080988c0 0200 880011e0dd58
8026e1da 0018 880011e0e000
0001
Call Trace: {sock_sendmsg+249}
{__kprobes_text_start+845}
{autoremove_wake_function+0}
{__alloc_pages+101}
{kernel_sendmsg+53}
{sock_no_sendpage+130}
{monotonic_clock+53}
{:iscsi_tcp:iscsi_tcp_mtask_xmit+502}
{:libiscsi:iscsi_xmitworker+0}
{:libiscsi:iscsi_xmit_mtask+84}
{:libiscsi:iscsi_xmitworker+310}
{run_workqueue+148}
{worker_thread+0}
{keventd_create_kthread+0}
{worker_thread+240}
{default_wake_function+0}
{keventd_create_kthread+0}
{keventd_create_kthread+0}
{kthread+212} {child_rip+8}
{keventd_create_kthread+0}
{kthread+0}
{child_rip+0}
Code: 66 83 bb 32 02 00 00 00 75 0c 48 89 df e8 ad f5 ff ff 85 c0
>>RIP; 802ba089<=
>>RAX; 802f1c40
>>RDX; 880011e0dd58 <__start___xen_guest+880011a15a78/7fd07d20>
>>RSI; 8800080988c0 <__start___xen_guest+880007ca05e0/7fd07d20>
>>RDI; 880011e0dba8 <__start___xen_guest+880011a158c8/7fd07d20>
>>R10; dbb545c6 <__start___xen_guest+db75c2e6/7fd07d20>
>>R12; 880011e0dd58 <__start___xen_guest+880011a15a78/7fd07d20>
>>R13; 880011e0dba8 <__start___xen_guest+880011a158c8/7fd07d20>
>>R14; 88000bdc52c0 <__start___xen_guest+88000b9ccfe0/7fd07d20>
Trace; 8026e1da
Trace; 8014195d
Trace; 8026fac1
Trace; 8010df38
Trace; 8839ba18 <_end+7f1151c/7f175b04>
Trace; 8839bb4e <_end+7f11652/7f175b04>
Trace; 8013e34e
Trace; 8013e43e
Trace; 80141582
Trace; 80141826
Trace; 80141582
Trace; 8010baae
Code; 802ba089
<_RIP>:
Code; 802ba089<=
0: 66 83 bb 32 02 00 00 cmpw $0x0,0x232(%rbx) <=
Code; 802ba090
7: 00
Code; 802ba091
8: 75 0c jne16 <_RIP+0x16>
Code; 802ba093
a: 48 89 df mov%rbx,%rdi
Code; 802ba096
d: e8 ad f5 ff ffcallq f5bf
<_RIP+0xf5bf>
Code; 802ba09b
12: 85 c0 test %eax,%eax
CR2: 0232
>
> I see the 'kprobes' symbol in there - do you have any of them loaded?
Not that I knew; I only had heard the word before, but never did anything with
that.
Regards,
Ulrich
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Re: Null pointer dereference during iSCSI login
On Mon, Mar 02, 2009 at 10:53:19AM +0100, Ulrich Windl wrote: > > Hello, > > with SLES10 SP1 on x86_64 (open-iscsi-2.0.707-0.32) I'm seeing a problem > during > login using "iscsiadm -m node -L automatic". After a few logins, login > suddenly What happens if you use the latest version of Open-iSCSI kernel modules and Open-iSCSI utils? (You will need to patch the kernel directory with the kernel/2.6.16-suse.patch for them to compile). I see the 'kprobes' symbol in there - do you have any of them loaded? --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to open-iscsi+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/open-iscsi -~--~~~~--~~--~--~---
Re: Null pointer dereference during iSCSI login
Hi!
As an add-on to this problem: Any subsequent attempt to run "iscsiadm -m node
-L
automatic" just silently hangs. Trace follows:
# strace iscsiadm -m node -L automatic
execve("/sbin/iscsiadm", ["iscsiadm", "-m", "node", "-L", "automatic"], [/* 56
vars */]) = 0
brk(0) = 0x522000
[...]
umask(0177) = 022
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, pa...@iscsiadm_abstract_namespace}, 110) = 0
write(3, "\10\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 2504) =
2504
recvfrom(3,
Regards,
Ulrich
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