Tr:Re: Tr:Re: CIFS VFS: Unexpected SMB signature ...NULL inode in lookup

Discussion:

sergio.conrad-QFKgK+

2013-11-20 14:21:12 UTC

Thanks for your response .

I did my tests with a Centos =C2=A02.6.32-358.23.2.el6.i686 up to date,=
it don't seems to=20
backport the update.

Could the latest kernel from a Fedora incorporate the update ? it seems=
to be=C2=A03.11.x
I will check either if =C2=A0Scientific Linux do this. How could I know=
before installing ?
=C2=A0
Thanks
Serge
=C2=A0

Message du 20/11/13 15:17
A : "Jeff Layton"
Objet : Re: Tr:Re: CIFS VFS: Unexpected SMB signature ...NULL inode i=

n lookup
=C2=A0

Message du 20/11/13 12:33
De : "Jeff Layton"
Copie =C3=A0 : "linux-cifs vger kernel org"
Objet : Re: Tr:Re: CIFS VFS: Unexpected SMB signature ...NULL inode i=

n lookup

On Wed, 20 Nov 2013 12:22:08 +0100

=C2=A0
for num in $(seq 1 200)
do=C2=A0
dd if=3D/dev/zero of=3Dcifsmount/file${num} bs=3D1024 count=3D1000
done
=C2=A0
Execute the script, and send control-C several time when running
50 % chance i got unexpected SMB signature
=C2=A0any idea ?

You need a more recent kernel, or a backport of commit
ad313cb86dfba27f8f2306da304974ef17c91c56.

=C2=A0

Message du 20/11/13 08:48
Objet : Re: CIFS VFS: Unexpected SMB signature ...NULL inode in l=

ookup

Hello
I have open a bug quite a while ago https://bugzilla.samba.org/sh=

ow_bug.cgi?id=3D9477=20
and

don't have any news.

I am using sec=3Dkrb5i, but have the same problem with ntlmv2...
The problem is the same with a centos 6 computer.
Perhaps the problem is in the Windows Server ...
Do I have to change AllowLegacySrvCall as described in

http://support.microsoft.com/kb/957441 ?

Perhaps I have to put a more recent driver in my server: It is a =

Dell T610 server

with a NetExtreme II gigabitE (version 5.2.14 17/12/2009) ?
Please help , as the problems continue ...
Thanks
Serge Conrad
Hello ...
in the messages, you could see an SMB unexpected signature (21 Ja=

n 16:13:16)

In the dump file , the trame no 470 is at the same time (16:13:16=

)

The environnement is the same as described in=20

https://bugzilla.samba.org/show_bug.cgi?

id=3D9477

Regards,
Serge

Message du 25/01/13 16:15
De : "Steve French"
A : "sergio. conrad"
Objet : Re: CIFS VFS: Unexpected SMB signature ...NULL inode in=

lookup

You could send the trace to me directly

Hello
I do have a network trace for
https://bugzilla.samba.org/show_bug.cgi?id=3D9477
But there is the public adress ip of the server in the trace.=

I don't know

how to hide
this. Could I send the trace to you, or must I find a way to =

hide the

trace ?
Thanks
Serge

Message du 05/12/12 16:18
De : "Steve French"
A : "sergio.conrad"
Objet : Re: CIFS VFS: Unexpected SMB signature ...NULL inod=

e in lookup

Could you open a bugzilla bug at bugzilla.samba.org and if =

possible

attach a network trace around the time that this is trigger=

ed (if it

is trivial to reproduce)
https://wiki.samba.org/index.php/Capture_Packets

Hello,
The log are from 2.6.43.8-1.fc15.x86_64.
I see also the error CIFS VFS: Unexpected SMB signature w=

ith the same

environnement
on a 3.6.6-1.fc16.x86_64

Thanks,
Serge

Message du 04/12/12 20:06
De : "Steve French"
A : "sergio.conrad"
Objet : Re: CIFS VFS: Unexpected SMB signature ...NULL i=

node in lookup

What kernel version?
I would not expect the "noserverino" mount option to be =

a factor.

Jeff did fix one warning relating to unexpected signatur=

es in this

patch, see below (which I don't think is your issue (if =

the signature

is coming on a transact2 request).
commit 9c4843ea576107a3c1fb94f2f758f198e9fe9e54
Author: Jeff Layton
Date: Mon Jun 6 15:40:23 2011 -0400
cifs: silence printk when establishing first session on =

socket

When signing is enabled, the first session that's establ=

ished on a

CIFS VFS: Unexpected SMB signature
This is because the key exchange hasn't happened yet, so=

the signature

field is bogus. Don't try to check the signature on the =

socket until

the

first session has been established. Also, eliminate the =

specific check

for SMB_COM_NEGOTIATE since this check covers that case =

too.

Hi,
I have a problem with users losing their connections f=

rom linux

clients with cifs
share. (Windows 2008) :CIFS VFS: Unexpected SMB signature

I am using two methods for mounting: pam_mount and aut=

ofs, both

with same results.

I am using mount options nounix,noserverino
I am lauching cifs module on boot (rc.local) with
modprobe cifs
echo 0 > /proc/fs/cifs/OplockEnabled
echo 1 > /proc/fs/cifs/MultiuserMount
echo 7 > /proc/fs/cifs/cifsFYI
in /var/log/messages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=

=3D=3D=3D

Dec 3 17:31:01 u1205-08l kernel: [ 3732.140040] CIFS V=

Unexpected lookup error
-512

Dec 3 17:31:01 u1205-08l kernel: [ 3732.334939] CIFS V=

Unexpected SMB signature

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

cifs.spnego;0;0;3f000000
=20

;ver=3D0x2;host=3Dfigue;ip4=3D130.xxx.xxx.xxx;sec=3Dkrb5;uid=3D0x100000=
5;creduid=3D0x1000005;us

er=3D21206xxx;pid=3D0x65f
Dec 3 16:29:35 u1205-08l cifs.upcall: ver=3D2
Dec 3 16:29:35 u1205-08l cifs.upcall: host=3Dfigue
Dec 3 16:29:35 u1205-08l cifs.upcall: ip=3D130.120.8.1=

Dec 3 16:29:35 u1205-08l cifs.upcall: sec=3D1
Dec 3 16:29:35 u1205-08l cifs.upcall: uid=3D16777221
Dec 3 16:29:35 u1205-08l cifs.upcall: creduid=3D167772=

Dec 3 16:29:35 u1205-08l cifs.upcall: user=3D21206xxx
Dec 3 16:29:35 u1205-08l cifs.upcall: pid=3D1631
Dec 3 16:29:35 u1205-08l cifs.upcall: find_krb5_cc: co=

nsidering

/tmp/krb5cc_167

77221

FILE:/tmp/krb5cc_16777221 i

s valid ccache
in dmesg
=3D=3D=3D=3D=3D=3D=3D=3D=3D
fs/cifs/inode.c: Getting info on \21206xxx\TP9
[ 3735.419612] fs/cifs/transport.c: For smb_command 50
[ 3735.419615] fs/cifs/transport.c: Sending smb: total=

_len 104

[ 3735.420257] fs/cifs/connect.c: RFC1002 header 0x23
[ 3735.420261] fs/cifs/connect.c: invalid transact2 wo=

rd count

[ 3735.422403] fs/cifs/transport.c: cifs_sync_mid_resu=

lt: cmd=3D50

mid=3D37012 state=3D4

[ 3735.422406] CIFS VFS: Unexpected SMB signature
[ 3735.422408] Status code returned 0xc0000022

NT_STATUS_ACCESS_DENIED

[ 3735.422411] fs/cifs/netmisc.c: Mapping smb error co=

de 0xc0000022

to POSIX err
-13

[ 3735.422413] fs/cifs/cifssmb.c: Send error in QPathI=

nfo =3D -13

[ 3735.422415] fs/cifs/dir.c: CIFS VFS: leaving cifs_l=

ookup (xid =3D

76854) rc =3D -13

[ 3735.422424] fs/cifs/dir.c: CIFS VFS: in cifs_lookup=

16777221

[ 3735.422427] fs/cifs/dir.c: parent inode =3D 0xf1448=

TP9 and dentry =3D
0xf074e300

[ 3735.422429] fs/cifs/dir.c: NULL inode in lookup
[ 3735.422430] fs/cifs/dir.c: Full path: \21206xxx\TP9=

inode =3D 0x

(null)

I don't understand what happens...
NULL inode in lookup ... What about noserverino option=

Perhaps an unresponsive server... The network infrastr=

ucture is

old. Last year I
got this working very well, but the server was in a better pl=

ace (switch

and network
infrastructure speaking)

Regards,
Thanks in advance
Serge Conrad
Une messagerie gratuite, garantie =C3=A0 vie et des se=

rvices en plus, =C3=A7a

vous tente ?

Je cr=C3=A9e ma bo=C3=AEte mail www.laposte.net
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Jeff Layton

2013-11-20 15:43:20 UTC

Permalink

On Wed, 20 Nov 2013 15:21:12 +0100

Post by sergio.conrad-QFKgK+
=20
Thanks for your response .
=20
I did my tests with a Centos =C2=A02.6.32-358.23.2.el6.i686 up to dat=

e, it don't seems to=20

Post by sergio.conrad-QFKgK+
backport the update.
=20

Yeah, I think those patches are going into RHEL6.5.

Post by sergio.conrad-QFKgK+
Could the latest kernel from a Fedora incorporate the update ? it see=

ms to be=C2=A03.11.x

Post by sergio.conrad-QFKgK+
I will check either if =C2=A0Scientific Linux do this. How could I kn=

ow before installing ?

Post by sergio.conrad-QFKgK+
=C2=A0

SL is basically a clone of RHEL, not Fedora. Fedora has had these
patches for a long time now.