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commit 81bcd8b7 breaks CIFS mount

Regression Jongman Heo 1 participant 1 message Dec 14, 2012

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SMB client (CIFS) Kernel SMB3 server (ksmbd)
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Jongman Heo

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sec=ntlm works, sec=ntlmv2 does not.

I don't know well about the Windows 7 setting.
But there was no LmCompatibilityLevel key in the registry, HKLM\SYSTEM\CurrentControlSet\Control\Lsa. So, I created the key and tried with DWORD value 0 and 1. But in both case, only sec=ntlm works.

Regards,
Jongman Heo.

------- Original Message -------
Sender : Steve French<[email protected]>
Date : 2012-12-14 14:05 (GMT+09:00)
Title : Re: [Regression] commit 81bcd8b7 breaks CIFS mount

Windows 7 should support nltmspp.

First verify that mounting with ntlm (e.g. specifying "sec=ntlm" on mount) works (after that unmount and also try mounting with "sec=ntlmv2" to see if "raw" ntlmv2 instead of ntlmv2 in ntlmssp works). Second check your registry setting on Windows 7 server to make sure that you did not disable ntlmv2

Quoted 36 lines · Jongman Heo

Hi,

commit 81bcd8b7 breaks CIFS mount in my Fedora 16 and Fedora 17 machines, with following error message.

    [   51.119251] Status code returned 0xc000005e NT_STATUS_NO_LOGON_SERVERS
    [   51.119259] CIFS VFS: Send error in SessSetup = -5
    [   51.119476] CIFS VFS: cifs_mount failed w/return code = -5

FYI, remotetarget is Windows 7.

Reverting the commit 81bcd8b7 fixes the mount problem.

I read the commit message, is this intended behavior? Then how can I resolve my issue withour reverting the commit? Need to install some package, or change system configuration?

git bisect log attached.

# git bisect log
git bisect start '--' 'fs/cifs'
# bad: [66cdd0ceaf65a18996f561b770eedde1d123b019] Merge tag 'kvm-3.8-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
git bisect bad 66cdd0ceaf65a18996f561b770eedde1d123b019
# good: [29594404d7fe73cd80eaa4ee8c43dcc53970c60e] Linux 3.7
git bisect good 29594404d7fe73cd80eaa4ee8c43dcc53970c60e
# bad: [1cc9bd68617f2a92dcd6e4398288341d16cfb5c1] make convert_delimiter use strchr instead of open-coding it
git bisect bad 1cc9bd68617f2a92dcd6e4398288341d16cfb5c1
# bad: [d3d1fce11dbbf4246f1c37839b13757f08aec3b7] cifs: don't override the uid/gid in getattr when cifsacl is enabled
git bisect bad d3d1fce11dbbf4246f1c37839b13757f08aec3b7
# bad: [852e22950dc47e774bb602b16f55fed42afac5fb] cifs: use the NUM_AUTHS and NUM_SUBAUTHS constants in cifsacl code
git bisect bad 852e22950dc47e774bb602b16f55fed42afac5fb
# bad: [60654ce047f7be62afa291573501e011297a47d8] cifs: fix types on module parameters
git bisect bad 60654ce047f7be62afa291573501e011297a47d8
# bad: [81bcd8b795229c70d7244898efe282846e3b14ce] default authentication needs to be at least ntlmv2 security for cifs mounts
git bisect bad 81bcd8b795229c70d7244898efe282846e3b14ce
Signature · 2 lines
Thanks,
Steve