Kernel 3.0.101-0.47.55 cifs mounts broken (KERNEL CIFS)
This document (7016703) is provided subject to the disclaimer at the end of this document.
SUSE Linux Enterprise Server 11 Service Pack 4 (SLES 11 SP4)
Jul 4 11:19:07 mercury kernel: [41870.280427] CIFS VFS: cifs_calc_signature2: Can't generate signatureother services are unaffected and everything was working perfectly until after the server reboot or loading of the new cifs kernel module.
Jul 4 11:19:07 mercury kernel: [41870.280432]
Jul 4 11:19:07 mercury kernel: [41870.280439] CIFS VFS: Send error in SessSetup = -1
Jul 4 11:19:07 mercury kernel: [41870.280626] CIFS VFS: cifs_mount failed w/return code = -1
After patching, when encountering the additional error (listed below) about packet signing, it may be required to add the sec=ntlmv2i option to the mount command or edit the security flags to enable signing. This is do to the fact that in this scenario the server *REQUIRES* SMB signatures or packet signing.
Aug 7 14:26:30 srv01 kernel: [90560.145451] CIFS VFS: cifs_calc_signature2: Can't generate signature
Aug 7 14:26:30 srv01 kernel: [90560.145452]
Aug 7 14:26:30 srv01 kernel: [90560.145454] CIFS VFS: Send error in SessSetup = -1
Aug 7 14:26:30 srv01 kernel: [90560.145486] CIFS VFS: cifs_mount failed w/return code = -1
Aug 7 14:27:16 srv01 kernel: [90606.436709] CIFS VFS: Server requires packet signing to be enabled in /proc/fs/cifs/SecurityFlags.
Aug 7 14:27:16 srv01 kernel: [90606.436746] CIFS VFS: cifs_mount failed w/return code = -95
When receiving the following error (as listed below) when using the option sec=ntlmv2i, then please proceed using the option sec=ntlmsspi instead.
Aug 12 20:12:56 sles11 kernel: [ 3725.415369] Status code returned 0xc000000d NT_STATUS_INVALID_PARAMETER
Aug 12 20:12:56 sles11 kernel: [ 3725.415376] CIFS VFS: Send error in SessSetup = -22
Aug 12 20:12:56 sles11 kernel: [ 3725.415428] CIFS VFS: cifs_mount failed w/return code = -22
- Update to any SLES 11 SP3 Kernel with a higher version than 3.0.101-0.47.55 if available.
Until this is available download and install PTF Kernels from
For SLES 11 SP4:
- PTFs are available at:
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- Document ID:7016703
- Creation Date: 23-Jul-2015
- Modified Date:12-Oct-2022
- SUSE Linux Enterprise Server
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