apport information ** Tags added: apport-collected xenial
** Description changed: Firstly, apologies if this isn't a bug in cifs.mount - I know it's intimitly connected to a recent kernel updates which changed the default SMB version cifs connects with, but I'm having trouble distinguishing whether this behaviour is caused by the kernel change or a problem with cifs. On a recently built 16.04.3 LTS box with kernel 4.4.0-109, I was able to mount to a network DFS share with the following mount.cifs -o user=username //pathto/share /mountpoint and after doing so, I was able to navigate through the mounted share, and through the underlying DFS structure with no problems. The mount command notably contained 'vers=1.0' - which was expected. After updating the kernel to 4.13.0.32, if I run the same command, the share appears to mount, but I get a 'cannot access ...: Input/Output error' when trying to move through a DFS mount within the mounted filesystem. Notably, the output from the mount command has 'vers=default'. I understand from various sources, that the default SMB vers is now 3.0 - and if I mount this share explicitly with mount.cifs -o user=username,vers=3.0 //pathto/share /mountpoint Then I see 'vers=3' on the output from mount, and am able to use the share as expected. The man page for the cifs.mount cmd still says the default is SMB1.0 (this appeared to be the case with a kernel previous to 4.13). The kernel sources now say the default is SMB 3.0 - which would also be find, if the share is mounted with vers=3.0. But instead I'm seeing 'vers=default' - and I'm unsure as to what version of SMB it's actually trying to use (if any) - whatever it is, it doesn't work unless I explicitly set vers=3.0. Thanks Dave + --- + AlsaDevices: + total 0 + crw-rw---- 1 root audio 116, 1 Feb 13 12:02 seq + crw-rw---- 1 root audio 116, 33 Feb 13 12:02 timer + AplayDevices: Error: [Errno 2] No such file or directory + ApportVersion: 2.20.1-0ubuntu2.15 + Architecture: amd64 + ArecordDevices: Error: [Errno 2] No such file or directory + AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: + CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found. + DistroRelease: Ubuntu 16.04 + HibernationDevice: RESUME=UUID=4d912473-ae08-4591-886b-eff2cb5edfd9 + InstallationDate: Installed on 2017-07-11 (217 days ago) + InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8) + IwConfig: Error: [Errno 2] No such file or directory + Lsusb: Error: command ['lsusb'] failed with exit code 1: + MachineType: VMware, Inc. VMware Virtual Platform + Package: linux (not installed) + PciMultimedia: + + ProcFB: + + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-32-generic root=UUID=d702a195-430c-4bf2-9753-6618837863dc ro + ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13 + RelatedPackageVersions: + linux-restricted-modules-4.13.0-32-generic N/A + linux-backports-modules-4.13.0-32-generic N/A + linux-firmware 1.157.15 + RfKill: Error: [Errno 2] No such file or directory + Tags: xenial + Uname: Linux 4.13.0-32-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: oracle + _MarkForUpload: True + dmi.bios.date: 04/05/2016 + dmi.bios.vendor: Phoenix Technologies LTD + dmi.bios.version: 6.00 + dmi.board.name: 440BX Desktop Reference Platform + dmi.board.vendor: Intel Corporation + dmi.board.version: None + dmi.chassis.asset.tag: No Asset Tag + dmi.chassis.type: 1 + dmi.chassis.vendor: No Enclosure + dmi.chassis.version: N/A + dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd04/05/2016:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A: + dmi.product.name: VMware Virtual Platform + dmi.product.version: None + dmi.sys.vendor: VMware, Inc. ** Attachment added: "CurrentDmesg.txt" https://bugs.launchpad.net/bugs/1749214/+attachment/5054389/+files/CurrentDmesg.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1749214 Title: default vers value when mounting cifs shares with mount.cifs not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1749214/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
