apport information ** Attachment added: "ProcInterrupts.txt" https://bugs.launchpad.net/bugs/1862858/+attachment/5327622/+files/ProcInterrupts.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1862858 Title: CIFS acesses DFS referral with wrong Kerberos ticket Status in linux package in Ubuntu: Incomplete Bug description: kubuntu 19.10 with kernel 5.3.0-29-generic and64. This looks like a regression in the kernel CIFS module after the 4.15 & 5.0 kernels. These earlier kernels follow the DFS referrals without error. The problem: - Use mount.cifs with kerberos authentication to mount a samba server hosting a DFS root. You will get a KRB ticket for the "dfs_root" machine. - Attempt to access a host a host via a DFS referral (call this "target_host") - Access will fail with "Permission Denied". - Use Wireshark to monitor CIFS and KRB traffic. - The kernel attempts to authenticate to "target_host" using the KRB ticket for "dfs_root". Note: - A DFS target running Win2008R2 will reply with STATUS_MORE_PROCESSING_REQUIRED, then the kernel will get a KRB ticket for "target_host" and use it. The connection is then successful. - A DFS target running Samba 4.7.6 will reply with STATUS_LOGON_FAILURE. The connection fails. Expected Result: - Successful connection. - The kernel should get a KRB ticket for "target_host" and use it. (This is what kernels 4.15 and 5.0 do [and a Windows client]) --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC3: stephen 1839 F.... pulseaudio /dev/snd/controlC2: stephen 1839 F.... pulseaudio /dev/snd/controlC0: stephen 1839 F.... pulseaudio /dev/snd/controlC1: stephen 1839 F.... pulseaudio CurrentDesktop: KDE DistroRelease: Ubuntu 19.10 HibernationDevice: RESUME=UUID=4df5ccea-5eb4-45e3-a0b0-7b1311fdaba5 InstallationDate: Installed on 2018-11-09 (459 days ago) InstallationMedia: Kubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2) MachineType: Gigabyte Technology Co., Ltd. GA-MA790X-UD4P NonfreeKernelModules: nvidia_modeset nvidia Package: linux (not installed) ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-5.3.0-29-generic root=UUID=f009da0b-176e-49e6-a6a0-bb594e6754a8 ro rootflags=subvol=@ ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13 RelatedPackageVersions: linux-restricted-modules-5.3.0-29-generic N/A linux-backports-modules-5.3.0-29-generic N/A linux-firmware 1.183.3 RfKill: Tags: eoan Uname: Linux 5.3.0-29-generic x86_64 UpgradeStatus: Upgraded to eoan on 2019-10-20 (114 days ago) UserGroups: adm bacula cdrom kvm libvirt lpadmin plugdev sambashare sudo wireshark _MarkForUpload: True dmi.bios.date: 09/08/2010 dmi.bios.vendor: Award Software International, Inc. dmi.bios.version: F10c dmi.board.name: GA-MA790X-UD4P dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF10c:bd09/08/2010:svnGigabyteTechnologyCo.,Ltd.:pnGA-MA790X-UD4P:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-MA790X-UD4P:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr: dmi.product.name: GA-MA790X-UD4P dmi.sys.vendor: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1862858/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
