{"action":"created","issue":{"url":"https://api.github.com/repos/QubesOS/qubes-issues/issues/4270","repository_url":"https://api.github.com/repos/QubesOS/qubes-issues","labels_url":"https://api.github.com/repos/QubesOS/qubes-issues/issues/4270/labels{/name}","comments_url":"https://api.github.com/repos/QubesOS/qubes-issues/issues/4270/comments","events_url":"https://api.github.com/repos/QubesOS/qubes-issues/issues/4270/events","html_url":"https://github.com/QubesOS/qubes-issues/issues/4270","id":356283546,"node_id":"MDU6SXNzdWUzNTYyODM1NDY=","number":4270,"title":"SAMBA unpleasantly broken on Debian VMs  with kernel 4.14.57-1, kernel 4.9.56-21 and below unaffected 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Qubes OS version:\r\n<!-- (e.g., `R3.2`)\r\n     You can get it from the dom0 terminal with the command\r\n         `cat /etc/qubes-release`\r\n     Type below this line. -->\r\n\r\nR 3.2\r\n\r\n\r\n\r\n<!-- Type above this line. -->\r\n### Affected component(s): \r\n<!-- Type below this line. -->\r\n\r\nDebian VMs irrespective of debian version\r\n\r\nspecifically affected are samba server&client, samba client affected especially strongly\r\n\r\n\r\n<!-- Type above this line. -->\r\n---\r\n<!--------------------------->\r\n### Steps to reproduce the behavior:\r\n<!-- Use single backticks (`) for in-line code snippets and\r\n     triple backticks (```) for code blocks.\r\n     Type below this line. -->\r\n\r\n\r\nHave a samba server serving something from one VM, and a samba client mounting it from another VM\r\n\r\nthe client invocation would be something like \r\n_sudo mount.cifs //[SERVER-VM-IP/MYSHARE /rw/SHAREMOUNT --verbose -o  uid=user,gid=user,username=[samba_user_username],password=[samba_user_password],domain=WORKGROUP,vers=3.0_\r\n\r\nnote the vers line, it kind of matters here\r\n\r\n<!-- Type above this line. -->\r\n### Expected behavior:\r\n<!-- Type below this line. -->\r\n\r\n\r\nsamba to get mounted and be writable\r\n\r\n\r\n<!-- Type above this line. -->\r\n### Actual behavior:\r\n<!-- Type below this line. -->\r\n\r\nsamba share mounts, but attempt to [edited] write to the share or delete file from the share [/edited] causes the VM to crash instantly, with no logs formed.\r\n\r\nAlso sometimes instantly crashes the server.\r\n\r\n**Additional symptom:**\r\nthere is CIFS VFS: ioctl error in smb2_get_dfs_refer rc=-2\" in dmesg\r\n\r\n**Additional symptom 2:**\r\n\r\ninvoking it with vers 1.0 does not produce error in dmesg and does not cause crashes but samba 1.0 is bad news.\r\n\r\n\r\n\r\n<!-- Type above this line. -->\r\n### General notes:\r\n<!-- Type below this line. -->\r\n\r\nUsing kernel 4.9.56-21 works okay.\r\n\r\nThe issue appears to be a debian issue or related to it based on log behavior and some of the bug's behavior ([link related](https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748689) ) but the \"whole machine crash\" is not described in debian issue linked, so there may be Qubes-specific stuff here.\r\n\r\n\r\n<!-- Type above this line. -->\r\n---\r\n<!--------------------------->\r\n### Related issues:\r\n<!-- Type below this line. -->\r\n\r\n\r\n\r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/QubesOS/qubes-issues/issues/comments/418280197","html_url":"https://github.com/QubesOS/qubes-issues/issues/4270#issuecomment-418280197","issue_url":"https://api.github.com/repos/QubesOS/qubes-issues/issues/4270","id":418280197,"node_id":"MDEyOklzc3VlQ29tbWVudDQxODI4MDE5Nw==","user":{"login":"arjan-s","id":10400299,"node_id":"MDQ6VXNlcjEwNDAwMjk5","avatar_url":"https://avatars1.githubusercontent.com/u/10400299?v=4","gravatar_id":"","url":"https://api.github.com/users/arjan-s","html_url":"https://github.com/arjan-s","followers_url":"https://api.github.com/users/arjan-s/followers","following_url":"https://api.github.com/users/arjan-s/following{/other_user}","gists_url":"https://api.github.com/users/arjan-s/gists{/gist_id}","starred_url":"https://api.github.com/users/arjan-s/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/arjan-s/subscriptions","organizations_url":"https://api.github.com/users/arjan-s/orgs","repos_url":"https://api.github.com/users/arjan-s/repos","events_url":"https://api.github.com/users/arjan-s/events{/privacy}","received_events_url":"https://api.github.com/users/arjan-s/received_events","type":"User","site_admin":false},"created_at":"2018-09-04T08:12:25Z","updated_at":"2018-09-04T08:12:25Z","author_association":"NONE","body":"This is a known issue in kernels 4.14.55 - 4.14.58"}}
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