{"action":"created","issue":{"url":"https://api.github.com/repos/zfsonlinux/zfs/issues/5156","repository_url":"https://api.github.com/repos/zfsonlinux/zfs","labels_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/5156/labels{/name}","comments_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/5156/comments","events_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/5156/events","html_url":"https://github.com/zfsonlinux/zfs/issues/5156","id":178884532,"number":5156,"title":"Standard Userspace Executables Throw General Protection Faults During Tests","user":{"login":"tcaputi","id":1920053,"avatar_url":"https://avatars.githubusercontent.com/u/1920053?v=3","gravatar_id":"","url":"https://api.github.com/users/tcaputi","html_url":"https://github.com/tcaputi","followers_url":"https://api.github.com/users/tcaputi/followers","following_url":"https://api.github.com/users/tcaputi/following{/other_user}","gists_url":"https://api.github.com/users/tcaputi/gists{/gist_id}","starred_url":"https://api.github.com/users/tcaputi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/tcaputi/subscriptions","organizations_url":"https://api.github.com/users/tcaputi/orgs","repos_url":"https://api.github.com/users/tcaputi/repos","events_url":"https://api.github.com/users/tcaputi/events{/privacy}","received_events_url":"https://api.github.com/users/tcaputi/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":{"url":"https://api.github.com/repos/zfsonlinux/zfs/milestones/11","html_url":"https://github.com/zfsonlinux/zfs/milestones/0.7.0","labels_url":"https://api.github.com/repos/zfsonlinux/zfs/milestones/11/labels","id":7013,"number":11,"title":"0.7.0","description":"ZFS on Linux v0.7.0 - Memory management\r\n\r\n","creator":{"login":"behlendorf","id":148917,"avatar_url":"https://avatars.githubusercontent.com/u/148917?v=3","gravatar_id":"","url":"https://api.github.com/users/behlendorf","html_url":"https://github.com/behlendorf","followers_url":"https://api.github.com/users/behlendorf/followers","following_url":"https://api.github.com/users/behlendorf/following{/other_user}","gists_url":"https://api.github.com/users/behlendorf/gists{/gist_id}","starred_url":"https://api.github.com/users/behlendorf/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/behlendorf/subscriptions","organizations_url":"https://api.github.com/users/behlendorf/orgs","repos_url":"https://api.github.com/users/behlendorf/repos","events_url":"https://api.github.com/users/behlendorf/events{/privacy}","received_events_url":"https://api.github.com/users/behlendorf/received_events","type":"User","site_admin":false},"open_issues":54,"closed_issues":297,"state":"open","created_at":"2011-05-03T17:38:46Z","updated_at":"2016-09-23T17:16:28Z","due_on":null,"closed_at":null},"comments":1,"created_at":"2016-09-23T13:57:24Z","updated_at":"2016-09-23T17:23:43Z","closed_at":null,"body":"There are now 2 open pull requests against the current upstream/master that have exhibited some strange behavior on the Amazon SIMD build slave. While running the buildbot tests, standard userspace applications begin segfaulting. In my experience, this usually means that some memory in the kernel module is being double freed after it is already allocated to a new proccess or the kernel module is overwriting memory it does not own.\r\n\r\nHere are the 2 pull requests that are exhibiting the issue (one of which makes very minimal changes). In the first one, sudo starts throwing general protection faults in ld.so. The second throws general protection faults in wget:\r\n\r\nhttp://build.zfsonlinux.org/builders/Amazon%202015.09%20x86_64%20SIMD%20%28TEST%29/builds/1817\r\nhttp://build.zfsonlinux.org/builders/Amazon%202015.09%20x86_64%20SIMD%20%28TEST%29/builds/1796\r\n"},"comment":{"url":"https://api.github.com/repos/zfsonlinux/zfs/issues/comments/249252186","html_url":"https://github.com/zfsonlinux/zfs/issues/5156#issuecomment-249252186","issue_url":"https://api.github.com/repos/zfsonlinux/zfs/issues/5156","id":249252186,"user":{"login":"behlendorf","id":148917,"avatar_url":"https://avatars.githubusercontent.com/u/148917?v=3","gravatar_id":"","url":"https://api.github.com/users/behlendorf","html_url":"https://github.com/behlendorf","followers_url":"https://api.github.com/users/behlendorf/followers","following_url":"https://api.github.com/users/behlendorf/following{/other_user}","gists_url":"https://api.github.com/users/behlendorf/gists{/gist_id}","starred_url":"https://api.github.com/users/behlendorf/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/behlendorf/subscriptions","organizations_url":"https://api.github.com/users/behlendorf/orgs","repos_url":"https://api.github.com/users/behlendorf/repos","events_url":"https://api.github.com/users/behlendorf/events{/privacy}","received_events_url":"https://api.github.com/users/behlendorf/received_events","type":"User","site_admin":false},"created_at":"2016-09-23T17:23:43Z","updated_at":"2016-09-23T17:23:43Z","body":"The first one you've listed is particularly interesting because we've barely just loaded the spl and splat kernel modules when it occurs.  And none of the zfs kernel modules will have ever been installed on this new VM.  If this was caused by a kernel double free it was caused by something in either the spl or splat modules which happened at module load time."}}
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