{"issue":{"state":"closed","pull_request":{"diff_url":null,"html_url":null,"patch_url":null},"user":{"avatar_url":"https://secure.gravatar.com/avatar/ea1f5fb7eefd51c5d308e2b78dbdf921?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","gravatar_id":"ea1f5fb7eefd51c5d308e2b78dbdf921","url":"https://api.github.com/users/behlendorf","login":"behlendorf","id":148917},"milestone":{"state":"open","open_issues":19,"url":"https://api.github.com/repos/zfsonlinux/zfs/milestones/16","due_on":"2011-10-31T07:00:00Z","description":"Target a seventh release candidate to address the next group of critical issues which are blocking the first official stable release.\r\n","creator":{"avatar_url":"https://secure.gravatar.com/avatar/ea1f5fb7eefd51c5d308e2b78dbdf921?d=https://a248.e.akamai.net/assets.github.com%2Fimages%2Fgravatars%2Fgravatar-140.png","gravatar_id":"ea1f5fb7eefd51c5d308e2b78dbdf921","url":"https://api.github.com/users/behlendorf","login":"behlendorf","id":148917},"number":16,"title":"0.6.0-rc7","closed_issues":22,"created_at":"2011-09-29T21:59:59Z"},"assignee":null,"labels":[{"name":"Bug","color":"e10c02","url":"https://api.github.com/repos/zfsonlinux/zfs/labels/Bug"}],"updated_at":"2011-11-03T20:55:50Z","closed_at":"2011-11-03T20:55:50Z","comments":32,"url":"https://api.github.com/repos/zfsonlinux/zfs/issues/287","body":"Reported on the zfs-discuss list by Tommy Cheng.\r\n\r\n---\r\n\r\nI am running a VM that is doing unrar via NFS to the host computer's\r\nzfs pool (both the rar files and destination are on the zfs pool).\r\ngot this while unpacking 4+GB of data.\r\n\r\n<pre>\r\n[101511.985873] BUG: unable to handle kernel NULL pointer dereference at (null)\r\n[101511.985924] IP: [<ffffffff8111eb66>] balance_pgdat+0x2c6/0x6d0\r\n[101511.985952] PGD 4008f4067 PUD 4050cb067 PMD 0\r\n[101511.985977] Oops: 0002 [#1] SMP\r\n[101511.985994] last sysfs file: /sys/devices/system/cpu/cpu5/cpufreq/stats/total_trans\r\n[101511.986015] CPU 2\r\n[101511.986547]\r\n[101511.986558] Pid: 39, comm: kswapd0 Tainted: P            2.6.38-8-server #42-Ubuntu Gigabyte Technology Co., Ltd. GA890FXA-UD5/GA-890FXA-UD5\r\n[101511.986606] RIP: 0010:[<ffffffff8111eb66>]  [<ffffffff8111eb66>] balance_pgdat+0x2c6/0x6d0\r\n[101511.986634] RSP: 0018:ffff88041b395da0  EFLAGS: 00010282\r\n[101511.986649] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000\r\n[101511.986668] RDX: 00000000002bbb93 RSI: 00000000000000d0 RDI: 000000000008d215\r\n[101511.986687] RBP: ffff88041b395e90 R08: 0000000000000000 R09: 0000000000000000\r\n[101511.986705] R10: 0000000000000064 R11: ffff8804084998f8 R12: 0000000000000000\r\n[101511.986723] R13: ffff88043fffb000 R14: 0000000000000002 R15: ffff88043fffb000\r\n[101511.986743] FS:  00007f7618e30700(0000) GS:ffff8800bfa80000(0000) knlGS:0000000000000000\r\n[101511.986763] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b\r\n[101511.986779] CR2: 0000000000000000 CR3: 0000000404e95000 CR4: 00000000000006e0\r\n[101511.986798] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\r\n[101511.986817] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400\r\n[101511.986838] Process kswapd0 (pid: 39, threadinfo ffff88041b394000, task ffff88041c83c4a0)\r\n[101511.986857] Stack:\r\n[101511.986866]  ffff88043fffbe00 ffff88041c83c4a0 0000000000000000 ffff88041b395e44\r\n[101511.986895]  ffff88041b395eac 0000000000000000 0000000100000000 00000000002bbb93\r\n[101511.986925]  0000000000000000 ffff88041b395e50 0000000000000000 0000000081087ae7\r\n[101511.986954] Call Trace:\r\n[101511.986970]  [<ffffffff8111f0b3>] kswapd+0x143/0x1b0\r\n[101511.986987]  [<ffffffff8111ef70>] ? kswapd+0x0/0x1b0\r\n[101511.987005]  [<ffffffff810871f6>] kthread+0x96/0xa0\r\n[101511.987024]  [<ffffffff8100cde4>] kernel_thread_helper+0x4/0x10\r\n[101511.987043]  [<ffffffff81087160>] ? kthread+0x0/0xa0\r\n[101511.987060]  [<ffffffff8100cde0>] ? kernel_thread_helper+0x0/0x10\r\n[101511.987304] RIP  [<ffffffff8111eb66>] balance_pgdat+0x2c6/0x6d0\r\n[101511.987325]  RSP <ffff88041b395da0>\r\n[101511.988015] CR2: 0000000000000000\r\n[101511.990748] ---[ end trace 4491dd843977a02a ]---\r\n</pre>","html_url":"https://github.com/zfsonlinux/zfs/issues/287","number":287,"title":"NULL deref in balance_pgdat()","id":1085968,"created_at":"2011-06-20T16:29:59Z"},"action":"closed"}