Hi, I am seeing the exact same thing when my ubuntu VM is trying to mount the root filesystem. Everything was OK with the 3.11.0-18 kernel :
[ 97.595333] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 [ 97.596342] IP: [<ffffffffa00e8618>] __rpc_clnt_handle_event+0x48/0xd0 [sunrpc] [ 97.596342] PGD 1d5c87067 PUD 1d416f067 PMD 0 [ 97.596342] Oops: 0000 [#1] SMP [ 97.596342] Modules linked in: nfsv4 nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc ext2 kvm_intel kvm mac_hid psmouse microcode serio_raw virtio_balloon lp parport [ 97.596342] CPU: 0 PID: 781 Comm: mount Not tainted 3.11.0-19-generic #33~precise1-Ubuntu [ 97.596342] Hardware name: Bochs OVS-ubuntu1204, BIOS Bochs 01/01/2011 [ 97.596342] task: ffff8801d5e95dc0 ti: ffff8801d52f8000 task.ti: ffff8801d52f8000 [ 97.596342] RIP: 0010:[<ffffffffa00e8618>] [<ffffffffa00e8618>] __rpc_clnt_handle_event+0x48/0xd0 [sunrpc] [ 97.596342] RSP: 0018:ffff8801d52f9c18 EFLAGS: 00010283 [ 97.596342] RAX: ffff8801d6768d80 RBX: ffff8801d5e41800 RCX: 0000000000000002 [ 97.596342] RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000 [ 97.596342] RBP: ffff8801d52f9c38 R08: ffff8801d6768e78 R09: 0000000000000000 [ 97.596342] R10: 0000000000000001 R11: 0000000000017960 R12: 0000000000000000 [ 97.596342] R13: ffff8801d3267000 R14: 0000000000000000 R15: 0000000000000000 [ 97.596342] FS: 00007f4c37235800(0000) GS:ffff8801e0e00000(0000) knlGS:0000000000000000 [ 97.596342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 97.596342] CR2: 0000000000000010 CR3: 00000001d307f000 CR4: 00000000000006f0 [ 97.596342] Stack: [ 97.596342] ffff8801d52f9c28 0000000000000000 0000000000000000 ffff8801d5e41800 [ 97.596342] ffff8801d52f9c68 ffffffffa00e914a 0000000000000000 ffff8801d3267000 [ 97.596342] 00000000ffffffff ffffffffa01ec790 ffff8801d52f9ca8 ffffffff8174d8ed [ 97.596342] Call Trace: [ 97.596342] [<ffffffffa00e914a>] rpc_pipefs_event+0x6a/0xb0 [sunrpc] [ 97.596342] [<ffffffff8174d8ed>] notifier_call_chain+0x4d/0x70 [ 97.596342] [<ffffffff8108ec18>] __blocking_notifier_call_chain+0x58/0x80 [ 97.596342] [<ffffffff8108ec56>] blocking_notifier_call_chain+0x16/0x20 [ 97.596342] [<ffffffffa0103f8c>] rpc_fill_super+0xfc/0x1b0 [sunrpc] [ 97.596342] [<ffffffff811b7110>] ? set_anon_super+0x30/0x30 [ 97.596342] [<ffffffffa0103e90>] ? rpc_kill_sb+0x110/0x110 [sunrpc] [ 97.596342] [<ffffffff811b80d5>] mount_ns+0xa5/0xe0 [ 97.596342] [<ffffffffa0102549>] rpc_mount+0x29/0x30 [sunrpc] [ 97.596342] [<ffffffff811b8d33>] mount_fs+0x43/0x1b0 [ 97.596342] [<ffffffff811d29d3>] ? find_filesystem+0x63/0x80 [ 97.596342] [<ffffffff811d3cb6>] vfs_kern_mount+0x76/0x120 [ 97.596342] [<ffffffff811d5344>] do_new_mount+0xa4/0x1f0 [ 97.596342] [<ffffffff811d69a6>] do_mount+0x1e6/0x230 [ 97.596342] [<ffffffff811d6a80>] SyS_mount+0x90/0xe0 [ 97.596342] [<ffffffff8175241d>] system_call_fastpath+0x1a/0x1f [ 97.596342] Code: 01 00 00 48 89 de 48 8b 50 20 e8 54 f5 ff ff 48 85 c0 0f 84 8c 00 00 00 48 3d 00 f0 ff ff 77 5e 48 8b 7b 58 48 89 83 b0 00 00 00 <48> 8b 47 10 48 8b 50 38 31 c0 48 85 d2 74 44 ff d2 85 c0 74 3e [ 97.596342] RIP [<ffffffffa00e8618>] __rpc_clnt_handle_event+0x48/0xd0 [sunrpc] [ 97.596342] RSP <ffff8801d52f9c18> [ 97.596342] CR2: 0000000000000010 [ 97.677800] ---[ end trace 8421fc045141f7a0 ]--- [ 98.213048] init: idmapd main process (784) terminated with status 1 [ 98.214932] init: idmapd main process ended, respawning The disk drive for /usr/global is not ready yet or not present. Continue to wait, or Press S to skip mounting or M for manual recovery -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1310350 Title: Oops __rpc_clnt_handle_event+0x48/0xd0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-saucy/+bug/1310350/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
