This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1745608 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/1745608 Title: [x86_64] Kernel panic when building on NFS in VM Status in linux package in Ubuntu: Incomplete Bug description: Since around begin of December (definitely before any KPTI was merged), I'm having problems building AOSP on an NFS share that is mounted in a VM with Ubuntu 16.04.3. After some minutes the system freezes completely, the SSH session becomes unresponsive and I can't open a new one. Logging in via virt-manager's UI isn't possible either. When connecting to serial port, I got the following kernel panic stack trace: [ 2531.058622] PANIC: double fault, error_code: 0x0 [ 2531.073231] Kernel panic - not syncing: Machine halted. [ 2531.074309] CPU: 2 PID: 16421 Comm: kworker/2:0H Not tainted 4.4.0-112-generic #135-Ubuntu [ 2531.076122] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-20171110_100015-anatol 04/01/2014 [ 2531.080374] Workqueue: rpciod rpc_async_schedule [sunrpc] [ 2531.081818] 0000000000000086 3c797ca978191564 ffff88013fd07e80 ffffffff813fc233 [ 2531.083022] ffffffff81cba603 ffff88013fd07f18 ffff88013fd07f08 ffffffff8118f1c7 [ 2531.084382] 0000000000000008 ffff88013fd07f18 ffff88013fd07eb0 3c797ca978191564 [ 2531.086127] Call Trace: [ 2531.086928] <#DF> [<ffffffff813fc233>] dump_stack+0x63/0x90 [ 2531.088606] [<ffffffff8118f1c7>] panic+0xd3/0x215 [ 2531.091309] [<ffffffff81060d5d>] df_debug+0x2d/0x30 [ 2531.092424] [<ffffffff8102fb8c>] do_double_fault+0x7c/0xf0 [ 2531.093294] [<ffffffff81849288>] double_fault+0x28/0x30 [ 2531.094170] [<ffffffff8172a93d>] ? __build_skb+0x9d/0xe0 [ 2531.095017] <<EOE>> <IRQ> [<ffffffff8172aad0>] __netdev_alloc_skb+0xc0/0x100 [ 2531.096281] [<ffffffff8160a225>] page_to_skb+0x65/0x340 [ 2531.097120] [<ffffffff8160c6c5>] virtnet_receive+0x2a5/0x8f0 [ 2531.098055] [<ffffffff8160c9f3>] ? virtnet_receive+0x5d3/0x8f0 [ 2531.099023] [<ffffffff8160cd2d>] virtnet_poll+0x1d/0x80 [ 2531.100100] [<ffffffff8173a14e>] net_rx_action+0x21e/0x360 [ 2531.100894] [<ffffffff8160a103>] ? skb_recv_done+0x43/0x50 [ 2531.101765] [<ffffffff81086a61>] __do_softirq+0x101/0x290 [ 2531.102619] [<ffffffff81086d63>] irq_exit+0xa3/0xb0 [ 2531.103511] [<ffffffff8184aae4>] do_IRQ+0x54/0xd0 [ 2531.104453] [<ffffffff81846426>] common_interrupt+0x1a6/0x1a6 [ 2531.105459] <EOI> [<ffffffff811ee43f>] ? new_slab+0x29f/0x490 [ 2531.106516] [<ffffffff811ee525>] ? new_slab+0x385/0x490 [ 2531.107428] [<ffffffff811ef47b>] ___slab_alloc+0x22b/0x470 [ 2531.108372] [<ffffffffc0327a74>] ? rpc_malloc+0x34/0xa0 [sunrpc] [ 2531.109389] [<ffffffffc0323721>] ? xs_sendpages+0x61/0x1d0 [sunrpc] [ 2531.110693] [<ffffffffc032c34e>] ? rpcauth_lookup_credcache+0xbe/0x2a0 [sunrpc] [ 2531.112050] [<ffffffffc0327a74>] ? rpc_malloc+0x34/0xa0 [sunrpc] [ 2531.113174] [<ffffffff811ef6e0>] __slab_alloc+0x20/0x40 [ 2531.113906] [<ffffffff811f1075>] __kmalloc+0x1d5/0x250 [ 2531.114649] [<ffffffffc0327a74>] rpc_malloc+0x34/0xa0 [sunrpc] [ 2531.115483] [<ffffffffc031cf92>] call_allocate+0xc2/0x1b0 [sunrpc] [ 2531.116353] [<ffffffffc031ced0>] ? call_reserveresult+0x120/0x120 [sunrpc] [ 2531.117298] [<ffffffffc031ced0>] ? call_reserveresult+0x120/0x120 [sunrpc] [ 2531.118236] [<ffffffffc0328551>] __rpc_execute+0x91/0x470 [sunrpc] [ 2531.119085] [<ffffffffc0328945>] rpc_async_schedule+0x15/0x20 [sunrpc] [ 2531.120327] [<ffffffff8109b815>] process_one_work+0x165/0x480 [ 2531.121364] [<ffffffff8109bb7b>] worker_thread+0x4b/0x4d0 [ 2531.122340] [<ffffffff8109bb30>] ? process_one_work+0x480/0x480 [ 2531.123696] [<ffffffff810a1eb5>] kthread+0xe5/0x100 [ 2531.124717] [<ffffffff810a1dd0>] ? kthread_create_on_node+0x1e0/0x1e0 [ 2531.126057] [<ffffffff81845b9f>] ret_from_fork+0x3f/0x70 [ 2531.127192] [<ffffffff810a1dd0>] ? kthread_create_on_node+0x1e0/0x1e0 [ 2531.129000] Kernel Offset: disabled [ 2531.160053] ---[ end Kernel panic - not syncing: Machine halted. I decided to try the HWE kernel - with the same result, but a different stack trace: [ 3643.637138] PANIC: double fault, error_code: 0x0 [ 3643.650655] Kernel panic - not syncing: Machine halted. [ 3643.651474] CPU: 0 PID: 47 Comm: kswapd0 Not tainted 4.13.0-32-generic #35~16.04.1-Ubuntu [ 3643.653108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.0-20171110_100015-anatol 04/01/2014 [ 3643.654974] Call Trace: [ 3643.655384] <#DF> [ 3643.655740] dump_stack+0x63/0x8b [ 3643.656337] panic+0xe4/0x23d [ 3643.656870] df_debug+0x2d/0x30 [ 3643.657421] do_double_fault+0x9a/0x130 [ 3643.658119] double_fault+0x22/0x30 [ 3643.658722] RIP: 0010:_raw_spin_trylock+0x9/0x30 [ 3643.659518] RSP: 0000:ffffa3ec408a3bf8 EFLAGS: 00010292 [ 3643.660404] RAX: 000000000040008c RBX: ffff8c31683d1f00 RCX: ffffa3ec408a3c50 [ 3643.661664] RDX: 0000000000000001 RSI: ffff8c31683d19b0 RDI: ffff8c3166d1e720 [ 3643.662927] RBP: ffffa3ec408a3bf8 R08: ffffa3ec408a3c50 R09: ffffa3ec408a3d50 [ 3643.664166] R10: 000000000004dde0 R11: 0000000000000040 R12: ffff8c3166cb7f58 [ 3643.665359] R13: ffffa3ec408a3c50 R14: ffff8c3166cb7f00 R15: ffff8c3166cb7f80 [ 3643.666573] </#DF> [ 3643.666948] shrink_dentry_list+0x101/0x2e0 [ 3643.667679] prune_dcache_sb+0x5a/0x80 [ 3643.668330] super_cache_scan+0x119/0x1a0 [ 3643.669025] shrink_slab.part.48+0x1fa/0x420 [ 3643.669760] shrink_slab+0x29/0x30 [ 3643.670357] shrink_node+0x108/0x310 [ 3643.670995] kswapd+0x32a/0x770 [ 3643.671547] kthread+0x109/0x140 [ 3643.672115] ? mem_cgroup_shrink_node+0x180/0x180 [ 3643.672924] ? kthread_create_on_node+0x70/0x70 [ 3643.673707] ret_from_fork+0x1f/0x30 [ 3643.674451] Kernel Offset: 0x9c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 3643.676229] ---[ end Kernel panic - not syncing: Machine halted. Please let me know if you need further information, I can reproduce this pretty reliably... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1745608/+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