[pve-devel] Kernel 4.2.8-1 problems

Alexandre DERUMIER aderumier at odiso.com
Tue Mar 15 13:41:21 CET 2016 

maybe apparmor related.

do you try to mount nfs inside the CT ?

----- Mail original -----
De: "Paul Penev" <ppquant at gmail.com>
À: "pve-devel" <pve-devel at pve.proxmox.com>
Envoyé: Mardi 15 Mars 2016 10:17:28
Objet: [pve-devel] Kernel 4.2.8-1 problems

Hello, 

I'm not sure if this bug report belongs here, perhaps you can tell. 

I upgraded a few nodes from 3.4 to 4.1 and I started getting kernel 
errors like the below one 

I'm running LXC containers with bind mounts. The mounts are exported 
from a nfs server and mounted in the host. Then they're bind-mounted 
inside the LXC container (mail spools). 

The effect is that load sky-rockets over 100. When I kill the LXC 
container, the load comes back to normal level.s 

[39162.359660] ------------[ cut here ]------------ 
[39162.359675] kernel BUG at kernel/cred.c:426! 
[39162.359686] invalid opcode: 0000 [#1] SMP 
[39162.359699] Modules linked in: xt_multiport xt_nat xt_tcpudp 
iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat 
nf_conntrack veth ip_set ip6table_filter ip6_tables iptable_filter 
ip_tables softdog x_tables nfsv3 nfsd auth_rpcgss nfs_acl nfs lockd 
grace fscache sunrpc ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core 
ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi 8021q 
garp mrp bonding openvswitch libcrc32c nfnetlink_log nfnetlink zfs(PO) 
zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zavl(PO) coretemp 
kvm_intel joydev input_leds snd_pcm kvm psmouse gpio_ich snd_timer snd 
soundcore ioatdma shpchp serio_raw pcspkr 8250_fintek i7core_edac 
i2c_i801 dca lpc_ich i5500_temp edac_core mac_hid vhost_net vhost 
macvtap macvlan autofs4 btrfs xor raid6_pq raid1 hid_generic usbmouse 
usbkbd 
[39162.360001] usbhid hid uas usb_storage ahci e1000e(O) ptp libahci pps_core 
[39162.360047] CPU: 0 PID: 24302 Comm: pop3 Tainted: P O 
4.2.8-1-pve #1 
[39162.360090] Hardware name: Supermicro X8DTT-H/X8DTT-H, BIOS 2.1b 
10/28/2011 
[39162.360134] task: ffff8802f07b0000 ti: ffff880231380000 task.ti: 
ffff880231380000 
[39162.360176] RIP: 0010:[<ffffffff8109d171>] [<ffffffff8109d171>] 
commit_creds+0x201/0x240 
[39162.360227] RSP: 0018:ffff880231383688 EFLAGS: 00010202 
[39162.360252] RAX: 0000000000000000 RBX: ffff880066f7f030 RCX: ffff8806e4505c00 
[39162.360281] RDX: 0000000000000361 RSI: 0000000000000001 RDI: ffff88029b421680 
[39162.360309] RBP: ffff8802313836b8 R08: 0000000000019e20 R09: ffff88032f90eba0 
[39162.360338] R10: ffff8802313837f8 R11: ffff880297eba000 R12: ffff88062dc90c00 
[39162.360366] R13: ffff8802f07b0000 R14: 0000000000000002 R15: ffff8806c0d5aa80 
[39162.360395] FS: 00007f5807126700(0000) GS:ffff880333a00000(0000) 
knlGS:0000000000000000 
[39162.360439] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 
[39162.360465] CR2: 00007fd0131c7802 CR3: 0000000230917000 CR4: 00000000000026f0 
[39162.360494] Stack: 
[39162.360513] 000000000000001f 000000007325b09f ffff8802313836b8 
ffff880066f7f030 
[39162.360563] ffff88032f90eba0 ffff88029b421680 ffff8802313836e8 
ffffffff81361ff5 
[39162.360612] ffff8802f07b0068 ffff880066f7f030 ffff8806e1535000 
000000000000001f 
[39162.360661] Call Trace: 
[39162.360685] [<ffffffff81361ff5>] aa_replace_current_label+0xf5/0x150 
[39162.360715] [<ffffffff81375a4a>] aa_sk_perm.isra.4+0xaa/0x140 
[39162.360741] [<ffffffff813761ce>] aa_sock_msg_perm+0x5e/0x150 
[39162.360769] [<ffffffff8136ad51>] apparmor_socket_sendmsg+0x21/0x30 
[39162.360798] [<ffffffff8132baf3>] security_socket_sendmsg+0x43/0x60 
[39162.360827] [<ffffffff816cdfba>] sock_sendmsg+0x1a/0x50 
[39162.360854] [<ffffffff816ce10b>] kernel_sendmsg+0x2b/0x30 
[39162.360891] [<ffffffffc0529368>] xs_send_kvec+0xa8/0xb0 [sunrpc] 
[39162.360923] [<ffffffffc05293ea>] xs_sendpages+0x7a/0x1d0 [sunrpc] 
[39162.360959] [<ffffffffc053c240>] ? xdr_reserve_space+0x20/0x160 [sunrpc] 
[39162.360992] [<ffffffffc052b1ac>] xs_tcp_send_request+0x8c/0x1f0 [sunrpc] 
[39162.361026] [<ffffffffc0527756>] xprt_transmit+0x66/0x330 [sunrpc] 
[39162.361057] [<ffffffffc0523e19>] call_transmit+0x1b9/0x2a0 [sunrpc] 
[39162.361088] [<ffffffffc0523c60>] ? call_decode+0x850/0x850 [sunrpc] 
[39162.361119] [<ffffffffc0523c60>] ? call_decode+0x850/0x850 [sunrpc] 
[39162.361152] [<ffffffffc052e4f1>] __rpc_execute+0x91/0x440 [sunrpc] 
[39162.361185] [<ffffffffc053167e>] rpc_execute+0x5e/0xa0 [sunrpc] 
[39162.361216] [<ffffffffc0525280>] rpc_run_task+0x70/0x90 [sunrpc] 
[39162.361248] [<ffffffffc05252f0>] rpc_call_sync+0x50/0xd0 [sunrpc] 
[39162.361277] [<ffffffffc064b5cf>] 
nfs3_rpc_wrapper.constprop.12+0x5f/0xd0 [nfsv3] 
[39162.361321] [<ffffffffc064b9c4>] nfs3_proc_access+0xc4/0x190 [nfsv3] 
[39162.361355] [<ffffffffc05b0852>] nfs_do_access+0x242/0x3c0 [nfs] 
[39162.361388] [<ffffffffc0533855>] ? generic_lookup_cred+0x15/0x20 [sunrpc] 
[39162.361423] [<ffffffffc053206b>] ? rpcauth_lookupcred+0x8b/0xd0 [sunrpc] 
[39162.361455] [<ffffffffc05b0bc0>] nfs_permission+0x1c0/0x1e0 [nfs] 
[39162.361483] [<ffffffff8120a4e0>] ? walk_component+0xe0/0x480 
[39162.361510] [<ffffffff812081d7>] __inode_permission+0x77/0xc0 
[39162.361537] [<ffffffff81208238>] inode_permission+0x18/0x50 
[39162.361563] [<ffffffff8120aae5>] link_path_walk+0x265/0x550 
[39162.361590] [<ffffffff81209c20>] ? path_init+0x1f0/0x3c0 
[39162.361616] [<ffffffff8120aecc>] path_lookupat+0x7c/0x110 
[39162.361642] [<ffffffff8120d839>] filename_lookup+0xa9/0x180 
[39162.361670] [<ffffffff811de962>] ? kmem_cache_alloc_trace+0x1d2/0x200 
[39162.361698] [<ffffffff81361cc7>] ? aa_alloc_task_context+0x27/0x40 
[39162.361725] [<ffffffff811de71f>] ? kmem_cache_alloc+0x18f/0x200 
[39162.361752] [<ffffffff8120d426>] ? getname_flags+0x56/0x1f0 
[39162.361779] [<ffffffff8120d9ea>] user_path_at_empty+0x3a/0x50 
[39162.361807] [<ffffffff811fbc94>] SyS_access+0xb4/0x220 
[39162.361834] [<ffffffff8180aaf2>] entry_SYSCALL_64_fastpath+0x16/0x75 
[39162.361861] Code: ca 48 81 fa 80 50 e4 81 0f 84 78 fe ff ff 48 8b 
8a c8 00 00 00 48 39 ce 75 e4 3b 82 d4 00 00 00 0f 84 82 fe ff ff 48 
89 f2 eb d6 <0f> 0b 0f 0b e8 66 e8 fd ff 49 8b 44 24 30 48 89 c2 f7 d0 
48 c1 
[39162.362062] RIP [<ffffffff8109d171>] commit_creds+0x201/0x240 
[39162.362091] RSP <ffff880231383688> 
[39162.362406] ---[ end trace 0848da7e7fa7bb80 ]--- 

Server characteristics: 

Supermicro X8DTT-H 
Dual Xeon E5530 CPU with 24GB total ram (16 cores seen). 
Disks are 4x1TB SATA (WD1002 black) 
I had no problems with the same load on Proxmox 3.4 and openvz containers. 

If you need more information, just ask. 

Paul 
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