nfs-kernel-server: kernel BUG at include/linux/module.h:386! on 2.6.26-2-amd64

Сегодня утром по невыясненным причинам упал nfsd в Lenny:

srv:~# cat /var/log/syslog
...
Mar 22 06:30:05 srv kernel: [1106281.550178] ------------[ cut here ]------------
Mar 22 06:30:05 srv kernel: [1106281.550178] kernel BUG at include/linux/module.h:386!
Mar 22 06:30:05 srv kernel: [1106281.550178] invalid opcode: 0000 [1] SMP
Mar 22 06:30:05 srv kernel: [1106281.550178] CPU 1
Mar 22 06:30:05 srv kernel: [1106281.550178] Modules linked in: snd_pcm_oss snd_mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_seq_device it87 hwmon_vid i2c_dev i2c_core nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs ipt_REJECT xt_iprange xt_tcpudp xt_state iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables ipv6 ext2 loop pcspkr snd_pcm snd_timer snd soundcore snd_page_alloc k8temp shpchp pci_hotplug wmi button evdev ext3 jbd mbcache sd_mod ide_cd_mod cdrom 8139too ahci ata_generic libata scsi_mod dock 8139cp mii ide_pci_generic forcedeth amd74xx ide_core ehci_hcd ohci_hcd thermal processor fan thermal_sys [last unloaded: scsi_wait_scan]
Mar 22 06:30:05 srv kernel: [1106281.550178] Pid: 17940, comm: nfsd Not tainted 2.6.26-2-amd64 #1
Mar 22 06:30:05 srv kernel: [1106281.550178] RIP: 0010:[<ffffffffa0259e67>]  [<ffffffffa0259e67>] :sunrpc:svc_recv+0x41d/0x70e
Mar 22 06:30:05 srv kernel: [1106281.550178] RSP: 0018:ffff8100349bbe90  EFLAGS: 00010246
Mar 22 06:30:05 srv kernel: [1106281.550178] RAX: 0000000000000000 RBX: ffffffffa0271d80 RCX: 0000000000000000
Mar 22 06:30:05 srv kernel: [1106281.550178] RDX: 0000000000001000 RSI: ffff8100349bbdb0 RDI: ffffffffa0271d80
Mar 22 06:30:05 srv kernel: [1106281.550178] RBP: ffff81000201e000 R08: ffff810021f85240 R09: 0000000000000000
Mar 22 06:30:05 srv kernel: [1106281.550178] R10: ffff81000101b8f0 R11: ffffffff803feacc R12: ffff810035559c00
Mar 22 06:30:05 srv kernel: [1106281.550178] R13: ffff8100042e6600 R14: ffff810008848b40 R15: ffff810030a76380
Mar 22 06:30:05 srv kernel: [1106281.550178] FS:  00007f65c00d66e0(0000) GS:ffff8100376189c0(0000) knlGS:0000000000000000
Mar 22 06:30:05 srv kernel: [1106281.550178] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Mar 22 06:30:05 srv kernel: [1106281.550178] CR2: 00007f4b14f27000 CR3: 000000000ee4c000 CR4: 00000000000006e0
Mar 22 06:30:05 srv kernel: [1106281.550178] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Mar 22 06:30:05 srv kernel: [1106281.550178] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Mar 22 06:30:05 srv kernel: [1106281.550178] Process nfsd (pid: 17940, threadinfo ffff8100349ba000, task ffff8100020a8c10)
Mar 22 06:30:05 srv kernel: [1106281.550178] Stack:  ffff81000ee4d018 00000000000dbba0 0000000000000000 ffff8100020a8c10
Mar 22 06:30:05 srv kernel: [1106281.550178]  ffffffff8022c108 0000000000100100 0000000000200200 ffffffff8042a284
Mar 22 06:30:05 srv kernel: [1106281.550178]  01000000ffffff66 0000000000000001 ffff81000201e000 ffffffffa029b67c
Mar 22 06:30:05 srv kernel: [1106281.550178] Call Trace:
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffff8022c108>] ? default_wake_function+0x0/0xe
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffff8042a284>] ? __down_read+0x12/0xa1
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffffa029b67c>] ? :nfsd:nfsd+0x0/0x2a4
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffffa029b767>] ? :nfsd:nfsd+0xeb/0x2a4
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffff8023008d>] ? schedule_tail+0x27/0x5c
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffff8020cf18>] ? child_rip+0xa/0x12
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffffa029b67c>] ? :nfsd:nfsd+0x0/0x2a4
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffffa029b67c>] ? :nfsd:nfsd+0x0/0x2a4
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffffa029b67c>] ? :nfsd:nfsd+0x0/0x2a4
Mar 22 06:30:05 srv kernel: [1106281.550178]  [<ffffffff8020cf0e>] ? child_rip+0x0/0x12
Mar 22 06:30:05 srv kernel: [1106281.550178]
Mar 22 06:30:05 srv kernel: [1106281.550178]
Mar 22 06:30:05 srv kernel: [1106281.550178] Code: 08 4c 89 e7 ff 50 08 48 85 c0 49 89 c5 0f 84 48 01 00 00 48 8b 00 48 8b 58 08 48 85 db 74 26 48 89 df e8 20 84 ff df 85 c0 75 04 <0f> 0b eb fe 65 8b 04 25 24 00 00 00 89 c0 48 c1 e0 07 48 ff 84
Mar 22 06:30:05 srv kernel: [1106281.550178] RIP  [<ffffffffa0259e67>] :sunrpc:svc_recv+0x41d/0x70e
Mar 22 06:30:05 srv kernel: [1106281.550178]  RSP <ffff8100349bbe90>
Mar 22 06:30:05 srv kernel: [1106281.550178] ---[ end trace 47bb10e8da28c2c1 ]---

Судя по архивам мэйл-листов наличие бага известно уже больше года, но всем как обычно похуй. После падения nfsd так и не смог придти в себя и отдавать шары клиентам, помог только ребут машины. Достаточно неожиданно после почти двух месяцев аптайма.