** Changed in: linux (Ubuntu Hardy)
Status: In Progress => Fix Committed
** Description changed:
+ SRU justification:
+
+ Impact: Having NFS mounted filesystems with autobinding in use there seems
+ to be a good chance that cloned clients might call rpcb_getport_async()
+ and thus trigger a Bug() statement in the code.
+
+ Fix: A cherry pick from upstream to walk to the parent client to find out
+ who "owns" the port. Fix was verified to be working.
+
+ Testcase: see below
+
+ ---
+
After viewing a film on an nfs4 share for about 20 minutes:
Apr 5 22:19:46 lena kernel: [10870.179278] ------------[ cut here
]------------
Apr 5 22:19:46 lena kernel: [10870.179287] kernel BUG at
/build/buildd/linux-2.6.24/net/sunrpc/rpcb_clnt.c:322!
Apr 5 22:19:46 lena kernel: [10870.179292] invalid opcode: 0000 [#1] SMP
Apr 5 22:19:46 lena kernel: [10870.179297] Modules linked in: des_generic
cbc af_packet binfmt_misc rfcomm l2cap bluetooth ppdev autofs4 ipv6
acpi_cpufreq cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand
freq_table cpufreq_conservative sbs sbshc bay dock rpcsec_gss_krb5 auth_rpcgss
nfs lockd nfs_acl sunrpc iptable_filter ip_tables x_tables ipw2200 ieee80211
ieee80211_crypt sbp2 lp arc4 ecb blkcipher pcmcia snd_hda_intel snd_hwdep
snd_pcm_oss snd_pcm snd_page_alloc snd_mixer_oss snd_seq_dummy nvidia(P)
snd_seq_oss iwl3945 iwlwifi_mac80211 snd_seq_midi psmouse tifm_7xx1 snd_rawmidi
serio_raw snd_seq_midi_event tifm_core i2c_core yenta_socket rsrc_nonstatic
pcmcia_core cfg80211 snd_seq snd_timer snd_seq_device container snd video
output intel_agp agpgart irda ac acer_acpi led_class button pcspkr evdev
iTCO_wdt iTCO_vendor_support parport_pc parport crc_ccitt battery shpchp
pci_hotplug wmi_acer soundcore ext3 jbd mbcache sg sr_mod sd_mod cdrom ata_piix
pata_acpi ata_generic libata scsi_mod ohci
Apr 5 22:19:46 lena kernel: 394 ieee1394 ehci_hcd uhci_hcd usbcore tg3
thermal processor fan fbcon tileblit font bitblit softcursor fuse
Apr 5 22:19:46 lena kernel: [10870.179436]
Apr 5 22:19:46 lena kernel: [10870.179440] Pid: 3393, comm: mplayer Tainted:
P (2.6.24-14-generic #1)
Apr 5 22:19:46 lena kernel: [10870.179445] EIP: 0060:[<f8e7f540>] EFLAGS:
00010206 CPU: 1
Apr 5 22:19:46 lena kernel: [10870.179483] EIP is at
rpcb_getport_async+0x290/0x430 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179487] EAX: c2a97c00 EBX: c2a97c00 ECX:
c2a97c80 EDX: f8e98b40
Apr 5 22:19:46 lena kernel: [10870.179491] ESI: eb35ef00 EDI: eb35e900 EBP:
c2b47000 ESP: c298fcc8
Apr 5 22:19:46 lena kernel: [10870.179495] DS: 007b ES: 007b FS: 00d8 GS:
0033 SS: 0068
Apr 5 22:19:46 lena kernel: [10870.179500] Process mplayer (pid: 3393,
ti=c298e000 task=c29685a0 task.ti=c298e000)
Apr 5 22:19:46 lena kernel: [10870.179503] Stack: c299d448 c298fd00 00000000
c298fd00 00000000 c298fd08 c0318059 c2a97c00
Apr 5 22:19:46 lena kernel: [10870.179514] c2a97c80 00000001 f8e770a0
c2a97c80 c03180cb c2a97c00 c2b47000 c298fd80
Apr 5 22:19:46 lena kernel: [10870.179525] c2a97c80 f8e70195 f8e71cc8
c298fd14 c298fd14 00000000 00000000 c2a97c00
Apr 5 22:19:46 lena kernel: [10870.179535] Call Trace:
Apr 5 22:19:46 lena kernel: [10870.179565] [__wait_on_bit+0x59/0x70]
__wait_on_bit+0x59/0x70
Apr 5 22:19:46 lena kernel: [10870.179587] [<f8e770a0>]
rpc_wait_bit_interruptible+0x0/0x20 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179633]
[nfs:out_of_line_wait_on_bit+0x5b/0x70] out_of_line_wait_on_bit+0x5b/0x70
Apr 5 22:19:46 lena kernel: [10870.179656] [<f8e70195>] call_bind+0x45/0x80
[sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179688] [<f8e71cc8>]
call_timeout+0x18/0x120 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179739] [<f8e77542>]
__rpc_execute+0x62/0x280 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179787] [<f8e76bf4>]
rpc_set_active+0x44/0x70 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179835] [<f8e70f38>]
rpc_do_run_task+0x68/0xc0 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179888] [<f8e7100d>]
rpc_call_sync+0x1d/0x40 [sunrpc]
Apr 5 22:19:46 lena kernel: [10870.179935] [<f8f03c65>]
_nfs4_proc_getattr+0x55/0x60 [nfs]
Apr 5 22:19:46 lena kernel: [10870.179994] [<f8f0515b>]
nfs4_proc_getattr+0x2b/0x50 [nfs]
Apr 5 22:19:46 lena kernel: [10870.180049] [<f8ef47c2>]
__nfs_revalidate_inode+0x192/0x2d0 [nfs]
Apr 5 22:19:46 lena kernel: [10870.180111] [enqueue_entity+0x5b/0x60]
enqueue_entity+0x5b/0x60
Apr 5 22:19:46 lena kernel: [10870.180126] [enqueue_task_fair+0x27/0x30]
enqueue_task_fair+0x27/0x30
Apr 5 22:19:46 lena kernel: [10870.180135] [enqueue_task+0x12/0x30]
enqueue_task+0x12/0x30
Apr 5 22:19:46 lena kernel: [10870.180148] [nfs:__next_cpu+0x12/0x60]
__next_cpu+0x12/0x20
Apr 5 22:19:46 lena kernel: [10870.180156] [find_busiest_group+0x1c4/0x780]
find_busiest_group+0x1c4/0x780
Apr 5 22:19:46 lena kernel: [10870.180165] [balance_tasks+0x6a/0x100]
balance_tasks+0x6a/0x100
Apr 5 22:19:46 lena kernel: [10870.180199] [<f8ef5653>]
nfs_revalidate_mapping+0x43/0xb0 [nfs]
Apr 5 22:19:46 lena kernel: [10870.180247] [<f8ef31b5>]
nfs_file_read+0x85/0x120 [nfs]
Apr 5 22:19:46 lena kernel: [10870.180303] [ext3:do_sync_read+0xd5/0xba0]
do_sync_read+0xd5/0x120
Apr 5 22:19:46 lena kernel: [10870.180313] [nfs:schedule+0x20a/0x650]
schedule+0x20a/0x600
Apr 5 22:19:46 lena kernel: [10870.180341] [<c0141b70>]
autoremove_wake_function+0x0/0x40
Apr 5 22:19:46 lena kernel: [10870.180355] [do_nanosleep+0x59/0x70]
do_nanosleep+0x59/0x70
Apr 5 22:19:46 lena kernel: [10870.180367] [hrtimer_nanosleep+0x5c/0xd0]
hrtimer_nanosleep+0x5c/0xd0
Apr 5 22:19:46 lena kernel: [10870.180384] [hrtimer_wakeup+0x0/0x20]
hrtimer_wakeup+0x0/0x20
Apr 5 22:19:46 lena kernel: [10870.180397] [<c018df30>]
do_sync_read+0x0/0x120
Apr 5 22:19:46 lena kernel: [10870.180405] [vfs_read+0xb7/0x170]
vfs_read+0xb7/0x170
Apr 5 22:19:46 lena kernel: [10870.180419] [sys_read+0x41/0x70]
sys_read+0x41/0x70
Apr 5 22:19:46 lena kernel: [10870.180433] [sysenter_past_esp+0x6b/0xa9]
sysenter_past_esp+0x6b/0xa9
Apr 5 22:19:46 lena kernel: [10870.180463] =======================
Apr 5 22:19:46 lena kernel: [10870.180465] Code: ac 00 00 00 c7 44 24 08 04
4a e8 f8 c7 04 24 30 81 e8 f8 89 44 24 04 e8 2f e9 2a c7 c7 44 24 20 a0 ff ff
ff e9 0c fe ff ff 66 90 <0f> 0b eb fe 0f b7 b0 ac 00 00 00 8b 57 24 8b 4f 20 8b
5f 2c 8b
Apr 5 22:19:46 lena kernel: [10870.180521] EIP: [<f8e7f540>]
rpcb_getport_async+0x290/0x430 [sunrpc] SS:ESP 0068:c298fcc8
Apr 5 22:19:46 lena kernel: [10870.180571] ---[ end trace f4581af82034a623
]---
and the video stream stops. This bug is more-or-less reliably reproducable on
my computer.
--
kernel bug rpc nfs client
https://bugs.launchpad.net/bugs/212485
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