Bug 26582

Summary:	NULL pointer dereference on pipe creation
Product:	File System	Reporter:	Ferenc Wágner (wferi)
Component:	Other	Assignee:	fs_other
Status:	CLOSED UNREPRODUCIBLE
Severity:	normal	CC:	akpm, cebbert, florian, maciej.rutecki, rjw
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.37	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	21782
Attachments:	screenshot of the BUG screenshot of another BUG lspci -v output kernel config

Description Ferenc Wágner 2011-01-12 13:30:31 UTC

Pressing the hibernate key resulted in a frozen laptop (ThinkPad R50e) with the attached screenshot. It's not reproducible (although I didn't try too diligently) but it never happened with 2.6.36 (which had its own sporadic problems, though). As this seems to come from the pm-utils preparation phase, I didn't report it against the Power Management component; please reassign as appropriate.

Some textual extracts:

BUG: unable to handle kernel NULL pointer dereference at 00000004
IP: [<c10d0343>] __d_instantiate+0xd/0x49
[...]
Pid: 17629, comm: 98video-quirk-d Not tainted 2.6.37+ #5 1834S5G/1834S5G
[...]
Call Trace:
 [<c10d0ee4>] ? d_instantiate+0x25/0x36
 [<c10c9b8a>] ? create_write_pipe+0x101/0x172
 [<c10c9c1f>] ? do_pipe_flags+0x24/0xc8
 [<c10c9cd7>] ? sys_pipe2+0x14/0x53
 [<c103e271>] ? sys_rt_sigprocmask+0xa2/0xb5
 [<c10c9d2d>] ? sys_pipe+0x17/0x1a
 [<c100309f>] ? sysenter_do_call+0x12/0x28

Comment 1 Ferenc Wágner 2011-01-12 13:31:38 UTC

Created attachment 43322 [details]
screenshot of the BUG

Comment 2 Ferenc Wágner 2011-01-14 10:36:45 UTC

The bug reproduced itself (at least I guess it's the same thing), this time the computer crashed while I was simply typing. However, updatedb was running in the background, causing some IO load. The text is rather different:

BUG: unable to handle kernel paging request at ffffffd0
IP: [<c10d8c9a>] dcache_readdir+0x11a/0x1cb
[...]
Pid: 8196, comm: updatedb.mlocat Not tainted 2.6.37+ #5 1834S5G/1834S5G
[...]
Call Trace:
 [<c10ce628>] ? filldir64+0x0/0xcc
 [<c10ce8d6>] ? vfs_readdir+0x65/0x8f
 [<c10ce628>] ? filldir64+0x0/0xcc
 [<c10ce966>] ? sys_getdents64+0x66/0xa5
 [<c100309f>] ? sysenter_do_call+0x12/0x28

I'm mostly using XFS, in case that matters.

Comment 3 Ferenc Wágner 2011-01-14 10:37:56 UTC

Created attachment 43512 [details]
screenshot of another BUG

Comment 4 Ferenc Wágner 2011-01-22 22:56:53 UTC

I found out that my home filesystem is rather corrupt, even xfs_repair hangs on it. Can that possibly cause these BUGs?

Comment 5 Florian Mickler 2011-01-24 13:18:16 UTC

hmm.. data corruption... whom to cc? you might want to consider posting to lkml with a subject mentioning the data corruption...

what commits are you running?

Comment 6 Ferenc Wágner 2011-01-24 18:09:41 UTC

I'm running three commits over 3c0eee3fe6a3a1c745379547c7e7c904aa64f6d5, that is, 2.6.37. Two commits are corrections to textual typos, the third decreases the suspend and hibernation test delays to 1 second. So basically I'm running vanilla 2.6.37.

Do you mean in-memory data corruption? Do you think bug 26042 may be something similar?

I can think of two possible causes:

1. the infamous cache-consistency problems with the i915 driver on 855GM chipsets (this is what I'm running, without fully understanding the issue: https://bugs.freedesktop.org//show_bug.cgi?id=26345)

2. Something related to suspend/hibernate, with which I'm also experiencing problems recently, cf. bug 27062 (console corruption) or bug 27372 (instant resume).

Also, I've been avoiding suspend/hibernate for a couple of days now (shutting down my laptop instead), and I experienced no crashes since then. It's a short period only yet, but maybe a hint... And Rafael is on Cc already. :)

Thanks,
Feri.

Comment 7 Ferenc Wágner 2011-02-03 01:10:32 UTC

Since I gave up on suspending/hibernating (10 days ago), the issue hasn't come back. This is suggestive, although I'm not too keen on reproducing it (that would again result in unclean shutdowns and possibly further data loss).

I'll try to reproduce it with read-only filesystems, though, in conjunction with hibernating.

Comment 8 Chuck Ebbert 2011-02-25 14:59:08 UTC

We're seeing many reports of memory corruption caused by hibernation lately.

Comment 9 Rafael J. Wysocki 2011-03-01 21:12:35 UTC

Which most likely is a red herring, because the hibernate core code hasn't
changed recently _at_ _all_.

Comment 10 Rafael J. Wysocki 2011-03-01 21:16:02 UTC

Ferenc, what do you do to hibernate the system?  Do you use s2disk?

Comment 11 Ferenc Wágner 2011-03-02 01:17:24 UTC

I used (hand compiled, modern) s2disk under 2.6.36 for quite some time, but that got deactivated by the dist-upgrade to Debian squeeze. The upgrade didn't change the running kernel, but brought very unstable hibernate functionality (like frequent reboot instead of resume). So I went back to s2disk, but that didn't change anything, the problems remained. Then I dropped s2disk again, and upgraded to 2.6.37, which introduced these memory corruption problems. Since then I've been running without s2disk, ie. pm-utils on top of the in-kernel hibernation method.

Now, since the release of 2.6.38-rc6 I've been running that, went back to my normal suspend/hibernation usage, and things seem to run much better, maybe even perfect (there might have been a single freeze during pre-allocating memory for hibernation, but I didn't have time to really assess the situation as I had to switch off the machine prompty to safely get off the train...) So there's a good chance I'll declare this issue fixed in 2.6.38-rc6, if I experience no crash in the following weeks. However, my current minimal 2.6.38-rc6 config is radically different to the previous 2.6.37 distro config, which may also hide things.

Comment 12 Ferenc Wágner 2011-03-03 11:43:11 UTC

Oh well. I can't tell whether this is the result of a memory corruption or some other bug: it was triggered when I tried to list the root directory of my pendrive right after resuming from a suspend to RAM. "Of course" the pendrive was already gone by that time, because this minimal kernel does not support USB persistence across suspends, so I/O errors would have been expected (and they duly appeared when I tried to reproduce the BUG), but a BUG and a task blocked in D state looks like a, well, bug... Which I again failed to reproduce.

Mar  3 03:15:45 szonett kernel: [60321.624061] PM: Finishing wakeup.
Mar  3 03:15:45 szonett kernel: [60321.624063] Restarting tasks ... 
Mar  3 03:15:45 szonett kernel: [60321.624252] hub 1-0:1.0: over-current change on port 3
Mar  3 03:15:45 szonett kernel: [60321.632440] done.
Mar  3 03:15:45 szonett kernel: [60321.632476] video LNXVIDEO:00: Restoring backlight state
Mar  3 03:15:45 szonett kernel: [60321.728093] usb 1-4: USB disconnect, address 14
Mar  3 03:15:45 szonett kernel: [60321.728103] PM: Removing info for No Bus:ep_81
Mar  3 03:15:45 szonett kernel: [60321.728149] PM: Removing info for No Bus:ep_02
Mar  3 03:15:45 szonett kernel: [60321.728186] PM: Removing info for usb:1-4:1.0
Mar  3 03:15:45 szonett kernel: [60321.728229] PM: Removing info for No Bus:6:0:0:0
Mar  3 03:15:45 szonett kernel: [60321.728331] PM: Removing info for scsi:6:0:0:0
Mar  3 03:15:45 szonett NetworkManager[1131]: <info> (wlan): supplicant interface state:  starting -> ready
Mar  3 03:15:45 szonett NetworkManager[1131]: <info> (wlan): device state change: 2 -> 3 (reason 42)
Mar  3 03:15:45 szonett acpid: 2 total rules matched
Mar  3 03:15:45 szonett acpid: completed input layer event "button/sleep SBTN 00000080 00000000"
Mar  3 03:15:45 szonett acpid: client 1172[0:0] has disconnected
Mar  3 03:15:45 szonett acpid: received netlink event "battery PNP0C0A:00 00000081 00000001"
Mar  3 03:15:45 szonett acpid: rule from /etc/acpi/events/battery matched
Mar  3 03:15:45 szonett acpid: executing action "/etc/acpi/power.sh"
Mar  3 03:15:45 szonett kernel: [60321.728375] PM: Removing info for No Bus:6:0:0:0
Mar  3 03:15:45 szonett kernel: [60321.729659] PM: Removing info for No Bus:sdb1
Mar  3 03:15:45 szonett kernel: [60321.730088] PM: Removing info for No Bus:8:16
Mar  3 03:15:45 szonett kernel: [60321.730245] PM: Removing info for No Bus:sdb
Mar  3 03:15:45 szonett kernel: [60321.730439] PM: Removing info for No Bus:host6
Mar  3 03:15:45 szonett kernel: [60321.730548] PM: Removing info for scsi:host6
Mar  3 03:15:45 szonett kernel: [60321.731651] PM: Removing info for No Bus:ep_00
Mar  3 03:15:45 szonett kernel: [60321.731697] PM: Removing info for usb:1-4
Mar  3 03:15:45 szonett kernel: [60321.743957] ADDRCONF(NETDEV_UP): wlan: link is not ready
Mar  3 03:15:45 szonett kernel: [60321.968108] usb 1-4: new high speed USB device using ehci_hcd and address 15
Mar  3 03:15:45 szonett kernel: [60322.045780] ADDRCONF(NETDEV_UP): utp: link is not ready
Mar  3 03:15:46 szonett kernel: [60322.107332] PM: Adding info for usb:1-4
Mar  3 03:15:46 szonett kernel: [60322.108363] PM: Adding info for usb:1-4:1.0
Mar  3 03:15:46 szonett kernel: [60322.110628] scsi7 : usb-storage 1-4:1.0
Mar  3 03:15:46 szonett kernel: [60322.110678] PM: Adding info for scsi:host7
Mar  3 03:15:46 szonett kernel: [60322.110816] PM: Adding info for No Bus:host7
Mar  3 03:15:46 szonett kernel: [60322.111933] PM: Adding info for No Bus:ep_81
Mar  3 03:15:46 szonett kernel: [60322.111969] PM: Adding info for No Bus:ep_02
Mar  3 03:15:46 szonett kernel: [60322.112029] PM: Adding info for No Bus:ep_00
Mar  3 03:15:46 szonett kernel: [60322.112054] hub 3-0:1.0: over-current change on port 1
Mar  3 03:15:46 szonett kernel: [60322.216032] hub 3-0:1.0: over-current change on port 2
Mar  3 03:15:46 szonett kernel: [60323.113119] scsi 7:0:0:0: Direct-Access     Generic  USB Flash Disk   1.00 PQ: 0 ANSI: 2
Mar  3 03:15:46 szonett kernel: [60323.113182] PM: Adding info for scsi:target7:0:0
Mar  3 03:15:46 szonett kernel: [60323.113291] PM: Adding info for scsi:7:0:0:0
Mar  3 03:15:46 szonett kernel: [60323.113405] PM: Adding info for No Bus:7:0:0:0
Mar  3 03:15:46 szonett kernel: [60323.113484] PM: Adding info for No Bus:7:0:0:0
Mar  3 03:15:46 szonett kernel: [60323.117792] sd 7:0:0:0: [sdc] 3994624 512-byte logical blocks: (2.04 GB/1.90 GiB)
Mar  3 03:15:46 szonett kernel: [60323.118649] sd 7:0:0:0: [sdc] Write Protect is off
Mar  3 03:15:46 szonett kernel: [60323.118655] sd 7:0:0:0: [sdc] Mode Sense: 03 00 00 00
Mar  3 03:15:46 szonett kernel: [60323.119449] sd 7:0:0:0: [sdc] No Caching mode page present
Mar  3 03:15:46 szonett kernel: [60323.119453] sd 7:0:0:0: [sdc] Assuming drive cache: write through
Mar  3 03:15:46 szonett kernel: [60323.119510] PM: Adding info for No Bus:8:32
Mar  3 03:15:46 szonett kernel: [60323.119638] PM: Adding info for No Bus:sdc
Mar  3 03:15:46 szonett kernel: [60323.125965] sd 7:0:0:0: [sdc] No Caching mode page present
Mar  3 03:15:46 szonett kernel: [60323.125974] sd 7:0:0:0: [sdc] Assuming drive cache: write through
Mar  3 03:15:46 szonett kernel: [60323.126574]  sdc: sdc1
Mar  3 03:15:46 szonett kernel: [60323.126671] PM: Adding info for No Bus:sdc1
Mar  3 03:15:46 szonett kernel: [60323.132243] sd 7:0:0:0: [sdc] No Caching mode page present
Mar  3 03:15:46 szonett kernel: [60323.132250] sd 7:0:0:0: [sdc] Assuming drive cache: write through
Mar  3 03:15:46 szonett kernel: [60323.132256] sd 7:0:0:0: [sdc] Attached SCSI removable disk
Mar  3 03:15:46 szonett acpid: action exited with status 0
Mar  3 03:15:46 szonett acpid: 1 total rule matched
Mar  3 03:15:46 szonett acpid: completed netlink event "battery PNP0C0A:00 00000081 00000001"
Mar  3 03:15:46 szonett acpid: client connected from 1172[0:0]
Mar  3 03:15:46 szonett acpid: 1 client rule loaded
Mar  3 03:15:55 szonett kernel: [60332.217444] BUG: unable to handle kernel NULL pointer dereference at 00000010
Mar  3 03:15:55 szonett kernel: [60332.217542] IP: [<c10ae967>] __mark_inode_dirty+0xa7/0x1b0
Mar  3 03:15:55 szonett kernel: [60332.217606] *pde = 00000000 
Mar  3 03:15:55 szonett kernel: [60332.217639] Oops: 0000 [#1] 
Mar  3 03:15:55 szonett kernel: [60332.217671] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:02:02.0/rf_kill
Mar  3 03:15:55 szonett kernel: [60332.217745] 
Mar  3 03:15:55 szonett kernel: [60332.217764] Pid: 30735, comm: ls Not tainted 2.6.38-rc6+ #38 IBM 1834S5G/1834S5G
Mar  3 03:15:55 szonett kernel: [60332.217852] EIP: 0060:[<c10ae967>] EFLAGS: 00210202 CPU: 0
Mar  3 03:15:55 szonett kernel: [60332.217905] EIP is at __mark_inode_dirty+0xa7/0x1b0
Mar  3 03:15:55 szonett kernel: [60332.217950] EAX: 00000000 EBX: d0201594 ECX: 00004000 EDX: c14afd2c
Mar  3 03:15:55 szonett kernel: [60332.218006] ESI: d47b9180 EDI: 00000000 EBP: 00000000 ESP: c0bf3f38
Mar  3 03:15:55 szonett kernel: [60332.218063]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Mar  3 03:15:55 szonett kernel: [60332.218113] Process ls (pid: 30735, ti=c0bf2000 task=c05a6e60 task.ti=c0bf2000)
Mar  3 03:15:55 szonett kernel: [60332.218177] Stack:
Mar  3 03:15:55 szonett kernel: [60332.218197]  00000000 c0bf3f90 c109f390 d0201594 de94c960 d47b9180 d0201594 dc78b180
Mar  3 03:15:55 szonett kernel: [60332.218297]  4d6ef9db c10a4842 00000000 c5c13e40 c0bf3f90 d0201594 c109f6c7 c109f390
Mar  3 03:15:55 szonett kernel: [60332.218396]  d02015ac c5c13e40 00000000 00008000 00000000 c109f73e 080baf88 080baf60
Mar  3 03:15:55 szonett kernel: [60332.218497] Call Trace:
Mar  3 03:15:55 szonett kernel: [60332.218525]  [<c109f390>] ? filldir64+0x0/0xf0
Mar  3 03:15:55 szonett kernel: [60332.218568]  [<c10a4842>] ? touch_atime+0x102/0x150
Mar  3 03:15:55 szonett kernel: [60332.218614]  [<c109f6c7>] ? vfs_readdir+0x97/0xa0
Mar  3 03:15:55 szonett kernel: [60332.218658]  [<c109f390>] ? filldir64+0x0/0xf0
Mar  3 03:15:55 szonett kernel: [60332.218700]  [<c109f73e>] ? sys_getdents64+0x6e/0xd0
Mar  3 03:15:55 szonett kernel: [60332.218748]  [<c1002a30>] ? sysenter_do_call+0x12/0x26
Mar  3 03:15:55 szonett kernel: [60332.218794] Code: 83 c4 24 c3 a8 07 75 ec 8b 73 10 ba 2c fd 4a c1 8b 46 1c 8b 00 e8 ba 6f 0c 00 85 c0 0f 85 82 00 00 00 8b 83 ac 00 00 00 8b 40 38 <f6> 40 10 02 8d b0 a0 00 00 00 75 1a 8b 50 0c f6 c2 10 0f 84 b9 
Mar  3 03:15:55 szonett kernel: [60332.219223] EIP: [<c10ae967>] __mark_inode_dirty+0xa7/0x1b0 SS:ESP 0068:c0bf3f38
Mar  3 03:15:55 szonett kernel: [60332.219300] CR2: 0000000000000010
Mar  3 03:15:55 szonett kernel: [60332.233190] ---[ end trace d3e609750be29482 ]---
Mar  3 03:17:01 szonett /USR/SBIN/CRON[30751]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Mar  3 03:17:09 szonett ntpd[1292]: Deleting interface #18 wlan, fe80::213:ceff:fe70:6e59#123, interface stats: received=0, sent=0, dropped=0, active_time=600 secs
Mar  3 03:17:19 szonett kernel: [60416.216959] SysRq : Emergency Sync
Mar  3 03:17:19 szonett kernel: [60416.217529] Emergency Sync complete
Mar  3 03:17:27 szonett acpid: client 1172[0:0] has disconnected
Mar  3 03:17:39 szonett acpid: client connected from 1172[0:0]
Mar  3 03:17:39 szonett acpid: 1 client rule loaded
Mar  3 03:18:31 szonett acpid: client 1172[0:0] has disconnected
Mar  3 03:19:07 szonett kernel: [60523.737188] SysRq : Show Blocked State
Mar  3 03:19:07 szonett kernel: [60523.738817]   task                PC stack   pid father
Mar  3 03:19:07 szonett kernel: [60523.740470] bash            D 1760c067     0 30789  30788 0x00000000
Mar  3 03:19:07 szonett kernel: [60523.741176]  c66c3f4c 00200086 00000000 1760c067 cf2c34c8 0956b000 c107c385 00000000
Mar  3 03:19:07 szonett kernel: [60523.741176]  00000000 c66c3efc 00000000 c66c3f4c 00000004 c05a6120 c05a6120 d366f094
Mar  3 03:19:07 szonett kernel: [60523.741176]  d366f094 0956b000 cf621a00 d366f094 cf2c34c8 c107d184 c36395ac d366f094
Mar  3 03:19:07 szonett kernel: [60523.741176] Call Trace:
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c107c385>] ? handle_pte_fault+0x495/0x560
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c107d184>] ? handle_mm_fault+0x84/0xb0
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c101cf10>] ? do_page_fault+0x0/0x430
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c101d08d>] ? do_page_fault+0x17d/0x430
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c13de1d8>] ? __mutex_lock_killable_slowpath+0x58/0xb0
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c109f686>] ? vfs_readdir+0x56/0xa0
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c109f390>] ? filldir64+0x0/0xf0
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c109f73e>] ? sys_getdents64+0x6e/0xd0
Mar  3 03:19:07 szonett kernel: [60523.741176]  [<c1002a30>] ? sysenter_do_call+0x12/0x26
Mar  3 03:19:07 szonett kernel: [60523.741176] Sched Debug Version: v0.10, 2.6.38-rc6+ #38
Mar  3 03:19:07 szonett kernel: [60523.741176] ktime                                   : 60523763.309469
Mar  3 03:19:07 szonett kernel: [60523.741176] sched_clk                               : 202463.085204
Mar  3 03:19:07 szonett kernel: [60523.741176] cpu_clk                                 : 60523741.176770
Mar  3 03:19:07 szonett kernel: [60523.741176] jiffies                                 : 15055934
Mar  3 03:19:07 szonett kernel: [60523.741176] sched_clock_stable                      : 0
Mar  3 03:19:07 szonett kernel: [60523.741176] 
Mar  3 03:19:07 szonett kernel: [60523.741176] sysctl_sched
Mar  3 03:19:07 szonett kernel: [60523.741176]   .sysctl_sched_latency                    : 6.000000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .sysctl_sched_min_granularity            : 0.750000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .sysctl_sched_wakeup_granularity         : 1.000000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .sysctl_sched_child_runs_first           : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .sysctl_sched_features                   : 7279
Mar  3 03:19:07 szonett kernel: [60523.741176]   .sysctl_sched_tunable_scaling            : 1 (logaritmic)
Mar  3 03:19:07 szonett kernel: [60523.741176] 
Mar  3 03:19:07 szonett kernel: [60523.741176] cpu#0, 1398.763 MHz
Mar  3 03:19:07 szonett kernel: [60523.741176]   .nr_running                    : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .load                          : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .nr_switches                   : 8755477
Mar  3 03:19:07 szonett kernel: [60523.741176]   .nr_load_updates               : 1392836
Mar  3 03:19:07 szonett kernel: [60523.741176]   .nr_uninterruptible            : 1
Mar  3 03:19:07 szonett kernel: [60523.741176]   .next_balance                  : 0.000000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .curr->pid                     : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .clock                         : 60523720.507334
Mar  3 03:19:07 szonett kernel: [60523.741176]   .cpu_load[0]                   : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .cpu_load[1]                   : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .cpu_load[2]                   : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .cpu_load[3]                   : 5
Mar  3 03:19:07 szonett kernel: [60523.741176]   .cpu_load[4]                   : 13
Mar  3 03:19:07 szonett kernel: [60523.741176] 
Mar  3 03:19:07 szonett kernel: [60523.741176] cfs_rq[0]:
Mar  3 03:19:07 szonett kernel: [60523.741176]   .exec_clock                    : 0.000000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .MIN_vruntime                  : 0.000001
Mar  3 03:19:07 szonett kernel: [60523.741176]   .min_vruntime                  : 3658294.338690
Mar  3 03:19:07 szonett kernel: [60523.741176]   .max_vruntime                  : 0.000001
Mar  3 03:19:07 szonett kernel: [60523.741176]   .spread                        : 0.000000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .spread0                       : 0.000000
Mar  3 03:19:07 szonett kernel: [60523.741176]   .nr_spread_over                : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .nr_running                    : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .load                          : 0
Mar  3 03:19:07 szonett kernel: [60523.741176] 
Mar  3 03:19:07 szonett kernel: [60523.741176] rt_rq[0]:
Mar  3 03:19:07 szonett kernel: [60523.741176]   .rt_nr_running                 : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .rt_throttled                  : 0
Mar  3 03:19:07 szonett kernel: [60523.741176]   .rt_time                       : 0.011384
Mar  3 03:19:07 szonett kernel: [60523.741176]   .rt_runtime                    : 950.000000
Mar  3 03:19:07 szonett kernel: [60523.741176] 
Mar  3 03:19:07 szonett kernel: [60523.741176] runnable tasks:
Mar  3 03:19:07 szonett kernel: [60523.741176]             task   PID         tree-key  switches  prio     exec-runtime         sum-exec        sum-sleep
Mar  3 03:19:07 szonett kernel: [60523.741176] -----------------------------------------------------------------------------------------------------

Comment 13 Florian Mickler 2011-03-04 22:27:15 UTC

Do you have an monitor attached to vga (I'm thinking about https://patchwork.kernel.org/patch/601271/, but it says 965gm beeing affected.. but still, going crazy on that vga cable might be a welcomed change in your testing routine? :) ) 

Can you post lspci -v  and attach your .config?

Comment 14 Ferenc Wágner 2011-03-05 17:29:22 UTC

Created attachment 50112 [details]
lspci -v output

Comment 15 Ferenc Wágner 2011-03-05 17:30:17 UTC

Created attachment 50122 [details]
kernel config

Comment 16 Ferenc Wágner 2011-03-05 17:38:14 UTC

When the BUG fired, there was no monitor connected to the VGA output of this laptop. I seldom use an external display, so probably that kernel didn't see one in its whole life. The kernel config in attachment 50122 [details] differs slightly from the one exhibiting the bug (USB_SUSPEND was not enabled at that time), but that's probably all to it.

Comment 17 Chuck Ebbert 2011-03-07 22:00:44 UTC

(In reply to comment #9)
> Which most likely is a red herring, because the hibernate core code hasn't
> changed recently _at_ _all_.

Still, I see many reports of hibernation causing memory (and filesystem) corruption, starting around 2.6.35 or so, maybe even earlier...

https://bugzilla.redhat.com/show_bug.cgi?id=658391
https://bugzilla.redhat.com/show_bug.cgi?id=603897
https://bugzilla.redhat.com/show_bug.cgi?id=669223
https://bugzilla.redhat.com/show_bug.cgi?id=678486

Comment 18 Florian Mickler 2011-04-17 16:46:03 UTC

Ferenc, are you still seeing this in 2.6.38.y?

Comment 19 Ferenc Wágner 2011-04-18 14:32:53 UTC

Not with my current minimal monolithic 2.6.38.3. I'm switching back to the Debian sid kernel (2.6.38-3) now. The 2.6.38-2 version (also based on 2.6.38.2) failed to resume for me in short course during previous testing, but that may have been a different issue. I couldn't pursue the problem at that time, but will take a close look now.