[Bugme-new] [Bug 9096] New: NULL pointer dereference rb_erase DWARF2 unwinder stuck... thread related?

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=9096

           Summary: NULL pointer dereference rb_erase DWARF2 unwinder
                    stuck... thread related?
           Product: Other
           Version: 2.5
     KernelVersion: 2.6.18-1.2798.fc6 #1
          Platform: All
        OS/Version: Linux
              Tree: Fedora
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Other
        AssignedTo: other_other at kernel-bugs.osdl.org
        ReportedBy: pedro at pfortuny.net


Most recent kernel where this bug did not occur: --
Distribution: Fedora-core 6
Hardware Environment: Intel Xeon Dual Core (Pentium D 925 3000MHz), Dell
PowerEdge SC440
Software Environment: samba-3.0.23, apache-2, openssh...
Problem Description: system gets suddendly blocked. Answers to pings but
nothing else (samba, ssh and apache stop answering), rebooting needed. Reading
dmesg gives an oops (attahed at bottom).

Steps to reproduce: Unable to say, system has worked OK for 3+months and this
has happened just once, yesterday. Cannot test because it is in deep
production.

relevant dmesg output:
Sep 27 10:45:00 svrdlv kernel: Unable to handle kernel NULL pointer dereference
at 0000000000000010 RIP:
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff80222a56>] rb_erase+0x14c/0x2aa
Sep 27 10:45:00 svrdlv kernel: PGD 0
Sep 27 10:45:00 svrdlv kernel: Oops: 0000 [1] SMP
Sep 27 10:45:00 svrdlv kernel: last sysfs file: /class/net/eth0/address
Sep 27 10:45:00 svrdlv kernel: CPU 0
Sep 27 10:45:00 svrdlv kernel: Modules linked in: nls_utf8 cifs autofs4 ipv6
dm_mirror dm_multipath dm_mod video sbs i2c_ec button battery asus_acpi ac
parport_pc lp parport intel_rng sg ide_cd serio_raw cdrom i2c_i801 i2c_core
shpchp tg3 pcspkr ata_piix libata sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd
uhci_hcd
Sep 27 10:45:00 svrdlv kernel: Pid: 8, comm: events/0 Tainted: G   M 
2.6.18-1.2798.fc6 #1
Sep 27 10:45:00 svrdlv kernel: RIP: 0010:[<ffffffff80222a56>] 
[<ffffffff80222a56>] rb_erase+0x14c/0x2aa
Sep 27 10:45:00 svrdlv kernel: RSP: 0018:ffff810037f49de8  EFLAGS: 00010282
Sep 27 10:45:00 svrdlv kernel: RAX: 0000000000000000 RBX: ffff810035215a48 RCX:
ffff8100384f15c8
Sep 27 10:45:00 svrdlv kernel: RDX: 0000000000000000 RSI: ffffffff806e45e0 RDI:
0000000000000000
Sep 27 10:45:00 svrdlv kernel: RBP: ffffffff806e45e0 R08: ffff810035215448 R09:
ffff81003fe2aa80
Sep 27 10:45:00 svrdlv kernel: R10: 0000000000000000 R11: 00007fff9d365bb0 R12:
ffff81003fe2aa80
Sep 27 10:45:00 svrdlv kernel: R13: 0000000000000282 R14: 0000000000000000 R15:
ffffffff803125ff
Sep 27 10:45:00 svrdlv kernel: FS:  0000000000000000(0000)
GS:ffffffff80609000(0000) knlGS:0000000000000000
Sep 27 10:45:00 svrdlv kernel: CS:  0010 DS: 0018 ES: 0018 CR0:
000000008005003b
Sep 27 10:45:00 svrdlv kernel: CR2: 0000000000000010 CR3: 0000000007083000 CR4:
00000000000006e0
Sep 27 10:45:00 svrdlv kernel: Process events/0 (pid: 8, threadinfo
ffff810037f48000, task ffff810037fef7d0)
Sep 27 10:45:00 svrdlv kernel: Stack:  ffff8100384f1980 ffff8100384f1988
ffffffff80312659 0000000000000282
Sep 27 10:45:00 svrdlv kernel:  ffffffff8056c280 ffffffff8056c288
ffffffff8024bf5f ffffffff8024884a
Sep 27 10:45:00 svrdlv kernel:  ffff81003fe2aa80 ffffffff8024884a
ffff81003fe15c80 ffff81003fe15cf0
Sep 27 10:45:00 svrdlv kernel: Call Trace:
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff80312659>] key_cleanup+0x5a/0xfb
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff8024bf5f>] run_workqueue+0x9a/0xed
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff8024893a>] worker_thread+0xf0/0x122
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff80232843>] kthread+0xf6/0x12a
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff8025cea5>] child_rip+0xa/0x11
Sep 27 10:45:00 svrdlv kernel: DWARF2 unwinder stuck at child_rip+0xa/0x11
Sep 27 10:45:00 svrdlv kernel: Leftover inexact backtrace:
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff8023274d>] kthread+0x0/0x12a
Sep 27 10:45:00 svrdlv kernel:  [<ffffffff8025ce9b>] child_rip+0x0/0x11
Sep 27 10:45:00 svrdlv kernel:
Sep 27 10:45:00 svrdlv kernel:
Sep 27 10:45:00 svrdlv kernel: Code: 48 8b 4f 10 48 85 c9 74 07 48 8b 01 a8 01
74 17 48 8b 47 08
Sep 27 10:45:00 svrdlv kernel: RIP  [<ffffffff80222a56>] rb_erase+0x14c/0x2aa
Sep 27 10:45:00 svrdlv kernel:  RSP <ffff810037f49de8>
Sep 27 10:45:00 svrdlv kernel: CR2: 0000000000000010


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