v3.10-rc7 oops soon after boot

[George Spelvin]

Trying to upgrade from 3.9.4 to 3.10-rc7, I encountered the following
persistent oops right around the time that init enters runlevel 2.
The exact timing fluctuates slightly; it doesn't appear to be a particular
init script triggering it.

Trying to boot single-user, it occurred immediately after printing
the password prompt.

I need this machine to be up during the day, at least, so a full bisect
would cost me a chunk of a night's sleep, which I'd prefer to avoid
if anyone has any ideas for abbreviating the process.

It's a quad-core Phenom with 8 GB of ECC RAM, which has a long history
of hardware stability.

The local patches are minor tweaks to device drivers (some linuxpps
patches I'm working on, and some timeout modifications to the r8169
driver), and were all in the previous kernel.

The following is transcribed by hand, but I double-checked the call
trace and code.


[ ok ] Cleaning up temporary files....
[info] Setting console screen modes and fonts
BUG: unable to handle kernel NULL pointer dereference at        (null)
IP: [<ffffffff813b5556>] ulog_timer+0x7/0x39
PGD 216a2b067 PUF 20d853067 PMD 0
Oops: 0000 [#1] SMP
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.10.0-rc7-00025-g94f52f4 #24
Hardware name: MICR_STAR INTERNATIONAL CO.,LTD MS-7376/MS-7376, BIOS V1.7 01/13/2009
task: ffffffff815c7400 ti: ffffffff815b6000 task.ti: ffffffff815b6000
RIP: 0010:[<ffffffff813b5556>]  [<ffffffff813b5556>] ulog_timer+0x7/0x39
RSP: 0018:ffff88021fc03ec0  EFLAGS: 00010206
RAX: dead000000200200 RBX: 0000000000000100 RCX: ffff8802168ff098
RDX: ffff88021fc03f00 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff815b7fd8 R08: 0000000371f3fc33 R09: ffffffff817465c0
R10: 0000000000000000 R11: 0000000000000020 R12: 0000000000000000
R13: ffffffff813b554f R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88021fc00000(0000) knlGS:00000000f779e900
CS: 0020 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000000211f93000 CR4: 00000000000007f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Stack:
 0000000000000100 ffffffff815b7fd8 ffffffff813b554f ffffffff81031f87
 ffffffff817465c0 ffff8802168ff098 ffff88021fc03f00 ffffffff810321e9
 ffff88021fc03f00 ffff88021fc03f00 0000000000000101 ffffffff815bb088
Call Trace:
 <IRQ>
 [<ffffffff813b554f>] ? ulog_send+0x76/0x76
 [<ffffffff81031f87>] ? call_timer_fn.isra.29+0x1c/0x6f
 [<ffffffff810321e9>] ? run_timer_softirq+0x19a/0x1c2
 [<ffffffff8102de41>] ? __do_softirq+0xb9/0x171
 [<ffffffff8102dfb7>] ? irq_exit+0x3a/0x7a
 [<ffffffff8101969f>] ? smp_apic_timer_interrupt+0x72/0x7e
 [<ffffffff8142ae8a>] ? apic_timer_interrupt+0x6a/0x70
 <EOI>
 [<ffffffff81007d24>] ? default_idle+0x2/0x3
 [<ffffffff81007e1c>] ? amd_e400_idle+0xa7/0xc1
 [<ffffffff8104f79e>] ? cpu_startup_entry+0x9c/0xec
 [<ffffffff8164eb91>] ? start_kernel+0x2bd/0x2c8
 [<ffffffff8164e6f7>] ? repair_env_string+0x54/0x54
Code: 80 0d 00 00 e8 47 ae f9 ff c7 03 00 00 00 00 48 c7 43 10 00 00 00 00 48 c7 43 08 00 00 00 00 5b 5d 41 5c c3 41 54 49 89 fc 55 53 <8b> 07 48 89 fb 48 c1 e0 02 49 29 c4 49 8d ac 24 88 0d 00 00 48
RIP  [<ffffffff813b5556>] ulog_timer+0x7/0x39
 RSP <ffff88021fc03ec0>
CR2: 0000000000000000
---[ end trace 0673bd6b61636416 ]---
Kernel panic - not syncing: Fatal exception in interrupt

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