tg3: unable to handle null pointer dereference [Re: Linux 2.6.21-rc6]

From: Nishanth Aravamudan
Date: Fri Apr 06 2007 - 17:43:37 EST

On 05.04.2007 [19:50:11 -0700], Linus Torvalds wrote:
>
> Ok,
> I don't think there really is anything very interesting here, but we're
> hopefully whittling down the list of regressions, and fixing various
> random other small issues while at it.
>
> Some smallish MIPS updates, networking (and network driver) fixes, removal
> of a long obsolete framebuffer driver, etc etc. The shortlog really tells
> the story.
>
> We should be getting close to a 2.6.21 release, so please update any
> regression reports you've done,

2.6.21-rc5 is ok. 2.6.21-rc6 results in

[ 14.241665] Unable to handle kernel NULL pointer dereference (address 0000000000000000)
[ 14.250025] swapper[1]: Oops 11003706212352 [1]
[ 14.254753] Modules linked in:
[ 14.258046]
[ 14.258047] Pid: 1, CPU 7, comm: swapper
[ 14.264962] psr : 00001210084a6010 ifs : 8000000000000610 ip : [<a000000100495371>] Not tainted
[ 14.274399] ip is at tg3_chip_reset+0xf1/0x12c0
[ 14.279124] unat: 0000000000000000 pfs : 0000000000000610 rsc : 0000000000000003
[ 14.286862] rnat: e000001005bc7d40 bsps: e000001005bc0000 pr : 68105a9195655599
[ 14.294598] ldrs: 0000000000000000 ccv : 0000000000000000 fpsr: 0009804c8a70433f
[ 14.302338] csd : 0000000000000000 ssd : 0000000000000000
[ 14.307946] b0 : a0000001004952c0 b6 : a00000010038b2e0 b7 : a000000100486580
[ 14.315688] f6 : 1003e000000054e304351 f7 : 1003e0000000000000640
[ 14.322164] f8 : 1003e000000054e2dd251 f9 : 1003e0000000000000064
[ 14.328643] f10 : 10015e7d113fff182eec0 f11 : 1003e000000000073e88a
[ 14.335116] r1 : a000000100d4be30 r2 : a000000100b68fc0 r3 : a000000100b68eb0
[ 14.342851] r8 : 0000000000000000 r9 : 0000000000000200 r10 : a00000010089d1a8
[ 14.350597] r11 : a000000100486580 r12 : e000001005bc7d70 r13 : e000001005bc0000
[ 14.358332] r14 : 0000000000000002 r15 : e000001005d08f10 r16 : e000001005d08ee0
[ 14.366072] r17 : e000001005d08748 r18 : e000001005d08758 r19 : 0000000000000000
[ 14.373815] r20 : e000001005d08748 r21 : 0000000000000000 r22 : 0000000040027401
[ 14.381557] r23 : 0000000000027401 r24 : 0000000040000000 r25 : a00000010089d2f0
[ 14.389293] r26 : a000000100b5b5c0 r27 : 0000000000000000 r28 : 0000000000000000
[ 14.397035] r29 : 0000000000000000 r30 : 0000000000000000 r31 : e000001005d08708
[ 14.404847]
[ 14.404848] Call Trace:
[ 14.409160] [<a000000100013900>] show_stack+0x80/0xa0
[ 14.409162] sp=e000001005bc7900 bsp=e000001005bc1120
[ 14.422595] [<a0000001000141f0>] show_regs+0x870/0x8a0
[ 14.422597] sp=e000001005bc7ad0 bsp=e000001005bc10c8
[ 14.436128] [<a0000001000390f0>] die+0x1b0/0x320
[ 14.436131] sp=e000001005bc7ad0 bsp=e000001005bc1080
[ 14.449182] [<a000000100730980>] ia64_do_page_fault+0xa00/0xba0
[ 14.449185] sp=e000001005bc7af0 bsp=e000001005bc1028
[ 14.463498] [<a00000010000b760>] ia64_leave_kernel+0x0/0x280
[ 14.463501] sp=e000001005bc7ba0 bsp=e000001005bc1028
[ 14.477553] [<a000000100495370>] tg3_chip_reset+0xf0/0x12c0
[ 14.477555] sp=e000001005bc7d70 bsp=e000001005bc0fa0
[ 14.491516] [<a000000100496590>] tg3_halt+0x50/0xa0
[ 14.491518] sp=e000001005bc7d80 bsp=e000001005bc0f68
[ 14.504796] [<a0000001004a86a0>] tg3_init_one+0x1c80/0x3080
[ 14.504799] sp=e000001005bc7d80 bsp=e000001005bc0eb8
[ 14.518796] [<a000000100399c70>] pci_device_probe+0x1f0/0x2c0
[ 14.518799] sp=e000001005bc7dd0 bsp=e000001005bc0e70
[ 14.532961] [<a000000100466560>] really_probe+0x100/0x3a0
[ 14.532963] sp=e000001005bc7dd0 bsp=e000001005bc0e20
[ 14.546745] [<a0000001004669c0>] driver_probe_device+0x1c0/0x1e0
[ 14.546747] sp=e000001005bc7dd0 bsp=e000001005bc0de8
[ 14.561148] [<a000000100466c80>] __driver_attach+0xc0/0x160
[ 14.561150] sp=e000001005bc7dd0 bsp=e000001005bc0db0
[ 14.575108] [<a000000100464bb0>] bus_for_each_dev+0xb0/0x120
[ 14.575111] sp=e000001005bc7dd0 bsp=e000001005bc0d78
[ 14.589157] [<a000000100466240>] driver_attach+0x40/0x60
[ 14.589160] sp=e000001005bc7df0 bsp=e000001005bc0d58
[ 14.602862] [<a000000100465330>] bus_add_driver+0xf0/0x3c0
[ 14.602864] sp=e000001005bc7df0 bsp=e000001005bc0d18
[ 14.616736] [<a000000100467180>] driver_register+0xe0/0x1a0
[ 14.616738] sp=e000001005bc7df0 bsp=e000001005bc0cf8
[ 14.630696] [<a00000010039a1a0>] __pci_register_driver+0x120/0x1a0
[ 14.630699] sp=e000001005bc7df0 bsp=e000001005bc0cc0
[ 14.645280] [<a0000001008e8270>] tg3_init+0x30/0x60
[ 14.645283] sp=e000001005bc7e00 bsp=e000001005bc0ca8
[ 14.658540] [<a0000001008a85f0>] init+0x390/0x740
[ 14.658542] sp=e000001005bc7e00 bsp=e000001005bc0c58
[ 14.671627] [<a0000001000113d0>] kernel_thread_helper+0xd0/0x100
[ 14.671629] sp=e000001005bc7e30 bsp=e000001005bc0c30
[ 14.686023] [<a000000100009140>] start_kernel_thread+0x20/0x40
[ 14.686025] sp=e000001005bc7e30 bsp=e000001005bc0c30
[ 14.700284] Kernel panic - not syncing: Attempted to kill init!

on an 8-way IA64. I'm guessing it's one of these:

> Michael Chan (5):
> [TG3]: Eliminate the unused TG3_FLAG_SPLIT_MODE flag.
> [TG3]: Exit irq handler during chip reset.
> [TG3]: Update version and reldate.

probably "Exit irq handler during chip reset"?

Thanks,
Nish

--
Nishanth Aravamudan <nacc@xxxxxxxxxx>
IBM Linux Technology Center
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