Re: Kernel builds, but crashes at boot (amd64, Revision: 234306)

Rainer Hurling Mon, 16 Apr 2012 10:59:49 -0700

On 16.04.2012 19:31 (UTC+1), Konstantin Belousov wrote:

On Mon, Apr 16, 2012 at 06:15:32PM +0200, Rainer Hurling wrote:

On 16.04.2012 16:55 (UTC+1), Konstantin Belousov wrote:

On Mon, Apr 16, 2012 at 07:35:23AM -0700, matt wrote:

On 04/16/12 01:57, O. Hartmann wrote:

On 04/15/12 12:30, Conrad J. Sabatier wrote:

Today I'm suddenly unable to boot a newly built kernel without crashing
right near the end of the device probes, just before the system is
about to actually come up:


Fatal trap 18: integer divide fault while in kernel mode

Stopped at 0xffffffff803b2646 = g_label_ufs_taste_common+0x36
divl 0x50(%rcx),%eax

Backtrace lists this chain of calls:
g_label_ufs_taste_common
g_label_taste
g_new_provider_event
g_run_events
g_event_procbody
fork_exit
fork_trampoline

Whether built with clang or gcc, CUSTOM config or GENERIC, same results
on rebooting.  No idea why this suddenly started happening, haven't
changed anything at all in my setup.

My recent kernel does the same on two "FreeBSD 10.0-CURRENT #1 r234309:
Sun Apr 15 14:14:11 CEST 2012" boxes. Both boxes in common is they are
attached to a Dell UltraSharp U2711 screen which does have a built-in
USB/MMC hub. I realized that it was possible to log into my lab's box

>from remote when I'm not in the lab and that is usually coincidentally

with a switched off screen.
This morning I loged in from home, loged out and got to the office,
switched on the screen - and reboot! I wasn't able to get the system
running again, it always got stuck in a

Fatal trap 18: integer divide fault while in kernel mode

Unplugging the screen's USB hub makes the system booting again!

Following is one of the last logged messages from the kernel, I don not
know whether this is usefull looking for the problem.

Regards,
Oliver

Apr 12 15:32:33 telesto kernel: hwpmc:
SOFT/16/64/0x67<INT,USR,SYS,REA,WRI>   TSC/1/64/0x20<REA>
IAP/4/48/0x3ff<INT,USR,SYS,EDG,THR,REA,WRI,INV,QUA,PRC>
IAF/3/48/0x61<INT,REA,WRI>   UCP/8/48/0x3f8<EDG,THR,REA,WRI,INV,QUA,PRC>
UCF/1/48/0x60<REA,WRI>
Apr 12 15:32:33 telesto kernel: uhub1: 4 ports with 4 removable, self
powered
Apr 12 15:32:33 telesto kernel: uhub2: 4 ports with 4 removable, self
powered
Apr 12 15:32:33 telesto kernel: uhub3: 2 ports with 2 removable, self
powered
Apr 12 15:32:33 telesto kernel: uhub0: 2 ports with 2 removable, self
powered
Apr 12 15:32:33 telesto kernel: ugen3.2:<vendor 0x8087>   at usbus3
Apr 12 15:32:33 telesto kernel: uhub4:<vendor 0x8087 product 0x0024,
class 9/0, rev 2.00/0.00, addr 2>   on usbus3
Apr 12 15:32:33 telesto kernel: ugen0.2:<vendor 0x8087>   at usbus0
Apr 12 15:32:33 telesto kernel: uhub5:<vendor 0x8087 product 0x0024,
class 9/0, rev 2.00/0.00, addr 2>   on usbus0
Apr 12 15:32:33 telesto kernel: Root mount waiting for: usbus3 usbus0
Apr 12 15:32:33 telesto kernel: uhub5: 6 ports with 6 removable, self
powered
Apr 12 15:32:33 telesto kernel: uhub4: 8 ports with 8 removable, self
powered
Apr 12 15:32:33 telesto kernel: ugen3.3:<Cherry GmbH>   at usbus3
Apr 12 15:32:33 telesto kernel: ukbd0:<Cherry GmbH wired keyboard,
class 0/0, rev 2.00/1.11, addr 3>   on usbus3
Apr 12 15:32:33 telesto kernel: kbd2 at ukbd0
Apr 12 15:32:33 telesto kernel: uhid0:<Cherry GmbH wired keyboard,
class 0/0, rev 2.00/1.11, addr 3>   on usbus3
Apr 12 15:32:33 telesto kernel: Root mount waiting for: usbus3
Apr 12 15:32:33 telesto kernel: ugen3.4:<vendor 0x0424>   at usbus3
Apr 12 15:32:33 telesto kernel: uhub6:<vendor 0x0424 product 0x2514,
class 9/0, rev 2.00/0.00, addr 4>   on usbus3
Apr 12 15:32:33 telesto kernel: Root mount waiting for: usbus3
Apr 12 15:32:33 telesto kernel: uhub6: 3 ports with 2 removable, self
powered
Apr 12 15:32:33 telesto kernel: ugen3.5:<vendor 0x0424>   at usbus3
Apr 12 15:32:33 telesto kernel: uhub7:<vendor 0x0424 product 0x2640,
class 9/0, rev 2.00/0.00, addr 5>   on usbus3
Apr 12 15:32:33 telesto kernel: Root mount waiting for: usbus3
Apr 12 15:32:33 telesto kernel: uhub7: 3 ports with 2 removable, self
powered
Apr 12 15:32:33 telesto kernel: Root mount waiting for: usbus3
Apr 12 15:32:33 telesto kernel: ugen3.6:<Generic>   at usbus3
Apr 12 15:32:33 telesto kernel: umass0:<Generic Ultra Fast Media
Reader, class 0/0, rev 2.00/1.91, addr 6>   on usbus3
Apr 12 15:32:33 telesto kernel: Root mount waiting for: usbus3
Apr 12 15:32:33 telesto kernel: (probe0:umass-sim0:0:0:0): TEST UNIT
READY. CDB: 0 0 0 0 0 0
Apr 12 15:32:33 telesto kernel: (probe0:umass-sim0:0:0:0): CAM status:
SCSI Status Error
Apr 12 15:32:33 telesto kernel: (probe0:umass-sim0:0:0:0): SCSI status:
Check Condition
Apr 12 15:32:33 telesto kernel: (probe0:umass-sim0:0:0:0): SCSI sense:
NOT READY asc:3a,0 (Medium not present)
Apr 12 15:32:33 telesto kernel: da0 at umass-sim0 bus 0 scbus14 target 0
lun 0
Apr 12 15:32:33 telesto kernel: da0:<Generic Ultra HS-SD/MMC 1.91>
Removable Direct Access SCSI-0 device
Apr 12 15:32:33 telesto kernel: da0: 40.000MB/s transfers
Apr 12 15:32:33 telesto kernel: da0: Attempt to query device size
failed: NOT READY, Medium not present
Apr 12 15:32:33 telesto kernel: ugen3.7:<Logitech>   at usbus3
Apr 12 15:32:33 telesto kernel: ums0:<Logitech USB Laser Mouse, class
0/0, rev 2.00/56.01, addr 7>   on usbus3
Apr 12 15:32:33 telesto kernel: ums0: 8 buttons and [XYZT] coordinates
ID=0
Apr 12 15:32:33 telesto kernel: Trying to mount root from
ufs:/dev/gpt/root [rw]...
Apr 12 15:32:33 telesto kernel: nvidia0:<GeForce GTX 570>   on vgapci0
Apr 12 15:32:33 telesto kernel: vgapci0: child nvidia0 requested
pci_enable_io
Apr 12 15:32:33 telesto kernel: vgapci0: child nvidia0 requested
pci_enable_io
Apr 12 15:32:33 telesto kernel: vboxdrv: fAsync=0 offMin=0x2d8
offMax=0x603c
Apr 12 15:32:33 telesto kernel: module_register: module ng_ether already
exists!
Apr 12 15:32:33 telesto kernel: Module ng_ether failed to register: 17

Disconnect "Generic Ultra HS-SD/MMC" device which is presenting
da0...same problem here. System will boot if da0 is either not present
or has media (I think). In my case it was a different card reader that
had no cards in it, which seem to be similar to your case.

My guess is that this problem is related to recent changes in da, but I
couldn't pinpoint in the diff what's going wrong in a quick look.


So did you tried to revert r234177 and/or r233963 ?


I just updated my system to r234342, only downgraded
/usr/src/sys/cam/scsi/scsi_da.c to r233746, and now the system is
booting again. So obviously there is something wrong with the newest
patch to  scsi_da.c.

It is too broad, try to revert exactly one patch and see whether it works.

Sorry for my bad english. I wanted to say, that I only reverted exactlyone patch (file scsi_da.c from 234177 back to 233746 manually). The restis up to r234342.

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Re: Kernel builds, but crashes at boot (amd64, Revision: 234306)

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