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

Mon Apr 16 18:56:50 UTC 2012

On Mon, Apr 16, 2012 at 07:58:57PM +0200, Rainer Hurling wrote:
> 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 exactly 
> one patch (file scsi_da.c from 234177 back to 233746 manually). The rest 
> is up to r234342.

I see, it is confusing but right. If you reverted only the single file,
namely scsi_da.c, then it has only single commit r234177 in the range
r233746-r234342. So it is definitely trasz' commit.

Edward ?
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