Re: page fault panic in scioctl and console-kit-daemon

Kostik Belousov wrote:
> On Sun, Jan 20, 2008 at 04:42:36AM +0100, Pawel Worach wrote:
>> Hi,
>>
>> While starting console-kit-daemon (sysutils/consolekit 0.2.3) during 
>> boot or in single-user mode the system panics. If I start it post-boot 
>> it runs fine. This is on 8.0-CURRENT from about 12 hours ago, another 
>> user also reported the same on RELENG_7. Any other information I can 
>> provide ?
>>
>> Fatal trap 12: page fault while in kernel mode
>> fault virtual address	= 0x4
>> fault code		= supervisor read, page not present
>> instruction pointer	= 0x20:0xc04d2ab4
>> stack pointer	        = 0x28:0xe6499b18
>> frame pointer	        = 0x28:0xe6499b80
>> code segment		= base 0x0, limit 0xfffff, type 0x1b
>> 			= DPL 0, pres 1, def32 1, gran 1
>> processor eflags	= interrupt enabled, resume, IOPL = 0
>> current process		= 134 (console-kit-daemon)
>> Physical memory: 1014 MB
>> Dumping 43 MB: 28 12
>>
>> #8  0xc07a34a2 in trap (frame=0xe6499ad8) at 
>> /usr/src/sys/i386/i386/trap.c:489
>> #9  0xc079183b in calltrap () at /usr/src/sys/i386/i386/exception.s:146
>> #10 0xc04d2ab4 in scioctl (dev=0xc3b20d00, cmd=537163270,
>>     data=0xe6499c70 "\002", flag=1, td=0xc3d3c880)
>>     at /usr/src/sys/dev/syscons/syscons.c:1073
>> #11 0xc051ed1a in giant_ioctl (dev=0xc3b20d00, cmd=537163270,
>>     data=0xe6499c70 "\002", fflag=1, td=0xc3d3c880)
>>     at /usr/src/sys/kern/kern_conf.c:349
>> #12 0xc0598194 in cnioctl (dev=0xc3b20d00, cmd=537163270,
>>     data=0xe6499c70 "\002", flag=1, td=0xc3d3c880)
>> ---Type <return> to continue, or q <return> to quit---
>>     at /usr/src/sys/kern/tty_cons.c:521
> 
> Unless the virtual screen is opened, the screen state scr_stat structure
> is not allocated. The following patch would fix the panic, but I do not
> know how the console-kit would react to the ENXIO from the
> VT_WAITACTIVE ioctl. Please, test it.

Thanks! The patch works.

-- 
Pawel