i386/67955: -current on T40p kernel trap 12 in boot if cdrom present

[Per olof Ljungmark]

The following reply was made to PR i386/67955; it has been noted by GNATS.

From: "Per olof Ljungmark" <peo at intersonic.se>
To: freebsd-gnats-submit at FreeBSD.org, randy at psg.com
Cc:  
Subject: Re: i386/67955: -current on T40p kernel trap 12 in boot if cdrom
 present
Date: Tue, 06 Jul 2004 15:57:09 +0200

 Have T41/2373 with exactly same behaviour
 Tested -current CVS and build on July 6th at 10:00 UTC
 Below is what my limited understanding think I should report.
 Please let me know if I should test/check something more
 
 On boot:
 
 Mounting root from ufs:/dev/ad0s1a
 Memory modified after free 0xcc1b003e00(508) val=1ff01ff @ 0xc1b03e00
 
 Fatal trap 12: page fault while in kernel mode
 fault virtual adress    = 0x1ff021f
 fault code = supervisor read, page not present
 instruction pointer = 0x8:0xc0731832
 stack pointer = 0x10:0xd50ff984
 frame pointer = 0x10:0xd50ff9a0
 code segment = base 0x0, limit 0xffff, type 0x1b
                       = DPL 0, pres 1, def32 1, gran 1
 processor eflags = interrupt enabled, resume, IOPL = 0
 current process = 59 (sh)
 kernel: type 12 trap, code = 0
 Stopped at mtrash_ctor+0x3a:    movl   0x20(%eax),%eax
 
 db trace:
 
 mtrash_ctor(c1b03e00,200,0) at mtrash_ctor+0x3a
 uma_zalloc_arg(c10446c0,0,2) at uma_zalloc_arg+0x124
 malloc(188,c081ff80,2,3,c1a92160) at malloc+0xb2
 elf32_load_file(c1a94370,d3f080f4,d50ffab0,1000) at at elf32_load_file+0x45
 exec_elf32_imgact(d50ffb94,0,0,0,0) at exec_elf32_imgact+0x4c7
 kern_execve(c1a92160,8078a04,8078804,80789e0,0) at kern_execve+0x34e
 execve(c1a92160,d50ffd14,3,0,282) at execve+0x18
 syscall(2f,2f,2f,8078a04,8078804) at syscall+0x217
 Xint0x80_syscall() at Xint0x80_syscall+0x1f
 --- syscall (59, FreBSD ELF32, execve), eip = 0x28120bb3, esp = 
 0xbfbfea0c, ebp = 0xbfbfea38
 
 dmesg at
 http://www.inter-sonic.com/tmp/dmesg-chinacat.txt