[uml-user] Kernel panic: Kernel mode fault ( do_fork )

[Vincent G. <gu...@au...>]

Hi,

I've got this one now :

linux-2.4.17-um-14 during the boot sequence just after :

...
Initializing software serial port version 1
mconsole initialized on /home/vinsz/.uml/W274Qv/mconsole
UML Audio Relay: Apr 11 2002 11:28:05
VFS: Mounted root (ext2 filesystem) readonly.
Mounted devfs on /dev
INIT: version 2.78 booting
Activating swap...
Checking root file system...
Parallelizing fsck version 1.18 (11-Nov-1999)
/dev/ubd/0: clean, 5402/25688 files, 48693/102400 blocks

Breakpoint 1, panic (
    fmt=0xa0181280 "Kernel mode fault at addr 0x%lx, ip 0x%lx") at panic.c:45
45      {
(gdb) bt
#0  panic (fmt=0xa0181280 "Kernel mode fault at addr 0x%lx, ip 0x%lx")
    at panic.c:45
#1  0xa0104ddc in segv (address=56416, ip=2684415319, is_write=2, is_user=0)
    at trap_kern.c:96
#2  0xa0105b3b in segv_handler (sig=11, sc=0xa0917ca0, usermode=0)
    at trap_user.c:412
#3  0xa0105d07 in sig_handler (sig=11, sc=
      {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43, __dsh = 0, edi = 2693960032, esi = 2693960096, ebp =
2693889516, esp = 2693889396, ebx = 2693960032, edx = 0, ecx = 2725183488, eax = 56416, trapno = 14, err = 6, eip = 2684415319,
cs = 35, __csh = 0, eflags = 2163206, esp_at_signal = 2693889396, ss = 43, __ssh = 0, fpstate = 0x0, oldmask = 0, cr2 = 56416})
    at trap_user.c:478
#4  <signal handler called>
#5  do_fork (clone_flags=17, stack_start=0, regs=0x0, stack_size=0)
    at fork.c:537
#6  0xa01021f1 in sys_fork () at syscall_kern.c:36
#7  0xa0103b3f in execute_syscall (regs=
        {regs = {2684352844, 0, 0, 2684352972, 0, 2684353100, 4294967258, 43, 43, 0, 0, 2, 1074610615, 35, 2097794, 2684352816,
43}}) at syscall_kern.c:409
#8  0xa0103c5c in syscall_handler (sig=12, sc=
      {gs = 0, __gsh = 0, fs = 0, __fsh = 0, es = 43, __esh = 0, ds = 43, __dsh = 0, edi = 0, esi = 2684352972, ebp =
2684353100, esp = 2684352816, ebx = 268435---Type <return> to continue, or q <return> to quit--- 
2844, edx = 0, ecx = 0, eax = 8872, trapno = 14, err = 6, eip = 1074610615, cs = 35, __csh = 0, eflags = 2097794, esp_at_signal
= 2684352816, ss = 43, __ssh = 0, fpstate = 0xa0917f80, oldmask = 0, cr2 = 135032832}) at syscall_user.c:74
#9  <signal handler called>
#10 0x400d41b7 in ?? ()
#11 0x08064eba in ?? ()
#12 0x0806473c in ?? ()
#13 0x08061eab in ?? ()
#14 0x08061757 in ?? ()
#15 0x080639ef in ?? ()
#16 0x08061fdf in ?? ()
#17 0x08062ef1 in ?? ()
#18 0x080620d4 in ?? ()
#19 0x08061757 in ?? ()
#20 0x080630eb in ?? ()
#21 0x08061f9b in ?? ()
#22 0x08061757 in ?? ()
#23 0x080598e9 in ?? ()
#24 0x08058167 in ?? ()
#25 0x4006fa42 in ?? ()
(gdb) 
(gdb) i sym 2684415319
do_fork + 1079 in section .text
(gdb) i line *2684415319
Line 537 of "fork.c" starts at address 0xa000ed57 <do_fork+1079>
   and ends at 0xa000ed5d <do_fork+1085>.
(gdb) 


I have tried 2.4.18-um16 but I got a kernl panic too, I don't know if it is the same one though.


Thanks,


-- 
		Vincent Guffens