[uml-user] Backtrace for uml-18 crash

[Taras G. <ju...@uv...>]

Hello,
I've been playing with uml and I love it. Its the coolest thing. There ca=
n't=20
be anything better than running linux as an unpriviledged user among othe=
r=20
things.
With my luck uml likes to crash frequently. Here is a backtrace for one o=
f the=20
crashes.
Using uml-18, and the redhat72 image from the uml site.

I booted with
=2E/uml-18 ubd0=3Droot_fs.rh-7.2-client.pristine.20020312=20
eth0=3Dtuntap,,,192.168.0.254 debug
I it up to use my gateway, setup resolv.conf...etc

then just did lynx news.com

Hope this helps

Breakpoint 1, panic (
    fmt=3D0xa01d3480 "Kernel mode fault at addr 0x%lx, ip 0x%lx") at pani=
c.c:45
45      {
(gdb) bt
#0  panic (fmt=3D0xa01d3480 "Kernel mode fault at addr 0x%lx, ip 0x%lx")
    at panic.c:45
#1  0xa01409d2 in segv (address=3D0, ip=3D2685486889, is_write=3D0, is_us=
er=3D0)
    at trap_kern.c:98
#2  0xa01417ea in segv_handler (sig=3D11, regs=3D0xa01f4284) at trap_user=
=2Ec:403
#3  0xa01419d7 in sig_handler (sig=3D11, sc=3D{gs =3D 0, __gsh =3D 0, fs =
=3D 0,=20
      __fsh =3D 0, es =3D 43, __esh =3D 0, ds =3D 43, __dsh =3D 0, edi =3D=
 2717387432,=20
      esi =3D 2717387544, ebp =3D 2686417428, esp =3D 2686417384, ebx =3D=
 2717387328,=20
      edx =3D 3, ecx =3D 2147483392, eax =3D 2693714368, trapno =3D 13, e=
rr =3D 0,=20
      eip =3D 2685486889, cs =3D 35, __csh =3D 0, eflags =3D 66199,=20
      esp_at_signal =3D 2686417384, ss =3D 43, __ssh =3D 0, fpstate =3D 0=
x0,=20
      oldmask =3D 134217728, cr2 =3D 0}) at trap_user.c:472
#4  <signal handler called>
#5  0xa0114729 in tcp_retransmit_skb (sk=3D0xa1f80a40, skb=3D0x0)
    at tcp_output.c:820
#6  0xa0116767 in tcp_retransmit_timer (sk=3D0xa1f80a40) at tcp_timer.c:3=
77
#7  0xa0116929 in tcp_write_timer (data=3D2717387328) at tcp_timer.c:443
#8  0xa001d33a in timer_bh () at timer.c:315
#9  0xa00181d3 in bh_action (nr=3D0) at softirq.c:300
#10 0xa00180d4 in tasklet_hi_action (a=3D0xa0217aa0) at softirq.c:229
#11 0xa0017e21 in do_softirq () at softirq.c:90
#12 0xa013b026 in do_IRQ (irq=3D0, regs=3D0xa01f4284) at irq.c:334
#13 0xa013fe10 in timer_irq (regs=3D0xa01f4284) at time_kern.c:42
#14 0xa013faf2 in timer_handler (sig=3D14, regs=3D0xa01f4284) at time.c:2=
4
#15 0xa014189d in irq_handler_common (sig=3D14, sc=3D0xa01f7c00) at=20
trap_user.c:436
#16 0xa0141a92 in alarm_handler (sig=3D14, sc=3D{gs =3D 0, __gsh =3D 0, f=
s =3D 0,=20
      __fsh =3D 0, es =3D 43, __esh =3D 0, ds =3D 43, __dsh =3D 0, edi =3D=
 2686402560,=20
      esi =3D 2686402560, ebp =3D 2686418688, esp =3D 2686418644, ebx =3D=
 2686418680,=20
      edx =3D 2686402560, ecx =3D 2686418680, eax =3D 4294967292, trapno =
=3D 1,=20
      err =3D 0, eip =3D 2685806865, cs =3D 35, __csh =3D 0, eflags =3D 6=
59,=20
      esp_at_signal =3D 2686418644, ss =3D 43, __ssh =3D 0, fpstate =3D 0=
xa01f7c58,=20
      oldmask =3D 134217728, cr2 =3D 0}) at trap_user.c:497
#17 <signal handler called>
#18 0xa0162911 in __libc_nanosleep ()
#19 0xa013fdcc in idle_sleep (secs=3D10) at time.c:111
#20 0xa01438c1 in cpu_idle () at process_kern.c:407
#21 0xa000e501 in rest_init () at init/main.c:539
#22 0xa0003715 in start_kernel () at init/main.c:629
#23 0xa0141ee7 in start_kernel_proc (unused=3D0x0) at um_arch.c:120
#24 0xa0141122 in signal_tramp (arg=3D0xa0141ea8) at trap_user.c:93

--=20
The beauty of unix standards is that there are so many to choose from.