While playing with different tty settings I observed today a crash.
Unfortunately I do not have any other information than the back trace :
(gdb) bt
#0 0xb77fa424 in __kernel_vsyscall ()
#1 0x4ecd7446 in kill () at ../sysdeps/unix/syscall-template.S:82
#2 0x080738c5 in uml_abort () at arch/um/os-Linux/util.c:93
#3 0x08073c05 in os_dump_core () at arch/um/os-Linux/util.c:138
#4 0x080617e7 in panic_exit (self=0x83784d8, unused1=0, unused2=0x839b5a0) at
arch/um/kernel/um_arch.c:235
#5 0x0809c06a in notifier_call_chain (nl=<optimized out>, val=0, v=0x839b5a0,
nr_to_call=-2, nr_calls=0x0) at kernel/notifier.c:93
#6 0x0809c1b3 in __atomic_notifier_call_chain (nr_calls=0x0, nr_to_call=-1,
v=0x839b5a0, val=0, nh=0x839b540) at kernel/notifier.c:182
#7 atomic_notifier_call_chain (nh=0x839b540, val=0, v=0x839b5a0) at
kernel/notifier.c:191
#8 0x082ea9ae in panic (fmt=0x8341180 "Kernel mode fault at addr 0x%lx, ip
0x%lx") at kernel/panic.c:120
#9 0x080613ac in segv (fi=<incomplete type>, ip=0, is_user=0, regs=0x83765d0)
at arch/um/kernel/trap.c:224
#10 0x080614f3 in segv_handler (sig=11, regs=0x83765d0) at
arch/um/kernel/trap.c:170
#11 0x0807294d in sig_handler_common (sig=11, mc=0x8376910) at
arch/um/os-Linux/signal.c:43
#12 0x08072ae2 in sig_handler (sig=11, mc=0x8376910) at
arch/um/os-Linux/signal.c:230
#13 0x0807261c in hard_handler (sig=<optimized out>, info=0x837687c,
p=0x83768fc) at arch/um/os-Linux/signal.c:164
#14 <signal handler called>
#15 0x00000000 in ?? ()
#16 0x080bc36f in mask_ack_irq (desc=0x8380f10) at kernel/irq/chip.c:234
#17 handle_edge_irq (irq=5, desc=0x8380f10) at kernel/irq/chip.c:487
#18 0x080b99ee in generic_handle_irq_desc (desc=0x8380f10, irq=5) at
include/linux/irqdesc.h:114
#19 generic_handle_irq (irq=5) at kernel/irq/irqdesc.c:313
#20 0x0805e055 in do_IRQ (irq=5, regs=0x83769e0) at arch/um/kernel/irq.c:294
#21 0x0805e0cb in sigio_handler (sig=29, regs=0x83769e0) at
arch/um/kernel/irq.c:53
#22 0x0807294d in sig_handler_common (sig=29, mc=0x8376d20) at
arch/um/os-Linux/signal.c:43
#23 0x08072ae2 in sig_handler (sig=29, mc=0x8376d20) at
arch/um/os-Linux/signal.c:230
#24 0x0807261c in hard_handler (sig=<optimized out>, info=0x8376c8c,
p=0x8376d0c) at arch/um/os-Linux/signal.c:164
#25 <signal handler called>
#26 0x4ed72e9f in __tcgetattr (fd=16, termios_p=0x20dccc84) at
../sysdeps/unix/sysv/linux/tcgetattr.c:80
#27 0x4ed6d285 in __isatty (fd=16) at ../sysdeps/posix/isatty.c:29
#28 0x0807256a in maybe_sigio_broken (fd=16, read=1) at
arch/um/os-Linux/sigio.c:367
#29 0x0805e252 in activate_fd (dev_id=0x20cc1800, type=0, fd=16, irq=5) at
arch/um/kernel/irq.c:144
#30 um_request_irq (irq=5, fd=16, type=0, handler=0x8067bd0
<uml_net_interrupt>, irqflags=128, devname=0x20cc1800 "eth0", dev_id=0x20cc1800)
at arch/um/kernel/irq.c:308
#31 0x08067b4f in uml_net_open (dev=0x20cc1800) at
arch/um/drivers/net_kern.c:163
#32 0x0825e754 in __dev_open (dev=0x20cc1800) at net/core/dev.c:1167
#33 0x0825ea43 in __dev_change_flags (dev=0x20cc1800, flags=4163) at
net/core/dev.c:4691
#34 0x0825ebe7 in dev_change_flags (dev=0x20cc1800, flags=4163) at
net/core/dev.c:4747
#35 0x082a8bf7 in devinet_ioctl (net=0x83c40a0, cmd=35092, arg=0xbff0c740) at
net/ipv4/devinet.c:818
#36 0x082a9734 in inet_ioctl (sock=0x208ef140, cmd=35092, arg=3220227904) at
net/ipv4/af_inet.c:884
#37 0x0824b3e6 in sock_do_ioctl (arg=3220227904, cmd=35092, sock=0x208ef140,
net=<optimized out>) at net/socket.c:973
#38 sock_ioctl (file=0x20f66500, cmd=35092, arg=3220227904) at net/socket.c:1058
#39 0x081017fc in vfs_ioctl (arg=3220227904, cmd=35092, filp=0x20f66500) at
fs/ioctl.c:43
#40 do_vfs_ioctl (filp=0x20f66500, fd=4, cmd=35092, arg=3220227904) at
fs/ioctl.c:598
#41 0x08102003 in sys_ioctl (fd=4, cmd=35092, arg=3220227904) at fs/ioctl.c:618
#42 0x08061d93 in handle_syscall (r=0x20f558d4) at
arch/um/kernel/skas/syscall.c:35
#43 0x08075eb4 in handle_trap (local_using_sysemu=2, regs=0x20f558d4, pid=8779)
at arch/um/os-Linux/skas/process.c:193
#44 userspace (regs=0x20f558d4) at arch/um/os-Linux/skas/process.c:418
#45 0x0805ec54 in fork_handler () at arch/um/kernel/process.c:178
---Type <return> to continue, or q <return> to quit---
#46 0x00000000 in ?? ()
/me wonders whether it is usefull or not.
--
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
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