Hi,
I have got an error when booting uml with Linked list manipulation
debugging turned on. The crash occurs in the exact moment when the
consoles are showing up - it just blinks and crush. Here is the
backtrace:
#0 0x0000003cb8233e14 in abort () from /lib64/libc.so.6
#1 0x00000000600220b2 in os_dump_core () at arch/um/os-Linux/util.c:119
#2 0x00000000600147c1 in panic_exit (self=<value optimized out>,
unused1=<value optimized out>,
unused2=<value optimized out>) at arch/um/kernel/um_arch.c:233
#3 0x0000000060045996 in notifier_call_chain (nl=<value optimized out>, val=0,
v=0x602ffb40,
nr_to_call=-2, nr_calls=<value optimized out>) at kernel/notifier.c:93
#4 0x00000000600459e4 in __atomic_notifier_call_chain (nh=<value optimized
out>,
val=<value optimized out>, v=<value optimized out>) at kernel/notifier.c:182
#5 atomic_notifier_call_chain (nh=<value optimized out>, val=<value optimized
out>,
v=<value optimized out>) at kernel/notifier.c:191
#6 0x00000000601a56d0 in panic (fmt=0x601f3050 "Kernel mode fault at addr
0x%lx, ip 0x%lx")
at kernel/panic.c:115
#7 0x00000000600145df in segv (fi=..., ip=1611852984, is_user=0,
regs=0x6024fa10)
at arch/um/kernel/trap.c:201
#8 0x000000006001463e in segv_handler (sig=<value optimized out>, regs=<value
optimized out>)
at arch/um/kernel/trap.c:147
#9 0x00000000600211a4 in sig_handler_common (sig=11, sc=0x6024fbe8) at
arch/um/os-Linux/signal.c:49
#10 0x00000000600212ea in sig_handler (sig=<value optimized out>, sc=<value
optimized out>)
at arch/um/os-Linux/signal.c:226
#11 0x000000006002151c in handle_signal (sig=<value optimized out>,
sc=0x6024fbe8)
at arch/um/os-Linux/signal.c:158
#12 0x0000000060022e9c in hard_handler (sig=<value optimized out>)
at arch/um/os-Linux/sys-x86_64/signal.c:15
#13 <signal handler called>
#14 0x000000006012ecb8 in list_del (entry=0x807bcf00) at lib/list_debug.c:46
#15 0x0000000060016724 in free_winch (winch=0x807bcf00, free_irq_ok=0) at
arch/um/drivers/line.c:731
#16 0x0000000060016ad7 in winch_interrupt (irq=<value optimized out>,
data=0x807bcf00)
at arch/um/drivers/line.c:760
#17 0x0000000060055b45 in __free_irq (irq=10, dev_id=0x807bcf00) at
kernel/irq/manage.c:937
#18 0x0000000060055bc0 in free_irq (irq=10, dev_id=0x807bcf00) at
kernel/irq/manage.c:986
#19 0x0000000060016765 in free_winch (winch=0x807bcf00, free_irq_ok=1) at
arch/um/drivers/line.c:740
#20 0x0000000060017211 in unregister_winch (tty=0x8072a800, filp=<value
optimized out>)
at arch/um/drivers/line.c:836
#21 line_close (tty=0x8072a800, filp=<value optimized out>) at
arch/um/drivers/line.c:477
#22 0x00000000601335d9 in tty_release (inode=0x7eff4190, filp=0x7fc9abc0) at
drivers/char/tty_io.c:1580
#23 0x000000006007e6a8 in __fput (file=0x7fc9abc0) at fs/file_table.c:254
#24 0x000000006007e79c in fput (file=<value optimized out>) at
fs/file_table.c:200
#25 0x000000006007b995 in filp_close (filp=0x7fc9abc0, id=0x7fc720c0) at
fs/open.c:1124
#26 0x000000006007ba4a in sys_close (fd=3) at fs/open.c:1153
#27 0x0000000060014c7c in handle_syscall (r=0x7e1ba418) at
arch/um/kernel/skas/syscall.c:35
#28 0x0000000060023e7f in handle_trap (regs=0x7e1ba418) at
arch/um/os-Linux/skas/process.c:201
#29 userspace (regs=0x7e1ba418) at arch/um/os-Linux/skas/process.c:417
#30 0x000000006001265b in fork_handler () at arch/um/kernel/process.c:181
Apparently, the winch is not in the list when the free_winch is
invoked. Kernel version 2.6.34-rc7
Best Regards.
-Lukas.
------------------------------------------------------------------------------
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
