[uml-user] another attempt to get a meaningful gdb back trace

[Toralf F. <tor...@gm...>]

Does anybody can tell me if this back trace from gdb :

Program received signal SIGTERM, Terminated.
[Switching to LWP 13346]
0xb7fff424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fff424 in __kernel_vsyscall ()
#1  0x46a6059e in __GI___poll (fds=0x37c4c640, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:83
#2  0x08070e04 in write_sigio_thread (unused=0x0) at arch/um/os-Linux/sigio.c:61
#3  0x46a6b41e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133





contains any useful data to point to a crash of a UML guest
(host kernel is 3.7.10 at a stable 32bit Gentoo, UML guest kernel is 3.8.1)
like this :



 * Starting local
 [ ok ]
Kernel panic - not syncing: Kernel mode fault at addr 0x0, ip 0x0
0840af28:  [<0833eaf8>] dump_stack+0x22/0x24                                                        
0840af40:  [<0833eb74>] panic+0x7a/0x18b                                                            
0840af68:  [<0806217a>] segv+0x2aa/0x2b0                                                            
0840b018:  [<080621f3>] segv_handler+0x73/0x80                                                      
0840b040:  [<08071ab8>] sig_handler_common+0xb8/0xe0                                                
0840b2c4:  [<08071bfd>] sig_handler+0x3d/0x50                                                       
0840b2d4:  [<0807174b>] hard_handler+0x6b/0xa0                                                      
0840b2fc:  [<b7fff40c>] 0xb7fff40c                                                                  
0840b810:  [<080c8448>] generic_handle_irq+0x28/0x30                                                
0840b820:  [<0805ee55>] do_IRQ+0x25/0x40                                                            
0840b830:  [<080623c9>] winch+0x19/0x20                                                             
0840b840:  [<08071ab8>] sig_handler_common+0xb8/0xe0
0840bac4:  [<08071bfd>] sig_handler+0x3d/0x50
0840bad4:  [<0807174b>] hard_handler+0x6b/0xa0
0840bafc:  [<b7fff40c>] 0xb7fff40c


EIP: 0073:[<40009619>] CPU: 0 Not tainted ESP: 007b:bf9cc538 EFLAGS: 00010202
    Not tainted
EAX: 4003b350 EBX: 40020fc4 ECX: 00000002 EDX: 00000000
ESI: 400226a0 EDI: 00000004 EBP: 00000016 DS: 007b ES: 007b
0840aedc:  [<0807957f>] show_regs+0x10f/0x120
0840aef8:  [<0806255c>] panic_exit+0x2c/0x50
0840af08:  [<0809e238>] notifier_call_chain+0x38/0x60
0840af30:  [<0809e383>] atomic_notifier_call_chain+0x23/0x30
0840af40:  [<0833eb9c>] panic+0xa2/0x18b
0840af68:  [<0806217a>] segv+0x2aa/0x2b0
0840b018:  [<080621f3>] segv_handler+0x73/0x80
0840b040:  [<08071ab8>] sig_handler_common+0xb8/0xe0
0840b2c4:  [<08071bfd>] sig_handler+0x3d/0x50
0840b2d4:  [<0807174b>] hard_handler+0x6b/0xa0
0840b2fc:  [<b7fff40c>] 0xb7fff40c
0840b810:  [<080c8448>] generic_handle_irq+0x28/0x30
0840b820:  [<0805ee55>] do_IRQ+0x25/0x40
0840b830:  [<080623c9>] winch+0x19/0x20
0840b840:  [<08071ab8>] sig_handler_common+0xb8/0xe0
0840bac4:  [<08071bfd>] sig_handler+0x3d/0x50
0840bad4:  [<0807174b>] hard_handler+0x6b/0xa0
0840bafc:  [<b7fff40c>] 0xb7fff40c

[New LWP 13346]

Program received signal SIGTERM, Terminated.
[Switching to LWP 13346]
0xb7fff424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fff424 in __kernel_vsyscall ()
#1  0x46a6059e in __GI___poll (fds=0x37c4c640, nfds=1, timeout=-1)
    at ../sysdeps/unix/sysv/linux/poll.c:83
#2  0x08070e04 in write_sigio_thread (unused=0x0) at arch/um/os-Linux/sigio.c:61
#3  0x46a6b41e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133


-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3