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Toralf Förster | 3 Jun 2012 11:35
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[uml-user] linux-v3.5-rc1: start of a user mode linux produces a core file

Whenever I start an UML image, I get a core file (nevertheless the UML
starts up fine).

The gdb back trace is :

Core was generated by `/usr/local/bin/linux-v3.5-rc1 earlyprintk
ubda=/home/tfoerste/virtual/uml/gento'.
Program terminated with signal 11, Segmentation fault.
#0  0x0808e1c4 in sigsuspend (set=0x21b16f48) at kernel/signal.c:3258
3258            current->saved_sigmask = current->blocked;
(gdb) bt
#0  0x0808e1c4 in sigsuspend (set=0x21b16f48) at kernel/signal.c:3258
#1  0x08063a30 in winch_thread (arg=0x219c3c58) at
arch/um/drivers/chan_user.c:210
#2  0xb77303ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133

v3.4 works fine, output of
$> /usr/local/bin/linux-v3.5-rc1 --showconfig > uml.config
is attached.

--

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

#
# Automatically generated file; DO NOT EDIT.
# User Mode Linux/i386 3.4.0 Kernel Configuration
#
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richard -rw- weinberger | 3 Jun 2012 11:41
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Re: [uml-user] linux-v3.5-rc1: start of a user mode linux produces a core file

On Sun, Jun 3, 2012 at 11:35 AM, Toralf Förster <toralf.foerster <at> gmx.de> wrote:
> Whenever I start an UML image, I get a core file (nevertheless the UML
> starts up fine).
>
> The gdb back trace is :
>
>
> Core was generated by `/usr/local/bin/linux-v3.5-rc1 earlyprintk
> ubda=/home/tfoerste/virtual/uml/gento'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x0808e1c4 in sigsuspend (set=0x21b16f48) at kernel/signal.c:3258
> 3258            current->saved_sigmask = current->blocked;
> (gdb) bt
> #0  0x0808e1c4 in sigsuspend (set=0x21b16f48) at kernel/signal.c:3258
> #1  0x08063a30 in winch_thread (arg=0x219c3c58) at
> arch/um/drivers/chan_user.c:210
> #2  0xb77303ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:133

Al and I currently working on -rc1.
There are TTY and signal issues.

Stay tuned.

--

-- 
Thanks,
//richard

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Toralf Förster | 4 Jun 2012 15:56
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Re: linux-v3.5-rc1: start of a user mode linux produces a core file

On 06/03/2012 11:41 AM, richard -rw- weinberger wrote:
> Al and I currently working on -rc1.
> There are TTY and signal issues.
> 
> Stay tuned.
> 
Yep - there's something wired. The current git version cannot be started
in background, meaning that something like
$>./linux ... con=pts con0=fd:0,fd:1 con1=pts con12=pts ... &

creates 3 processes called "linux" - and the output doesn't continue after :

...
NET: Registered protocol family 17
Key type dns_resolver registered
initlevel:7=late, 21 registered initcalls
Initialized stdio console driver

--

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