[uml-devel] Re: Segfault 2.6.11-rc1-mm1

[uml-devel] Re: Segfault 2.6.11-rc1-mm1

[Heiko Przybyl]

Same problem here (i'm using gentoo, too), but with 2.6.11 and 2.6.12-rc3 
(both vanilla-sources from kernel.org)

gdb:

Program received signal SIGSEGV, Segmentation fault.
0x6023a788 in __libc_setup_tls () at swab.h:134
134     {
(gdb) tb
Breakpoint 1 at 0x6023a788: file swab.h, line 134.
(gdb) bt
#0  0x6023a788 in __libc_setup_tls () at swab.h:134
#1  0x00000000 in ?? ()
#2  0x00000000 in ?? ()
#3  0x00000000 in ?? ()
#4  0x00000000 in ?? ()
#5  0x00000000 in ?? ()
#6  0x00000000 in ?? ()
#7  0x20202820 in ?? ()
#8  0x00000000 in ?? ()
#9  0x00000000 in ?? ()
#10 0x20202020 in ?? ()
#11 0x00000884 in ?? ()
#12 0x00000004 in ?? ()
#13 0x00000004 in ?? ()
#14 0x00000084 in ?? ()
#15 0x00000084 in ?? ()
#16 0x00000000 in ?? ()
#17 0x00000000 in ?? ()
#18 0x00000000 in ?? ()
#19 0x00000000 in ?? ()
#20 0x00000000 in ?? ()
#21 0x00000000 in ?? ()
#22 0x00000000 in ?? ()
#23 0xbfb143a8 in ?? ()
#24 0x0002060c in ?? ()
#25 0x00000003 in ?? ()
#26 0x00000005 in ?? ()
#27 0x6023a957 in __pthread_initialize_minimal () at swab.h:134
#28 0x00000014 in ?? ()
#29 0x00000004 in ?? ()
#30 0x60254841 in uname () at swab.h:134
#31 0x6023a2f9 in __libc_start_main () at swab.h:134
#32 0x00000000 in ?? ()
#33 0x00000000 in ?? ()
#34 0x00000000 in ?? ()
#35 0x00000000 in ?? ()
#36 0x00000000 in ?? ()
#37 0x00000000 in ?? ()
---Type <return> to continue, or q <return> to quit---
#38 0x00000000 in ?? ()
#39 0x00000000 in ?? ()
#40 0x00000000 in ?? ()
#41 0x00000000 in ?? ()
#42 0x00000000 in ?? ()
#43 0x00000000 in ?? ()
#44 0x00000000 in ?? ()
#45 0x00000000 in ?? ()
#46 0x00000000 in ?? ()
#47 0x756e694c in ?? ()
#48 0x00000078 in ?? ()
#49 0x00000000 in ?? ()
#50 0x00000000 in ?? ()
#51 0x00000000 in ?? ()
#52 0x00000000 in ?? ()
#53 0x00000000 in ?? ()
#54 0x00000000 in ?? ()
#55 0x00000000 in ?? ()
#56 0x00000000 in ?? ()
#57 0x00000000 in ?? ()
#58 0x00000000 in ?? ()
#59 0x00000000 in ?? ()
#60 0x00000000 in ?? ()
#61 0x00000000 in ?? ()
#62 0x00000000 in ?? ()
#63 0x726f7400 in ?? ()
#64 0x746e656d in ?? ()
#65 0x732d6465 in ?? ()
#66 0x006c756f in ?? ()
#67 0x00000000 in ?? ()
#68 0x00000000 in ?? ()
#69 0x00000000 in ?? ()
#70 0x00000000 in ?? ()
#71 0x00000000 in ?? ()
#72 0x00000000 in ?? ()
#73 0x00000000 in ?? ()
#74 0x00000000 in ?? ()
#75 0x00000000 in ?? ()
---Type <return> to continue, or q <return> to quit---
#76 0x00000000 in ?? ()
#77 0x00000000 in ?? ()
#78 0x00000000 in ?? ()
#79 0x2e320000 in ?? ()
#80 0x32312e36 in ?? ()
#81 0x58755a2d in ?? ()
#82 0x00005a65 in ?? ()
#83 0x00000000 in ?? ()
#84 0x00000000 in ?? ()
#85 0x00000000 in ?? ()
#86 0x00000000 in ?? ()
#87 0x00000000 in ?? ()
#88 0x00000000 in ?? ()
#89 0x00000000 in ?? ()
#90 0x00000000 in ?? ()
#91 0x00000000 in ?? ()
#92 0x00000000 in ?? ()
#93 0x00000000 in ?? ()
#94 0x00000000 in ?? ()
#95 0x23000000 in ?? ()
#96 0x65572031 in ?? ()
#97 0x70412064 in ?? ()
#98 0x20362072 in ?? ()
#99 0x343a3931 in ?? ()
#100 0x31313a39 in ?? ()
#101 0x53454320 in ?? ()
#102 0x30322054 in ?? ()
#103 0x00003530 in ?? ()
#104 0x00000000 in ?? ()
#105 0x00000000 in ?? ()
#106 0x00000000 in ?? ()
#107 0x00000000 in ?? ()
#108 0x00000000 in ?? ()
#109 0x00000000 in ?? ()
#110 0x00000000 in ?? ()
#111 0x00000000 in ?? ()
#112 0x36383669 in ?? ()
#113 0x00000000 in ?? ()
---Type <return> to continue, or q <return> to quit---
#114 0x00000000 in ?? ()
#115 0x00000000 in ?? ()
#116 0x00000000 in ?? ()
#117 0x00000000 in ?? ()
#118 0x00000000 in ?? ()
#119 0x00000000 in ?? ()
#120 0x00000000 in ?? ()
#121 0x00000000 in ?? ()
#122 0x00000000 in ?? ()
#123 0x00000000 in ?? ()
#124 0x00000000 in ?? ()
#125 0x00000000 in ?? ()
#126 0x00000000 in ?? ()
#127 0x00000000 in ?? ()
#128 0x6f6e2800 in ?? ()
#129 0x0029656e in ?? ()
#130 0x00000000 in ?? ()
#131 0x00000000 in ?? ()
#132 0x00000000 in ?? ()
#133 0x00000000 in ?? ()
#134 0x00000000 in ?? ()
#135 0x00000000 in ?? ()
#136 0x00000000 in ?? ()
#137 0x00000000 in ?? ()
#138 0x00000000 in ?? ()
#139 0x00000000 in ?? ()
#140 0x00000000 in ?? ()
#141 0x00000000 in ?? ()
#142 0x00000000 in ?? ()
#143 0x00000000 in ?? ()
#144 0x00000000 in ?? ()
#145 0x00000000 in ?? ()
#146 0x00000000 in ?? ()
#147 0x00000000 in ?? ()
#148 0x00000000 in ?? ()
#149 0x00000000 in ?? ()
#150 0x00000000 in ?? ()
#151 0x00000000 in ?? ()
---Type <return> to continue, or q <return> to quit---
#152 0x00000000 in ?? ()
#153 0x00000000 in ?? ()
#154 0x00000000 in ?? ()
#155 0x00000000 in ?? ()
#156 0x00000000 in ?? ()
#157 0x00000000 in ?? ()
#158 0x00000000 in ?? ()
#159 0x00000000 in ?? ()
#160 0x00000000 in ?? ()
#161 0x00000000 in ?? ()
#162 0x00000000 in ?? ()
#163 0x00000000 in ?? ()
#164 0x00000000 in ?? ()
#165 0x00000000 in ?? ()
#166 0x00000000 in ?? ()
#167 0x00000001 in ?? ()
#168 0x00000000 in ?? ()
#169 0x00000000 in ?? ()
#170 0x60066021 in _start () at proc_fs.h:183
#171 0x60067c20 in last_ditch_exit () at main.c:79
Previous frame inner to this frame (corrupt stack?)

strace:

execve("./linux", ["./linux"], [/* 60 vars */]) = 0
uname({sys="Linux", node="tormented-soul", ...}) = 0
brk(0x612070ff)                         = 0xa0389000
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

Could be the problem the position independent code or native posix thread 
library? I've got both enabled, but i don't want to recompile my whole 
system...
It doesn't matter if I turn on the 2G/2G or not. Or doesn't uml work without 
skas, anymore?

Thx, Heiko.

> --  There are no patches that I can think of.  If it"s any help, I"m
>  running gentoo.  I"m listing the output of gcc and libc in case my
>  configuration of them might be a problem.
>  
>  gcc --version
>  gcc (GCC) 3.3.4 20040623 (Gentoo Hardened Linux 3.3.4-r1, ssp-3.3.2-2,
>  pie-8.7.6)
>  
>  
>  /lib/libc.so.6
>  Available extensions:
>   GNU libio by Per Bothner
>   crypt add-on version 2.1 by Michael Glad and others
>   Native POSIX Threads Library by Ulrich Drepper et al
>   BIND-8.2.3-T5B
>   NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
>  Thread-local storage support included.
>  
>  
>  strace ./linux
>  execve("./linux", ["./linux"], [/* 35 vars */]) = 0
>  uname({sys="Linux", node="sentient", ...}) = 0
>  brk(0)                                  = 0xa0360000
>  brk(0xa0361f2c)                         = 0xa0361f2c
>  set_thread_area({entry_number:-1 -> 6, base_addr:0xa0361ef8,
>  limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
>  limit_in_pages:1, seg_not_present:0, useable:1}) = 0
>  --- SIGSEGV (Segmentation fault) @ 0 (0) ---
>  +++ killed by SIGSEGV +++
 


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Re: [uml-devel] Re: Segfault 2.6.11-rc1-mm1

[Blaisorblade]

On Sunday 24 April 2005 19:45, Heiko Przybyl wrote:
> Same problem here (i'm using gentoo, too), but with 2.6.11 and 2.6.12-rc3
> (both vanilla-sources from kernel.org)
>
> gdb:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x6023a788 in __libc_setup_tls () at swab.h:134
> 134     {
> (gdb) tb
> Breakpoint 1 at 0x6023a788: file swab.h, line 134.
> (gdb) bt
> #0  0x6023a788 in __libc_setup_tls () at swab.h:134

> #7  0x20202820 in ?? ()
> #8  0x00000000 in ?? ()
> #9  0x00000000 in ?? ()
> #10 0x20202020 in ?? ()
> #11 0x00000884 in ?? ()
> #12 0x00000004 in ?? ()
> #13 0x00000004 in ?? ()
> #14 0x00000084 in ?? ()
> #15 0x00000084 in ?? ()

> #23 0xbfb143a8 in ?? ()
> #24 0x0002060c in ?? ()
> #25 0x00000003 in ?? ()
> #26 0x00000005 in ?? ()
> #27 0x6023a957 in __pthread_initialize_minimal () at swab.h:134
> #28 0x00000014 in ?? ()
> #29 0x00000004 in ?? ()
> #30 0x60254841 in uname () at swab.h:134
> #31 0x6023a2f9 in __libc_start_main () at swab.h:134
> ---Type <return> to continue, or q <return> to quit---
> #47 0x756e694c in ?? ()

> #63 0x726f7400 in ?? ()
> #64 0x746e656d in ?? ()
> #65 0x732d6465 in ?? ()
> #66 0x006c756f in ?? ()

> ---Type <return> to continue, or q <return> to quit---

> #79 0x2e320000 in ?? ()
> #80 0x32312e36 in ?? ()
> #81 0x58755a2d in ?? ()

> #96 0x65572031 in ?? ()
> #97 0x70412064 in ?? ()
> #98 0x20362072 in ?? ()
> #99 0x343a3931 in ?? ()
> #100 0x31313a39 in ?? ()
> #101 0x53454320 in ?? ()
> #102 0x30322054 in ?? ()
> #103 0x00003530 in ?? ()
> #112 0x36383669 in ?? ()
> #113 0x00000000 in ?? ()
> ---Type <return> to continue, or q <return> to quit---

> #128 0x6f6e2800 in ?? ()
> #129 0x0029656e in ?? ()


> #170 0x60066021 in _start () at proc_fs.h:183
> #171 0x60067c20 in last_ditch_exit () at main.c:79
> Previous frame inner to this frame (corrupt stack?)
>
> strace:
>
> execve("./linux", ["./linux"], [/* 60 vars */]) = 0
> uname({sys="Linux", node="tormented-soul", ...}) = 0
> brk(0x612070ff)                         = 0xa0389000
> --- SIGSEGV (Segmentation fault) @ 0 (0) ---
> +++ killed by SIGSEGV +++

> Could be the problem the position independent code or native posix thread
> library? I've got both enabled, but i don't want to recompile my whole
> system..
Well, I have 
> It doesn't matter if I turn on the 2G/2G or not. Or doesn't uml work
> without skas, anymore?
Well, playing with all possible settings of MODE_TT, MODE_SKAS and 
STATIC_LINKING is welcome.
> Thx, Heiko.

> > --  There are no patches that I can think of.  If it"s any help, I"m
> >  running gentoo.  I"m listing the output of gcc and libc in case my
> >  configuration of them might be a problem.
> >
> >  gcc --version
> >  gcc (GCC) 3.3.4 20040623 (Gentoo Hardened Linux 3.3.4-r1, ssp-3.3.2-2,
> >  pie-8.7.6)
Hmm, Gentoo Hardened... I'd like to cross-check this with the other report, 
but unfortunately I cannot find it. Can you forward it me, please?
> >  /lib/libc.so.6
> >  Available extensions:
> >   GNU libio by Per Bothner
> >   crypt add-on version 2.1 by Michael Glad and others
> >   Native POSIX Threads Library by Ulrich Drepper et al
> >   BIND-8.2.3-T5B
> >   NIS(YP)/NIS+ NSS modules 0.19 by Thorsten Kukuk
> >  Thread-local storage support included.
> >
> >
> >  strace ./linux
> >  execve("./linux", ["./linux"], [/* 35 vars */]) = 0
> >  uname({sys="Linux", node="sentient", ...}) = 0
> >  brk(0)                                  = 0xa0360000
> >  brk(0xa0361f2c)                         = 0xa0361f2c
> >  set_thread_area({entry_number:-1 -> 6, base_addr:0xa0361ef8,
> >  limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
> >  limit_in_pages:1, seg_not_present:0, useable:1}) = 0
> >  --- SIGSEGV (Segmentation fault) @ 0 (0) ---
> >  +++ killed by SIGSEGV +++


-- 
Paolo Giarrusso, aka Blaisorblade
Skype user "PaoloGiarrusso"
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade




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Re: [uml-devel] Re: Segfault 2.6.11-rc1-mm1

[Heiko Przybyl]

[-- Attachment #1: Type: text/plain, Size: 667 bytes --]

I managed to get it working, by applying the skas-patch to the host 
(CONFIG_MODE_TT gives the segfault, and CONFIG_STATIC_LINK with skas doesn't 
link). My system (the host) is still running in nptl-mode but the guest isn't 
(it's known to not work ;)

> You have recompiled your system or enabled those options?
> Sorry, I forgot to finish the sentence. I have NPTL on my system, so that's 
> not the culprit. The hardened toolchain may be, I'll investigate on this.
It's ok, we're all just humans, ain't we? ;)

Heiko

-- 
* misc stuff
    http://user.cs.tu-berlin.de/~zuxez/

* public gpg-key
    http://user.cs.tu-berlin.de/~zuxez/pubkey.asc


[-- Attachment #2: Type: application/pgp-signature, Size: 190 bytes --]

Re: [uml-devel] Re: Segfault 2.6.11-rc1-mm1

[Blaisorblade]

On Sunday 24 April 2005 22:04, Heiko Przybyl wrote:
> > > Could be the problem the position independent code or native posix
> > > thread library? I've got both enabled, but i don't want to recompile my
> > > whole system..
> >
> > Well, I have
>
> You have recompiled your system or enabled those options?
Sorry, I forgot to finish the sentence. I have NPTL on my system, so that's 
not the culprit. The hardened toolchain may be, I'll investigate on this.
> > > It doesn't matter if I turn on the 2G/2G or not. Or doesn't uml work
> > > without skas, anymore?
> >
> > Well, playing with all possible settings of MODE_TT, MODE_SKAS and
> > STATIC_LINKING is welcome.
>
> Ok I'll have a look at this. Currently, I'm trying an other binutils
> version, cause the old one gave me the following error, several times:
>
> /usr/lib/gcc/i686-pc-linux-gnu/3.4.3/../../../../i686-pc-linux-gnu/bin/ld:
> `__strtol_ul_max_tab' referenced in section `.text'
> of /usr/lib/libc.a(strtol_l.o): defined in discarded section
> `.gnu.linkonce.r.__strtol_ul_max_tab' of /usr/lib/libc.a(strtoul_l.o)
>
> > > Thx, Heiko.
> > >
> > > > --  There are no patches that I can think of.  If it"s any help, I"m
> > > >  running gentoo.  I"m listing the output of gcc and libc in case my
> > > >  configuration of them might be a problem.
> > > >
> > > >  gcc --version
> > > >  gcc (GCC) 3.3.4 20040623 (Gentoo Hardened Linux 3.3.4-r1,
> > > > ssp-3.3.2-2, pie-8.7.6)
> >
> > Hmm, Gentoo Hardened... I'd like to cross-check this with the other
> > report, but unfortunately I cannot find it. Can you forward it me,
> > please?
>
> This ist'n actually my system. It was some other users post, I found on the
> user mailing-list on your sourceforge project page
> (http://sourceforge.net/mailarchive/message.php?msg_id=10605445 and the
> previous posts). I'm not using the hardened toolchain at all.
Ok, you're not replying to the thread I thought.
-- 
Paolo Giarrusso, aka Blaisorblade
Skype user "PaoloGiarrusso"
Linux registered user n. 292729
http://www.user-mode-linux.org/~blaisorblade





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