3.x/libc6 -- out of ideas -- launching chrome results in an immediate crash of Xvnc everytime

[Justin Piszcz]

Hi,

When I launch google-chrome (stable or unstable) Xvnc crashes repeatedly:

-rw------- 1 user users 115228672 Oct 25 01:48 core.Xvnc4.19596
-rw------- 1 user users 50475008 Oct 26 04:29 core.Xvnc4.6774
-rw------- 1 user users 44830720 Oct 26 16:23 core.Xvnc4.4718
-rw------- 1 user users 44630016 Oct 26 16:30 core.Xvnc4.6127
-rw------- 1 user users 44437504 Oct 26 16:33 core.Xvnc4.6494
-rw------- 1 user users 44441600 Oct 26 16:33 core.Xvnc4.6822
-rw------- 1 user users 44425216 Oct 26 16:34 core.Xvnc4.7215
-rw------- 1 user users 44429312 Oct 26 16:39 core.Xvnc4.14728
-rw------- 1 user users 45207552 Oct 26 16:40 core.Xvnc4.15102
-rw------- 1 user users 45457408 Oct 26 16:52 core.Xvnc4.21274
-rw------- 1 user users 42004480 Oct 26 16:53 core.Xvnc4.23068
-rw------- 1 user users 42770432 Oct 26 16:55 core.Xvnc4.23388
-rw------- 1 user users 44892160 Oct 26 16:55 core.Xvnc4.23891
-rw------- 1 user users 45404160 Oct 26 16:56 core.Xvnc4.24206
-rw------- 1 user users 43442176 Oct 26 16:58 core.Xvnc4.24596
-rw------- 1 user users 41889792 Oct 26 17:00 core.Xvnc4.25128
-rw------- 1 user users 41885696 Oct 26 17:04 core.Xvnc4.14144

Already ran memtest86+ no memory problems, all passes ran 100% OK.

--

Can anyone offer any suggestions as how to further debug this issue?
I see Debian upgraded its glibc from 2.13-10 to 2.13-21 but I'm not sure if
that had anything to do with it, I did try the PRELOAD statements in the
Debian readme but with no success.

#0 0x00000000004cbed4 in ?? ()
(gdb) bt
#0 0x00000000004cbed4 in ?? ()
#1 0x00000000004dd577 in ?? ()
#2 0x00000000005832a2 in ?? ()
#3 0x00000000005834ff in ?? ()
#4 0x0000000000426d90 in ?? ()
#5 0x000000000040be86 in ?? ()
#6 0x00007f3d4d529ead in __libc_start_main () from
/lib/x86_64-linux-gnu/libc.so.6
#7 0x0000000000409259 in ?? ()
#8 0x00007fffa5a6fde8 in ?? ()
#9 0x000000000000001c in ?? ()
#10 0x0000000000000015 in ?? ()
#11 0x00007fffa5a70cba in ?? ()
#12 0x00007fffa5a70cc0 in ?? ()
#13 0x00007fffa5a70cc3 in ?? ()
#14 0x00007fffa5a70ccc in ?? ()
#15 0x00007fffa5a70cd8 in ?? ()
#16 0x00007fffa5a70cde in ?? ()
#17 0x00007fffa5a70cf4 in ?? ()
#18 0x00007fffa5a70cfe in ?? ()
#19 0x00007fffa5a70d08 in ?? ()
#20 0x00007fffa5a70d0f in ?? ()
#21 0x00007fffa5a70d12 in ?? ()
#22 0x00007fffa5a70d1b in ?? ()
#23 0x00007fffa5a70d21 in ?? ()
#24 0x00007fffa5a70d2a in ?? ()
#25 0x00007fffa5a70d40 in ?? ()
#26 0x00007fffa5a70d49 in ?? ()
#27 0x00007fffa5a70d4e in ?? ()
#28 0x00007fffa5a70d52 in ?? ()
#29 0x00007fffa5a70d56 in ?? ()
#30 0x00007fffa5a70e66 in ?? ()
#31 0x00007fffa5a70e6a in ?? ()
#32 0x0000000000000000 in ?? ()
(gdb)

Justin.

[Justin Piszcz]

Hi,

It happens with tightvnc too, and more details at crash time:

(gdb) bt
#0 0x00007f04db334405 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f04db337680 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007f04db36adbb in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#3 0x00007f04db374606 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#4 0x00007f04db37933c in free () from /lib/x86_64-linux-gnu/libc.so.6
#5 0x0000000000548c9a in miSetShape ()
#6 0x0000000000549eef in ?? ()
#7 0x000000000054a13e in ?? ()
#8 0x000000000043c157 in Dispatch ()
#9 0x000000000042259b in main ()
(gdb)

--

Any thoughts on this??
Cannot use VNC, cannot use tightvnc :(

--

$ /usr/bin/tightvncserver :1 -geometry 1920x1200

--

***@p34:~$ *** glibc detected *** Xtightvnc: free(): invalid pointer:
0x00007f04db681e60 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x72606)[0x7f04db374606]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7f04db37933c]
Xtightvnc(miSetShape+0x2ba)[0x548c9a]
Xtightvnc[0x549eef]
Xtightvnc[0x54a13e]
Xtightvnc(Dispatch+0x167)[0x43c157]
Xtightvnc(main+0x7eb)[0x42259b]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)[0x7f04db320ead]
Xtightvnc[0x421c89]
======= Memory map: ========
00400000-00582000 r-xp 00000000 08:22 1453767
/usr/bin/Xtightvnc
00782000-00795000 rw-p 00182000 08:22 1453767
/usr/bin/Xtightvnc
00795000-007b8000 rw-p 00000000 00:00 0
01d14000-02751000 rw-p 00000000 00:00 0
[heap]
7f04d4000000-7f04d4021000 rw-p 00000000 00:00 0
7f04d4021000-7f04d8000000 ---p 00000000 00:00 0
7f04d96bf000-7f04d96d4000 r-xp 00000000 08:22 3673919
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f04d96d4000-7f04d98d4000 ---p 00015000 08:22 3673919
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f04d98d4000-7f04d98d5000 rw-p 00015000 08:22 3673919
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f04d98d5000-7f04d98e0000 r-xp 00000000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d98e0000-7f04d9adf000 ---p 0000b000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d9adf000-7f04d9ae0000 r--p 0000a000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d9ae0000-7f04d9ae1000 rw-p 0000b000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d9ae1000-7f04d9aeb000 r-xp 00000000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9aeb000-7f04d9cea000 ---p 0000a000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9cea000-7f04d9ceb000 r--p 00009000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9ceb000-7f04d9cec000 rw-p 0000a000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9cec000-7f04d9d01000 r-xp 00000000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9d01000-7f04d9f00000 ---p 00015000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9f00000-7f04d9f01000 r--p 00014000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9f01000-7f04d9f02000 rw-p 00015000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9f02000-7f04d9f04000 rw-p 00000000 00:00 0
7f04d9f04000-7f04d9f0b000 r-xp 00000000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04d9f0b000-7f04da10a000 ---p 00007000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04da10a000-7f04da10b000 r--p 00006000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04da10b000-7f04da10c000 rw-p 00007000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04da10c000-7f04da16c000 rw-s 00000000 00:04 7864330
/SYSV00000000 (deleted)
7f04da16c000-7f04db302000 rw-p 00000000 00:00 0
7f04db302000-7f04db47c000 r-xp 00000000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db47c000-7f04db67c000 ---p 0017a000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db67c000-7f04db680000 r--p 0017a000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db680000-7f04db681000 rw-p 0017e000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db681000-7f04db686000 rw-p 00000000 00:00 0
7f04db686000-7f04db68e000 r-xp 00000000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db68e000-7f04db88d000 ---p 00008000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db88d000-7f04db88e000 r--p 00007000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db88e000-7f04db88f000 rw-p 00008000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db88f000-7f04db8bd000 rw-p 00000000 00:00 0
7f04db8bd000-7f04db8e1000 r-xp 00000000 08:22 1445921
/usr/lib/libjpeg.so.62.0.0
7f04db8e1000-7f04dbae0000 ---p 00024000 08:22 1445921
/usr/lib/libjpeg.so.62.0.0
7f04dbae0000-7f04dbae1000 rw-p 00023000 08:22 1445921
/usr/lib/libjpeg.so.62.0.0
7f04dbae1000-7f04dbae3000 r-xp 00000000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbae3000-7f04dbce3000 ---p 00002000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbce3000-7f04dbce4000 r--p 00002000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbce4000-7f04dbce5000 rw-p 00003000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbce5000-7f04dbd66000 r-xp 00000000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbd66000-7f04dbf65000 ---p 00081000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbf65000-7f04dbf66000 r--p 00080000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbf66000-7f04dbf67000 rw-p 00081000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbf67000-7f04dbf7e000 r-xp 00000000 08:22 1444016
/usr/lib/libz.so.1.2.3.4
7f04dbf7e000-7f04dc17d000 ---p 00017000 08:22 1444016
/usr/lib/libz.so.1.2.3.4
7f04dc17d000-7f04dc17e000 rw-p 00016000 08:22 1444016
/usr/lib/libz.so.1.2.3.4
7f04dc17e000-7f04dc19d000 r-xp 00000000 08:22 3677025
/lib/x86_64-linux-gnu/ld-2.13.so
7f04dc25a000-7f04dc2ba000 rw-s 00000000 00:04 7929868
/SYSV00000000 (deleted)
7f04dc2ba000-7f04dc31a000 rw-s 00000000 00:04 7897099
/SYSV00000000 (deleted)
7f04dc31a000-7f04dc37a000 rw-s 00000000 00:04 7831561
/SYSV00000000 (deleted)
7f04dc37a000-7f04dc37f000 rw-p 00000000 00:00 0
7f04dc39b000-7f04dc39d000 rw-p 00000000 00:00 0
7f04dc39d000-7f04dc39e000 r--p 0001f000 08:22 3677025
/lib/x86_64-linux-gnu/ld-2.13.so
7f04dc39e000-7f04dc39f000 rw-p 00020000 08:22 3677025
/lib/x86_64-linux-gnu/ld-2.13.so
7f04dc39f000-7f04dc3a0000 rw-p 00000000 00:00 0
7fffc7cc0000-7fffc7ce1000 rw-p 00000000 00:00 0
[stack]
7fffc7df3000-7fffc7df4000 r-xp 00000000 00:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]

Justin.

[Justin Piszcz]

Hi,

I built another machine clean install and the problem is the same (If you
use google sync it syncs your extensions), I am getting closer,but
essentially its an extension in Google Chrome that causes Xvnc/vnc to crash.
I have quite a few extensions so I am trying to narrow it down now.

Justin.

-----Original Message-----
From: Justin Piszcz [mailto:***@lucidpixels.com]
Sent: Wednesday, October 26, 2011 7:31 PM
To: vnc-***@realvnc.com; linux-***@vger.kernel.org
Subject: RE: 3.x/libc6 -- out of ideas -- launching chrome results in an
immediate crash of Xvnc everytime

Hi,

It happens with tightvnc too, and more details at crash time:

(gdb) bt
#0 0x00007f04db334405 in raise () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f04db337680 in abort () from /lib/x86_64-linux-gnu/libc.so.6
#2 0x00007f04db36adbb in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#3 0x00007f04db374606 in ?? () from /lib/x86_64-linux-gnu/libc.so.6
#4 0x00007f04db37933c in free () from /lib/x86_64-linux-gnu/libc.so.6
#5 0x0000000000548c9a in miSetShape ()
#6 0x0000000000549eef in ?? ()
#7 0x000000000054a13e in ?? ()
#8 0x000000000043c157 in Dispatch ()
#9 0x000000000042259b in main ()
(gdb)

--

Any thoughts on this??
Cannot use VNC, cannot use tightvnc :(

--

$ /usr/bin/tightvncserver :1 -geometry 1920x1200

--

***@p34:~$ *** glibc detected *** Xtightvnc: free(): invalid pointer:
0x00007f04db681e60 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x72606)[0x7f04db374606]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7f04db37933c]
Xtightvnc(miSetShape+0x2ba)[0x548c9a]
Xtightvnc[0x549eef]
Xtightvnc[0x54a13e]
Xtightvnc(Dispatch+0x167)[0x43c157]
Xtightvnc(main+0x7eb)[0x42259b]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)[0x7f04db320ead]
Xtightvnc[0x421c89]
======= Memory map: ========
00400000-00582000 r-xp 00000000 08:22 1453767 /usr/bin/Xtightvnc
00782000-00795000 rw-p 00182000 08:22 1453767 /usr/bin/Xtightvnc
00795000-007b8000 rw-p 00000000 00:00 0
01d14000-02751000 rw-p 00000000 00:00 0
[heap]
7f04d4000000-7f04d4021000 rw-p 00000000 00:00 0
7f04d4021000-7f04d8000000 ---p 00000000 00:00 0
7f04d96bf000-7f04d96d4000 r-xp 00000000 08:22 3673919
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f04d96d4000-7f04d98d4000 ---p 00015000 08:22 3673919
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f04d98d4000-7f04d98d5000 rw-p 00015000 08:22 3673919
/lib/x86_64-linux-gnu/libgcc_s.so.1
7f04d98d5000-7f04d98e0000 r-xp 00000000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d98e0000-7f04d9adf000 ---p 0000b000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d9adf000-7f04d9ae0000 r--p 0000a000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d9ae0000-7f04d9ae1000 rw-p 0000b000 08:22 3676132
/lib/x86_64-linux-gnu/libnss_files-2.13.so
7f04d9ae1000-7f04d9aeb000 r-xp 00000000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9aeb000-7f04d9cea000 ---p 0000a000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9cea000-7f04d9ceb000 r--p 00009000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9ceb000-7f04d9cec000 rw-p 0000a000 08:22 3676007
/lib/x86_64-linux-gnu/libnss_nis-2.13.so
7f04d9cec000-7f04d9d01000 r-xp 00000000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9d01000-7f04d9f00000 ---p 00015000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9f00000-7f04d9f01000 r--p 00014000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9f01000-7f04d9f02000 rw-p 00015000 08:22 3676005
/lib/x86_64-linux-gnu/libnsl-2.13.so
7f04d9f02000-7f04d9f04000 rw-p 00000000 00:00 0
7f04d9f04000-7f04d9f0b000 r-xp 00000000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04d9f0b000-7f04da10a000 ---p 00007000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04da10a000-7f04da10b000 r--p 00006000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04da10b000-7f04da10c000 rw-p 00007000 08:22 3675998
/lib/x86_64-linux-gnu/libnss_compat-2.13.so
7f04da10c000-7f04da16c000 rw-s 00000000 00:04 7864330
/SYSV00000000 (deleted)
7f04da16c000-7f04db302000 rw-p 00000000 00:00 0
7f04db302000-7f04db47c000 r-xp 00000000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db47c000-7f04db67c000 ---p 0017a000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db67c000-7f04db680000 r--p 0017a000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db680000-7f04db681000 rw-p 0017e000 08:22 3675991
/lib/x86_64-linux-gnu/libc-2.13.so
7f04db681000-7f04db686000 rw-p 00000000 00:00 0
7f04db686000-7f04db68e000 r-xp 00000000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db68e000-7f04db88d000 ---p 00008000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db88d000-7f04db88e000 r--p 00007000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db88e000-7f04db88f000 rw-p 00008000 08:22 3675995
/lib/x86_64-linux-gnu/libcrypt-2.13.so
7f04db88f000-7f04db8bd000 rw-p 00000000 00:00 0
7f04db8bd000-7f04db8e1000 r-xp 00000000 08:22 1445921
/usr/lib/libjpeg.so.62.0.0
7f04db8e1000-7f04dbae0000 ---p 00024000 08:22 1445921
/usr/lib/libjpeg.so.62.0.0
7f04dbae0000-7f04dbae1000 rw-p 00023000 08:22 1445921
/usr/lib/libjpeg.so.62.0.0
7f04dbae1000-7f04dbae3000 r-xp 00000000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbae3000-7f04dbce3000 ---p 00002000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbce3000-7f04dbce4000 r--p 00002000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbce4000-7f04dbce5000 rw-p 00003000 08:22 3676009
/lib/x86_64-linux-gnu/libdl-2.13.so
7f04dbce5000-7f04dbd66000 r-xp 00000000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbd66000-7f04dbf65000 ---p 00081000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbf65000-7f04dbf66000 r--p 00080000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbf66000-7f04dbf67000 rw-p 00081000 08:22 3676000
/lib/x86_64-linux-gnu/libm-2.13.so
7f04dbf67000-7f04dbf7e000 r-xp 00000000 08:22 1444016
/usr/lib/libz.so.1.2.3.4
7f04dbf7e000-7f04dc17d000 ---p 00017000 08:22 1444016
/usr/lib/libz.so.1.2.3.4
7f04dc17d000-7f04dc17e000 rw-p 00016000 08:22 1444016
/usr/lib/libz.so.1.2.3.4
7f04dc17e000-7f04dc19d000 r-xp 00000000 08:22 3677025
/lib/x86_64-linux-gnu/ld-2.13.so
7f04dc25a000-7f04dc2ba000 rw-s 00000000 00:04 7929868
/SYSV00000000 (deleted)
7f04dc2ba000-7f04dc31a000 rw-s 00000000 00:04 7897099
/SYSV00000000 (deleted)
7f04dc31a000-7f04dc37a000 rw-s 00000000 00:04 7831561
/SYSV00000000 (deleted)
7f04dc37a000-7f04dc37f000 rw-p 00000000 00:00 0
7f04dc39b000-7f04dc39d000 rw-p 00000000 00:00 0
7f04dc39d000-7f04dc39e000 r--p 0001f000 08:22 3677025
/lib/x86_64-linux-gnu/ld-2.13.so
7f04dc39e000-7f04dc39f000 rw-p 00020000 08:22 3677025
/lib/x86_64-linux-gnu/ld-2.13.so
7f04dc39f000-7f04dc3a0000 rw-p 00000000 00:00 0
7fffc7cc0000-7fffc7ce1000 rw-p 00000000 00:00 0 [stack]
7fffc7df3000-7fffc7df4000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]

Justin.