Bug#735898: pavucontrol segmentation fault
John M.
jwmwalrus at gmail.com
Sat Feb 22 23:58:08 UTC 2014
Done:
~$ gdb `which pavucontrol`
GNU gdb (GDB) 7.6.2 (Debian 7.6.2-1)
Copyright (C) 2013 Free Software Foundation, Inc.
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This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /usr/bin/pavucontrol...done.
(gdb) set logging on
Copying output to gdb.txt.
(gdb) run
Starting program: /usr/bin/pavucontrol
warning: no loadable sections found in added symbol-file system-supplied
DSO at 0x7ffff7ffa000
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library
"/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe874a700 (LWP 19970)]
Program received signal SIGSEGV, Segmentation fault.
0x0000000000428d80 in read_callback (s=0xcea800, length=4,
userdata=0x9561b0) at mainwindow.cc:385
385 v = ((const float*) data)[length / sizeof(float) -1];
(gdb) backtrace
#0 0x0000000000428d80 in read_callback (s=0xcea800, length=4,
userdata=0x9561b0) at mainwindow.cc:385
#1 0x00007ffff3adad8b in ?? ()
from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2 0x00007fffee0bb46d in ?? ()
from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
#3 0x00007ffff3d17b77 in ?? ()
from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#4 0x00007ffff3f63526 in g_main_context_dispatch ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007ffff3f63878 in ?? ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6 0x00007ffff3f63b3a in g_main_loop_run ()
from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7 0x00007ffff59a444d in gtk_main ()
from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#8 0x00007ffff7a1a8f1 in Gtk::Main::run(Gtk::Window&) ()
from /usr/lib/x86_64-linux-gnu/libgtkmm-3.0.so.1
#9 0x0000000000438981 in main (argc=1, argv=0x7fffffffdb28) at
pavucontrol.cc:670
(gdb) frame 9
#9 0x0000000000438981 in main (argc=1, argv=0x7fffffffdb28) at
pavucontrol.cc:670
670 Gtk::Main::run(*mainWindow);
(gdb) frame 0
#0 0x0000000000428d80 in read_callback (s=0xcea800, length=4,
userdata=0x9561b0) at mainwindow.cc:385
385 v = ((const float*) data)[length / sizeof(float) -1];
(gdb) kill
Kill the program being debugged? (y or n) y
(gdb) q
gdb.txt is attached.
--
John
On Sun, 2014-02-23 at 00:19 +0100, Simone Vellei wrote:
> Hi John,
>
> maybe we can investigate also with gdb compiling pavucontrol with
> debug symbols:
>
>
> $ apt-get source pavucontrol && cd pavucontrol-1.0
> $ export DEB_BUILD_OPTIONS="nostrip noopt"
> $ dpkg-buildpackage -rfakeroot -uc -us
>
>
> $ sudo dpkg -i ../pavucontrol_1.0-1_i386.deb
>
> $ gdb pavucontrol
>
>
> and attach here gdb output.
>
>
>
> 2014-02-22 23:09 GMT+01:00 John M. <jwmwalrus at gmail.com>:
>
> Hi,
>
> Running
>
> $ strace pavucontrol > ~/pavucontrol-strace.txt 2>&1
>
>
> shows that the segfault occurs while trying to
> open /dev/shm/pulse-shm-1589235082:
>
> open("/dev/shm/pulse-shm-1589235082", O_RDONLY|
> O_NOFOLLOW|O_CLOEXEC) = -1 ENOENT (No such file or
> directory)
> --- SIGSEGV (Segmentation fault) @ 0 (0) ---
> +++ killed by SIGSEGV +++
>
>
> The contents of /dev/shm are:
>
>
> $ ll /dev/shm
> total 280
> drwxrwxrwt 2 root root 80 Feb 22 16:23 ./
> drwxr-xr-x 19 root root 3440 Feb 22 13:44 ../
> -rwx------ 1 jwm jwm 67108904 Feb 22 16:10
> pulse-shm-1113234651*
> -rwx------ 1 jwm jwm 67108904 Feb 22 16:23
> pulse-shm-4016602654*
>
>
> strace shows the following, when opening the /dev/shm
> directory:
>
> openat(AT_FDCWD, "/dev/shm/", O_RDONLY|O_NONBLOCK|
> O_DIRECTORY|O_CLOEXEC) = 10
> getdents(10, /* 5 entries */, 32768) = 168
>
>
> So maybe pavucontrol is relying on a wrong number of
> pulse-related devices.
>
> By ending the desktop session, killing all pulseaudio
> instances, starting a new desktop session, and running strace
> again, I get similar results.
>
> The strace output is attached.
>
> --
> John
>
>
>
>
>
> On Fri, 2014-02-14 at 09:25 +0100, Vincent Lefevre wrote:
>
> > On 2014-02-14 02:40:36 -0500, John M. wrote:
> > > By creating a new user account, I'm able to open pavucontrol from that
> > > account, but only until I log out and in again. Then it's back to
> > > segmentation fault.
> > >
> > > So it seems like the problem is related to a setting in some other
> > > program (gconf? dconf? gstreamer? jack?).
> >
> > You can try to see with strace.
> >
>
>
>
>
>
>
>
> --
>
> Simone Vellei (henomis)
>
>
>
> GPG KEYID: A3D37CF4
>
>
> GPG FINGERPRINT: 5A79 3A3A 143E 9B37 9B38 FB86 8E45 8B62 A3D3 7CF4
>
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Starting program: /usr/bin/pavucontrol
warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff7ffa000
warning: Could not load shared library symbols for linux-vdso.so.1.
Do you need "set solib-search-path" or "set sysroot"?
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffe874a700 (LWP 19970)]
Program received signal SIGSEGV, Segmentation fault.
0x0000000000428d80 in read_callback (s=0xcea800, length=4, userdata=0x9561b0) at mainwindow.cc:385
385 v = ((const float*) data)[length / sizeof(float) -1];
#0 0x0000000000428d80 in read_callback (s=0xcea800, length=4, userdata=0x9561b0) at mainwindow.cc:385
#1 0x00007ffff3adad8b in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2 0x00007fffee0bb46d in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
#3 0x00007ffff3d17b77 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#4 0x00007ffff3f63526 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007ffff3f63878 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6 0x00007ffff3f63b3a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7 0x00007ffff59a444d in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#8 0x00007ffff7a1a8f1 in Gtk::Main::run(Gtk::Window&) () from /usr/lib/x86_64-linux-gnu/libgtkmm-3.0.so.1
#9 0x0000000000438981 in main (argc=1, argv=0x7fffffffdb28) at pavucontrol.cc:670
#9 0x0000000000438981 in main (argc=1, argv=0x7fffffffdb28) at pavucontrol.cc:670
670 Gtk::Main::run(*mainWindow);
#0 0x0000000000428d80 in read_callback (s=0xcea800, length=4, userdata=0x9561b0) at mainwindow.cc:385
385 v = ((const float*) data)[length / sizeof(float) -1];
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