dbus-launch crashed with SIGSEGV in read()

Bug #336849 reported by pitwalker on 2009-03-02
6
Affects Status Importance Assigned to Milestone
D-Bus
Invalid
Medium
dbus (Ubuntu)
Medium
Unassigned

Bug Description

Binary package hint: dbus

I start a gnome-terminal (l run su and mc)
I start a firexox
I start a guest session (I launch gedit)
I switch back to the previous user and the crash report comes
everyting works

(I run Jaunty under virtualbox 2.1.4, I have kernel oops in every login.)

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/dbus-launch
Package: dbus-x11 1.2.12-0ubuntu2
ProcCmdline: /usr/bin/dbus-launch --exit-with-session /usr/bin/pulse-session /usr/bin/seahorse-agent --execute /usr/bin/gnome-session
ProcEnviron:
 LANG=hu_HU.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: dbus
StacktraceTop:
 read () from /lib/tls/i686/cmov/libc.so.6
 ?? () from /usr/lib/libxcb.so.1
 xcb_poll_for_event () from /usr/lib/libxcb.so.1
 ?? () from /usr/lib/libX11.so.6
 ?? () from /usr/lib/libX11.so.6
Title: dbus-launch crashed with SIGSEGV in read()
Uname: Linux 2.6.28-8-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

pitwalker (pitwalker) wrote :

StacktraceTop:read () from /lib/tls/i686/cmov/libc.so.6
_xcb_in_read (c=0x8464e08) at /usr/include/bits/unistd.h:45
xcb_poll_for_event (c=0x8464e08)
wait_or_poll_for_event (dpy=0x8464690, wait=11)
process_responses (dpy=0x8464690, wait_for_first_event=0,

Changed in dbus:
importance: Undecided → Medium

Filed in Launchpad:

#0 0xb7f2ee52 in read () from /lib/tls/i686/cmov/libc.so.6
No locals.
#1 0xb7e49bfe in _xcb_in_read (c=0x8464e08) at /usr/include/bits/unistd.h:45
 n = 32
#2 0xb7e4a2a0 in xcb_poll_for_event (c=0x8464e08)
    at /build/buildd/libxcb-1.1.93/./src/xcb_in.c:439
 ret = (xcb_generic_event_t *) 0x0
#3 0xb7fff459 in wait_or_poll_for_event (dpy=0x8464690, wait=11)
    at ../../src/xcb_io.c:145
 c = (xcb_connection_t *) 0x8464e08
 event = <value optimized out>
#4 0xb7fff607 in process_responses (dpy=0x8464690, wait_for_first_event=0,
    current_error=0x0, current_request=0) at ../../src/xcb_io.c:209
 req = (PendingRequest *) 0x846e280
 event_sequence = <value optimized out>
 reply = (void *) 0xb80dd828
 event = (xcb_generic_event_t *) 0x846e128
 error = (xcb_generic_error_t *) 0xb80cde7b
 c = (xcb_connection_t *) 0x8464e08
 __PRETTY_FUNCTION__ = "process_responses"
#5 0xb80000e5 in _XEventsQueued (dpy=0x8464690, mode=2)
    at ../../src/xcb_io.c:256
No locals.
#6 0xb7fe8738 in XPending (dpy=0x8464690) at ../../src/Pending.c:56
 ret_val = 0
#7 0x0804b396 in x11_handle_event () at dbus-launch-x11.c:453
No locals.
#8 0x080498bd in kill_bus_when_session_ends () at dbus-launch.c:471
 tty_fd = -1
 x_fd = 6
 read_set = {__fds_bits = {64, 0 <repeats 31 times>}}
 err_set = {__fds_bits = {0 <repeats 32 times>}}
 act = {__sigaction_handler = {
    sa_handler = 0x80494a0 <signal_handler>,
    sa_sigaction = 0x80494a0 <signal_handler>}, sa_mask = {__val = {
      0 <repeats 32 times>}}, sa_flags = 0, sa_restorer = 0xbfcdb21c}
 empty_mask = {__val = {0 <repeats 32 times>}}
#9 0x0804a97f in main (argc=6, argv=0xbfcdb8b4) at dbus-launch.c:649
 write_pid_fd_as_string = "e0e108b621904f2255ed69a749a843b4\000\000\000\000\004\000\000\000Î\005\f¸\220\002\f¸\000\000\000\000\000\000\000\000õP\r¸\b\000\000"
 write_address_fd_as_string = '\0' <repeats 36 times>, "õÌÍ¿N\237ì·ÙÁ÷·ôß\004\b\b¸Í¿l\217\004\bô\237û·"
 prev_arg = 0xbfcdcd0a "--exit-with-session"
 shname = <value optimized out>
 runprog = 0xbfcdcd1e "/usr/bin/pulse-session"
 remaining_args = 3
 exit_with_session = 1
 binary_syntax = 0
 c_shell_syntax = 0
 bourne_shell_syntax = 0
 auto_shell_syntax = 0
 autolaunch = 0
 requires_arg = 0
 close_stderr = 0
 i = <value optimized out>
 bus_pid_to_launcher_pipe = {4, 6}
 bus_pid_to_babysitter_pipe = {10, 11}
 bus_address_to_launcher_pipe = {8, 9}
 config_file = 0x0

Changed in dbus (Ubuntu):
status: New → Triaged
Changed in dbus:
status: Unknown → Confirmed
Changed in dbus:
importance: Unknown → Medium
Changed in dbus:
importance: Medium → Unknown
Changed in dbus:
importance: Unknown → Medium

I think it's safe to say this is in the category of "a bug was auto-filed in Launchpad and nobody knows how to reproduce it". It might even be an xcb bug anyway.

Changed in dbus:
status: Confirmed → Invalid
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