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Opened 3 years ago

Closed 2 years ago

#9547 closed Bug Report - Crash (Fixed)

[CRASH] Seg. fault while navigating Program Guide

Reported by: Zooka <mythtv@…> Owned by:
Priority: minor Milestone: 0.25
Component: MythTV - General Version: 0.24-fixes
Severity: medium Keywords: program guide
Cc: Ticket locked: no

Description

Random crashes while navigating the Program Guide. Unable to reproduce consistently but with enough time spent navigating the Guide it will eventually crash.

Attachments (2)

gdb.txt (31.7 KB) - added by Zooka <mythtv@…> 3 years ago.
Backtrace
version.txt (587 bytes) - added by Zooka <mythtv@…> 3 years ago.
mythfrontend version

Download all attachments as: .zip

Change History (21)

Changed 3 years ago by Zooka <mythtv@…>

Backtrace

Changed 3 years ago by Zooka <mythtv@…>

mythfrontend version

comment:1 Changed 3 years ago by Søren Holstebroe <holostebroe@…>

This problem also happens to me frequently.

From frontend log:

2011-02-15 17:34:17.535 [mp2 @ 0x7f90e403f5e0]incomplete frame
2011-02-15 17:34:17.535 AFD Error: Unknown audio decoding error
2011-02-15 17:34:17.857 Marking recording as watched using offset 4 minutes
2011-02-15 17:34:17.857 TV: Attempting to change from WatchingPreRecorded to None
2011-02-15 17:34:17.877 Trying 1680x1050 0.000 Hz
2011-02-15 17:34:17.877 SwitchToGUI: Switched to 1680x1050 0.000 Hz
2011-02-15 17:34:18.044 Pulse: PulseAudio resume OK
2011-02-15 17:34:18.050 TV: Changing from WatchingPreRecorded to None
2011-02-15 17:34:18.059 TV: Attempting to change from None to None
*** glibc detected *** /usr/bin/mythfrontend.real: malloc(): memory corruption (fast): 0x00007f90c4b81fff ***
======= Backtrace: =========
/lib/libc.so.6(+0x774b6)[0x7f90dab4f4b6]
/lib/libc.so.6(+0x7b781)[0x7f90dab53781]
/lib/libc.so.6(__libc_malloc+0x6e)[0x7f90dab5438e]
/usr/lib/nvidia-current/libGL.so.1(+0x9ab15)[0x7f90de8d5b15]

I use

MythTV Version   : v0.24-151-g1a69c92
MythTV Branch    : fixes/0.24
Network Protocol : 63
Library API      : 0.24.20101129-1
QT Version       : 4.7.0

comment:2 Changed 3 years ago by beirdo

  • Summary changed from Seg. fault while navigating Program Guide to [CRASH] Seg. fault while navigating Program Guide

comment:3 Changed 3 years ago by Zooka <mythtv@…>

Crash does not appear to be affected by theme, has crashed with Mythcenter-wide and Blue Abstract.

comment:4 Changed 3 years ago by ajlill@…

I think I am being affected by the same bug, at least I am getting the same type of glibc messages. My problem is not in the program guide, but in the Schedule Recordings->Search Lists menus

If you use the bando-blue theme, you can replicate it fairly consistently by going to Schedule->Search Lists->New Titles, then use the END key to change categories. I also get it in Schedule->Search Lists->Channels using the END key or the 1 and 2 keys to change the sort order. It doesn't happen every time, just 90% of the time, making these screens practically unusable under that theme. Using mythcenter-wide, it happens much less frequently, but still very annoying.

*** glibc detected *** mythfrontend: double free or corruption (fasttop): 0x00002b707c8e3c80 ***
======= Backtrace: =========
/lib/libc.so.6(+0x775b6)[0x2b7062d8e5b6]
/lib/libc.so.6(cfree+0x73)[0x2b7062d94e83]
/usr/lib/libQtGui.so.4(_ZN7QRegion7cleanUpEPNS_11QRegionDataE+0x2d)[0x2b706147caad]
/opt/myth-0.24/lib/libmythui-0.24.so.0(_ZN10MythUIType19SetChildNeedsRedrawEPS_+0xce)[0x2b705aebfc1e]
/opt/myth-0.24/lib/libmythui-0.24.so.0(_ZN10MythUIType9SetRedrawEv+0xcc)[0x2b705aebfd6c]
/opt/myth-0.24/lib/libmythui-0.24.so.0(_ZN10MythUIText12SetFontStateERK7QString+0x90)[0x2b705aed8fb0]
/opt/myth-0.24/lib/libmythui-0.24.so.0(_ZN10MythUIText5ResetEv+0x43)[0x2b705aed9273]
/opt/myth-0.24/lib/libmythui-0.24.so.0(_ZN10MythUIType5ResetEv+0x156)[0x2b705aec28b6]
======= Memory map: ========

comment:5 Changed 3 years ago by allangregersen@…

This bug is really annoying. I can reproduce with ArchLight? consistently. Basically the program guide is unuasble now!

comment:6 Changed 3 years ago by robertm

  • Ticket locked set

Please read the ticket howto, this ticket is now locked to everyone because you needed to use it as a billboard for your frustration.

comment:7 Changed 3 years ago by paulh

I've seen many segfaults similar to this. The problem is the main thread and the ImageLoadThread? both trying to access/update stuff in MythUIImage at the same time.

comment:8 Changed 3 years ago by Github

Initialize the MythUIImage filename correctly

Fixes #9634. Fixes #9708. Refs #9547.

If the filename does not start with "/", "http://", "https://" or "ftp://", then
the actual filename loaded is uninitialized. It can be any random crap on the
stack. I'm honestly surprised this worked at all :)

This may fix things for #9547 as well, and should be tested with that
scenario too.

Branch: master
Changeset: 2c7735e7f80b5d2737d2bc8c4e9144f3e42da2e7

comment:9 Changed 3 years ago by beirdo

  • Status changed from new to infoneeded_new

Please retest with the fix as above (c321ee6a821f2a773f0d8d158d27d83b70c9332d on fixes/0.24)

comment:10 Changed 3 years ago by beirdo

  • Ticket locked unset

Unlocking for response from original poster to whether this still occurs with the changeset above.

comment:11 Changed 3 years ago by Github

Revert "Initialize the MythUIImage filename correctly"

This reverts commit 2c7735e7f80b5d2737d2bc8c4e9144f3e42da2e7.

Opens #9634. Opens #9708. Refs #9547.

Branch: master
Changeset: 2b52eb40f2ddc9cf2c85c8edf1baab7210ab7619

comment:12 Changed 3 years ago by mdean

See, also, #9783

comment:13 Changed 3 years ago by wagnerrp

  • Status changed from infoneeded_new to new

Reverted at 1605466620e84. removing infoneeded tag.

comment:14 Changed 3 years ago by beirdo

  • Type changed from Bug Report to Bug Report - Crash

comment:15 Changed 3 years ago by beirdo

See also #9388, #9634

comment:16 Changed 3 years ago by paulh

It's not exactly clear looking at the BT but this looks suspiciously like another case of two threads trying to update a MythUIType at the same time. Refs #10073

comment:17 Changed 3 years ago by Zooka <mythtv@…>

Please let me know if I can provide any more information.

comment:18 Changed 2 years ago by beirdo

  • Status changed from new to infoneeded_new

Now that #9388 has been fixed, please see if this is reproducable. If not, I think we can consider it closed by that fix.

comment:19 Changed 2 years ago by wagnerrp

  • Milestone changed from unknown to 0.25
  • Resolution set to Fixed
  • Status changed from infoneeded_new to closed

Possible resolution applied at 02f8352b91d8f, with no further response from reporter. Assume fixed. Ticket can be re-opened if problem persists.

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