Bug 709296 – crashes if totem_pl_parser_load_http_itunes fails

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Bug 709296 - crashes if totem_pl_parser_load_http_itunes fails


Summary:	crashes if totem_pl_parser_load_http_itunes fails


Status:	RESOLVED FIXED

Product:	totem-pl-parser
Classification:	Core
Component:	General
Version:	3.10.x
Hardware:	Other Linux

Importance:	Normal critical
Target Milestone:	---
Assigned To:	totem-pl-parser-maint
QA Contact:	totem-pl-parser-maint

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2013-10-02 18:19 UTC by Jean-François Fortin Tam
Modified:	2013-10-06 12:38 UTC

See Also:
GNOME target:	---
GNOME version:	---

Attachments
plparse: Fix possible crash in iTunes Podcast parsing (1.98 KB, patch) 2013-10-06 12:38 UTC, Bastien Nocera	committed	Details \| Review

Description Jean-François Fortin Tam 2013-10-02 18:19:29 UTC

I built RB 3.0 from the tarball and, unlike 2.99.x available in Fedora 19, I very often get crashes. It seems to be random, ie seeking back to the same position (or nearby) in the song or podcast that I was playing when it crashed does not cause it to crash again.

To reproduce, I just have to let it sit playing music. It doesn't have to switch songs, you can let it play a 2h-long music podcast and it will most likely crash.


Here is the result of running it through gdb (it crashed maybe 1-1.5h into the podcast):



jeff@krom:~$ gdb /usr/local/bin/rhythmbox
GNU gdb (GDB) Fedora 7.6.1-41.fc19
Reading symbols from /usr/local/bin/rhythmbox...done.
(gdb) run
Starting program: /usr/local/bin/rhythmbox 
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.3600.3-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib64/libgobject-2.0.so.0.3600.3-gdb.py", line 9, in <module>
    from gobject import register
  File "/usr/share/glib-2.0/gdb/gobject.py", line 3, in <module>
    import gdb.backtrace
ImportError: No module named backtrace
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Missing separate debuginfo for /lib64/libgraphite2.so.3
Try: yum --enablerepo='*debug*' install /usr/lib/debug/.build-id/a1/aa32c91bc181cb69ebc81bbfd03a1349ea4e33.debug
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(rhythmbox:3794): GdkPixbuf-CRITICAL **: gdk_pixbuf_scale_simple: assertion `dest_width > 0' failed
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[Thread 0x7fff9fffe700 (LWP 5391) exited]
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[Thread 0x7fffd08f8700 (LWP 5471) exited]
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[Thread 0x7fffd08f8700 (LWP 5472) exited]
[Thread 0x7fff9fffe700 (LWP 5470) exited]
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[Thread 0x7fffd08f8700 (LWP 5642) exited]
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[Thread 0x7fffd08f8700 (LWP 5643) exited]
[Thread 0x7fff9fffe700 (LWP 5641) exited]
[New Thread 0x7fff9fffe700 (LWP 5690)]
[New Thread 0x7fffd08f8700 (LWP 5691)]
[Thread 0x7fffd08f8700 (LWP 5691) exited]
[New Thread 0x7fffd08f8700 (LWP 5692)]
[Thread 0x7fffd08f8700 (LWP 5692) exited]
[Thread 0x7fff9fffe700 (LWP 5690) exited]
[New Thread 0x7fff9fffe700 (LWP 5942)]
[New Thread 0x7fffd08f8700 (LWP 5943)]
[Thread 0x7fffd08f8700 (LWP 5943) exited]
[New Thread 0x7fffd08f8700 (LWP 5945)]
[Thread 0x7fffd08f8700 (LWP 5945) exited]
[Thread 0x7fff9fffe700 (LWP 5942) exited]
[New Thread 0x7fff9fffe700 (LWP 5971)]
[New Thread 0x7fffd08f8700 (LWP 5972)]
[Thread 0x7fff9fffe700 (LWP 5971) exited]
[New Thread 0x7fff9fffe700 (LWP 5973)]
[Thread 0x7fff9fffe700 (LWP 5973) exited]
[Thread 0x7fffd08f8700 (LWP 5972) exited]
[New Thread 0x7fffd08f8700 (LWP 6010)]
[New Thread 0x7fff9fffe700 (LWP 6011)]
[Thread 0x7fffd08f8700 (LWP 6010) exited]
[New Thread 0x7fffd08f8700 (LWP 6012)]
[Thread 0x7fffd08f8700 (LWP 6012) exited]
[Thread 0x7fff9fffe700 (LWP 6011) exited]
[New Thread 0x7fff9fffe700 (LWP 6013)]
[New Thread 0x7fffd08f8700 (LWP 6014)]
[Thread 0x7fffd08f8700 (LWP 6014) exited]
[New Thread 0x7fffd08f8700 (LWP 6015)]
[Thread 0x7fffd08f8700 (LWP 6015) exited]
[Thread 0x7fff9fffe700 (LWP 6013) exited]
[New Thread 0x7fff9fffe700 (LWP 6035)]
[New Thread 0x7fffd08f8700 (LWP 6036)]
[Thread 0x7fff9fffe700 (LWP 6035) exited]
[New Thread 0x7fff9fffe700 (LWP 6037)]
[Thread 0x7fff9fffe700 (LWP 6037) exited]
[Thread 0x7fffd08f8700 (LWP 6036) exited]
[New Thread 0x7fffd08f8700 (LWP 6042)]
[New Thread 0x7fff9fffe700 (LWP 6043)]
[Thread 0x7fffd08f8700 (LWP 6042) exited]
[New Thread 0x7fffd08f8700 (LWP 6045)]
[Thread 0x7fff9fffe700 (LWP 6043) exited]
[Thread 0x7fffd08f8700 (LWP 6045) exited]
[New Thread 0x7fffd08f8700 (LWP 6075)]
[New Thread 0x7fff9fffe700 (LWP 6076)]
[Thread 0x7fffd08f8700 (LWP 6075) exited]
[New Thread 0x7fffd08f8700 (LWP 6077)]
[Thread 0x7fffd08f8700 (LWP 6077) exited]
[Thread 0x7fff9fffe700 (LWP 6076) exited]
[New Thread 0x7fff9fffe700 (LWP 6095)]
[New Thread 0x7fffd08f8700 (LWP 6096)]
[Thread 0x7fff9fffe700 (LWP 6095) exited]
[New Thread 0x7fff9fffe700 (LWP 6097)]
[Thread 0x7fff9fffe700 (LWP 6097) exited]
[Thread 0x7fffd08f8700 (LWP 6096) exited]
[New Thread 0x7fffd08f8700 (LWP 6117)]
[New Thread 0x7fff9fffe700 (LWP 6118)]
[Thread 0x7fffd08f8700 (LWP 6117) exited]
[New Thread 0x7fffd08f8700 (LWP 6119)]
[Thread 0x7fffd08f8700 (LWP 6119) exited]
[Thread 0x7fff9fffe700 (LWP 6118) exited]
[New Thread 0x7fff9fffe700 (LWP 6120)]
[New Thread 0x7fffd08f8700 (LWP 6121)]
[Thread 0x7fff9fffe700 (LWP 6120) exited]
[New Thread 0x7fff9fffe700 (LWP 6122)]
[New Thread 0x7fff9effc700 (LWP 6123)]
[New Thread 0x7fff9e7fb700 (LWP 6124)]
[Thread 0x7fff9effc700 (LWP 6123) exited]

Program received signal SIGSEGV, Segmentation fault.

+ Trace 232567

Thread 140735877736192 (LWP 6122)

#0 totem_pl_parser_add_itms
from /lib64/libtotem-plparser.so.17
#1 totem_pl_parser_parse_internal
from /lib64/libtotem-plparser.so.17
#2 totem_pl_parser_parse_with_base
from /lib64/libtotem-plparser.so.17
#3 rb_podcast_parse_load_feed
at rb-podcast-parse.c line 218
#4 rb_podcast_manager_thread_parse_feed
at rb-podcast-manager.c line 1148
#5 g_thread_proxy
from /lib64/libglib-2.0.so.0
#6 start_thread
at pthread_create.c line 308
#7 clone
at ../sysdeps/unix/sysv/linux/x86_64/clone.S line 113

Thread 218 (Thread 0x7fff9fffe700 (LWP 6122))

#0 totem_pl_parser_add_itms
from /lib64/libtotem-plparser.so.17
#1 totem_pl_parser_parse_internal
from /lib64/libtotem-plparser.so.17
#2 totem_pl_parser_parse_with_base
from /lib64/libtotem-plparser.so.17
#3 rb_podcast_parse_load_feed
at rb-podcast-parse.c line 218
#4 rb_podcast_manager_thread_parse_feed
at rb-podcast-manager.c line 1148
#5 g_thread_proxy
from /lib64/libglib-2.0.so.0
#6 start_thread
at pthread_create.c line 308
#7 clone
at ../sysdeps/unix/sysv/linux/x86_64/clone.S line 113

Comment 1 Jean-François Fortin Tam 2013-10-02 18:24:48 UTC

FWIW, in this case it crashed at 59:49 of 1:59:51 in my podcast, but I'm pretty sure seeking back to that position wouldn't trigger the issue.

Comment 2 Jonathan Matthew 2013-10-02 22:17:40 UTC

Looks like it's crashing trying to parse 'http://itunes.apple.com/us/podcast/trance-island/id554315361?mt=2&uo=4'. Can you try running the parser test program (podcast/test-podcast-parse in the rhythmbox source tree) with this url?

Comment 3 Jean-François Fortin Tam 2013-10-03 01:56:32 UTC

Indeed, running that test command with the 3.0 tarball caused an instantaneous segfault for me on the first try... but subsequent tries did not crash and printed the contents to the terminal.

The "good" news is that git master exhibits the same issue.

Comment 4 Jonathan Matthew 2013-10-03 12:37:06 UTC

By all evidence the bug is in totem-pl-parser, so if you can still reproduce it somehow, install debug symbols for that and get another stack trace.

Comment 5 Jonathan Matthew 2013-10-03 12:38:11 UTC

Output from test-podcast-parse --debug http://itunes.apple.com/... may also help.

Comment 6 Jean-François Fortin Tam 2013-10-03 15:24:28 UTC

Apparently the test-podcast-parse executable has no such thing as a --debug option... Will see if I get the same crash again with gdb now that I have totem-*debuginfo installed...

Comment 7 Jonathan Matthew 2013-10-03 21:19:31 UTC

Oops, I didn't read the code closely enough. It's the other way around, 'test-podcast-parse http://whatever/ --debug'.

Comment 8 Jean-François Fortin Tam 2013-10-04 16:52:03 UTC

Seems like this is really quite random, I spent nearly the whole day yesterday playing music and podcasts without it hanging up on me, left it paused at the end of the day, and then this morning when I went to resume playback it was hung, like this:



(gdb) bt full

+ Trace 232572

Thread 720 (Thread 0x7fff86fba700 (LWP 7332))

#0 totem_pl_parser_add_itms
at totem-pl-parser-podcast.c line 773
#1 totem_pl_parser_parse_internal
at totem-pl-parser.c line 1792
#2 totem_pl_parser_parse_with_base
at totem-pl-parser.c line 2107
#3 totem_pl_parser_parse
at totem-pl-parser.c line 2189
#4 rb_podcast_parse_load_feed
at rb-podcast-parse.c line 218
#5 rb_podcast_manager_thread_parse_feed
at rb-podcast-manager.c line 1148
#6 g_thread_proxy
at gthread.c line 798
#7 start_thread
at pthread_create.c line 308
#8 clone
at ../sysdeps/unix/sysv/linux/x86_64/clone.S line 113




Hope that trace is more helpful (and related to the same issue).

Comment 9 Jonathan Matthew 2013-10-04 22:08:33 UTC

It's pretty conclusive. totem_pl_parser_load_http_itunes returns NULL if the request fails, but neither of the callers check for that, so if the request fails they crash.

Comment 10 Bastien Nocera 2013-10-06 12:38:15 UTC

Created attachment 256564 [details] [review]
plparse: Fix possible crash in iTunes Podcast parsing

Check the return value of totem_pl_parser_load_http_itunes()
to avoid possible crash.

Comment 11 Bastien Nocera 2013-10-06 12:38:52 UTC

Attachment 256564 [details] pushed as e3ba8a9 - plparse: Fix possible crash in iTunes Podcast parsing