[gstreamer-bugs] [Bug 628640] New: v4l2src crashes if device is busy

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=628640
  GStreamer | gst-plugins-good | 0.10.21

           Summary: v4l2src crashes if device is busy
    Classification: Desktop
           Product: GStreamer
           Version: 0.10.21
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: 4ernov at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
      GNOME target: ---
     GNOME version: ---


Created an attachment (id=169392)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=169392)
Test program

v4l2src crashes if capture device (i.e. /dev/video0 or so) is busy. It prints
all the necessary errors ok but continue pending PLAYING state instead of going
to NULL. 100% reproducible.

To reproduce:
1. Start the 1st instance of attached sample program (it uses /dev/video0). See
the process is ok.
2. Start the second instance of it. Mention how it fails with segmentation
fault.

I've switched on debug level to INFO in the sample program, it shows that the
process overall goes normally but skips fatal errors and crashes.

Backtrace:
#0  0x00000000 in ?? ()
#1  0x0065ae1e in gst_v4l2src_create (src=0x8180000, buf=0xb7e5221c) at
gstv4l2src.c:914
#2  0x0069c765 in gst_push_src_create (bsrc=0x8180000,
offset=18446744073709551615, length=4096, ret=0xb7e5221c) at gstpushsrc.c:117
#3  0x00689881 in gst_base_src_get_range (src=<value optimized out>,
offset=18446744073709551615, length=4096, buf=0xb7e5221c) at gstbasesrc.c:2081
#4  0x0068c327 in gst_base_src_loop (pad=0x8181008) at gstbasesrc.c:2334
#5  0x001abd6b in gst_task_func (task=0x818c060) at gsttask.c:238
#6  0x001ad377 in default_func (tdata=0x805cad8, pool=0x8059010) at
gsttaskpool.c:70
#7  0x003d3d0c in ?? () from /lib/libglib-2.0.so.0
#8  0x003d1def in ?? () from /lib/libglib-2.0.so.0
#9  0x0043b96e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#10 0x0051ca4e in clone () from /lib/tls/i686/cmov/libc.so.6

Source code of test program and output log of the 2nd instance is attached.

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