[Wayland-bugs] [Bug 77341] New: SIGSEGV in handle_touch_with_coords

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=77341

          Priority: medium
            Bug ID: 77341
          Assignee: wayland-bugs at lists.freedesktop.org
           Summary: SIGSEGV in handle_touch_with_coords
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: anasuyax.r.nannuri at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: libinput
           Product: Wayland

Weston crashes when it cannot find the touch device output. See attached
gdb_backtrace for more info. There are different ways to reproduce this bug.

1st method to reproduce:
======================
1. Identify two displays as display1 and display2 
2. Display2 is a touch device
3. Disconnect display2 monitor (touch is still working)
4. Execute weston-launch
5. Touch display2 screen. Observe weston crash.


2nd method to reproduce:
======================
1. Create a udev mapping rule in /etc/udev/rules.d/weston.rules with wrong
display name. 

   Example:   
   ENV{ID_VENDER_ID}=="2149", ENV{ID_MODEL_ID}=="2122", ENV{WL_OUTPUT}="HDMI3"
   (Here instead of VGA1, I gave incorrect display name)

2. Unplug and Replug USB touch device to apply new udev rules. 
3. Start Weston 
4. Touch the display. Observe weston crash.


Software Stack
==============
Kernel: 3.13.6-200.fc20.x86_64
Systemd: 212 (rawhide)
wayland (HEAD) 1.4.91-0-g5e2cfd2
drm (HEAD) libdrm-2.4.52-0-g46d451c
mesa (HEAD) mesa-10.1-0-g4a86465
libva (HEAD) libva-1.2.1-0-g88ed1eb
intel-driver (HEAD) 1.2.2-0-g121e70d
cairo (HEAD) heads/1.12-0-g59e2a93
libinput (HEAD) remotes/origin/HEAD-0-gc5c503c
weston (HEAD) 1.4.91-0-g79d5a6e

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