Bug 73983

Summary:	Weston crashes on hotplug/unplug input device
Product:	Wayland	Reporter:	Anu Reddy <anasuyax.r.nannuri>
Component:	weston	Assignee:	Wayland bug list <wayland-bugs>
Status:	VERIFIED FIXED	QA Contact:
Severity:	critical
Priority:	medium
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	Input device gdb_backtrace input-touch-gbdbacktrace input_malloc_gdbbacktrace

Description Anu Reddy 2014-01-23 17:32:52 UTC

Hot unplug and plug input device (mouse, keyboard or touch) multiple times triggers SIGSEGV in wl_list_insert(). Perform a function while unplugging and plugging input device crashes Weston. See attached gdb backtrace for more info. 


Software Stack
Kernel: 3.9.5-301.fc19.x86_64
wayland (HEAD) remotes/origin/master-0-g47bbc6b
drm (HEAD) libdrm-2.4.50-0-g4c5de72
mesa (HEAD) remotes/origin/10.0-0-g3a62718
libva (HEAD) libva-1.2.1-0-g88ed1eb
intel-driver (HEAD) 1.2.1-0-g8f306e3
weston (HEAD) 1.3.93-0-g7cccfca

Comment 1 Anu Reddy 2014-01-23 17:34:52 UTC

Created attachment 92686 [details]
Input device gdb_backtrace

Comment 2 Anu Reddy 2014-01-23 17:52:10 UTC

Created attachment 92688 [details]
input-touch-gbdbacktrace

Comment 3 Anu Reddy 2014-01-23 17:53:40 UTC

Created attachment 92689 [details]
input_malloc_gdbbacktrace

Comment 4 U. Artie Eoff 2014-01-23 20:31:03 UTC

Caused by a corrupted output->destroy_signal list.  The following commit also resolves this issue:

commit 8259728a569e973a8895b919ba057740a813f52a
Author: Kristian Høgsberg <krh@bitplanet.net>
Date:   Wed Jan 22 11:03:50 2014 -0800

    evdev: Remove output destroy notifier on device destroy
    
    Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=73895

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