[Wayland-bugs] [Bug 108249] [xwayland] Crash in Xpresent code on resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108249

            Bug ID: 108249
           Summary: [xwayland] Crash in Xpresent code on resume from
                    suspend
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: XWayland
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: fourdan at xfce.org
        QA Contact: xorg-team at lists.x.org

Created attachment 141909
  --> https://bugs.freedesktop.org/attachment.cgi?id=141909&action=edit
gdb bt full

Description:

Downstream report of a crash after resuming from suspend.

Steps to reproduce:

1. suspend the laptop while docked and connected to two external displays
2. undock the laptop
3. resume the laptop

Additional data:

Xwayland crashes in xwl_present_sync_callback():

(gdb) bt
#0  0x00007fa32bfb353f in raise () from /lib64/libc.so.6
#1  0x00007fa32bf9d895 in abort () from /lib64/libc.so.6
#2  0x00000000005943f0 in OsAbort () at utils.c:1350
#3  0x0000000000599689 in AbortServer () at log.c:877
#4  0x000000000059a4fd in FatalError (f=f at entry=0x5c0770 "Caught signal %d
(%s). Server aborting\n") at log.c:1015
#5  0x00000000005916f5 in OsSigHandler (signo=11, sip=<optimized out>,
unused=<optimized out>) at osinit.c:156
#6  <signal handler called>
#7  dixGetPrivate (key=<optimized out>, privates=0xf000000000404) at
../include/privates.h:122
#8  dixLookupPrivate (key=<optimized out>, privates=0xf000000000404) at
../include/privates.h:166
#9  present_screen_priv (screen=0xf000000000034) at present_priv.h:198
#10 present_wnmd_flip (damage=0xf4eee0, sync_flip=0, pixmap=0xf507a0,
target_msc=268904, event_id=1985548, crtc=0xaa85b0, 
    window=0xf4ee90) at present_wnmd.c:358
#11 present_wnmd_execute (vblank=0x5e3f1a0, ust=15397860691, crtc_msc=268904)
at present_wnmd.c:466
#12 0x00000000004f8ac8 in present_wnmd_re_execute (vblank=0x5e3f1a0) at
present_wnmd.c:80
#13 0x00000000004392a7 in xwl_present_sync_callback (data=0x134e860,
callback=<optimized out>, time=<optimized out>)
    at xwayland-present.c:287
#14 0x00007fa32bebcace in ffi_call_unix64 () from /lib64/libffi.so.6
#15 0x00007fa32bebc48f in ffi_call () from /lib64/libffi.so.6
#16 0x00007fa32c6b47ad in wl_closure_invoke (closure=closure at entry=0xaa8ff0,
flags=flags at entry=1, target=<optimized out>, 
    target at entry=0x5e10480, opcode=opcode at entry=0, data=<optimized out>) at
src/connection.c:1006
#17 0x00007fa32c6b0f09 in dispatch_event (display=display at entry=0xaa1a10,
queue=<optimized out>) at src/wayland-client.c:1427
#18 0x00007fa32c6b241c in dispatch_queue (queue=0xaa1ad8, display=0xaa1a10) at
src/wayland-client.c:1573
#19 wl_display_dispatch_queue_pending (display=0xaa1a10, queue=0xaa1ad8) at
src/wayland-client.c:1815
#20 0x00007fa32c6b2480 in wl_display_dispatch_pending (display=<optimized out>)
at src/wayland-client.c:1878
#21 0x000000000042ee1b in xwl_read_events (xwl_screen=0xa95d10) at
xwayland.c:814
#22 0x00000000005920e1 in ospoll_wait (ospoll=0xa8b6b0, timeout=<optimized
out>) at ospoll.c:651
#23 0x000000000058b9b3 in WaitForSomething (are_ready=0) at WaitFor.c:208
#24 0x000000000055b540 in Dispatch () at ../include/list.h:220
#25 0x000000000055f7d6 in dix_main (argc=12, argv=0x7ffee130c658,
envp=<optimized out>) at main.c:276
#26 0x00007fa32bf9f413 in __libc_start_main () from /lib64/libc.so.6
#27 0x000000000042e33e in _start ()

(gdb) f 9
#9  present_screen_priv (screen=0xf000000000034) at present_priv.h:198
198         return
(present_screen_priv_ptr)dixLookupPrivate(&(screen)->devPrivates,
&present_screen_private_key);
(gdb) p *screen
Cannot access memory at address 0xf000000000034

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