With the latest server and synaptics driver from git I can reliably crash the server by starting
xinput test "SynPS2/2 Synaptics Touchpad" and then clicking the any of the physical buttons or tapping the pad to simulate a click. Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7f808f66b6f0 (LWP 22831)] XkbFilterEvents (pClient=0x46d2e80, nEvents=1, xE=0x45b5580) at xkbEvents.c:822 /usr/src/debug/x11-base/xorg-server-9999/xorg- server-9999/xkb/xkbEvents.c:822:23919:beg:0x554d35 (gdb) backtrace #0 XkbFilterEvents (pClient=0x46d2e80, nEvents=1, xE=0x45b5580) at xkbEvents.c:822 #1 0x00000000004505ad in WriteEventsToClient (pClient=0x46d2e80, count=1, events=0x45b5580) at events.c:5938 #2 0x00000000004546c5 in TryClientEvents (client=0x46d2e80, dev=<value optimized out>, pEvents=0x45b5580, count=1, mask=2540292784, filter=41155024, grab=0x0) at events.c:1985 #3 0x000000000045532c in DeliverEventsToWindow (pDev=0x2ac7d40, pWin=0x27b42f0, pEvents=0x45b5580, count=1, filter=4, grab=0x0, mskidx=2) at events.c:2122 #4 0x0000000000456f25 in DeliverDeviceEvents (pWin=0x27b42f0, xE=0x45b5580, grab=0x0, stopAt=0x0, dev=0x2ac7d40, count=1) at events.c:2420 #5 0x0000000000537ecd in ProcessOtherEvent (xE=0x45b5580, device=0x2ac7d40, count=1) at exevents.c:1126 #6 0x00000000005603cd in ProcessKeyboardEvent (xE=0x45b5580, keybd=0x2ac7d40, count=1) at xkbPrKeyEv.c:208 #7 0x00000000004cd11c in mieqProcessInputEvents () at mieq.c:378 #8 0x0000000000490669 in ProcessInputEvents () at xf86Events.c:174 #9 0x000000000044ae21 in Dispatch () at dispatch.c:363 #10 0x0000000000430f3d in main (argc=9, argv=0x7fff9769d128, envp=<value optimized out>) at main.c:384 The server dies because of a null pointer in Bool XkbFilterEvents(ClientPtr pClient,int nEvents,xEvent *xE) { int i, button_mask; DeviceIntPtr pXDev = inputInfo.keyboard; XkbSrvInfoPtr xkbi; if (xE->u.u.type & EXTENSION_EVENT_BASE) { pXDev = XIGetDevice(xE); if (!pXDev) pXDev = inputInfo.keyboard; } xkbi= pXDev->key->xkbInfo; ^ | key is NULL on crash Why would a touchpad be treated as a keyboard here? Regards, Magnus Kessler
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