[Bug 950] New: Xfbdev / tslib segfault in ts_close()

bugzilla-daemon at bugzilla.openmoko.org bugzilla-daemon at bugzilla.openmoko.org
Sat Oct 20 08:17:37 CEST 2007


           Summary: Xfbdev / tslib segfault in ts_close()
           Product: OpenMoko
           Version: 2007.2
          Platform: Neo1973
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Xfbdev (kdrive)
        AssignedTo: mickey at vanille-media.de
        ReportedBy: mail at mmontour.net
                CC: buglog at lists.openmoko.org

Software built today using MokoMakefile, 2007.2 target. 

I was manually starting and stopping /etc/init.d/xserver-nodm, and obtained the
following segfault (not reliably reproducible):

Loaded symbols for /usr/lib/ts//linear.so
Core was generated by `/usr/bin/Xfbdev :0 -pn -dpi 285 -screen 480x640
-hide-cursor -root-ppm /usr/sha'.
Program terminated with signal 11, Segmentation fault.
#0  ts_close (ts=0x0) at ts_close.c:25
25      ts_close.c: No such file or directory.
        in ts_close.c
(gdb) where
#0  ts_close (ts=0x0) at ts_close.c:25
#1  0x000efe78 in TslibFini () at tslib.c:244
#2  0x00043da0 in KdMouseProc (pDevice=0x11aa38, onoff=1116212) at kinput.c:341
#3  0x000235c0 in CloseDevice (dev=0x11aa38) at devices.c:209
#4  0x0002370c in CloseDownDevices () at devices.c:290
#5  0x00014c08 in main (argc=65535, argv=0x20, envp=<value optimized out>)
    at main.c:464
#6  0x40216a10 in __libc_start_main (main=0, argc=0, ubp_av=0x12494, 
    init=0xf324c <__libc_csu_init>, fini=0xf3248 <__libc_csu_fini>, 
    rtld_fini=0xbeb64e6f, stack_end=0xbeb64d54) at libc-start.c:231
#7  0x000124bc in _start ()

A fragment of the code in question (tslib.c) is shown below.

static void
TslibFini (void)
    KdMouseInfo	*mi;

    KdUnregisterFds (TsInputType, TRUE);
    for (mi = kdMouseInfo; mi; mi = mi->next)
	if (mi->inputType == TsInputType)
		tsDev = NULL;
	    mi->driver    = 0;

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