retitle 235914 xfree86: [libXfont] SEGV in fs_read_list_info() tag 235914 + upstream help thanks
On Sat, Mar 06, 2004 at 02:46:07PM -0800, Jeff Bowden wrote:
> OK, I finally figured out to run XFree86-debug with the "-ac" flag from
> the console and connect to the process with gdb --pid=<pid>. When I
> run /usr/lib/xscreensaver/fontglide from another remote shell I get the
> crash with the following output:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x40146fbf in memcpy () from /lib/tls/libc.so.6
> (gdb) bt
> #0 0x40146fbf in memcpy () from /lib/tls/libc.so.6
> #1 0x08c31070 in ?? ()
> #2 0xbffff7e0 in ?? ()
> #3 0x088cfadd in fs_read_list_info (fpe=0x8b566c0, blockrec=0x8c31070)
> at fserve.c:2376
> #4 0x088ce1b4 in fs_read_reply (fpe=0x8b566c0, client=0x0) at fserve.c:1310
> #5 0x088ce2c8 in fs_wakeup (fpe=0x8b566c0, mask=0x8acb3e0) at fserve.c:1349
> #6 0x084b0eb5 in FontWakeup (data=0x0, count=1,
> LastSelectMask=0x8acb3e0) at dixfonts.c:190
> #7 0x0848d67f in WakeupHandler (result=1, pReadmask=0x8acb3e0) at
> dixutils.c:459
> #8 0x084b685f in WaitForSomething (pClientsReady=0xbffff834) at
> WaitFor.c:353
> #9 0x084842bc in Dispatch () at dispatch.c:379
> #10 0x0849b95c in main (argc=2, argv=0xbffffd24, envp=0xbffffd30) at
> main.c:469
Here's the part of fserve.c in question:
2356 buf = (char *) rep + SIZEOF (fsListFontsWithXInfoReply);
2357
2358 /*
2359 * The original FS implementation didn't match
2360 * the spec, version 1 was respecified to match the FS.
2361 * Version 2 matches the original intent
2362 */
2363 if (conn->fsMajorVersion <= 1)
2364 {
2365 memcpy (binfo->name, buf, rep->nameLength);
2366 buf += _fs_pad_length (rep->nameLength);
2367 }
2368 pi = (fsPropInfo *) buf;
2369 buf += SIZEOF (fsPropInfo);
2370 po = (fsPropOffset *) buf;
2371 buf += pi->num_offsets * SIZEOF (fsPropOffset);
2372 pd = (pointer) buf;
2373 buf += pi->data_len;
2374 if (conn->fsMajorVersion > 1)
2375 {
2376 memcpy (binfo->name, buf, rep->nameLength);
2377 buf += _fs_pad_length (rep->nameLength);
2378 }
Help wanted!
--
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