Crash with fontconfig-2.3.91.cvs20051017-1

[John Ellson]

Tim Murphy wrote:
> Hi,
>
> After installing fontconfig-2.3.91.cvs20051017-1.i386, gdm would start but
> then crash before displaying anything. Eventually I managed to get X to
> startup with xinit and tried to run metacity. Metacity crashed and I then
> tried it under valgrind. I have appended the output but basically there
> seemed to be a problem in fontconfig relating to permissions to some mmapp'd
> memory area.
>
> I downgraded to fontconfig-2.3.2-1 and the problem "went away."
>
> I can't be sure if this is a fontconfig problem or some setup problem - has
> anyone else experienced it?
>
>
> Regards,
>
> Tim
>
> ==23609== Invalid read of size 4
> ==23609== at 0x1BCEC823: FcStrListCreate (in
> /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE3661: FcLangSetHasLang (in
> /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE56FB: (within /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE5B3F: (within /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE5F7F: (within /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE686C: FcFontSetSort (in /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE6D72: FcFontSort (in /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x4C91688D: (within /usr/lib/libpangoft2-1.0.so.0.1001.0)
> ==23609== by 0x4C94C0AE: pango_font_map_load_fontset (in /usr/lib/libpango-
> 1.0.so.0.1001.0)
> ==23609== by 0x4C94ACBA: pango_context_get_metrics (in /usr/lib/libpango-
> 1.0.so.0.1001.0)
> ==23609== by 0x807D261: ??? (theme.c:5180)
> ==23609== by 0x805F196: ??? (frames.c:503)
> ==23609== Address 0x6D616E20 is not stack'd, malloc'd or (recently) free'd
> ==23609==
> ==23609== Process terminating with default action of signal 11 (SIGSEGV)
> ==23609== Bad permissions for mapped region at address 0x6D616E20
> ==23609== at 0x1BCEC823: FcStrListCreate (in
> /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE3661: FcLangSetHasLang (in
> /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE56FB: (within /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE5B3F: (within /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE5F7F: (within /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE686C: FcFontSetSort (in /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x1BCE6D72: FcFontSort (in /usr/lib/libfontconfig.so.1.0.4)
> ==23609== by 0x4C91688D: (within /usr/lib/libpangoft2-1.0.so.0.1001.0)
> ==23609== by 0x4C94C0AE: pango_font_map_load_fontset (in /usr/lib/libpango-
> 1.0.so.0.1001.0)
> ==23609== by 0x4C94ACBA: pango_context_get_metrics (in /usr/lib/libpango-
> 1.0.so.0.1001.0)
> ==23609== by 0x807D261: ??? (theme.c:5180)
> ==23609== by 0x805F196: ??? (frames.c:503)
> ==23609==
> ==23609== ERROR SUMMARY: 94 errors from 3 contexts (suppressed: 64 from 3)
> ==23609== malloc/free: in use at exit: 337686 bytes in 6999 blocks.
> ==23609== malloc/free: 28615 allocs, 21616 frees, 2031211 bytes allocated.
> ==23609== For counts of detected errors, rerun with: -v
> ==23609== searching for pointers to 6999 not-freed blocks.
> ==23609== checked 792564 bytes.
> ==23609==
> ==23609== LEAK SUMMARY:
> ==23609== definitely lost: 56 bytes in 2 blocks.
> ==23609== possibly lost: 1084 bytes in 29 blocks.
> ==23609== still reachable: 336546 bytes in 6968 blocks.
> ==23609== suppressed: 0 bytes in 0 blocks.
> ==23609== Use --leak-check=full to see details of leaked memory.
>
>   
I was having a problem with firefox crashes that were also "fixed" by 
downgrading to fontconfig-2.3.2-1, but then the next day after logging 
out and back in (and possibly also rebooting) I re-upgraded to 
fontconfig-2.3.91.cvs20051017-1 and the problem had gone away.

I suspect some kind of font cache issue during upgrades.

I reported the problem in bug#171224, but later closed it again as I can no longer recreate it.

John