[Intel-gfx] Heap corruption regression in 2.15.0

[Ian Pilcher]

With the recently pushed Fedora 15 update to 2.15.0, I'm getting a hard
X hang every time I log out.  gdb backtrace reveals that glibc is dead-
locking trying to report a heap corruption:

#0  __lll_lock_wait_private () at
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:100
#1  0x00007fb07f8c7c11 in _L_lock_10461 () at malloc.c:6486
#2  0x00007fb07f8c59d7 in __libc_malloc (bytes=140396034138592) at
malloc.c:3657
#3  0x00007fb07f8bb35d in __libc_message (do_abort=2,
    fmt=0x7fb07f9a6fb8 "*** glibc detected *** %s: %s: 0x%s ***\n")
    at ../sysdeps/unix/sysv/linux/libc_fatal.c:137
#4  0x00007fb07f8c196a in malloc_printerr (action=3,
    str=0x7fb07f9a3f92 "corrupted double-linked list", ptr=<optimized
out>) at
malloc.c:6283
#5  0x00007fb07f8c1d48 in malloc_consolidate (av=0x7fb07fbe21e0) at
malloc.c:5161
#6  0x00007fb07f8c2669 in malloc_consolidate (av=0x7fb07fbe21e0) at
malloc.c:5115
#7  _int_free (av=0x7fb07fbe21e0, p=<optimized out>, have_lock=0) at
malloc.c:5034
#8  0x000000351360c01f in FontFileFreeDir (dir=0x1fef3d0) at fontdir.c:166
#9  0x000000351360ce18 in FontFileFreeFPE (fpe=0x1fef360) at fontfile.c:139
#10 0x000000351360f89e in CatalogueUnrefFPEs (fpe=<optimized out>) at
catalogue.c:116
#11 0x000000351360fe41 in CatalogueFreeFPE (fpe=0x1fb8f00) at
catalogue.c:272
#12 0x000000000042f09d in FreeFPE (fpe=0x1fb8f00) at dixfonts.c:218
#13 FreeFPE (fpe=0x1fb8f00) at dixfonts.c:214
#14 0x000000000042f107 in FreeFontPath (list=0x1fb54b0, n=2, force=1) at
dixfonts.c:1628
#15 0x0000000000432257 in FreeFonts () at dixfonts.c:1998
#16 0x0000000000422f1e in main (argc=<optimized out>, argv=0x7fff89fd3fb8,
envp=<optimized out>)
    at main.c:329

This does not happen with the 2.14.0 package (verified by downgrading).

Anyone have any ideas for potential suspect commits?

Thanks!

-- 
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Ian Pilcher                                         arequipeno at gmail.com
"If you're going to shift my paradigm ... at least buy me dinner first."
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