There's an overlapping memory bug in latest upstream FreeType2, reproducible on a 64-bit Ubuntu system, the ftbench utility built with AddressSanitizer (https://code.google.com/p/address-sanitizer/wiki/AddressSanitizer) and the two attached malformed font files.

AddressSanitizer report:

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==30611== ERROR: AddressSanitizer: memcpy-param-overlap: memory ranges [0x7f3ef9692840,0x7f3ef9692b8c) and [0x7f3ef96928f4, 0x7f3ef9692c40) overlap
    #0 0x9e6076 in memcpy ??:0
    #1 0x74972f in _bdf_readstream freetype2/src/bdf/bdflib.c:757
    #2 0x73fe90 in bdf_load_font freetype2/src/bdf/bdflib.c:2387
    #3 0x733852 in BDF_Face_Init freetype2/src/bdf/bdfdrivr.c:367
    #4 0x44d375 in open_face freetype2/src/base/ftobjs.c:1154
    #5 0x4490c1 in FT_Open_Face freetype2/src/base/ftobjs.c:2082
    #6 0x44736f in FT_New_Face freetype2/src/base/ftobjs.c:1216
    #7 0x414e46 in get_face ft2demos-2.4.10/src/ftbench.c:624
    #8 0x417162 in main ft2demos-2.4.10/src/ftbench.c:752
    #9 0x7f3ef973a76c in __libc_start_main /build/buildd/eglibc-2.15/csu/libc-start.c:226
0x7f3ef9692840 is located 0 bytes inside of 1024-byte region [0x7f3ef9692840,0x7f3ef9692c40)
allocated by thread T0 here:
    #0 0x9e9680 in malloc ??:0
    #1 0x9d38a9 in ft_alloc freetype2/builds/unix/ftsystem.c:102
    #2 0x4a3eb4 in ft_mem_qalloc freetype2/src/base/ftutil.c:76
    #3 0x43125a in ft_mem_alloc freetype2/src/base/ftutil.c:55
    #4 0x4b2685 in ft_mem_qrealloc freetype2/src/base/ftutil.c:146
    #5 0x433599 in ft_mem_realloc freetype2/src/base/ftutil.c:102
    #6 0x748247 in _bdf_readstream freetype2/src/bdf/bdflib.c:685
    #7 0x73fe90 in bdf_load_font freetype2/src/bdf/bdflib.c:2387
    #8 0x733852 in BDF_Face_Init freetype2/src/bdf/bdfdrivr.c:367
    #9 0x44d375 in open_face freetype2/src/base/ftobjs.c:1154
0x7f3ef96928f4 is located 180 bytes inside of 1024-byte region [0x7f3ef9692840,0x7f3ef9692c40)
allocated by thread T0 here:
    #0 0x9e9680 in malloc ??:0
    #1 0x9d38a9 in ft_alloc freetype2/builds/unix/ftsystem.c:102
    #2 0x4a3eb4 in ft_mem_qalloc freetype2/src/base/ftutil.c:76
    #3 0x43125a in ft_mem_alloc freetype2/src/base/ftutil.c:55
    #4 0x4b2685 in ft_mem_qrealloc freetype2/src/base/ftutil.c:146
    #5 0x433599 in ft_mem_realloc freetype2/src/base/ftutil.c:102
    #6 0x748247 in _bdf_readstream freetype2/src/bdf/bdflib.c:685
    #7 0x73fe90 in bdf_load_font freetype2/src/bdf/bdflib.c:2387
    #8 0x733852 in BDF_Face_Init freetype2/src/bdf/bdfdrivr.c:367
    #9 0x44d375 in open_face freetype2/src/base/ftobjs.c:1154
Stats: 0M malloced (0M for red zones) by 579 calls
Stats: 0M realloced by 6 calls
Stats: 0M freed by 27 calls
Stats: 0M really freed by 0 calls
Stats: 6M (1542 full pages) mmaped in 11 calls
  mmaps   by size class: 7:4095; 8:2047; 9:1023; 10:511; 11:255; 12:128; 13:64; 14:32; 15:16; 19:1; 20:1;
  mallocs by size class: 7:523; 8:28; 9:6; 10:9; 11:7; 12:1; 13:1; 14:1; 15:1; 19:1; 20:1;
  frees   by size class: 7:3; 8:10; 9:2; 10:8; 11:3; 13:1;
  rfrees  by size class:
Stats: malloc large: 3 small slow: 10
==30611== ABORTING
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