Heap-buffer-overflow in cairo_cff_parse_charstring
=================================================================
==35576==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x625000015a05 at pc 0x000001292fa5 bp 0x7ffd2d0d80f0 sp 0x7ffd2d0d80e8
READ of size 1 at 0x625000015a05 thread T0
#0 0x1292fa4 in cairo_cff_parse_charstring /src/cairo/_builddir/../src/cairo-cff-subset.c:1519:13
#1 0x1292500 in cairo_cff_parse_charstring /src/cairo/_builddir/../src/cairo-cff-subset.c
#2 0x1290ee2 in cairo_cff_find_width_and_subroutines_used /src/cairo/_builddir/../src/cairo-cff-subset.c:1689:14
#3 0x128ec80 in cairo_cff_font_subset_charstrings_and_subroutines /src/cairo/_builddir/../src/cairo-cff-subset.c:1806:15
#4 0x1289feb in cairo_cff_font_subset_font /src/cairo/_builddir/../src/cairo-cff-subset.c:1987:14
#5 0x128515e in cairo_cff_font_generate /src/cairo/_builddir/../src/cairo-cff-subset.c:2600:14
#6 0x128404a in _cairo_cff_subset_init /src/cairo/_builddir/../src/cairo-cff-subset.c:2977:14
#7 0x11b91dc in _cairo_pdf_surface_emit_cff_font_subset /src/cairo/_builddir/../src/cairo-pdf-surface.c:5939:14
#8 0x11b8a22 in _cairo_pdf_surface_emit_unscaled_font_subset /src/cairo/_builddir/../src/cairo-pdf-surface.c:6654:14
#9 0x129e2e4 in _cairo_sub_font_collect /src/cairo/_builddir/../src/cairo-scaled-font-subsets.c:742:30
#10 0x129af2a in _cairo_scaled_font_subsets_foreach_internal /src/cairo/_builddir/../src/cairo-scaled-font-subsets.c:1064:6
#11 0x129b242 in _cairo_scaled_font_subsets_foreach_unscaled /src/cairo/_builddir/../src/cairo-scaled-font-subsets.c:1092:12
#12 0x11a18a0 in _cairo_pdf_surface_emit_font_subsets /src/cairo/_builddir/../src/cairo-pdf-surface.c:6704:14
#13 0x119c065 in _cairo_pdf_surface_finish /src/cairo/_builddir/../src/cairo-pdf-surface.c:2486:11
#14 0x1169d68 in _cairo_surface_finish /src/cairo/_builddir/../src/cairo-surface.c:1030:11
#15 0x1168fb9 in cairo_surface_finish /src/cairo/_builddir/../src/cairo-surface.c:1079:5
#16 0x122e932 in _cairo_paginated_surface_finish /src/cairo/_builddir/../src/cairo-paginated-surface.c:214:2
#17 0x1169d68 in _cairo_surface_finish /src/cairo/_builddir/../src/cairo-surface.c:1030:11
#18 0x1166a45 in cairo_surface_destroy /src/cairo/_builddir/../src/cairo-surface.c:970:2
#19 0x5ec536 in LLVMFuzzerTestOneInput /src/poppler/glib/tests/fuzzing/pdf_draw_fuzzer.cc:70:5
#20 0x4f22d3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:599:15
#21 0x4dda42 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:323:6
#22 0x4e36e6 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:856:9
#23 0x50cbf2 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10
#24 0x7f57ed443b26 in __libc_start_main (/lib64/libc.so.6+0x25b26)
#25 0x4b98f9 in _start (/out/pdf_draw_fuzzer+0x4b98f9)
Address 0x625000015a05 is a wild pointer.
SUMMARY: AddressSanitizer: heap-buffer-overflow /src/cairo/_builddir/../src/cairo-cff-subset.c:1519:13 in cairo_cff_parse_charstring
Shadow bytes around the buggy address:
0x0c4a7fffaaf0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c4a7fffab40:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab80: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c4a7fffab90: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==35576==ABORTING