==16545==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60200000001f at pc 0x0000005464c6 bp 0x7ffe90e1b080 sp 0x7ffe90e1b078
READ of size 1 at 0x60200000001f thread T0
#0 0x5464c5 in md_is_named_entity_contents /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:1311:28
#1 0x5464c5 in md_is_entity_str /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:1341
#2 0x553b62 in md_build_attribute /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:1473:20
#3 0x5562f9 in md_enter_leave_span_a /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:3838:5
#4 0x5510d2 in md_process_inlines /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:3947:21
#5 0x5510d2 in md_process_normal_block_contents /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:4284
#6 0x52e7f7 in md_process_leaf_block /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:4454:13
#7 0x52e7f7 in md_process_all_blocks /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:4529
#8 0x52e7f7 in md_process_doc /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:5856
#9 0x5202cb in md_parse /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:5917:11
#10 0x51a7a8 in md_render_html /home/ubuntu/fuzz/test/md4c/md2html/render_html.c:488:12
#11 0x5195cc in process_file /home/ubuntu/fuzz/test/md4c/md2html/md2html.c:139:11
#12 0x5195cc in main /home/ubuntu/fuzz/test/md4c/md2html/md2html.c:343
#13 0x7fd6be7ec82f in __libc_start_main /build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:291
#14 0x41a668 in _start (/home/ubuntu/fuzz/test/md4c/build/md2html/md2html+0x41a668)
0x60200000001f is located 0 bytes to the right of 15-byte region [0x602000000010,0x60200000001f)
allocated by thread T0 here:
#0 0x4de898 in __interceptor_malloc /home/ubuntu/llvm/llvm-6.0.0.src/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:88
#1 0x54bedb in md_merge_lines_alloc /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:904:22
#2 0x54bedb in md_is_inline_link_spec_helper /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:2352
#3 0x53b9bf in md_is_inline_link_spec /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:2370:12
#4 0x53b9bf in md_resolve_links /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:3367
#5 0x53b9bf in md_analyze_inlines /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:3786
#6 0x550b75 in md_process_normal_block_contents /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:4283:5
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/ubuntu/fuzz/test/md4c/md4c/md4c.c:1311:28 in md_is_named_entity_contents
Shadow bytes around the buggy address:
0x0c047fff7fb0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fc0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fd0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7fe0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c047fff7ff0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c047fff8000: fa fa 00[07]fa fa 00 07 fa fa fa fa fa fa fa fa
0x0c047fff8010: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8020: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8030: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8040: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c047fff8050: 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
==16545==ABORTING
The text was updated successfully, but these errors were encountered:
command: ./md2html testfile
testcase: https://github.com/ChijinZ/security_advisories/blob/master/md4c-387bd02/crash_md_is_named_entity_contents
AddressSanitizer provided information as below:
The text was updated successfully, but these errors were encountered: