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d-)�����n]]E���[W::sam_parse1] empty query name�~I���I�����#��
[W::sam_parse1] unrecognized reference name "c1"; treated as unmapped
[W::sam_parse1] mapped query must have a CIGAR; treated as unmapped
[W::sam_read1_sam] Parse error at line 4
=================================================================
==12672==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x6020000051d8 at pc 0x5620c14796fb bp 0x7fffbd07d7a0 sp 0x7fffbd07d798
READ of size 4 at 0x6020000051d8 thread T0
#0 0x5620c14796fa in body /home/octavio/oss/htslib/md5.c:141:3
#1 0x5620c14793c4 in hts_md5_update /home/octavio/oss/htslib/md5.c:264:10
#2 0x5620c1537cbd in cram_encode_container /home/octavio/oss/htslib/cram/cram_encode.c:2041:17
#3 0x5620c15a796c in cram_flush_container /home/octavio/oss/htslib/cram/cram_io.c:4128:14
#4 0x5620c15a8795 in cram_flush_container_mt /home/octavio/oss/htslib/cram/cram_io.c:4280:16
#5 0x5620c15b3742 in cram_flush /home/octavio/oss/htslib/cram/cram_io.c:5431:19
#6 0x5620c14422e7 in hts_flush /home/octavio/oss/htslib/hts.c:1667:16
#7 0x5620c13bb084 in vprint_error_core /home/octavio/oss/samtools/sam_utils.c:48:26
#8 0x5620c13bb45c in print_error_errno /home/octavio/oss/samtools/sam_utils.c:71:5
#9 0x5620c11c4472 in stream_view /home/octavio/oss/samtools/sam_view.c:762:9
#10 0x5620c11bfbe8 in main_samview /home/octavio/oss/samtools/sam_view.c:1363:15
#11 0x5620c123eeed in main /home/octavio/oss/samtools/bamtk.c:244:55
#12 0x7f6ffe829d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#13 0x7f6ffe829e3f in __libc_start_main csu/../csu/libc-start.c:392:3
#14 0x5620c10e3b24 in _start (/home/octavio/oss/samtools/samtools+0xb0b24) (BuildId: 7078ea94d4e08689f85e1df47e2d609c021d2440)
0x6020000051d9 is located 0 bytes to the right of 9-byte region [0x6020000051d0,0x6020000051d9)
allocated by thread T0 here:
#0 0x5620c116696e in malloc (/home/octavio/oss/samtools/samtools+0x13396e) (BuildId: 7078ea94d4e08689f85e1df47e2d609c021d2440)
#1 0x5620c1599237 in load_ref_portion /home/octavio/oss/htslib/cram/cram_io.c:3254:29
#2 0x5620c15988ca in cram_ref_load /home/octavio/oss/htslib/cram/cram_io.c:3360:17
#3 0x5620c159a526 in cram_get_ref /home/octavio/oss/htslib/cram/cram_io.c:3510:27
#4 0x5620c15ad639 in cram_write_SAM_hdr /home/octavio/oss/htslib/cram/cram_io.c:4913:23
#5 0x5620c14a3a10 in sam_hdr_write /home/octavio/oss/htslib/sam.c:2206:13
#6 0x5620c11bdf8a in main_samview /home/octavio/oss/samtools/sam_view.c:1250:17
#7 0x5620c123eeed in main /home/octavio/oss/samtools/bamtk.c:244:55
#8 0x7f6ffe829d8f in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/octavio/oss/htslib/md5.c:141:3 in body
Shadow bytes around the buggy address:
0x0c047fff89e0: fa fa fd fa fa fa fd fa fa fa fd fd fa fa 00 fa
0x0c047fff89f0: fa fa 04 fa fa fa 03 fa fa fa 00 07 fa fa 00 00
0x0c047fff8a00: fa fa 04 fa fa fa 00 00 fa fa 00 00 fa fa 04 fa
0x0c047fff8a10: fa fa 00 00 fa fa 00 00 fa fa 04 fa fa fa 00 00
0x0c047fff8a20: fa fa 00 00 fa fa fd fd fa fa 00 00 fa fa fd fa
=>0x0c047fff8a30: fa fa fd fd fa fa 00 fa fa fa 00[01]fa fa fd fa
0x0c047fff8a40: fa fa fd fa fa fa fd fd fa fa fd fa fa fa fd fa
0x0c047fff8a50: fa fa fd fa fa fa fd fd fa fa fd fa fa fa fd fa
0x0c047fff8a60: fa fa fd fd fa fa fd fd fa fa fd fa fa fa fd fd
0x0c047fff8a70: fa fa fd fa fa fa fd fd fa fa fd fa fa fa fd fd
0x0c047fff8a80: fa fa fd fd fa fa fd fa fa fa fd fa fa fa fd 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
==12672==ABORTING
Summary
Heap-buffer overflow in
hts_md5_update
during parsing of a crafted SAM/FASTA file pair.Environment
Built using LLVM 14 with ASAN on Ubuntu 22.04
How to reproduce
Build with ASAN on latest commit like so:
Within the samtools folder, get poc file and reproduce with:
Which on my setup outputs:
Note that this may be related to https://github.com/samtools/htslib/issues/1693 . However, both the allocation site and the function in which the faulty access occur are different.