Tested Version:
libextractor v1.6
Tested System:
Linux leon-virtual-machine 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Details:
In function EXTRACTOR_xm_extract_method at xm_extractor.c
73 if (sizeof (struct Header) >
74 ec->read (ec->cls,
75 &data,
76 sizeof (struct Header)))
77 return;
78 head = data;
79 /* Check "magic" id bytes */
80 if (memcmp (head->magicid, "Extended Module: ", 17))
81 return;
82 ADD("audio/x-xm", EXTRACTOR_METATYPE_MIMETYPE);
ec->read function set data to NULL.
Crash Information:
The output with address sanitizer enabled
./extract -i extract.EXTRACTOR_xm_extract_method.xm_extractor.80.crash
Keywords for file extract.EXTRACTOR_xm_extract_method.xm_extractor.80.crash:
ASAN:SIGSEGV
=================================================================
==24253==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f30231c2051 bp 0x7ffc95c6e700 sp 0x7ffc95c6de88 T0)
#0 0x7f30231c2050 (/lib/x86_64-linux-gnu/libc.so.6+0x16f050)
#1 0x7f30236f074e in memcmp (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x7774e)
#2 0x7f301bc86def in EXTRACTOR_xm_extract_method /root/libextractor-1.6/src/plugins/xm_extractor.c:80
#3 0x7f30234399a1 in do_extract /root/libextractor-1.6/src/main/extractor.c:583
#4 0x7f3023439db5 in EXTRACTOR_extract /root/libextractor-1.6/src/main/extractor.c:662
#5 0x4044f9 in main /root/libextractor-1.6/src/main/extract.c:983
#6 0x7f302307382f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#7 0x4017c8 in _start (/opt/asan/bin/extract+0x4017c8)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ??:0 ??
==24253==ABORTING
CREDIT
Zhao Liang, Huawei Weiran Labs
Attachment is POC file
extract.EXTRACTOR_xm_extract_method.xm_extractor.80.crash