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_sid_extract_method at sid_extractor.c
179 if (sizeof (struct header) >
180 ec->read (ec->cls,
181 &data,
182 sizeof (struct header)))
183 return;
184 head = data;
185
186 /* Check "magic" id bytes */
187 if ( (0 != memcmp (head->magicid, "PSID", 4)) &&
188 (0 != memcmp (head->magicid, "RSID", 4)) )
189 return;
190
191 /* Mime-type */
192 ADD ("audio/prs.sid", EXTRACTOR_METATYPE_MIMETYPE);
ec->read function set data to NULL.
Crash Information:
The output with address sanitizer enabled
./extract -i extract.EXTRACTOR_sid_extract_method.sid_extractor.187.crash
Keywords for file extract.EXTRACTOR_sid_extract_method.sid_extractor.187.crash:
ASAN:SIGSEGV
=================================================================
==41155==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f047403cfe4 bp 0x7ffd91e2f930 sp 0x7ffd91e2f0b8 T0)
#0 0x7f047403cfe3 (/lib/x86_64-linux-gnu/libc.so.6+0x16efe3)
#1 0x7f047456b74e in memcmp (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x7774e)
#2 0x7f046c67ef93 in EXTRACTOR_sid_extract_method /root/libextractor-1.6/src/plugins/sid_extractor.c:187
#3 0x7f04742b49a1 in do_extract /root/libextractor-1.6/src/main/extractor.c:583
#4 0x7f04742b4db5 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 0x7f0473eee82f 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 ??
==41155==ABORTING
CREDIT
Zhao Liang, Huawei Weiran Labs
Attachment is POC file
extract.EXTRACTOR_sid_extract_method.sid_extractor.187.crash