Closed
Description
Hi, i found a null pointer dereference bug in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. It crashed in function ifilter_bank.the details are below(ASAN):
./faad faad_res/004-null-point-filtbank_223 -o out.wav
*********** Ahead Software MPEG-4 AAC Decoder V2.8.8 ******************
Build: Dec 13 2018
Copyright 2002-2004: Ahead Software AG
http://www.audiocoding.com
bug tracking: https://sourceforge.net/p/faac/bugs/
Floating point version
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License.
**************************************************************************
faad_res/004-null-point-filtbank_223 file info:
ADTS, 0.043 sec, 37 kbps, 48000 Hz
---------------------
| Config: 43 Ch |
---------------------
| Ch | Position |
---------------------
| 00 | Left front |
| 01 | Right front |
| 02 | Unknown |
| 03 | Unknown |
| 04 | Unknown |
| 05 | Unknown |
| 06 | Unknown |
| 07 | Unknown |
| 08 | Unknown |
| 09 | Unknown |
| 10 | Unknown |
| 11 | Unknown |
| 12 | Unknown |
| 13 | Unknown |
| 14 | Unknown |
| 15 | Unknown |
| 16 | Unknown |
| 17 | Unknown |
| 18 | Unknown |
| 19 | Unknown |
| 20 | Unknown |
| 21 | Unknown |
| 22 | Unknown |
| 23 | Unknown |
| 24 | Unknown |
| 25 | Unknown |
| 26 | Unknown |
| 27 | Unknown |
| 28 | Unknown |
| 29 | Unknown |
| 30 | Unknown |
| 31 | Unknown |
| 32 | Unknown |
| 33 | Unknown |
| 34 | Unknown |
| 35 | Unknown |
| 36 | Unknown |
| 37 | Unknown |
| 38 | Unknown |
| 39 | Unknown |
| 40 | Unknown |
| 41 | Unknown |
| 42 | Unknown |
---------------------
ASAN:SIGSEGVfaad_res/004-null-point-filtbank_223.
=================================================================
==7068==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x7f82e567eeeb bp 0x7ffe62c6dc40 sp 0x7ffe62c6bb50 T0)
#0 0x7f82e567eeea in ifilter_bank /root/faad2_asan/libfaad/filtbank.c:223
#1 0x7f82e56b7d3e in reconstruct_single_channel /root/faad2_asan/libfaad/specrec.c:1014
#2 0x7f82e56c0e28 in single_lfe_channel_element /root/faad2_asan/libfaad/syntax.c:631
#3 0x7f82e56bf354 in decode_sce_lfe /root/faad2_asan/libfaad/syntax.c:351
#4 0x7f82e56c02da in raw_data_block /root/faad2_asan/libfaad/syntax.c:441
#5 0x7f82e567a9c3 in aac_frame_decode /root/faad2_asan/libfaad/decoder.c:990
#6 0x7f82e567a566 in NeAACDecDecode /root/faad2_asan/libfaad/decoder.c:821
#7 0x40f8ae in decodeAACfile /root/faad2_asan/frontend/main.c:679
#8 0x411dd4 in faad_main /root/faad2_asan/frontend/main.c:1323
#9 0x411fe5 in main /root/faad2_asan/frontend/main.c:1366
#10 0x7f82e52b282f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#11 0x401aa8 in _start (/usr/local/faad-asan/bin/faad+0x401aa8)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /root/faad2_asan/libfaad/filtbank.c:223 ifilter_bank
==7068==ABORTING
POC FILE:https://github.com/fantasy7082/image_test/blob/master/004-null-point-filtbank_223
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