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Invalid memory address dereference in lt_prediction(in libfaad/lt_predict.c:108) #31

fantasy7082 opened this Issue Dec 17, 2018 · 0 comments


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fantasy7082 commented Dec 17, 2018

Hi, i found a issue in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. It crashed in function lt_prediction .the details are below(ASAN):

./faad faad_res/010-invalid-def-lt_predict_108 -o out.wav
 *********** Ahead Software MPEG-4 AAC Decoder V2.8.8 ******************

 Build: Dec 13 2018
 Copyright 2002-2004: Ahead Software AG
 bug tracking:
 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/010-invalid-def-lt_predict_108 file info:

 | Config:  1.1 Ch     |
 | Ch |    Position    |
 | 00 | Center front   |
 | 01 | Left front     |

ASAN:SIGSEGV faad_res/010-invalid-def-lt_predict_108.
==7092==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000fd0 (pc 0x7f09d10c9532 bp 0x7ffea06b0460 sp 0x7ffea06ac370 T0)
    #0 0x7f09d10c9531 in lt_prediction /root/faad2_asan/libfaad/lt_predict.c:108
    #1 0x7f09d10fb6b8 in reconstruct_channel_pair /root/faad2_asan/libfaad/specrec.c:1228
    #2 0x7f09d1102823 in channel_pair_element /root/faad2_asan/libfaad/syntax.c:759
    #3 0x7f09d1100cbf in decode_cpe /root/faad2_asan/libfaad/syntax.c:402
    #4 0x7f09d1101398 in raw_data_block /root/faad2_asan/libfaad/syntax.c:448
    #5 0x7f09d10bb9c3 in aac_frame_decode /root/faad2_asan/libfaad/decoder.c:990
    #6 0x7f09d10bb566 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 0x7f09d0cf382f in __libc_start_main (/lib/x86_64-linux-gnu/
    #11 0x401aa8 in _start (/usr/local/faad-asan/bin/faad+0x401aa8)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /root/faad2_asan/libfaad/lt_predict.c:108 lt_prediction


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