Bug#910451: bs1770gain segfaults on MP3 files

[Etienne Dechamps <etienne@edechamps.fr>]

Package: bs1770gain
Version: 0.4.12-3+b1
Severity: important

--- Please enter the report below this line. ---
bs1770gain segfaults when running on most MP3 files. (Other formats,
like FLAC, appear to work fine.)

Steps to reproduce:
$ sox -n sine.wav synth 1 sine 1000
...
$ ffmpeg -i sine.wav sine.mp3
...
$ bs1770gain sine.mp3
analyzing ...
  [1/1] "sine.mp3": Segmentation fault (core dumped)

GDB stacktrace with debug symbols:

analyzing ...
  [1/1] "sine.mp3":
Program received signal SIGSEGV, Segmentation fault.
0x00005555555d08b0 in ?? ()
(gdb) bt
#0  0x00005555555d08b0 in  ()
#1  0x00007ffff7da900e in av_buffer_unref () at
/usr/lib/x86_64-linux-gnu/libavutil.so.56
#2  0x00007ffff6a0d4c5 in av_packet_unref
(pkt=pkt@entry=0x5555555b6300) at src/libavcodec/avpacket.c:595
#3  0x00007ffff6a930f8 in decode_simple_internal
(frame=0x5555555b6480, avctx=0x5555555b4640) at
src/libavcodec/decode.c:377
#4  0x00007ffff6a930f8 in decode_simple_receive_frame
(frame=<optimized out>, avctx=<optimized out>) at
src/libavcodec/decode.c:594
#5  0x00007ffff6a930f8 in decode_receive_frame_internal
(avctx=avctx@entry=0x5555555b4640, frame=frame@entry=0x5555555b6480)
    at src/libavcodec/decode.c:612
#6  0x00007ffff6a95bbb in avcodec_receive_frame (avctx=0x5555555b4640,
frame=0x5555555b6480) at src/libavcodec/decode.c:726
#7  0x00007ffff6a95e7b in compat_decode
(avctx=avctx@entry=0x5555555b4640, frame=frame@entry=0x5555555b6480,
got_frame=got_frame@entry=0x7fffffffd964,
pkt=pkt@entry=0x5555555b39a0) at src/libavcodec/decode.c:782
#8  0x00007ffff6a9624d in avcodec_decode_audio4
(avctx=avctx@entry=0x5555555b4640, frame=frame@entry=0x5555555b6480,
got_frame_ptr=got_frame_ptr@entry=0x7fffffffd964,
avpkt=avpkt@entry=0x5555555b39a0) at src/libavcodec/decode.c:838
#9  0x000055555555d5e2 in frame_reader_run (n=0x5555555b3960) at
ffsox_frame_reader.c:172
#10 0x000055555555db0c in ffsox_machine_run (m=m@entry=0x7fffffffd9d0,
node=<optimized out>, node@entry=0x555555592410)
    at ffsox_machine.c:30
#11 0x000055555555f4be in ffsox_sox_reader_read
(sa=sa@entry=0x555555592410, buf=<optimized out>, len=<optimized out>)
    at ffsox_sox_reader.c:117
#12 0x000055555555f5a2 in drain (e=<optimized out>, obuf=<optimized
out>, osamp=0x7fffffffdac8) at ffsox_sox_read_handler.c:56
#13 0x00007ffff63bd933 in drain_effect (n=0, chain=0x55555558f3e0) at
effects.c:352
#14 0x00007ffff63bd933 in sox_flow_effects
(chain=chain@entry=0x55555558f3e0, callback=callback@entry=
    0x0, client_data=client_data@entry=0x0) at effects.c:445
#15 0x000055555555c704 in ffsox_analyze (ac=ac@entry=0x7fffffffdde0,
ai=<optimized out>, vi=<optimized out>) at ffsox_analyze.c:159
#16 0x000055555555a6ae in bs1770gain_tree_analyze (tree=<optimized
out>, odirname=0x0, options=0x7fffffffdef0) at bs1770gain_tree.c:141
#17 0x000055555555808a in main (argc=<optimized out>,
argv=0x7fffffffe118) at bs1770gain.c:970

--- System information. ---
Architecture:
Kernel:       Linux 4.18.0-1-amd64

Debian Release: buster/sid
  500 unstable-debug  deb.debian.org
  500 unstable        deb.debian.org
  500 stretch         packagecloud.io
  500 stable          www.ubnt.com
    1 experimental-debug deb.debian.org
    1 experimental    deb.debian.org

--- Package information. ---
Depends                   (Version) | Installed
===================================-+-=============
libavcodec58            (>= 7:4.0)  | 7:4.0.2-2
 OR libavcodec-extra58   (>= 7:4.0) |
libavformat58            (>= 7:4.0) | 7:4.0.2-2
libavutil56              (>= 7:4.0) | 7:4.0.2-2
libc6                     (>= 2.14) | 2.27-6
libsox3                (>= 14.4.2~) | 14.4.2-3
libswresample3           (>= 7:4.0) | 7:4.0.2-2


Package's Recommends field is empty.

Package's Suggests field is empty.