Daniel Kang <[email protected]> added the comment:
Here is the backtrace with a breakpoint on libavformat/utils.c:955:
(gdb) break libavformat/utils.c:955
Breakpoint 1 at 0x4d36b0: file libavformat/utils.c, line 955.
(gdb) r -i ../fuzzed/wav_invalid_sample_rate_small.wav del.wav
Starting program: ffmpeg/ffmpeg_g -i ../fuzzed/wav_invalid_sample_rate_small.wav
del.wav
[Thread debugging using libthread_db enabled]
FFmpeg version git-0a30723, Copyright (c) 2000-2011 the FFmpeg developers
built on Jan 1 2011 23:48:54 with gcc 4.4.5
configuration: --enable-gpl
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 0 / 0.16. 0
libavcodec 52.101. 0 / 52.101. 0
libavformat 52.91. 0 / 52.91. 0
libavdevice 52. 2. 2 / 52. 2. 2
libavfilter 1.72. 0 / 1.72. 0
libswscale 0.12. 0 / 0.12. 0
st:0 has too large timebase, reducing
Breakpoint 1, compute_pkt_fields (s=0x11f9510, st=0x11fa5f0, pc=0x0,
pkt=0x7fffffffd560) at libavformat/utils.c:955
955 pkt->duration = av_rescale_rnd(1, num *
(int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN);
(gdb) bt
#0 compute_pkt_fields (s=0x11f9510, st=0x11fa5f0, pc=0x0, pkt=0x7fffffffd560)
at libavformat/utils.c:955
#1 0x00000000004d3f06 in av_read_frame_internal (s=0x11f9510,
pkt=0x7fffffffd560) at libavformat/utils.c:1087
#2 0x00000000004d4c65 in av_find_stream_info (ic=0x11f9510) at
libavformat/utils.c:2287
#3 0x00000000004301db in opt_input_file (filename=0x7fffffffdc9f
"../fuzzed/wav_invalid_sample_rate_small.wav") at ffmpeg.c:3211
#4 0x000000000043a70c in parse_options (argc=4, argv=0x7fffffffd928,
options=<value optimized out>, parse_arg_function=0x437260 <opt_output_file>) at
cmdutils.c:204
#5 0x00000000004363a2 in main (argc=4, argv=0x7fffffffd928) at ffmpeg.c:4330
(gdb) disass $pc-32 $pc+32
Dump of assembler code from 0x4d3690 to 0x4d36d0:
0x00000000004d3690 <compute_pkt_fields+1536>: lock add (%rax),%eax
0x00000000004d3693 <compute_pkt_fields+1539>: add %al,(%rcx)
0x00000000004d3695 <compute_pkt_fields+1541>: jg 0x4d3136
<compute_pkt_fields+166>
0x00000000004d369b <compute_pkt_fields+1547>: nopl 0x0(%rax,%rax,1)
0x00000000004d36a0 <compute_pkt_fields+1552>: test %edx,%edx
0x00000000004d36a2 <compute_pkt_fields+1554>: je 0x4d3136
<compute_pkt_fields+166>
0x00000000004d36a8 <compute_pkt_fields+1560>: test %eax,%eax
0x00000000004d36aa <compute_pkt_fields+1562>: je 0x4d3136
<compute_pkt_fields+166>
0x00000000004d36b0 <compute_pkt_fields+1568>: movslq 0x40(%rbp),%rcx
0x00000000004d36b4 <compute_pkt_fields+1572>: movslq %eax,%rsi
0x00000000004d36b7 <compute_pkt_fields+1575>: movslq 0x44(%rbp),%rax
0x00000000004d36bb <compute_pkt_fields+1579>: movslq %edx,%rdx
0x00000000004d36be <compute_pkt_fields+1582>: mov $0x1,%edi
0x00000000004d36c3 <compute_pkt_fields+1587>: mov %r8b,0x8(%rsp)
0x00000000004d36c8 <compute_pkt_fields+1592>: mov %r9d,0x10(%rsp)
0x00000000004d36cd <compute_pkt_fields+1597>: imul %rcx,%rdx
End of assembler dump.
(gdb) info all-registers
rax 0x3f9 1017
rbx 0x7fffffffd560 140737488344416
rcx 0x20 32
rdx 0x80005622 2147505698
rsi 0x11fa5f0 18851312
rdi 0x10000 65536
rbp 0x11fa5f0 0x11fa5f0
rsp 0x7fffffffd1d0 0x7fffffffd1d0
r8 0x0 0
r9 0x0 0
r10 0x0 0
r11 0xfe0 4064
r12 0x0 0
r13 0x11fbee0 18857696
r14 0x0 0
r15 0x11f9510 18846992
rip 0x4d36b0 0x4d36b0 <compute_pkt_fields+1568>
eflags 0x206 [ PF IF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
st0 0 (raw 0x00000000000000000000)
st1 0 (raw 0x00000000000000000000)
st2 0 (raw 0x00000000000000000000)
st3 0 (raw 0x00000000000000000000)
st4 0 (raw 0x00000000000000000000)
st5 0 (raw 0x00000000000000000000)
st6 0 (raw 0x00000000000000000000)
st7 0 (raw 0x00000000000000000000)
fctrl 0x37f 895
fstat 0x0 0
ftag 0xffff 65535
fiseg 0x0 0
fioff 0x0 0
foseg 0x0 0
fooff 0x0 0
fop 0x0 0
xmm0 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0},
v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 =
0x00000000000000000000000000000000}
xmm1 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x25 <repeats 16 times>}, v8_int16 = {0x2525, 0x2525, 0x2525,
0x2525, 0x2525,
---Type <return> to continue, or q <return> to quit---
0x2525, 0x2525, 0x2525}, v4_int32 = {0x25252525, 0x25252525, 0x25252525,
0x25252525}, v2_int64 = {0x2525252525252525, 0x2525252525252525},
uint128 = 0x25252525252525252525252525252525}
xmm2 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0},
v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 =
0x00000000000000000000000000000000}
xmm3 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double =
{0x8000000000000000, 0x0}, v16_int8 = {0x0, 0x0, 0xff, 0x0, 0x0, 0x0, 0x0, 0xff,
0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0}, v8_int16 = {0x0, 0xff, 0x0, 0xff00, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0xff0000, 0xff000000, 0x0, 0x0}, v2_int64 = {0xff00000000ff0000,
0x0},
uint128 = 0x0000000000000000ff00000000ff0000}
xmm4 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0,
0x8000000000000000}, v16_int8 = {0x73, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x54,
0x72, 0x69, 0x65,
0x64, 0x20, 0x74, 0x6f}, v8_int16 = {0x73, 0x0, 0x0, 0x0, 0x7254, 0x6569,
0x2064, 0x6f74}, v4_int32 = {0x73, 0x0, 0x65697254, 0x6f742064}, v2_int64 =
{0x73,
0x6f74206465697254}, uint128 = 0x6f742064656972540000000000000073}
xmm5 {v4_float = {0x0, 0x1, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0, 0x0, 0x0, 0xe0, 0x95, 0x9c, 0xe7, 0x3f, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v8_int16 = {0x0, 0xe000, 0x9c95, 0x3fe7, 0x0, 0x0, 0x0, 0x0}, v4_int32
= {0xe0000000, 0x3fe79c95, 0x0, 0x0}, v2_int64 = {0x3fe79c95e0000000, 0x0},
uint128 = 0x00000000000000003fe79c95e0000000}
xmm6 {v4_float = {0x0, 0x1, 0x0, 0x0}, v2_double = {0x1, 0x0},
v16_int8 = {0x6d, 0x7d, 0xbf, 0xbb, 0x27, 0xaf, 0xf5, 0x3f, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0x7d6d, 0xbbbf, 0xaf27, 0x3ff5, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0xbbbf7d6d, 0x3ff5af27, 0x0, 0x0}, v2_int64 = {0x3ff5af27bbbf7d6d,
0x0},
uint128 = 0x00000000000000003ff5af27bbbf7d6d}
xmm7 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0, 0x0, 0x0, 0x0, 0x68, 0xc8, 0xbc, 0x3b, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0}, v8_int16 = {0x0, 0x0, 0xc868, 0x3bbc, 0x0, 0x0, 0x0, 0x0}, v4_int32 =
{0x0, 0x3bbcc868, 0x0, 0x0}, v2_int64 = {0x3bbcc86800000000, 0x0},
uint128 = 0x00000000000000003bbcc86800000000}
xmm8 {v4_float = {0x0, 0xfffffffd, 0x0, 0x0}, v2_double =
{0xffffffffffffffd2, 0x0}, v16_int8 = {0xe0, 0xe6, 0x35, 0x67, 0x9e, 0x6, 0x47,
0xc0, 0x0, 0x0,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v8_int16 = {0xe6e0, 0x6735, 0x69e, 0xc047,
0x0, 0x0, 0x0, 0x0}, v4_int32 = {0x6735e6e0, 0xc047069e, 0x0, 0x0}, v2_int64 = {
0xc047069e6735e6e0, 0x0}, uint128 = 0x0000000000000000c047069e6735e6e0}
xmm9 {v4_float = {0x0, 0x1, 0x0, 0x0}, v2_double = {0x1, 0x0},
v16_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf0, 0x3f, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0}, v8_int16 = {0x0, 0x0, 0x0, 0x3ff0, 0x0, 0x0, 0x0, 0x0}, v4_int32 =
{0x0, 0x3ff00000, 0x0, 0x0}, v2_int64 = {0x3ff0000000000000, 0x0},
uint128 = 0x00000000000000003ff0000000000000}
xmm10 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0, 0x0, 0x46, 0x84, 0x24, 0x59, 0xd6, 0x3e, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0}, v8_int16 = {0x0, 0x8446, 0x5924, 0x3ed6, 0x0, 0x0, 0x0, 0x0}, v4_int32
= {0x84460000, 0x3ed65924, 0x0, 0x0}, v2_int64 = {0x3ed6592484460000, 0x0},
uint128 = 0x00000000000000003ed6592484460000}
xmm11 {v4_float = {0x9689a800, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x6a, 0xa2, 0x65, 0x50, 0xf2, 0xea, 0x8f, 0xbd, 0x0, 0x0, 0x0, 0x0,
0x0,
0x0, 0x0, 0x0}, v8_int16 = {0xa26a, 0x5065, 0xeaf2, 0xbd8f, 0x0, 0x0, 0x0,
0x0}, v4_int32 = {0x5065a26a, 0xbd8feaf2, 0x0, 0x0}, v2_int64 =
{0xbd8feaf25065a26a,
0x0}, uint128 = 0x0000000000000000bd8feaf25065a26a}
xmm12 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x29, 0xf2, 0x88, 0x6c, 0xa6, 0x49, 0xde, 0x3e, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0xf229, 0x6c88, 0x49a6, 0x3ede, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0x6c88f229, 0x3ede49a6, 0x0, 0x0}, v2_int64 = {0x3ede49a66c88f229,
0x0},
uint128 = 0x00000000000000003ede49a66c88f229}
xmm13 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0xb3, 0x12, 0x58, 0x17, 0x64, 0x46, 0xe6, 0x3b, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0x12b3, 0x1758, 0x4664, 0x3be6, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0x175812b3, 0x3be64664, 0x0, 0x0}, v2_int64 = {0x3be64664175812b3,
0x0},
uint128 = 0x00000000000000003be64664175812b3}
xmm14 {v4_float = {0x0, 0x3, 0x0, 0x0}, v2_double = {0x2d, 0x0},
v16_int8 = {0xc0, 0x9, 0xf2, 0x16, 0xb5, 0xdf, 0x46, 0x40, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0,
0x0, 0x0}, v8_int16 = {0x9c0, 0x16f2, 0xdfb5, 0x4046, 0x0, 0x0, 0x0, 0x0},
v4_int32 = {0x16f209c0, 0x4046dfb5, 0x0, 0x0}, v2_int64 = {0x4046dfb516f209c0,
0x0},
uint128 = 0x00000000000000004046dfb516f209c0}
xmm15 {v4_float = {0x0, 0x0, 0x0, 0x0}, v2_double = {0x0, 0x0},
v16_int8 = {0x0 <repeats 16 times>}, v8_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0},
v4_int32 = {0x0, 0x0, 0x0, 0x0}, v2_int64 = {0x0, 0x0}, uint128 =
0x00000000000000000000000000000000}
mxcsr 0x1fa0 [ PE IM DM ZM OM UM PM ]
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FFmpeg issue tracker <[email protected]>
<https://roundup.ffmpeg.org/issue2475>
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