[FFmpeg-trac] #4914(avformat:new): Segmentation fault creating MXF transcoded from mp2
FFmpeg
trac at avcodec.org
Wed Oct 7 14:06:21 CEST 2015
#4914: Segmentation fault creating MXF transcoded from mp2
------------------------------------+------------------------------------
Reporter: wim_arbor | Owner:
Type: defect | Status: new
Priority: important | Component: avformat
Version: git-master | Resolution:
Keywords: mxf | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
------------------------------------+------------------------------------
Comment (by wim_arbor):
rebuild ffmpeg using {{{--disable-optimizations}}}
gdb output:
{{{
No more output streams to write to, finishing.
[mxf @ 0x2106480] out st:1 dts:0
[mxf @ 0x2106480] essence container count:2
Last message repeated 1 times
[mxf @ 0x2106480] package type:1
[mxf @ 0x2106480] package type:2
[mxf @ 0x2106480] -d10_channelcount requires MXF D-10 and will be ignored
Last message repeated 7 times
Program received signal SIGSEGV, Segmentation fault.
0x00000000006b87fe in mxf_write_packet (s=0x2106480, pkt=0x7fffffffe1b0)
at libavformat/mxfenc.c:2456
2456 mxf->body_offset -
mxf->index_entries[mxf->edit_units_count-1].offset;
(gdb) bt
#0 0x00000000006b87fe in mxf_write_packet (s=0x2106480,
pkt=0x7fffffffe1b0) at libavformat/mxfenc.c:2456
#1 0x00000000006a6d3f in write_packet (s=0x2106480, pkt=0x7fffffffe1b0)
at libavformat/mux.c:660
#2 0x00000000006a7fd3 in av_write_trailer (s=0x2106480) at
libavformat/mux.c:998
#3 0x000000000042b2e1 in transcode () at ffmpeg.c:4008
#4 0x000000000042b6e9 in main (argc=38, argv=0x7fffffffe3e8) at
ffmpeg.c:4157
(gdb) disass $pc-32,$pc+32
Dump of assembler code from 0x6b87de to 0x6b881e:
0x00000000006b87de <mxf_write_packet+1235>: mov 0x20(%rax),%rdi
0x00000000006b87e2 <mxf_write_packet+1239>: mov -0x18(%rbp),%rax
0x00000000006b87e6 <mxf_write_packet+1243>: mov 0x28(%rax),%eax
0x00000000006b87e9 <mxf_write_packet+1246>: sub $0x1,%eax
0x00000000006b87ec <mxf_write_packet+1249>: mov %eax,%edx
0x00000000006b87ee <mxf_write_packet+1251>: mov %rdx,%rax
0x00000000006b87f1 <mxf_write_packet+1254>: add %rax,%rax
0x00000000006b87f4 <mxf_write_packet+1257>: add %rdx,%rax
0x00000000006b87f7 <mxf_write_packet+1260>: shl $0x3,%rax
0x00000000006b87fb <mxf_write_packet+1264>: add %rdi,%rax
=> 0x00000000006b87fe <mxf_write_packet+1267>: mov 0x8(%rax),%rax
0x00000000006b8802 <mxf_write_packet+1271>: mov %esi,%edx
0x00000000006b8804 <mxf_write_packet+1273>: sub %eax,%edx
0x00000000006b8806 <mxf_write_packet+1275>: mov %edx,%eax
0x00000000006b8808 <mxf_write_packet+1277>: mov %eax,0x10(%rcx)
0x00000000006b880b <mxf_write_packet+1280>: mov -0x58(%rbp),%rax
0x00000000006b880f <mxf_write_packet+1284>: mov %rax,%rdi
0x00000000006b8812 <mxf_write_packet+1287>: callq 0x6b57d4
<mxf_write_klv_fill>
0x00000000006b8817 <mxf_write_packet+1292>: mov -0x30(%rbp),%rax
0x00000000006b881b <mxf_write_packet+1296>: lea 0x38(%rax),%rcx
End of assembler dump.
(gdb) info all-registers
rax 0x1802312898 103115991192
rbx 0x0 0
rcx 0x1802312898 103115991192
rdx 0xffffffff 4294967295
rsi 0x0 0
rdi 0x23128b0 36776112
rbp 0x7fffffffe0c0 0x7fffffffe0c0
rsp 0x7fffffffe060 0x7fffffffe060
r8 0x61a0d5 6398165
r9 0x7ffff6905440 140737330041920
r10 0x0 0
r11 0x246 582
r12 0x406900 4221184
r13 0x7fffffffe3e0 140737488348128
r14 0x0 0
r15 0x0 0
rip 0x6b87fe 0x6b87fe <mxf_write_packet+1267>
eflags 0x10202 [ IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
st0 -nan(0x80008000800080) (raw 0xffff0080008000800080)
st1 -nan(0x80008000800080) (raw 0xffff0080008000800080)
st2 -nan(0x80008000800080) (raw 0xffff0080008000800080)
st3 -nan(0xb18afffdeb62) (raw 0xffff0000b18afffdeb62)
st4 -nan(0x80008000800080) (raw 0xffff0080008000800080)
st5 -nan(0x80008000800080) (raw 0xffff0080008000800080)
st6 -nan(0x80008000800080) (raw 0xffff0080008000800080)
st7 -nan(0x6492fffed24a) (raw 0xffff00006492fffed24a)
fctrl 0x37f 895
fstat 0x0 0
ftag 0xffff 65535
fiseg 0x0 0
fioff 0x0 0
foseg 0x0 0
fooff 0x0 0
fop 0x0 0
mxcsr 0x1fa0 [ PE IM DM ZM OM UM PM ]
ymm0 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
0x00000000000000000000000000000000}}
ymm1 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
0x00000000000000000000000000000000}}
ymm2 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
0x00000000000000000000000000000000}}
ymm3 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x8000000000000000, 0x0,
0x0}, v32_int8 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x0 <repeats 16 times>}, v16_int16 = {0x0, 0x0, 0x0, 0x0, 0x0, 0xffff,
0xffff, 0xffff, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0, 0x0, 0x0}, v8_int32 = {0x0, 0x0, 0xffff0000, 0xffffffff, 0x0,
0x0, 0x0, 0x0}, v4_int64 = {0x0,
0xffffffffffff0000, 0x0, 0x0}, v2_int128 =
{0xffffffffffff00000000000000000000,
0x00000000000000000000000000000000}}
ymm4 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
0x00000000000000000000000000000000}}
ymm5 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
0x00000000000000000000000000000000}}
ymm6 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
---Type <return> to continue, or q <return> to quit---
0x00000000000000000000000000000000}}
ymm7 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x0 <repeats 32 times>}, v16_int16 = {0x0 <repeats 16 times>},
v8_int32 = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_int64 = {0x0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000000000000000000000,
0x00000000000000000000000000000000}}
ymm8 {v8_float = {0x53500000, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_double = {0x0, 0x0, 0x0, 0x0},
v32_int8 = {0x35, 0x55, 0x55, 0x55, 0x55, 0x55, 0xa5, 0x3f, 0x0 <repeats
24 times>}, v16_int16 = {0x5535, 0x5555,
0x5555, 0x3fa5, 0x0 <repeats 12 times>}, v8_int32 = {0x55555535,
0x3fa55555, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_int64 = {0x3fa5555555555535, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000003fa5555555555535,
0x00000000000000000000000000000000}}
ymm9 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x39, 0xe2, 0xd9, 0xed, 0x6b, 0xc1, 0x56, 0x3f, 0x0 <repeats 24
times>}, v16_int16 = {0xe239, 0xedd9, 0xc16b,
0x3f56, 0x0 <repeats 12 times>}, v8_int32 = {0xedd9e239, 0x3f56c16b,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int64 = {
0x3f56c16bedd9e239, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000003f56c16bedd9e239,
0x00000000000000000000000000000000}}
ymm10 {v8_float = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0xe0, 0x11, 0x4a, 0xb3, 0xb5, 0xb6, 0x32, 0x3f, 0x0 <repeats 24
times>}, v16_int16 = {0x11e0, 0xb34a, 0xb6b5,
0x3f32, 0x0 <repeats 12 times>}, v8_int32 = {0xb34a11e0, 0x3f32b6b5,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int64 = {
0x3f32b6b5b34a11e0, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000003f32b6b5b34a11e0,
0x00000000000000000000000000000000}}
ymm11 {v8_float = {0x9d810300, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_double = {0x0, 0x0, 0x0, 0x0},
v32_int8 = {0x3, 0x81, 0x1d, 0x4f, 0xd0, 0xb7, 0x32, 0xbf, 0x0 <repeats
24 times>}, v16_int16 = {0x8103, 0x4f1d,
0xb7d0, 0xbf32, 0x0 <repeats 12 times>}, v8_int32 = {0x4f1d8103,
0xbf32b7d0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_int64 = {0xbf32b7d04f1d8103, 0x0, 0x0, 0x0}, v2_int128 =
{0x0000000000000000bf32b7d04f1d8103,
0x00000000000000000000000000000000}}
ymm12 {v8_float = {0x33ad0000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_double = {0x0, 0x0, 0x0, 0x0},
v32_int8 = {0x68, 0x9d, 0x99, 0x51, 0x66, 0xf7, 0x87, 0x3e, 0x0 <repeats
24 times>}, v16_int16 = {0x9d68, 0x5199,
0xf766, 0x3e87, 0x0 <repeats 12 times>}, v8_int32 = {0x51999d68,
0x3e87f766, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_int64 = {0x3e87f76651999d68, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000003e87f76651999d68,
0x00000000000000000000000000000000}}
ymm13 {v8_float = {0xc1e69, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0},
v32_int8 = {0x9d, 0xe6, 0x41, 0x49, 0x10, 0xa1, 0xd7, 0x39, 0x0 <repeats
24 times>}, v16_int16 = {0xe69d, 0x4941,
0xa110, 0x39d7, 0x0 <repeats 12 times>}, v8_int32 = {0x4941e69d,
0x39d7a110, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_int64 = {0x39d7a1104941e69d, 0x0, 0x0, 0x0}, v2_int128 =
{0x000000000000000039d7a1104941e69d,
0x00000000000000000000000000000000}}
ymm14 {v8_float = {0x62000000, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
0x0}, v4_double = {0x0, 0x0, 0x0, 0x0},
v32_int8 = {0x0, 0x88, 0x39, 0x52, 0x83, 0xb1, 0x3b, 0xbf, 0x0 <repeats
24 times>}, v16_int16 = {0x8800, 0x5239,
0xb183, 0xbf3b, 0x0 <repeats 12 times>}, v8_int32 = {0x52398800,
0xbf3bb183, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_int64 = {0xbf3bb18352398800, 0x0, 0x0, 0x0}, v2_int128 =
{0x0000000000000000bf3bb18352398800,
0x00000000000000000000000000000000}}
ymm15 {v8_float = {0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0},
v4_double = {0x0, 0x0, 0x0, 0x0}, v32_int8 = {
0x85, 0xce, 0x35, 0xa4, 0xc6, 0x97, 0xe7, 0x3f, 0x0 <repeats 24
times>}, v16_int16 = {0xce85, 0xa435, 0x97c6,
0x3fe7, 0x0 <repeats 12 times>}, v8_int32 = {0xa435ce85, 0x3fe797c6,
0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, v4_int64 = {
0x3fe797c6a435ce85, 0x0, 0x0, 0x0}, v2_int128 =
{0x00000000000000003fe797c6a435ce85,
0x00000000000000000000000000000000}}
(gdb) print mxf->edit_units_count
$1 = 0
(gdb) print mxf->index_entries
$2 = (MXFIndexEntry *) 0x23128b0
(gdb) print mxf->edit_unit_byte_count
$3 = 0
(gdb) print mxf->body_offset
$4 = 0
(gdb) print mxf->header_written
$5 = 1
(gdb) print mxf
$6 = (MXFContext *) 0x2104a80
}}}
https://github.com/FFmpeg/FFmpeg/blob/a852db796edce2792525d88ab47cf78222e01512/libavformat/mxfenc.c#L2455
{{{
} else if (!mxf->edit_unit_byte_count && st->index == 1) {
mxf->index_entries[mxf->edit_units_count-1].slice_offset =
mxf->body_offset -
mxf->index_entries[mxf->edit_units_count-1].offset;
}
}}}
--
Ticket URL: <https://trac.ffmpeg.org/ticket/4914#comment:2>
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