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Stack-use-after-scope (/libde265/libde265/build/libde265/liblibde265.so+0x19337f) in void apply_sao_internal(de265_image*, int, int, slice_segment_header const*, int, int, int, unsigned short const*, int, unsigned short*, int)
Version
$ ./dec265 -h
dec265 v1.0.8
--------------
usage: dec265 [options] videofile.bin
The video file must be a raw bitstream, or a stream with NAL units (option -n).
options:
-q, --quiet do not show decoded image
-t, --threads N set number of worker threads (0 - no threading)
-c, --check-hash perform hash check
-n, --nal input is a stream with 4-byte length prefixed NAL units
-f, --frames N set number of frames to process
-o, --output write YUV reconstruction
-d, --dump dump headers
-0, --noaccel do not use any accelerated code (SSE)
-v, --verbose increase verbosity level (up to 3 times)
-L, --no-logging disable logging
-B, --write-bytestream FILENAME write raw bytestream (from NAL input)
-m, --measure YUV compute PSNRs relative to reference YUV
-T, --highest-TID selecthighest temporal sublayer to decode
--disable-deblocking disable deblocking filter
--disable-sao disable sample-adaptive offset filter
-h, --help show help
Replay
git clone https://github.com/strukturag/libde265.git
cd libde265
mkdir build
cd build
cmake ../ -DCMAKE_CXX_FLAGS="-fsanitize=address"
make -j$(nproc)
./dec265/dec265 poc19
ASAN
WARNING: end_of_sub_stream_one_bit not set to 1 when it should be
WARNING: non-existing PPS referenced
WARNING: CTB outside of image area (concealing stream error...)
=================================================================
==50847==ERROR: AddressSanitizer: stack-use-after-scope on address 0x7ffc2aa1734c at pc 0x7f8a42e42380 bp 0x7ffc2aa14530 sp 0x7ffc2aa14520
READ of size 4 at 0x7ffc2aa1734c thread T0
#0 0x7f8a42e4237f in void apply_sao_internal<unsigned short>(de265_image*, int, int, slice_segment_header const*, int, int, int, unsigned short const*, int, unsigned short*, int) (/libde265/libde265/build/libde265/liblibde265.so+0x19337f)#1 0x7f8a42e403b6 in void apply_sao<unsigned char>(de265_image*, int, int, slice_segment_header const*, int, int, int, unsigned char const*, int, unsigned char*, int) (/libde265/libde265/build/libde265/liblibde265.so+0x1913b6)#2 0x7f8a42e3e909 in apply_sample_adaptive_offset_sequential(de265_image*) (/libde265/libde265/build/libde265/liblibde265.so+0x18f909)#3 0x7f8a42dcca5d in decoder_context::run_postprocessing_filters_sequential(de265_image*) (/libde265/libde265/build/libde265/liblibde265.so+0x11da5d)#4 0x7f8a42dc3ecf in decoder_context::decode_some(bool*) (/libde265/libde265/build/libde265/liblibde265.so+0x114ecf)#5 0x7f8a42dc6ba8 in decoder_context::decode(int*) (/libde265/libde265/build/libde265/liblibde265.so+0x117ba8)#6 0x7f8a42dade95 in de265_decode (/libde265/libde265/build/libde265/liblibde265.so+0xfee95)#7 0x55bb6e3b2bc9 in main (/libde265/libde265/build/dec265/dec265+0x6bc9)#8 0x7f8a428dfc86 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x21c86)#9 0x55bb6e3b09b9 in _start (/libde265/libde265/build/dec265/dec265+0x49b9)
Address 0x7ffc2aa1734c is located in stack of thread T0 at offset 10268 in frame
#0 0x55bb6e3b183a in main (/libde265/libde265/build/dec265/dec265+0x583a)
This frame has 7 object(s):
[32, 36) 'option_index'
[96, 100) 'more'
[160, 176) 'tv_start'
[224, 240) 'tv_end'
[288, 291) 'sc'
[352, 356) 'len'
[416, 41376) 'buf'<== Memory access at offset 10268 is inside this variable
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-use-after-scope (/libde265/libde265/build/libde265/liblibde265.so+0x19337f) in void apply_sao_internal<unsigned short>(de265_image*, int, int, slice_segment_header const*, int, int, int, unsigned short const*, int, unsigned short*, int)
Shadow bytes around the buggy address:
0x10000553ae10: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553ae20: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553ae30: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553ae40: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553ae50: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
=>0x10000553ae60: f8 f8 f8 f8 f8 f8 f8 f8 f8[f8]f8 f8 f8 f8 f8 f8
0x10000553ae70: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553ae80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553ae90: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553aea0: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
0x10000553aeb0: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==50847==ABORTING
Description
Stack-use-after-scope (/libde265/libde265/build/libde265/liblibde265.so+0x19337f) in void apply_sao_internal(de265_image*, int, int, slice_segment_header const*, int, int, int, unsigned short const*, int, unsigned short*, int)
Version
Replay
ASAN
POC
https://github.com/FDU-Sec/poc/blob/main/libde265/poc19
Environment
Credit
Peng Deng (Fudan University)
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