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Product Link

https://github.com/matthiaskramm/swftools

POC file

https://github.com/matthiaskramm/swftools/files/9034338/id31_SEGV.zip

Command to reproduce

./gif2swf -o /dev/null [sample file]

Product name & version

last github commit code : 772e55a

Problem Type

SEGV

Crash Detail

AddressSanitizer:DEADLYSIGNAL
==117415==ERROR: AddressSanitizer: SEGV on unknown address 0x61e000016efe (pc 0x7fb8e4a4e246 bp 0x7ffc023949b0 sp 0x7ffc02394148 T0)
==117415==The signal is caused by a WRITE memory access.
    #0 0x7fb8e4a4e246  /build/glibc-CVJwZb/glibc-2.27/string/../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:309
    #1 0x4ae15b in __asan_memcpy /home/bupt/Desktop/tools/llvm-12.0.1/llvm/projects/compiler-rt/lib/asan/asan_interceptors_memintrinsics.cpp:22
    #2 0x4f8251 in MovieAddFrame /home/bupt/Desktop/swftools/src/gif2swf.c:353:25
    #3 0x4fb9d9 in main /home/bupt/Desktop/swftools/src/gif2swf.c:730:21
    #4 0x7fb8e49b4c86 in __libc_start_main /build/glibc-CVJwZb/glibc-2.27/csu/../csu/libc-start.c:310
    #5 0x41cfb9 in _start (/home/bupt/Desktop/swftools/build/bin/gif2swf+0x41cfb9)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /build/glibc-CVJwZb/glibc-2.27/string/../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:309 
==117415==ABORTING

Crash summary

SUMMARY: AddressSanitizer: SEGV /build/glibc-CVJwZb/glibc-2.27/string/../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:309