SEGV exits in the function compileSWFActionCode in swftools/lib/action/actioncompiler.c

[guangbuming]

project

https://github.com/matthiaskramm/swftools
version:0.9.2

os info

Ubuntu20.04 TLS

poc

4_poc.zip

build

git clone https://github.com/matthiaskramm/swftools.git
cd swftools
./configure --disable-shared && make
./src/swfc 4_poc

ASAN Info

AddressSanitizer:DEADLYSIGNAL
=================================================================
==2664532==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x00000059d599 bp 0x7fffffffe050 sp 0x7fffffffdf80 T0)
==2664532==The signal is caused by a READ memory access.
==2664532==Hint: address points to the zero page.
    #0 0x59d599 in compileSWFActionCode /home/swftools/lib/action/actioncompiler.c
    #1 0x5275f8 in swf_ActionCompile /home/swftools/lib/modules/swfaction.c:1111:11
    #2 0x4e12af in s_action /home/swftools/src/swfc.c:1966:13
    #3 0x4fec01 in c_action /home/swftools/src/swfc.c
    #4 0x4ee709 in parseArgumentsForCommand /home/swftools/src/swfc.c:4475:5
    #5 0x4ee709 in main /home/swftools/src/swfc.c:4598:2
    #6 0x7ffff7c29082 in __libc_start_main /build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
    #7 0x41d63d in _start (/home/swftools/src/swfc+0x41d63d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /home/swftools/lib/action/actioncompiler.c in compileSWFActionCode
==2664532==ABORTING