Program(wasm3) DoS

[haruki3hhh]

version

139076a

build

cmake -DCMAKE_C_COMPILER="gcc" -DCMAKE_C_FLAGS="-g -fsanitize=address -fno-omit-frame-pointer" -DCMAKE_EXE_LINKER_FLAGS="-g -fsanitize=address -fno-omit-frame-pointer" .
make

reproduce

./wasm3 <PoC> ## program will DoS and block here.

PoC

PoC

[tommie]

wasm2wat says

0002455: error: memory.grow reserved value must be 0

With --enable-all it says

0002455: error: memory index 33 out of range

Looking at a trace, it seems to end up looping in dlmalloc between 1643 and 1662.

There's way too much inlined C code here to be reproducible without debug info (hence wasm2wat.)