Stack-buffer-overflow in wasm-micro-runtime/core/iwasm/interpreter/wasm_interp_classic.c

[Messi-Q]

Stack-buffer-overflow in wasm-micro-runtime/core/iwasm/interpreter/wasm_interp_classic.c

[wenyongh]

@Messi-Q thanks for spotting the issue, from the call stack dumped, the stack-buffer-overflow occurs in function mask_signals in file posix_thread.c, L580:

wasm-micro-runtime/core/shared/platform/common/posix/posix_thread.c

Lines 572 to 580 in 4c2af25

	#if defined(__GNUC__) || defined(__clang__)
	__attribute__((no_sanitize_address))
	#endif
	static void
	mask_signals(int how)
	{
	sigset_t set;
	sigemptyset(&set);

But as you see, this function is set with __attribute__((no_sanitize_address)) which means address sanitizer should not be applied for it since it does some low-level magic (e.g. stack, signal related operations), but I am not sure why __attribute__((no_sanitize_address)) doesn't take effect in you environment. What is the compiler you used, is it clang or gcc? Could you modify the function to be like below:

#if defined(__GNUC__)
__attribute__((no_sanitize_address))
#elif defined(__clang__)
__attribute__((no_sanitize("address")))
#endif
static void
mask_signals(int how)
{
    ...
}

and try again? Thanks.