From d7a2d9ae0e7e4b3c5811bdfd4809cfc772062140 Mon Sep 17 00:00:00 2001 From: Ralf Jung Date: Wed, 25 May 2022 14:29:46 +0200 Subject: [PATCH] Miri call ABI check: ensure type size+align stay the same --- compiler/rustc_const_eval/src/interpret/terminator.rs | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/compiler/rustc_const_eval/src/interpret/terminator.rs b/compiler/rustc_const_eval/src/interpret/terminator.rs index a5c7d4c8e20..10da2f803af 100644 --- a/compiler/rustc_const_eval/src/interpret/terminator.rs +++ b/compiler/rustc_const_eval/src/interpret/terminator.rs @@ -185,7 +185,14 @@ fn check_argument_compat( // No question return true; } - // Compare layout + if caller_abi.layout.size != callee_abi.layout.size + || caller_abi.layout.align.abi != callee_abi.layout.align.abi + { + // This cannot go well... + // FIXME: What about unsized types? + return false; + } + // The rest *should* be okay, but we are extra conservative. match (caller_abi.layout.abi, callee_abi.layout.abi) { // Different valid ranges are okay (once we enforce validity, // that will take care to make it UB to leave the range, just