Fix alignment calculation for large offsets (bytecodealliance#4791)

kylo5aby · casaroli · commit 2d2efbd2b8b4 · 2026-04-21T18:04:32.000+02:00
Signed-off-by: zhenweijin &lt;zhenwei.jin@intel.com&gt;
diff --git a/core/iwasm/compilation/aot_emit_memory.c b/core/iwasm/compilation/aot_emit_memory.c
@@ -676,7 +676,7 @@ aot_check_memory_overflow(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
                 *alignp = max_align;
             }
             else {
-                unsigned int align = 1 << (shift - 1);
+                unsigned int align = 1U << (shift - 1);
                 if (align > max_align) {
                     align = max_align;
                 }

Original file line number	Diff line number	Diff line change
`@@ -676,7 +676,7 @@ aot_check_memory_overflow(AOTCompContext comp_ctx, AOTFuncContext func_ctx,`
`676`	`676`	`*alignp = max_align;`
`677`	`677`	`}`
`678`	`678`	`else {`
`679`		`- unsigned int align = 1 << (shift - 1);`
	`679`	`+ unsigned int align = 1U << (shift - 1);`
`680`	`680`	`if (align > max_align) {`
`681`	`681`	`align = max_align;`
`682`	`682`	`}`