Index: sys/kern/imgact_elf.c
===================================================================
--- sys/kern/imgact_elf.c
+++ sys/kern/imgact_elf.c
@@ -839,17 +839,12 @@
 			break;
 		case PT_INTERP:
 			/* Path to interpreter */
-			if (phdr[i].p_filesz > MAXPATHLEN) {
-				uprintf("Invalid PT_INTERP\n");
-				error = ENOEXEC;
-				goto ret;
-			}
 			if (interp != NULL) {
 				uprintf("Multiple PT_INTERP headers\n");
 				error = ENOEXEC;
 				goto ret;
 			}
-			interp_name_len = phdr[i].p_filesz;
+			interp_name_len = min(phdr[i].p_filesz, MAXPATHLEN);
 			if (phdr[i].p_offset > PAGE_SIZE ||
 			    interp_name_len > PAGE_SIZE - phdr[i].p_offset) {
 				VOP_UNLOCK(imgp->vp, 0);
@@ -870,6 +865,12 @@
 			} else {
 				interp = __DECONST(char *, imgp->image_header) +
 				    phdr[i].p_offset;
+			}
+			if (strlen(interp) >= MAXPATHLEN) {
+				uprintf("Invalid PT_INTERP (too long)\n");
+				error = ENOEXEC;
+				VOP_UNLOCK(imgp->vp, 0);
+				goto ret;
 			}
 			break;
 		case PT_GNU_STACK: