vfs: coredump fix: write zeroes for missing memory

servers/vfs/coredump.c

@@ -310,9 +310,9 @@ static void dump_segments(struct filp *f, Elf_Phdr phdrs[], int phnum)
 			(phys_bytes) CLICK_SIZE);
 
 		if(r != OK) {
-			printf("VFS: vircopy failed for %d @ 0x%lx during coredump\n",
-				fp->fp_endpoint, p);
-			break;
+			/* memory didn't exist; write as zeroes */
+			memset(buf, 0, sizeof(buf));
+			continue;
 		}
 
 		write_buf(f, (char *) buf, (off + CLICK_SIZE <= (off_t) len) ?