Merge tag '9p-for-5.10-rc1' of git://github.com/martinetd/linux

Pull 9p updates from Dominique Martinet:
 "A couple of small fixes (loff_t overflow on 32bit, syzbot
  uninitialized variable warning) and code cleanup (xen)"

* tag '9p-for-5.10-rc1' of git://github.com/martinetd/linux:
  net: 9p: initialize sun_server.sun_path to have addr's value only when addr is valid
  9p/xen: Fix format argument warning
  9P: Cast to loff_t before multiplying

fs/9p/vfs_file.c

@@ -612,9 +612,9 @@ static void v9fs_mmap_vm_close(struct vm_area_struct *vma)
 	struct writeback_control wbc = {
 		.nr_to_write = LONG_MAX,
 		.sync_mode = WB_SYNC_ALL,
-		.range_start = vma->vm_pgoff * PAGE_SIZE,
+		.range_start = (loff_t)vma->vm_pgoff * PAGE_SIZE,
 		 /* absolute end, byte at end included */
-		.range_end = vma->vm_pgoff * PAGE_SIZE +
+		.range_end = (loff_t)vma->vm_pgoff * PAGE_SIZE +
 			(vma->vm_end - vma->vm_start - 1),
 	};
 

net/9p/trans_fd.c

@@ -1023,7 +1023,7 @@ p9_fd_create_unix(struct p9_client *client, const char *addr, char *args)
 
 	csocket = NULL;
 
-	if (addr == NULL)
+	if (!addr || !strlen(addr))
 		return -EINVAL;
 
 	if (strlen(addr) >= UNIX_PATH_MAX) {

net/9p/trans_xen.c

@@ -451,13 +451,13 @@ static int xen_9pfs_front_probe(struct xenbus_device *dev,
 		char str[16];
 
 		BUILD_BUG_ON(XEN_9PFS_NUM_RINGS > 9);
-		sprintf(str, "ring-ref%u", i);
+		sprintf(str, "ring-ref%d", i);
 		ret = xenbus_printf(xbt, dev->nodename, str, "%d",
 				    priv->rings[i].ref);
 		if (ret)
 			goto error_xenbus;
 
-		sprintf(str, "event-channel-%u", i);
+		sprintf(str, "event-channel-%d", i);
 		ret = xenbus_printf(xbt, dev->nodename, str, "%u",
 				    priv->rings[i].evtchn);
 		if (ret)