diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 3f49dc280c0..517d4042989 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -459,7 +459,8 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index,
 	}
 
 	if (page_zero_filled(uncmem)) {
-		kunmap_atomic(user_mem);
+		if (user_mem)
+			kunmap_atomic(user_mem);
 		/* Free memory associated with this sector now. */
 		write_lock(&zram->meta->tb_lock);
 		zram_free_page(zram, index);