1 files changed, 10 insertions, 0 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 6e3de63c3055..bcd7f97beab9 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1597,6 +1597,16 @@ ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *from)
         struct file *file = iocb->ki_filp;
         struct blk_plug plug;
         ssize_t ret;
+        size_t count = iov_iter_count(from);
+
+        ret = generic_write_checks(file, &iocb->ki_pos, &count, 1);
+        if (ret)
+                return ret;
+
+        if (count == 0)
+                return 0;
+
+        iov_iter_truncate(from, count);
 
         blk_start_plug(&plug);
         ret = __generic_file_write_iter(iocb, from);