diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index f5d19e5..5f7c44a 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -567,6 +567,8 @@
 	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
 		return -EOPNOTSUPP;
 
+	mutex_lock(&inode->i_mutex);
+
 	if (mode & FALLOC_FL_PUNCH_HOLE)
 		ret = punch_hole(inode, offset, len);
 	else
@@ -576,6 +578,9 @@
 		inode->i_mtime = inode->i_ctime = CURRENT_TIME;
 		mark_inode_dirty(inode);
 	}
+
+	mutex_unlock(&inode->i_mutex);
+
 	trace_f2fs_fallocate(inode, mode, offset, len, ret);
 	return ret;
 }