diff --git a/kmod/src/data.c b/kmod/src/data.c
index e052044a..08e5fc09 100644
--- a/kmod/src/data.c
+++ b/kmod/src/data.c
@@ -1915,6 +1915,7 @@ static int scoutfs_data_page_mkwrite(struct vm_area_struct *vma,
 	int err;
 
 	sb_start_pagefault(sb);
+	inode_lock(inode);
 	down_write(&si->extent_sem);
 
 retry:
@@ -2007,6 +2008,7 @@ static int scoutfs_data_page_mkwrite(struct vm_area_struct *vma,
 	scoutfs_per_task_del(&si->pt_data_lock, &pt_ent);
 	scoutfs_unlock(sb, lock, SCOUTFS_LOCK_WRITE);
 	up_write(&si->extent_sem);
+	inode_unlock(inode);
 	if (scoutfs_data_wait_found(&dw)) {
 		ret = scoutfs_data_wait(inode, &dw);
 		if (ret == 0)