Kernel: InodeVMObject can't call Inode::size() with interrupts disabled

Inode::size() may try to take a lock, so we can't be calling it with
interrupts disabled.

This fixes a kernel hang when trying to execute a binary in a TmpFS.

2 files changed, 5 insertions, 4 deletions

diff --git a/Kernel/VM/InodeVMObject.cpp b/Kernel/VM/InodeVMObject.cpp
index 6eee62c629..55c7eed6b5 100644
--- a/Kernel/VM/InodeVMObject.cpp
+++ b/Kernel/VM/InodeVMObject.cpp
@@ -5,10 +5,11 @@
 
 NonnullRefPtr<InodeVMObject> InodeVMObject::create_with_inode(Inode& inode)
 {
+    size_t size = inode.size();
     InterruptDisabler disabler;
     if (inode.vmobject())
         return *inode.vmobject();
-    auto vmobject = adopt(*new InodeVMObject(inode));
+    auto vmobject = adopt(*new InodeVMObject(inode, size));
     vmobject->inode().set_vmobject(*vmobject);
     return vmobject;
 }
@@ -18,8 +19,8 @@ NonnullRefPtr<VMObject> InodeVMObject::clone()
     return adopt(*new InodeVMObject(*this));
 }
 
-InodeVMObject::InodeVMObject(Inode& inode)
-    : VMObject(inode.size())
+InodeVMObject::InodeVMObject(Inode& inode, size_t size)
+    : VMObject(size)
     , m_inode(inode)
     , m_dirty_pages(page_count(), false)
 {
diff --git a/Kernel/VM/InodeVMObject.h b/Kernel/VM/InodeVMObject.h
index 876cdf20ae..a974c16f49 100644
--- a/Kernel/VM/InodeVMObject.h
+++ b/Kernel/VM/InodeVMObject.h
@@ -22,7 +22,7 @@ public:
     int release_all_clean_pages();
 
 private:
-    explicit InodeVMObject(Inode&);
+    explicit InodeVMObject(Inode&, size_t);
     explicit InodeVMObject(const InodeVMObject&);
 
     InodeVMObject& operator=(const InodeVMObject&) = delete;