Kernel: Handle mmap requests on zero-length data file inodes safely

Author: https://github.com/supercomputer7
Commit: 3ad0e1a1d5
Pull-request: https://github.com/SerenityOS/serenity/pull/14785
Reviewed-by: https://github.com/IdanHo ✅

Kernel/Memory/SharedInodeVMObject.h

@@ -16,6 +16,7 @@ class SharedInodeVMObject final : public InodeVMObject {
 
 public:
     static ErrorOr<NonnullLockRefPtr<SharedInodeVMObject>> try_create_with_inode(Inode&);
+    static ErrorOr<NonnullLockRefPtr<SharedInodeVMObject>> try_create_with_inode_and_range(Inode&, u64 offset, size_t range_size);
     virtual ErrorOr<NonnullLockRefPtr<VMObject>> try_clone() override;
 
     ErrorOr<void> sync(off_t offset_in_pages = 0, size_t pages = -1);