Kernel: Allow read access sparingly to some /sys/kernel directory nodes

Those nodes are not exposing any sensitive information so there's no
harm in exposing them.

Kernel/FileSystem/SysFS/Subsystems/Kernel/DiskUsage.h

@@ -23,6 +23,8 @@ public:
 private:
     SysFSDiskUsage(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Interrupts.h

@@ -23,6 +23,8 @@ public:
 private:
     explicit SysFSInterrupts(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Keymap.h

@@ -23,6 +23,8 @@ public:
 private:
     explicit SysFSKeymap(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/MemoryStatus.h

@@ -23,6 +23,8 @@ public:
 private:
     explicit SysFSMemoryStatus(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Network/ARP.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSNetworkARPStats(SysFSDirectory const&);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Network/Adapters.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSNetworkAdaptersStats(SysFSDirectory const&);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Network/Local.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSLocalNetStats(SysFSDirectory const&);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Network/Route.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSNetworkRouteStats(SysFSDirectory const&);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Network/TCP.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSNetworkTCPStats(SysFSDirectory const&);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Network/UDP.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSNetworkUDPStats(SysFSDirectory const&);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Processes.h

@@ -23,6 +23,8 @@ public:
 private:
     explicit SysFSOverallProcesses(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/SystemStatistics.h

@@ -23,6 +23,8 @@ public:
 private:
     explicit SysFSSystemStatistics(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }

Kernel/FileSystem/SysFS/Subsystems/Kernel/Uptime.h

@@ -22,6 +22,8 @@ public:
 private:
     explicit SysFSUptime(SysFSDirectory const& parent_directory);
     virtual ErrorOr<void> try_generate(KBufferBuilder& builder) override;
+
+    virtual bool is_readable_by_jailed_processes() const override { return true; }
 };
 
 }