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ladybird/Kernel
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Andreas Kling 11456ebc00 Kernel: Close race window in timestamp update mechanism 
As pointed out by 8infy, this mechanism is racy:

    WRITER:

        1. ++update1;
        2. write_data();
        3. ++update2;

    READER:

        1. do { auto saved = update1;
        2. read_data();
        3. } while (saved != update2);

The following sequence can lead to a bogus/partial read:

    R1      R2  R3
        W1  W2      W3

We close this race by incrementing the second update counter first:

    WRITER:

        1. ++update2;
        2. write_data();
        3. ++update1;
2021-08-10 21:51:05 +02:00
..
ACPI
Kernel: Move Mutex into Locking/
2021-08-07 11:48:00 +02:00
API
Kernel+LibC: Allow clock_gettime() to run without syscalls
2021-08-10 19:21:16 +02:00
Arch
Kernel/SMP: Change critical sections to not disable interrupts
2021-08-10 02:49:37 +02:00
Bus
Kernel/USB: Tighten up USBManagement enumeration code a bit
2021-08-09 22:52:09 +02:00
Devices
Everywhere: Replace AK::Singleton => Singleton
2021-08-08 00:03:45 +02:00
FileSystem
Kernel: Port BlockBasedFileSystem to ProtectedValue :^)
2021-08-08 00:28:10 +02:00
Graphics
Kernel: Remove unused "VGA font" memory region in GraphicsManagement
2021-08-08 14:24:54 +02:00
Heap
Kernel/SMP: Make entering/leaving critical sections multi-processor safe
2021-08-10 02:49:37 +02:00
Interrupts
Everywhere: Replace AK::Singleton => Singleton
2021-08-08 00:03:45 +02:00
Locking
Kernel/SMP: Change critical sections to not disable interrupts
2021-08-10 02:49:37 +02:00
Memory
Kernel: Don't hog MM lock in Memory::Region::clone()
2021-08-09 11:46:31 +02:00
Modules
…
Net
Kernel: Properly implement SO_ERROR option
2021-08-10 20:59:53 +02:00
Prekernel
Meta: Add Clang support to the CMake build scripts
2021-08-08 10:55:36 +02:00
Storage
Kernel: Remove unused mutex PATADiskDevice::m_lock
2021-08-08 00:08:24 +02:00
Syscalls
Kernel+LibC: Allow clock_gettime() to run without syscalls
2021-08-10 19:21:16 +02:00
Tasks
…
Time
Kernel: Close race window in timestamp update mechanism
2021-08-10 21:51:05 +02:00
TTY
Kernel: Fix logic typo in ConsoleManagement::is_initialized()
2021-08-09 11:46:30 +02:00
VirtIO
Kernel: Move SpinLock.h into Locking/
2021-08-07 11:48:00 +02:00
AddressSanitizer.cpp
…
AddressSanitizer.h
…
Assertions.h
AK+Kernel: Print TODO when a TODO() is executed
2021-08-04 11:01:16 +02:00
AtomicEdgeAction.h
…
BootInfo.h
Kernel: Support loading the kernel at almost arbitrary virtual addresses
2021-07-27 13:15:16 +02:00
CMakeLists.txt
Kernel/USB: Create controller base class and introduce USBManagement
2021-08-09 21:05:25 +02:00
CMOS.cpp
…
CMOS.h
…
CommandLine.cpp
Kernel/USB: Create controller base class and introduce USBManagement
2021-08-09 21:05:25 +02:00
CommandLine.h
Kernel/USB: Create controller base class and introduce USBManagement
2021-08-09 21:05:25 +02:00
ConsoleDevice.cpp
Everywhere: Replace AK::Singleton => Singleton
2021-08-08 00:03:45 +02:00
ConsoleDevice.h
…
CoreDump.cpp
Kernel/SMP: Skip thread registers in core dump if there is no trap frame
2021-08-10 02:49:37 +02:00
CoreDump.h
…
Debug.h.in
Kernel: Implement a ISO 9660 filesystem reader :^)
2021-08-07 15:21:58 +02:00
DoubleBuffer.cpp
Kernel: Add convenience values to the Memory::Region::Access enum
2021-08-06 22:25:00 +02:00
DoubleBuffer.h
Kernel: Move Mutex into Locking/
2021-08-07 11:48:00 +02:00
embedmap.sh
…
Forward.h
Kernel: Simplify the per-CPU SchedulerData struct
2021-08-08 14:24:54 +02:00
FutexQueue.cpp
…
FutexQueue.h
Kernel: Move SpinLock.h into Locking/
2021-08-07 11:48:00 +02:00
GlobalProcessExposed.cpp
Kernel: Migrate ARP table locking to ProtectedValue
2021-08-07 11:48:00 +02:00
init.cpp
Kernel/USB: Create controller base class and introduce USBManagement
2021-08-09 21:05:25 +02:00
IO.h
…
KBuffer.h
Kernel: Add convenience values to the Memory::Region::Access enum
2021-08-06 22:25:00 +02:00
KBufferBuilder.cpp
Kernel: Add convenience values to the Memory::Region::Access enum
2021-08-06 22:25:00 +02:00
KBufferBuilder.h
…
KLexicalPath.cpp
…
KLexicalPath.h
…
kprintf.cpp
Kernel: Move SpinLock.h into Locking/
2021-08-07 11:48:00 +02:00
KResult.h
…
kstdio.h
…
KString.cpp
…
KString.h
…
KSyms.cpp
Kernel: Print panic backtrace to both the screen and serial
2021-08-04 20:14:54 +02:00
KSyms.h
Kernel: Print panic backtrace to both the screen and serial
2021-08-04 20:14:54 +02:00
linker.ld
Kernel: Support loading the kernel at almost arbitrary virtual addresses
2021-07-27 13:15:16 +02:00
MiniStdLib.cpp
…
mkmap.sh
Kernel: Use our toolchain's c++filt tool for the kernel map
2021-07-29 10:38:31 +02:00
Module.h
…
Multiboot.h
Prekernel: Export some multiboot parameters in our own BootInfo struct
2021-07-27 13:15:16 +02:00
Panic.cpp
Kernel: Print panic backtrace to both the screen and serial
2021-08-04 20:14:54 +02:00
Panic.h
…
PerformanceEventBuffer.cpp
Kernel: Add convenience values to the Memory::Region::Access enum
2021-08-06 22:25:00 +02:00
PerformanceEventBuffer.h
…
PerformanceManager.h
Kernel: Rename Range => VirtualRange
2021-08-06 14:05:58 +02:00
PhysicalAddress.h
…
Process.cpp
Kernel: Remove unused Process::FileDescriptions::fd_flags()
2021-08-08 14:24:55 +02:00
Process.h
Kernel+LibC: Allow clock_gettime() to run without syscalls
2021-08-10 19:21:16 +02:00
ProcessExposed.cpp
…
ProcessExposed.h
Kernel/ProcFS: Make various things superuser-only once again
2021-07-28 18:59:53 +02:00
ProcessGroup.cpp
Everywhere: Replace AK::Singleton => Singleton
2021-08-08 00:03:45 +02:00
ProcessGroup.h
Kernel: Port process groups to SpinLockProtectedValue
2021-08-07 13:30:59 +02:00
ProcessSpecificExposed.cpp
Kernel: Rename Process::space() => Process::address_space()
2021-08-06 14:05:58 +02:00
Random.cpp
Everywhere: Replace AK::Singleton => Singleton
2021-08-08 00:03:45 +02:00
Random.h
Kernel: Move Lockable into its own header
2021-08-07 11:48:00 +02:00
RTC.cpp
Kernel: Ensure we read valid values from the RTC CMOS registers
2021-08-04 19:53:04 +02:00
RTC.h
Kernel: Ensure we read valid values from the RTC CMOS registers
2021-08-04 19:53:04 +02:00
SanCov.cpp
Kernel: Remove unused header includes
2021-08-01 08:10:16 +02:00
Scheduler.cpp
Kernel/SMP: Make entering/leaving critical sections multi-processor safe
2021-08-10 02:49:37 +02:00
Scheduler.h
Kernel: Rename queue_runnable_thread() => enqueue_runnable_thread()
2021-08-08 14:24:55 +02:00
Sections.h
Kernel: Support loading the kernel at almost arbitrary virtual addresses
2021-07-27 13:15:16 +02:00
StdLib.cpp
Kernel: Move Kernel/Memory/ code into Kernel::Memory namespace
2021-08-06 14:05:58 +02:00
StdLib.h
…
Syscall.cpp
Kernel: Rename Process::space() => Process::address_space()
2021-08-06 14:05:58 +02:00
Thread.cpp
Kernel/SMP: Change critical sections to not disable interrupts
2021-08-10 02:49:37 +02:00
Thread.h
Kernel/SMP: Skip thread registers in core dump if there is no trap frame
2021-08-10 02:49:37 +02:00
ThreadBlockers.cpp
Kernel: Make AsyncDeviceRequest::name() return StringView
2021-08-06 00:37:47 +02:00
ThreadTracer.cpp
…
ThreadTracer.h
…
TimerQueue.cpp
Everywhere: Replace AK::Singleton => Singleton
2021-08-08 00:03:45 +02:00
TimerQueue.h
Kernel: Do not cancel stale timers when servicing sys$alarm
2021-08-03 18:44:01 +02:00
UBSanitizer.cpp
…
UnixTypes.h
LibC+Kernel: Use an enum for clockid_t values
2021-08-10 13:01:39 +02:00
UserOrKernelBuffer.cpp
Kernel: Move Kernel/Memory/ code into Kernel::Memory namespace
2021-08-06 14:05:58 +02:00
UserOrKernelBuffer.h
Kernel: Move Kernel/Memory/ code into Kernel::Memory namespace
2021-08-06 14:05:58 +02:00
VirtualAddress.h
…
WaitQueue.cpp
…
WaitQueue.h
Kernel: Move SpinLock.h into Locking/
2021-08-07 11:48:00 +02:00
WorkQueue.cpp
Kernel: Move SpinLock.h into Locking/
2021-08-07 11:48:00 +02:00
WorkQueue.h
…