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d0f314b23cbf430848010669d9ccd92f2aee5879
ladybird/Kernel
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Sahan Fernando d0f314b23c Kernel: Fix subtle race condition in sys$write implementation 
There is a slight race condition in our implementation of write().
We call File::can_write() before attempting to write to it (blocking if
it returns false). If it returns true, we assume that we can write to
the file, and our code assumes that File::write() cannot possibly fail
by being blocked. There is, however, the rare case where another process
writes to the file and prevents further writes in between the call to
Files::can_write() and File::write() in the first process. This would
result in the first process calling File::write() when it cannot be
written to.

We fix this by adding a mechanism for File::can_write() to signal that
it was blocked, making it the responsibilty of File::write() to check
whether it can write and then finally making sys$write() check if the
write failed due to it being blocked.
2021-05-18 16:33:15 +02:00
..
ACPI
Kernel/ACPI: Map two pages when reading the FADT
2021-05-08 19:15:54 +02:00
API
Kernel+Userspace: Implement the accept4() system call
2021-05-17 13:32:19 +02:00
Arch
Kernel/Graphics + SystemServer: Support text mode properly
2021-05-16 19:58:33 +02:00
Devices
Kernel: Fix subtle race condition in sys$write implementation
2021-05-18 16:33:15 +02:00
FileSystem
Kernel: Rename Console => ConsoleDevice
2021-05-16 19:58:33 +02:00
Graphics
Everywhere: Fix a bunch of typos
2021-05-17 17:48:55 +01:00
Heap
BitmapView: Disable mutations of the underlying Bitmap
2021-05-18 08:10:45 +02:00
Interrupts
Kernel: Add Processor::is_bootstrap_processor() function, and use it. (#6871)
2021-05-05 18:48:26 +02:00
Modules
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Net
Kernel: Avoid allocations when receiving network packets
2021-05-18 16:06:27 +02:00
PCI
Kernel: Add support for QEMU's emulated pci serial (-pci-serial option)
2021-05-17 19:45:35 +01:00
Storage
Kernel: Don't ref-count UsedMemoryRange during iteration
2021-05-16 19:58:33 +02:00
Syscalls
Kernel: Fix subtle race condition in sys$write implementation
2021-05-18 16:33:15 +02:00
Tasks
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Time
Kernel: Fix return value for {enable,disable}_profile_timer()
2021-05-17 21:53:04 +02:00
TTY
LibVT: Fix newline handling
2021-05-17 18:19:49 +02:00
VirtIO
Kernel: Reorder VirtIODevice PCI initialization steps
2021-05-15 23:29:03 +01:00
VM
Kernel: Expand the kernel memory slot from 16 MiB to 32 MiB
2021-05-16 19:58:33 +02:00
AddressSanitizer.cpp
Everywhere: Use bgianf@serenityos.org for my copyright attribution
2021-04-22 21:15:54 +02:00
AddressSanitizer.h
Everywhere: Use bgianf@serenityos.org for my copyright attribution
2021-04-22 21:15:54 +02:00
Assertions.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
CMakeLists.txt
Build: Stop using precompiled headers (PCH)
2021-05-17 19:30:12 +02:00
CMOS.cpp
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
CMOS.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
CommandLine.cpp
Kernel: Allow the user to specify the virtual console when booting
2021-05-16 19:58:33 +02:00
CommandLine.h
Kernel: Allow the user to specify the virtual console when booting
2021-05-16 19:58:33 +02:00
ConsoleDevice.cpp
Kernel: Rename Console => ConsoleDevice
2021-05-16 19:58:33 +02:00
ConsoleDevice.h
Kernel: Rename Console => ConsoleDevice
2021-05-16 19:58:33 +02:00
CoreDump.cpp
Everywhere: Use linusg@serenityos.org for my copyright headers
2021-04-22 22:51:19 +02:00
CoreDump.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Debug.h.in
Kernel/Graphics + SystemServer: Support text mode properly
2021-05-16 19:58:33 +02:00
DMI.cpp
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
DMI.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
DoubleBuffer.cpp
Kernel: Implement peek() function for DoubleBuffer
2021-04-29 08:09:53 +02:00
DoubleBuffer.h
Kernel: Implement peek() function for DoubleBuffer
2021-04-29 08:09:53 +02:00
Forward.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
FutexQueue.cpp
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00
FutexQueue.h
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00
init.cpp
Kernel: Implement a PCI Serial Device driver
2021-05-17 18:15:25 +02:00
IO.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
KBuffer.h
Kernel: Make KBuffer::try_create_with* APIs OOM safe
2021-05-13 16:21:53 +02:00
KBufferBuilder.cpp
Kernel: Replace make<T>() with adopt_own_if_nonnull() in KBufferBuilder
2021-05-13 16:21:53 +02:00
KBufferBuilder.h
Kernel: Avoid allocations in KBufferBuilder::appendff
2021-05-13 08:27:42 +02:00
kprintf.cpp
Kernel: Implement a PCI Serial Device driver
2021-05-17 18:15:25 +02:00
KResult.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
kstdio.h
Kernel/Graphics + SystemServer: Support text mode properly
2021-05-16 19:58:33 +02:00
KSyms.cpp
Kernel: Check kernel symbol's name length matches searched name
2021-04-28 22:14:32 +02:00
KSyms.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
linker.ld
Kernel: Define a KERNEL_VIRTUAL_BASE in the linker script
2021-03-04 18:25:01 +01:00
Lock.cpp
Kernel: Utilize AK::SourceLocation for LOCK_DEBUG instrumentation.
2021-04-25 09:38:27 +02:00
Lock.h
Kernel: Remove the now defunct LOCKER(..) macro.
2021-04-25 09:38:27 +02:00
LockMode.h
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00
mkmap.sh
…
Module.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Multiboot.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Panic.cpp
Kernel/Graphics + SystemServer: Support text mode properly
2021-05-16 19:58:33 +02:00
Panic.h
Kernel/Graphics + SystemServer: Support text mode properly
2021-05-16 19:58:33 +02:00
PerformanceEventBuffer.cpp
AK+Kernel+LibELF: Remove the need for IteratorDecision::Continue
2021-05-16 10:36:52 +01:00
PerformanceEventBuffer.h
Kernel+Profiler: Track lost time between profiler timer ticks
2021-05-14 00:35:57 +02:00
PerformanceManager.h
Kernel+Profiler: Track lost time between profiler timer ticks
2021-05-14 00:35:57 +02:00
PhysicalAddress.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Process.cpp
Kernel: Disable profile timer when the process exits
2021-05-17 21:53:04 +02:00
Process.h
Kernel+Userspace: Implement the accept4() system call
2021-05-17 13:32:19 +02:00
ProcessGroup.cpp
AK: Rename adopt() to adopt_ref()
2021-04-23 16:46:57 +02:00
ProcessGroup.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Random.cpp
Kernel: Remove the now defunct LOCKER(..) macro.
2021-04-25 09:38:27 +02:00
Random.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
RTC.cpp
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
RTC.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Scheduler.cpp
Kernel: Print scheduler state to the display console
2021-05-16 19:58:33 +02:00
Scheduler.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
SpinLock.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
StdLib.cpp
Kernel: Enable building the kernel with -flto
2021-04-29 20:26:36 +02:00
StdLib.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
Syscall.cpp
Kernel: Enable building the kernel with -flto
2021-04-29 20:26:36 +02:00
Thread.cpp
AK+Kernel+LibELF: Remove the need for IteratorDecision::Continue
2021-05-16 10:36:52 +01:00
Thread.h
AK+Kernel+LibELF: Remove the need for IteratorDecision::Continue
2021-05-16 10:36:52 +01:00
ThreadBlockers.cpp
Kernel: Modify TimeManagement::current_time(..) API so it can't fail. (#6869)
2021-05-05 18:51:06 +02:00
ThreadTracer.cpp
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
ThreadTracer.h
Kernel: Make Process::start_tracing_from API OOM safe
2021-05-13 16:21:53 +02:00
TimerQueue.cpp
Kernel: Modify TimeManagement::current_time(..) API so it can't fail. (#6869)
2021-05-05 18:51:06 +02:00
TimerQueue.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
UBSanitizer.cpp
Kernel: Halt CPU on deadly UBSAN instead of calling PANIC
2021-05-15 09:00:29 +02:00
UBSanitizer.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
UnixTypes.h
Kernel+LibC: Add fstatat
2021-05-14 23:32:10 +02:00
UnveilNode.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
UserOrKernelBuffer.cpp
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
UserOrKernelBuffer.h
Kernel: Make UserOrKernelBuffer R/W helpers return KResultOr<size_t>
2021-05-13 23:28:40 +02:00
VirtualAddress.h
Everything: Move to SPDX license identifiers in all files.
2021-04-22 11:22:27 +02:00
WaitQueue.cpp
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00
WaitQueue.h
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00
WorkQueue.cpp
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00
WorkQueue.h
Everywhere: Use "the SerenityOS developers." in copyright headers
2021-04-29 00:59:26 +02:00