fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2025-12-22 09:19:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

Kernel: Let MouseDevice and KeyboardDevice write method return EINVAL

Browse Source 
Currently, writing anything to `/dev/mouse0` or `/dev/keyboard0` causes
the Kernel to panic. The reason for this is that
`[Mouse,Keyboard]Device::write` always returns 0, which is explicitly
prohibited by `VERIFY` macro in `Process::sys$write`.  The fix seems
trivial; `write` should return EINVAL instead (as is the case with, for
example, `KCOVDevice`).
This commit is contained in:
Przemysław R. Kusiak
2021-09-18 04:07:19 +02:00
committed by Idan Horowitz
parent 6e1f6bd684
commit c6e23e45c5
4 changed files with 2 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
Kernel/Devices/HID/KeyboardDevice.cpp
View File

@@ -306,11 +306,6 @@ KResultOr<size_t> KeyboardDevice::read(OpenFileDescription&, u64, UserOrKernelBu
return nread;
}
KResultOr<size_t> KeyboardDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t)
{
return 0;
}
KResult KeyboardDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
{
switch (request) {

2
Kernel/Devices/HID/KeyboardDevice.h
View File

@@ -27,7 +27,7 @@ public:
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
// ^HIDDevice

5
Kernel/Devices/HID/MouseDevice.cpp
View File

@@ -48,9 +48,4 @@ KResultOr<size_t> MouseDevice::read(OpenFileDescription&, u64, UserOrKernelBuffe
return nread;
}
KResultOr<size_t> MouseDevice::write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t)
{
return 0;
}
}

2
Kernel/Devices/HID/MouseDevice.h
View File

@@ -25,7 +25,7 @@ public:
// ^CharacterDevice
virtual KResultOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override;
virtual bool can_read(const OpenFileDescription&, size_t) const override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override;
virtual KResultOr<size_t> write(OpenFileDescription&, u64, const UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual bool can_write(const OpenFileDescription&, size_t) const override { return true; }
// ^HIDDevice