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Kernel: Fix USB hotplug crash

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Currently the SysFS node for USB devices is only initialized for USB
hubs, which means it will cause a kernel crash upon being dereferenced
in a non-hub device. This fixes the problem by making initialization
happen for all USB devices.
This commit is contained in:
b14ckcat 2022-07-26 21:35:35 -04:00 committed by Brian Gianforcaro
parent 11cb7c7b28
commit 4b1537387f
Notes: sideshowbarker 2024-07-17 08:32:37 +09:00 
Author: https://github.com/b14ckcat
Commit: https://github.com/SerenityOS/serenity/commit/4b1537387f
Pull-request: https://github.com/SerenityOS/serenity/pull/14703
Reviewed-by: https://github.com/bgianfo ✅
2 changed files with 2 additions and 2 deletions
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2
Kernel/Bus/USB/USBDevice.cpp
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@ -20,6 +20,8 @@ ErrorOr<NonnullRefPtr<Device>> Device::try_create(USBController const& controlle
{ {
auto pipe = TRY(Pipe::try_create_pipe(controller, Pipe::Type::Control, Pipe::Direction::Bidirectional, 0, 8, 0)); auto pipe = TRY(Pipe::try_create_pipe(controller, Pipe::Type::Control, Pipe::Direction::Bidirectional, 0, 8, 0));
auto device = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Device(controller, port, speed, move(pipe)))); auto device = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) Device(controller, port, speed, move(pipe))));
auto sysfs_node = TRY(SysFSUSBDeviceInformation::create(*device));
device->m_sysfs_device_info_node = move(sysfs_node);
TRY(device->enumerate_device()); TRY(device->enumerate_device());
return device; return device;
} }

2
Kernel/Bus/USB/USBHub.cpp
View file

@ -45,8 +45,6 @@ ErrorOr<void> Hub::enumerate_and_power_on_hub()
// USBDevice::enumerate_device must be called before this. // USBDevice::enumerate_device must be called before this.
VERIFY(m_address > 0); VERIFY(m_address > 0);
m_sysfs_device_info_node = TRY(SysFSUSBDeviceInformation::create(*this));
if (m_device_descriptor.device_class != USB_CLASS_HUB) { if (m_device_descriptor.device_class != USB_CLASS_HUB) {
dbgln("USB Hub: Trying to enumerate and power on a device that says it isn't a hub."); dbgln("USB Hub: Trying to enumerate and power on a device that says it isn't a hub.");
return EINVAL; return EINVAL;