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93e172895a
When writing to /sys/kernel/request_panic it will do a kernel panic. Trying to truncate the node will result in kernel panic with a slightly different message.
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/SysFS/Subsystems/Kernel/RequestPanic.h>
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#include <Kernel/Library/Panic.h>
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#include <Kernel/Security/Jail.h>
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#include <Kernel/Tasks/Process.h>
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namespace Kernel {
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UNMAP_AFTER_INIT NonnullRefPtr<SysFSSystemRequestPanic> SysFSSystemRequestPanic::must_create(SysFSDirectory const& parent_directory)
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{
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return adopt_ref_if_nonnull(new (nothrow) SysFSSystemRequestPanic(parent_directory)).release_nonnull();
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}
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static ErrorOr<void> check_current_process_not_jailed()
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{
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return Process::current().jail().with([&](auto const& my_jail) -> ErrorOr<void> {
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if (my_jail)
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return Error::from_errno(EPERM);
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return {};
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});
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}
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ErrorOr<size_t> SysFSSystemRequestPanic::read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
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{
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TRY(check_current_process_not_jailed());
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return Error::from_errno(ENOTSUP);
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}
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ErrorOr<size_t> SysFSSystemRequestPanic::write_bytes(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*)
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{
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TRY(check_current_process_not_jailed());
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PANIC("SysFSSystemRequestPanic::write_bytes");
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VERIFY_NOT_REACHED();
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}
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ErrorOr<void> SysFSSystemRequestPanic::truncate(u64)
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{
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TRY(check_current_process_not_jailed());
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PANIC("SysFSSystemRequestPanic::truncate");
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VERIFY_NOT_REACHED();
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}
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}
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