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Kernel: Harden Process Vector usage against OOM.

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This commit is contained in:
Brian Gianforcaro
2021-04-30 03:18:10 -07:00
committed by Linus Groh
parent ee84b8a845
commit 2ee1731966
1 changed files with 4 additions and 1 deletions
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5
Kernel/Process.cpp
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@@ -146,7 +146,10 @@ RefPtr<Process> Process::create_user_process(RefPtr<Thread>& first_thread, const
auto process = adopt_ref(*new Process(first_thread, parts.take_last(), uid, gid, parent_pid, false, move(cwd), nullptr, tty));
if (!first_thread)
return {};
process->m_fds.resize(m_max_open_file_descriptors);
if (!process->m_fds.try_resize(m_max_open_file_descriptors)) {
first_thread = nullptr;
return {};
}
auto& device_to_use_as_tty = tty ? (CharacterDevice&)*tty : NullDevice::the();
auto description = device_to_use_as_tty.open(O_RDWR).value();
process->m_fds[0].set(*description);