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Kernel: Prevent regular users from accessing other processes' threads

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kleines Filmröllchen 2022-07-24 18:01:57 +02:00 • committed by Linus Groh
parent 2477409680
commit bbe40ae632
1 changed files with 4 additions and 0 deletions
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4
Kernel/Syscalls/sched.cpp
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@ -29,6 +29,10 @@ ErrorOr<NonnullRefPtr<Thread>> Process::get_thread_from_pid_or_tid(pid_t pid_or_
if (pid_or_tid != 0) if (pid_or_tid != 0)
peer = Thread::from_tid(pid_or_tid); peer = Thread::from_tid(pid_or_tid);
// Only superuser can access other processes' threads.
if (!credentials()->is_superuser() && peer && &peer->process() != this)
return EPERM;
break; break;
} }
case Syscall::SchedulerParametersMode::Process: { case Syscall::SchedulerParametersMode::Process: {