mirror of
https://github.com/RGBCube/serenity
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8c5cd97b45
The join_thread() syscall is not supposed to be interruptible by signals, but it was. And since the process death mechanism piggybacked on signal interrupts, it was possible to interrupt a pthread_join() by killing the process that was doing it, leading to confusing due to some assumptions being made by Thread::finalize() for threads that have a pending joiner. This patch fixes the issue by making "interrupted by death" a distinct block result separate from "interrupted by signal". Then we handle that state in join_thread() and tidy things up so that thread finalization doesn't get confused by the pending joiner being gone. Test: Tests/Kernel/null-deref-crash-during-pthread_join.cpp
21 lines
374 B
C++
21 lines
374 B
C++
#include <pthread.h>
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#include <stdio.h>
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#include <sys/select.h>
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#include <unistd.h>
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int main(int, char**)
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{
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pthread_t tid;
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pthread_create(
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&tid, nullptr, [](void*) -> void* {
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sleep(1);
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asm volatile("ud2");
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return nullptr;
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},
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nullptr);
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pthread_join(tid, nullptr);
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printf("ok\n");
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return 0;
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}
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