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waitpid: fix use after free

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Matheus
2024-05-09 13:06:51 -03:00
parent cab7901825
commit efecdade64
1 changed files with 6 additions and 0 deletions
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kernel-src/sys/syscalls/waitpid.c
+6
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@@ -75,6 +75,12 @@ syscallret_t syscall_waitpid(context_t *context, pid_t pid, int *status, int opt
for (int i = 0; i < iterator->threadtablesize; ++i) {
if (iterator->threads[i] == NULL)
continue;
volatile int *flags = (volatile int *)(&iterator->threads[i]->flags);
// wait until the thread can actually be unallocated
while ((*flags & SCHED_THREAD_FLAGS_DEAD) == 0)
sched_yield();
sched_destroythread(iterator->threads[i]);
}