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6be581aeff
The NCI test collects the exit status of its helper threads by passing
the address of an int to pthread_join():
int status;
...
pthread_join(thread_t, (void **) &status);
pthread_join() stores a void pointer to the memory location. On 64-bit
systems, a void pointer is wider than an int, so the store overruns the
4 bytes of space allocated on the stack for the integer and corrupts the
adjacent stack. On our CHERI system, this caused a fault due to a
capability bounds violation.
Fix this by introducing a helper that joins a thread through a void
pointer and converts the result back to an integer, which is what the
helper threads return.
While here, also fix the logic in disconnect_tag() if the helper thread
creation failed. Previously, it would have joined a thread that was
never created when pthread_create() failed.
Fixes:
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|---|---|---|
| .. | ||
| accounting | ||
| arch | ||
| bootconfig | ||
| bpf | ||
| build | ||
| certs | ||
| cgroup | ||
| counter | ||
| crypto | ||
| debugging | ||
| dma | ||
| docs | ||
| firewire | ||
| firmware | ||
| gpio | ||
| hv | ||
| iio | ||
| include | ||
| kvm/kvm_stat | ||
| laptop | ||
| leds | ||
| lib | ||
| memory-model | ||
| mm | ||
| net | ||
| objtool | ||
| pcmcia | ||
| perf | ||
| platform/x86/amd | ||
| power | ||
| rcu | ||
| sched | ||
| sched_ext | ||
| scripts | ||
| sound | ||
| spi | ||
| testing | ||
| thermal | ||
| time | ||
| tracing | ||
| unittests | ||
| usb | ||
| verification | ||
| virtio | ||
| wmi | ||
| workqueue | ||
| writeback | ||
| Makefile | ||