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arm64: signal: Force SIGKILL for unknown signals in force_signal_inject
For signals other than SIGKILL or those with siginfo_layout(signal, code) == SIL_FAULT then force_signal_inject does not initialise the siginfo_t properly. Since the signal number is determined solely by the caller, simply WARN on unknown signals and force to SIGKILL. Reported-by: Dave Martin <[email protected]> Signed-off-by: Will Deacon <[email protected]>
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