arm64: don't kill the kernel on a bad esr from el0
Rather than completely killing the kernel if we receive an esr value we can't deal with in the el0 handlers, send the process a SIGILL and log the esr value in the hope that we can debug it. If we receive a bad esr from el1, we'll die() as before. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
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