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Synchronous signals must accommodate a synchronous signal being raised during delivery, as asynchronous ones do. For example badframe errors during delivery will cause SIGSEGV to be raised. Without this fix, cpu_loop() runs process_pending_signals() which delivers the first synchronous signal (e.g., SIGILL) which fails to set the handler and forces SIGSEGV, but that is not picked up. process_pending_signals() returns. Then cpu_loop() runs cpu_exec() again, which attempts to execute the same instruction, another SIGILL. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20260321135624.581398-3-npiggin@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>