CVE-2023-53712

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ARM: 9317/1: kexec: Make smp stop calls asynchronous<br /> <br /> If a panic is triggered by a hrtimer interrupt all online cpus will be<br /> notified and set offline. But as highlighted by commit 19dbdcb8039c<br /> ("smp: Warn on function calls from softirq context") this call should<br /> not be made synchronous with disabled interrupts:<br /> <br /> softdog: Initiating panic<br /> Kernel panic - not syncing: Software Watchdog Timer expired<br /> WARNING: CPU: 1 PID: 0 at kernel/smp.c:753 smp_call_function_many_cond<br /> unwind_backtrace:<br /> show_stack<br /> dump_stack_lvl<br /> __warn<br /> warn_slowpath_fmt<br /> smp_call_function_many_cond<br /> smp_call_function<br /> crash_smp_send_stop.part.0<br /> machine_crash_shutdown<br /> __crash_kexec<br /> panic<br /> softdog_fire<br /> __hrtimer_run_queues<br /> hrtimer_interrupt<br /> <br /> Make the smp call for machine_crash_nonpanic_core() asynchronous.