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