Commit a7e6f1ca authored Feb 20, 2018 by Will Deacon

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 <Dave.Martin@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent 2c9120f3

arch/arm64/kernel/traps.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -331,6 +331,12 @@ void force_signal_inject(int signal, int code, unsigned long address)
		break;
		}

		/* Force signals we don't understand to SIGKILL */
		if (WARN_ON(signal != SIGKILL \|\|
		siginfo_layout(signal, code) != SIL_FAULT)) {
		signal = SIGKILL;
		}

		if (unhandled_signal(current, signal) &&
		show_unhandled_signals_ratelimited()) {
		pr_info("%s[%d]: %s: pc=%08llx\n",