[REVIEW][PATCH 03/26] signal/arm64: Use force_sig not force_sig_fault for SIGKILL

[Eric W. Biederman]

It really only matters to debuggers but the SIGKILL does not have any
si_codes that use the fault member of the siginfo union.  Correct this
the simple way and call force_sig instead of force_sig_fault when the
signal is SIGKILL.

Cc: stable@xxxxxxxxxxxxxxx
Cc: Dave Martin <Dave.Martin@xxxxxxx>
Cc: James Morse <james.morse@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Fixes: af40ff687bc9 ("arm64: signal: Ensure si_code is valid for all fault signals")
Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
---
 arch/arm64/kernel/traps.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index ade32046f3fe..0feb17bdcaa0 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -282,6 +282,11 @@ void arm64_notify_die(const char *str, struct pt_regs *regs,
 		current->thread.fault_address = 0;
 		current->thread.fault_code = err;
 
+		if (signo == SIGKILL) {
+			arm64_show_signal(signo, str);
+			force_sig(signo, current);
+			return;
+		}
 		arm64_force_sig_fault(signo, sicode, addr, str);
 	} else {
 		die(str, regs, err);
-- 
2.21.0