Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 953dbbed authored by Catalin Marinas's avatar Catalin Marinas
Browse files

arm64: Do not report user faults for handled signals 



Currently user faults (page, undefined instruction) are always reported
even though the user may have a signal handler for them. This patch adds
unhandled_signal() check together with printk_ratelimit() for these
cases.

Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 726dcaa1

arch/arm64/kernel/traps.c

+3 −2
Original line number Diff line number Diff line
@@ -267,7 +267,8 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs) 
		return;

#endif



	if (show_unhandled_signals) {

	if (show_unhandled_signals && unhandled_signal(current, SIGILL) &&

	    printk_ratelimit()) {

		pr_info("%s[%d]: undefined instruction: pc=%p\n",

			current->comm, task_pid_nr(current), pc);

		dump_instr(KERN_INFO, regs);
@@ -294,7 +295,7 @@ asmlinkage long do_ni_syscall(struct pt_regs *regs) 
	}

#endif



	if (show_unhandled_signals) {

	if (show_unhandled_signals && printk_ratelimit()) {

		pr_info("%s[%d]: syscall %d\n", current->comm,

			task_pid_nr(current), (int)regs->syscallno);

		dump_instr("", regs);

arch/arm64/mm/fault.c

+2 −1
Original line number Diff line number Diff line
@@ -113,7 +113,8 @@ static void __do_user_fault(struct task_struct *tsk, unsigned long addr, 
{

	struct siginfo si;



	if (show_unhandled_signals) {

	if (show_unhandled_signals && unhandled_signal(tsk, sig) &&

	    printk_ratelimit()) {

		pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n",

			tsk->comm, task_pid_nr(tsk), fault_name(esr), sig,

			addr, esr);