From 9955ac47f4ba1c95ecb6092aeaefb40a22e99268 Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Tue, 28 May 2013 15:54:15 +0100 Subject: [PATCH] arm64: don't kill the kernel on a bad esr from el0 Rather than completely killing the kernel if we receive an esr value we can't deal with in the el0 handlers, send the process a SIGILL and log the esr value in the hope that we can debug it. If we receive a bad esr from el1, we'll die() as before. Signed-off-by: Mark Rutland Signed-off-by: Catalin Marinas Cc: stable@vger.kernel.org --- arch/arm64/kernel/traps.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index f1ff9bad00f7..f30852d28590 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -311,14 +311,20 @@ asmlinkage long do_ni_syscall(struct pt_regs *regs) */ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr) { + siginfo_t info; + void __user *pc = (void __user *)instruction_pointer(regs); console_verbose(); pr_crit("Bad mode in %s handler detected, code 0x%08x\n", handler[reason], esr); + __show_regs(regs); - die("Oops - bad mode", regs, 0); - local_irq_disable(); - panic("bad mode"); + info.si_signo = SIGILL; + info.si_errno = 0; + info.si_code = ILL_ILLOPC; + info.si_addr = pc; + + arm64_notify_die("Oops - bad mode", regs, &info, 0); } void __pte_error(const char *file, int line, unsigned long val)