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authorMark Rutland <mark.rutland@arm.com>2013-05-28 15:54:15 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2013-05-31 16:04:51 +0100
commit9955ac47f4ba1c95ecb6092aeaefb40a22e99268 (patch)
treec875695e3bba3d45cea40678671b6bb6b67e6d76 /arch
parent381cc2b9705512ee7c7f1839cbdde374625a2a9f (diff)
downloadlinux-9955ac47f4ba1c95ecb6092aeaefb40a22e99268.tar.gz
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 <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/kernel/traps.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index f1ff9bad00f..f30852d2859 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);
+
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = ILL_ILLOPC;
+ info.si_addr = pc;
- die("Oops - bad mode", regs, 0);
- local_irq_disable();
- panic("bad mode");
+ arm64_notify_die("Oops - bad mode", regs, &info, 0);
}
void __pte_error(const char *file, int line, unsigned long val)