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| author | Mark Rutland <mark.rutland@arm.com> | 2013-05-28 18:54:15 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-05-31 19:04:51 +0400 |
| commit | 9955ac47f4ba1c95ecb6092aeaefb40a22e99268 (patch) | |
| tree | c875695e3bba3d45cea40678671b6bb6b67e6d76 | |
| parent | 381cc2b9705512ee7c7f1839cbdde374625a2a9f (diff) | |
| download | linux-9955ac47f4ba1c95ecb6092aeaefb40a22e99268.tar.xz | |
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
| -rw-r--r-- | arch/arm64/kernel/traps.c | 12 |
1 files 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); + + 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) |