On Fri, 01 Nov 2013 11:25:37 +0000 Masami Hiramatsu <[email protected]> wrote:
> Prohibit probing on func_ptr_is_kernel_text(). > Since the func_ptr_is_kernel_text() is called from > notifier_call_chain() which is called from int3 handler, > probing it may cause double int3 fault and kernel will > reboot. > > This happenes when the kernel built with CONFIG_DEBUG_NOTIFIERS=y. Reviewed-by: Steven Rostedt <[email protected]> -- Steve > > Signed-off-by: Masami Hiramatsu <[email protected]> > Cc: Andrew Morton <[email protected]> > Cc: "Uwe Kleine-König" <[email protected]> > Cc: Borislav Petkov <[email protected]> > Cc: Ingo Molnar <[email protected]> > --- > kernel/extable.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/extable.c b/kernel/extable.c > index 832cb28..022fb25 100644 > --- a/kernel/extable.c > +++ b/kernel/extable.c > @@ -129,7 +129,7 @@ int kernel_text_address(unsigned long addr) > * pointer is part of the kernel text, we need to do some > * special dereferencing first. > */ > -int func_ptr_is_kernel_text(void *ptr) > +int nokprobe func_ptr_is_kernel_text(void *ptr) > { > unsigned long addr; > addr = (unsigned long) dereference_function_descriptor(ptr); > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
