Prohibit probing on func_ptr_is_kernel_text() by adding it to the kprobe_blacklist. 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. Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@xxxxxxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: "Uwe Kleine-König" <u.kleine-koenig@xxxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> --- kernel/extable.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/extable.c b/kernel/extable.c index 832cb28..885c877 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -20,6 +20,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/init.h> +#include <linux/kprobes.h> #include <asm/sections.h> #include <asm/uaccess.h> @@ -137,3 +138,4 @@ int func_ptr_is_kernel_text(void *ptr) return 1; return is_module_text_address(addr); } +NOKPROBE_SYMBOL(func_ptr_is_kernel_text); _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
