x86_64-no_context_hook.patch From: Jason Wessel CC: ak@suse.de Subject: [PATCH] This adds a call to notify_die() A call to notify_die is added in the "no context" portion of do_page_fault() as someone on the chain might care and want to do a fixup. Signed-off-by: Tom Rini Signed-off-by: Jason Wessel --- arch/x86/mm/fault_64.c | 4 ++++ include/asm-x86/kdebug_64.h | 1 + 2 files changed, 5 insertions(+) --- a/arch/x86/mm/fault_64.c +++ b/arch/x86/mm/fault_64.c @@ -531,6 +531,10 @@ no_context: if (is_errata93(regs, address)) return; + if (notify_die(DIE_PAGE_FAULT_NO_CONTEXT, "no context", regs, + error_code, 14, SIGSEGV) == NOTIFY_STOP) + return; + /* * Oops. The kernel tried to access some bad page. We'll have to * terminate things with extreme prejudice. --- a/include/asm-x86/kdebug_64.h +++ b/include/asm-x86/kdebug_64.h @@ -23,6 +23,7 @@ enum die_val { DIE_CALL, DIE_NMI_IPI, DIE_PAGE_FAULT, + DIE_PAGE_FAULT_NO_CONTEXT, }; extern void printk_address(unsigned long address);