Commit 9fefaaa3 authored Mar 06, 2017 by Prasad Sodagudi Committed by Gerrit - the friendly Code Review server Jul 10, 2017

arm64: Remove orig_addr_limit check in do_page_fault



Remove the orig_addr_limit check against KERNEL_DS in
do_page_fault handler for permissions faults. This
check is part of UAO and PAN features and these features
are disabled by default.

Change-Id: I5de760b983edcf14d1c0bee2a53dc091ceca31da
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>

parent b2cc7110

arch/arm64/mm/fault.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -257,10 +257,6 @@ static int __kprobes do_page_fault(unsigned long addr, unsigned int esr,
		}

		if (addr < USER_DS && is_permission_fault(esr, regs)) {
		/* regs->orig_addr_limit may be 0 if we entered from EL0 */
		if (regs->orig_addr_limit == KERNEL_DS)
		die("Accessing user space memory with fs=KERNEL_DS", regs, esr);

		if (is_el1_instruction_abort(esr))
		die("Attempting to execute userspace memory", regs, esr);