Commit af6bfcd1 authored by Heiko Carstens's avatar Heiko Carstens Committed by Vasily Gorbik
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s390/mm: Dump fault info in case of low address protection fault 



In case of an unexpected low address protection fault in user mode dump
fault info to make debugging a bit easier. At least the teid is valid,
while dumping the page table is racy, since no lock is held.
But it might still give some hints.

Acked-by: default avatarVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 1018424a

arch/s390/mm/fault.c

+1 −0
Original line number Diff line number Diff line
@@ -376,6 +376,7 @@ void do_protection_exception(struct pt_regs *regs) 
	if (unlikely(!teid.b61)) {

		if (user_mode(regs)) {

			/* Low-address protection in user mode: cannot happen */

			dump_fault_info(regs);

			die(regs, "Low-address protection");

		}

		/*