Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

Pull siginfo updates from Eric Biederman:
 "This set of changes close the known issues with setting si_code to an
  invalid value, and with not fully initializing struct siginfo. There
  remains work to do on nds32, arc, unicore32, powerpc, arm, arm64, ia64
  and x86 to get the code that generates siginfo into a simpler and more
  maintainable state. Most of that work involves refactoring the signal
  handling code and thus careful code review.

  Also not included is the work to shrink the in kernel version of
  struct siginfo. That depends on getting the number of places that
  directly manipulate struct siginfo under control, as it requires the
  introduction of struct kernel_siginfo for the in kernel things.

  Overall this set of changes looks like it is making good progress, and
  with a little luck I will be wrapping up the siginfo work next
  development cycle"

* 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (46 commits)
  signal/sh: Stop gcc warning about an impossible case in do_divide_error
  signal/mips: Report FPE_FLTUNK for undiagnosed floating point exceptions
  signal/um: More carefully relay signals in relay_signal.
  signal: Extend siginfo_layout with SIL_FAULT_{MCEERR|BNDERR|PKUERR}
  signal: Remove unncessary #ifdef SEGV_PKUERR in 32bit compat code
  signal/signalfd: Add support for SIGSYS
  signal/signalfd: Remove __put_user from signalfd_copyinfo
  signal/xtensa: Use force_sig_fault where appropriate
  signal/xtensa: Consistenly use SIGBUS in do_unaligned_user
  signal/um: Use force_sig_fault where appropriate
  signal/sparc: Use force_sig_fault where appropriate
  signal/sparc: Use send_sig_fault where appropriate
  signal/sh: Use force_sig_fault where appropriate
  signal/s390: Use force_sig_fault where appropriate
  signal/riscv: Replace do_trap_siginfo with force_sig_fault
  signal/riscv: Use force_sig_fault where appropriate
  signal/parisc: Use force_sig_fault where appropriate
  signal/parisc: Use force_sig_mceerr where appropriate
  signal/openrisc: Use force_sig_fault where appropriate
  signal/nios2: Use force_sig_fault where appropriate
  ...

2 files changed, 9 insertions, 20 deletions

diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c
index 2942a9204a9a..91ee04842c22 100644
--- a/arch/hexagon/kernel/traps.c
+++ b/arch/hexagon/kernel/traps.c
@@ -412,10 +412,6 @@ void do_trap0(struct pt_regs *regs)
 	case TRAP_DEBUG:
 		/* Trap0 0xdb is debug breakpoint */
 		if (user_mode(regs)) {
-			struct siginfo info;
-
-			info.si_signo = SIGTRAP;
-			info.si_errno = 0;
 			/*
 			 * Some architecures add some per-thread state
 			 * to distinguish between breakpoint traps and
@@ -423,9 +419,8 @@ void do_trap0(struct pt_regs *regs)
 			 * set the si_code value appropriately, or we
 			 * may want to use a different trap0 flavor.
 			 */
-			info.si_code = TRAP_BRKPT;
-			info.si_addr = (void __user *) pt_elr(regs);
-			force_sig_info(SIGTRAP, &info, current);
+			force_sig_fault(SIGTRAP, TRAP_BRKPT,
+					(void __user *) pt_elr(regs), current);
 		} else {
 #ifdef CONFIG_KGDB
 			kgdb_handle_exception(pt_cause(regs), SIGTRAP,
diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c
index 3eec33c5cfd7..933bbcef5363 100644
--- a/arch/hexagon/mm/vm_fault.c
+++ b/arch/hexagon/mm/vm_fault.c
@@ -50,7 +50,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs)
 {
 	struct vm_area_struct *vma;
 	struct mm_struct *mm = current->mm;
-	siginfo_t info;
+	int si_signo;
 	int si_code = SEGV_MAPERR;
 	int fault;
 	const struct exception_table_entry *fixup;
@@ -140,28 +140,22 @@ good_area:
 	 * unable to fix up the page fault.
 	 */
 	if (fault & VM_FAULT_SIGBUS) {
-		info.si_signo = SIGBUS;
-		info.si_code = BUS_ADRERR;
+		si_signo = SIGBUS;
+		si_code = BUS_ADRERR;
 	}
 	/* Address is not in the memory map */
 	else {
-		info.si_signo = SIGSEGV;
-		info.si_code = SEGV_ACCERR;
+		si_signo = SIGSEGV;
+		si_code  = SEGV_ACCERR;
 	}
-	info.si_errno = 0;
-	info.si_addr = (void __user *)address;
-	force_sig_info(info.si_signo, &info, current);
+	force_sig_fault(si_signo, si_code, (void __user *)address, current);
 	return;
 
 bad_area:
 	up_read(&mm->mmap_sem);
 
 	if (user_mode(regs)) {
-		info.si_signo = SIGSEGV;
-		info.si_errno = 0;
-		info.si_code = si_code;
-		info.si_addr = (void *)address;
-		force_sig_info(info.si_signo, &info, current);
+		force_sig_fault(SIGSEGV, si_code, (void __user *)address, current);
 		return;
 	}
 	/* Kernel-mode fault falls through */