parisc: Try to fixup kernel exception in bad_area_nosemaphore path of do_page_fault()

commit f92a5e3 upstream.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org # v5.12+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: danglin44

arch/parisc/mm/fault.c

@@ -363,6 +363,10 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 	mmap_read_unlock(mm);
 
 bad_area_nosemaphore:
+	if (!user_mode(regs) && fixup_exception(regs)) {
+		return;
+	}
+
 	if (user_mode(regs)) {
 		int signo, si_code;