parisc: Handle kgdb breakpoints only in kernel context

commit 6888ff04e37d01295620a73f3f7efbc79f6ef152 upstream.

The kernel kgdb break instructions should only be handled when running
in kernel context.

Cc: <stable@vger.kernel.org> # v5.4+
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index f9696fbf646c473cffbe26f316b1bcd289054431..dff447f700421e04919e27fffcf8c6e2a0a5c741 100644 (file)
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -302,8 +302,8 @@ static void handle_break(struct pt_regs *regs)
 #endif
 
 #ifdef CONFIG_KGDB
-       if (unlikely(iir == PARISC_KGDB_COMPILED_BREAK_INSN ||
-               iir == PARISC_KGDB_BREAK_INSN)) {
+       if (unlikely((iir == PARISC_KGDB_COMPILED_BREAK_INSN ||
+               iir == PARISC_KGDB_BREAK_INSN)) && !user_mode(regs)) {
                kgdb_handle_exception(9, SIGTRAP, 0, regs);
                return;
        }