From: Helge Deller <deller@gmx.de>
Date: Wed, 24 May 2023 12:34:58 +0000 (+0200)
Subject: parisc: Handle kgdb breakpoints only in kernel context
X-Git-Tag: baikal/aarch64/sdk5.10~33
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=569132e98117e6628f1bd4dcc090fe9ad548f7cf;p=kernel.git

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 37988f7f3abcb..10776991296a0 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -305,8 +305,8 @@ 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;
 	}