From: Helge Deller <deller@gmx.de>
Date: Wed, 24 May 2023 12:31:14 +0000 (+0200)
Subject: parisc: Handle kprobes breakpoints only in kernel context
X-Git-Tag: baikal/aarch64/sdk6.2~84
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=d050d3c11b24a4668a4430a7b616917410f8d932;p=kernel.git

parisc: Handle kprobes breakpoints only in kernel context

commit df419492e428b6a2bce98d0f613c58a13da6666c upstream.

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

Cc: <stable@vger.kernel.org> # v5.18+
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 dff447f700421..67b51841dc8b4 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -291,11 +291,11 @@ static void handle_break(struct pt_regs *regs)
 	}
 
 #ifdef CONFIG_KPROBES
-	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN)) {
+	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN && !user_mode(regs))) {
 		parisc_kprobe_break_handler(regs);
 		return;
 	}
-	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN2)) {
+	if (unlikely(iir == PARISC_KPROBES_BREAK_INSN2 && !user_mode(regs))) {
 		parisc_kprobe_ss_handler(regs);
 		return;
 	}