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From: Helge Deller <deller@gmx.de>
To: linux-parisc@vger.kernel.org
Subject: [PATCH] parisc: Handle Kprobes and KGDB breakpoints only in kernel
Date: Mon, 22 May 2023 15:16:59 +0200	[thread overview]
Message-ID: <ZGtrS4jHUbWXWdTo@p100> (raw)

context
Reply-To:

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

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index f9696fbf646c..67b51841dc8b 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -291,19 +291,19 @@ 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;
 	}
 #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;
 	}

                 reply	other threads:[~2023-05-22 13:17 UTC|newest]

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