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From:   Tiezhu Yang <yangtiezhu@loongson.cn>
To:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Masami Hiramatsu <mhiramat@kernel.org>
Cc:     linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] riscv: kprobes: Free instruction in arch_remove_kprobe()
Date:   Thu,  8 Sep 2022 09:39:16 +0800
Message-Id: <1662601156-25802-1-git-send-email-yangtiezhu@loongson.cn>
Precedence: bulk

Call free_insn_slot() to free instruction in arch_remove_kprobe()
as other arches do.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
 arch/riscv/kernel/probes/kprobes.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/riscv/kernel/probes/kprobes.c b/arch/riscv/kernel/probes/kprobes.c
index e6e950b..f12eb1f 100644
--- a/arch/riscv/kernel/probes/kprobes.c
+++ b/arch/riscv/kernel/probes/kprobes.c
@@ -110,6 +110,10 @@ void __kprobes arch_disarm_kprobe(struct kprobe *p)
 
 void __kprobes arch_remove_kprobe(struct kprobe *p)
 {
+	if (p->ainsn.api.insn) {
+		free_insn_slot(p->ainsn.api.insn, 0);
+		p->ainsn.api.insn = NULL;
+	}
 }
 
 static void __kprobes save_previous_kprobe(struct kprobe_ctlblk *kcb)
-- 
2.1.0