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From: cgel.zte@gmail.com
To: peterz@infradead.org
Cc: jpoimboe@redhat.com, jbaron@akamai.com, rostedt@goodmis.org,
	ardb@kernel.org, tglx@linutronix.de, mingo@redhat.com,
	bp@alien8.de, x86@kernel.org, hpa@zytor.com,
	linux-kernel@vger.kernel.org, Yang Guang <yang.guang5@zte.com.cn>
Subject: [PATCH] Add exception handling
Date: Sat, 18 Sep 2021 07:47:18 +0000	[thread overview]
Message-ID: <20210918074718.240511-1-yang.guang5@zte.com.cn> (raw)

From: Yang Guang <yang.guang5@zte.com.cn>

If the type is abnormal input from argument, the code will be NULL.
So it should return as default;

Signed-off-by: Yang Guang <yang.guang5@zte.com.cn>
---
 arch/x86/kernel/static_call.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/static_call.c b/arch/x86/kernel/static_call.c
index f608e6710300..696da3eccf28 100644
--- a/arch/x86/kernel/static_call.c
+++ b/arch/x86/kernel/static_call.c
@@ -45,6 +45,8 @@ static void __ref __static_call_transform(void *insn, enum insn_type type, void
 		code = text_gen_insn(RET_INSN_OPCODE, insn, func);
 		size = RET_INSN_SIZE;
 		break;
+	default:
+		return;
 	}
 
 	if (memcmp(insn, code, size) == 0)
-- 
2.25.1


             reply	other threads:[~2021-09-18  7:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-18  7:47 cgel.zte [this message]
2021-09-18  8:12 ` [PATCH] Add exception handling Peter Zijlstra

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