Received-SPF: pass (google.com: domain of linux-kernel+bounces-84444-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1;
From: Rui Qi <qirui.001@bytedance.com>
To: bp@alien8.de,
	mingo@redhat.com,
	tglx@linutronix.de,
	hpa@zytor.com,
	jpoimboe@redhat.com,
	peterz@infradead.org,
	mbenes@suse.cz,
	gregkh@linuxfoundation.org,
	stable@vger.kernel.org,
	alexandre.chartre@oracle.com
Cc: x86@kernel.org,
	linux-kernel@vger.kernel.org,
	yuanzhu@bytedance.com,
	Rui Qi <qirui.001@bytedance.com>
Subject: [PATCH v2 1/3] objtool: is_fentry_call() crashes if call has no destination
Date: Wed, 28 Feb 2024 10:45:33 +0800
Message-Id: <20240228024535.79980-2-qirui.001@bytedance.com>
In-Reply-To: <20240228024535.79980-1-qirui.001@bytedance.com>
References: <20240228024535.79980-1-qirui.001@bytedance.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Alexandre Chartre <alexandre.chartre@oracle.com>

commit 87cf61fe848ca8ddf091548671e168f52e8a718e upstream.

Fix is_fentry_call() so that it works if a call has no destination
set (call_dest). This needs to be done in order to support intra-
function calls.

Signed-off-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lkml.kernel.org/r/20200414103618.12657-2-alexandre.chartre@oracle.com
Signed-off-by: Rui Qi <qirui.001@bytedance.com>
---
 tools/objtool/check.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index dfd67243faac..71a24fd46dbd 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -1367,7 +1367,7 @@ static int decode_sections(struct objtool_file *file)
 
 static bool is_fentry_call(struct instruction *insn)
 {
-	if (insn->type == INSN_CALL &&
+	if (insn->type == INSN_CALL && insn->call_dest &&
 	    insn->call_dest->type == STT_NOTYPE &&
 	    !strcmp(insn->call_dest->name, "__fentry__"))
 		return true;
-- 
2.39.2 (Apple Git-143)