Subject: [PATCH v3 08/16] objtool: Fix SEGFAULT

From: Sathvika Vasireddy <[email-masked]>
Date: Mon, 12 Sep 2022 13:50:12 +0530

From: Christophe Leroy <[email-masked]>

find_insn() will return NULL in case of failure. Check insn in order
to avoid a kernel Oops for NULL pointer dereference.

Acked-by: Peter Zijlstra (Intel) <[email-masked]>
Signed-off-by: Christophe Leroy <[email-masked]>
---
 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 e55fdf952a3a..fe935f19447b 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -207,7 +207,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
 		return false;
 
 	insn = find_insn(file, func->sec, func->offset);
-	if (!insn->func)
+	if (!insn || !insn->func)
 		return false;
 
 	func_for_each_insn(file, func, insn) {
-- 
2.31.1