[PATCH 08/16] objtool: Fix SEGFAULT

From: Sathvika Vasireddy
Date: Mon Aug 08 2022 - 07:51:09 EST


From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>

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

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
---
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 0cec74da7ffe..0ef805843d4f 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -205,7 +205,7 @@ 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