[PATCH] objtool: Fix memory leak in create_static_call_sections

From: Miaoqian Lin
Date: Mon Dec 05 2022 - 03:07:05 EST


strdup() allocates memory for key_name. We need to release the memory in
the following error paths. Add free to avoid memory leak.

Fixes: 1e7e47883830 ("x86/static_call: Add inline static call implementation for x86-64")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
---
tools/objtool/check.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 43ec14c29a60..55ce695017f8 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -668,6 +668,7 @@ static int create_static_call_sections(struct objtool_file *file)
if (strncmp(key_name, STATIC_CALL_TRAMP_PREFIX_STR,
STATIC_CALL_TRAMP_PREFIX_LEN)) {
WARN("static_call: trampoline name malformed: %s", key_name);
+ free(key_name);
return -1;
}
tmp = key_name + STATIC_CALL_TRAMP_PREFIX_LEN - STATIC_CALL_KEY_PREFIX_LEN;
@@ -677,6 +678,7 @@ static int create_static_call_sections(struct objtool_file *file)
if (!key_sym) {
if (!opts.module) {
WARN("static_call: can't find static_call_key symbol: %s", tmp);
+ free(key_name);
return -1;
}

--
2.25.1