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Date: Sat, 4 May 2024 19:09:16 +0200
From: Amer Al Shanawany <amer.shanawany@...il.com>
To: Shuah Khan <shuah@...nel.org>,
Muhammad Usama Anjum <usama.anjum@...labora.com>,
Swarup Laxman Kotiaklapudi <swarupkotikalapudi@...il.com>
Cc: linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org,
Javier Carrasco <javier.carrasco.cruz@...il.com>,
Amer Al Shanawany <amer.shanawany@...il.com>
Subject: [PATCH] selftests/capabilities: fix warn_unused_result build warnings
Fix the following warnings by adding return check and error handling.
test_execve.c: In function ‘do_tests’:
test_execve.c:100:17: warning: ignoring return value of
‘capng_get_caps_process’
declared with attribute ‘warn_unused_result’ [-Wunused-result]
100 | capng_get_caps_process();
| ^~~~~~~~~~~~~~~~~~~~~~~~
validate_cap.c: In function ‘main’:
validate_cap.c:47:9: warning: ignoring return value of
‘capng_get_caps_process’
declared with attribute ‘warn_unused_result’ [-Wunused-result]
47 | capng_get_caps_process();
| ^~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Amer Al Shanawany <amer.shanawany@...il.com>
---
tools/testing/selftests/capabilities/test_execve.c | 12 +++++++++---
tools/testing/selftests/capabilities/validate_cap.c | 7 ++++++-
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/tools/testing/selftests/capabilities/test_execve.c b/tools/testing/selftests/capabilities/test_execve.c
index 7cde07a5df78..47bad7ddc5bc 100644
--- a/tools/testing/selftests/capabilities/test_execve.c
+++ b/tools/testing/selftests/capabilities/test_execve.c
@@ -82,7 +82,7 @@ static bool create_and_enter_ns(uid_t inner_uid)
{
uid_t outer_uid;
gid_t outer_gid;
- int i;
+ int i, ret;
bool have_outer_privilege;
outer_uid = getuid();
@@ -97,7 +97,10 @@ static bool create_and_enter_ns(uid_t inner_uid)
ksft_exit_fail_msg("setresuid - %s\n", strerror(errno));
// Re-enable effective caps
- capng_get_caps_process();
+ ret = capng_get_caps_process();
+ if (ret == -1)
+ ksft_exit_fail_msg("capng_get_caps_process failed\n");
+
for (i = 0; i < CAP_LAST_CAP; i++)
if (capng_have_capability(CAPNG_PERMITTED, i))
capng_update(CAPNG_ADD, CAPNG_EFFECTIVE, i);
@@ -207,6 +210,7 @@ static void exec_validate_cap(bool eff, bool perm, bool inh, bool ambient)
static int do_tests(int uid, const char *our_path)
{
+ int ret;
bool have_outer_privilege = create_and_enter_ns(uid);
int ourpath_fd = open(our_path, O_RDONLY | O_DIRECTORY);
@@ -250,7 +254,9 @@ static int do_tests(int uid, const char *our_path)
ksft_exit_fail_msg("chmod - %s\n", strerror(errno));
}
- capng_get_caps_process();
+ ret = capng_get_caps_process();
+ if (ret == -1)
+ ksft_exit_fail_msg("capng_get_caps_process failed\n");
/* Make sure that i starts out clear */
capng_update(CAPNG_DROP, CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE);
diff --git a/tools/testing/selftests/capabilities/validate_cap.c b/tools/testing/selftests/capabilities/validate_cap.c
index 60b4e7b716a7..65f2a1c89239 100644
--- a/tools/testing/selftests/capabilities/validate_cap.c
+++ b/tools/testing/selftests/capabilities/validate_cap.c
@@ -28,6 +28,7 @@ static bool bool_arg(char **argv, int i)
int main(int argc, char **argv)
{
const char *atsec = "";
+ int ret;
/*
* Be careful just in case a setgid or setcapped copy of this
@@ -44,7 +45,11 @@ int main(int argc, char **argv)
atsec = " (AT_SECURE is not set)";
#endif
- capng_get_caps_process();
+ ret = capng_get_caps_process();
+ if (ret == -1) {
+ ksft_print_msg("capng_get_caps_process failed\n");
+ return 1;
+ }
if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
ksft_print_msg("Wrong effective state%s\n", atsec);
--
2.43.0
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