From: Krzesimir Nowak <krzesimir@kinvolk.io>
To: bpf@vger.kernel.org
Cc: iago@kinvolk.io, alban@kinvolk.io,
Krzesimir Nowak <krzesimir@kinvolk.io>,
Jakub Kicinski <jakub.kicinski@netronome.com>,
Shuah Khan <shuah@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>, Andrey Ignatov <rdna@fb.com>,
Jiong Wang <jiong.wang@netronome.com>,
linux-kselftest@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH bpf v1 3/3] selftests/bpf: Avoid a clobbering of errno
Date: Wed, 15 May 2019 15:47:28 +0200 [thread overview]
Message-ID: <20190515134731.12611-4-krzesimir@kinvolk.io> (raw)
In-Reply-To: <20190515134731.12611-1-krzesimir@kinvolk.io>
Save errno right after bpf_prog_test_run returns, so we later check
the error code actually set by bpf_prog_test_run, not by some libcap
function.
Cc: Jakub Kicinski <jakub.kicinski@netronome.com>
Fixes: 5a8d5209ac022 ("selftests: bpf: add trivial JSET tests")
Signed-off-by: Krzesimir Nowak <krzesimir@kinvolk.io>
---
tools/testing/selftests/bpf/test_verifier.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/test_verifier.c b/tools/testing/selftests/bpf/test_verifier.c
index bf0da03f593b..514e17246396 100644
--- a/tools/testing/selftests/bpf/test_verifier.c
+++ b/tools/testing/selftests/bpf/test_verifier.c
@@ -818,15 +818,17 @@ static int do_prog_test_run(int fd_prog, bool unpriv, uint32_t expected_val,
__u32 size_tmp = sizeof(tmp);
uint32_t retval;
int err;
+ int saved_errno;
if (unpriv)
set_admin(true);
err = bpf_prog_test_run(fd_prog, 1, data, size_data,
tmp, &size_tmp, &retval, NULL);
+ saved_errno = errno;
if (unpriv)
set_admin(false);
if (err) {
- switch (errno) {
+ switch (saved_errno) {
case 524/*ENOTSUPP*/:
printf("Did not run the program (not supported) ");
return 0;
--
2.20.1
next prev parent reply other threads:[~2019-05-15 13:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-15 13:47 [PATCH bpf v1 0/3] Test the 32bit narrow reads Krzesimir Nowak
2019-05-15 13:47 ` [PATCH bpf v1 1/3] selftests/bpf: Test correctness of narrow 32bit read on 64bit field Krzesimir Nowak
2019-05-23 16:02 ` Daniel Borkmann
2019-05-15 13:47 ` [PATCH bpf v1 2/3] selftests/bpf: Print a message when tester could not run a program Krzesimir Nowak
2019-05-15 21:45 ` Jakub Kicinski
2019-05-16 9:29 ` Krzesimir Nowak
2019-05-16 15:50 ` Jakub Kicinski
2019-05-16 16:21 ` Krzesimir Nowak
2019-05-16 16:54 ` Jakub Kicinski
2019-05-15 13:47 ` Krzesimir Nowak [this message]
2019-05-15 21:50 ` [PATCH bpf v1 3/3] selftests/bpf: Avoid a clobbering of errno Jakub Kicinski
2019-05-16 9:31 ` Krzesimir Nowak
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