lkml.org 
[lkml]   [2019]   [May]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH bpf v1 3/3] selftests/bpf: Avoid a clobbering of errno
On Wed, May 15, 2019 at 11:51 PM Jakub Kicinski
<jakub.kicinski@netronome.com> wrote:
>
> On Wed, 15 May 2019 15:47:28 +0200, Krzesimir Nowak wrote:
> > 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")
>
> This commit (of mine) just moved this code into a helper, the bug is
> older:
>
> Fixes: 832c6f2c29ec ("bpf: test make sure to run unpriv test cases in test_verifier")

Oops, ok. Will fix it. Thanks.

>
> > 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;
>


--
Kinvolk GmbH | Adalbertstr.6a, 10999 Berlin | tel: +491755589364
Geschäftsführer/Directors: Alban Crequy, Chris Kühl, Iago López Galeiras
Registergericht/Court of registration: Amtsgericht Charlottenburg
Registernummer/Registration number: HRB 171414 B
Ust-ID-Nummer/VAT ID number: DE302207000

\
 
 \ /
  Last update: 2019-05-16 11:31    [W:0.036 / U:22.080 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site