On Fri, Jun 18, 2021 at 9:49 AM Arnaldo Carvalho de Melo
<acme@xxxxxxxxxx> wrote:
>
> Em Thu, Jun 17, 2021 at 04:19:06PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Thu, Jun 17, 2021 at 11:42:14AM -0700, Ian Rogers escreveu:
> > > Having a verbose option will allow shell tests to provide extra failure
> > > details when the fail or skip.
> >
> >
> > Thanks, applied to perf/core.
> >
> > - Arnaldo
> >
> > > Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
> > > ---
> > > tools/perf/tests/builtin-test.c | 5 ++++-
> > > 1 file changed, 4 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> > > index cbbfe48ab802..a8160b1684de 100644
> > > --- a/tools/perf/tests/builtin-test.c
> > > +++ b/tools/perf/tests/builtin-test.c
> > > @@ -577,11 +577,14 @@ struct shell_test {
> > > static int shell_test__run(struct test *test, int subdir __maybe_unused)
> > > {
> > > int err;
> > > - char script[PATH_MAX];
> > > + char script[PATH_MAX + 3];
> > > struct shell_test *st = test->priv;
> > >
> > > path__join(script, sizeof(script), st->dir, st->file);
>
> probably you need to add a '- 3' after the sizeof above, right?
Either way is fine, but -3 is ok with me.
> > >
> > > + if (verbose)
> > > + strncat(script, " -v", sizeof(script));
> > > +
>
> Seemed simple enough, but gcc knows better, I'm removing this one:
>
> tests/builtin-test.c:586:26: error: the value of the size argument in 'strncat' is too large, might lead to a buffer overflow [-Werror,-Wstrncat-size]
> strncat(script, " -v", sizeof(script));
> ^~~~~~~~~~~~~~
> tests/builtin-test.c:586:26: note: change the argument to be the free space in the destination buffer minus the terminating null byte
> strncat(script, " -v", sizeof(script));
> ^~~~~~~~~~~~~~
> sizeof(script) - strlen(script) - 1
> 1 error generated.
> make[3]: *** [/git/perf-5.13.0-rc4/tools/build/Makefile.build:139: tests] Error 2
> 77 31.98 ubuntu:21.04 : FAIL gcc version 10.3.0 (Ubuntu 10.3.0-1ubuntu1)
> tests/builtin-test.c:586:26: error: the value of the size argument in 'strncat' is too large, might lead to a buffer overflow [-Werror,-Wstrncat-size]
> strncat(script, " -v", sizeof(script));
> ^~~~~~~~~~~~~~
> tests/builtin-test.c:586:26: note: change the argument to be the free space in the destination buffer minus the terminating null byte
> strncat(script, " -v", sizeof(script));
> ^~~~~~~~~~~~~~
> sizeof(script) - strlen(script) - 1
> 1 error generated.
> make[3]: *** [/git/perf-5.13.0-rc4/tools/build/Makefile.build:139: tests] Error 2
Thanks gcc :-) Do you want me to resend the patch?
Ian
> > > err = system(script);
> > > if (!err)
> > > return TEST_OK;
> > > --
> > > 2.32.0.288.g62a8d224e6-goog
> > >
> >
> > --
> >
> > - Arnaldo
>
> --
>
> - Arnaldo
