linux-kernel - Re: [PATCH] selftests/kprobe: Do not test for GRP/ without event failures

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 18 Jul 2022 11:08:53 +0900
From:   Masami Hiramatsu (Google) <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Linyu Yuan <quic_linyyuan@...cinc.com>
Subject: Re: [PATCH] selftests/kprobe: Do not test for GRP/ without event
 failures

On Tue, 12 Jul 2022 16:17:07 -0400
Steven Rostedt <rostedt@...dmis.org> wrote:

> From: "Steven Rostedt (Google)" <rostedt@...dmis.org>
> 
> A new feature is added where kprobes (and other probes) do not need to
> explicitly state the event name when creating a probe. The event name will
> come from what is being attached.
> 
> That is:
> 
>   # echo 'p:foo/ vfs_read' > kprobe_events
> 
> Will no longer error, but instead create an event:
> 
>   # cat kprobe_events
>  p:foo/p_vfs_read_0 vfs_read
> 
> This should not be tested as an error case anymore. Remove it from the
> selftest as now this feature "breaks" the selftest as it no longer fails
> as expected.

Good catch!

Acked-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

BTW, in this case, NO_EVENT_NAME error should not happen anymore.
Let me cleanup the code.

Thank you,

> 
> Link: https://lore.kernel.org/all/1656296348-16111-1-git-send-email-quic_linyyuan@quicinc.com/
> 
> Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
> ---
>  .../selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc       | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
> index fa928b431555..7c02509c71d0 100644
> --- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
> +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc
> @@ -21,7 +21,6 @@ check_error 'p:^/bar vfs_read'		# NO_GROUP_NAME
>  check_error 'p:^12345678901234567890123456789012345678901234567890123456789012345/bar vfs_read'	# GROUP_TOO_LONG
>  
>  check_error 'p:^foo.1/bar vfs_read'	# BAD_GROUP_NAME
> -check_error 'p:foo/^ vfs_read'		# NO_EVENT_NAME
>  check_error 'p:foo/^12345678901234567890123456789012345678901234567890123456789012345 vfs_read'	# EVENT_TOO_LONG
>  check_error 'p:foo/^bar.1 vfs_read'	# BAD_EVENT_NAME
>  
> -- 
> 2.35.1
> 


-- 
Masami Hiramatsu (Google) <mhiramat@...nel.org>