From: Andrii Nakryiko <andrii.nakryiko@gmail.com>
To: Yafang Shao <laoar.shao@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
"linux-perf-use." <linux-perf-users@vger.kernel.org>,
linux-fsdevel@vger.kernel.org,
Linux Memory Management List <linux-mm@kvack.org>,
open list <linux-kernel@vger.kernel.org>,
kernel test robot <oliver.sang@intel.com>,
kbuild test robot <lkp@intel.com>,
Kees Cook <keescook@chromium.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Michal Miroslaw <mirq-linux@rere.qmqm.pl>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Matthew Wilcox <willy@infradead.org>,
David Hildenbrand <david@redhat.com>,
Al Viro <viro@zeniv.linux.org.uk>, Petr Mladek <pmladek@suse.com>
Subject: Re: [PATCH 5/7] samples/bpf/test_overhead_kprobe_kern: make it adopt to task comm size change
Date: Mon, 8 Nov 2021 10:20:44 -0800 [thread overview]
Message-ID: <CAEf4BzYn3PwjhjzWV8oPD3A8ozLN_Y4ef7xAHW+oECOMgtMgcA@mail.gmail.com> (raw)
In-Reply-To: <20211108083840.4627-6-laoar.shao@gmail.com>
On Mon, Nov 8, 2021 at 12:39 AM Yafang Shao <laoar.shao@gmail.com> wrote:
>
> bpf_probe_read_kernel_str() will add a nul terminator to the dst, then
> we don't care about if the dst size is big enough. This patch also
> replaces the hard-coded 16 with TASK_COMM_LEN to make it adopt to task
> comm size change.
>
> Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
> Reviewed-by: Kees Cook <keescook@chromium.org>
> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> Cc: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
> Cc: Andrii Nakryiko <andrii.nakryiko@gmail.com>
> Cc: Michal Miroslaw <mirq-linux@rere.qmqm.pl>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Steven Rostedt <rostedt@goodmis.org>
> Cc: Matthew Wilcox <willy@infradead.org>
> Cc: David Hildenbrand <david@redhat.com>
> Cc: Al Viro <viro@zeniv.linux.org.uk>
> Cc: Kees Cook <keescook@chromium.org>
> Cc: Petr Mladek <pmladek@suse.com>
> ---
LGTM.
Acked-by: Andrii Nakryiko <andrii@kernel.org>
> samples/bpf/offwaketime_kern.c | 4 ++--
> samples/bpf/test_overhead_kprobe_kern.c | 11 ++++++-----
> samples/bpf/test_overhead_tp_kern.c | 5 +++--
> 3 files changed, 11 insertions(+), 9 deletions(-)
>
[...]
next prev parent reply other threads:[~2021-11-08 18:20 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-08 8:38 [PATCH 0/7] task comm cleanups Yafang Shao
2021-11-08 8:38 ` [PATCH 1/7] fs/exec: make __set_task_comm always set a nul terminated string Yafang Shao
2021-11-10 8:28 ` David Hildenbrand
2021-11-10 9:05 ` Yafang Shao
2021-11-11 9:58 ` David Hildenbrand
2021-11-10 20:17 ` Kees Cook
2021-11-08 8:38 ` [PATCH 2/7] fs/exec: make __get_task_comm always get " Yafang Shao
2021-11-11 9:59 ` David Hildenbrand
2021-11-08 8:38 ` [PATCH 3/7] drivers/infiniband: use get_task_comm instead of open-coded string copy Yafang Shao
2021-11-11 10:01 ` David Hildenbrand
2021-11-08 8:38 ` [PATCH 4/7] fs/binfmt_elf: " Yafang Shao
2021-11-11 10:03 ` David Hildenbrand
2021-11-11 10:06 ` David Hildenbrand
2021-11-11 11:34 ` Petr Mladek
2021-11-11 11:47 ` David Hildenbrand
2021-11-12 1:08 ` Yafang Shao
2021-11-12 1:03 ` Yafang Shao
2021-11-08 8:38 ` [PATCH 5/7] samples/bpf/test_overhead_kprobe_kern: make it adopt to task comm size change Yafang Shao
2021-11-08 18:20 ` Andrii Nakryiko [this message]
2021-11-11 10:07 ` David Hildenbrand
2021-11-08 8:38 ` [PATCH 6/7] tools/bpf/bpftool/skeleton: use bpf_probe_read_kernel_str to get task comm Yafang Shao
2021-11-11 10:08 ` David Hildenbrand
2021-11-08 8:38 ` [PATCH 7/7] tools/testing/selftests/bpf: make it adopt to task comm size change Yafang Shao
2021-11-11 10:11 ` David Hildenbrand
2021-11-09 18:28 ` [PATCH 0/7] task comm cleanups Kees Cook
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