From: Steven Rostedt <rostedt@goodmis.org>
To: Alexander Popov <alex.popov@linux.com>
Cc: kernel-hardening@lists.openwall.com,
Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>,
Ingo Molnar <mingo@kernel.org>, Andy Lutomirski <luto@kernel.org>,
Joerg Roedel <joro@8bytes.org>, Borislav Petkov <bp@alien8.de>,
Thomas Gleixner <tglx@linutronix.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>, Jan Kara <jack@suse.cz>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Dan Williams <dan.j.williams@intel.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/1] stackleak: Disable function tracing and kprobes for stackleak_erase()
Date: Mon, 12 Nov 2018 20:49:18 -0500 [thread overview]
Message-ID: <20181112204918.2ba39252@vmware.local.home> (raw)
In-Reply-To: <1542056928-10917-1-git-send-email-alex.popov@linux.com>
On Tue, 13 Nov 2018 00:08:48 +0300
Alexander Popov <alex.popov@linux.com> wrote:
> The stackleak_erase() function is called on the trampoline stack at the end
> of syscall. This stack is not big enough for ftrace and kprobes operations,
> e.g. it can be exhausted if we use kprobe_events for stackleak_erase().
>
> So let's disable function tracing and kprobes for stackleak_erase().
>
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Alexander Popov <alex.popov@linux.com>
>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
-- Steve
next prev parent reply other threads:[~2018-11-13 1:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-12 21:08 [PATCH 1/1] stackleak: Disable function tracing and kprobes for stackleak_erase() Alexander Popov
2018-11-13 1:49 ` Steven Rostedt [this message]
2018-11-13 18:23 ` Masami Hiramatsu
2018-11-13 20:06 ` Kees Cook
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