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From: Masami Hiramatsu <mhiramat@kernel.org>
To: Ingo Molnar <mingo@redhat.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
	peterz@infradead.org,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Andrea Righi <righi.andrea@gmail.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	stable@vger.kernel.org
Subject: [PATCH 1/9] x86/kprobes: Prohibit probing on optprobe template code
Date: Thu, 10 Jan 2019 11:54:30 +0900	[thread overview]
Message-ID: <154708887054.6325.3201133039718891603.stgit@devbox> (raw)
In-Reply-To: <154708884117.6325.4454464467156828009.stgit@devbox>

Prohibit probing on optprobe template code, since it is not
a code but a template instruction sequence. If we modify
this template, copied template must be broken.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Fixes: 9326638cbee2 ("kprobes, x86: Use NOKPROBE_SYMBOL() instead of __kprobes annotation")
---
 arch/x86/kernel/kprobes/opt.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kernel/kprobes/opt.c b/arch/x86/kernel/kprobes/opt.c
index 6adf6e6c2933..544bd41a514c 100644
--- a/arch/x86/kernel/kprobes/opt.c
+++ b/arch/x86/kernel/kprobes/opt.c
@@ -141,6 +141,11 @@ asm (
 
 void optprobe_template_func(void);
 STACK_FRAME_NON_STANDARD(optprobe_template_func);
+NOKPROBE_SYMBOL(optprobe_template_func);
+NOKPROBE_SYMBOL(optprobe_template_entry);
+NOKPROBE_SYMBOL(optprobe_template_val);
+NOKPROBE_SYMBOL(optprobe_template_call);
+NOKPROBE_SYMBOL(optprobe_template_end);
 
 #define TMPL_MOVE_IDX \
 	((long)optprobe_template_val - (long)optprobe_template_entry)


  reply	other threads:[~2019-01-10  2:54 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-10  2:54 [PATCH 0/9] kprobes: Fix and improve blacklist symbols Masami Hiramatsu
2019-01-10  2:54 ` Masami Hiramatsu [this message]
2019-01-10  6:07   ` [PATCH 1/9] x86/kprobes: Prohibit probing on optprobe template code Greg KH
2019-01-10 14:57     ` Masami Hiramatsu
2019-01-10 17:10       ` Steven Rostedt
2019-01-11  0:52         ` Masami Hiramatsu
2019-01-10  2:54 ` [PATCH 2/9] x86/kprobes: Move trampoline code into RODATA Masami Hiramatsu
2019-01-10  2:55 ` [PATCH 3/9] x86/kprobes: Prohibit probing on functions before kprobe_int3_handler() Masami Hiramatsu
2019-01-10  2:55 ` [PATCH 4/9] x86/kprobes: Prohibit probing on IRQ handlers directly Masami Hiramatsu
2019-01-10  2:56 ` [PATCH 5/9] kprobes: Search non-suffixed symbol in blacklist Masami Hiramatsu
2019-01-10  2:56 ` [PATCH 6/9] kprobes: Prohibit probing on hardirq tracers Masami Hiramatsu
2019-01-10 17:12   ` Steven Rostedt
2019-01-11 14:21     ` Masami Hiramatsu
2019-01-10  2:57 ` [PATCH 7/9] kprobes: Prohibit probing on preempt_check debug functions Masami Hiramatsu
2019-01-10  2:57 ` [PATCH 8/9] kprobes: Prohibit probing on RCU debug routine Masami Hiramatsu
2019-01-10  2:58 ` [PATCH 9/9] kprobes: Prohibit probing on lockdep functions Masami Hiramatsu

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