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From: tip-bot for Andrea Righi <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: yhs@fb.com, tglx@linutronix.de, linux-kernel@vger.kernel.org,
	mhiramat@kernel.org, luto@kernel.org, hpa@zytor.com,
	righi.andrea@gmail.com, torvalds@linux-foundation.org,
	bp@alien8.de, peterz@infradead.org,
	naveen.n.rao@linux.vnet.ibm.com, mingo@kernel.org,
	davem@davemloft.net, anil.s.keshavamurthy@intel.com
Subject: [tip:perf/urgent] kprobes/x86: Blacklist non-attachable interrupt functions
Date: Thu, 6 Dec 2018 08:39:53 -0800
Message-ID: <tip-a50480cb6d61d5c5fc13308479407b628b6bc1c5@git.kernel.org> (raw)
In-Reply-To: <20181206095648.GA8249@Dell>

Commit-ID:  a50480cb6d61d5c5fc13308479407b628b6bc1c5
Gitweb:     https://git.kernel.org/tip/a50480cb6d61d5c5fc13308479407b628b6bc1c5
Author:     Andrea Righi <righi.andrea@gmail.com>
AuthorDate: Thu, 6 Dec 2018 10:56:48 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 6 Dec 2018 16:52:03 +0100

kprobes/x86: Blacklist non-attachable interrupt functions

These interrupt functions are already non-attachable by kprobes.
Blacklist them explicitly so that they can show up in
/sys/kernel/debug/kprobes/blacklist and tools like BCC can use this
additional information.

Signed-off-by: Andrea Righi <righi.andrea@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lkml.kernel.org/r/20181206095648.GA8249@Dell
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/entry/entry_64.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index ce25d84023c0..1f0efdb7b629 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -566,6 +566,7 @@ ENTRY(interrupt_entry)
 
 	ret
 END(interrupt_entry)
+_ASM_NOKPROBE(interrupt_entry)
 
 
 /* Interrupt entry/exit. */
@@ -766,6 +767,7 @@ native_irq_return_ldt:
 	jmp	native_irq_return_iret
 #endif
 END(common_interrupt)
+_ASM_NOKPROBE(common_interrupt)
 
 /*
  * APIC interrupts.
@@ -780,6 +782,7 @@ ENTRY(\sym)
 	call	\do_sym	/* rdi points to pt_regs */
 	jmp	ret_from_intr
 END(\sym)
+_ASM_NOKPROBE(\sym)
 .endm
 
 /* Make sure APIC interrupt handlers end up in the irqentry section: */
@@ -960,6 +963,7 @@ ENTRY(\sym)
 
 	jmp	error_exit
 	.endif
+_ASM_NOKPROBE(\sym)
 END(\sym)
 .endm
 

  reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-06  9:56 [PATCH] kprobes: x86_64: blacklist " Andrea Righi
2018-12-06 16:39 ` tip-bot for Andrea Righi [this message]
2018-12-07 14:47 ` Masami Hiramatsu
2018-12-07 16:01   ` Masami Hiramatsu
2018-12-07 17:00     ` Andrea Righi
2018-12-08  3:42       ` Masami Hiramatsu
2018-12-08  7:07         ` Andrea Righi
2018-12-07 17:58     ` Andrea Righi
2018-12-08  3:48       ` Masami Hiramatsu
2018-12-08  7:09         ` Andrea Righi
2018-12-16 16:07           ` Masami Hiramatsu

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