Commit d5813e77 authored Dec 06, 2018 by Andrea Righi Committed by Greg Kroah-Hartman Apr 05, 2019

kprobes/x86: Blacklist non-attachable interrupt functions



[ Upstream commit a50480cb6d61d5c5fc13308479407b628b6bc1c5 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent e7d26616

arch/x86/entry/entry_64.S

+4 −0

Original line number	Diff line number	Diff line
		@@ -627,6 +627,7 @@ ENTRY(interrupt_entry)

		ret
		END(interrupt_entry)
		_ASM_NOKPROBE(interrupt_entry)


		/* Interrupt entry/exit. */
		@@ -826,6 +827,7 @@ native_irq_return_ldt:
		jmp native_irq_return_iret
		#endif
		END(common_interrupt)
		_ASM_NOKPROBE(common_interrupt)

		/*
		* APIC interrupts.
		@@ -840,6 +842,7 @@ 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: */
		@@ -984,6 +987,7 @@ ENTRY(\sym)

		jmp error_exit
		.endif
		_ASM_NOKPROBE(\sym)
		END(\sym)
		.endm