[tip:perf/urgent] kprobes/x86: Blacklist non-attachable interrupt functions

[tip-bot for Andrea Righi]

Commit-ID:  a50480cb6d61d5c5fc13308479407b628b6bc1c5
Gitweb:     https://git.kernel.org/tip/a50480cb6d61d5c5fc13308479407b628b6bc1c5
Author:     Andrea Righi <righi.andrea@xxxxxxxxx>
AuthorDate: Thu, 6 Dec 2018 10:56:48 +0100
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
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@xxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Yonghong Song <yhs@xxxxxx>
Link: 20181206095648.GA8249@Dell">http://lkml.kernel.org/r/20181206095648.GA8249@Dell
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 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