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Commit 0a521588 authored by Jan Beulich's avatar Jan Beulich Committed by Linus Torvalds
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[PATCH] x86_64: fix bound check IDT gate 



Other than apparently commonly assumed, the bound instruction does not
require the corresponding IDT entry to have DPL 3.

Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 6e0c47ed

arch/x86_64/kernel/traps.c

+2 −2
Original line number Diff line number Diff line
@@ -881,8 +881,8 @@ void __init trap_init(void) 
	set_intr_gate_ist(1,&debug,DEBUG_STACK);

	set_intr_gate_ist(2,&nmi,NMI_STACK);

	set_system_gate(3,&int3);

	set_system_gate(4,&overflow);	/* int4-5 can be called from all */

	set_system_gate(5,&bounds);

	set_system_gate(4,&overflow);	/* int4 can be called from all */

	set_intr_gate(5,&bounds);

	set_intr_gate(6,&invalid_op);

	set_intr_gate(7,&device_not_available);

	set_intr_gate_ist(8,&double_fault, DOUBLEFAULT_STACK);