From: Joerg Roedel <[email protected]> The value of STACK_TYPE_EXCEPTION_LAST points to the last _valid_ exception stack. Reflect that in the check done in the vc_switch_off_ist() function.
Reported-by: Tom Lendacky <[email protected]> Fixes: a13644f3a53de ("x86/entry/64: Add entry code for #VC handler") Signed-off-by: Joerg Roedel <[email protected]> --- arch/x86/kernel/traps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index a58800973aed..f516f2b4797e 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -709,7 +709,7 @@ asmlinkage __visible noinstr struct pt_regs *vc_switch_off_ist(struct pt_regs *r stack = (unsigned long *)sp; if (!get_stack_info_noinstr(stack, current, &info) || info.type == STACK_TYPE_ENTRY || - info.type >= STACK_TYPE_EXCEPTION_LAST) + info.type > STACK_TYPE_EXCEPTION_LAST) sp = __this_cpu_ist_top_va(VC2); sync: -- 2.33.1 _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
