From: Thomas Gleixner tglx@linutronix.de
[ Upstream commit 2591bc4e8d70b4e1330d327fb7e3921f4e070a51 ]
apic->send_IPI_allbutself() takes a vector number as argument.
APIC_DM_NMI is clearly not a vector number. It's defined to 0x400 which is outside the vector space.
Use NMI_VECTOR instead as that's what it is intended to be.
Fixes: 82da3ff89dc2 ("x86: kgdb support") Signed-off-by: Thomas Gleixner tglx@linutronix.de Acked-by: Peter Zijlstra (Intel) peterz@infradead.org Link: https://lkml.kernel.org/r/20190722105218.855189979@linutronix.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kernel/kgdb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c index 44256a62702b..4a08fda2b06f 100644 --- a/arch/x86/kernel/kgdb.c +++ b/arch/x86/kernel/kgdb.c @@ -437,7 +437,7 @@ static void kgdb_disable_hw_debug(struct pt_regs *regs) */ void kgdb_roundup_cpus(unsigned long flags) { - apic->send_IPI_allbutself(APIC_DM_NMI); + apic->send_IPI_allbutself(NMI_VECTOR); } #endif