Commit 70513d58 authored Jul 12, 2018 by Boris Ostrovsky

xen/x86/vpmu: Zero struct pt_regs before calling into sample handling code



Otherwise we may leak kernel stack for events that sample user
registers.

Reported-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: stable@vger.kernel.org

parent 58a57569

arch/x86/xen/pmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -478,7 +478,7 @@ static void xen_convert_regs(const struct xen_pmu_regs *xen_regs,
		irqreturn_t xen_pmu_irq_handler(int irq, void *dev_id)
		{
		int err, ret = IRQ_NONE;
		struct pt_regs regs;
		struct pt_regs regs = {0};
		const struct xen_pmu_data *xenpmu_data = get_xenpmu_data();
		uint8_t xenpmu_flags = get_xenpmu_flags();