Messages in this thread Patch in this message | | | From | Boris Ostrovsky <> | Subject | [PATCH] xen/x86/vpmu: Zero struct pt_regs before calling into sample handling code | Date | Thu, 12 Jul 2018 13:27:00 -0400 |
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Otherwise we may leak kernel stack for events that sample user registers.
Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: stable@vger.kernel.org --- arch/x86/xen/pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c index 7d00d4a..95997e6 100644 --- a/arch/x86/xen/pmu.c +++ b/arch/x86/xen/pmu.c @@ -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(); -- 1.8.3.1
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