4.4-stable review patch. If anyone has any objections, please let me know.
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From: Boris Ostrovsky boris.ostrovsky@oracle.com
commit 70513d58751d7c6c1a0133557b13089b9f2e3e66 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/xen/pmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/xen/pmu.c +++ b/arch/x86/xen/pmu.c @@ -477,7 +477,7 @@ static void xen_convert_regs(const struc 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();