On Tue, 2017-08-08 at 07:06:32 UTC, Michael Ellerman wrote:
> In iommu_range_alloc() we generate a mask by right shifting ~0,
> however if the specified alignment is 0 then we right shift by 64,
> which is undefined. UBSAN tells us so:
>
> UBSAN: Undefined behaviour in ../arch/powerpc/kernel/iom
In iommu_range_alloc() we generate a mask by right shifting ~0,
however if the specified alignment is 0 then we right shift by 64,
which is undefined. UBSAN tells us so:
UBSAN: Undefined behaviour in ../arch/powerpc/kernel/iommu.c:193:35
shift exponent 64 is too large for 64-bit type 'long uns
