Re: [GIT] More security subsystem fixes

[James Morris]

On Thu, 19 Jan 2012, Tetsuo Handa wrote:

> mpi_limb_t
> mpihelp_divrem(mpi_ptr_t qp, mpi_size_t qextra_limbs,
>                mpi_ptr_t np, mpi_size_t nsize, mpi_ptr_t dp, mpi_size_t dsize)
> {
>         mpi_limb_t most_significant_q_limb = 0;
> 
>         switch (dsize) {
>         case 0:
>                 /* We are asked to divide by zero, so go ahead and do it!  (To make
>                    the compiler not remove this statement, return the value.)  */
>                 return 1 / dsize;
> 
> What's this? Division by 0 in the kernel is no good.

David,

Do you know if this is triggerable from userland?


- James
-- 
James Morris
<jmorris@xxxxxxxxx>
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