Re: [patch] mpi/mpi-mpow: NULL dereference on allocation failure

walter harms
2011-11-21T17:00:38Z

Am 21.11.2011 15:50, schrieb Dan Carpenter:
> We can't call mpi_free() on the elements if the first kzalloc() fails.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/lib/mpi/mpi-mpow.c b/lib/mpi/mpi-mpow.c
> index 4cc7593..7328d0d 100644
> --- a/lib/mpi/mpi-mpow.c
> +++ b/lib/mpi/mpi-mpow.c
> @@ -73,7 +73,7 @@ int mpi_mulpowm(MPI res, MPI *basearray, MPI *exparray, MPI m)
>
> G = kzalloc((1 << k) * sizeof *G, GFP_KERNEL);
> if (!G)
> - goto nomem;
> + goto err_out;
>
> /* and calculate */
> tmp = mpi_alloc(mpi_get_nlimbs(m) + 1);
> @@ -129,5 +129,6 @@ nomem:
> for (i = 0; i < (1 << k); i++)
> mpi_free(G[i]);
> kfree(G);
> +err_out:
> return rc;
> }

the patch is ok
but is there any reason *not* to use a more nice name that 'G'
something more descriptive perhaps ?

re,
wh