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Commit fe0e94c5 authored by Dan Carpenter's avatar Dan Carpenter Committed by James Morris
Browse files

mpi/mpi-mpow: NULL dereference on allocation failure 



We can't call mpi_free() on the elements if the first kzalloc() fails.

Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarDmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent de353533

lib/mpi/mpi-mpow.c

+2 −1
Original line number Diff line number Diff line
@@ -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 @@ int mpi_mulpowm(MPI res, MPI *basearray, MPI *exparray, MPI m) 
	for (i = 0; i < (1 << k); i++)

		mpi_free(G[i]);

	kfree(G);

err_out:

	return rc;

}