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crypto: rsa - add a check for allocation failure
Static checkers insist that the mpi_alloc() allocation can fail so add
a check to prevent a NULL dereference. Small allocations like this
can't actually fail in current kernels, but adding a check is very
simple and makes the static checkers happy.
Fixes: 6637e11e4a
("crypto: rsa - allow only odd e and restrict value in FIPS mode")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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@ -220,6 +220,8 @@ static int rsa_check_exponent_fips(MPI e)
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}
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}
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e_max = mpi_alloc(0);
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e_max = mpi_alloc(0);
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if (!e_max)
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return -ENOMEM;
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mpi_set_bit(e_max, 256);
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mpi_set_bit(e_max, 256);
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if (mpi_cmp(e, e_max) >= 0) {
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if (mpi_cmp(e, e_max) >= 0) {
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