6.6-stable review patch. If anyone has any objections, please let me know.
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From: Dan Carpenter dan.carpenter@linaro.org
[ Upstream commit d872ca165cb67112f2841ef9c37d51ef7e63d1e4 ]
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: 6637e11e4ad2 ("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 Signed-off-by: Sasha Levin sashal@kernel.org --- crypto/rsa.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/crypto/rsa.c b/crypto/rsa.c index c79613cdce6e..b9cd11fb7d36 100644 --- a/crypto/rsa.c +++ b/crypto/rsa.c @@ -220,6 +220,8 @@ static int rsa_check_exponent_fips(MPI e) }
e_max = mpi_alloc(0); + if (!e_max) + return -ENOMEM; mpi_set_bit(e_max, 256);
if (mpi_cmp(e, e_max) >= 0) {