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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2023-10-30 12:02:59 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-25 15:44:40 -0800 |
| commit | 95ad8b6879e2e49d02e3bfc0e1fb46421633fe2a (patch) | |
| tree | ca8da4c82180b266140c24c04a3dc6611ca18673 /crypto | |
| parent | 7f25cd51aa71711438a6c11fa638ba5aba61ed95 (diff) | |
crypto: rsa - add a check for allocation failure
[ 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>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/rsa.c | 2 |
1 files changed, 2 insertions, 0 deletions
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) { |