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| author | Dan Carpenter <dan.carpenter@linaro.org> | 2023-10-30 12:02:59 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-11-17 19:16:29 +0800 |
| commit | 8ae0b5942364e09147e4162cdf6d3e74d976a1be (patch) | |
| tree | 567f16bdb5e67ac7d411e6b01c2ad347b256600e /crypto/rsa.c | |
| parent | a587c5ee0a45dea9ed6fc3d695259da8dc7a5bb3 (diff) | |
| download | linux-crypto-8ae0b5942364e09147e4162cdf6d3e74d976a1be.tar.gz linux-crypto-8ae0b5942364e09147e4162cdf6d3e74d976a1be.zip | |
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: 7096d7d6238c ("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>
Diffstat (limited to '')
| -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 c79613cd..b9cd11fb 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) { |