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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2017-06-23 13:15:44 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-23 14:19:27 -0400 |
| commit | ac55cd619335c577f29eea599a6a35b6b48797e8 (patch) | |
| tree | ee7e30c96b95f528ac7e5299f159d49a6b5490b4 /net/tls | |
| parent | 93bbbfbb4a5aa32a2375a86f3a23e48ea75e05db (diff) | |
| download | lwn-ac55cd619335c577f29eea599a6a35b6b48797e8.tar.gz lwn-ac55cd619335c577f29eea599a6a35b6b48797e8.zip | |
tls: return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining but we
want to return -EFAULT here.
Fixes: 3c4d7559159b ("tls: kernel TLS support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls')
| -rw-r--r-- | net/tls/tls_main.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c index 2ebc328bda96..a03130a47b85 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -273,7 +273,8 @@ static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, } if (len == sizeof(crypto_info)) { - rc = copy_to_user(optval, crypto_info, sizeof(*crypto_info)); + if (copy_to_user(optval, crypto_info, sizeof(*crypto_info))) + rc = -EFAULT; goto out; } @@ -293,9 +294,10 @@ static int do_tls_getsockopt_tx(struct sock *sk, char __user *optval, memcpy(crypto_info_aes_gcm_128->iv, ctx->iv, TLS_CIPHER_AES_GCM_128_IV_SIZE); release_sock(sk); - rc = copy_to_user(optval, - crypto_info_aes_gcm_128, - sizeof(*crypto_info_aes_gcm_128)); + if (copy_to_user(optval, + crypto_info_aes_gcm_128, + sizeof(*crypto_info_aes_gcm_128))) + rc = -EFAULT; break; } default: |