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| author | Christoph Hellwig <hch@lst.de> | 2020-07-19 09:22:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-19 18:26:42 -0700 |
| commit | 534d13d07e771d090d61cd98f96b2cbf29765cef (patch) | |
| tree | afb31f3579c35593dc3cd72b4f0535869598babb /net/sctp | |
| parent | 89fae01eef8b1572c71d2cfcc3307c1f1e97b778 (diff) | |
| download | linux-stable-534d13d07e771d090d61cd98f96b2cbf29765cef.tar.gz linux-stable-534d13d07e771d090d61cd98f96b2cbf29765cef.tar.bz2 linux-stable-534d13d07e771d090d61cd98f96b2cbf29765cef.zip | |
sctp: pass a kernel pointer to sctp_setsockopt_auth_key
Use the kernel pointer that sctp_setsockopt has available instead of
directly handling the user pointer. Adapt sctp_setsockopt to use a
kzfree for this case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/socket.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 365145746b55..b4dcccba5787 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -3594,11 +3594,10 @@ static int sctp_setsockopt_hmac_ident(struct sock *sk, * association shared key. */ static int sctp_setsockopt_auth_key(struct sock *sk, - char __user *optval, + struct sctp_authkey *authkey, unsigned int optlen) { struct sctp_endpoint *ep = sctp_sk(sk)->ep; - struct sctp_authkey *authkey; struct sctp_association *asoc; int ret = -EINVAL; @@ -3609,10 +3608,6 @@ static int sctp_setsockopt_auth_key(struct sock *sk, */ optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey)); - authkey = memdup_user(optval, optlen); - if (IS_ERR(authkey)) - return PTR_ERR(authkey); - if (authkey->sca_keylength > optlen - sizeof(*authkey)) goto out; @@ -3650,7 +3645,6 @@ static int sctp_setsockopt_auth_key(struct sock *sk, out: memzero_explicit(authkey, optlen); - kfree(authkey); return ret; } @@ -4692,7 +4686,7 @@ static int sctp_setsockopt(struct sock *sk, int level, int optname, retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen); break; case SCTP_AUTH_KEY: - retval = sctp_setsockopt_auth_key(sk, optval, optlen); + retval = sctp_setsockopt_auth_key(sk, kopt, optlen); break; case SCTP_AUTH_ACTIVE_KEY: retval = sctp_setsockopt_active_key(sk, optval, optlen); |