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| author | Al Viro <viro@ftp.linux.org.uk> | 2007-10-14 19:21:20 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-14 12:41:51 -0700 |
| commit | 411223c01a51163e995dbc2679bf8e963a136a5f (patch) | |
| tree | d482cfd94bf1f4e36035d7f00d6160d9dc5f74d6 /net/sctp | |
| parent | 47063d6b11fdeb166a323315a9e19f565b73d352 (diff) | |
| download | lwn-411223c01a51163e995dbc2679bf8e963a136a5f.tar.gz lwn-411223c01a51163e995dbc2679bf8e963a136a5f.zip | |
fix breakage in sctp getsockopt
copy_to_user() into on-stack array
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/socket.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 9c6a4b5f6264..bd6f42a15a4b 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -5058,6 +5058,7 @@ static int sctp_getsockopt_active_key(struct sock *sk, int len, static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len, char __user *optval, int __user *optlen) { + struct sctp_authchunks __user *p = (void __user *)optval; struct sctp_authchunks val; struct sctp_association *asoc; struct sctp_chunks_param *ch; @@ -5066,10 +5067,10 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len, if (len <= sizeof(struct sctp_authchunks)) return -EINVAL; - if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks))) + if (copy_from_user(&val, p, sizeof(struct sctp_authchunks))) return -EFAULT; - to = val.gauth_chunks; + to = p->gauth_chunks; asoc = sctp_id2assoc(sk, val.gauth_assoc_id); if (!asoc) return -EINVAL; @@ -5092,6 +5093,7 @@ static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len, static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len, char __user *optval, int __user *optlen) { + struct sctp_authchunks __user *p = (void __user *)optval; struct sctp_authchunks val; struct sctp_association *asoc; struct sctp_chunks_param *ch; @@ -5100,10 +5102,10 @@ static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len, if (len <= sizeof(struct sctp_authchunks)) return -EINVAL; - if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks))) + if (copy_from_user(&val, p, sizeof(struct sctp_authchunks))) return -EFAULT; - to = val.gauth_chunks; + to = p->gauth_chunks; asoc = sctp_id2assoc(sk, val.gauth_assoc_id); if (!asoc && val.gauth_assoc_id && sctp_style(sk, UDP)) return -EINVAL; |