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[SCTP]: Prevent OOPS if hmac modules didn't load 

SCTP was checking for NULL when trying to detect hmac
allocation failure where it should have been using IS_ERR.
Also, print a rate limited warning to the log telling the
user what happend.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2007-05-09 13:50:20 -07:00 committed by David S. Miller
parent d9568ba91b
commit 8dc4984a6b
1 changed files with 6 additions and 1 deletions
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7
net/sctp/socket.c
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@ -5227,7 +5227,12 @@ int sctp_inet_listen(struct socket *sock, int backlog)
/* Allocate HMAC for generating cookie. */
if (sctp_hmac_alg) {
tfm = crypto_alloc_hash(sctp_hmac_alg, 0, CRYPTO_ALG_ASYNC);
if (!tfm) {
if (IS_ERR(tfm)) {
if (net_ratelimit()) {
printk(KERN_INFO
"SCTP: failed to load transform for %s: %ld\n",
sctp_hmac_alg, PTR_ERR(tfm));
}
err = -ENOSYS;
goto out;
}