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Subject[patch 52/69] SCTP: Prevent OOPS if hmac modules didnt load
-stable review patch.  If anyone has any objections, please let us know.
---------------------
From: Vlad Yasevich <vladislav.yasevich@hp.com>

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>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>

---
net/sctp/socket.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- linux-2.6.21.1.orig/net/sctp/socket.c
+++ linux-2.6.21.1/net/sctp/socket.c
@@ -4985,7 +4985,12 @@ int sctp_inet_listen(struct socket *sock
/* 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;
}
--
-
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