From 08814e4abc7311e72fe16e70d854c79abc66f2e6 Mon Sep 17 00:00:00 2001 From: Steffen Klassert Date: Thu, 29 Mar 2012 09:04:46 +0200 Subject: crypto: user - Fix size of netlink dump message The default netlink message size limit might be exceeded when dumping a lot of algorithms to userspace. As a result, not all of the instantiated algorithms dumped to userspace. So calculate an upper bound on the message size and call netlink_dump_start() with that value. Signed-off-by: Steffen Klassert Signed-off-by: Herbert Xu --- crypto/crypto_user.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'crypto') diff --git a/crypto/crypto_user.c b/crypto/crypto_user.c index e91c16111ed3..f1ea0a064135 100644 --- a/crypto/crypto_user.c +++ b/crypto/crypto_user.c @@ -457,12 +457,20 @@ static int crypto_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if ((type == (CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE) && (nlh->nlmsg_flags & NLM_F_DUMP))) { + struct crypto_alg *alg; + u16 dump_alloc = 0; + if (link->dump == NULL) return -EINVAL; + + list_for_each_entry(alg, &crypto_alg_list, cra_list) + dump_alloc += CRYPTO_REPORT_MAXSIZE; + { struct netlink_dump_control c = { .dump = link->dump, .done = link->done, + .min_dump_alloc = dump_alloc, }; return netlink_dump_start(crypto_nlsk, skb, nlh, &c); } -- cgit v1.2.3