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author | David S. Miller <davem@davemloft.net> | 2013-06-06 12:03:06 +0400 |
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committer | David S. Miller <davem@davemloft.net> | 2013-06-06 12:03:06 +0400 |
commit | 143554ace8919d5ef3cc8424c0b06dbd3d671b4e (patch) | |
tree | ab1c540cf8086c513aa7c0f831fb556263bf72d7 /net/netfilter/nfnetlink_queue_core.c | |
parent | 6bc19fb82d4c05a9eee19d6d2aab2ce26e499ec2 (diff) | |
parent | 7f87712c0152511a1842698ad8dca425fee2dc4f (diff) | |
download | linux-143554ace8919d5ef3cc8424c0b06dbd3d671b4e.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Conflicts:
net/netfilter/nf_log.c
The conflict in nf_log.c is that in 'net' we added CONFIG_PROC_FS
protection around foo_proc_entry() calls to fix a build failure,
whereas in Pablo's tree a guard if() test around a call is
remove_proc_entry() was removed. Trivially resolved.
Pablo Neira Ayuso says:
====================
The following patchset contains the first batch of
Netfilter/IPVS updates for your net-next tree, they are:
* Three patches with improvements and code refactorization
for nfnetlink_queue, from Florian Westphal.
* FTP helper now parses replies without brackets, as RFC1123
recommends, from Jeff Mahoney.
* Rise a warning to tell everyone about ULOG deprecation,
NFLOG has been already in the kernel tree for long time
and supersedes the old logging over netlink stub, from
myself.
* Don't panic if we fail to load netfilter core framework,
just bail out instead, from myself.
* Add cond_resched_rcu, used by IPVS to allow rescheduling
while walking over big hashtables, from Simon Horman.
* Change type of IPVS sysctl_sync_qlen_max sysctl to avoid
possible overflow, from Zhang Yanfei.
* Use strlcpy instead of strncpy to skip zeroing of already
initialized area to write the extension names in ebtables,
from Chen Gang.
* Use already existing per-cpu notrack object from xt_CT,
from Eric Dumazet.
* Save explicit socket lookup in xt_socket now that we have
early demux, also from Eric Dumazet.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netfilter/nfnetlink_queue_core.c')
-rw-r--r-- | net/netfilter/nfnetlink_queue_core.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/net/netfilter/nfnetlink_queue_core.c b/net/netfilter/nfnetlink_queue_core.c index 0f2ac8f2e7b7..c011543bff5d 100644 --- a/net/netfilter/nfnetlink_queue_core.c +++ b/net/netfilter/nfnetlink_queue_core.c @@ -41,6 +41,14 @@ #define NFQNL_QMAX_DEFAULT 1024 +/* We're using struct nlattr which has 16bit nla_len. Note that nla_len + * includes the header length. Thus, the maximum packet length that we + * support is 65531 bytes. We send truncated packets if the specified length + * is larger than that. Userspace can check for presence of NFQA_CAP_LEN + * attribute to detect truncation. + */ +#define NFQNL_MAX_COPY_RANGE (0xffff - NLA_HDRLEN) + struct nfqnl_instance { struct hlist_node hlist; /* global list of queues */ struct rcu_head rcu; @@ -122,7 +130,7 @@ instance_create(struct nfnl_queue_net *q, u_int16_t queue_num, inst->queue_num = queue_num; inst->peer_portid = portid; inst->queue_maxlen = NFQNL_QMAX_DEFAULT; - inst->copy_range = 0xffff; + inst->copy_range = NFQNL_MAX_COPY_RANGE; inst->copy_mode = NFQNL_COPY_NONE; spin_lock_init(&inst->lock); INIT_LIST_HEAD(&inst->queue_list); @@ -333,10 +341,9 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue, return NULL; data_len = ACCESS_ONCE(queue->copy_range); - if (data_len == 0 || data_len > entskb->len) + if (data_len > entskb->len) data_len = entskb->len; - if (!entskb->head_frag || skb_headlen(entskb) < L1_CACHE_BYTES || skb_shinfo(entskb)->nr_frags >= MAX_SKB_FRAGS) @@ -465,7 +472,8 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue, if (ct && nfqnl_ct_put(skb, ct, ctinfo) < 0) goto nla_put_failure; - if (cap_len > 0 && nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) + if (cap_len > data_len && + nla_put_be32(skb, NFQA_CAP_LEN, htonl(cap_len))) goto nla_put_failure; if (nfqnl_put_packet_info(skb, entskb)) @@ -509,10 +517,6 @@ __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue, } spin_lock_bh(&queue->lock); - if (!queue->peer_portid) { - err = -EINVAL; - goto err_out_free_nskb; - } if (queue->queue_total >= queue->queue_maxlen) { if (queue->flags & NFQA_CFG_F_FAIL_OPEN) { failopen = 1; @@ -731,13 +735,8 @@ nfqnl_set_mode(struct nfqnl_instance *queue, case NFQNL_COPY_PACKET: queue->copy_mode = mode; - /* We're using struct nlattr which has 16bit nla_len. Note that - * nla_len includes the header length. Thus, the maximum packet - * length that we support is 65531 bytes. We send truncated - * packets if the specified length is larger than that. - */ - if (range > 0xffff - NLA_HDRLEN) - queue->copy_range = 0xffff - NLA_HDRLEN; + if (range == 0 || range > NFQNL_MAX_COPY_RANGE) + queue->copy_range = NFQNL_MAX_COPY_RANGE; else queue->copy_range = range; break; |