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authorXin Long <lucien.xin@gmail.com>2018-05-02 13:45:12 +0800
committerDavid S. Miller <davem@davemloft.net>2018-05-02 11:15:33 -0400
commitce402f044e4e432c296f90eaabb8dbe8f3624391 (patch)
treece1cca0cfdfae502a233ad6e9848f7e74a03ef7c /net
parent46e16d4b956867013e0bbd7f2bad206f4aa55752 (diff)
downloadlinux-ce402f044e4e432c296f90eaabb8dbe8f3624391.tar.bz2
sctp: fix the issue that the cookie-ack with auth can't get processed
When auth is enabled for cookie-ack chunk, in sctp_inq_pop, sctp processes auth chunk first, then continues to the next chunk in this packet if chunk_end + chunk_hdr size < skb_tail_pointer(). Otherwise, it will go to the next packet or discard this chunk. However, it missed the fact that cookie-ack chunk's size is equal to chunk_hdr size, which couldn't match that check, and thus this chunk would not get processed. This patch fixes it by changing the check to chunk_end + chunk_hdr size <= skb_tail_pointer(). Fixes: 26b87c788100 ("net: sctp: fix remote memory pressure from excessive queueing") Signed-off-by: Xin Long <lucien.xin@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sctp/inqueue.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c
index 23ebc5318edc..eb93ffe2408b 100644
--- a/net/sctp/inqueue.c
+++ b/net/sctp/inqueue.c
@@ -217,7 +217,7 @@ new_skb:
skb_pull(chunk->skb, sizeof(*ch));
chunk->subh.v = NULL; /* Subheader is no longer valid. */
- if (chunk->chunk_end + sizeof(*ch) < skb_tail_pointer(chunk->skb)) {
+ if (chunk->chunk_end + sizeof(*ch) <= skb_tail_pointer(chunk->skb)) {
/* This is not a singleton */
chunk->singleton = 0;
} else if (chunk->chunk_end > skb_tail_pointer(chunk->skb)) {