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| author | Xin Long <lucien.xin@gmail.com> | 2018-05-02 13:45:12 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-02 11:15:33 -0400 |
| commit | ce402f044e4e432c296f90eaabb8dbe8f3624391 (patch) | |
| tree | ce1cca0cfdfae502a233ad6e9848f7e74a03ef7c /net | |
| parent | 46e16d4b956867013e0bbd7f2bad206f4aa55752 (diff) | |
| download | linux-0-day-ce402f044e4e432c296f90eaabb8dbe8f3624391.tar.gz linux-0-day-ce402f044e4e432c296f90eaabb8dbe8f3624391.tar.xz | |
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.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sctp/inqueue.c b/net/sctp/inqueue.c index 23ebc5318edc4..eb93ffe2408bd 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subh.v = NULL; /* Subheader is no longer valid.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)) { |