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authorNeil Horman <nhorman@tuxdriver.com>2006-05-05 17:02:09 -0700
committerChris Wright <chrisw@sous-sol.org>2006-05-09 12:53:21 -0700
commit2e2a2cd09dd7b3fbc99a1879a54090fd6db16f0c (patch)
tree0ec7e0b342f783c4a6ebe9ed083ddec41182041f /include
parentcb19baa0bb7a4064e6d0c99e8f479673120a9f28 (diff)
[PATCH] SCTP: Allow spillover of receive buffer to avoid deadlock. (CVE-2006-2275)
This patch fixes a deadlock situation in the receive path by allowing temporary spillover of the receive buffer. - If the chunk we receive has a tsn that immediately follows the ctsn, accept it even if we run out of receive buffer space and renege data with higher TSNs. - Once we accept one chunk in a packet, accept all the remaining chunks even if we run out of receive buffer space. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Acked-by: Mark Butler <butlerm@middle.net> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Diffstat (limited to 'include')
-rw-r--r--include/net/sctp/structs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 072f407848a6..acb2ce16e6d5 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -702,6 +702,7 @@ struct sctp_chunk {
__u8 tsn_gap_acked; /* Is this chunk acked by a GAP ACK? */
__s8 fast_retransmit; /* Is this chunk fast retransmitted? */
__u8 tsn_missing_report; /* Data chunk missing counter. */
+ __u8 data_accepted; /* At least 1 chunk in this packet accepted */
};
void sctp_chunk_hold(struct sctp_chunk *);