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    Contents of /trunk/kernel26-magellan/patches-2.6.16-r12/0127-2.6.16.15-fragmented-SCTP-control-chunks-CVE-2006-2272.patch

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    Revision 72 - (show annotations) (download)
    Mon Jun 5 09:25:38 2006 UTC (17 years, 10 months ago) by niro
    File size: 2107 byte(s) 
    ver bump to 2.6.16-r12:
- updated to linux-2.6.16.19
- updated to ck11
    1 From: Sridhar Samudrala <sri@us.ibm.com>
    2 Date: Sat, 6 May 2006 00:04:43 +0000 (-0700)
    3 Subject: [PATCH] SCTP: Fix panic's when receiving fragmented SCTP control chunks. (CVE-2006 ...
    4 X-Git-Url: http://www.kernel.org/git/?p=linux/kernel/git/stable/linux-2.6.16.y.git;a=commitdiff;h=40885c13b394cd1b74acc196f1d7990a3e0a484d
    5
    6 [PATCH] SCTP: Fix panic's when receiving fragmented SCTP control chunks. (CVE-2006-2272)
    7
    8 Use pskb_pull() to handle incoming COOKIE_ECHO and HEARTBEAT chunks that
    9 are received as skb's with fragment list.
    10
    11 Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
    12 Signed-off-by: David S. Miller <davem@davemloft.net>
    13 Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    14 ---
    15
    16 --- a/net/sctp/sm_statefuns.c
    17 +++ b/net/sctp/sm_statefuns.c
    18 @@ -636,8 +636,9 @@ sctp_disposition_t sctp_sf_do_5_1D_ce(co
    19 */
    20 chunk->subh.cookie_hdr =
    21 (struct sctp_signed_cookie *)chunk->skb->data;
    22 - skb_pull(chunk->skb,
    23 - ntohs(chunk->chunk_hdr->length) - sizeof(sctp_chunkhdr_t));
    24 + if (!pskb_pull(chunk->skb, ntohs(chunk->chunk_hdr->length) -
    25 + sizeof(sctp_chunkhdr_t)))
    26 + goto nomem;
    27
    28 /* 5.1 D) Upon reception of the COOKIE ECHO chunk, Endpoint
    29 * "Z" will reply with a COOKIE ACK chunk after building a TCB
    30 @@ -965,7 +966,8 @@ sctp_disposition_t sctp_sf_beat_8_3(cons
    31 */
    32 chunk->subh.hb_hdr = (sctp_heartbeathdr_t *) chunk->skb->data;
    33 paylen = ntohs(chunk->chunk_hdr->length) - sizeof(sctp_chunkhdr_t);
    34 - skb_pull(chunk->skb, paylen);
    35 + if (!pskb_pull(chunk->skb, paylen))
    36 + goto nomem;
    37
    38 reply = sctp_make_heartbeat_ack(asoc, chunk,
    39 chunk->subh.hb_hdr, paylen);
    40 @@ -1860,8 +1862,9 @@ sctp_disposition_t sctp_sf_do_5_2_4_dupc
    41 * are in good shape.
    42 */
    43 chunk->subh.cookie_hdr = (struct sctp_signed_cookie *)chunk->skb->data;
    44 - skb_pull(chunk->skb, ntohs(chunk->chunk_hdr->length) -
    45 - sizeof(sctp_chunkhdr_t));
    46 + if (!pskb_pull(chunk->skb, ntohs(chunk->chunk_hdr->length) -
    47 + sizeof(sctp_chunkhdr_t)))
    48 + goto nomem;
    49
    50 /* In RFC 2960 5.2.4 3, if both Verification Tags in the State Cookie
    51 * of a duplicate COOKIE ECHO match the Verification Tags of the