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| author | Xin Long <lucien.xin@gmail.com> | 2018-05-02 13:37:44 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-02 11:15:32 -0400 |
| commit | 4842a08fb80bc09b7b089af42c58353dfaa8f88f (patch) | |
| tree | 914bfac5c6729987cfac62a071269eb139c221e5 | |
| parent | e6e6a278b1eaffa19d42186bfacd1ffc15a50b3f (diff) | |
| download | linux-4842a08fb80bc09b7b089af42c58353dfaa8f88f.tar.bz2 | |
sctp: init active key for the new asoc in dupcook_a and dupcook_b
When processing a duplicate cookie-echo chunk, for case 'A' and 'B',
after sctp_process_init for the new asoc, if auth is enabled for the
cookie-ack chunk, the active key should also be initialized.
Otherwise, the cookie-ack chunk made later can not be set with auth
shkey properly, and a crash can even be caused by this, as after
Commit 1b1e0bc99474 ("sctp: add refcnt support for sh_key"), sctp
needs to hold the shkey when making control chunks.
Fixes: 1b1e0bc99474 ("sctp: add refcnt support for sh_key")
Reported-by: Jianwen Ji <jiji@redhat.com>
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>
| -rw-r--r-- | net/sctp/sm_statefuns.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c index dd0594a10961..98acfed45e3b 100644 --- a/net/sctp/sm_statefuns.c +++ b/net/sctp/sm_statefuns.c @@ -1794,6 +1794,9 @@ static enum sctp_disposition sctp_sf_do_dupcook_a( GFP_ATOMIC)) goto nomem; + if (sctp_auth_asoc_init_active_key(new_asoc, GFP_ATOMIC)) + goto nomem; + /* Make sure no new addresses are being added during the * restart. Though this is a pretty complicated attack * since you'd have to get inside the cookie. @@ -1906,6 +1909,9 @@ static enum sctp_disposition sctp_sf_do_dupcook_b( GFP_ATOMIC)) goto nomem; + if (sctp_auth_asoc_init_active_key(new_asoc, GFP_ATOMIC)) + goto nomem; + /* Update the content of current association. */ sctp_add_cmd_sf(commands, SCTP_CMD_UPDATE_ASSOC, SCTP_ASOC(new_asoc)); sctp_add_cmd_sf(commands, SCTP_CMD_NEW_STATE, |