tipc: Enhance filtering of out-dated link reset messages
Ensure TIPC ignores an out-dated link reset message whose session number predates the current session number. (Previously, TIPC only ignored an out-date reset message whose session number was equal to the current link session number.) Out-dated link reset messages should not occur under normal circumstances; however, they can be generated if a link endpoint is unable to send a link reset message right away and queues it for later delivery, but the queued message is not sent until after the link is established. Thanks to Laser [gotolaser@gmail.com] for diagnosing the problem and contributing a prototype patch. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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1 changed files with 2 additions and 2 deletions
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@ -2045,8 +2045,8 @@ static void link_recv_proto_msg(struct link *l_ptr, struct sk_buff *buf)
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case RESET_MSG:
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case RESET_MSG:
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if (!link_working_unknown(l_ptr) &&
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if (!link_working_unknown(l_ptr) &&
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(l_ptr->peer_session != INVALID_SESSION)) {
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(l_ptr->peer_session != INVALID_SESSION)) {
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if (msg_session(msg) == l_ptr->peer_session)
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if (less_eq(msg_session(msg), l_ptr->peer_session))
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break; /* duplicate: ignore */
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break; /* duplicate or old reset: ignore */
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}
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}
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/* fall thru' */
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/* fall thru' */
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case ACTIVATE_MSG:
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case ACTIVATE_MSG:
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