Protect access to seq->xwin[] with the seq mutex.
MFC after: 5 weeks
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=353027
@ -1462,6 +1462,7 @@ ng_l2tp_seq_rack_timeout(node_p node, hook_p hook, void *arg1, int arg2)
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/* Sanity check */
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L2TP_SEQ_CHECK(seq);
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mtx_lock(&seq->mtx);
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priv->stats.xmitRetransmits++;
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/* Have we reached the retransmit limit? If so, notify owner. */
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@ -1482,7 +1483,9 @@ ng_l2tp_seq_rack_timeout(node_p node, hook_p hook, void *arg1, int arg2)
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seq->acks = 0;
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/* Retransmit oldest unack'd packet */
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if ((m = L2TP_COPY_MBUF(seq->xwin[0], M_NOWAIT)) == NULL)
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m = L2TP_COPY_MBUF(seq->xwin[0], M_NOWAIT);
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mtx_unlock(&seq->mtx);
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if (m == NULL)
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priv->stats.memoryFailures++;
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else
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ng_l2tp_xmit_ctrl(priv, m, seq->ns++);
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