d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Protect access to seq->xwin[] with the seq mutex.

Browse Source 
MFC after:	5 weeks
This commit is contained in:
glebius 2019-10-03 02:34:51 +00:00
parent e21522e3a1
commit e8ad224686
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/netgraph/ng_l2tp.c
View File

@ -1462,6 +1462,7 @@ ng_l2tp_seq_rack_timeout(node_p node, hook_p hook, void *arg1, int arg2)
/* Sanity check */
L2TP_SEQ_CHECK(seq);
mtx_lock(&seq->mtx);
priv->stats.xmitRetransmits++;
/* Have we reached the retransmit limit? If so, notify owner. */
@ -1482,7 +1483,9 @@ ng_l2tp_seq_rack_timeout(node_p node, hook_p hook, void *arg1, int arg2)
seq->acks = 0;
/* Retransmit oldest unack'd packet */
if ((m = L2TP_COPY_MBUF(seq->xwin[0], M_NOWAIT)) == NULL)
m = L2TP_COPY_MBUF(seq->xwin[0], M_NOWAIT);
mtx_unlock(&seq->mtx);
if (m == NULL)
priv->stats.memoryFailures++;
else
ng_l2tp_xmit_ctrl(priv, m, seq->ns++);