diff mbox series

[Openvpn-devel,v1] dco-freebsd: fix peer stats storage on client instances

Message ID 20251028113310.19921-1-gert@greenie.muc.de
State Accepted
Headers
Series [Openvpn-devel,v1] dco-freebsd: fix peer stats storage on client instances |

Commit Message

Gert Doering Oct. 28, 2025, 11:33 a.m. UTC 
  From: Ralf Lici <ralf@mandelbit.com>

Commit bf01a96 introduced a bug in the dco-freebsd path by attempting to
store peer statistics in a structure that only exists on server
instances. This leads to a SIGSEGV on non-server instances due to a NULL
multi_context pointer.

Resolve this by checking what mode the current instance is running in
and storing peer stats accordingly.

Fixes: https://github.com/OpenVPN/openvpn/issues/875
Change-Id: I92b5f3996f2a2180fa5e94719603078c1fc2f7f6
Signed-off-by: Ralf Lici <ralf@mandelbit.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1290
---

This change was reviewed on Gerrit and approved by at least one
developer. I request to merge it to master.

Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1290
This mail reflects revision 1 of this Change.

Acked-by according to Gerrit (reflected above):
Gert Doering <gert@greenie.muc.de>

Comments

Gert Doering Oct. 28, 2025, 11:46 a.m. UTC | #1 
Marco, thanks for the review, and for finding the problem in the first
place :-)

I have tested this on FreeBSD 14 + DCO, and both the client and the server
side are now well-behaved and put the counter values in a nice place and
do not crash (I might have found a new bug - GH #881 - but that's not 
directly related to the counter stuff).

Your patch has been applied to the master branch.

commit dc6b75788c626add84384ac121e11b65f9e02a6a
Author: Ralf Lici
Date:   Tue Oct 28 12:33:05 2025 +0100

     dco-freebsd: fix peer stats storage on client instances

     Signed-off-by: Ralf Lici <ralf@mandelbit.com>
     Acked-by: Gert Doering <gert@greenie.muc.de>
     Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1290
     Message-Id: <20251028113310.19921-1-gert@greenie.muc.de>
     Signed-off-by: Gert Doering <gert@greenie.muc.de>


--
kind regards,

Gert Doering
diff mbox series

Patch

diff --git a/src/openvpn/dco_freebsd.c b/src/openvpn/dco_freebsd.c
index e51f8dd..3521fca 100644
--- a/src/openvpn/dco_freebsd.c
+++ b/src/openvpn/dco_freebsd.c
@@ -634,7 +634,17 @@ 
 
             if (nvlist_exists_nvlist(nvl, "bytes"))
             {
-                dco_update_peer_stat(dco->c->multi, dco->dco_message_peer_id, nvlist_get_nvlist(nvl, "bytes"));
+                const nvlist_t *bytes = nvlist_get_nvlist(nvl, "bytes");
+
+                if (dco->c->mode == CM_TOP)
+                {
+                    dco_update_peer_stat(dco->c->multi, dco->dco_message_peer_id, bytes);
+                }
+                else
+                {
+                    dco->c->c2.dco_read_bytes = nvlist_get_number(bytes, "in");
+                    dco->c->c2.dco_write_bytes = nvlist_get_number(bytes, "out");
+                }
             }
 
             dco->dco_message_type = OVPN_CMD_DEL_PEER;