The branch main has been updated by tuexen:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=a730d82378d3cdf5356775ec0c23ad2ca40c5edb

commit a730d82378d3cdf5356775ec0c23ad2ca40c5edb
Author:     Michael Tuexen <[email protected]>
AuthorDate: 2021-07-19 22:29:18 +0000
Commit:     Michael Tuexen <[email protected]>
CommitDate: 2021-07-19 22:29:18 +0000

    tcp: fix RACK and BBR when using VIMAGE enabled kernel
    
    Fix a bug in VNET handling, which occurs when using specific NICs.
    PR:                     257195
    Reviewed by:            rrs
    MFC after:              3 days
    Sponsored by:           Netflix, Inc.
    Differential Revision:  https://reviews.freebsd.org/D31212
---
 sys/netinet/tcp_stacks/rack_bbr_common.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sys/netinet/tcp_stacks/rack_bbr_common.c 
b/sys/netinet/tcp_stacks/rack_bbr_common.c
index baa267b43752..bf93359368f9 100644
--- a/sys/netinet/tcp_stacks/rack_bbr_common.c
+++ b/sys/netinet/tcp_stacks/rack_bbr_common.c
@@ -508,16 +508,18 @@ skip_vnet:
                                m_freem(m);
                                m = m_save;
                        }
-                       if (no_vn == 0)
+                       if (no_vn == 0) {
                                CURVNET_RESTORE();
+                       }
                        INP_UNLOCK_ASSERT(inp);
                        return(retval);
                }
 skipped_pkt:
                m = m_save;
        }
-       if (no_vn == 0)
+       if (no_vn == 0) {
                CURVNET_RESTORE();
+       }
        return(retval);
 }
 
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