git: c15ceae9e7f9 - stable/13 - carp: carp_master_down_locked() requires net epoch

[Zhenlei Huang]

The branch stable/13 has been updated by zlei:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=c15ceae9e7f98f7e74ff7848b3aff7176c7e263a

commit c15ceae9e7f98f7e74ff7848b3aff7176c7e263a
Author:     Zhenlei Huang <z...@freebsd.org>
AuthorDate: 2023-03-16 10:00:13 +0000
Commit:     Zhenlei Huang <z...@freebsd.org>
CommitDate: 2023-03-17 09:55:00 +0000

    carp: carp_master_down_locked() requires net epoch
    
    Reviewed by:    kp
    Fixes:          1d126e9b9474 carp: Widen epoch coverage
    MFC after:      1 day
    Differential Revision:  https://reviews.freebsd.org/D39113
    
    (cherry picked from commit 49cad3daf2a3abe8270f71ee5b15b8990a19529d)
---
 sys/netinet/ip_carp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sys/netinet/ip_carp.c b/sys/netinet/ip_carp.c
index e84a85ebc11e..b6326b14c802 100644
--- a/sys/netinet/ip_carp.c
+++ b/sys/netinet/ip_carp.c
@@ -1732,6 +1732,7 @@ carp_carprcp(struct carpreq *carpr, struct carp_softc 
*sc, int priv)
 int
 carp_ioctl(struct ifreq *ifr, u_long cmd, struct thread *td)
 {
+       struct epoch_tracker et;
        struct carpreq carpr;
        struct ifnet *ifp;
        struct carp_softc *sc = NULL;
@@ -1816,8 +1817,10 @@ carp_ioctl(struct ifreq *ifr, u_long cmd, struct thread 
*td)
                                carp_delroute(sc);
                                break;
                        case MASTER:
+                               NET_EPOCH_ENTER(et);
                                carp_master_down_locked(sc,
                                    "user requested via ifconfig");
+                               NET_EPOCH_EXIT(et);
                                break;
                        default:
                                break;