last executing test programs:

199.386347ms ago: executing program 0 (id=1):
sendto(0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0)
recvfrom(0xffffffffffffffff, 0x0, 0x0, 0x860, 0x0, 0x0)
sendto(0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0)
shutdown(0xffffffffffffffff, 0x2)
ioctl$FILEMON_SET_FD(0xffffffffffffffff, 0xc0045301, 0x0)
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000640), 0x0, 0x0)
ioctl$DIOCGETRULESETS(r0, 0xc444443a, &(0x7f0000000200))

102.962638ms ago: executing program 3 (id=2):
open$dir(&(0x7f0000000040)='./file1\x00', 0x2, 0xa5)
getpgrp(0x0)
socket$inet_sctp(0x2, 0x0, 0x84)
bind$inet6(0xffffffffffffff9c, 0x0, 0xf)
profil(0x0, 0x0, 0x0, 0x1)
r0 = socket$inet_sctp(0x2, 0x1, 0x84)
setsockopt$inet_sctp_SCTP_DELAYED_SACK(r0, 0x84, 0xf, &(0x7f0000000500)={0x0, 0x8, 0x1101}, 0xc)

8.262924ms ago: executing program 2 (id=5):
socket$inet_sctp(0x2, 0x1, 0x84)
r0 = socket$inet_sctp(0x2, 0x1, 0x84)
setsockopt$inet_sctp_SCTP_EXPLICIT_EOR(r0, 0x84, 0x1b, &(0x7f0000000000)=0x9, 0x4)
bind$inet(r0, &(0x7f0000000200)={0x10, 0x2, 0x1, @local={0xac, 0x14, 0x0}}, 0x10)
r1 = socket$inet6(0x1c, 0x3, 0x0)
setsockopt$inet6_int(r1, 0x29, 0xa, &(0x7f0000000080), 0x4)
syz_emit_ethernet(0x5e, &(0x7f00000001c0)={@local, @empty, [], {@ipv6={0x86dd, {0x0, 0x6, "d60f16", 0x28, 0x67, 0x0, @rand_addr="abbde059ff7a43f702cee73684eec42d", @local={0xfe, 0x80, '\x00', 0x0}, {[], @icmpv6=@ndisc_redir={0x89, 0x0, 0x0, '\x00', @mcast1, @local={0xfe, 0x80, '\x00', 0x0}}}}}}})

1.907855ms ago: executing program 1 (id=4):
profil(&(0x7f0000000880)="3526a6a18dd13790fe4af62c835f415b82e59007c40ce2fe6bc4ce210e7864009001fbaa0c950783674f89a9f2b44b4ea7bb1b7ac91a6bfc4655e4795bb1efadcd14ad7a3d3a344cf4e6c8fc60b886153a887ec0e896488a9135945567657ac1d2f67d65d17f133639d7d585f15f89518b2f459648ce91f1fb3f2eed227f876a673abad660494a6b448f97f54852fa353ea422a9ef3c0000000000000080572746cd", 0xa2, 0x0, 0x2)
open(&(0x7f00000000c0)='./file0\x00', 0x201, 0x0)
r0 = open$dir(&(0x7f00000016c0)='./file0\x00', 0x1, 0x0)
pwritev(r0, &(0x7f0000000080)=[{&(0x7f00000006c0), 0x100000}], 0x1, 0x0)
r1 = open(&(0x7f0000000480)='./file0\x00', 0x80400000000206, 0x0)
mmap(&(0x7f0000000000/0x200000)=nil, 0x200000, 0x3, 0x20011, r1, 0x0)
open(&(0x7f0000000180)='./file0\x00', 0x70e, 0x0)

0s ago: executing program 0 (id=12):
r0 = dup(0xffffffffffffffff)
kmq_timedsend(r0, 0x0, 0x0, 0x400000, 0x0)
dup2(0xffffffffffffffff, 0xffffffffffffffff)
openat$filemon(0xffffffffffffff9c, 0x0, 0x2, 0x0)
r1 = __specialfd$eventfd(0x1, &(0x7f0000000000), 0x8)
r2 = openat$filemon(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
ioctl$FILEMON_SET_FD(r2, 0xc0045301, &(0x7f0000000080)=r1)
rfork(0x5000)

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.1.205' (ED25519) to the list of known hosts.
Stopping cron.
Waiting for PIDS: 686.
Stopping sshd.
Waiting for PIDS: 682.
Stopping devd.
Waiting for PIDS: 424.
Writing entropy file:.
Writing early boot entropy file:.
.
Terminated
if_delmulti_locked: detaching ifnet instance 0xfffffe00079de000
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d800
if_delmulti_locked: detaching ifnet instance 0xfffffe00079de000
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d800
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d800
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d000
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d000Nov  5 15:32:47 
ci-freebsd-i386-if_delmulti_locked: detaching ifnet instance 0xfffffe005878d000
0 syslogd: exiting on signal 15
if_delmulti_locked: detaching ifnet instance 0xfffffe00079de000
Connection to 10.128.1.205 closed by remote host.
if_delmulti_locked: detaching ifnet instance 0xfffffe00079dd000
if_delmulti_locked: detaching ifnet instance 0xfffffe00079dd000
if_delmulti_locked: detaching ifnet instance 0xfffffe00079dd000
Waiting (max 60 seconds) for system process `vnlru' to stop... done
Waiting (max 60 seconds) for system process `syncer' to stop... 
Syncing disks, vnodes remaining... 1 0 0 if_delmulti_locked: detaching ifnet instance 0xfffffe00079dd000
if_delmulti_locked: detaching ifnet instance 0xfffffe00079dd000
if_delmulti_locked: detaching ifnet instance 0xfffffe00079dd000
done
All buffers synced.
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d800
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d800
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d800
Uptime: 5m44s
if_delmulti_locked: detaching ifnet instance 0xfffffe00079de000
if_delmulti_locked: detaching ifnet instance 0xfffffe00079de000
if_delmulti_locked: detaching ifnet instance 0xfffffe00079de000
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d000
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d000
if_delmulti_locked: detaching ifnet instance 0xfffffe005878d000
acpi0: Powering system off
serialport: VM disconnected.