last executing test programs:

964.24697ms ago: executing program 0 (id=1):
r0 = kqueue()
kevent(r0, &(0x7f0000000040)=[{0x0, 0xfffffffffffffff9, 0x9, 0x8, 0x0, 0x0, [0x1, 0x0, 0x7, 0x40000000000000]}], 0x1, 0x0, 0x0, 0x0)

439.397899ms ago: executing program 3 (id=11):
r0 = socket$inet6(0x1c, 0x3, 0x0)
setsockopt$inet6_int(r0, 0x29, 0x18, &(0x7f0000000040)=0xa, 0x4)
setsockopt$inet6_int(r0, 0x29, 0x39, &(0x7f0000000080)=0x402, 0x4)

384.282093ms ago: executing program 2 (id=12):
pipe2(&(0x7f0000000000)={<r0=>0xffffffffffffffff}, 0x100000)
r1 = openat$filemon(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
ioctl$FILEMON_SET_FD(r1, 0xc0045301, &(0x7f00000004c0)=r0)

360.230914ms ago: executing program 2 (id=13):
r0 = socket(0x1c, 0x1, 0x0)
bind$inet6(r0, &(0x7f00000000c0)={0x1c, 0x1c, 0x3, 0xfffffffc, @loopback}, 0x1c)
connect$inet6(r0, &(0x7f0000000180)={0x1c, 0x1c, 0x3, 0x0, @remote={0xfe, 0x80, '\x00', 0x0}, 0x5}, 0x1c)

352.516881ms ago: executing program 3 (id=14):
r0 = socket$inet6_sctp(0x1c, 0x5, 0x84)
setsockopt$inet6_sctp_SCTP_DEFAULT_PRINFO(r0, 0x84, 0x22, &(0x7f0000000300)={0x1, 0xaf36}, 0xc)
sendmsg$inet6_sctp(r0, &(0x7f0000000740)={&(0x7f0000000380)=@in6={0x1c, 0x1c, 0x2, 0x87, @local={0xfe, 0x80, '\x00', 0x0}, 0x10}, 0x1c, &(0x7f0000000680)=[{&(0x7f00000003c0)="8cd9", 0x2}], 0x1, 0x0, 0x0, 0x108}, 0x20003)

327.748361ms ago: executing program 2 (id=15):
openat(0xffffffffffffff9c, &(0x7f0000000200)='./file0\x00', 0x300201, 0xd0)
ktrace(&(0x7f0000000200)='./file0\x00', 0x4, 0xd27d43220c7df9b, 0x0)
cpuset_getaffinity(0x3, 0x2, 0x200000000006, 0x0, 0x0)

276.446081ms ago: executing program 2 (id=16):
r0 = openat$crypto(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0)
ioctl$CIOCGSESSION2(r0, 0xc030636a, &(0x7f0000000080)={0x16, 0x0, 0x20, &(0x7f0000000180)="ec7b00000900ff2425c1f0a58b519798d25cd0a9cfbc8c96469dc0119723f87f", 0x0, 0x0, 0x0, 0xfdffff85, [0x0, 0x0, 0x1000]})
ioctl$CIOCCRYPT(r0, 0xc01c6367, &(0x7f0000000280)={0x0, 0x2, 0x0, 0x8000, &(0x7f00000002c0), 0x0, 0x0, &(0x7f0000001400)})

226.44809ms ago: executing program 2 (id=17):
thr_self(&(0x7f0000000000)=<r0=>0x0)
thr_suspend(&(0x7f00000002c0)={0x1000, 0x3})
thr_wake(r0)

118.742103ms ago: executing program 2 (id=18):
r0 = socket$inet_icmp_raw(0x2, 0x3, 0x1)
connect$inet(r0, &(0x7f0000000040)={0x10, 0x2, 0x0}, 0x10)
sendmsg$inet_sctp(r0, &(0x7f0000000cc0)={&(0x7f0000000ac0)=@in={0x10, 0x2, 0x3, @remote={0xac, 0x14, 0x0}}, 0x10, 0x0, 0x0, &(0x7f0000000bc0)=[@dstaddrv4={0x10, 0x84, 0x9, @loopback}], 0x10, 0x5}, 0x4)

109.90091ms ago: executing program 3 (id=19):
r0 = socket$inet6_udplite(0x1c, 0x2, 0x88)
bind$inet6(r0, &(0x7f0000001140)={0x1c, 0x1c, 0x3, 0x0, @mcast2}, 0x1c)
sendto$inet6(r0, &(0x7f0000000240)="24d56aaa386689c52e4ab99f1b3e520753b445a9a3730252bfedfe09e37be78b736703a1f7fc488b8f948c89472fda7146af8f73ce45130405747d0efbb176f7429e6555e5c1d34e15654b58c3f7ee7a05daa29de99a8e2764f282", 0x5b, 0x84, &(0x7f00000002c0)={0x1c, 0x1c, 0x3, 0x1, @mcast2, 0x7}, 0x1c)

67.571307ms ago: executing program 3 (id=20):
open$dir(&(0x7f00000001c0)='./file0\x00', 0x488200, 0x176)
ktrace(&(0x7f0000000040)='./file0\x00', 0x4, 0x40000cd0, 0x0)
ktrace(&(0x7f0000000080)='./file0\x00', 0x2, 0x0, 0x0)

26.494697ms ago: executing program 3 (id=21):
r0 = open(&(0x7f00000000c0)='./file0\x00', 0x205, 0x0)
ioctl$BIOCSETF(0xffffffffffffffff, 0x80104267, &(0x7f0000000040)={0x3, &(0x7f0000000140)=[{0x2, 0x8, 0x0, 0x4}, {0x7, 0x0, 0x3, 0x20000001}, {0xfffe, 0x9, 0x6, 0x10003}]})
fcntl$lock(r0, 0xc, &(0x7f0000000140)={0x1, 0x0, 0x80000001, 0x8fb})

0s ago: executing program 3 (id=22):
r0 = kqueue()
kevent(r0, &(0x7f0000000140)=[{0x0, 0xfffffffffffffff9, 0xc9, 0x2, 0x200000000000, 0x0, [0x8a, 0x1]}], 0x1, 0x0, 0x0, 0x0)
kevent(r0, &(0x7f0000000040)=[{0x0, 0xfffffffffffffff9, 0x80a0, 0x10, 0xe703000000000000, 0x0, [0xffff, 0x40000000000000, 0x80000000]}], 0x1, 0x0, 0x0, 0x0)

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.1.201' (ED25519) to the list of known hosts.
ip6_pcbopts: all specified options are cleared.
Expensive callout(9) function: 0xffffffff81497fa0(0xfffffe006dded5a0) 0.002427769 s
Expensive callout(9) function: 0xffffffff81497fa0(0xfffffe006dded640) 0.002446167 s


FreeBSD/amd64 (ci-freebsd-i386-0.us-central1-b.c.syzkaller.internal) (ttyu0)

login: if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5800
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6800
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6800
Expensive callout(9) function: 0xffffffff81add990(0) 0.006024547 s
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6800
Oct 17 21:18:55 ci-freebsd-i386-0 dhclient[809]: Interface tap0 is down, dhclient exiting
SYZFAIL: failed to send rpc
Oct 17 21:18:56 ci-freebsd-i386-0 dhclient[809]: connection closed
Oct 17 21:18:56 ci-freebsd-i386-0 dhclient[809]: exiting.
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6000
fd=3 want=18608 sent=0 n=-1 (errno 32: Broken pipe)
if_delmulti_locked: detaching ifnet instance 0xfffffe00585aa800
if_delmulti_locked: detaching ifnet instance 0xfffffe00585aa800
if_delmulti_locked: detaching ifnet instance 0xfffffe00585aa800
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f5000
if_delmulti_locked: detaching ifnet instance 0xfffffe00585aa800
if_delmulti_locked: detaching ifnet instance 0xfffffe00585aa800
if_delmulti_locked: detaching ifnet instance 0xfffffe00585aa800
if_delmulti_locked: detaching ifnet instance 0xfffffe0077757800
if_delmulti_locked: detaching ifnet instance 0xfffffe0077757800
if_delmulti_locked: detaching ifnet instance 0xfffffe0077757800
if_delmulti_locked: detaching ifnet instance 0xfffffe0077757800
if_delmulti_locked: detaching ifnet instance 0xfffffe0077757800
if_delmulti_locked: detaching ifnet instance 0xfffffe0077757800
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6000
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6800
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6800
if_delmulti_locked: detaching ifnet instance 0xfffffe00077f6800