login: panic: Assertion in_epoch(net_epoch_preempt) failed at /syzkaller/managers/main/kernel/sys/netinet6/ip6_output.c:409
cpuid = 1
time = 1582086086
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00247fdf90
vpanic() at vpanic+0x1ce/frame 0xfffffe00247fe000
panic() at panic+0x43/frame 0xfffffe00247fe060
ip6_output() at ip6_output+0x3a9a/frame 0xfffffe00247fe340
sctp_lowlevel_chunk_output() at sctp_lowlevel_chunk_output+0x18ea/frame 0xfffffe00247fe490
sctp_send_initiate() at sctp_send_initiate+0xa53/frame 0xfffffe00247fe590
sctp_lower_sosend() at sctp_lower_sosend+0x3f73/frame 0xfffffe00247fe7a0
sctp_sosend() at sctp_sosend+0x4fe/frame 0xfffffe00247fe8d0
sosend() at sosend+0xc6/frame 0xfffffe00247fe940
kern_sendit() at kern_sendit+0x32d/frame 0xfffffe00247fe9f0
sendit() at sendit+0x226/frame 0xfffffe00247fea50
sys_sendmsg() at sys_sendmsg+0x8b/frame 0xfffffe00247feab0
amd64_syscall() at amd64_syscall+0x2df/frame 0xfffffe00247febf0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe00247febf0
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x41c37a, rsp = 0x7fffffffead8, rbp = 0x7fffffffeb30 ---
KDB: enter: panic
[ thread pid 771 tid 100087 ]
Stopped at kdb_enter+0x67: movq $0,0x1464f96(%rip)
db>
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs 0x20
ds 0x3b ll+0x1a
es 0x3b ll+0x1a
fs 0x13
gs 0x1b
ss 0x28 ll+0x7
rax 0x12
rcx 0x80 ll+0x5f
rdx 0xffffffff8189e13e
rbx 0
rsp 0xfffffe00247fdf70
rbp 0xfffffe00247fdf90
rsi 0x1
rdi 0
r8 0
r9 0xffffffff
r10 0x2e96 ll+0x2e75
r11 0xfffffe0004d9e500
r12 0xffffffff82068f00 ddb_dbbe
r13 0
r14 0xffffffff8193ceda
r15 0xffffffff8193ceda
rip 0xffffffff810b2127 kdb_enter+0x67
rflags 0x82 ll+0x61
kdb_enter+0x67: movq $0,0x1464f96(%rip)
db> show proc
Process 771 (syz-executor1767805) at 0xfffff80003be2a60:
state: NORMAL
uid: 0 gids: 0, 0, 5
parent: pid 769 at 0xfffff8003a2e7a60
ABI: FreeBSD ELF64
arguments: ./syz-executor176780530
reaper: 0xfffff800032d3000 reapsubtree: 1
sigparent: 20
vmspace: 0xfffffe00249173d0
(map 0xfffffe00249173d0)
(map.pmap 0xfffffe0024917490)
(pmap 0xfffffe00249174f0)
threads: 1
100087 Run CPU 1 syz-executor1767805
db> ps
pid ppid pgrp uid state wmesg wchan cmd
771 769 769 0 R CPU 1 syz-executor1767805
769 767 769 0 Ss pause 0xfffff8003a2e7b08 csh
767 680 767 0 Ss select 0xfffff800032c6c40 sshd
746 1 746 0 Ss+ ttyin 0xfffff800033db8b0 getty
745 1 745 0 Ss+ ttyin 0xfffff800033d60b0 getty
744 1 744 0 Ss+ ttyin 0xfffff800033d64b0 getty
743 1 743 0 Ss+ ttyin 0xfffff800033d68b0 getty
742 1 742 0 Ss+ ttyin 0xfffff800033d6cb0 getty
741 1 741 0 Ss+ ttyin 0xfffff800033d90b0 getty
740 1 740 0 Ss+ ttyin 0xfffff800033d94b0 getty
739 1 739 0 Ss+ ttyin 0xfffff80003acdcb0 getty
738 1 738 0 Ss+ ttyin 0xfffff800033d98b0 getty
736 1 22 0 S+ piperd 0xfffff80003cce2f8 logger
735 734 22 0 S+ nanslp 0xffffffff824ffcc1 sleep
734 1 22 0 S+ wait 0xfffff80003caaa60 sh
684 1 684 0 Ss nanslp 0xffffffff824ffcc0 cron
680 1 680 0 Ss select 0xfffff8000357db40 sshd
493 1 493 0 Ss select 0xfffff800032c9540 syslogd
422 1 422 0 Ss select 0xfffff8000357da40 devd
421 1 421 65 Ss select 0xfffff800032c9640 dhclient
336 1 336 0 Ss select 0xfffff8000357d8c0 dhclient
333 1 333 0 Ss select 0xfffff8000357d840 dhclient
21 0 0 0 DL syncer 0xffffffff825d6158 [syncer]
20 0 0 0 DL vlruwt 0xfffff80003affa60 [vnlru]
19 0 0 0 DL (threaded) [bufdaemon]
100065 D qsleep 0xffffffff825d5658 [bufdaemon]
100070 D - 0xffffffff8200a980 [bufspacedaemon-0]
100079 D sdflush 0xfffff80003acd8e8 [/ worker]
18 0 0 0 DL psleep 0xffffffff825f10c8 [vmdaemon]
17 0 0 0 DL (threaded) [pagedaemon]
100063 D psleep 0xffffffff8261cfd8 [dom0]
100068 D launds 0xffffffff8261cfe4 [laundry: dom0]
100069 D umarcl 0xffffffff81542420 [uma]
16 0 0 0 DL - 0xffffffff825d505c [soaiod4]
15 0 0 0 DL - 0xffffffff825d505c [soaiod3]
9 0 0 0 DL - 0xffffffff8235a530 [rand_harvestq]
8 0 0 0 DL - 0xffffffff825d505c [soaiod2]
7 0 0 0 DL - 0xffffffff825d505c [soaiod1]
6 0 0 0 DL waiting 0xffffffff826625a0 [sctp_iterator]
5 0 0 0 DL (threaded) [cam]
100031 D - 0xffffffff82235940 [doneq0]
100062 D - 0xffffffff82235808 [scanner]
4 0 0 0 DL crypto_ 0xfffff800033e0190 [crypto returns 1]
3 0 0 0 DL crypto_ 0xfffff800033e0130 [crypto returns 0]
2 0 0 0 DL crypto_ 0xffffffff825eb138 [crypto]
14 0 0 0 DL seqstat 0xfffff8000334b888 [sequencer 00]
13 0 0 0 DL (threaded) [geom]
100022 D - 0xffffffff8261b608 [g_event]
100023 D - 0xffffffff8261b618 [g_up]
100024 D - 0xffffffff8261b610 [g_down]
12 0 0 0 WL (threaded) [intr]
100005 I [swi5: fast taskq]
100009 I [swi6: task queue]
100010 I [swi6: Giant taskq]
100017 I [swi3: vm]
100018 I [swi1: netisr 0]
100019 I [swi4: clock (0)]
100020 I [swi4: clock (1)]
100032 I [irq24: virtio_pci0]
100033 I [irq25: virtio_pci0]
100034 I [irq26: virtio_pci0]
100035 I [irq27: virtio_pci0]
100036 I [irq28: virtio_pci1]
100037 I [irq29: virtio_pci1]
100038 I [irq30: virtio_pci1]
100039 I [irq31: virtio_pci1]
100040 I [irq32: virtio_pci1]
100045 I [irq10: virtio_pci2]
100047 I [irq1: atkbd0]
100048 I [irq12: psm0]
100049 I [swi0: uart uart++]
11 0 0 0 RL (threaded) [idle]
100003 Run CPU 0 [idle: cpu0]
100004 CanRun [idle: cpu1]
1 0 1 0 SLs wait 0xfffff800032d3000 [init]
10 0 0 0 DL audit_w 0xffffffff82663230 [audit]
0 0 0 0 DLs (threaded) [kernel]
100000 D swapin 0xffffffff8260ac48 [swapper]
100006 D - 0xfffff800031c5e00 [config_0]
100007 D - 0xfffff800031cce00 [kqueue_ctx taskq]
100008 D - 0xfffff800031ccd00 [aiod_kick taskq]
100011 D - 0xfffff800031cca00 [thread taskq]
100012 D - 0xfffff800031c5d00 [softirq_0]
100013 D - 0xfffff800031c5c00 [softirq_1]
100014 D - 0xfffff800031c5b00 [if_io_tqg_0]
100015 D - 0xfffff800031c5a00 [if_io_tqg_1]
100016 D - 0xfffff800031c5900 [if_config_tqg_0]
100021 D - 0xfffff80003365300 [firmware taskq]
100026 D - 0xfffff80003365200 [crypto_0]
100027 D - 0xfffff80003365200 [crypto_1]
100041 D - 0xfffff80003365000 [vtnet0 rxq 0]
100042 D - 0xfffff80003362e00 [vtnet0 txq 0]
100043 D - 0xfffff80003362d00 [vtnet0 rxq 1]
100044 D - 0xfffff80003362c00 [vtnet0 txq 1]
100046 D vtbslp 0xfffff8000358de80 [virtio_balloon]
100050 D - 0xfffff80003362b00 [mca taskq]
100051 D - 0xffffffff81ce0c30 [deadlkres]
100054 D - 0xfffff80003362200 [acpi_task_0]
100055 D - 0xfffff80003362200 [acpi_task_1]
100056 D - 0xfffff80003362200 [acpi_task_2]
100059 D - 0xfffff80003365100 [CAM taskq]
db> show all locks
Process 771 (syz-executor1767805) thread 0xfffffe0004d9e000 (100087)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe0024c1d380) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_output.c:13643
db> show malloc
Type InUse MemUse Requests
devbuf 4213 4851K 4238
vtbuf 24 1968K 46
sysctloid 26636 1559K 26700
kobj 332 1328K 488
newblk 509 1151K 527
vfscache 4 1025K 4
pcb 23 539K 77
inodedep 48 536K 71
ufs_quota 1 512K 1
vfs_hash 1 512K 1
callout 2 512K 2
intr 4 388K 4
subproc 102 205K 830
acpica 1674 185K 50140
vnet_data 1 168K 1
pagedep 14 132K 18
tfo_ccache 1 128K 1
sem 4 106K 4
DEVFS1 101 101K 110
linker 222 89K 241
bus 964 78K 3303
mtx_pool 2 72K 2
syncache 1 68K 1
acpitask 1 64K 1
ddb_capture 1 64K 1
module 494 62K 494
gtaskqueue 22 34K 22
hostcache 1 32K 1
shm 1 32K 1
msg 4 30K 4
DEVFS3 120 30K 130
umtx 234 30K 234
kdtrace 138 27K 1594
DEVFS_RULE 56 27K 56
vmem 3 22K 4
kbdmux 6 22K 6
BPF 10 18K 10
temp 17 17K 1533
ufs_mount 3 17K 4
proc 3 17K 3
tty 16 16K 16
tidhash 1 16K 1
ithread 89 15K 89
bus-sc 30 14K 1397
KTRACE 100 13K 100
ifaddr 30 12K 32
kenv 95 12K 99
eventhandler 122 11K 122
pfs_nodes 20 10K 20
GEOM 60 10K 487
rman 82 10K 423
bmsafemap 3 9K 40
devstat 4 9K 4
UART 12 9K 12
rpc 2 8K 2
shmfd 1 8K 1
pfs_vncache 1 8K 1
audit_evclass 231 8K 289
cred 27 7K 234
CAM DEV 3 6K 510
vt 11 6K 11
sglist 5 6K 5
CAM queue 5 6K 1528
routetbl 28 5K 32
ufs_dirhash 24 5K 24
taskqueue 42 5K 42
dirrem 17 5K 28
plimit 17 5K 322
ifnet 3 5K 3
memdesc 1 4K 1
MCA 32 4K 32
evdev 4 4K 4
filedesc 1 4K 1
UMA 235 4K 235
lltable 11 4K 11
hhook 13 4K 13
ether_multi 40 4K 45
diradd 25 4K 36
in6_multi 25 3K 25
acpisem 22 3K 22
terminal 11 3K 11
kqueue 44 3K 774
session 20 3K 31
pgrp 20 3K 31
select 19 3K 19
uidinfo 4 3K 4
local_apic 1 2K 1
io_apic 1 2K 1
ipsec-saq 2 2K 2
proc-args 39 2K 472
CAM XPT 22 2K 543
lockf 15 2K 22
Unitno 25 2K 37
acpidev 20 2K 20
crypto 2 2K 2
msi 9 2K 9
softdep 1 1K 1
ipsecpolicy 1 1K 1
sahead 1 1K 1
secasvar 1 1K 1
sctp_atcl 2 1K 2
sctp_stro 1 1K 1
clone 8 1K 8
vnodemarker 2 1K 6
NFSD session 1 1K 1
CAM periph 4 1K 271
indirdep 3 1K 3
toponodes 6 1K 6
isadev 6 1K 6
mount 16 1K 86
pci_link 10 1K 10
ip6ndp 4 1K 5
sctp_ifa 5 1K 5
CAM SIM 2 1K 2
newdirblk 4 1K 8
mkdir 4 1K 16
in_multi 2 1K 3
pfil 4 1K 4
chacha20random 1 1K 1
epoch 4 1K 4
cdev 2 1K 2
encap_export_host 8 1K 8
osd 3 1K 9
mld 2 1K 2
sctp_ifn 2 1K 2
igmp 2 1K 2
vnodes 1 1K 1
NFSD lckfile 1 1K 1
NFSD V4client 1 1K 1
DEVFS 9 1K 10
feeder 7 1K 7
inpcbpolicy 6 1K 131
loginclass 3 1K 3
soname 5 1K 5741
CAM path 4 1K 1034
apmdev 1 1K 1
atkbddev 2 1K 2
sctp_atky 3 1K 3
pmchooks 1 1K 1
prison 4 1K 4
DEVFSP 2 1K 2
CAM dev queue 2 1K 2
CAM I/O Scheduler 1 1K 1
filecaps 4 1K 66
tun 3 1K 3
nexusdev 5 1K 5
entropy 2 1K 35
tcpfunc 1 1K 1
sctp_vrf 1 1K 1
vnet 1 1K 1
acpiintr 1 1K 1
pmc 1 1K 1
cpus 2 1K 2
freework 1 1K 26
sctp_athm 2 1K 2
sctp_map 2 1K 2
vnet_data_free 1 1K 1
Per-cpu 1 1K 1
iov 1 1K 12976
p1003.1b 1 1K 1
CAM CCB 0 0K 1788
madt_table 0 0K 2
PUC 0 0K 0
ppbusdev 0 0K 0
agtiapi_MemAlloc malloc 0 0K 0
osti_cacheable 0 0K 0
tempbuff 0 0K 0
pvscsi 0 0K 0
smartpqi 0 0K 0
tempbuff 0 0K 0
ag_tgt_map_t malloc 0 0K 0
ag_slr_map_t malloc 0 0K 0
lDevFlags * malloc 0 0K 0
tiDeviceHandle_t * malloc 0 0K 0
ag_portal_data_t malloc 0 0K 0
ag_device_t malloc 0 0K 0
STLock malloc 0 0K 0
iavf 0 0K 0
ixl 0 0K 0
CCB List 0 0K 0
sr_iov 0 0K 0
OCS 0 0K 0
OCS 0 0K 0
nvme 0 0K 0
nvd 0 0K 0
netmap 0 0K 0
mwldev 0 0K 0
fpukern_ctx 0 0K 0
MVS driver 0 0K 0
xen_intr 0 0K 0
xen_hvm 0 0K 0
legacydrv 0 0K 0
qpidrv 0 0K 0
CAM ccb queue 0 0K 0
mrsasbuf 0 0K 0
dmar_idpgtbl 0 0K 0
dmar_dom 0 0K 0
dmar_ctx 0 0K 0
dmar_dmamap 0 0K 0
mpt_user 0 0K 0
mps_user 0 0K 0
isci 0 0K 0
bxe_ilt 0 0K 0
xenbus 0 0K 0
vm_fictitious 0 0K 0
MPSSAS 0 0K 0
mps 0 0K 0
mpr_user 0 0K 0
MPRSAS 0 0K 0
UMAHash 0 0K 0
vm_pgdata 0 0K 0
jblocks 0 0K 0
savedino 0 0K 11
sentinel 0 0K 0
jfsync 0 0K 0
jtrunc 0 0K 0
sbdep 0 0K 2
jsegdep 0 0K 0
jseg 0 0K 0
jfreefrag 0 0K 0
jfreeblk 0 0K 0
jnewblk 0 0K 0
jmvref 0 0K 0
jremref 0 0K 0
jaddref 0 0K 0
freedep 0 0K 0
freefile 0 0K 9
freeblks 0 0K 25
freefrag 0 0K 7
allocindir 0 0K 0
allocdirect 0 0K 0
ufs_trim 0 0K 0
mactemp 0 0K 0
audit_trigger 0 0K 0
audit_pipe_presel 0 0K 0
audit_pipeent 0 0K 0
audit_pipe 0 0K 0
audit_evname 0 0K 0
audit_bsm 0 0K 0
audit_gidset 0 0K 0
audit_text 0 0K 0
audit_path 0 0K 0
audit_data 0 0K 0
audit_cred 0 0K 0
xform 0 0K 0
NLM 0 0K 0
nfsclient_nlminfo 0 0K 0
nfsclient_lock 0 0K 0
NFS FHA 0 0K 0
ipsec-spdcache 0 0K 0
ipsec-reg 0 0K 0
ipsec-misc 0 0K 0
ipsecrequest 0 0K 0
ip6opt 0 0K 3
ip6_msource 0 0K 0
ip6_moptions 0 0K 0
in6_mfilter 0 0K 0
frag6 0 0K 0
tcplog 0 0K 0
LRO 0 0K 0
sctp_mcore 0 0K 0
sctp_socko 0 0K 0
sctp_iter 0 0K 3
sctp_mvrf 0 0K 0
sctp_timw 0 0K 0
sctp_cpal 0 0K 0
sctp_cmsg 0 0K 0
sctp_stre 0 0K 0
sctp_athi 0 0K 0
sctp_a_it 0 0K 3
sctp_aadr 0 0K 0
sctp_stri 0 0K 0
newreno data 0 0K 0
ip_msource 0 0K 0
ip_moptions 0 0K 0
in_mfilter 0 0K 0
ipid 0 0K 0
80211scan 0 0K 0
80211ratectl 0 0K 0
80211power 0 0K 0
80211nodeie 0 0K 0
80211node 0 0K 0
80211mesh_gt 0 0K 0
80211mesh_rt 0 0K 0
80211perr 0 0K 0
80211prep 0 0K 0
80211preq 0 0K 0
80211dfs 0 0K 0
80211crypto 0 0K 0
80211vap 0 0K 0
iflib 0 0K 0
vlan 0 0K 0
gif 0 0K 0
ifdescr 0 0K 0
zlib 0 0K 0
fadvise 0 0K 0
mpr 0 0K 0
statfs 0 0K 195
export_host 0 0K 0
cl_savebuf 0 0K 3
biobuf 0 0K 0
aios 0 0K 0
lio 0 0K 0
acl 0 0K 0
mfibuf 0 0K 0
mbuf_tag 0 0K 25
accf 0 0K 0
pts 0 0K 0
ioctlops 0 0K 86
Witness 0 0K 0
stack 0 0K 0
md_sectors 0 0K 0
sbuf 0 0K 288
md_disk 0 0K 0
compressor 0 0K 0
malodev 0 0K 0
SWAP 0 0K 0
LED 0 0K 0
sysctltmp 0 0K 570
sysctl 0 0K 1
ekcd 0 0K 0
dumper 0 0K 0
rctl 0 0K 0
ix_sriov 0 0K 0
aacraidcam 0 0K 0
ix 0 0K 0
ipsbuf 0 0K 0
iirbuf 0 0K 0
cache 0 0K 0
aacraid_buf 0 0K 0
kcovinfo 0 0K 0
prison_racct 0 0K 0
Fail Points 0 0K 0
sigio 0 0K 1
filedesc_to_leader 0 0K 0
tty console 0 0K 0
aaccam 0 0K 0
aacbuf 0 0K 0
zstd 0 0K 0
nvlist 0 0K 0
SCSI ENC 0 0K 0
SCSI sa 0 0K 0
isofs_node 0 0K 0
isofs_mount 0 0K 0
tr_raid5_data 0 0K 0
tr_raid1e_data 0 0K 0
tr_raid1_data 0 0K 0
tr_raid0_data 0 0K 0
tr_concat_data 0 0K 0
md_sii_data 0 0K 0
md_promise_data 0 0K 0
md_nvidia_data 0 0K 0
md_jmicron_data 0 0K 0
md_intel_data 0 0K 0
md_ddf_data 0 0K 0
raid_data 0 0K 72
geom_flashmap 0 0K 0
newnfsmnt 0 0K 0
newnfsclient_req 0 0K 0
NFSCL layrecall 0 0K 0
NFSCL session 0 0K 0
NFSCL sockreq 0 0K 0
NFSCL devinfo 0 0K 0
NFSCL flayout 0 0K 0
NFSCL layout 0 0K 0
NFSD rollback 0 0K 0
NFSCL diroffdiroff 0 0K 0
NEWdirectio 0 0K 0
NEWNFSnode 0 0K 0
NFSCL lck 0 0K 0
NFSCL lckown 0 0K 0
NFSCL client 0 0K 0
NFSCL deleg 0 0K 0
NFSCL open 0 0K 0
NFSCL owner 0 0K 0
NFS fh 0 0K 0
NFS req 0 0K 0
NFSD usrgroup 0 0K 0
NFSD string 0 0K 0
NFSD V4lock 0 0K 0
NFSD V4state 0 0K 0
NFSD srvcache 0 0K 0
msdosfs_fat 0 0K 0
msdosfs_mount 0 0K 0
msdosfs_node 0 0K 0
DEVFS4 0 0K 0
DEVFS2 0 0K 0
gntdev 0 0K 0
privcmd_dev 0 0K 0
evtchn_dev 0 0K 0
xenstore 0 0K 0
scsi_pass 0 0K 0
ciss_data 0 0K 0
xnb 0 0K 0
xbbd 0 0K 0
xbd 0 0K 0
Balloon 0 0K 0
sysmouse 0 0K 0
vtfont 0 0K 0
ath_hal 0 0K 0
athdev 0 0K 0
ata_pci 0 0K 0
ata_dma 0 0K 0
ata_generic 0 0K 0
amr 0 0K 0
scsi_da 0 0K 69
ata_da 0 0K 0
scsi_ch 0 0K 0
scsi_cd 0 0K 0
USBdev 0 0K 0
USB 0 0K 0
AHCI driver 0 0K 0
agp 0 0K 0
nvme_da 0 0K 0
acpipwr 0 0K 0
twsbuf 0 0K 0
twe_commands 0 0K 0
twa_commands 0 0K 0
tcp_log_dev 0 0K 0
midi buffers 0 0K 0
mixer 0 0K 0
ac97 0 0K 0
hdacc 0 0K 0
hdac 0 0K 0
hdaa 0 0K 0
acpi_perf 0 0K 0
acpicmbat 0 0K 0
SIIS driver 0 0K 0
db> show ktr
No such command; use "help" to list available commands