login: panic: Assertion in_epoch(net_epoch_preempt) failed at /syzkaller/managers/main/kernel/sys/netinet/in_pcb.c:1267 cpuid = 0 time = 1579749241 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe002444a750 vpanic() at vpanic+0x1ce/frame 0xfffffe002444a7c0 panic() at panic+0x43/frame 0xfffffe002444a820 in_pcbconnect_setup() at in_pcbconnect_setup+0x5b5/frame 0xfffffe002444a8e0 in_pcbconnect_mbuf() at in_pcbconnect_mbuf+0x9f/frame 0xfffffe002444a940 udp6_connect() at udp6_connect+0x388/frame 0xfffffe002444a9b0 soconnectat() at soconnectat+0x183/frame 0xfffffe002444aa10 kern_connectat() at kern_connectat+0x1ec/frame 0xfffffe002444aa70 sys_connect() at sys_connect+0xd9/frame 0xfffffe002444aab0 amd64_syscall() at amd64_syscall+0x499/frame 0xfffffe002444abf0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe002444abf0 --- syscall (0, FreeBSD ELF64, nosys), rip = 0x41c38a, rsp = 0x7fffffffeae8, rbp = 0x7fffffffeb40 --- KDB: enter: panic [ thread pid 771 tid 100083 ] Stopped at kdb_enter+0x67: movq $0,0x1466de6(%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 0xffffffff81898412 rbx 0 rsp 0xfffffe002444a730 rbp 0xfffffe002444a750 rsi 0x1 rdi 0 r8 0 r9 0xffffffff r10 0xffffffff r11 0xfffff80003f46bd0 r12 0xffffffff82068d90 ddb_dbbe r13 0 r14 0xffffffff819363fb r15 0xffffffff819363fb rip 0xffffffff810af337 kdb_enter+0x67 rflags 0x86 ll+0x65 kdb_enter+0x67: movq $0,0x1466de6(%rip) db> show proc Process 771 (syz-executor1488893) at 0xfffff80003e1ba60: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 769 at 0xfffff80003546a60 ABI: FreeBSD ELF64 arguments: ./syz-executor148889310 reaper: 0xfffff800032fa530 reapsubtree: 1 sigparent: 20 vmspace: 0xfffff80010ab6000 (map 0xfffff80010ab6000) (map.pmap 0xfffff80010ab60c0) (pmap 0xfffff80010ab6120) threads: 1 100083 Run CPU 0 syz-executor1488893 db> ps pid ppid pgrp uid state wmesg wchan cmd 771 769 769 0 R CPU 0 syz-executor1488893 769 767 769 0 Ss pause 0xfffff80003546b08 csh 767 680 767 0 Rs CPU 1 sshd 746 1 746 0 Ss+ ttyin 0xfffff800033f7cb0 getty 745 1 745 0 Ss+ ttyin 0xfffff800033facb0 getty 744 1 744 0 Ss+ ttyin 0xfffff80003ac20b0 getty 743 1 743 0 Ss+ ttyin 0xfffff80003ac24b0 getty 742 1 742 0 Ss+ ttyin 0xfffff80003ac28b0 getty 741 1 741 0 Ss+ ttyin 0xfffff80003ac2cb0 getty 740 1 740 0 Ss+ ttyin 0xfffff80003ac10b0 getty 739 1 739 0 Ss+ ttyin 0xfffff80003ac14b0 getty 738 1 738 0 Ss+ ttyin 0xfffff80003ac18b0 getty 736 1 22 0 S+ piperd 0xfffff80003d81000 logger 735 734 22 0 S+ nanslp 0xffffffff824fed21 sleep 734 1 22 0 S+ wait 0xfffff800105d1a60 sh 684 1 684 0 Ss nanslp 0xffffffff824fed20 cron 680 1 680 0 Ss select 0xfffff80003cde5c0 sshd 493 1 493 0 Ss select 0xfffff80010346140 syslogd 422 1 422 0 Ss select 0xfffff80003f50b40 devd 421 1 421 65 Ss select 0xfffff80003f50c40 dhclient 336 1 336 0 Ss select 0xfffff80003f50f40 dhclient 333 1 333 0 Ss select 0xfffff80003f50d40 dhclient 21 0 0 0 DL syncer 0xffffffff825d5198 [syncer] 20 0 0 0 DL vlruwt 0xfffff80003b07000 [vnlru] 19 0 0 0 DL (threaded) [bufdaemon] 100065 D qsleep 0xffffffff825d4698 [bufdaemon] 100070 D - 0xffffffff8200a980 [bufspacedaemon-0] 100077 D sdflush 0xfffff80003d036e8 [/ worker] 18 0 0 0 DL psleep 0xffffffff825f0108 [vmdaemon] 17 0 0 0 DL (threaded) [pagedaemon] 100063 D psleep 0xffffffff8261d058 [dom0] 100068 D launds 0xffffffff8261d064 [laundry: dom0] 100069 D umarcl 0xffffffff8153ce90 [uma] 16 0 0 0 DL - 0xffffffff823595b0 [rand_harvestq] 15 0 0 0 DL waiting 0xffffffff82662620 [sctp_iterator] 9 0 0 0 DL - 0xffffffff825d409c [soaiod4] 8 0 0 0 DL - 0xffffffff825d409c [soaiod3] 7 0 0 0 DL - 0xffffffff825d409c [soaiod2] 6 0 0 0 DL - 0xffffffff825d409c [soaiod1] 5 0 0 0 DL (threaded) [cam] 100031 D - 0xffffffff822349c0 [doneq0] 100062 D - 0xffffffff82234888 [scanner] 4 0 0 0 DL crypto_ 0xfffff800031f8e90 [crypto returns 1] 3 0 0 0 DL crypto_ 0xfffff800031f8e30 [crypto returns 0] 2 0 0 0 DL crypto_ 0xffffffff825ea178 [crypto] 14 0 0 0 DL seqstat 0xfffff80003362888 [sequencer 00] 13 0 0 0 DL (threaded) [geom] 100022 D - 0xffffffff8261b688 [g_event] 100023 D - 0xffffffff8261b698 [g_up] 100024 D - 0xffffffff8261b690 [g_down] 12 0 0 0 WL (threaded) [intr] 100006 I [swi5: fast taskq] 100010 I [swi6: task queue] 100011 I [swi6: Giant taskq] 100017 I [swi3: vm] 100018 I [swi4: clock (0)] 100019 I [swi4: clock (1)] 100020 I [swi1: netisr 0] 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 CanRun [idle: cpu0] 100004 CanRun [idle: cpu1] 1 0 1 0 SLs wait 0xfffff800032fa530 [init] 10 0 0 0 DL audit_w 0xffffffff826632b0 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D swapin 0xffffffff82609c78 [swapper] 100005 D - 0xfffff8000333d000 [thread taskq] 100007 D - 0xfffff8000333cd00 [kqueue_ctx taskq] 100008 D - 0xfffff8000333cc00 [config_0] 100009 D - 0xfffff8000333cb00 [aiod_kick taskq] 100012 D - 0xfffff8000333c800 [if_config_tqg_0] 100013 D - 0xfffff8000333c700 [if_io_tqg_0] 100014 D - 0xfffff8000333c600 [if_io_tqg_1] 100015 D - 0xfffff8000333c500 [softirq_0] 100016 D - 0xfffff8000333c400 [softirq_1] 100021 D - 0xfffff8000333c300 [firmware taskq] 100026 D - 0xfffff8000333c200 [crypto_0] 100027 D - 0xfffff8000333c200 [crypto_1] 100041 D - 0xfffff8000333c000 [vtnet0 rxq 0] 100042 D - 0xfffff8000333be00 [vtnet0 txq 0] 100043 D - 0xfffff8000333bd00 [vtnet0 rxq 1] 100044 D - 0xfffff8000333bc00 [vtnet0 txq 1] 100046 D vtbslp 0xfffff800034d6400 [virtio_balloon] 100050 D - 0xfffff8000333bb00 [mca taskq] 100055 D - 0xffffffff81cd9d51 [deadlkres] 100057 D - 0xfffff80003b38100 [acpi_task_0] 100058 D - 0xfffff80003b38100 [acpi_task_1] 100059 D - 0xfffff80003b38100 [acpi_task_2] 100061 D - 0xfffff8000333c100 [CAM taskq] db> show all locks Process 771 (syz-executor1488893) thread 0xfffff80003f466e0 (100083) exclusive sleep mutex pcbinfohash (pcbinfohash) r = 0 (0xfffffe0004959ad8) locked @ /syzkaller/managers/main/kernel/sys/netinet6/udp6_usrreq.c:1218 exclusive rw udpinp (udpinp) r = 0 (0xfffff80003f0b208) locked @ /syzkaller/managers/main/kernel/sys/netinet6/udp6_usrreq.c:1194 db> show malloc Type InUse MemUse Requests devbuf 4213 4851K 4238 vtbuf 24 1968K 46 sysctloid 26527 1553K 26591 kobj 331 1324K 487 newblk 509 1151K 527 vfscache 4 1025K 4 pcb 21 537K 75 inodedep 48 536K 71 ufs_quota 1 512K 1 vfs_hash 1 512K 1 callout 2 512K 2 intr 4 388K 4 subproc 108 208K 836 acpica 1674 185K 49750 vnet_data 1 168K 1 pagedep 14 132K 18 tfo_ccache 1 128K 1 sem 4 106K 4 DEVFS1 101 101K 110 linker 221 89K 240 bus 962 78K 3298 mtx_pool 2 72K 2 syncache 1 68K 1 acpitask 1 64K 1 ddb_capture 1 64K 1 module 493 62K 493 gtaskqueue 22 34K 22 hostcache 1 32K 1 shm 1 32K 1 msg 4 30K 4 DEVFS3 120 30K 130 umtx 220 28K 220 kdtrace 138 27K 1594 DEVFS_RULE 56 27K 56 kbdmux 6 22K 6 vmem 3 18K 3 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 1394 KTRACE 100 13K 100 ifaddr 30 12K 32 kenv 95 12K 99 eventhandler 123 11K 123 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 508 vt 11 6K 11 sglist 5 6K 5 CAM queue 5 6K 1522 ufs_dirhash 24 5K 24 taskqueue 42 5K 42 plimit 17 5K 322 ifnet 3 5K 3 memdesc 1 4K 1 MCA 32 4K 32 evdev 4 4K 4 filedesc 1 4K 1 routetbl 28 4K 32 UMA 234 4K 234 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 uidinfo 4 3K 4 dirrem 17 3K 28 local_apic 1 2K 1 io_apic 1 2K 1 ipsec-saq 2 2K 2 select 16 2K 16 proc-args 39 2K 472 CAM XPT 22 2K 541 lockf 15 2K 22 Unitno 25 2K 37 acpidev 20 2K 20 crypto 2 2K 2 msi 9 2K 9 ipsecpolicy 1 1K 1 sahead 1 1K 1 secasvar 1 1K 1 clone 8 1K 8 vnodemarker 2 1K 8 NFSD session 1 1K 1 CAM periph 4 1K 270 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 softdep 1 1K 1 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 newdirblk 4 1K 8 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 inpcbpolicy 7 1K 132 feeder 7 1K 7 loginclass 3 1K 3 soname 5 1K 5741 CAM path 4 1K 1030 apmdev 1 1K 1 atkbddev 2 1K 2 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 vnet_data_free 1 1K 1 Per-cpu 1 1K 1 p1003.1b 1 1K 1 CAM CCB 0 0K 1784 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 tempbuff 0 0K 0 pvscsi 0 0K 0 smartpqi 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 CCB List 0 0K 0 iavf 0 0K 0 ixl 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 MVS driver 0 0K 0 fpukern_ctx 0 0K 0 xen_intr 0 0K 0 CAM ccb queue 0 0K 0 xen_hvm 0 0K 0 legacydrv 0 0K 0 qpidrv 0 0K 0 mrsasbuf 0 0K 0 mpt_user 0 0K 0 dmar_idpgtbl 0 0K 0 dmar_dom 0 0K 0 dmar_ctx 0 0K 0 dmar_dmamap 0 0K 0 mps_user 0 0K 0 MPSSAS 0 0K 0 isci 0 0K 0 bxe_ilt 0 0K 0 xenbus 0 0K 0 vm_fictitious 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 12 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_athm 0 0K 0 sctp_atky 0 0K 0 sctp_atcl 0 0K 0 sctp_a_it 0 0K 3 sctp_aadr 0 0K 0 sctp_stro 0 0K 0 sctp_stri 0 0K 0 sctp_map 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 196 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 iov 0 0K 12973 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 567 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