login: panic: mutex pcbinfohash not owned at /syzkaller/managers/i386/kernel/sys/netinet6/in6_pcb.c:717 cpuid = 0 time = 1573258279 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0022b00250 vpanic() at vpanic+0x1c7/frame 0xfffffe0022b002c0 panic() at panic+0x43/frame 0xfffffe0022b00320 __mtx_assert() at __mtx_assert+0x18b/frame 0xfffffe0022b00360 in6_pcblookup_local() at in6_pcblookup_local+0x53/frame 0xfffffe0022b003b0 in_pcb_lport() at in_pcb_lport+0x3fd/frame 0xfffffe0022b00440 in_pcbbind_setup() at in_pcbbind_setup+0x28b/frame 0xfffffe0022b004e0 in_pcbconnect_setup() at in_pcbconnect_setup+0x4aa/frame 0xfffffe0022b005a0 udp_send() at udp_send+0xee4/frame 0xfffffe0022b006b0 udp6_send() at udp6_send+0x4e8/frame 0xfffffe0022b00860 sosend_dgram() at sosend_dgram+0x54f/frame 0xfffffe0022b008d0 sosend() at sosend+0xc6/frame 0xfffffe0022b00940 kern_sendit() at kern_sendit+0x32d/frame 0xfffffe0022b009f0 sendit() at sendit+0x226/frame 0xfffffe0022b00a50 sys_sendto() at sys_sendto+0x5c/frame 0xfffffe0022b00ab0 ia32_syscall() at ia32_syscall+0x466/frame 0xfffffe0022b00bf0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x814303e KDB: enter: panic [ thread pid 776 tid 100116 ] Stopped at kdb_enter+0x67: movq $0,0x14698f6(%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 0 rax 0x12 rcx 0x80 ll+0x5f rdx 0xffffffff818cb695 rbx 0 rsp 0xfffffe0022b00230 rbp 0xfffffe0022b00250 rsi 0 rdi 0 r8 0 r9 0xffffffff r10 0xcbb28aaf r11 0xb59de495 r12 0xffffffff82068cf0 ddb_dbbe r13 0 r14 0xffffffff81912bef r15 0xffffffff81912bef rip 0xffffffff810a9cf7 kdb_enter+0x67 rflags 0x200086 kernphys+0x86 kdb_enter+0x67: movq $0,0x14698f6(%rip) db> show proc Process 776 (syz-executor.0) at 0xfffff80036548a60: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 761 at 0xfffff8003654a000 ABI: FreeBSD ELF32 arguments: /root/syz-executor.0 reaper: 0xfffff800031f9530 reapsubtree: 1 sigparent: 20 vmspace: 0xfffff800366b3000 (map 0xfffff800366b3000) (map.pmap 0xfffff800366b30d0) (pmap 0xfffff800366b3130) threads: 1 100116 Run CPU 0 syz-executor.0 db> ps pid ppid pgrp uid state wmesg wchan cmd 777 410 410 0 R CPU 1 sh 776 761 761 0 R CPU 0 syz-executor.0 761 759 761 0 Rs syz-executor.0 759 757 757 0 S (threaded) syz-execprog 100073 S uwait 0xfffff800030cd100 syz-execprog 100107 S uwait 0xfffff80003a27b00 syz-execprog 100108 S uwait 0xfffff80003a27c00 syz-execprog 100109 S uwait 0xfffff80003a27d00 syz-execprog 100110 S kqread 0xfffff800031d9200 syz-execprog 100111 S uwait 0xfffff8003614ce00 syz-execprog 100112 S uwait 0xfffff8003614cf00 syz-execprog 100113 S uwait 0xfffff80003a2aa80 syz-execprog 100114 S uwait 0xfffff8003614c800 syz-execprog 757 755 757 0 Ss pause 0xfffff800365495d8 csh 755 668 755 0 Ss select 0xfffff800362aa940 sshd 734 1 734 0 Ss+ ttyin 0xfffff800037470b0 getty 733 1 733 0 Ss+ ttyin 0xfffff80003a080b0 getty 732 1 732 0 Ss+ ttyin 0xfffff80003a088b0 getty 731 1 731 0 Ss+ ttyin 0xfffff80003a090b0 getty 730 1 730 0 Ss+ ttyin 0xfffff800032828b0 getty 729 1 729 0 Ss+ ttyin 0xfffff800032e90b0 getty 728 1 728 0 Ss+ ttyin 0xfffff800032e98b0 getty 727 1 727 0 Ss+ ttyin 0xfffff800032eb0b0 getty 726 1 726 0 Ss+ ttyin 0xfffff800032eb8b0 getty 724 1 22 0 S+ piperd 0xfffff80003be15f0 logger 723 722 22 0 S+ nanslp 0xffffffff824fc1e0 sleep 722 1 22 0 S+ wait 0xfffff80036343530 sh 672 1 672 0 Ss nanslp 0xffffffff824fc1e0 cron 668 1 668 0 Ss select 0xfffff800362ab040 sshd 481 1 481 0 Ss select 0xfffff80003074340 syslogd 410 1 410 0 Ss wait 0xfffff80003c46a60 devd 409 1 409 65 Ss select 0xfffff800039f9c40 dhclient 324 1 324 0 Ss select 0xfffff800030746c0 dhclient 321 1 321 0 Ss select 0xfffff80003074540 dhclient 21 0 0 0 DL syncer 0xffffffff825d26b0 [syncer] 20 0 0 0 DL vlruwt 0xfffff800039d6a60 [vnlru] 19 0 0 0 DL (threaded) [bufdaemon] 100063 D qsleep 0xffffffff825d1b58 [bufdaemon] 100067 D - 0xffffffff8200a900 [bufspacedaemon-0] 100078 D sdflush 0xfffff800039fc8e8 [/ worker] 18 0 0 0 DL psleep 0xffffffff825ed008 [vmdaemon] 17 0 0 0 DL (threaded) [pagedaemon] 100061 D psleep 0xffffffff82618d98 [dom0] 100064 D launds 0xffffffff82618da4 [laundry: dom0] 100065 D umarcl 0xffffffff81529b80 [uma] 16 0 0 0 DL - 0xffffffff825d155c [soaiod4] 15 0 0 0 DL - 0xffffffff825d155c [soaiod3] 9 0 0 0 DL - 0xffffffff825d155c [soaiod2] 8 0 0 0 DL - 0xffffffff825d155c [soaiod1] 7 0 0 0 DL - 0xffffffff82357e20 [rand_harvestq] 6 0 0 0 DL waiting 0xffffffff8265e370 [sctp_iterator] 5 0 0 0 DL (threaded) [cam] 100031 D - 0xffffffff822331c0 [doneq0] 100056 D - 0xffffffff82233088 [scanner] 4 0 0 0 DL crypto_ 0xfffff800032c9090 [crypto returns 1] 3 0 0 0 DL crypto_ 0xfffff800032c9030 [crypto returns 0] 2 0 0 0 DL crypto_ 0xffffffff825e7648 [crypto] 14 0 0 0 DL seqstat 0xfffff8000327f888 [sequencer 00] 13 0 0 0 DL (threaded) [geom] 100022 D - 0xffffffff82617390 [g_event] 100023 D - 0xffffffff826173a0 [g_up] 100024 D - 0xffffffff82617398 [g_down] 12 0 0 0 WL (threaded) [intr] 100005 I [swi6: Giant taskq] 100007 I [swi5: fast taskq] 100011 I [swi6: task queue] 100017 I [swi4: clock (0)] 100018 I [swi4: clock (1)] 100019 I [swi3: vm] 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 [irq1: atkbd0] 100046 I [irq12: psm0] 100047 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 0xfffff800031f9530 [init] 10 0 0 0 DL audit_w 0xffffffff8265f000 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D swapin 0xffffffff82606b68 [swapper] 100006 D - 0xfffff8000322ce00 [thread taskq] 100008 D - 0xfffff8000322cc00 [config_0] 100009 D - 0xfffff8000322cb00 [kqueue_ctx taskq] 100010 D - 0xfffff8000322ca00 [aiod_kick taskq] 100012 D - 0xfffff8000322c800 [softirq_0] 100013 D - 0xfffff8000322c700 [softirq_1] 100014 D - 0xfffff8000322c600 [if_io_tqg_0] 100015 D - 0xfffff8000322c500 [if_io_tqg_1] 100016 D - 0xfffff8000322c400 [if_config_tqg_0] 100021 D - 0xfffff8000329d100 [firmware taskq] 100026 D - 0xfffff8000329d000 [crypto_0] 100027 D - 0xfffff8000329d000 [crypto_1] 100041 D - 0xfffff8000329cb00 [vtnet0 rxq 0] 100042 D - 0xfffff8000329ca00 [vtnet0 txq 0] 100043 D - 0xfffff8000329c900 [vtnet0 rxq 1] 100044 D - 0xfffff8000329c800 [vtnet0 txq 1] 100048 D - 0xfffff8000329c700 [mca taskq] 100049 D - 0xffffffff824faf61 [deadlkres] 100051 D - 0xfffff8000329c600 [acpi_task_0] 100052 D - 0xfffff8000329c600 [acpi_task_1] 100053 D - 0xfffff8000329c600 [acpi_task_2] 100055 D - 0xfffff8000329ce00 [CAM taskq] db> show all locks Process 777 (sh) thread 0xfffff8003654c6e0 (100102) shared lockmgr ufs (ufs) r = 0 (0xfffff80003a30d88) locked @ /syzkaller/managers/i386/kernel/sys/kern/vfs_lookup.c:713 Process 776 (syz-executor.0) thread 0xfffff8003680b000 (100116) exclusive rw udpinp (udpinp) r = 0 (0xfffff80003cfb020) locked @ /syzkaller/managers/i386/kernel/sys/netinet/udp_usrreq.c:1125 db> show malloc Type InUse MemUse Requests devbuf 4200 4764K 4224 vtbuf 24 1968K 46 callout 3 1672K 3 kobj 332 1328K 488 newblk 365 1115K 407 vfscache 4 1025K 4 inodedep 54 539K 77 pcb 21 537K 77 ufs_quota 1 512K 1 vfs_hash 1 512K 1 intr 4 388K 4 subproc 111 220K 842 acpica 1674 185K 47809 vnet_data 1 168K 1 pagedep 17 132K 21 tfo_ccache 1 128K 1 sysctloid 2038 107K 2098 sem 4 106K 4 DEVFS1 102 102K 113 bus 948 77K 2905 linker 205 76K 222 mtx_pool 2 72K 2 syncache 1 68K 1 UMAHash 3 67K 4 acpitask 1 64K 1 ddb_capture 1 64K 1 module 493 62K 494 filedesc 5 37K 17 gtaskqueue 22 34K 22 hostcache 1 32K 1 shm 1 32K 1 DEVFS3 121 31K 131 msg 4 30K 4 umtx 240 30K 240 kdtrace 150 29K 1612 DEVFS_RULE 56 27K 56 kbdmux 6 22K 6 BPF 11 18K 11 temp 22 17K 1588 ufs_mount 3 17K 4 proc 3 17K 3 tty 16 16K 16 tidhash 1 16K 1 ifaddr 42 16K 42 ithread 87 15K 87 bus-sc 26 13K 1128 KTRACE 100 13K 100 kenv 95 12K 99 vmem 3 11K 4 eventhandler 122 11K 122 pfs_nodes 20 10K 20 GEOM 60 10K 487 rman 77 9K 418 bmsafemap 3 9K 45 devstat 4 9K 4 UART 12 9K 12 rpc 2 8K 2 shmfd 1 8K 1 pfs_vncache 1 8K 1 audit_evclass 230 8K 288 lltable 20 7K 20 cred 27 7K 233 ifnet 4 7K 4 CAM DEV 3 6K 508 ether_multi 73 6K 78 vt 11 6K 11 kqueue 49 6K 782 sglist 5 6K 5 CAM queue 5 6K 1522 in6_multi 41 5K 41 ufs_dirhash 24 5K 24 routetbl 36 5K 40 plimit 18 5K 329 taskqueue 42 5K 42 memdesc 1 4K 1 MCA 32 4K 32 evdev 4 4K 4 diradd 31 4K 42 hhook 13 4K 13 terminal 11 3K 11 session 21 3K 32 pgrp 21 3K 32 acpisem 20 3K 20 uidinfo 4 3K 4 select 18 3K 18 proc-args 41 3K 484 dirrem 17 3K 28 local_apic 1 2K 1 io_apic 1 2K 1 ipsec-saq 2 2K 2 CAM XPT 22 2K 542 lockf 15 2K 22 Unitno 25 2K 39 ip6ndp 8 2K 9 acpidev 20 2K 20 mkdir 10 2K 22 crypto 2 2K 2 msi 9 2K 9 indirdep 4 1K 4 ipsecpolicy 1 1K 1 sahead 1 1K 1 secasvar 1 1K 1 sctp_ifa 8 1K 8 clone 8 1K 8 cdev 4 1K 4 NFSD session 1 1K 1 CAM periph 4 1K 270 in_multi 3 1K 4 toponodes 6 1K 6 isadev 6 1K 6 mount 16 1K 86 pci_link 10 1K 10 CAM SIM 2 1K 2 softdep 1 1K 1 chacha20random 1 1K 1 epoch 4 1K 4 newdirblk 7 1K 11 encap_export_host 8 1K 8 mld 3 1K 3 sctp_ifn 3 1K 3 igmp 3 1K 3 pfil 3 1K 3 tun 4 1K 4 osd 3 1K 9 vnodes 1 1K 1 NFSD lckfile 1 1K 1 NFSD V4client 1 1K 1 DEVFS 9 1K 10 inpcbpolicy 7 1K 144 feeder 7 1K 7 loginclass 3 1K 3 DEVFSP 3 1K 3 soname 5 1K 5511 apmdev 1 1K 1 atkbddev 2 1K 2 pmchooks 1 1K 1 prison 4 1K 4 CAM dev queue 2 1K 2 CAM I/O Scheduler 1 1K 1 CAM path 4 1K 1030 filecaps 4 1K 63 nexusdev 5 1K 5 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 entropy 1 1K 36 p1003.1b 1 1K 1 ppbusdev 0 0K 0 agtiapi_MemAlloc malloc 0 0K 0 osti_cacheable 0 0K 0 madt_table 0 0K 2 tempbuff 0 0K 0 tempbuff 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 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 5 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 6 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 6 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 vnodemarker 0 0K 4 mpr 0 0K 0 statfs 0 0K 195 export_host 0 0K 0 cl_savebuf 0 0K 2 biobuf 0 0K 0 aios 0 0K 0 lio 0 0K 0 acl 0 0K 0 mfibuf 0 0K 0 mbuf_tag 0 0K 46 accf 0 0K 0 pts 0 0K 0 iov 0 0K 12828 ioctlops 0 0K 90 Witness 0 0K 0 stack 0 0K 0 md_sectors 0 0K 0 sbuf 0 0K 364 md_disk 0 0K 0 compressor 0 0K 0 malodev 0 0K 0 SWAP 0 0K 0 LED 0 0K 0 sysctltmp 0 0K 565 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 CAM CCB 0 0K 1763 PUC 0 0K 0 db> show ktr No such command; use "help" to list available commands