login: panic: sx lock still held cpuid = 1 time = 1580549310 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0024505870 vpanic() at vpanic+0x1ce/frame 0xfffffe00245058e0 panic() at panic+0x43/frame 0xfffffe0024505940 sx_destroy() at sx_destroy+0x63/frame 0xfffffe0024505960 solisten_proto() at solisten_proto+0xde/frame 0xfffffe00245059c0 tcp6_usr_listen() at tcp6_usr_listen+0x1dc/frame 0xfffffe0024505a30 solisten() at solisten+0x7a/frame 0xfffffe0024505a70 kern_listen() at kern_listen+0x125/frame 0xfffffe0024505ab0 ia32_syscall() at ia32_syscall+0x48c/frame 0xfffffe0024505bf0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x8142e7d KDB: enter: panic [ thread pid 810 tid 100155 ] Stopped at kdb_enter+0x67: movq $0,0x1466be6(%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 0xffffffff818f0b69 rbx 0 rsp 0xfffffe0024505850 rbp 0xfffffe0024505870 rsi 0x1 rdi 0 r8 0 r9 0xffffffff r10 0 r11 0xfffff80038ac04f0 r12 0xffffffff82068d90 ddb_dbbe r13 0 r14 0xffffffff81938d03 r15 0xffffffff81938d03 rip 0xffffffff810af4b7 kdb_enter+0x67 rflags 0x200082 kernphys+0x82 kdb_enter+0x67: movq $0,0x1466be6(%rip) db> show proc Process 810 (syz-executor.0) at 0xfffff80003db9530: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 773 at 0xfffff80038626a60 ABI: FreeBSD ELF32 arguments: /root/syz-executor.0 reaper: 0xfffff800032fb530 reapsubtree: 1 sigparent: 20 vmspace: 0xfffff800387e5000 (map 0xfffff800387e5000) (map.pmap 0xfffff800387e50c0) (pmap 0xfffff800387e5120) threads: 5 100077 RunQ syz-executor.0 100155 Run CPU 1 syz-executor.0 100156 S msgrcv 0xfffffe0004cf7780 syz-executor.0 100157 Run CPU 0 syz-executor.0 100158 S msgrcv 0xfffffe0004cf7780 syz-executor.0 db> ps pid ppid pgrp uid state wmesg wchan cmd 810 773 773 60929 R (threaded) syz-executor.0 100077 RunQ syz-executor.0 100155 Run CPU 1 syz-executor.0 100156 S msgrcv 0xfffffe0004cf7780 syz-executor.0 100157 Run CPU 0 syz-executor.0 100158 S msgrcv 0xfffffe0004cf7780 syz-executor.0 802 796 802 0 Ss select 0xfffff8003825d440 dhclient 799 1 799 0 Ss select 0xfffff8003825d3c0 dhclient 796 789 422 65 S select 0xfffff8003825d540 dhclient 789 422 422 0 S wait 0xfffff8000354c000 sh 773 771 773 0 Ss nanslp 0xffffffff824feca0 syz-executor.0 771 769 769 0 S (threaded) syz-execprog 100105 S uwait 0xfffff80003a6b500 syz-execprog 100109 S uwait 0xfffff80003e28880 syz-execprog 100110 S uwait 0xfffff80003a6b000 syz-execprog 100111 S uwait 0xfffff80003a6c280 syz-execprog 100112 S uwait 0xfffff80003a6c380 syz-execprog 100113 S uwait 0xfffff80003a6c480 syz-execprog 100115 S uwait 0xfffff80003a6c680 syz-execprog 100116 S uwait 0xfffff80003301d00 syz-execprog 100117 S kqread 0xfffff80003340900 syz-execprog 769 767 769 0 Ss pause 0xfffff800386260a8 csh 767 680 767 0 Ss select 0xfffff80003cef8c0 sshd 746 1 746 0 Ss+ ttyin 0xfffff800033facb0 getty 745 1 745 0 Ss+ ttyin 0xfffff800033f9cb0 getty 744 1 744 0 Ss+ ttyin 0xfffff80003ad40b0 getty 743 1 743 0 Ss+ ttyin 0xfffff80003ad44b0 getty 742 1 742 0 Ss+ ttyin 0xfffff80003ad48b0 getty 741 1 741 0 Ss+ ttyin 0xfffff80003ad4cb0 getty 740 1 740 0 Ss+ ttyin 0xfffff80003ad30b0 getty 739 1 739 0 Ss+ ttyin 0xfffff80003ad34b0 getty 738 1 738 0 Ss+ ttyin 0xfffff80003ad38b0 getty 736 1 22 0 S+ piperd 0xfffff80003da58e8 logger 735 734 22 0 S+ nanslp 0xffffffff824feca0 sleep 734 1 22 0 S+ wait 0xfffff80003549000 sh 684 1 684 0 Ss nanslp 0xffffffff824feca0 cron 680 1 680 0 Ss select 0xfffff80003cef940 sshd 493 1 493 0 Ss select 0xfffff80003cefb40 syslogd 422 1 422 0 Ss wait 0xfffff80003b11530 devd 421 1 421 65 Ss select 0xfffff80003cef9c0 dhclient 336 1 336 0 Ss select 0xfffff8003825ddc0 dhclient 333 1 333 0 Ss select 0xfffff80003cefac0 dhclient 21 0 0 0 DL vlruwt 0xfffff80003b11a60 [vnlru] 20 0 0 0 DL syncer 0xffffffff825d5158 [syncer] 19 0 0 0 DL (threaded) [bufdaemon] 100065 D qsleep 0xffffffff825d4658 [bufdaemon] 100070 D - 0xffffffff8200a980 [bufspacedaemon-0] 100079 D sdflush 0xfffff80003d15ce8 [/ worker] 18 0 0 0 DL psleep 0xffffffff825f00c8 [vmdaemon] 17 0 0 0 DL (threaded) [pagedaemon] 100063 D psleep 0xffffffff8261cfd8 [dom0] 100068 D launds 0xffffffff8261cfe4 [laundry: dom0] 100069 D umarcl 0xffffffff8153efa0 [uma] 16 0 0 0 DL - 0xffffffff82359530 [rand_harvestq] 15 0 0 0 DL waiting 0xffffffff826625a0 [sctp_iterator] 9 0 0 0 DL - 0xffffffff825d405c [soaiod4] 8 0 0 0 DL - 0xffffffff825d405c [soaiod3] 7 0 0 0 DL - 0xffffffff825d405c [soaiod2] 6 0 0 0 DL - 0xffffffff825d405c [soaiod1] 5 0 0 0 DL (threaded) [cam] 100031 D - 0xffffffff82234940 [doneq0] 100062 D - 0xffffffff82234808 [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_ 0xffffffff825ea138 [crypto] 14 0 0 0 DL seqstat 0xfffff8000336a888 [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] 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 0xfffff800032fb530 [init] 10 0 0 0 DL audit_w 0xffffffff82663230 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D swapin 0xffffffff82609c48 [swapper] 100005 D - 0xfffff80003342000 [thread taskq] 100007 D - 0xfffff80003341d00 [kqueue_ctx taskq] 100008 D - 0xfffff80003341c00 [config_0] 100009 D - 0xfffff80003341b00 [aiod_kick taskq] 100012 D - 0xfffff80003341800 [if_config_tqg_0] 100013 D - 0xfffff80003341700 [if_io_tqg_0] 100014 D - 0xfffff80003341600 [if_io_tqg_1] 100015 D - 0xfffff80003341500 [softirq_0] 100016 D - 0xfffff80003341400 [softirq_1] 100021 D - 0xfffff80003341300 [firmware taskq] 100026 D - 0xfffff80003341200 [crypto_0] 100027 D - 0xfffff80003341200 [crypto_1] 100041 D - 0xfffff80003341000 [vtnet0 rxq 0] 100042 D - 0xfffff80003340e00 [vtnet0 txq 0] 100043 D - 0xfffff80003340d00 [vtnet0 rxq 1] 100044 D - 0xfffff80003340c00 [vtnet0 txq 1] 100046 D vtbslp 0xfffff800034da400 [virtio_balloon] 100050 D - 0xfffff80003340b00 [mca taskq] 100055 D - 0xffffffff81cdcd51 [deadlkres] 100057 D - 0xfffff80003b4d100 [acpi_task_0] 100058 D - 0xfffff80003b4d100 [acpi_task_1] 100059 D - 0xfffff80003b4d100 [acpi_task_2] 100061 D - 0xfffff80003341100 [CAM taskq] db> show all locks Process 810 (syz-executor.0) thread 0xfffff80038ac0000 (100155) exclusive sleep mutex socket (socket) r = 0 (0xfffff80003e91000) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:483 exclusive rw tcpinp (tcpinp) r = 0 (0xfffff800384ced78) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:475 db> show malloc Type InUse MemUse Requests devbuf 4213 4851K 4238 vtbuf 24 1968K 46 sysctloid 26737 1565K 26801 kobj 332 1328K 488 newblk 370 1117K 419 vfscache 4 1025K 4 inodedep 63 543K 87 pcb 24 537K 96 ufs_quota 1 512K 1 vfs_hash 1 512K 1 callout 2 512K 2 intr 4 388K 4 subproc 123 237K 884 acpica 1674 185K 49750 vnet_data 1 168K 1 pagedep 17 132K 30 tfo_ccache 1 128K 1 sem 4 106K 4 DEVFS1 102 102K 113 linker 222 89K 244 bus 964 78K 3308 mtx_pool 2 72K 2 syncache 1 68K 1 acpitask 1 64K 1 ddb_capture 1 64K 1 module 494 62K 494 filedesc 5 37K 33 BPF 19 36K 19 umtx 272 34K 272 gtaskqueue 22 34K 22 hostcache 1 32K 1 shm 1 32K 1 kdtrace 162 32K 1717 DEVFS3 121 31K 131 msg 4 30K 4 DEVFS_RULE 56 27K 56 kbdmux 6 22K 6 vmem 3 19K 4 temp 22 17K 1665 ufs_mount 3 17K 4 proc 3 17K 3 tty 16 16K 16 tidhash 1 16K 1 ifaddr 41 16K 43 ithread 89 15K 89 bus-sc 30 14K 1394 KTRACE 100 13K 100 cred 46 12K 258 kenv 95 12K 99 eventhandler 123 11K 123 pfs_nodes 20 10K 20 GEOM 60 10K 487 rman 82 10K 423 bmsafemap 4 9K 56 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 lltable 20 7K 20 ifnet 4 7K 4 CAM DEV 3 6K 510 ether_multi 73 6K 78 routetbl 37 6K 41 vt 11 6K 11 kqueue 52 6K 815 sglist 5 6K 5 CAM queue 5 6K 1528 in6_multi 41 5K 41 plimit 19 5K 344 ufs_dirhash 24 5K 24 taskqueue 42 5K 42 memdesc 1 4K 1 MCA 32 4K 32 diradd 32 4K 52 evdev 4 4K 4 UMA 236 4K 236 select 28 4K 28 hhook 13 4K 13 dirrem 25 4K 36 session 23 3K 34 pgrp 23 3K 34 acpisem 22 3K 22 terminal 11 3K 11 uidinfo 5 3K 5 proc-args 44 3K 509 local_apic 1 2K 1 io_apic 1 2K 1 ipsec-saq 2 2K 2 lockf 19 2K 29 CAM XPT 22 2K 543 Unitno 25 2K 39 acpidev 20 2K 20 crypto 2 2K 2 msi 9 2K 9 mkdir 9 2K 38 freefile 8 1K 17 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 vnodemarker 2 1K 6 NFSD session 1 1K 1 ip6ndp 6 1K 9 CAM periph 4 1K 271 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 pfil 4 1K 4 chacha20random 1 1K 1 epoch 4 1K 4 cdev 2 1K 2 newdirblk 7 1K 19 encap_export_host 8 1K 8 mld 3 1K 3 sctp_ifn 3 1K 3 igmp 3 1K 3 inpcbpolicy 11 1K 183 tun 4 1K 4 osd 3 1K 9 DEVFSP 5 1K 5 freework 2 1K 34 freeblks 1 1K 33 vnodes 1 1K 1 NFSD lckfile 1 1K 1 NFSD V4client 1 1K 1 DEVFS 9 1K 10 feeder 7 1K 7 loginclass 3 1K 3 CAM path 4 1K 1034 apmdev 1 1K 1 atkbddev 2 1K 2 pmchooks 1 1K 1 prison 4 1K 4 filecaps 5 1K 72 CAM dev queue 2 1K 2 CAM I/O Scheduler 1 1K 1 soname 4 1K 5766 nexusdev 5 1K 5 entropy 2 1K 38 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 vnet_data_free 1 1K 1 Per-cpu 1 1K 1 p1003.1b 1 1K 1 CAM CCB 0 0K 1768 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 13 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 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 5 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 5 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 203 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 48 accf 0 0K 0 pts 0 0K 0 iov 0 0K 13375 ioctlops 0 0K 92 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 590 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 db>