panic: sx lock still held cpuid = 0 time = 1576058094 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00243c0870 vpanic() at vpanic+0x1c7/frame 0xfffffe00243c08e0 panic() at panic+0x43/frame 0xfffffe00243c0940 sx_destroy() at sx_destroy+0x63/frame 0xfffffe00243c0960 solisten_proto() at solisten_proto+0xd2/frame 0xfffffe00243c09c0 tcp6_usr_listen() at tcp6_usr_listen+0x1dc/frame 0xfffffe00243c0a30 solisten() at solisten+0x7a/frame 0xfffffe00243c0a70 kern_listen() at kern_listen+0x125/frame 0xfffffe00243c0ab0 ia32_syscall() at ia32_syscall+0x48c/frame 0xfffffe00243c0bf0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x8142e7d KDB: enter: panic [ thread pid 4209 tid 100875 ] Stopped at kdb_enter+0x67: movq $0,0x1467be6(%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 0xfffffe0024800000 rdx 0x3ffff rbx 0 rsp 0xfffffe00243c0850 rbp 0xfffffe00243c0870 rsi 0x40001 rdi 0xffffffff810b6e31 vprintf+0xe1 r8 0 r9 0xffffffff r10 0 r11 0xfffff80012bb14f0 r12 0xffffffff82068d70 ddb_dbbe r13 0 r14 0xffffffff81929c3a r15 0xffffffff81929c3a rip 0xffffffff810ac0b7 kdb_enter+0x67 rflags 0x200082 kernphys+0x82 kdb_enter+0x67: movq $0,0x1467be6(%rip) db> show proc Process 4209 (syz-executor.0) at 0xfffff80012390a60: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 771 at 0xfffff80003d1f000 ABI: FreeBSD ELF32 arguments: /root/syz-executor.0 reaper: 0xfffff800032ca530 reapsubtree: 1 sigparent: 20 vmspace: 0xfffff80003cf9000 (map 0xfffff80003cf9000) (map.pmap 0xfffff80003cf90c0) (pmap 0xfffff80003cf9120) threads: 4 100093 RunQ syz-executor.0 100875 Run CPU 0 syz-executor.0 100881 Run CPU 1 syz-executor.0 100889 S uwait 0xfffff8004f838200 syz-executor.0 db> ps pid ppid pgrp uid state wmesg wchan cmd 4209 771 771 0 R (threaded) syz-executor.0 100093 RunQ syz-executor.0 100875 Run CPU 0 syz-executor.0 100881 Run CPU 1 syz-executor.0 100889 S uwait 0xfffff8004f838200 syz-executor.0 3466 1 3466 65 Ss select 0xfffff8001225de40 dhclient 2795 1 2795 0 Ss select 0xfffff80003c9c6c0 dhclient 2792 1 2792 0 Ss select 0xfffff80003c9d740 dhclient 2773 1 2773 65 Ss select 0xfffff80003c9c4c0 dhclient 2170 1 2170 0 Ss select 0xfffff80003c9c940 dhclient 2167 1 2167 0 Ss select 0xfffff80003c9db40 dhclient 2148 1 2148 65 Ss select 0xfffff8001225d1c0 dhclient 1542 1 1542 0 Ss select 0xfffff80003c9ca40 dhclient 1539 1 1539 0 Ss select 0xfffff8001225d340 dhclient 1516 1 1516 65 Ss select 0xfffff80003c9dd40 dhclient 1009 1 1009 0 Ss select 0xfffff80003c9d840 dhclient 1006 1 1006 0 Ss select 0xfffff80003c9d8c0 dhclient 845 766 845 0 Ss piperd 0xfffff80003cfa000 syz-executor.3 843 766 843 0 Ss piperd 0xfffff8002a3138e8 syz-executor.2 772 766 772 0 Ss piperd 0xfffff80003d0a000 syz-executor.1 771 766 771 0 Ss nanslp 0xffffffff824fc8a1 syz-executor.0 766 764 764 0 S (threaded) syz-fuzzer 100099 S uwait 0xfffff800039c1000 syz-fuzzer 100100 S uwait 0xfffff80003d21d00 syz-fuzzer 100101 S kqread 0xfffff80003304800 syz-fuzzer 100102 S uwait 0xfffff80003d21f00 syz-fuzzer 100103 S uwait 0xfffff80003d18080 syz-fuzzer 100104 S uwait 0xfffff80003d21700 syz-fuzzer 100105 S uwait 0xfffff80003d21800 syz-fuzzer 100106 S uwait 0xfffff800039c1180 syz-fuzzer 100108 S uwait 0xfffff800039be880 syz-fuzzer 100110 S uwait 0xfffff80003d21a00 syz-fuzzer 100111 S uwait 0xfffff80003d21b00 syz-fuzzer 764 762 764 0 Ss pause 0xfffff800035070a8 csh 762 680 762 0 Ss select 0xfffff8001225d2c0 sshd 746 1 746 0 Ss+ ttyin 0xfffff800033c4cb0 getty 745 1 745 0 Ss+ ttyin 0xfffff80003abc8b0 getty 744 1 744 0 Ss+ ttyin 0xfffff80003abccb0 getty 743 1 743 0 Ss+ ttyin 0xfffff80003abf0b0 getty 742 1 742 0 Ss+ ttyin 0xfffff80003abf4b0 getty 741 1 741 0 Ss+ ttyin 0xfffff80003abf8b0 getty 740 1 740 0 Ss+ ttyin 0xfffff80003abfcb0 getty 739 1 739 0 Ss+ ttyin 0xfffff80003abe0b0 getty 738 1 738 0 Ss+ ttyin 0xfffff80003abe4b0 getty 684 1 684 0 Ss nanslp 0xffffffff824fc8a1 cron 680 1 680 0 Ss select 0xfffff8001225dac0 sshd 493 1 493 0 Ss select 0xfffff8001225dbc0 syslogd 422 1 422 0 Ss select 0xfffff80003c9cc40 devd 421 1 421 65 Ss select 0xfffff8001225db40 dhclient 336 1 336 0 Ss select 0xfffff80003c9cbc0 dhclient 333 1 333 0 Ss select 0xfffff8001225d3c0 dhclient 21 0 0 0 DL syncer 0xffffffff825d2d60 [syncer] 20 0 0 0 DL vlruwt 0xfffff80003a6a000 [vnlru] 19 0 0 0 DL (threaded) [bufdaemon] 100063 D qsleep 0xffffffff825d2218 [bufdaemon] 100068 D - 0xffffffff8200a980 [bufspacedaemon-0] 100079 D sdflush 0xfffff800034146e8 [/ worker] 18 0 0 0 DL psleep 0xffffffff825edc08 [vmdaemon] 17 0 0 0 DL (threaded) [pagedaemon] 100061 D psleep 0xffffffff8261a7d8 [dom0] 100066 D launds 0xffffffff8261a7e4 [laundry: dom0] 100067 D umarcl 0xffffffff81534300 [uma] 16 0 0 0 DL - 0xffffffff82358518 [rand_harvestq] 15 0 0 0 DL waiting 0xffffffff8265fda0 [sctp_iterator] 9 0 0 0 DL - 0xffffffff825d1c1c [soaiod4] 8 0 0 0 DL - 0xffffffff825d1c1c [soaiod3] 7 0 0 0 DL - 0xffffffff825d1c1c [soaiod2] 6 0 0 0 DL - 0xffffffff825d1c1c [soaiod1] 5 0 0 0 DL (threaded) [cam] 100031 D - 0xffffffff822338c0 [doneq0] 100060 D - 0xffffffff82233788 [scanner] 4 0 0 0 DL crypto_ 0xfffff800031e4e90 [crypto returns 1] 3 0 0 0 DL crypto_ 0xfffff800031e4e30 [crypto returns 0] 2 0 0 0 DL crypto_ 0xffffffff825e7ce8 [crypto] 14 0 0 0 DL seqstat 0xfffff80003330888 [sequencer 00] 13 0 0 0 DL (threaded) [geom] 100022 D - 0xffffffff82618e08 [g_event] 100023 D - 0xffffffff82618e18 [g_up] 100024 D - 0xffffffff82618e10 [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 [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 0xfffff800032ca530 [init] 10 0 0 0 DL audit_w 0xffffffff82660a30 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D swapin 0xffffffff82607778 [swapper] 100005 D - 0xfffff80003306000 [thread taskq] 100007 D - 0xfffff800031d8d00 [config_0] 100008 D - 0xfffff80003305d00 [kqueue_ctx taskq] 100009 D - 0xfffff80003305c00 [aiod_kick taskq] 100012 D - 0xfffff800031d8c00 [if_config_tqg_0] 100013 D - 0xfffff800031d8b00 [softirq_0] 100014 D - 0xfffff800031d8a00 [softirq_1] 100015 D - 0xfffff800031d8900 [if_io_tqg_0] 100016 D - 0xfffff800031d8800 [if_io_tqg_1] 100021 D - 0xfffff80003305900 [firmware taskq] 100026 D - 0xfffff80003305800 [crypto_0] 100027 D - 0xfffff80003305800 [crypto_1] 100041 D - 0xfffff80003305600 [vtnet0 rxq 0] 100042 D - 0xfffff80003305500 [vtnet0 txq 0] 100043 D - 0xfffff80003305400 [vtnet0 rxq 1] 100044 D - 0xfffff80003305300 [vtnet0 txq 1] 100048 D - 0xfffff80003305200 [mca taskq] 100051 D - 0xffffffff824fb621 [deadlkres] 100056 D - 0xfffff80003ab7100 [acpi_task_0] 100057 D - 0xfffff80003ab7100 [acpi_task_1] 100058 D - 0xfffff80003ab7100 [acpi_task_2] 100059 D - 0xfffff80003305700 [CAM taskq] db> show all locks Process 4209 (syz-executor.0) thread 0xfffff80012bb1000 (100875) exclusive sleep mutex socket (socket) r = 0 (0xfffff80003e65388) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:489 exclusive rw tcpinp (tcpinp) r = 0 (0xfffff8001243f3f0) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:481 Process 4209 (syz-executor.0) thread 0xfffff8004f8566e0 (100881) exclusive sx so_snd_sx (so_snd_sx) r = 0 (0xfffff80003e65600) locked @ /syzkaller/managers/i386/kernel/sys/kern/uipc_sockbuf.c:393 db> show malloc Type InUse MemUse Requests devbuf 4206 4793K 4234 vtbuf 24 1968K 46 callout 3 1672K 3 kobj 333 1332K 489 sysctloid 22924 1325K 22986 newblk 11 1027K 3898 vfscache 4 1025K 4 inodedep 73 548K 3340 pcb 28 537K 2935 ufs_quota 1 512K 1 vfs_hash 1 512K 1 intr 4 388K 4 subproc 140 273K 4299 acpica 1674 185K 49400 vnet_data 1 168K 1 pagedep 9 130K 3268 tfo_ccache 1 128K 1 sem 4 106K 4 DEVFS1 105 105K 122 filedesc 15 101K 6523 linker 221 89K 252 BPF 46 88K 46 bus 959 77K 3155 mtx_pool 2 72K 2 syncache 1 68K 1 acpitask 1 64K 1 ddb_capture 1 64K 1 module 495 62K 495 umtx 320 40K 320 gtaskqueue 22 34K 22 kdtrace 177 34K 13384 hostcache 1 32K 1 shm 1 32K 1 DEVFS3 124 31K 134 msg 4 30K 4 DEVFS_RULE 56 27K 56 ifaddr 75 26K 75 kbdmux 6 22K 6 vmem 3 19K 4 temp 34 17K 2276 ufs_mount 3 17K 4 proc 3 17K 3 tty 16 16K 16 tidhash 1 16K 1 lltable 43 16K 136 ithread 87 15K 87 ether_multi 167 14K 172 KTRACE 100 13K 100 ifnet 7 13K 7 kenv 95 12K 99 eventhandler 122 11K 122 pfs_nodes 20 10K 20 in6_multi 83 10K 83 GEOM 60 10K 487 rman 80 10K 421 select 67 9K 67 bmsafemap 2 9K 3315 devstat 4 9K 4 UART 12 9K 12 rpc 2 8K 2 shmfd 1 8K 1 pfs_vncache 1 8K 1 dirrem 62 8K 3260 freefile 62 8K 3258 cred 31 8K 232 audit_evclass 231 8K 289 routetbl 57 7K 61 CAM DEV 3 6K 508 plimit 24 6K 409 kqueue 60 6K 4223 vt 11 6K 11 sglist 5 6K 5 CAM queue 5 6K 1522 DEVFSP 78 5K 82 ufs_dirhash 24 5K 24 taskqueue 42 5K 42 session 35 5K 49 pgrp 35 5K 49 memdesc 1 4K 1 MCA 32 4K 32 evdev 4 4K 4 kcovinfo 64 4K 68 UMA 233 4K 233 lockf 32 4K 54 hhook 13 4K 13 proc-args 52 3K 656 terminal 11 3K 11 acpisem 21 3K 21 uidinfo 4 3K 5 local_apic 1 2K 1 io_apic 1 2K 1 ipsec-saq 2 2K 2 sctp_ifa 16 2K 16 ip6ndp 12 2K 19 Unitno 30 2K 7777 CAM XPT 22 2K 541 in_multi 6 2K 7 acpidev 20 2K 20 crypto 2 2K 2 msi 9 2K 9 tun 7 2K 7 freework 5 2K 3288 mkdir 8 1K 6500 freeblks 4 1K 3263 ipsecpolicy 1 1K 1 sahead 1 1K 1 secasvar 1 1K 1 clone 8 1K 8 NFSD session 1 1K 1 CAM periph 4 1K 270 mld 6 1K 6 sctp_ifn 6 1K 6 igmp 6 1K 6 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 diradd 4 1K 3299 sctp_timw 2 1K 2 chacha20random 1 1K 1 epoch 4 1K 4 cdev 2 1K 2 encap_export_host 8 1K 8 inpcbpolicy 13 1K 3064 pfil 3 1K 3 osd 3 1K 9 newdirblk 4 1K 3250 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 soname 5 1K 8719 CAM path 4 1K 1030 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 nexusdev 5 1K 5 filecaps 5 1K 112 entropy 2 1K 41 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 2351 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 1923 sentinel 0 0K 0 jfsync 0 0K 0 jtrunc 0 0K 0 sbdep 0 0K 14 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 6 allocindir 0 0K 0 indirdep 0 0K 52 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 6 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 8 sctp_iter 0 0K 10 sctp_mvrf 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 142 sctp_atky 0 0K 148 sctp_atcl 0 0K 142 sctp_a_it 0 0K 10 sctp_aadr 0 0K 1 sctp_stro 0 0K 2 sctp_stri 0 0K 0 sctp_map 0 0K 4 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 36 mpr 0 0K 0 statfs 0 0K 3434 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 211 accf 0 0K 0 pts 0 0K 0 iov 0 0K 15982 ioctlops 0 0K 119 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 675 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 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