panic: Assertion in_epoch(net_epoch_preempt) failed at /syzkaller/managers/i386/kernel/sys/netinet6/ip6_output.c:448 cpuid = 1 time = 1583702818 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0024a9ef80 vpanic() at vpanic+0x1ce/frame 0xfffffe0024a9eff0 panic() at panic+0x43/frame 0xfffffe0024a9f050 ip6_output() at ip6_output+0x379e/frame 0xfffffe0024a9f320 sctp_lowlevel_chunk_output() at sctp_lowlevel_chunk_output+0x18ea/frame 0xfffffe0024a9f470 sctp_send_initiate() at sctp_send_initiate+0xa53/frame 0xfffffe0024a9f570 sctp_lower_sosend() at sctp_lower_sosend+0x3f73/frame 0xfffffe0024a9f780 sctp_sosend() at sctp_sosend+0x4fe/frame 0xfffffe0024a9f8b0 sosend() at sosend+0xc6/frame 0xfffffe0024a9f920 kern_sendit() at kern_sendit+0x33d/frame 0xfffffe0024a9f9d0 freebsd32_sendmsg() at freebsd32_sendmsg+0x256/frame 0xfffffe0024a9fab0 ia32_syscall() at ia32_syscall+0x2e4/frame 0xfffffe0024a9fbf0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0x8142fdc KDB: enter: panic [ thread pid 784 tid 100115 ] Stopped at kdb_enter+0x67: movq $0,0x14636f6(%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 0xfffffe0025200000 rdx 0x3ffff rbx 0 rsp 0xfffffe0024a9ef60 rbp 0xfffffe0024a9ef80 rsi 0x40001 rdi 0xffffffff810beb36 vprintf+0x176 r8 0 r9 0xffffffff r10 0xf264 ll+0xf243 r11 0xfffffe002493c610 r12 0xffffffff82068f60 ddb_dbbe r13 0 r14 0xffffffff8193f6cf r15 0xffffffff8193f6cf rip 0xffffffff810b3bc7 kdb_enter+0x67 rflags 0x200086 kernphys+0x86 kdb_enter+0x67: movq $0,0x14636f6(%rip) db> show proc Process 784 (syz-executor.0) at 0xfffff80003cde530: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 768 at 0xfffff80003c69000 ABI: FreeBSD ELF32 arguments: /root/syz-executor.0 reaper: 0xfffff80003317000 reapsubtree: 1 sigparent: 20 vmspace: 0xfffffe0024935000 (map 0xfffffe0024935000) (map.pmap 0xfffffe00249350c0) (pmap 0xfffffe0024935120) threads: 2 100084 RunQ syz-executor.0 100115 Run CPU 1 syz-executor.0 db> ps pid ppid pgrp uid state wmesg wchan cmd 784 768 768 0 R (threaded) syz-executor.0 100084 RunQ syz-executor.0 100115 Run CPU 1 syz-executor.0 783 775 775 0 R ifconfig 782 766 764 0 R CPU 0 syz-executor.3 781 772 422 0 R ifconfig 775 766 775 0 Ss wait 0xfffff80003cdea60 syz-executor.2 772 422 422 0 S piperd 0xfffff80003c5c5f0 sh 769 766 764 0 R syz-executor.1 768 766 768 0 Rs syz-executor.0 766 764 764 0 S (threaded) syz-fuzzer 100085 S uwait 0xfffff80003bcb980 syz-fuzzer 100105 S uwait 0xfffff80003396080 syz-fuzzer 100106 S uwait 0xfffff80003396180 syz-fuzzer 100107 S uwait 0xfffff8000b0ca980 syz-fuzzer 100108 S uwait 0xfffff8000b0cab00 syz-fuzzer 100109 S uwait 0xfffff80003bc3f00 syz-fuzzer 100110 S kqread 0xfffff800031fe300 syz-fuzzer 100111 S uwait 0xfffff80003bc9080 syz-fuzzer 100112 S uwait 0xfffff80003bc9200 syz-fuzzer 100113 S uwait 0xfffff8000b4b8b00 syz-fuzzer 100114 S uwait 0xfffff80003bc9300 syz-fuzzer 764 762 764 0 Ss pause 0xfffff80003c660a8 csh 762 680 762 0 Ss select 0xfffff80003bc8340 sshd 746 1 746 0 Ss+ ttyin 0xfffff800033ed8b0 getty 745 1 745 0 Ss+ ttyin 0xfffff80003b160b0 getty 744 1 744 0 Ss+ ttyin 0xfffff80003b164b0 getty 743 1 743 0 Ss+ ttyin 0xfffff80003b168b0 getty 742 1 742 0 Ss+ ttyin 0xfffff80003b16cb0 getty 741 1 741 0 Ss+ ttyin 0xfffff80003b150b0 getty 740 1 740 0 Ss+ ttyin 0xfffff80003b154b0 getty 739 1 739 0 Ss+ ttyin 0xfffff80003b158b0 getty 738 1 738 0 Ss+ ttyin 0xfffff80003b15cb0 getty 736 1 22 0 S+ piperd 0xfffff80003c5c000 logger 735 734 22 0 S+ nanslp 0xffffffff824ffec1 sleep 734 1 22 0 S+ wait 0xfffff80003d82530 sh 684 1 684 0 Ss nanslp 0xffffffff824ffec0 cron 680 1 680 0 Ss select 0xfffff80003bc9ac0 sshd 493 1 493 0 Ss select 0xfffff80003bc9b40 syslogd 422 1 422 0 Ss wait 0xfffff80003d82a60 devd 421 1 421 65 Ss select 0xfffff8000b0caec0 dhclient 336 1 336 0 Ss select 0xfffff8000b0caf40 dhclient 333 1 333 0 Ss select 0xfffff8000b0cd0c0 dhclient 21 0 0 0 DL vlruwt 0xfffff800033f4a60 [vnlru] 20 0 0 0 DL syncer 0xffffffff825d6358 [syncer] 19 0 0 0 DL (threaded) [bufdaemon] 100065 D qsleep 0xffffffff825d5858 [bufdaemon] 100070 D - 0xffffffff8200aa00 [bufspacedaemon-0] 100082 D sdflush 0xfffff8000353e8e8 [/ worker] 18 0 0 0 DL psleep 0xffffffff825f12c8 [vmdaemon] 17 0 0 0 DL (threaded) [pagedaemon] 100063 D psleep 0xffffffff8261d1d8 [dom0] 100068 D launds 0xffffffff8261d1e4 [laundry: dom0] 100069 D umarcl 0xffffffff81542ff0 [uma] 16 0 0 0 DL - 0xffffffff8235a730 [rand_harvestq] 15 0 0 0 DL waiting 0xffffffff826627a0 [sctp_iterator] 9 0 0 0 DL - 0xffffffff825d525c [soaiod4] 8 0 0 0 DL - 0xffffffff825d525c [soaiod3] 7 0 0 0 DL - 0xffffffff825d525c [soaiod2] 6 0 0 0 DL - 0xffffffff825d525c [soaiod1] 5 0 0 0 DL (threaded) [cam] 100031 D - 0xffffffff82235b40 [doneq0] 100062 D - 0xffffffff82235a08 [scanner] 4 0 0 0 DL crypto_ 0xfffff80003211990 [crypto returns 1] 3 0 0 0 DL crypto_ 0xfffff80003211930 [crypto returns 0] 2 0 0 0 DL crypto_ 0xffffffff825eb338 [crypto] 14 0 0 0 DL seqstat 0xfffff80003364488 [sequencer 00] 13 0 0 0 DL (threaded) [geom] 100022 D - 0xffffffff8261b808 [g_event] 100023 D - 0xffffffff8261b818 [g_up] 100024 D - 0xffffffff8261b810 [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 [swi1: netisr 0] 100018 I [swi3: vm] 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 CanRun [idle: cpu0] 100004 CanRun [idle: cpu1] 1 0 1 0 SLs wait 0xfffff80003317000 [init] 10 0 0 0 DL audit_w 0xffffffff82663430 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D swapin 0xffffffff8260ae48 [swapper] 100006 D - 0xfffff80003200d00 [thread taskq] 100008 D - 0xfffff80003212500 [config_0] 100009 D - 0xfffff80003200b00 [kqueue_ctx taskq] 100010 D - 0xfffff80003200a00 [aiod_kick taskq] 100012 D - 0xfffff80003212300 [if_config_tqg_0] 100013 D - 0xfffff80003212200 [if_io_tqg_0] 100014 D - 0xfffff80003212100 [if_io_tqg_1] 100015 D - 0xfffff80003212000 [softirq_0] 100016 D - 0xfffff80003211e00 [softirq_1] 100021 D - 0xfffff80003200800 [firmware taskq] 100026 D - 0xfffff80003200600 [crypto_0] 100027 D - 0xfffff80003200600 [crypto_1] 100041 D - 0xfffff80003200200 [vtnet0 rxq 0] 100042 D - 0xfffff80003200100 [vtnet0 txq 0] 100043 D - 0xfffff80003200000 [vtnet0 rxq 1] 100044 D - 0xfffff800031ffe00 [vtnet0 txq 1] 100046 D vtbslp 0xfffff8000350e580 [virtio_balloon] 100050 D - 0xfffff800031ffc00 [mca taskq] 100054 D - 0xffffffff81ce3711 [deadlkres] 100058 D - 0xfffff80003b11300 [acpi_task_0] 100059 D - 0xfffff80003b11300 [acpi_task_1] 100060 D - 0xfffff80003b11300 [acpi_task_2] 100061 D - 0xfffff80003200400 [CAM taskq] db> show all locks Process 784 (syz-executor.0) thread 0xfffffe002493c100 (100115) exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe00249f3380) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:13550 Process 781 (ifconfig) thread 0xfffffe0003cc3000 (100078) exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe0003e0acc0) locked @ /syzkaller/managers/i386/kernel/sys/kern/vfs_bio.c:3878 shared lockmgr ufs (ufs) r = 0 (0xfffff80003a07bd8) locked @ /syzkaller/managers/i386/kernel/sys/kern/vfs_vnops.c:801 db> show malloc Type InUse MemUse Requests devbuf 4213 4851K 4238 vtbuf 24 1968K 46 sysctloid 26033 1517K 26097 kobj 332 1328K 488 newblk 523 1155K 578 vfscache 4 1025K 4 pcb 26 541K 77 inodedep 31 527K 87 ufs_quota 1 512K 1 vfs_hash 1 512K 1 callout 2 512K 2 intr 4 388K 4 subproc 110 237K 843 acpica 1674 185K 52709 vnet_data 1 168K 1 pagedep 16 132K 26 tfo_ccache 1 128K 1 sem 4 106K 4 DEVFS1 102 102K 113 filedesc 15 101K 27 linker 222 89K 244 bus 968 78K 3350 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 umtx 252 32K 252 kdtrace 165 32K 1631 DEVFS3 121 31K 131 msg 4 30K 4 DEVFS_RULE 56 27K 56 vmem 3 22K 4 kbdmux 6 22K 6 BPF 11 18K 11 temp 22 17K 1616 ufs_mount 3 17K 4 proc 3 17K 3 tty 16 16K 16 tidhash 1 16K 1 ifaddr 40 15K 42 ithread 89 15K 89 bus-sc 30 14K 1431 KTRACE 100 13K 100 kenv 95 12K 99 eventhandler 122 11K 122 pfs_nodes 20 10K 20 GEOM 60 10K 487 rman 82 10K 423 bmsafemap 2 9K 55 UART 12 9K 12 devstat 4 9K 4 rpc 2 8K 2 shmfd 1 8K 1 pfs_vncache 1 8K 1 audit_evclass 232 8K 290 lltable 20 7K 20 ifnet 4 7K 4 CAM DEV 3 6K 510 ether_multi 73 6K 78 routetbl 36 6K 40 kqueue 54 6K 789 vt 11 6K 11 cred 21 6K 195 sglist 5 6K 5 CAM queue 5 6K 1528 plimit 20 5K 320 in6_multi 41 5K 41 ufs_dirhash 24 5K 24 taskqueue 42 5K 42 memdesc 1 4K 1 MCA 32 4K 32 evdev 4 4K 4 UMA 236 4K 236 diradd 26 4K 55 hhook 13 4K 13 DEVFSP 49 4K 50 kcovinfo 46 3K 47 acpisem 22 3K 22 terminal 11 3K 11 session 22 3K 31 pgrp 22 3K 31 indirdep 10 3K 10 proc-args 46 3K 486 mkdir 19 3K 32 uidinfo 3 3K 7 local_apic 1 2K 1 io_apic 1 2K 1 ipsec-saq 2 2K 2 select 15 2K 15 CAM XPT 22 2K 543 lockf 15 2K 22 newdirblk 12 2K 16 sctp_atcl 3 2K 3 Unitno 25 2K 39 ip6ndp 8 2K 9 crypto 2 2K 2 acpidev 20 2K 20 msi 9 2K 9 softdep 1 1K 1 dirrem 4 1K 28 ipsecpolicy 1 1K 1 sahead 1 1K 1 secasvar 1 1K 1 sctp_ifa 8 1K 8 sctp_stro 1 1K 1 clone 8 1K 8 vnodemarker 2 1K 8 NFSD session 1 1K 1 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 pfil 4 1K 4 chacha20random 1 1K 1 CAM SIM 2 1K 2 epoch 4 1K 4 cdev 2 1K 2 encap_export_host 8 1K 8 mld 3 1K 3 sctp_ifn 3 1K 3 igmp 3 1K 3 tun 4 1K 4 osd 3 1K 9 freefile 2 1K 22 vnodes 1 1K 1 NFSD lckfile 1 1K 1 NFSD V4client 1 1K 1 DEVFS 9 1K 10 feeder 7 1K 7 inpcbpolicy 7 1K 135 loginclass 3 1K 6 sctp_atky 4 1K 4 soname 5 1K 5716 CAM dev queue 2 1K 2 CAM I/O Scheduler 1 1K 1 apmdev 1 1K 1 atkbddev 2 1K 2 CAM path 4 1K 1034 pmchooks 1 1K 1 prison 4 1K 4 filecaps 4 1K 66 nexusdev 5 1K 5 iov 2 1K 13087 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 sctp_athm 3 1K 3 cpus 2 1K 2 freework 1 1K 26 sctp_map 2 1K 2 vnet_data_free 1 1K 1 Per-cpu 1 1K 1 p1003.1b 1 1K 1 ath_hal 0 0K 0 athdev 0 0K 0 madt_table 0 0K 2 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 pvscsi 0 0K 0 smartpqi 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 iavf 0 0K 0 ixl 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 fpukern_ctx 0 0K 0 xen_intr 0 0K 0 ac97 0 0K 0 hdacc 0 0K 0 xen_hvm 0 0K 0 legacydrv 0 0K 0 qpidrv 0 0K 0 hdac 0 0K 0 hdaa 0 0K 0 dmar_idpgtbl 0 0K 0 dmar_dom 0 0K 0 dmar_ctx 0 0K 0 dmar_dmamap 0 0K 0 acpi_perf 0 0K 0 acpicmbat 0 0K 0 SIIS driver 0 0K 0 isci 0 0K 0 bxe_ilt 0 0K 0 xenbus 0 0K 0 CAM CCB 0 0K 1873 vm_fictitious 0 0K 0 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 ag_tgt_map_t malloc 0 0K 0 UMAHash 0 0K 0 ag_slr_map_t malloc 0 0K 0 lDevFlags * malloc 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 3 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 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 2 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_a_it 0 0K 5 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 tiDeviceHandle_t * malloc 0 0K 0 statfs 0 0K 188 export_host 0 0K 0 cl_savebuf 0 0K 2 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 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 CAM ccb queue 0 0K 0 mrsasbuf 0 0K 0 mpt_user 0 0K 0 mps_user 0 0K 0 biobuf 0 0K 0 aios 0 0K 0 lio 0 0K 0 acl 0 0K 0 MPSSAS 0 0K 0 mbuf_tag 0 0K 46 accf 0 0K 0 pts 0 0K 0 ioctlops 0 0K 90 Witness 0 0K 0 stack 0 0K 0 mps 0 0K 0 mpr_user 0 0K 0 MPRSAS 0 0K 0 mpr 0 0K 0 mfibuf 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 568 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 pwd 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 db> show ktr No such command; use "help" to list available commands