login: panic: sx_xlock() of destroyed sx @ /syzkaller/managers/main/kernel/sys/kern/uipc_sockbuf.c:393 cpuid = 1 time = 1574319135 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0022af9700 vpanic() at vpanic+0x1c7/frame 0xfffffe0022af9770 panic() at panic+0x43/frame 0xfffffe0022af97d0 _sx_xlock() at _sx_xlock+0x1ca/frame 0xfffffe0022af9820 sosend_generic() at sosend_generic+0x197/frame 0xfffffe0022af98e0 sosend() at sosend+0xc6/frame 0xfffffe0022af9950 kern_sendit() at kern_sendit+0x32d/frame 0xfffffe0022af9a00 sendit() at sendit+0x226/frame 0xfffffe0022af9a60 sys_sendto() at sys_sendto+0x5c/frame 0xfffffe0022af9ac0 amd64_syscall() at amd64_syscall+0x473/frame 0xfffffe0022af9bf0 fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0022af9bf0 --- syscall (198, FreeBSD ELF64, nosys), rip = 0x41329a, rsp = 0x7fffdffdcf38, rbp = 0x6 --- KDB: enter: panic [ thread pid 791 tid 100115 ] Stopped at kdb_enter+0x67: movq $0,0x14616d6(%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 0xffffffff818828f2 rbx 0 rsp 0xfffffe0022af96e0 rbp 0xfffffe0022af9700 rsi 0 rdi 0 r8 0 r9 0xffffffff r10 0 r11 0xfffff8003a82c4f0 r12 0xffffffff82068d60 ddb_dbbe r13 0 r14 0xffffffff81920800 r15 0xffffffff81920800 rip 0xffffffff810b2517 kdb_enter+0x67 rflags 0x82 ll+0x61 kdb_enter+0x67: movq $0,0x14616d6(%rip) db> show proc Process 791 (syz-executor.0) at 0xfffff8003a540a60: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 773 at 0xfffff8003a541000 ABI: FreeBSD ELF64 arguments: /root/syz-executor.0 reaper: 0xfffff800031f5530 reapsubtree: 1 sigparent: 20 vmspace: 0xfffff80003c2f000 (map 0xfffff80003c2f000) (map.pmap 0xfffff80003c2f0d0) (pmap 0xfffff80003c2f130) threads: 4 100107 RunQ syz-executor.0 100109 S select 0xfffff800039a5dc0 syz-executor.0 100115 Run CPU 1 syz-executor.0 100116 Run CPU 0 syz-executor.0 db> ps pid ppid pgrp uid state wmesg wchan cmd 802 796 802 0 Ss select 0xfffff800039a5a40 dhclient 799 1 799 0 Ss select 0xfffff800031ab940 dhclient 796 788 422 65 S select 0xfffff800039a5bc0 dhclient 791 773 773 0 R (threaded) syz-executor.0 100107 RunQ syz-executor.0 100109 S select 0xfffff800039a5dc0 syz-executor.0 100115 Run CPU 1 syz-executor.0 100116 Run CPU 0 syz-executor.0 788 422 422 0 S wait 0xfffff8003a549530 sh 773 771 773 0 Ss nanslp 0xffffffff824fc7e0 syz-executor.0 771 769 769 0 S (threaded) syz-execprog 100097 S uwait 0xfffff80003955a00 syz-execprog 100098 S uwait 0xfffff80003b8ba00 syz-execprog 100099 S kqread 0xfffff800031dc900 syz-execprog 100100 S uwait 0xfffff80003955600 syz-execprog 100101 S uwait 0xfffff80003b8b380 syz-execprog 100102 S uwait 0xfffff80003955180 syz-execprog 100104 S uwait 0xfffff80003955380 syz-execprog 100105 S uwait 0xfffff80003955480 syz-execprog 100106 S uwait 0xfffff80003b8b280 syz-execprog 769 767 769 0 Ss pause 0xfffff8003a541b08 csh 767 680 767 0 Ss select 0xfffff800031aba40 sshd 746 1 746 0 Ss+ ttyin 0xfffff8000373c8b0 getty 745 1 745 0 Ss+ ttyin 0xfffff80003a3a8b0 getty 744 1 744 0 Ss+ ttyin 0xfffff80003a3acb0 getty 743 1 743 0 Ss+ ttyin 0xfffff80003a3b0b0 getty 742 1 742 0 Ss+ ttyin 0xfffff80003a3b4b0 getty 741 1 741 0 Ss+ ttyin 0xfffff80003a3b8b0 getty 740 1 740 0 Ss+ ttyin 0xfffff80003a3bcb0 getty 739 1 739 0 Ss+ ttyin 0xfffff80003a3c0b0 getty 738 1 738 0 Ss+ ttyin 0xfffff80003a3c4b0 getty 736 1 22 0 S+ piperd 0xfffff80003c365f0 logger 735 734 22 0 S+ nanslp 0xffffffff824fc7e0 sleep 734 1 22 0 S+ wait 0xfffff80003b95000 sh 684 1 684 0 Ss nanslp 0xffffffff824fc7e1 cron 680 1 680 0 Ss select 0xfffff800039a5d40 sshd 493 1 493 0 Ss select 0xfffff800031abbc0 syslogd 422 1 422 0 Ss wait 0xfffff80003c88530 devd 421 1 421 65 Ss select 0xfffff800039a60c0 dhclient 336 1 336 0 Ss select 0xfffff800031ac140 dhclient 333 1 333 0 Ss select 0xfffff800031abc40 dhclient 21 0 0 0 DL vlruwt 0xfffff80003b96a60 [vnlru] 20 0 0 0 DL syncer 0xffffffff825d2cb0 [syncer] 19 0 0 0 DL (threaded) [bufdaemon] 100063 D qsleep 0xffffffff825d2158 [bufdaemon] 100066 D - 0xffffffff8200a900 [bufspacedaemon-0] 100080 D sdflush 0xfffff80003a5b8e8 [/ worker] 18 0 0 0 DL psleep 0xffffffff825ed588 [vmdaemon] 17 0 0 0 DL (threaded) [pagedaemon] 100061 D psleep 0xffffffff82619318 [dom0] 100064 D launds 0xffffffff82619324 [laundry: dom0] 100065 D umarcl 0xffffffff8152fe70 [uma] 16 0 0 0 DL - 0xffffffff82358420 [rand_harvestq] 15 0 0 0 DL waiting 0xffffffff8265e8f0 [sctp_iterator] 9 0 0 0 DL - 0xffffffff825d1b5c [soaiod4] 8 0 0 0 DL - 0xffffffff825d1b5c [soaiod3] 7 0 0 0 DL - 0xffffffff825d1b5c [soaiod2] 6 0 0 0 DL - 0xffffffff825d1b5c [soaiod1] 5 0 0 0 DL (threaded) [cam] 100031 D - 0xffffffff822337c0 [doneq0] 100060 D - 0xffffffff82233688 [scanner] 4 0 0 0 DL crypto_ 0xfffff800032cce90 [crypto returns 1] 3 0 0 0 DL crypto_ 0xfffff800032cce30 [crypto returns 0] 2 0 0 0 DL crypto_ 0xffffffff825e7c48 [crypto] 14 0 0 0 DL seqstat 0xfffff8000326dc88 [sequencer 00] 13 0 0 0 DL (threaded) [geom] 100022 D - 0xffffffff82617910 [g_event] 100023 D - 0xffffffff82617920 [g_up] 100024 D - 0xffffffff82617918 [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 [swi4: clock (0)] 100019 I [swi4: clock (1)] 100020 I [swi3: vm] 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 0xfffff800031f5530 [init] 10 0 0 0 DL audit_w 0xffffffff8265f580 [audit] 0 0 0 0 DLs (threaded) [kernel] 100000 D swapin 0xffffffff82607108 [swapper] 100006 D - 0xfffff800031d0c00 [thread taskq] 100008 D - 0xfffff800031dde00 [config_0] 100009 D - 0xfffff800031d0a00 [kqueue_ctx taskq] 100010 D - 0xfffff800031d0900 [aiod_kick taskq] 100012 D - 0xfffff800031ddd00 [if_io_tqg_0] 100013 D - 0xfffff800031ddc00 [if_io_tqg_1] 100014 D - 0xfffff800031ddb00 [if_config_tqg_0] 100015 D - 0xfffff800031dda00 [softirq_0] 100016 D - 0xfffff800031dd900 [softirq_1] 100021 D - 0xfffff800031d0700 [firmware taskq] 100026 D - 0xfffff800031d0600 [crypto_0] 100027 D - 0xfffff800031d0600 [crypto_1] 100041 D - 0xfffff800031d0400 [vtnet0 rxq 0] 100042 D - 0xfffff800031d0300 [vtnet0 txq 0] 100043 D - 0xfffff800031d0200 [vtnet0 rxq 1] 100044 D - 0xfffff800031d0100 [vtnet0 txq 1] 100048 D - 0xfffff800031cfe00 [mca taskq] 100051 D - 0xffffffff824fb561 [deadlkres] 100056 D - 0xfffff800039ad500 [acpi_task_0] 100057 D - 0xfffff800039ad500 [acpi_task_1] 100058 D - 0xfffff800039ad500 [acpi_task_2] 100059 D - 0xfffff800031d0500 [CAM taskq] db> show all locks Process 791 (syz-executor.0) thread 0xfffff8003a8396e0 (100116) exclusive sleep mutex eventhandler (eventhandler) r = 0 (0xffffffff82512db0) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_eventhandler.c:271 exclusive sleep mutex socket (socket) r = 0 (0xfffff80003d66a98) locked @ /syzkaller/managers/main/kernel/sys/netinet/tcp_usrreq.c:479 exclusive rw tcpinp (tcpinp) r = 0 (0xfffff8003a39a3f0) locked @ /syzkaller/managers/main/kernel/sys/netinet/tcp_usrreq.c:471 db> show malloc Type InUse MemUse Requests devbuf 4206 4793K 4230 vtbuf 24 1968K 46 callout 3 1672K 3 kobj 334 1336K 490 newblk 370 1117K 420 vfscache 4 1025K 4 inodedep 55 539K 79 pcb 24 537K 80 ufs_quota 1 512K 1 vfs_hash 1 512K 1 intr 4 388K 4 subproc 123 237K 876 acpica 1674 185K 48748 vnet_data 1 168K 1 pagedep 17 132K 22 tfo_ccache 1 128K 1 sysctloid 2096 110K 2158 sem 4 106K 4 DEVFS1 102 102K 113 linker 221 89K 243 bus 962 78K 3135 mtx_pool 2 72K 2 syncache 1 68K 1 acpitask 1 64K 1 ddb_capture 1 64K 1 module 496 62K 496 filedesc 5 37K 17 BPF 19 36K 19 gtaskqueue 22 34K 22 hostcache 1 32K 1 shm 1 32K 1 kdtrace 159 31K 1665 DEVFS3 121 31K 131 msg 4 30K 4 umtx 240 30K 240 DEVFS_RULE 56 27K 56 kbdmux 6 22K 6 temp 22 17K 1664 ufs_mount 3 17K 4 proc 3 17K 3 ifaddr 43 17K 43 tty 16 16K 16 tidhash 1 16K 1 ithread 87 15K 87 bus-sc 28 13K 1269 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 80 10K 421 bmsafemap 3 9K 47 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 cred 28 7K 240 ifnet 4 7K 4 CAM DEV 3 6K 508 ether_multi 73 6K 78 vt 11 6K 11 kqueue 52 6K 807 sglist 5 6K 5 CAM queue 5 6K 1522 in6_multi 41 5K 41 routetbl 37 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 44 evdev 4 4K 4 hhook 13 4K 13 session 23 3K 34 pgrp 23 3K 34 terminal 11 3K 11 acpisem 21 3K 21 select 21 3K 21 uidinfo 4 3K 4 proc-args 44 3K 509 dirrem 17 3K 28 local_apic 1 2K 1 io_apic 1 2K 1 ipsec-saq 2 2K 2 lockf 19 2K 29 CAM XPT 22 2K 542 Unitno 25 2K 39 ip6ndp 8 2K 9 acpidev 20 2K 20 crypto 2 2K 2 msi 9 2K 9 mkdir 8 1K 22 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 inpcbpolicy 11 1K 151 tun 4 1K 4 osd 3 1K 9 DEVFSP 5 1K 5 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 1030 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 5669 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 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 11 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 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 4 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 4 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 6 mpr 0 0K 0 statfs 0 0K 196 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 13369 ioctlops 0 0K 92 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 581 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