syzbot


panic: tcp_default_fb_init: connection ADDR in unexpected state NUM

Status: fixed on 2025/07/02 01:06
Reported-by: syzbot+902d31bb0e68a1e8c088@syzkaller.appspotmail.com
Fix commit: e0f7e7324884 tcp: remove an invalid KASSERT
First crash: 28d, last: 25d

Sample crash report:
panic: tcp_default_fb_init: connection 0xfffffe0077706a80 in unexpected state 10
cpuid = 0
time = 1751408767
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe0056e0b290
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe0056e0b3f0
vpanic() at vpanic+0x257/frame 0xfffffe0056e0b5b0
panic() at panic+0xb5/frame 0xfffffe0056e0b680
tcp_default_fb_init() at tcp_default_fb_init+0x697/frame 0xfffffe0056e0b6d0
tcp_ctloutput_set() at tcp_ctloutput_set+0x607/frame 0xfffffe0056e0b850
tcp_ctloutput() at tcp_ctloutput+0x128/frame 0xfffffe0056e0b950
sosetopt() at sosetopt+0x236/frame 0xfffffe0056e0bb50
kern_setsockopt() at kern_setsockopt+0x2b0/frame 0xfffffe0056e0bcc0
sys_setsockopt() at sys_setsockopt+0x77/frame 0xfffffe0056e0bd10
amd64_syscall() at amd64_syscall+0x4e2/frame 0xfffffe0056e0bf30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0056e0bf30
--- syscall (198, FreeBSD ELF64, __syscall), rip = 0x3a197a, rsp = 0x8245ccf08, rbp = 0x8245ccf80 ---
KDB: enter: panic
[ thread pid 890 tid 100184 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x25b7ed7(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0xfffffe006e600000
rdx                    0x7ffff
rbx         0xffffffff827bd9a0  .str.27
rsp         0xfffffe0056e0b3d0
rbp         0xfffffe0056e0b3f0
rsi                    0x80001
rdi         0xffffffff8161a939  printf+0x149
r8                           0
r9                  0xffffffff
r10                        0x3
r11         0xfffffe0054125550
r12         0xfffffe0054125000
r13         0xfffffffffffffffe
r14         0xffffffff827bd9a0  .str.27
r15                          0
rip         0xffffffff816044be  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x25b7ed7(%rip)
db> show proc
Process 890 (syz-executor) at 0xfffffe0054108560:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 764 at 0xfffffe0007826560
 ABI: FreeBSD ELF64
 flag: 0x10000080  flag2: 0
 arguments: ./syz-executor exec
 reaper: 0xfffffe0007809040 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe0054119b68
   (map 0xfffffe0054119b68)
   (map.pmap 0xfffffe0054119c08)
   (pmap 0xfffffe0054119c78)
 threads: 2
100147                   RunQ                                syz-executor
100184                   Run     CPU 0                       syz-executor
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
  890   764   764     0  R       (threaded)                  syz-executor
100147                   RunQ                                syz-executor
100184                   Run     CPU 0                       syz-executor
  889   765   765     0  R       (threaded)                  syz-executor
100181                   Run     CPU 1                       syz-executor
100182                   RunQ                                syz-executor
  887   766   766     0  R       (threaded)                  syz-executor
100144                   RunQ                                syz-executor
100179                   D       biowr   0xfffffe0007c028c8  syz-executor
  885   767   767     0  S       (threaded)                  syz-executor
100121                   S       nanslp  0xffffffff83b9d581  syz-executor
100176                   S       msgrcv  0xfffffe005853e168  syz-executor
100177                   S       uwait   0xfffffe006dce1380  syz-executor
  883     1   766     0  S       uwait   0xfffffe00584eca80  syz-executor
  878     1   765     0  S       uwait   0xfffffe00584ec580  syz-executor
  876     1   767     0  S       uwait   0xfffffe005824e300  syz-executor
  875     1   766     0  S       uwait   0xfffffe006dce1c00  syz-executor
  873     1   873     0  Ss      select  0xfffffe006dce05c0  rtsol
  870     1   870     0  Ss      select  0xfffffe006dce2240  rtsol
  869     0     0     0  DL      (threaded)                  [KTLS]
100116                   D       -       0xfffffe0053fd3000  [thr_0]
100158                   D       -       0xfffffe0053fd3080  [thr_1]
100159                   D       -       0xffffffff83caee28  [reclaim_0]
  868     1   868     0  Ss      select  0xfffffe00584ec940  rtsol
  864   780   424     0  S       kqread  0xfffffe005812a000  rtsol
  824     0     0     0  DL      aiordy  0xfffffe0054109ae0  [aiod4]
  823     0     0     0  DL      aiordy  0xfffffe005410a040  [aiod3]
  822     0     0     0  DL      aiordy  0xfffffe005410a5a0  [aiod2]
  821     0     0     0  DL      aiordy  0xfffffe005410ab00  [aiod1]
  780   770   424     0  S       wait    0xfffffe00540f2020  sh
  770   424   424     0  S       wait    0xfffffe00540f3b00  sh
  767   763   767     0  S       nanslp  0xffffffff83b9d581  syz-executor
  766   763   766     0  S       nanslp  0xffffffff83b9d580  syz-executor
  765   763   765     0  S       nanslp  0xffffffff83b9d581  syz-executor
  764   763   764     0  S       nanslp  0xffffffff83b9d580  syz-executor
  763   761   761     0  S       select  0xfffffe006dce1640  syz-executor
  761   759   761     0  Ss      sigsusp 0xfffffe00540f1b70  csh
  759   682   759     0  Ss      select  0xfffffe006dce1ec0  sshd
  748     1   748     0  Ss+     ttyin   0xfffffe0058287cb0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe00593f54b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe00593f58b0  getty
  745     1   745     0  Ss+     ttyin   0xfffffe00593f5cb0  getty
  744     1   744     0  Ss+     ttyin   0xfffffe0058286cb0  getty
  743     1   743     0  Ss+     ttyin   0xfffffe00593f60b0  getty
  742     1   742     0  Ss+     ttyin   0xfffffe00593f64b0  getty
  741     1   741     0  Ss+     ttyin   0xfffffe00593f68b0  getty
  740     1   740     0  Ss+     ttyin   0xfffffe00593f6cb0  getty
  738     1    18     0  S+      piperd  0xfffffe005980e420  logger
  737   736    18     0  S+      nanslp  0xffffffff83b9d580  sleep
  736     1    18     0  S+      wait    0xfffffe00540ce560  sh
  686     1   686     0  Ss      nanslp  0xffffffff83b9d581  cron
  682     1   682     0  Ss      select  0xfffffe006dce20c0  sshd
  495     1   495     0  Ss      select  0xfffffe006dce24c0  syslogd
  424     1   424     0  Ss      wait    0xfffffe0054008040  devd
  423     1   423    65  Ss      select  0xfffffe006dce2140  dhclient
  338     1   338     0  Ss      select  0xfffffe006dce21c0  dhclient
  335     1   335     0  Ss      select  0xfffffe005824e940  dhclient
   17     0     0     0  DL      syncer  0xffffffff83cbafa0  [syncer]
   16     0     0     0  DL      vlruwt  0xfffffe0007828040  [vnlru]
   15     0     0     0  DL      (threaded)                  [bufdaemon]
100080                   D       psleep  0xffffffff83cb9560  [bufdaemon]
100083                   D       -       0xffffffff83001ec0  [bufspacedaemon-0]
100094                   D       sdflush 0xfffffe00596b90e8  [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83d04400  [vmdaemon]
    8     0     0     0  DL      (threaded)                  [pagedaemon]
100078                   D       psleep  0xffffffff83cea4c8  [dom0]
100081                   D       launds  0xffffffff83cea4d4  [laundry: dom0]
100082                   D       umarcl  0xffffffff81ddaa50  [uma]
    7     0     0     0  DL      -       0xffffffff8391acd0  [rand_harvestq]
    6     0     0     0  DL      pftm    0xffffffff84858980  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff844da700  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100046                   D       -       0xffffffff838e5340  [doneq0]
100047                   D       -       0xffffffff838e52c0  [async]
100076                   D       -       0xffffffff838e5140  [scanner]
    3     0     0     0  DL      (threaded)                  [crypto]
100043                   D       crypto_ 0xffffffff83ce5d80  [crypto]
100044                   D       crypto_ 0xfffffe0007a72d30  [crypto returns 0]
100045                   D       crypto_ 0xfffffe0007a72d80  [crypto returns 1]
   14     0     0     0  DL      seqstat 0xfffffe0057cba488  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100037                   D       -       0xffffffff83b45f20  [g_event]
100038                   D       -       0xffffffff83b45f40  [g_up]
100039                   D       -       0xffffffff83b45f60  [g_down]
    2     0     0     0  WL      (threaded)                  [clock]
100031                   I                                   [clock (0)]
100032                   I                                   [clock (1)]
   12     0     0     0  WL      (threaded)                  [intr]
100013                   I                                   [swi6: task queue]
100014                   I                                   [swi6: Giant taskq]
100016                   I                                   [swi5: fast taskq]
100033                   I                                   [swi1: netisr 0]
100034                   I                                   [swi1: hpts]
100035                   I                                   [swi1: hpts]
100048                   I                                   [irq24: virtio_pci0]
100049                   I                                   [irq25: virtio_pci0]
100050                   I                                   [irq26: virtio_pci0]
100051                   I                                   [irq27: virtio_pci0]
100052                   I                                   [irq28: virtio_pci1]
100053                   I                                   [irq29: virtio_pci1]
100054                   I                                   [irq30: virtio_pci1]
100055                   I                                   [irq31: virtio_pci1]
100056                   I                                   [irq32: virtio_pci1]
100061                   I                                   [irq10: virtio_pci2]
100063                   I                                   [irq1: atkbd0]
100064                   I                                   [irq12: psm0]
100065                   I                                   [swi0: uart uart++]
100069                   I                                   [swi1: pf send]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe0007809040  [init]
   10     0     0     0  DL      audit_w 0xffffffff83ce6820  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       parked  0xffffffff84c36ff0  [swapper]
100005                   D       -       0xfffffe0053ea0100  [softirq_0]
100006                   D       -       0xfffffe0053ea0000  [softirq_1]
100007                   D       -       0xfffffe0053e9fe00  [if_io_tqg_0]
100008                   D       -       0xfffffe0053e9fd00  [if_io_tqg_1]
100009                   D       -       0xfffffe0053e9fc00  [if_config_tqg_0]
100010                   D       -       0xfffffe0007764900  [kqueue_ctx taskq]
100011                   D       -       0xfffffe0007764800  [jail_remove taskq]
100012                   D       -       0xfffffe0007764700  [bus taskq]
100015                   D       -       0xfffffe0007764200  [thread taskq]
100017                   D       -       0xfffffe0007763e00  [aiod_kick taskq]
100018                   D       -       0xfffffe0007763d00  [deferred_unmount ta]
100019                   D       -       0xfffffe0007763c00  [inm_free taskq]
100020                   D       -       0xfffffe0007763b00  [in6m_free taskq]
100021                   D       -       0xfffffe0007763a00  [linuxkpi_irq_wq]
100022                   D       -       0xfffffe0007763900  [linuxkpi_short_wq_0]
100023                   D       -       0xfffffe0007763900  [linuxkpi_short_wq_1]
100024                   D       -       0xfffffe0007763900  [linuxkpi_short_wq_2]
100025                   D       -       0xfffffe0007763900  [linuxkpi_short_wq_3]
100026                   D       -       0xfffffe0007763800  [linuxkpi_long_wq_0]
100027                   D       -       0xfffffe0007763800  [linuxkpi_long_wq_1]
100028                   D       -       0xfffffe0007763800  [linuxkpi_long_wq_2]
100029                   D       -       0xfffffe0007763800  [linuxkpi_long_wq_3]
100036                   D       -       0xfffffe0007763300  [firmware taskq]
100041                   D       -       0xfffffe0007763200  [crypto_0]
100042                   D       -       0xfffffe0007763200  [crypto_1]
100057                   D       -       0xfffffe005812c000  [vtnet0 rxq 0]
100058                   D       -       0xfffffe005812be00  [vtnet0 txq 0]
100059                   D       -       0xfffffe005812bd00  [vtnet0 rxq 1]
100060                   D       -       0xfffffe005812bc00  [vtnet0 txq 1]
100062                   D       vtbslp  0xfffffe0058250f00  [virtio_balloon]
100066                   D       -       0xffffffff827c2d41  [deadlkres]
100070                   D       -       0xfffffe00593da400  [acpi_task_0]
100071                   D       -       0xfffffe00593da400  [acpi_task_1]
100072                   D       -       0xfffffe00593da400  [acpi_task_2]
100074                   D       -       0xfffffe0007766c00  [mca taskq]
100075                   D       -       0xfffffe0007763100  [CAM taskq]
100077                   D       -       0xfffffe005812b500  [ipsec_offload]
db> show all locks
Process 890 (syz-executor) thread 0xfffffe0054125000 (100184)
exclusive rw tcpinp (tcpinp) r = 0 (0xfffffe0077706aa0) locked @ /syzkaller/managers/main/kernel/sys/netinet/tcp_usrreq.c:1734
Process 887 (syz-executor) thread 0xfffffe0054126000 (100179)
exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe0007c02948) locked @ /syzkaller/managers/main/kernel/sys/kern/vfs_bio.c:4022
exclusive lockmgr ufs (ufs) r = 0 (0xfffffe006e4b23e0) locked @ /syzkaller/managers/main/kernel/sys/kern/vfs_subr.c:3384
exclusive lockmgr bufwait (bufwait) r = 0 (0xfffffe0007cf0a40) locked @ /syzkaller/managers/main/kernel/sys/ufs/ffs/ffs_vnops.c:328
exclusive lockmgr ufs (ufs) r = 0 (0xfffffe006e46e908) locked @ /syzkaller/managers/main/kernel/sys/ufs/ufs/ufs_vnops.c:1311
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            6        12804K            6
            linker          376         5071K          494
          tcp_hpts            7         4801K            7
            devbuf         4188         4324K         4213
         sysctloid        35104         2068K        35179
             vtbuf           24         1968K           46
              kobj          331         1324K          495
            newblk           24         1030K          924
          vfscache            3         1025K            3
               pcb           35          676K           86
          inodedep           21          520K          156
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          130          278K          958
         vnet_data            2          224K            2
          acpitask            1          224K            1
          filedesc           26          201K          119
            KTRACE          101          201K         3082
            acpica         1674          184K        54426
              vmem            5          144K            6
           tidhash            3          141K            3
           pagedep           15          132K           58
        tfo_ccache            1          128K            1
          IP reass            1          128K            1
            DEVFS1          109          109K          126
               sem            4          106K            4
        gtaskqueue           18           98K           18
               bus          997           82K         5063
          mtx_pool            3           74K            3
          syncache            1           68K            1
     NFSD srvcache            3           68K            3
            module          521           66K          521
       ddb_capture            1           64K            1
           kdtrace          203           39K         1076
              umtx          304           38K          304
              temp           35           37K         1855
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          128           32K          138
               msg            4           30K            4
            kbdmux            6           28K            6
        DEVFS_RULE           56           20K           56
               BPF           16           20K           16
            ifaddr           66           19K           68
         ufs_mount            4           17K            5
              proc            3           17K            3
               LRO           16           17K           16
               tty           16           16K           16
          routetbl          124           16K          395
           ithread           90           15K           90
            bus-sc           34           15K         1647
           lltable           44           14K           44
      eventhandler          163           14K          163
             ifnet            7           13K            7
       ether_multi          152           13K          162
              kenv           95           12K           95
              GEOM           61           11K          477
         CAM queue            5           11K         1528
              rman           82           10K          437
               rpc            8            9K            8
         in6_multi           65            9K           65
         bmsafemap            2            9K          115
            plimit           22            9K          317
           devstat            4            9K            4
              UART           12            9K           12
              ksem            1            8K            1
             shmfd            1            8K            2
       pfs_vncache            1            8K            1
     audit_evclass          239            8K          301
         taskqueue           69            8K           78
            kqueue           68            8K          940
            sglist            6            7K            6
              cred           24            6K          191
           CAM DEV            3            6K          510
         pfs_nodes           22            6K           22
       ufs_dirhash           24            5K           24
               UMA          268            5K          268
          pf_ifnet           10            5K           19
      tcp_fsb_rack            2            5K            4
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
           pwddesc           63            4K          893
           acpisem           28            4K           28
             selfd           49            4K        29370
            DEVFSP           49            4K           61
             mount           20            4K          205
           session           23            3K           35
         proc-args           90            3K         1926
          terminal           11            3K           11
           acpidev           20            3K           20
             lockf           22            3K           54
             hhook            8            3K           10
             clone            9            3K            9
           uidinfo            3            3K            8
          kcovinfo           36            3K           36
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           14
            Unitno           31            2K           50
          sctp_ifa           13            2K           14
           CAM XPT           22            2K          543
         sctp_atcl            4            2K           12
          in_multi            6            2K            8
               tun            4            2K            4
            select           12            2K           36
         toponodes            6            2K            6
       ipsecpolicy            2            2K            2
            CC Mem           10            2K           31
               msi            9            2K            9
         newdirblk            9            2K           43
           netlink            2            2K           72
         sctp_stro            1            1K            1
           softdep            1            1K            1
            diradd            8            1K          104
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           20
      NFSD session            1            1K            1
        CAM periph            4            1K          271
             ipsec            3            1K            3
          sctp_ifn            6            1K           14
            dirrem            3            1K           86
             mkdir            6            1K           86
       inpcbpolicy           24            1K          212
               mld            6            1K            6
              igmp            6            1K            6
              pfil            6            1K            6
            isadev            6            1K            6
          pci_link           10            1K           10
               osd           15            1K           47
            crypto            4            1K           11
 encap_export_host           12            1K           12
          procdesc            4            1K           10
              cdev            2            1K            2
       lkpikmalloc            8            1K            9
      counter_rate           14            1K           14
             frag6            4            1K            7
    chacha20random            1            1K            1
            biobuf            1            1K            1
         cryptodev            5            1K           51
            ip6opt            2            1K           10
      tcp_pcm_rack            1            1K            2
          indirdep            1            1K           67
            vnodes            1            1K            1
              ktls            1            1K            5
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
           CAM SIM            2            1K            2
            feeder            7            1K            7
         sctp_atky            5            1K           13
           tcpfunc            3            1K            3
        loginclass            3            1K            5
            prison            6            1K            6
          nexusdev            8            1K            8
            apmdev            1            1K            1
          atkbddev            2            1K            2
          freefile            1            1K           63
           VN POLL            1            1K            2
               aio            4            1K            4
          pmchooks            1            1K            1
          CAM path            4            1K         1034
     CAM dev queue            2            1K            2
 CAM I/O Scheduler            1            1K            1
            soname            4            1K         3328
          filecaps            4            1K           78
          sctp_vrf            1            1K            1
         sctp_athm            4            1K           12
       ip6_msource            1            1K            1
              vnet            1            1K            1
               pmc            1            1K            1
           entropy            2            1K           33
          acpiintr            1            1K            1
          sctp_map            2            1K            2
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          freework            1            1K          143
          p1003.1b            1            1K            1
          pf_table            0            0K            0
           pf_rule            0            0K            0
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
     pf_krule_item            0            0K            0
           pf_temp            0            0K            0
            ipcomp            0            0K            0
               esp            0            0K            0
                ah            0            0K            0
       tcp_do_rack            0            0K            0
            mqdata            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K            1
         sctp_iter            0            0K           12
         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           12
         sctp_aadr            0            0K            0
         sctp_stri            0            0K            0
           filemon            0            0K            2
        madt_table            0            0K            2
          smartpqi            0            0K            0
               ixl            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
              iavf            0            0K            0
             axgbe            0            0K            0
       fpukern_ctx            0            0K            0
          xen_intr            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
      NMI handlers            0            0K            0
            bounce            0            0K            0
            busdma            0            0K            0
            qpidrv            0            0K            0
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320    1078       13146       0     254   38494208        0
           tcp_log    416    1544    4810        9892       0     254    2643264        0
              mbuf    256    8666     996       17842       0     254    2473472        0
          BUF TRIE    152     220   11584         816       0      62    1794208        0
       malloc-4096   4096     395       1        1391       0       2    1622016        0
        malloc-384    384    4173      27        4517       0      30    1612800        0
        malloc-128    128   11537     181       11663       0     126    1499904        0
       UMA Slabs 0    112   10959      15       10959       0     126    1229088        0
      mbuf_cluster   2048     508       0         508       0     254    1040384        0
        RADIX NODE    152    6269     434       28633       0      62    1018856        0
         malloc-64     64     111   15639       29733       0     254    1008000        0
         vmem btag     56   16966      65       16966       0     254     953736        0
         FFS inode   1168     527      26         590       0       8     645904        0
      malloc-65536  65536       9       0          12       0       1     589824        0
           sctp_ep   1152       3     508          11       0     254     588672        0
         sctp_asoc   2256       1     254           1       0     254     575280        0
            socket   1024      46     462        1438       0     254     520192        0
          lkpicurr    168       2    3094           2       0      62     520128        0
              pbuf   2624       0     182           0       0       2     477568        0
        256 Bucket   2048     205      11        1224       0       8     442368        0
      malloc-65536  65536       4       2         174       0       1     393216        0
         VM OBJECT    248    1190      58       14066       0      62     309504        0
         malloc-64     64    4136     463        5651       0     254     294336        0
            THREAD   1860     139      13         184       0       8     282720        0
             VNODE    440     566      64         631       0      30     277200        0
      malloc-16384  16384      13       2          59       0       1     245760        0
         malloc-16     16   14511     489       14598       0     254     240000        0
        malloc-256    256     278     652        1609       0      62     238080        0
       malloc-2048   2048     108       4         120       0       8     229376        0
            DEVCTL   1024      22     198         147       0       0     225280        0
      malloc-32768  32768       3       3         126       0       1     196608        0
        sctp_raddr    736       1     263           1       0     254     194304        0
         UMA Zones    768     240       4         240       0      16     187392        0
         malloc-32     32    5427     243        6978       0     254     181440        0
        malloc-128    128    1212     183       25370       0     126     178560        0
            lkpimm     56       1    3095           1       0     254     173376        0
             unpcb    320      16     500        1183       0     254     165120        0
      malloc-32768  32768       0       5          42       0       1     163840        0
         MAP ENTRY     96    1440     198       44442       0     126     157248        0
     FPU_save_area    832     141      39         213       0      16     149760        0
       malloc-2048   2048       8      64         623       0       8     147456        0
       malloc-1024   1024     124      20        1323       0      16     147456        0
       FFS2 dinode    256     527      43         590       0      62     145920        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       2       0           2       0       1     131072        0
       mbuf_packet    256       4     504         180       0     254     130048        0
       S VFS Cache    104    1002     168        1090       0     126     121680        0
          ksiginfo    112      55     989          99       0     126     116928        0
        malloc-128    128     770     129        1864       0     126     115072        0
        malloc-128    128     565     210        3917       0     126      99200        0
              PROC   1376      62       4         890       0       8      90816        0
          UMA Kegs    384     226       7         226       0      30      89472        0
             g_bio    408       4     206        6417       0      30      85680        0
        128 Bucket   1024      47      36         251       0      16      84992        0
         filedesc0   1072      63      14         893       0       8      82544        0
      malloc-16384  16384       4       1         194       0       1      81920        0
         malloc-64     64     684     387        3370       0     254      68544        0
      malloc-65536  65536       0       1           8       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
       malloc-4096   4096      13       3          66       0       2      65536        0
       malloc-4096   4096      12       4          20       0       2      65536        0
       malloc-2048   2048      10      22         732       0       8      65536        0
         64 Bucket    512      85      43        1744       0      30      65536        0
        malloc-256    256     153     102         225       0      62      65280        0
       malloc-8192   8192       6       1         113       0       1      57344        0
    ertt_txseginfo     40       0    1313        1315       0     254      52520        0
         malloc-64     64     531     288         775       0     254      52416        0
        malloc-128    128      15     388         283       0     126      51584        0
        malloc-256    256      84     111         159       0      62      49920        0
        malloc-256    256      88     107         922       0      62      49920        0
         32 Bucket    256      65     130        1019       0      62      49920        0
           DIRHASH   1024      34      14          34       0      16      49152        0
             NAMEI   1024       2      46       12992       0      16      49152        0
       malloc-8192   8192       6       0           7       0       1      49152        0
       malloc-1024   1024      14      34         541       0      16      49152        0
        malloc-384    384      39      81         176       0      30      46080        0
            da_ccb    544       1      83        1722       0      16      45696        0
          syncache    168       0     264           3       0     254      44352        0
         tcp_inpcb   1304      10      23          31       0       8      43032        0
            vnpbuf   2624       0      16           2       0      16      41984        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4719     401        4876       0     254      40960        0
           VMSPACE    584      41      29         870       0      16      40880        0
         udp_inpcb    408       7      83         162       0      30      36720        0
         malloc-64     64       7     560       13427       0     254      36288        0
         malloc-64     64     165     402         203       0     254      36288        0
         malloc-64     64      27     540         310       0     254      36288        0
         malloc-64     64      10     557          35       0     254      36288        0
        malloc-128    128      88     191         168       0     126      35712        0
        malloc-128    128      69     210          96       0     126      35712        0
        malloc-128    128      11     268         420       0     126      35712        0
     routing nhops    256      26     109          34       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        malloc-384    384      68      22          95       0      30      34560        0
        malloc-384    384      53      37         349       0      30      34560        0
        malloc-256    256      10     125         471       0      62      34560        0
        malloc-256    256      29     106          96       0      62      34560        0
        malloc-256    256      26     109         417       0      62      34560        0
        malloc-256    256      16     119         531       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       0       1          11       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-16384  16384       2       0           2       0       1      32768        0
       malloc-8192   8192       3       1           5       0       1      32768        0
       malloc-4096   4096       5       3         566       0       2      32768        0
       malloc-4096   4096       6       2           9       0       2      32768        0
       malloc-2048   2048       4      12          27       0       8      32768        0
       malloc-2048   2048       3      13           3       0       8      32768        0
       malloc-2048   2048       9       7           9       0       8      32768        0
       malloc-2048   2048       6      10          24       0       8      32768        0
       malloc-1024   1024       2      30          11       0      16      32768        0
       malloc-1024   1024       6      26           6       0      16      32768        0
       malloc-1024   1024      16      16          23       0      16      32768        0
       malloc-1024   1024      10      22          10       0      16      32768        0
        malloc-512    512       2      62          24       0      30      32768        0
        malloc-512    512      12      52          30       0      30      32768        0
        malloc-512    512       3      61         174       0      30      32768        0
        malloc-512    512       3      61          21       0      30      32768        0
        malloc-512    512       4      60           5       0      30      32768        0
           pcpu-64     64     497      15         497       0     254      32768        0
            ttyinq    160     135      65         300       0      62      32000        0
              PGRP    120      27     237          39       0     126      31680        0
            clpbuf   2624       0      12          60       0       4      31488        0
        sctp_laddr     48       1     587          13       0     254      28224        0
         malloc-32     32     350     532         443       0     254      28224        0
         16 Bucket    144      64     132         297       0      62      28224        0
          4 Bucket     48       6     582          10       0     254      28224        0
         TURNSTILE    136     153      36         153       0      62      25704        0
            cpuset    200       8     120          47       0      62      25600        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-8192   8192       2       1          21       0       1      24576        0
              pipe    736      20      13         328       0      16      24288        0
               PWD     40      22     584         120       0     254      24240        0
           rtentry    168      29     115          34       0      62      24192        0
             Files     80     204      96        7188       0     126      24000        0
          8 Bucket     80      54     246         328       0     126      24000        0
        malloc-384    384      12      48          20       0      30      23040        0
        malloc-384    384      27      33          38       0      30      23040        0
             ripcb    376       6      54          18       0      30      22560        0
       Mountpoints   2816       2       6           2       0       4      22528        0
        SLEEPQUEUE     88     153     103         153       0     126      22528        0
         hostcache     64       1     314           1       0     254      20160        0
              ertt     72      10     270          31       0     126      20160        0
         malloc-32     32      77     553         316       0     254      20160        0
         malloc-32     32      34     596        1514       0     254      20160        0
         malloc-32     32      34     596        2708       0     254      20160        0
         malloc-32     32      35     595         191       0     254      20160        0
         malloc-32     32      17     613          33       0     254      20160        0
          2 Bucket     32      57     573         352       0     254      20160        0
             KNOTE    160       4     121          33       0      62      20000        0
       tcp_bbr_map    128       0     155          84       0     126      19840        0
      tcp_rack_map    128       3     152           6       0     126      19840        0
      ktls_session    256       0      75           1       0      62      19200        0
       L VFS Cache    320       0      60           4       0      30      19200        0
              vmem   1856       2       7           2       0       8      16704        0
 epoch_record pcpu    256       4      60           4       0      62      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-4096   4096       0       4         238       0       2      16384        0
       malloc-4096   4096       4       0           5       0       2      16384        0
       malloc-2048   2048       0       8           2       0       8      16384        0
       malloc-1024   1024       1      15           3       0      16      16384        0
       malloc-1024   1024       3      13           3       0      16      16384        0
        malloc-512    512       0      32           2       0      30      16384        0
        malloc-512    512       1      31           1       0      30      16384        0
           SMR CPU     32       8     503           8       0     254      16352        0
       tcp_bbr_pcb    896       0      18           1       0      16      16128        0
         malloc-16     16     506     494        3433       0     254      16000        0
               AIO    208       1      75           6       0      62      15808        0
              kenv    258      17      43        1065       0      30      15480        0
      tcp_rack_pcb   1088       1      13           2       0       8      15232        0
            mqnode    416       3      33           3       0      30      14976        0
     udplite_inpcb    408       1      35           1       0      30      14688        0
         domainset     40       0     315          39       0     254      12600        0
        SMR SHARED     24       8     503           8       0     254      12264        0
         malloc-32     32     152     226         931       0     254      12096        0
         malloc-16     16       1     749         132       0     254      12000        0
         malloc-16     16      12     738          82       0     254      12000        0
         malloc-16     16      16     734        1321       0     254      12000        0
         malloc-16     16      56     694       24886       0     254      12000        0
         malloc-16     16      51     699        1538       0     254      12000        0
           cryptop    280       0      42           1       0      30      11760        0
            itimer    352       0      33           1       0      30      11616        0
             AIOCB    552       0      21           7       0      16      11592        0
        malloc-384    384       1      29           1       0      30      11520        0
        malloc-384    384       1      29           1       0      30      11520        0
            AIOLIO    272       0      42           2       0      30      11424        0
tfo_ccache_entries     80       1     127           1       0     126      10240        0
       malloc-8192   8192       0       1           2       0       1       8192        0
       malloc-4096   4096       0       2           2       0       2       8192        0
           pcpu-16     16       8     504           8       0     254       8192        0
      vtnet_tx_hdr     24       0     334        1583       0     254       8016        0
         malloc-16     16       4     496           5       0     254       8000        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
       FFS1 dinode    128       0       0           0       0     126          0        0
           ada_ccb    272       0       0           0       0      30          0        0
             swblk    136       0       0           0       0      62          0        0
          swpctrie    152       0       0           0       0      62          0        0
   cdg_qdiffsample     16       0       0           0       0     254          0        0
   pf state scrubs     40       0       0           0       0     254          0        0
   pf frag entries     40       0       0           0       0     254          0        0
  pf fragment node     72       0       0           0       0     126          0        0
          pf frags    232       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0     254          0        0
pf table entry counters     64       0       0           0       0     254          0        0
   pf UDP mappings    104       0       0           0       0     126          0        0
   pf source nodes    152       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    384       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags    184       0       0           0       0      62          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       0       0           0       0     254          0        0
               ipq     56       0       0           0       0     254          0        0
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
sctp_stream_msg_out    112       0       0           0       0     254          0        0
        sctp_readq    152       0       0           0       0     254          0        0
        sctp_chunk    152       0       0           0       0     254          0        0
   tcp_log_id_node    120       0       0           0       0     126          0        0
 tcp_log_id_bucket    176       0       0           0       0      62          0        0
          tcpreass     48       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
        TMPFS node    240       0       0           0       0      62          0        0
           NCLNODE    608       0       0           0       0      16          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
  linux_dma_object     32       0       0           0       0     254          0        0
  linux_dma_pctrie    152       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    112       0       0           0       0     126          0        0
            skbuff   1808       0       0           0       0       8          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
        MAC labels     40       0       0           0       0     254          0        0
           nfspbuf   2624       0       0           0       0       4          0        0
            swwbuf   2624       0       0           0       0       2          0        0
            swrbuf   2624       0       0           0       0       4          0        0
          umtx_shm     88       0       0           0       0     126          0        0
           umtx pi     96       0       0           0       0     126          0        0
rangeset pctrie nodes    152       0       0           0       0      62          0        0
          rl_entry     48       0       0           0       0     254          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-65536  65536       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-32768  32768       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
        malloc-512    512       0       0           0       0      30          0        0
           pcpu-32     32       0       0           0       0     254          0        0
            pcpu-4      4       0       0           0       0     254          0        0
            fakepg     88       0       0           0       0     126          0        0
          UMA Hash    256       0       0           0       0      62          0        0
db> show all tcpcbs/bl
tcpcb at 0xfffffe0077706a80
  t_segq first: 0   t_segqlen: 0   t_dupacks: 0
  t_callout: 0xfffffe0077706c08   t_timers: 0xfffffe0077706c48
  t_state: 10 (TCPS_TIME_WAIT)
  t_flags: 0x18000018 (TF_NOOPT, TF_SENTFIN, TF_SENTSYN, TF_LRD)
  t_flags2: 0x1800a (TF2_PLPMTU_PMTUD, TF2_LOG_AUTO, TF2_MBUF_ACKCMP, TF2_SUPPORTS_MBUFQ)
  snd_una: 0xb838cc26   snd_max: 0xb838cc26   snd_nxt: 0xb838cc26
  snd_up: 0xb838cc26   snd_wl1: 0xb838cc25   snd_wl2: 0xb838cc25
  iss: 0xb838cc24   irs: 0xb838cc24   rcv_nxt: 0xb838cc26
  rcv_adv: 0xb839cc25   rcv_wnd: 65536   rcv_up: 0xb838cc25
  snd_wnd: 65535   snd_cwnd: 5361
  snd_ssthresh: 1073725440   snd_recover: 0xb838cc26
  t_rcvtime: 2147428303   t_startime: 2147428303
  t_rttime: 2147428302   t_rtsq: 0xb838cc24
  t_rxtcur: 1220000   t_maxseg: 536   t_srtt: 0
  t_rttvar: 255000   t_rxtshift: 0   t_rttmin: 3
  t_rttupdated: 0   max_sndwnd: 65535   t_softerror: 0
  t_oobflags: 0x0 ()   t_iobc: 0x00
  snd_scale: 0   rcv_scale: 0   request_r_scale: 6
  ts_recent: 0   ts_recent_age: 0
  ts_offset: 929139770   last_ack_sent: 0xb838cc26   snd_cwnd_prev: 0
  snd_ssthresh_prev: 0   snd_recover_prev: 0x00000000   t_badrxtwin: 0
  snd_numholes: 0  snd_holes first: 0
  snd_fack: 0x00000000   rcv_numsacks: 0
  t_rttlow: 1   rfbuf_ts: 0   rfbuf_cnt: 0
  t_fb.tfb_tcp_block_name: rack
  t_cc.name: cubic
  _t_logstate: 1 (TCP_LOG_STATE_TAIL)
  t_lognum: 41   t_loglimit: 5000   t_logsn: 41
     0.000 ATTACH, error: 0
    +0.000 BIND, error: 0
    +0.000
    +0.000
    +0.000
    +0.000
    +0.000
    +0.000 Starting Keepalive timer: 75000 ms
    +0.000 > S 3090730020:3090730020(0) win 65535
    +0.000
    +0.000
    +0.000 CONNECT, error: 0
    +0.000 < S 3090730020:3090730020(0) win 65535
    +0.002 > S. 3090730020:3090730020(0) ack 3090730021 win 65535
    +0.000
    +0.000
    +0.000 < S. 3090730020:3090730020(0) ack 3090730021 win 65535
    +0.000 > . 3090730021:3090730021(0) ack 3090730021 win 65535
    +0.000
    +0.000
    +0.000
    +0.000 < . 3090730021:3090730021(0) ack 3090730021 win 65535
    +0.000
    +0.000
    +0.000 > F. 3090730021:3090730021(0) ack 3090730021 win 65535
    +0.000
    +0.000
    +0.000 usersend: rcv.acc: 0 rcv.ccc: 0 snd.acc: 0 snd.ccc: 0
    +0.000 SEND_EOF, error: 0
    +0.000
    +0.000 < F. 3090730021:3090730021(0) ack 3090730021 win 65535
    +0.000
    +0.000
    +0.000 > F. 3090730021:3090730021(0) ack 3090730022 win 65535
    +0.000
    +0.000
    +0.000
    +0.000 < F. 3090730021:3090730021(0) ack 3090730022 win 65535
    +0.000
    +0.000 > . 3090730022:3090730022(0) ack 3090730022 win 65535
    +0.000 Starting 2 MSL timer: 20 ms

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/01 22:26 freebsd-src 039fedc441cc 091a06cd console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/07/01 20:54 freebsd-src 039fedc441cc 091a06cd console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/07/01 13:55 freebsd-src 039fedc441cc 091a06cd console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 23:59 freebsd-src 5c0eb439cfad 6e83b42d console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 21:25 freebsd-src 5c0eb439cfad 6e83b42d console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 14:24 freebsd-src 171f66b0c2ca fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 03:44 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 03:05 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 00:14 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/30 00:13 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/29 16:48 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/29 16:47 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/29 16:47 freebsd-src afa70490ee77 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/29 08:22 freebsd-src edc307eca9a9 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
2025/06/28 17:46 freebsd-src 3a33e39edd48 fc9d8ee5 console log report ci-freebsd-main panic: tcp_default_fb_init: connection ADDR in unexpected state NUM
* Struck through repros no longer work on HEAD.