syzbot


panic: /syzkaller/managers/i386/kernel/sys/netinet/in_pcb.c:LINE: in_pcblbgroup_insert: Bad list head ADDR first->prev !

Status: upstream: reported on 2025/05/11 20:17
Reported-by: syzbot+5566b8835a488b1d95d9@syzkaller.appspotmail.com
First crash: 19d, last: 19d

Sample crash report:
panic: /syzkaller/managers/i386/kernel/sys/netinet/in_pcb.c:341: in_pcblbgroup_insert: Bad list head 0xfffffe00546e8410 first->prev != head
cpuid = 0
time = 1746994560
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc6/frame 0xfffffe00576a1550
kdb_backtrace() at kdb_backtrace+0xd0/frame 0xfffffe00576a16b0
vpanic() at vpanic+0x257/frame 0xfffffe00576a1870
panic() at panic+0xb5/frame 0xfffffe00576a1940
in_pcblbgroup_insert() at in_pcblbgroup_insert+0x1f8/frame 0xfffffe00576a1980
in_pcbinslbgrouphash() at in_pcbinslbgrouphash+0x576/frame 0xfffffe00576a19f0
in_pcbinshash() at in_pcbinshash+0x414/frame 0xfffffe00576a1a60
in6_pcbbind() at in6_pcbbind+0x36b/frame 0xfffffe00576a1ad0
tcp6_usr_bind() at tcp6_usr_bind+0x2ed/frame 0xfffffe00576a1bc0
sobind() at sobind+0xc3/frame 0xfffffe00576a1c10
kern_bindat() at kern_bindat+0x2c6/frame 0xfffffe00576a1cd0
sys_bind() at sys_bind+0xf5/frame 0xfffffe00576a1d10
ia32_syscall() at ia32_syscall+0x48e/frame 0xfffffe00576a1f30
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xdfffcf98
KDB: enter: panic
[ thread pid 1057 tid 100470 ]
Stopped at      kdb_enter+0x6e: movq    $0,0x25bda97(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                           0
rax                       0x12
rcx         0xfffffe006f000000
rdx                    0x7ffff
rbx         0xffffffff827aff60  .str.27
rsp         0xfffffe00576a1690
rbp         0xfffffe00576a16b0
rsi                    0x80001
rdi         0xffffffff81614589  printf+0x149
r8                           0
r9                  0xffffffff
r10          0x100000000000000
r11         0xfffffe005495dc60
r12         0xfffffe005495d740
r13         0xfffffffffffffffe
r14         0xffffffff827aff60  .str.27
r15                          0
rip         0xffffffff815fe6fe  kdb_enter+0x6e
rflags                    0x46
kdb_enter+0x6e: movq    $0,0x25bda97(%rip)
db> show proc
Process 1057 (syz-executor) at 0xfffffe0054933ae0:
 state: NORMAL
 uid: 60929  gids: 0, 0, 5
 parent: pid 765 at 0xfffffe00548f45c0
 ABI: FreeBSD ELF32
 flag: 0x10000180  flag2: 0
 arguments: ./syz-executor exec
 reaper: 0xfffffe0008009040 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe0054926db0
   (map 0xfffffe0054926db0)
   (map.pmap 0xfffffe0054926e50)
   (pmap 0xfffffe0054926ec0)
 threads: 2
100316                   RunQ                                syz-executor
100470                   Run     CPU 0                       syz-executor
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 1058   764   764     0  R       (threaded)                  syz-executor
100322                   Run     CPU 1                       syz-executor
100471                   S       fifoor  0xfffffe00886d2068  syz-executor
100472                   S       uwait   0xfffffe008d416180  syz-executor
 1057   765   765 60929  R       (threaded)                  syz-executor
100316                   RunQ                                syz-executor
100470                   Run     CPU 0                       syz-executor
 1056     1   764     0  S       uwait   0xfffffe0058d0a880  syz-executor
 1051     1   767     0  S       uwait   0xfffffe0058d08200  syz-executor
 1048     1   767     0  S       uwait   0xfffffe008d415f00  syz-executor
 1043     1   764 60929  S       uwait   0xfffffe0058d0ab80  syz-executor
 1034     1   764     0  S       uwait   0xfffffe0058d0a980  syz-executor
 1028     1   767     0  S       uwait   0xfffffe0058d07d00  syz-executor
 1020     1   764     0  S       uwait   0xfffffe0058951500  syz-executor
 1016     0     0     0  DL      mdwait  0xfffffe00886df000  [md16]
 1007     0     0     0  DL      -       0xffffffff83cad400  [soaiod4]
 1006     0     0     0  DL      -       0xffffffff83cad400  [soaiod3]
 1005     0     0     0  DL      -       0xffffffff83cad400  [soaiod2]
 1004     0     0     0  DL      -       0xffffffff83cad400  [soaiod1]
  993     1   764     0  S       uwait   0xfffffe006e6cd780  syz-executor
  990     1   767     0  S       uwait   0xfffffe006e6cd680  syz-executor
  980     1   767     0  S       uwait   0xfffffe006e6cd280  syz-executor
  975   969   969     0  D       tun_con 0xfffffe0059ececa8  ifconfig
  973     1   764     0  S       uwait   0xfffffe005894fe80  syz-executor
  972     1   764     0  T                                   syz-executor
  971     1   764     0  T       uwait   0xfffffe006e6ce600  syz-executor
  969   763   969     0  S       wait    0xfffffe00548f4060  syz-executor
  958     0     0     0  DL      mdwait  0xfffffe0089a2b000  [md15]
  956     0     0     0  DL      mdwait  0xfffffe00873cf000  [md14]
  954     1   954     0  S       uwait   0xfffffe006e6cd080  syz-executor
  952     1   765     0  S       uwait   0xfffffe006e6cde00  syz-executor
  948     1   764 60929  S       uwait   0xfffffe006e6cc600  syz-executor
  945     1   767     0  S       uwait   0xfffffe006e6cc200  syz-executor
  944     1   767     0  S       uwait   0xfffffe0058d08400  syz-executor
  942     1   767     0  S       uwait   0xfffffe006e6ce400  syz-executor
  930     1   766     0  S       uwait   0xfffffe0058d09100  syz-executor
  921     1   765 60929  S       uwait   0xfffffe006e6cce00  syz-executor
  909     0     0     0  DL      mdwait  0xfffffe00873d0000  [md13]
  908     1   765     0  S       uwait   0xfffffe0058d09200  syz-executor
  903     0     0     0  DL      mdwait  0xfffffe0083adf000  [md12]
  900     0     0     0  DL      (threaded)                  [so_splice]
100234                   D       -       0xfffffe0058e3d280  [thr_0]
100235                   D       -       0xfffffe0058e3d2c0  [thr_1]
  894     0     0     0  DL      mdwait  0xfffffe00814ef000  [md11]
  892     0     0     0  DL      mdwait  0xfffffe0083ae0000  [md10]
  886     0     0     0  DL      mdwait  0xfffffe00801ec000  [md9]
  883     0     0     0  DL      mdwait  0xfffffe00814f0000  [md8]
  878     1   765     0  S       uwait   0xfffffe006e6cdf00  syz-executor
  876     0     0     0  DL      mdwait  0xfffffe00801ee000  [md7]
  872     0     0     0  DL      mdwait  0xfffffe007c907000  [md6]
  871     1   766     0  S       uwait   0xfffffe006e6cda00  syz-executor
  865     0     0     0  DL      mdwait  0xfffffe005a115000  [md5]
  864     1   764     0  S       uwait   0xfffffe0058951400  syz-executor
  860     0     0     0  DL      mdwait  0xfffffe007c908000  [md4]
  849     1   849     0  S       umtxn   0xfffffe006e6ce080  syz-executor
  848     1   765     0  S       uwait   0xfffffe0058d08d80  syz-executor
  845   836   845     0  Ss      select  0xfffffe0059f19ec0  dhclient
  839     1   839     0  Ss      select  0xfffffe006e3fc0c0  dhclient
  836   817   424    65  S       select  0xfffffe006eba06c0  dhclient
  830     0     0     0  DL      mdwait  0xfffffe005a116000  [md3]
  827     0     0     0  DL      mdwait  0xfffffe0078eaf000  [md2]
  820     1   765 60929  S       uwait   0xfffffe0058950c80  syz-executor
  818     0     0     0  DL      mdwait  0xfffffe0078eb0000  [md1]
  817   424   424     0  S       wait    0xfffffe00548d8580  sh
  810     0     0     0  DL      mdwait  0xfffffe0008bfb000  [md0]
  808     0     0     0  DL      aiordy  0xfffffe00549035a0  [aiod4]
  807     0     0     0  DL      aiordy  0xfffffe0054903b00  [aiod3]
  806     0     0     0  DL      aiordy  0xfffffe00548f2580  [aiod2]
  805     0     0     0  DL      aiordy  0xfffffe00548f2ae0  [aiod1]
  767   763   767     0  D       bo_wwai 0xfffffe005a056320  syz-executor
  765   763   765     0  S       nanslp  0xffffffff83b9d500  syz-executor
  764   763   764     0  R                                   syz-executor
  763   761   761     0  S       select  0xfffffe0059e964c0  syz-executor
  761   759   761     0  Ss      pause   0xfffffe00080260b0  csh
  759   682   759     0  Ss      select  0xfffffe0059e965c0  sshd
  748     1   748     0  Ss+     ttyin   0xfffffe0058a9c8b0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe0059cbf8b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe0059cc00b0  getty
  745     1   745     0  Ss+     ttyin   0xfffffe0059cc08b0  getty
  744     1   744     0  Ss+     ttyin   0xfffffe005476d0b0  getty
  743     1   743     0  Ss+     ttyin   0xfffffe005476d8b0  getty
  742     1   742     0  Ss+     ttyin   0xfffffe005476e0b0  getty
  741     1   741     0  Ss+     ttyin   0xfffffe005476e8b0  getty
  740     1   740     0  Ss+     ttyin   0xfffffe005476f0b0  getty
  738     1    18     0  S+      piperd  0xfffffe005a064140  logger
  737   736    18     0  S+      nanslp  0xffffffff83b9d501  sleep
  736     1    18     0  S+      wait    0xfffffe00548f2020  sh
  686     1   686     0  Ss      nanslp  0xffffffff83b9d500  cron
  682     1   682     0  Ss      select  0xfffffe006e3fd840  sshd
  495     1   495     0  Ss      select  0xfffffe006e3fddc0  syslogd
  424     1   424     0  Ss      wait    0xfffffe0054808040  devd
  423     1   423    65  Ss      select  0xfffffe006e3fdb40  dhclient
  338     1   338     0  Ss      select  0xfffffe006e3fda40  dhclient
  335     1   335     0  Ss      select  0xfffffe006e3fdcc0  dhclient
   17     0     0     0  DL      syncer  0xffffffff83cbada0  [syncer]
   16     0     0     0  DL      vlruwt  0xfffffe0008028040  [vnlru]
   15     0     0     0  DL      (threaded)                  [bufdaemon]
100080                   D       psleep  0xffffffff83cb9360  [bufdaemon]
100084                   D       -       0xffffffff83002140  [bufspacedaemon-0]
100094                   D       sdflush 0xfffffe0058ddfce8  [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83d04380  [vmdaemon]
    8     0     0     0  DL      (threaded)                  [pagedaemon]
100078                   D       psleep  0xffffffff83cea2f8  [dom0]
100083                   D       launds  0xffffffff83cea304  [laundry: dom0]
100085                   D       umarcl  0xffffffff81dceb60  [uma]
    7     0     0     0  DL      -       0xffffffff8391acd0  [rand_harvestq]
    6     0     0     0  DL      pftm    0xffffffff844d8850  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff847c9700  [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_ 0xffffffff83ce5b40  [crypto]
100044                   D       crypto_ 0xfffffe0058566330  [crypto returns 0]
100045                   D       crypto_ 0xfffffe0058566380  [crypto returns 1]
   14     0     0     0  DL      seqstat 0xfffffe00547edc88  [sequencer 00]
   13     0     0     0  DL      (threaded)                  [geom]
100037                   D       -       0xffffffff83b45f00  [g_event]
100038                   D       -       0xffffffff83b45f20  [g_up]
100039                   D       -       0xffffffff83b45f40  [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    0xfffffe0008009040  [init]
   10     0     0     0  DL      audit_w 0xffffffff83ce65e0  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       parked  0xffffffff84c2cff0  [swapper]
100005                   D       -       0xfffffe005462d700  [softirq_0]
100006                   D       -       0xfffffe005462d600  [softirq_1]
100007                   D       -       0xfffffe005462d500  [if_io_tqg_0]
100008                   D       -       0xfffffe005462d400  [if_io_tqg_1]
100009                   D       -       0xfffffe005462d300  [if_config_tqg_0]
100010                   D       -       0xfffffe0008bf9500  [kqueue_ctx taskq]
100011                   D       -       0xfffffe0008bf9300  [jail_remove taskq]
100012                   D       -       0xfffffe0008bf9100  [bus taskq]
100015                   D       -       0xfffffe0008bf8a00  [thread taskq]
100017                   D       -       0xfffffe0008bf8600  [aiod_kick taskq]
100018                   D       -       0xfffffe0008bf8400  [deferred_unmount ta]
100019                   D       -       0xfffffe0008bf8200  [inm_free taskq]
100020                   D       -       0xfffffe0008bf8000  [in6m_free taskq]
100021                   D       -       0xfffffe0008bf7d00  [linuxkpi_irq_wq]
100022                   D       -       0xfffffe0008bf7b00  [linuxkpi_short_wq_0]
100023                   D       -       0xfffffe0008bf7b00  [linuxkpi_short_wq_1]
100024                   D       -       0xfffffe0008bf7b00  [linuxkpi_short_wq_2]
100025                   D       -       0xfffffe0008bf7b00  [linuxkpi_short_wq_3]
100026                   D       -       0xfffffe0008bf7600  [linuxkpi_long_wq_0]
100027                   D       -       0xfffffe0008bf7600  [linuxkpi_long_wq_1]
100028                   D       -       0xfffffe0008bf7600  [linuxkpi_long_wq_2]
100029                   D       -       0xfffffe0008bf7600  [linuxkpi_long_wq_3]
100036                   D       -       0xfffffe0008bf6a00  [firmware taskq]
100041                   D       -       0xfffffe0008bf6300  [crypto_0]
100042                   D       -       0xfffffe0008bf6300  [crypto_1]
100057                   D       -       0xfffffe0058565900  [vtnet0 rxq 0]
100058                   D       -       0xfffffe0058565800  [vtnet0 txq 0]
100059                   D       -       0xfffffe0058565700  [vtnet0 rxq 1]
100060                   D       -       0xfffffe0058565600  [vtnet0 txq 1]
100062                   D       vtbslp  0xfffffe005858d000  [virtio_balloon]
100066                   D       -       0xffffffff827b52a0  [deadlkres]
100070                   D       -       0xfffffe0058d0dd00  [acpi_task_0]
100071                   D       -       0xfffffe0058d0dd00  [acpi_task_1]
100072                   D       -       0xfffffe0058d0dd00  [acpi_task_2]
100074                   D       -       0xfffffe0008bfa100  [mca taskq]
100075                   D       -       0xfffffe0058566000  [CAM taskq]
100077                   D       -       0xfffffe0058564400  [ipsec_offload]
db> show all locks
Process 1058 (syz-executor) thread 0xfffffe00548a2740 (100322)
exclusive sleep mutex umtxql (umtxql) r = 0 (0xffffffff83baa4b0) locked @ /syzkaller/managers/i386/kernel/sys/kern/kern_umtx.c:1297
Process 1057 (syz-executor) thread 0xfffffe005495d740 (100470)
exclusive sleep mutex tcphash (tcphash) r = 0 (0xfffffe0008249a70) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:313
exclusive rw tcpinp (tcpinp) r = 0 (0xfffffe008e822aa0) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_usrreq.c:286
Process 975 (ifconfig) thread 0xfffffe0054938740 (100338)
exclusive sx ifnet_detach_sx (ifnet_detach_sx) r = 0 (0xffffffff83cbb580) locked @ /syzkaller/managers/i386/kernel/sys/net/if.c:3027
Process 767 (syz-executor) thread 0xfffffe00548f9740 (100121)
exclusive lockmgr ufs (ufs) r = 0 (0xfffffe005a056228) locked @ /syzkaller/managers/i386/kernel/sys/kern/vfs_subr.c:3373
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            6        12804K            6
        md_sectors         1275         5100K         1275
            linker          376         5063K          502
          tcp_hpts            7         4801K            7
            devbuf         4188         4324K         4230
         sysctloid        36880         2173K        36955
             vtbuf           24         1968K           46
              kobj          331         1324K          648
              vmem            5         1040K            8
            newblk           34         1033K         1238
          vfscache            3         1025K            3
               pcb           52          688K          230
          filedesc           72          570K          482
          inodedep           20          520K          505
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          227          466K         1187
         vnet_data            2          224K            2
          acpitask            1          224K            1
            KTRACE          101          201K         9549
            acpica         1674          184K        54426
           tidhash            3          141K            3
           pagedep           14          132K          269
        tfo_ccache            1          128K            1
          IP reass            1          128K            1
            DEVFS1          126          126K          143
           md_disk         1292          108K         1294
               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          284           52K         1535
              umtx          384           48K          384
              temp           34           38K         2051
               BPF           24           37K           34
            DEVFS3          145           37K          155
               shm            3           36K            6
         hostcache            1           32K            1
               msg            4           30K            4
              GEOM          180           28K         1004
            kbdmux            6           28K            6
            CC Mem          179           23K          857
        DEVFS_RULE           56           20K           56
            ifaddr           67           19K           69
               LRO           18           19K           18
         ufs_mount            4           17K            5
              proc            3           17K            3
           devstat            8           17K            8
               tty           16           16K           16
          routetbl          130           16K          410
           ithread           90           15K           90
            bus-sc           34           15K         1647
           lltable           45           14K           47
      eventhandler          163           14K          163
             ifnet            7           13K            7
       ether_multi          152           13K          167
              kenv           95           12K           95
             shmfd            7           11K           21
         CAM queue            5           11K         1528
              rman           82           10K          437
              cred           37           10K          316
            plimit           24            9K          341
               rpc            8            9K            8
         in6_multi           65            9K           66
         bmsafemap            2            9K          433
              UART           12            9K           12
              ksem            1            8K            2
           filemon            1            8K            2
       pfs_vncache            1            8K            1
     audit_evclass          239            8K          301
         taskqueue           69            8K           72
            kqueue          105            7K         1177
           pwddesc          105            7K         1072
       inpcbpolicy          200            7K         1189
            sglist            6            7K            6
           CAM DEV            3            6K          510
         pfs_nodes           22            6K           22
       ufs_dirhash           24            5K           42
               UMA          283            5K          283
          pf_ifnet           10            5K           20
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
            DEVFSP           61            4K          132
           acpisem           28            4K           28
               osd          184            4K          873
         proc-args          111            4K         2107
             selfd           49            4K        29549
         sctp_atcl            8            3K           41
          kcovinfo           45            3K           45
          terminal           11            3K           11
           session           22            3K           35
           uidinfo            5            3K           11
           acpidev           20            3K           20
             lockf           22            3K          277
             hhook            8            3K           10
             clone            9            3K            9
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           13
            Unitno           28            2K           56
          sctp_ifa           13            2K           14
           CAM XPT           22            2K          543
          in_multi            6            2K            8
               tun            4            2K            4
            select           12            2K           52
         toponodes            6            2K            6
            ip6opt           10            2K           28
       ipsecpolicy            2            2K            2
         newdirblk           10            2K          231
               msi            9            2K            9
            crypto            7            2K           18
           netlink            2            2K           77
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           38
      NFSD session            1            1K            1
             mount           19            1K          860
        CAM periph            4            1K          271
             ipsec            3            1K            3
          sctp_ifn            6            1K           14
               mld            6            1K            6
              igmp            6            1K            6
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8322    1076       15317       0     254   38494208        0
       malloc-4096   4096    1380       2        2358       0       2    5660672        0
         vmem btag     56   99391      80       99391       0     254    5570376        0
              mbuf    256    8680     982       22711       0     254    2473472        0
        RADIX NODE    152   13017     264       37905       0      62    2018712        0
          BUF TRIE    152     221   11583        1131       0      62    1794208        0
        malloc-384    384    4167      33        4180       0      30    1612800        0
        malloc-128    128   12281     212       16448       0     126    1599104        0
       malloc-4096   4096     353       5        1237       0       2    1466368        0
       UMA Slabs 0    112   12428      22       12428       0     126    1394400        0
         sctp_asoc   2256       0     510           2       0     254    1150560        0
         malloc-64     64     333   17496       29976       0     254    1141056        0
      malloc-65536  65536      15       1          18       0       1    1048576        0
      mbuf_cluster   2048     508       0         508       0     254    1040384        0
            socket   1024     225     539        2576       0     254     782336        0
      malloc-16384  16384      39       3         243       0       1     688128        0
         FFS inode   1168     549      32         918       0       8     678608        0
           sctp_ep   1152       8     503          39       0     254     588672        0
          lkpicurr    168       2    3094           2       0      62     520128        0
              pbuf   2624       0     198           0       0       2     519552        0
        256 Bucket   2048     218       0        6708       0       8     446464        0
         VM OBJECT    248    1498      54       16300       0      62     384896        0
        sctp_raddr    736       0     517           2       0     254     380512        0
            THREAD   1824     178      14         473       0       8     350208        0
             VNODE    440     589     104         960       0      30     304920        0
              md16      8   37462     130       37462       0     254     300736        0
              md15      8   37462     130       37462       0     254     300736        0
              md14      8   37462     130       37462       0     254     300736        0
              md13      8   37462     130       37462       0     254     300736        0
              md12      8   37462     130       37462       0     254     300736        0
              md11      8   37462     130       37462       0     254     300736        0
              md10      8   37462     130       37462       0     254     300736        0
               md9      8   37462     130       37462       0     254     300736        0
               md8      8   37462     130       37462       0     254     300736        0
               md7      8   37462     130       37462       0     254     300736        0
               md6      8   37462     130       37462       0     254     300736        0
               md5      8   37462     130       37462       0     254     300736        0
               md4      8   37462     130       37462       0     254     300736        0
               md3      8   37462     130       37462       0     254     300736        0
               md2      8   37462     130       37462       0     254     300736        0
               md1      8   37462     130       37462       0     254     300736        0
               md0      8   37462     130       37462       0     254     300736        0
         malloc-64     64    4391     208       13155       0     254     294336        0
       malloc-2048   2048     110      26         668       0       8     278528        0
         tcp_inpcb   1304     179      13         857       0       8     250368        0
         malloc-16     16   15300     200       18794       0     254     248000        0
         malloc-32     32    7123     311        9499       0     254     237888        0
            DEVCTL   1024      50     170         182       0       0     225280        0
         MAP ENTRY     96    2121     147       54964       0     126     217728        0
           tcp_log    416       0     513         226       0     254     213408        0
         UMA Zones    768     255       4         255       0      16     198912        0
      malloc-65536  65536       1       2          10       0       1     196608        0
      malloc-32768  32768       1       5         109       0       1     196608        0
        malloc-128    128    1311     208       25804       0     126     194432        0
       malloc-1024   1024     158      18         180       0      16     180224        0
            lkpimm     56       1    3095           1       0     254     173376        0
              PROC   1376     104      17        1060       0       8     166496        0
             unpcb    320      13     503        1268       0     254     165120        0
     FPU_save_area    832     180      18         659       0      16     164736        0
       FFS2 dinode    256     549      81         918       0      62     161280        0
       S VFS Cache    104    1014     390        1415       0     126     146016        0
         filedesc0   1072     105      21        1072       0       8     135072        0
      malloc-65536  65536       0       2          63       0       1     131072        0
      malloc-65536  65536       0       2         110       0       1     131072        0
       malloc-2048   2048       7      57         626       0       8     131072        0
       mbuf_packet    256      12     496         318       0     254     130048        0
          ksiginfo    112      97     947         145       0     126     116928        0
        malloc-128    128     645     254        2016       0     126     115072        0
        malloc-256    256      35     400        1530       0      62     111360        0
      malloc-32768  32768       3       0           3       0       1      98304        0
      malloc-32768  32768       2       1           3       0       1      98304        0
       malloc-4096   4096      20       4         261       0       2      98304        0
          UMA Kegs    384     242       1         242       0      30      93312        0
        malloc-128    128     443     208        1602       0     126      83328        0
        malloc-384    384     149      61         634       0      30      80640        0
        malloc-256    256     192     123         786       0      62      80640        0
       malloc-8192   8192       5       4         168       0       1      73728        0
              pipe    736      24      75         455       0      16      72864        0
        128 Bucket   1024      57      10         282       0      16      68608        0
         malloc-64     64     646     425       15743       0     254      68544        0
        malloc-128    128     300     227         367       0     126      67456        0
           DIRHASH   1024      34      30          46       0      16      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       0       2         120       0       1      65536        0
       malloc-8192   8192       6       2           8       0       1      65536        0
         64 Bucket    512      88      40        2275       0      30      65536        0
        malloc-256    256     211      44        1378       0      62      65280        0
         32 Bucket    256      77     178         573       0      62      65280        0
             g_bio    408       4     146        8248       0      30      61200        0
       malloc-4096   4096      11       3          21       0       2      57344        0
         malloc-64     64     458     361         657       0     254      52416        0
             Files     80     392     258        9267       0     126      52000        0
        malloc-128    128       7     396         266       0     126      51584        0
        malloc-256    256     157      38         411       0      62      49920        0
        malloc-256    256      66     129        1728       0      62      49920        0
        malloc-256    256      78     117         180       0      62      49920        0
        malloc-256    256      71     124        1035       0      62      49920        0
             NAMEI   1024       1      47       14856       0      16      49152        0
       malloc-2048   2048      15       9          31       0       8      49152        0
       malloc-2048   2048      11      13          44       0       8      49152        0
       malloc-1024   1024       8      40        1059       0      16      49152        0
       malloc-1024   1024      11      37         521       0      16      49152        0
           VMSPACE    584      62      22        1017       0      16      49056        0
          syncache    168       0     264           3       0     254      44352        0
       malloc-8192   8192       5       0           6       0       1      40960        0
            pcpu-8      8    4820     300        5078       0     254      40960        0
            da_ccb    544       1      69        2091       0      16      38080        0
         udp_inpcb    408      10      80         228       0      30      36720        0
         malloc-64     64     113     454         147       0     254      36288        0
         malloc-64     64      14     553          15       0     254      36288        0
         malloc-64     64      49     518         409       0     254      36288        0
         malloc-64     64      15     552         720       0     254      36288        0
        malloc-128    128     141     138         293       0     126      35712        0
        malloc-128    128      11     268          18       0     126      35712        0
     routing nhops    256      27     108          50       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        malloc-384    384      63      27          63       0      30      34560        0
         TURNSTILE    136     193      59         193       0      62      34272        0
             ripcb    376      11      79          91       0      30      33840        0
        SLEEPQUEUE     88     193     191         193       0     126      33792        0
      malloc-32768  32768       0       1           5       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-16384  16384       2       0           2       0       1      32768        0
      malloc-16384  16384       0       2         190       0       1      32768        0
       malloc-8192   8192       2       2          21       0       1      32768        0
       malloc-8192   8192       4       0           4       0       1      32768        0
       malloc-4096   4096       4       4           9       0       2      32768        0
       malloc-4096   4096       5       3          13       0       2      32768        0
       malloc-2048   2048       1      15          13       0       8      32768        0
       malloc-2048   2048       7       9           7       0       8      32768        0
       malloc-2048   2048       0      16          50       0       8      32768        0
       malloc-2048   2048       3      13         196       0       8      32768        0
       malloc-1024   1024       2      30         110       0      16      32768        0
       malloc-1024   1024       4      28          51       0      16      32768        0
       malloc-1024   1024      10      22         167       0      16      32768        0
        malloc-512    512       2      62         112       0      30      32768        0
        malloc-512    512       4      60          89       0      30      32768        0
        malloc-512    512       1      63          47       0      30      32768        0
        malloc-512    512       8      56          65       0      30      32768        0
        malloc-512    512       8      56          14       0      30      32768        0
           pcpu-64     64     496      16         496       0     254      32768        0
       tcp_bbr_pcb    896       0      36          29       0      16      32256        0
            ttyinq    160     135      65         300       0      62      32000        0
   tcp_log_id_node    120       0     264          24       0     126      31680        0
              PGRP    120      29     235          45       0     126      31680        0
            clpbuf   2624       0      12          43       0       4      31488        0
        sctp_laddr     48       0     588          12       0     254      28224        0
              ertt     72     179     213         857       0     126      28224        0
          rl_entry     48       5     583           5       0     254      28224        0
         malloc-32     32     248     634        1812       0     254      28224        0
         16 Bucket    144      63     133         326       0      62      28224        0
          4 Bucket     48       6     582           9       0     254      28224        0
               AIO    208       1     132          67       0      62      27664        0
     udplite_inpcb    408       0      63          13       0      30      25704        0
            cpuset    200       7     121           7       0      62      25600        0
       malloc-8192   8192       1       2          82       0       1      24576        0
 tcp_log_id_bucket    176       0     138          22       0      62      24288        0
    ertt_txseginfo     40       1     605        1009       0     254      24240        0
               PWD     40      41     565         277       0     254      24240        0
           rtentry    168      30     114          50       0      62      24192        0
          8 Bucket     80      53     247        1361       0     126      24000        0
        malloc-384    384       1      59          23       0      30      23040        0
        malloc-384    384       1      59          37       0      30      23040        0
        malloc-384    384       1      59         344       0      30      23040        0
        malloc-384    384      21      39          24       0      30      23040        0
        malloc-384    384      33      27         383       0      30      23040        0
       Mountpoints   2816       2       6          15       0       4      22528        0
         hostcache     64       2     313           2       0     254      20160        0
         malloc-32     32      71     559          97       0     254      20160        0
         malloc-32     32      81     549          83       0     254      20160        0
         malloc-32     32     117     513        1287       0     254      20160        0
         malloc-32     32      84     546         449       0     254      20160        0
         malloc-32     32      33     597         763       0     254      20160        0
         malloc-32     32      77     553        2725       0     254      20160        0
          2 Bucket     32      69     561        1086       0     254      20160        0
             KNOTE    160       0     125          37       0      62      20000        0
       tcp_bbr_map    128       0     155          12       0     126      19840        0
             AIOCB    552       0      35         229       0      16      19320        0
       L VFS Cache    320       0      60          41       0      30      19200        0
        malloc-256    256      16      59         316       0      62      19200        0
            AIOLIO    272       0      70          26       0      30      19040        0
              vmem   1856       2       7           2       0       8      16704        0
 epoch_record pcpu    256       4      60           4       0      62      16384        0
      malloc-16384  16384       0       1           1       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-8192   8192       1       1           2       0       1      16384        0
       malloc-4096   4096       0       4          41       0       2      16384        0
       malloc-1024   1024       1      15           1       0      16      16384        0
        malloc-512    512       3      29           8       0      30      16384        0
        malloc-512    512       0      32           1       0      30      16384        0
           SMR CPU     32       8     503           8       0     254      16352        0
               ipq     56       1     287           1       0     254      16128        0
         malloc-16     16     232     768         998       0     254      16000        0
         malloc-16     16     312     688        1107       0     254      16000        0
              kenv    258      17      43        1067       0      30      15480        0
      tcp_rack_pcb   1088       0      14           2       0       8      15232        0
            mqnode    416       3      33           3       0      30      14976        0
        SMR SHARED     24       8     503           8       0     254      12264        0
         malloc-16     16      44     706          92       0     254      12000        0
         malloc-16     16     188     562        3017       0     254      12000        0
         malloc-16     16      35     715       24965       0     254      12000        0
         malloc-16     16      28     722         125       0     254      12000        0
           cryptop    280       0      42           3       0      30      11760        0
            itimer    352       0      33           6       0      30      11616        0
            splice    184       0      63           3       0      62      11592        0
       malloc-4096   4096       1       1           4       0       2       8192        0
           pcpu-16     16       8     504           8       0     254       8192        0
      vtnet_tx_hdr     24       0     334        1719       0     254       8016        0
         malloc-16     16      18     482          19       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 frags    256       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
      tcp_rack_map    128       0       0           0       0     126          0        0
tfo_ccache_entries     80       0       0           0       0     126          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       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
          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
         domainset     40       0       0           0       0     254          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf   2624       0       0           0       0      16          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
      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-1024   1024       0       0           0       0      16          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    104       0       0           0       0     126          0        0
          UMA Hash    256       0       0           0       0      62          0        0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/11 20:16 freebsd-src b0dd1a604810 77908e5f console log report ci-freebsd-i386 panic: /syzkaller/managers/i386/kernel/sys/netinet/in_pcb.c:LINE: in_pcblbgroup_insert: Bad list head ADDR first->prev !
* Struck through repros no longer work on HEAD.