syzbot


panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/..

Status: fixed on 2021/05/22 04:14
Reported-by: syzbot+0e487eb1a4806fa73d65@syzkaller.appspotmail.com
Fix commit: 39756885633f rack: honor prior socket buffer lock when doing the upcall
First crash: 625d, last: 625d

Sample crash report:
panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/../../../netinet/tcp_stacks/rack.c:10632

cpuid = 1
time = 1621642894
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0003779310
vpanic() at vpanic+0x1c7/frame 0xfffffe0003779370
panic() at panic+0x43/frame 0xfffffe00037793d0
__mtx_lock_sleep() at __mtx_lock_sleep+0x6e9/frame 0xfffffe0003779460
__mtx_lock_flags() at __mtx_lock_flags+0x150/frame 0xfffffe00037794c0
rack_do_established() at rack_do_established+0x127b/frame 0xfffffe00037795d0
rack_do_segment_nounlock() at rack_do_segment_nounlock+0x2649/frame 0xfffffe00037797d0
rack_do_segment() at rack_do_segment+0x121/frame 0xfffffe0003779850
tcp_input_with_port() at tcp_input_with_port+0x13d5/frame 0xfffffe00037799b0
tcp_input() at tcp_input+0x1f/frame 0xfffffe00037799d0
ip_input() at ip_input+0x38b/frame 0xfffffe0003779a90
swi_net() at swi_net+0x20d/frame 0xfffffe0003779b10
ithread_loop() at ithread_loop+0x33f/frame 0xfffffe0003779bb0
fork_exit() at fork_exit+0xb3/frame 0xfffffe0003779bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0003779bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100032 ]
Stopped at      kdb_enter+0x67: movq    $0,0x16390de(%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         0xffffffff81138d00  vprintf+0x140
rdx                        0x1
rbx                          0
rsp         0xfffffe00037792f0
rbp         0xfffffe0003779310
rsi                          0
rdi         0xffffffff81138d36  vprintf+0x176
r8                           0
r9          0x8080808080808080
r10         0xfffffe00037791e0
r11              0x1fffcfff59c
r12         0xffffffff82267b80  ddb_dbbe
r13                          0
r14         0xffffffff81a73bac
r15         0xffffffff81a73bac
rip         0xffffffff8112fd27  kdb_enter+0x67
rflags                    0x86
kdb_enter+0x67: movq    $0,0x16390de(%rip)
db> show proc
Process 12 (intr) at 0xfffff80004c5ca70:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff8271c330
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff8271c330 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff8271cfb0
   (map 0xffffffff8271cfb0)
   (map.pmap 0xffffffff8271d070)
   (pmap 0xffffffff8271d0d0)
 threads: 23
100012                   I                                   [swi5: fast taskq]
100015                   I                                   [swi6: task queue]
100017                   I                                   [swi6: Giant taskq]
100030                   I                                   [swi4: clock (0)]
100031                   I                                   [swi4: clock (1)]
100032                   Run     CPU 1                       [swi1: netisr 0]
100033                   I                                   [swi3: vm]
100046                   I                                   [irq24: virtio_pci0]
100047                   I                                   [irq25: virtio_pci0]
100048                   I                                   [irq26: virtio_pci0]
100049                   I                                   [irq27: virtio_pci0]
100050                   I                                   [irq28: virtio_pci1]
100051                   I                                   [irq29: virtio_pci1]
100052                   I                                   [irq30: virtio_pci1]
100053                   I                                   [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq10: virtio_pci2]
100061                   I                                   [irq1: atkbd0]
100062                   I                                   [irq12: psm0]
100063                   I                                   [swi0: uart uart++]
100071                   I                                   [swi1: pf send]
100084                   Run     CPU 0                       [swi1: hpts]
100085                   I                                   [swi1: hpts]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
18331   804   804     0  R       (threaded)                  syz-executor.2
120484                   RunQ                                syz-executor.2
120572                   RunQ                                syz-executor.2
18329   851   851     0  R       (threaded)                  syz-executor.3
120482                   RunQ                                syz-executor.3
120570                   S       uwait   0xfffff800659f4900  syz-executor.3
120573                   S       uwait   0xfffff8006575fd00  syz-executor.3
18328   782   782     0  S       (threaded)                  syz-executor.0
119540                   S       nanslp  0xffffffff8273c560  syz-executor.0
120569                   S       ksem    0xfffff80065ba6b18  syz-executor.0
120574                   S       uwait   0xfffff800658d5900  syz-executor.0
18229     1 18229     0  S       uwait   0xfffff800659a8f00  syz-executor.2
18223     1 18223     0  S       uwait   0xfffff8003be13300  syz-executor.2
18186     1 18186     0  S       uwait   0xfffff800658d5700  syz-executor.3
18037 18036   782     0  S       uwait   0xfffff800658d5d00  syz-executor.0
18036     1   782     0  SV      ksem    0xfffff8006565c118  syz-executor.0
18029 18028 18029     0  S       uwait   0xfffff80061fc4100  syz-executor.0
18028     1   782     0  SV      ksem    0xfffff80065b72b18  syz-executor.0
17991     1 17991     0  S       uwait   0xfffff80061fc4b00  syz-executor.0
17988     1 17988     0  S       umtxn   0xfffff8003bd66500  syz-executor.0
17731     1   851     0  S       uwait   0xfffff80061fc4d00  syz-executor.3
17631     1   804     0  S       uwait   0xfffff8003bd66d00  syz-executor.2
17630     1   804     0  S       uwait   0xfffff8003bc76300  syz-executor.2
17621     1 17621     0  S       uwait   0xfffff80061fc4900  syz-executor.3
17619     1 17619     0  S       uwait   0xfffff80061fc4300  syz-executor.3
17610     1   851     0  S       uwait   0xfffff80065886b00  syz-executor.3
17606     1 17606     0  S       uwait   0xfffff800658d5500  syz-executor.3
17504     1   851     0  S       uwait   0xfffff80061fb5d00  syz-executor.3
17497     1   851     0  S       uwait   0xfffff8006575f300  syz-executor.3
17466 17463   782     0  SV      uwait   0xfffff80061fb5500  syz-executor.0
17463     1   782     0  DV      ppwait  0xfffff80065ad1a20  syz-executor.0
16147     1 16147     0  S       uwait   0xfffff80035496100  syz-executor.3
16145     1 16145     0  S       uwait   0xfffff800659a8900  syz-executor.3
16138     1 16138     0  S       uwait   0xfffff80065886900  syz-executor.3
16135     1 16135     0  S       uwait   0xfffff8003be13b00  syz-executor.3
15684     1   851     0  S       uwait   0xfffff80061fb5100  syz-executor.3
15683     1   851     0  S       uwait   0xfffff80061fb5f00  syz-executor.3
15682     1 15682     0  S       uwait   0xfffff80065886f00  syz-executor.3
15681     1   851     0  S       uwait   0xfffff80061fb5900  syz-executor.3
15642     1 15642     0  S       uwait   0xfffff8003bc76100  syz-executor.2
15638     1 15638     0  S       uwait   0xfffff800659a8d00  syz-executor.2
14569     1 14569     0  S       uwait   0xfffff80065886500  syz-executor.0
14560     1 14560     0  S       uwait   0xfffff8003bbcd500  syz-executor.0
14555     1 14555     0  S       uwait   0xfffff800611f6300  syz-executor.0
14389     1 14389     0  S       uwait   0xfffff800611f6100  syz-executor.3
14388     1 14388     0  S       uwait   0xfffff8003bd66100  syz-executor.3
14352     1   782     0  S       uwait   0xfffff80015d42500  syz-executor.0
14346     1 14346     0  S       uwait   0xfffff80035496900  syz-executor.0
12591     1   851     0  S       umtxn   0xfffff8003bbcd900  syz-executor.3
12590     1   851     0  S       uwait   0xfffff8003bd66700  syz-executor.3
12589     1   851     0  S       uwait   0xfffff800611f6700  syz-executor.3
12586     1   851     0  S       uwait   0xfffff80015dccb00  syz-executor.3
12305     1   851     0  S       uwait   0xfffff80035496b00  syz-executor.3
12304     1   851     0  S       uwait   0xfffff800611f6d00  syz-executor.3
12303     1   851     0  S       uwait   0xfffff80061fc4500  syz-executor.3
12302     1   851     0  S       umtxn   0xfffff800611f6900  syz-executor.3
11949     1   851     0  S       uwait   0xfffff8003bbcd700  syz-executor.3
11947     1   851     0  S       uwait   0xfffff800611f6f00  syz-executor.3
11943     1   851     0  S       uwait   0xfffff8003bc76900  syz-executor.3
11941     1   851     0  S       uwait   0xfffff8003be14d00  syz-executor.3
11931     1   783     0  S       uwait   0xfffff8003bc76500  syz-executor.1
11930     1   783     0  S       umtxn   0xfffff8003bc76700  syz-executor.1
11831     1   783     0  S       uwait   0xfffff80061fc4700  syz-executor.1
11827     1   783     0  S       uwait   0xfffff8003bbcd100  syz-executor.1
10103     1   804     0  S       uwait   0xfffff80061fc4f00  syz-executor.2
10102     1   804     0  S       uwait   0xfffff80035496d00  syz-executor.2
 9821     1   851     0  S       uwait   0xfffff80035496f00  syz-executor.3
 9818     1   851     0  S       uwait   0xfffff8003be14100  syz-executor.3
 9755     1   783     0  S       uwait   0xfffff80015d8a500  syz-executor.1
 9754     1   783     0  S       uwait   0xfffff8003bc76b00  syz-executor.1
 9753     1   783     0  S       uwait   0xfffff80015d8a100  syz-executor.1
 9662     1   783     0  S       uwait   0xfffff800611f6b00  syz-executor.1
 9661     1   783     0  S       uwait   0xfffff8003bc76d00  syz-executor.1
 9576     1   804     0  S       uwait   0xfffff80015d8a900  syz-executor.2
 9558     1   783     0  S       uwait   0xfffff80015d49500  syz-executor.1
 9556     1   783     0  S       uwait   0xfffff8003bccc500  syz-executor.1
 9555     1   783     0  S       uwait   0xfffff8003be14900  syz-executor.1
 9553     1   783     0  S       uwait   0xfffff80035496700  syz-executor.1
 7986     1  7986     0  S       uwait   0xfffff8003bbcdb00  syz-executor.3
 7984     1  7984     0  S       uwait   0xfffff8003bbcd300  syz-executor.3
 7841     1  7841     0  S       uwait   0xfffff80015d46100  syz-executor.1
 7839     1  7839     0  S       uwait   0xfffff80015d49d00  syz-executor.1
 7332     1   782     0  SV      uwait   0xfffff80015d44f00  syz-executor.0
 7323     1   782     0  SV      uwait   0xfffff8003be13900  syz-executor.0
 7318     1   782     0  SV      uwait   0xfffff80015d44900  syz-executor.0
 7290     1   783     0  SV      uwait   0xfffff8003bd66f00  syz-executor.1
 7289     1   804     0  SV      uwait   0xfffff8003bd66900  syz-executor.2
 7283     1   804     0  SV      uwait   0xfffff8003ba5ef00  syz-executor.2
 7279     1   783     0  SV      uwait   0xfffff8003be13500  syz-executor.1
 7273     1   804     0  SV      uwait   0xfffff80015dccf00  syz-executor.2
 7272     1   783     0  SV      uwait   0xfffff8003be13700  syz-executor.1
 7263     1   783     0  SV      uwait   0xfffff80015dcc300  syz-executor.1
 7262     1   804     0  SV      uwait   0xfffff8003be13f00  syz-executor.2
 7249     1   804     0  SV      uwait   0xfffff80015dcc500  syz-executor.2
 7241     1   804     0  SV      uwait   0xfffff8003bd66b00  syz-executor.2
 7234     1   804     0  SV      uwait   0xfffff8003be14300  syz-executor.2
 5675     1   851     0  SV      uwait   0xfffff80015dcc900  syz-executor.3
 5674     1   851     0  SV      uwait   0xfffff8003be13d00  syz-executor.3
 4183     1  4183    65  Ss      select  0xfffff8003bc7e440  dhclient
 3680     1  3680     0  Ss      select  0xfffff800354c7a40  dhclient
 3677     1  3677     0  Ss      select  0xfffff8003bc69740  dhclient
 3662     1  3662    65  Ss      select  0xfffff800354c72c0  dhclient
 3332     1  3332     0  Ss      select  0xfffff8003bb3c740  dhclient
 3329     1  3329     0  Ss      select  0xfffff8003bdeabc0  dhclient
 3305     1  3305    65  Ss      select  0xfffff80035124ec0  dhclient
 2902     1  2902     0  Ss      select  0xfffff8003b346740  dhclient
 2899     1  2899     0  Ss      select  0xfffff8003bcf3140  dhclient
 2880     1  2880    65  Ss      select  0xfffff800351248c0  dhclient
 1228     1  1228     0  Ss      select  0xfffff8003be0a140  dhclient
 1225     1  1225     0  Ss      select  0xfffff80015d91140  dhclient
  851   780   851     0  Ss      nanslp  0xffffffff8273c560  syz-executor.3
  804   780   804     0  Ss      nanslp  0xffffffff8273c561  syz-executor.2
  783   780   783     0  Rs                                  syz-executor.1
  782   780   782     0  Ss      nanslp  0xffffffff8273c560  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100115                   S       uwait   0xfffff80015d46f00  syz-fuzzer
100116                   S       uwait   0xfffff80015d53300  syz-fuzzer
100117                   S       kqread  0xfffff80015d53500  syz-fuzzer
100118                   S       uwait   0xfffff8003ba5e700  syz-fuzzer
100119                   S       uwait   0xfffff8003ba5e900  syz-fuzzer
100120                   S       uwait   0xfffff80015d49f00  syz-fuzzer
100121                   S       uwait   0xfffff8003ba5eb00  syz-fuzzer
100122                   S       uwait   0xfffff8003ba5ed00  syz-fuzzer
100318                   S       uwait   0xfffff8003bd66300  syz-fuzzer
107857                   S       uwait   0xfffff8003ba5e100  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffff80015db0b20  csh
  776   694   776     0  Ss      select  0xfffff8003b4bd740  sshd
  760     1   760     0  Ss+     ttyin   0xfffff80015465cb0  getty
  759     1   759     0  Ss+     ttyin   0xfffff80015aff4b0  getty
  758     1   758     0  Ss+     ttyin   0xfffff80015affcb0  getty
  757     1   757     0  Ss+     ttyin   0xfffff80015a874b0  getty
  756     1   756     0  Ss+     ttyin   0xfffff80015a87cb0  getty
  755     1   755     0  Ss+     ttyin   0xfffff80015a8b4b0  getty
  754     1   754     0  Ss+     ttyin   0xfffff80015a8bcb0  getty
  753     1   753     0  Ss+     ttyin   0xfffff80015a8e4b0  getty
  752     1   752     0  Ss+     ttyin   0xfffff80015a8ecb0  getty
  698     1   698     0  Ss      nanslp  0xffffffff8273c561  cron
  694     1   694     0  Ss      select  0xfffff80015d89d40  sshd
  507     1   507     0  Ss      select  0xfffff8003b2b68c0  syslogd
  436     1   436     0  Ss      select  0xfffff80015d455c0  devd
  435     1   435    65  Ss      select  0xfffff80015d48740  dhclient
  350     1   350     0  Ss      select  0xfffff80015d48d40  dhclient
  347     1   347     0  Ss      select  0xfffff80015d485c0  dhclient
   23     0     0     0  DL      vlruwt  0xfffff80015ca4538  [vnlru]
   22     0     0     0  DL      syncer  0xffffffff8282b9d0  [syncer]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100081                   D       qsleep  0xffffffff8282aa80  [bufdaemon]
100086                   D       -       0xffffffff8220ae80  [bufspacedaemon-0]
100096                   D       sdflush 0xfffff80004dfc4e8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff828528c8  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100079                   D       psleep  0xffffffff82846d38  [dom0]
100087                   D       launds  0xffffffff82846d44  [laundry: dom0]
100088                   D       umarcl  0xffffffff815cb6d0  [uma]
   18     0     0     0  DL      -       0xffffffff82570908  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff830e0828  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff82f383c0  [pf purge]
   15     0     0     0  DL      -       0xffffffff828280dc  [soaiod4]
    9     0     0     0  DL      -       0xffffffff828280dc  [soaiod3]
    8     0     0     0  DL      -       0xffffffff828280dc  [soaiod2]
    7     0     0     0  DL      -       0xffffffff828280dc  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100044                   D       -       0xffffffff82447dc0  [doneq0]
100045                   D       -       0xffffffff82447d40  [async]
100078                   D       -       0xffffffff82447c10  [scanner]
   14     0     0     0  DL      seqstat 0xfffff80004dcbc88  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffff80004d99d80  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff80004d99d30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff82844220  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100035                   D       -       0xffffffff8271bda0  [g_event]
100036                   D       -       0xffffffff8271bda8  [g_up]
100037                   D       -       0xffffffff8271bdb0  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100028                   D       -       0xfffff80004c39d00  [thr_0]
100029                   D       -       0xfffff80004c39d80  [thr_1]
   12     0     0     0  RL      (threaded)                  [intr]
100012                   I                                   [swi5: fast taskq]
100015                   I                                   [swi6: task queue]
100017                   I                                   [swi6: Giant taskq]
100030                   I                                   [swi4: clock (0)]
100031                   I                                   [swi4: clock (1)]
100032                   Run     CPU 1                       [swi1: netisr 0]
100033                   I                                   [swi3: vm]
100046                   I                                   [irq24: virtio_pci0]
100047                   I                                   [irq25: virtio_pci0]
100048                   I                                   [irq26: virtio_pci0]
100049                   I                                   [irq27: virtio_pci0]
100050                   I                                   [irq28: virtio_pci1]
100051                   I                                   [irq29: virtio_pci1]
100052                   I                                   [irq30: virtio_pci1]
100053                   I                                   [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq10: virtio_pci2]
100061                   I                                   [irq1: atkbd0]
100062                   I                                   [irq12: psm0]
100063                   I                                   [swi0: uart uart++]
100071                   I                                   [swi1: pf send]
100084                   Run     CPU 0                       [swi1: hpts]
100085                   I                                   [swi1: hpts]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff80004bc7538  [init]
   10     0     0     0  DL      audit_w 0xffffffff82844730  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8271c330  [swapper]
100005                   D       -       0xfffff80004c63d00  [if_config_tqg_0]
100006                   D       -       0xfffff80004c63900  [softirq_0]
100007                   D       -       0xfffff80004c63500  [softirq_1]
100008                   D       -       0xfffff80004c63100  [if_io_tqg_0]
100009                   D       -       0xfffff80004c61d00  [if_io_tqg_1]
100010                   D       -       0xfffff80004c5fd00  [in6m_free taskq]
100011                   D       -       0xfffff80004c5f900  [aiod_kick taskq]
100013                   D       -       0xfffff80004c5f100  [kqueue_ctx taskq]
100014                   D       -       0xfffff80004c58d00  [pci_hp taskq]
100016                   D       -       0xfffff80004c58500  [inm_free taskq]
100018                   D       -       0xfffff80004c53d00  [linuxkpi_irq_wq]
100019                   D       -       0xfffff80004c53900  [thread taskq]
100020                   D       -       0xfffff80004c53500  [linuxkpi_short_wq_0]
100021                   D       -       0xfffff80004c53500  [linuxkpi_short_wq_1]
100022                   D       -       0xfffff80004c53500  [linuxkpi_short_wq_2]
100023                   D       -       0xfffff80004c53500  [linuxkpi_short_wq_3]
100024                   D       -       0xfffff80004c53100  [linuxkpi_long_wq_0]
100025                   D       -       0xfffff80004c53100  [linuxkpi_long_wq_1]
100026                   D       -       0xfffff80004c53100  [linuxkpi_long_wq_2]
100027                   D       -       0xfffff80004c53100  [linuxkpi_long_wq_3]
100034                   D       -       0xfffff80004c39900  [firmware taskq]
100038                   D       -       0xfffff80004c39500  [crypto_0]
100039                   D       -       0xfffff80004c39500  [crypto_1]
100055                   D       -       0xfffff800153dc900  [vtnet0 rxq 0]
100056                   D       -       0xfffff800153dc500  [vtnet0 txq 0]
100057                   D       -       0xfffff800153dc100  [vtnet0 rxq 1]
100058                   D       -       0xfffff800153c6d00  [vtnet0 txq 1]
100060                   D       vtbslp  0xfffff80015429500  [virtio_balloon]
100064                   D       -       0xfffff800153c6900  [mca taskq]
100066                   D       -       0xffffffff81e20450  [deadlkres]
100074                   D       -       0xfffff80015a1a900  [acpi_task_0]
100075                   D       -       0xfffff80015a1a900  [acpi_task_1]
100076                   D       -       0xfffff80015a1a900  [acpi_task_2]
100077                   D       -       0xfffff80004c39100  [CAM taskq]
db> show all locks
Process 18331 (syz-executor.2) thread 0xfffffe009c862000 (120572)
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00041b2390) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_pcb.c:2402
Process 783 (syz-executor.1) thread 0xfffffe0094f7eac0 (100106)
shared rw vm object (vm object) r = 0 (0xfffff80065ca7b58) locked @ /syzkaller/managers/i386/kernel/sys/vm/vm_fault.c:1332
shared sx vm map (user) (vm map (user)) r = 0 (0xfffffe0094fd1a50) locked @ /syzkaller/managers/i386/kernel/sys/vm/vm_map.c:4935
Process 12 (intr) thread 0xfffffe00042bd020 (100032)
exclusive sleep mutex so_snd (so_snd) r = 0 (0xfffff80065ad4610) locked @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/../../../netinet/tcp_stacks/rack.c:10625
exclusive rw tcpinp (tcpinp) r = 0 (0xfffff80061fddb90) locked @ /syzkaller/managers/i386/kernel/sys/netinet/in_pcb.c:2524
Process 12 (intr) thread 0xfffffe0055374000 (100084)
exclusive rw lle (lle) r = 0 (0xfffff80061aca2f8) locked @ /syzkaller/managers/i386/kernel/sys/netinet/in.c:1585
exclusive rw tcpinp (tcpinp) r = 0 (0xfffff80061ec7208) locked @ /syzkaller/managers/i386/kernel/sys/netinet/tcp_hpts.c:1536
db> show malloc
              Type        InUse        MemUse     Requests
         sysctloid        34288        12858K        34355
           pf_hash            5        11560K            5
            devbuf         4216         6982K         4244
           pf_rule         1003         4012K         2195
          tcp_hpts            5         3219K            5
          filedesc          190         3060K        34675
              kobj          328         2624K          488
             vtbuf           24         2064K           46
           subproc          312         1355K        18503
          vfscache            3         1035K            3
            newblk            5         1034K        17843
               pcb          102          914K        18676
            acpica         1674          649K        55230
          inodedep           66          585K        17387
            linker          368          539K          467
           callout            2          528K            2
         ufs_quota            1          520K            1
          vfs_hash            1          520K            1
              intr            4          480K            4
               bus          990          378K         3499
               BPF           46          337K           46
           kdtrace          389          296K        38909
              umtx          506          222K          506
            DEVFS1          107          214K          124
            module          513          193K          513
         vnet_data            1          176K            1
           tidhash            3          164K            3
           pagedep            9          140K        17264
        tfo_ccache            1          136K            1
               sem            4          120K            4
          routetbl          192          116K         3169
               UMA          270          102K          270
     audit_evclass          236           89K          294
              temp           37           85K         8165
          mtx_pool            2           80K            2
          syncache            1           76K            1
              vmem            3           72K            5
               msg            4           68K            4
            ifaddr           71           67K           73
            kqueue          151           65K        18377
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            DEVFS3          126           63K          136
          pf_table           15           60K          687
       ether_multi          157           59K          167
        gtaskqueue           18           57K           18
           pwddesc          149           56K        18333
        DEVFS_RULE           56           54K           56
              kenv           95           52K           95
      eventhandler          133           50K          133
         sctp_atcl           47           47K         9307
           ithread           99           43K           99
           pf_osfp          111           42K          111
              rman           84           42K          425
            KTRACE          100           38K          100
           lltable           42           36K          103
         taskqueue           60           36K           60
              proc            3           34K            3
         ufs_mount            5           34K            6
            bus-sc           33           34K         1710
         sctp_timw           66           33K           66
           devstat            4           33K            4
            DEVFSP           87           33K          524
              ksem           20           33K         3260
         hostcache            1           32K            1
               tty           16           32K           16
               shm            1           32K           16
         in6_multi           71           31K           71
            dirrem           57           29K        17270
              GEOM           60           29K          489
       inpcbpolicy           75           29K        10953
            kbdmux            6           28K            6
              cred           27           27K          277
         sctp_stro           13           26K         2291
             ifnet            7           25K            7
            plimit           24           24K          464
          kcovinfo           64           24K           68
         sctp_atky           60           23K        11859
         CAM queue            5           21K         1528
          freefile           55           21K        17217
             selfd           55           21K       243025
         pfs_nodes           20           20K           20
         proc-args           52           20K          701
         sctp_athm           47           18K         9419
              UART           12           18K           12
           session           35           18K           55
         bmsafemap            2           17K        17347
               rpc            2           16K            2
             shmfd            1           16K           45
       pfs_vncache            1           16K            1
       ufs_dirhash           24           14K           24
               osd           36           14K         9115
            sglist            5           13K            5
               MCA           32           12K           32
           CAM DEV            3           12K          510
             lockf           32           12K           60
                vt           11           11K           11
          pf_ifnet           14           11K          744
           acpisem           28           11K           28
           CAM XPT           22           11K          543
            Unitno           27           11K           51
          sctp_map           26           10K         4580
           tcp_fsb           26           10K         2409
           uidinfo            3            9K           14
           memdesc            1            8K            1
         ipsec-saq            2            8K            2
             evdev            4            8K            4
           acpidev           20            8K           20
             hhook           15            8K           17
            select           19            8K          113
             mount           16            7K          108
       fpukern_ctx            3            6K            3
          terminal           11            6K           11
          sctp_ifa           14            6K           15
            ip6ndp           12            6K           15
       ipsecpolicy            2            5K            2
 encap_export_host           12            5K           12
             clone            9            5K            9
        local_apic            1            4K            1
           io_apic            1            4K            1
            sahead            1            4K            1
          secasvar            1            4K            1
             nhops            6            4K            8
          pci_link           10            4K           10
               msi            9            4K            9
             DEVFS            9            4K           10
             xform            9            4K          518
               tun            7            4K            7
             ipsec            3            3K            3
             mkdir            8            3K        34478
          in_multi            6            3K            8
          nexusdev            7            3K            7
            feeder            7            3K            7
          procdesc            5            3K           18
          freework            5            3K        17202
          sctp_ifn            6            3K           15
               mld            6            3K            6
              igmp            6            3K            6
         toponodes            6            3K            6
            prison            6            3K            6
            isadev            6            3K            6
           softdep            1            2K            1
          freeblks            4            2K        17201
       vnodemarker            2            2K          104
      NFSD session            1            2K            1
             linux            5            2K            6
        CAM periph            4            2K          271
          filecaps            5            2K          118
            crypto            4            2K            4
         newdirblk            4            2K        17239
            diradd            4            2K        17310
              pfil            4            2K            4
          CAM path            4            2K         1034
            soname            4            2K        23577
           tcpfunc            3            2K            3
        loginclass            3            2K            6
         sctp_stri            1            1K          680
    chacha20random            1            1K            1
            vnodes            1            1K            1
           CAM SIM            2            1K            2
              ktls            1            1K            1
              cdev            2            1K            2
        aesni_data            2            1K            2
              cpus            2            1K            2
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
           entropy            2            1K           47
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
          pmchooks            1            1K            1
          sctp_vrf            1            1K            1
            apmdev            1            1K            1
 CAM I/O Scheduler            1            1K            1
    vnet_data_free            1            1K            1
              vnet            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
          acpiintr            1            1K            1
               pmc            1            1K            1
        ext2_mount            0            0K            0
         ext2_node            0            0K            0
      ext2_extents            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K         5340
         sctp_iter            0            0K          114
         sctp_mvrf            0            0K            0
         sctp_cpal            0            0K          104
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
         sctp_a_it            0            0K           10
         sctp_aadr            0            0K           61
           pf_altq            0            0K            0
           pf_temp            0            0K            0
          cdg data            0            0K           75
          chd data            0            0K           36
        cubic data            0            0K           78
        dctcp data            0            0K           19
            tcp_do            0            0K            0
         htcp data            0            0K           17
        vegas data            0            0K           46
            mqdata            0            0K            0
       NFSD V4lock            0            0K            0
        madt_table            0            0K            2
          smartpqi            0            0K            0
      NFSD V4state            0            0K            0
     NFSD srvcache            0            0K            0
       msdosfs_fat            0            0K            0
     msdosfs_mount            0            0K            0
      msdosfs_node            0            0K            0
              iavf            0            0K            0
               ixl            0            0K            0
            DEVFS4            0            0K            0
            DEVFS2            0            0K            0
            gntdev            0            0K            0
       privcmd_dev            0            0K            0
        ice-resmgr            0            0K            0
         ice-osdep            0            0K            0
               ice            0            0K            0
             axgbe            0            0K            0
        evtchn_dev            0            0K            0
          xenstore            0            0K            0
         ciss_data            0            0K            0
         BACKLIGHT            0            0K            0
               xnb            0            0K            0
              xbbd            0            0K            0
               xbd            0            0K            0
           Balloon            0            0K            0
          sysmouse            0            0K            0
            vtfont            0            0K            0
          xen_intr            0            0K            0
           xen_hvm            0            0K            0
         legacydrv            0            0K            0
            qpidrv            0            0K            0
           ath_hal            0            0K            0
            athdev            0            0K            0
      dmar_idpgtbl            0            0K            0
          dmar_dom            0            0K            0
          dmar_ctx            0            0K            0
           ata_pci            0            0K            0
           ata_dma            0            0K            0
       ata_generic            0            0K            0
              isci            0            0K            0
      iommu_dmamap            0            0K            0
               amr            0            0K            0
     hyperv_socket            0            0K            0
           bxe_ilt            0            0K            0
            xenbus            0            0K            0
            pvscsi            0            0K            0
           scsi_da            0            0K           69
     vm_fictitious            0            0K            0
            ata_da            0            0K            0
           scsi_ch            0            0K            0
           scsi_cd            0            0K            0
       AHCI driver            0            0K            0
            USBdev            0            0K            0
               USB            0            0K            0
               agp            0            0K            0
           nvme_da            0            0K            0
           UMAHash            0            0K            0
           acpipwr            0            0K            0
         acpi_perf            0            0K            0
         vm_pgdata            0            0K            0
           jblocks            0            0K            0
          savedino            0            0K         9154
          sentinel            0            0K            0
            jfsync            0            0K            0
            jtrunc            0            0K            0
             sbdep            0            0K           49
           jsegdep            0            0K            0
              jseg            0            0K            0
         jfreefrag            0            0K            0
          jfreeblk            0            0K            0
           jnewblk            0            0K            0
            jmvref            0            0K            0
           jremref            0            0K            0
           jaddref            0            0K            0
           freedep            0            0K            0
          freefrag            0            0K            6
        allocindir            0            0K            0
          indirdep            0            0K           24
       allocdirect            0            0K            0
          ufs_trim            0            0K            0
           mactemp            0            0K            0
     audit_trigger            0            0K            0
 audit_pipe_presel            0            0K            0
     audit_pipeent            0            0K            0
        audit_pipe            0            0K            0
      audit_evname            0            0K            0
         audit_bsm            0            0K            0
      audit_gidset            0            0K            0
        audit_text            0            0K            0
        audit_path            0            0K            0
        audit_data            0            0K            0
        audit_cred            0            0K            0
            twsbuf            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
         MLX5E_TLS            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
            MLX5EN            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
          MLX5DUMP            0            0K            0
        MLX5EEPROM            0            0K            0
        MLX5EEPROM            0            0K            0
          seq_file            0            0K            0
             radix            0            0K            0
               idr            0            0K            0
            lkpifw            0            0K            0
               NLM            0            0K            0
    ipsec-spdcache            0            0K            0
         ipsec-reg            0            0K            0
        ipsec-misc            0            0K            0
      ipsecrequest            0            0K            0
            ip6opt            0            0K           44
       ip6_msource            0            0K            0
      ip6_moptions            0            0K            0
       in6_mfilter            0            0K            0
             frag6            0            0K            0
            tcplog            0            0K            0
        tcp_hwpace            0            0K            0
      twe_commands            0            0K            0
               LRO            0            0K            0
      newreno data            0            0K            0
        ip_msource            0            0K            0
       ip_moptions            0            0K            2
        in_mfilter            0            0K            0
              ipid            0            0K            0
         80211scan            0            0K            0
      80211ratectl            0            0K            0
        80211power            0            0K            0
       80211nodeie            0            0K            0
         80211node            0            0K            0
      80211mesh_gt            0            0K            0
      80211mesh_rt            0            0K            0
         80211perr            0            0K            0
         80211prep            0            0K            0
         80211preq            0            0K            0
          80211dfs            0            0K            0
       80211crypto            0            0K            0
          80211vap            0            0K            0
             iflib            0            0K            0
              vlan            0            0K            0
               gif            0            0K            0
           ifdescr            0            0K            0
              zlib            0            0K            0
           fadvise            0            0K            0
           VN POLL            0            0K            0
      twa_commands            0            0K            0
            statfs            0            0K        17471
     namei_tracker            0            0K            8
       export_host            0            0K            0
        cl_savebuf            0            0K            4
       tcp_log_dev            0            0K         1972
      midi buffers            0            0K            0
             mixer            0            0K            0
              ac97            0            0K            0
             hdacc            0            0K            0
              hdac            0            0K            0
              hdaa            0            0K            0
         acpicmbat            0            0K            0
       SIIS driver            0            0K            0
           CAM CCB            0            0K         2924
               PUC            0            0K            0
          ppbusdev            0            0K            0
agtiapi_MemAlloc malloc            0            0K            0
    osti_cacheable            0            0K            0
          tempbuff            0            0K            0
            biobuf            0            0K            0
              aios            0            0K            0
               lio            0            0K            0
               acl            0            0K            0
          tempbuff            0            0K            0
          mbuf_tag            0            0K          139
ag_tgt_map_t malloc            0            0K            0
ag_slr_map_t malloc            0            0K            0
lDevFlags * malloc            0            0K            0
tiDeviceHandle_t * malloc            0            0K            0
ag_portal_data_t malloc            0            0K            0
ag_device_t malloc            0            0K            0
     STLock malloc            0            0K            0
          CCB List            0            0K            0
            sr_iov            0            0K            0
               OCS            0            0K            0
               OCS            0            0K            0
              nvme            0            0K            0
               nvd            0            0K            0
            netmap            0            0K            0
            mwldev            0            0K            0
        MVS driver            0            0K            0
     CAM ccb queue            0            0K            0
          mrsasbuf            0            0K            0
          mpt_user            0            0K            0
          mps_user            0            0K            0
              accf            0            0K            0
               pts            0            0K            0
               iov            0            0K        24051
          ioctlops            0            0K         5248
           eventfd            0            0K            0
           Witness            0            0K            0
             stack            0            0K            0
            MPSSAS            0            0K            0
               mps            0            0K            0
          mpr_user            0            0K            0
            MPRSAS            0            0K            0
               mpr            0            0K            0
            mfibuf            0            0K            0
              sbuf            0            0K          288
        md_sectors            0            0K            0
          firmware            0            0K            0
        compressor            0            0K            0
           md_disk            0            0K            0
              SWAP            0            0K            0
           malodev            0            0K            0
               LED            0            0K            0
         sysctltmp            0            0K          807
            sysctl            0            0K            3
              ekcd            0            0K            0
            dumper            0            0K            0
          sendfile            0            0K            0
              rctl            0            0K            0
          ix_sriov            0            0K            0
        aacraidcam            0            0K            0
       aacraid_buf            0            0K            0
                ix            0            0K            0
            ipsbuf            0            0K            0
             cache            0            0K            0
            iirbuf            0            0K            0
      prison_racct            0            0K            0
       Fail Points            0            0K            0
             sigio            0            0K            3
filedesc_to_leader            0            0K            0
               pwd            0            0K            0
       tty console            0            0K            0
            aaccam            0            0K            0
            aacbuf            0            0K            0
              zstd            0            0K            0
            XZ_DEC            0            0K            0
            nvlist            0            0K            0
          SCSI ENC            0            0K            0
           SCSI sa            0            0K            0
         scsi_pass            0            0K            0
        isofs_node            0            0K            0
       isofs_mount            0            0K            0
     tr_raid5_data            0            0K            0
    tr_raid1e_data            0            0K            0
     tr_raid1_data            0            0K            0
     tr_raid0_data            0            0K            0
    tr_concat_data            0            0K            0
       md_sii_data            0            0K            0
   md_promise_data            0            0K            0
    md_nvidia_data            0            0K            0
   md_jmicron_data            0            0K            0
     md_intel_data            0            0K            0
       md_ddf_data            0            0K            0
         raid_data            0            0K           72
     geom_flashmap            0            0K            0
         tmpfs dir            0            0K            0
        tmpfs name            0            0K            0
       tmpfs mount            0            0K            0
           NFS FHA            0            0K            0
         newnfsmnt            0            0K            0
  newnfsclient_req            0            0K            0
   NFSCL layrecall            0            0K            0
     NFSCL session            0            0K            0
     NFSCL sockreq            0            0K            0
     NFSCL devinfo            0            0K            0
     NFSCL flayout            0            0K            0
      NFSCL layout            0            0K            0
     NFSD rollback            0            0K            0
      NFSCL diroff            0            0K            0
       NEWdirectio            0            0K            0
        NEWNFSnode            0            0K            0
         NFSCL lck            0            0K            0
      NFSCL lckown            0            0K            0
      NFSCL client            0            0K            0
       NFSCL deleg            0            0K            0
        NFSCL open            0            0K            0
       NFSCL owner            0            0K            0
            NFS fh            0            0K            0
           NFS req            0            0K            0
     NFSD usrgroup            0            0K            0
       NFSD string            0            0K            0
db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
           tcp_log    416  115032   15108      338404       0     254   54138240        0
   mbuf_jumbo_page   4096    8320     943      871649       0     254   37941248        0
        malloc-384    384   34888     422       75580       0      30   13559040        0
       malloc-1024   1024    4155      13        4507       0      16    4268032        0
       malloc-4096   4096    1015       6        3712       0       2    4182016        0
      malloc-32768  32768      98       4       17484       0       1    3342336        0
       malloc-8192   8192     329       3        2763       0       1    2719744        0
              pbuf   2624       0     973           0       0       2    2553152        0
              mbuf    256    8907     963     3412403       0     254    2526720        0
       malloc-1024   1024     162    1986       18900       0      16    2199552        0
          BUF TRIE    144     207   13261        1215       0      62    1939392        0
        RADIX NODE    144   12302     183      431124       0      62    1797840        0
       UMA Slabs 0    112   14475      30       14475       0     126    1624560        0
        malloc-384    384    2163    1997      183045       0      30    1597440        0
       malloc-8192   8192     159       5       18358       0       1    1343488        0
      mbuf_cluster   2048     615       1         615       0     254    1261568        0
        malloc-512    512     123    2045       52594       0      30    1110016        0
       malloc-8192   8192      36      96        6423       0       1    1081344        0
       malloc-1024   1024       2     874        9165       0      16     897024        0
        256 Bucket   2048     223     131       36466       0       8     724992        0
        malloc-384    384    1744      96       62785       0      30     706560        0
         FFS inode   1160     569      26       17786       0       8     690200        0
         VM OBJECT    264    2440      50      260822       0      30     657360        0
         MAP ENTRY     96    6142     284      985464       0     126     616896        0
       tcp_bbr_map    128       0    4495      233831       0     127     575360        0
    ertt_txseginfo     40       0   11817     1618080       0     254     472680        0
            THREAD   1808     239      14       20575       0       8     457424        0
      malloc-16384  16384      26       0          30       0       1     425984        0
       malloc-1024   1024     255     157       10954       0      16     421888        0
        malloc-384    384    1037      53        6222       0      30     418560        0
            lkpimm    160       1    2324           1       0      62     372000        0
          lkpicurr    160       2    2323           2       0      62     372000        0
       malloc-1024   1024     303      33       23188       0      16     344064        0
           VMSPACE   2544     123       9       18296       0       4     335808        0
         sctp_asoc   2288      13     122        2290       0     254     308880        0
             VNODE    448     607      68       17826       0      30     302400        0
         tcp_inpcb    488      33     543        9103       0     254     281088        0
        malloc-384    384     680      20         986       0      30     268800        0
      malloc-65536  65536       0       4           8       0       1     262144        0
      malloc-65536  65536       4       0           4       0       1     262144        0
       malloc-2048   2048      22      96        2807       0       8     241664        0
      malloc-16384  16384      10       4         273       0       1     229376        0
            socket    944     123     117       18877       0     254     226560        0
       malloc-2048   2048     107       3         124       0       8     225280        0
            DEVCTL   1024       0     216         132       0       0     221184        0
       malloc-4096   4096      17      37        3614       0       2     221184        0
              PROC   1336     148      14       18332       0       8     216432        0
        sctp_raddr    736      18     268        4718       0     254     210496        0
        malloc-512    512     383       9        1993       0      30     200704        0
      malloc-65536  65536       1       2         178       0       1     196608        0
           sctp_ep   1280      34     116        6421       0     254     192000        0
        malloc-512    512     201     167        2720       0      30     188416        0
         UMA Zones    768     242       2         242       0      16     187392        0
         vmem btag     56    3163      65        3163       0     254     180768        0
       malloc-1024   1024      65     111        6453       0      16     180224        0
         filedesc0   1072     149      19       18333       0       8     180096        0
       malloc-8192   8192      16       4         186       0       1     163840        0
       mbuf_packet    256      28     587       53137       0     254     157440        0
       FFS2 dinode    256     569      16       17786       0      62     149760        0
       S VFS Cache    104    1045     359       19755       0     126     146016        0
             tcpcb   1064      32     101        9103       0     254     141512        0
        malloc-384    384     273      77      261217       0      30     134400        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-32768  32768       4       0           4       0       1     131072        0
            pcpu-8      8   12993    2879       36101       0     254     126976        0
          ksiginfo    112     144     900        1731       0     126     116928        0
      malloc-16384  16384       7       0           7       0       1     114688        0
        malloc-384    384     206      34       10147       0      30      92160        0
        malloc-512    512     123      53       19041       0      30      90112        0
          UMA Kegs    384     227       6         227       0      30      89472        0
        128 Bucket   1024      34      49        2279       0      16      84992        0
            clpbuf   2624       0      32          22       0      16      83968        0
         32 Bucket    256     231      84       23899       0      62      80640        0
             g_bio    408       0     190        9161       0      30      77520        0
        malloc-512    512      97      39        3063       0      30      69632        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       0       1           1       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
       malloc-8192   8192       2       5       17478       0       1      57344        0
       malloc-1024   1024      53       3          57       0      16      57344        0
         16 Bucket    144     249     143        3960       0      62      56448        0
      tcp_rack_pcb    832      26      37        2409       0      16      52416        0
        malloc-384    384      58      72        9161       0      30      49920        0
      malloc-16384  16384       3       0           3       0       1      49152        0
       malloc-8192   8192       4       2         534       0       1      49152        0
       malloc-4096   4096       5       7         563       0       2      49152        0
       malloc-4096   4096      10       2         527       0       2      49152        0
       malloc-2048   2048       9      15        1611       0       8      49152        0
       malloc-2048   2048      18       6          22       0       8      49152        0
             Files     80     360     240       56156       0     126      48000        0
         64 Bucket    512      50      38       13003       0      30      45056        0
           DIRHASH   1024      34       6          34       0      16      40960        0
       malloc-4096   4096       8       2         201       0       2      40960        0
        sctp_chunk    152      18     242        2896       0     254      39520        0
         TURNSTILE    136     254      19         254       0      62      37128        0
             NAMEI   1024       0      36       92908       0      16      36864        0
        malloc-512    512      19      53       17802       0      30      36864        0
        malloc-512    512      21      51       19400       0      30      36864        0
      malloc-16384  16384       1       1           5       0       1      32768        0
      malloc-16384  16384       2       0           2       0       1      32768        0
           pcpu-64     64     489      23         489       0     254      32768        0
       tcp_bbr_pcb    832       0      36        3279       0      16      29952        0
              pipe    744      25      15         736       0      16      29760        0
       malloc-4096   4096       7       0           7       0       2      28672        0
        malloc-512    512      33      23        1467       0      30      28672        0
             KNOTE    160      28     147      340427       0      62      28000        0
        SLEEPQUEUE     88     254      34         254       0     126      25344        0
       malloc-4096   4096       1       5         281       0       2      24576        0
               PWD     32      68     688       17336       0     254      24192        0
            ttyinq    160     135      15         300       0      62      24000        0
          8 Bucket     80      64     236        3983       0     126      24000        0
     udplite_inpcb    488      28      20        1069       0     254      23424        0
           ttyoutq    256      72      18         160       0      62      23040        0
       malloc-2048   2048       9       1           9       0       8      20480        0
       malloc-2048   2048       9       1           9       0       8      20480        0
          2 Bucket     32     136     494        5489       0     254      20160        0
             ripcb    488       8      32         479       0     254      19520        0
       Mountpoints   2752       2       5           2       0       4      19264        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-2048   2048       4       4          13       0       8      16384        0
      tcp_rack_map    112      57      87        4546       0     126      16128        0
              ertt     72      32     192        9103       0     126      16128        0
      vtnet_tx_hdr     24       0     668     2011415       0     254      16032        0
             unpcb    256      21      39        1450       0     254      15360        0
         udp_inpcb    488       6      18         302       0     254      11712        0
              kenv    258      15      30        1060       0      30      11610        0
       malloc-4096   4096       0       2        2191       0       2       8192        0
       malloc-2048   2048       0       4           9       0       8       8192        0
       malloc-1024   1024       0       8         221       0      16       8192        0
           pf tags    104      27      51          48       0     126       8112        0
           rtentry    176      31      15          35       0      62       8096        0
              PGRP     88      61      31          95       0     126       8096        0
          rl_entry     40      72     130          72       0     254       8080        0
   sctp_asconf_ack     48       0     168          57       0     254       8064        0
sctp_stream_msg_out    112       5      67         717       0     254       8064        0
        sctp_laddr     48       4     164         213       0     254       8064        0
             udpcb     32      33     219        1371       0     254       8064        0
               ipq     56       0     144           2       0     254       8064        0
          4 Bucket     48       6     162         404       0     254       8064        0
       UMA Slabs 1    176      30      15          30       0      62       7920        0
        sctp_readq    152       0      52         624       0     254       7904        0
     routing nhops    256      27       3          35       0      62       7680        0
     FPU_save_area    832       1       8           1       0      16       7488        0
            cpuset    104       7      55          18       0     126       6448        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
    tcp_log_bucket    176       0      23           2       0      62       4048        0
         hostcache     64       1      62           1       0     254       4032        0
          syncache    168       0      24           4       0     254       4032        0
      tcp_log_node    120       0      33           3       0     126       3960        0
            itimer    352       0      11          17       0      30       3872        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      15      24          16       0       0       3744        0
              vmem   1856       1       1           1       0       8       3712        0
         domainset     40       0      63           9       0     254       2520        0
           SMR CPU     32       3      60           3       0     254       2016        0
        SMR SHARED     24       3      60           3       0     254       1512        0
       FFS1 dinode    128       0       0           0       0     126          0        0
            da_ccb    544       0       0           0       0      16          0        0
           ada_ccb    272       0       0           0       0      30          0        0
             swblk    136       0       0           0       0      62          0        0
          swpctrie    144       0       0           0       0      62          0        0
       sctp_asconf     40       0       0           0       0     254          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    248       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0      62          0        0
pf table entry counters     64       0       0           0       0     254          0        0
   pf source nodes    136       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    304       0       0           0       0       0          0        0
          pf mtags     48       0       0           0       0     254          0        0
          tcpreass     48       0       0           0       0     254          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
             tcptw     88       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
            AIOLIO    272       0       0           0       0      30          0        0
             AIOCB    552       0       0           0       0      16          0        0
              AIOP     32       0       0           0       0     254          0        0
               AIO    208       0       0           0       0      62          0        0
           NCLNODE    584       0       0           0       0      16          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    224       0       0           0       0      62          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
           cryptop    280       0       0           0       0      30          0        0
  linux_dma_object     24       0       0           0       0     254          0        0
  linux_dma_pctrie    144       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
      ktls_session    192       0       0           0       0      62          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
            vnpbuf   2624       0       0           0       0      64          0        0
            mdpbuf   2624       0       0           0       0       3          0        0
           nfspbuf   2624       0       0           0       0      16          0        0
            swwbuf   2624       0       0           0       0       8          0        0
            swrbuf   2624       0       0           0       0      16          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    144       0       0           0       0      62          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-32768  32768       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-8192   8192       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-256    256       0       0           0       0      62          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
        malloc-128    128       0       0           0       0     126          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-64     64       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-32     32       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          0        0
         malloc-16     16       0       0           0       0     254          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 (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-freebsd-i386 2021/05/22 00:21 freebsd-src af949c590bd8 3c7fef33 console log report panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/..
ci-freebsd-i386 2021/05/21 15:17 freebsd-src af949c590bd8 3c7fef33 console log report panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/..
ci-freebsd-i386 2021/05/21 15:04 freebsd-src af949c590bd8 3c7fef33 console log report panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/..
ci-freebsd-i386 2021/05/21 14:51 freebsd-src af949c590bd8 3c7fef33 console log report panic: _mtx_lock_sleep: recursed on non-recursive mutex so_snd @ /syzkaller/managers/i386/kernel/sys/modules/tcp/rack/..
* Struck through repros no longer work on HEAD.