syzbot


Fatal trap NUM: page fault in tcp_sack_output

Status: fixed on 2022/06/08 16:07
Reported-by: syzbot+06d93ed4e0039768ba80@syzkaller.appspotmail.com
Fix commit: ce2525c8108a tcp: remove goto and address another NULL deref in SACK
First crash: 244d, last: 243d

Sample crash report:
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address	= 0x0
fault code		= supervisor read data, page not present
instruction pointer	= 0x20:0xffffffff81add5e9
stack pointer	        = 0x28:0xfffffe005405aa00
frame pointer	        = 0x28:0xfffffe005405aa30
code segment		= base 0x0, limit 0xfffff, type 0x1b
			= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags	= interrupt enabled, resume, IOPL = 0
current process		= 12 (irq31: virtio_pci1)
trap number		= 12
panic: page fault
cpuid = 0
time = 1654699616
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe005405a1f0
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe005405a350
vpanic() at vpanic+0x254/frame 0xfffffe005405a430
panic() at panic+0xb5/frame 0xfffffe005405a4f0
trap_fatal() at trap_fatal+0x6bd/frame 0xfffffe005405a610
trap_pfault() at trap_pfault+0x182/frame 0xfffffe005405a750
trap() at trap+0x5b3/frame 0xfffffe005405a930
calltrap() at calltrap+0x8/frame 0xfffffe005405a930
--- trap 0xc, rip = 0xffffffff81add5e9, rsp = 0xfffffe005405aa00, rbp = 0xfffffe005405aa30 ---
tcp_sack_output() at tcp_sack_output+0x119/frame 0xfffffe005405aa30
tcp_default_output() at tcp_default_output+0xae3/frame 0xfffffe005405afc0
tcp_output() at tcp_output+0x57/frame 0xfffffe005405aff0
tcp_do_segment() at tcp_do_segment+0x63fa/frame 0xfffffe005405b2a0
tcp_input_with_port() at tcp_input_with_port+0x1cb0/frame 0xfffffe005405b530
tcp_input() at tcp_input+0x1f/frame 0xfffffe005405b550
ip_input() at ip_input+0x7ae/frame 0xfffffe005405b670
netisr_dispatch_src() at netisr_dispatch_src+0x211/frame 0xfffffe005405b750
ether_demux() at ether_demux+0x44b/frame 0xfffffe005405b830
ether_nh_input() at ether_nh_input+0xb94/frame 0xfffffe005405b910
netisr_dispatch_src() at netisr_dispatch_src+0x211/frame 0xfffffe005405b9f0
ether_input() at ether_input+0x199/frame 0xfffffe005405bad0
vtnet_rxq_eof() at vtnet_rxq_eof+0x1588/frame 0xfffffe005405bcd0
vtnet_rx_vq_process() at vtnet_rx_vq_process+0x19a/frame 0xfffffe005405bd90
ithread_loop() at ithread_loop+0x4ee/frame 0xfffffe005405bef0
fork_exit() at fork_exit+0xd0/frame 0xfffffe005405bf30
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe005405bf30
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100053 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x275b92a(%rip)
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0xffffffff8172b166  printf+0xf6
rdx                        0x1
rbx                          0
rsp         0xfffffe005405a330
rbp         0xfffffe005405a350
rsi                          0
rdi         0xffffffff8172b1c8  printf+0x158
r8                           0
r9                  0xffffffff
r10                          0
r11         0xfffffe005730ac50
r12                          0
r13         0xfffffe0053f561e0
r14         0xffffffff82b5b9c0  .str.26
r15         0xffffffff82b5b9c0  .str.26
rip         0xffffffff8171aceb  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x275b92a(%rip)
db> show proc
Process 12 (intr) at 0xfffffe0053ddc548:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff83e19cc0
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff83e19cc0 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff83e1ac60
   (map 0xffffffff83e1ac60)
   (map.pmap 0xffffffff83e1ad20)
   (pmap 0xffffffff83e1ad88)
 threads: 22
100015                   I                                   [swi5: fast taskq]
100018                   I                                   [swi6: task queue]
100019                   I                                   [swi6: Giant taskq]
100031                   I                                   [swi1: netisr 0]
100032                   RunQ                                [swi1: hpts]
100033                   I                                   [swi1: hpts]
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                   Run     CPU 0                       [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq33: virtio_pci2]
100060                   I                                   [irq34: virtio_pci2]
100061                   I                                   [irq35: virtio_pci2]
100063                   I                                   [irq1: atkbd0]
100064                   I                                   [irq12: psm0]
100065                   RunQ                                [swi0: uart uart++]
100069                   I                                   [swi1: pf send]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
37522   811   811     0  R       (threaded)                  syz-executor.3
141209                   RunQ                                syz-executor.3
142270                   S       connec  0xfffffe0058c810da  syz-executor.3
142271                   S       uwait   0xfffffe009f1c1380  syz-executor.3
31297     0     0     0  DL      -       0xffffffff83f639c0  [soaiod4]
31296     0     0     0  DL      -       0xffffffff83f639c0  [soaiod3]
31295     0     0     0  DL      -       0xffffffff83f639c0  [soaiod2]
31294     0     0     0  DL      -       0xffffffff83f639c0  [soaiod1]
 7104     1  7104    65  Ss      select  0xfffffe0007986940  dhclient
 5828     1  5828     0  Ss      select  0xfffffe005788b540  dhclient
 5825     1  5825     0  Ss      select  0xfffffe005788b5c0  dhclient
 5806     1  5806    65  Ss      select  0xfffffe005788b6c0  dhclient
 4846     1  4846     0  Ss      select  0xfffffe005788b740  dhclient
 4843     1  4843     0  Ss      select  0xfffffe0007987440  dhclient
 4811     1  4811    65  Ss      select  0xfffffe005788ba40  dhclient
 3501     1  3501     0  Ss      select  0xfffffe0007986d40  dhclient
 3498     1  3498     0  Ss      select  0xfffffe005788bac0  dhclient
 3479     1  3479    65  Ss      select  0xfffffe0007986cc0  dhclient
 1370     1  1370     0  Ss      select  0xfffffe0007987140  dhclient
 1364     1  1364     0  Ss      select  0xfffffe0007986ec0  dhclient
  898     1   811     0  S       uwait   0xfffffe0057873800  syz-executor.3
  892     1   790     0  S       uwait   0xfffffe005730ef00  syz-executor.2
  887     1   811     0  S       uwait   0xfffffe009f088d80  syz-executor.3
  886     0     0     0  DL      aiordy  0xfffffe009f183000  [aiod4]
  885     0     0     0  DL      aiordy  0xfffffe009f183548  [aiod3]
  884     0     0     0  DL      aiordy  0xfffffe009f183a90  [aiod2]
  883     0     0     0  DL      aiordy  0xfffffe009f184000  [aiod1]
  881     1   790     0  S       uwait   0xfffffe0057873000  syz-executor.2
  880     1   790     0  S       uwait   0xfffffe0053de7180  syz-executor.2
  877     1   790     0  S       uwait   0xfffffe0057873780  syz-executor.2
  811   774   811     0  Rs                                  syz-executor.3
  790   774   790     0  Ss      piperd  0xfffffe0058beb000  syz-executor.2
  778   774   778     0  Ss      piperd  0xfffffe0058bdd000  syz-executor.1
  777   774   777     0  Ss      piperd  0xfffffe0058bdb8b8  syz-executor.0
  774   772   772     0  R       (threaded)                  syz-fuzzer
100112                   S       uwait   0xfffffe0053de7f00  syz-fuzzer
100113                   RunQ                                syz-fuzzer
100114                   S       uwait   0xfffffe005730b180  syz-fuzzer
100115                   S       uwait   0xfffffe005730b280  syz-fuzzer
100116                   S       uwait   0xfffffe0057874300  syz-fuzzer
100117                   S       uwait   0xfffffe005730b380  syz-fuzzer
100118                   RunQ                                syz-fuzzer
100119                   S       uwait   0xfffffe005730b580  syz-fuzzer
100120                   S       uwait   0xfffffe0057874400  syz-fuzzer
  772   770   772     0  Ss      pause   0xfffffe0058cb0b40  csh
  770   688   770     0  Ls     *tcpinp  0xfffffe0057871240  sshd
  754     1   754     0  Ss+     ttyin   0xfffffe00081ec8b0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe0058600cb0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe00586010b0  getty
  751     1   751     0  Ss+     ttyin   0xfffffe00081eb0b0  getty
  750     1   750     0  Ss+     ttyin   0xfffffe00081eb4b0  getty
  749     1   749     0  Ss+     ttyin   0xfffffe00081eb8b0  getty
  748     1   748     0  Ss+     ttyin   0xfffffe00586014b0  getty
  747     1   747     0  Ss+     ttyin   0xfffffe00586018b0  getty
  746     1   746     0  Ss+     ttyin   0xfffffe0058601cb0  getty
  692     1   692     0  Ss      nanslp  0xffffffff83e43cc1  cron
  688     1   688     0  Ss      select  0xfffffe005788bc40  sshd
  501     1   501     0  Ss      select  0xfffffe00079875c0  syslogd
  430     1   430     0  Ss      select  0xfffffe005788c0c0  devd
  429     1   429    65  Ss      select  0xfffffe005788bdc0  dhclient
  344     1   344     0  Ss      select  0xfffffe0007987640  dhclient
  341     1   341     0  Ss      select  0xfffffe005788c040  dhclient
   17     0     0     0  DL      vlruwt  0xfffffe0056f78548  [vnlru]
   16     0     0     0  DL      syncer  0xffffffff83f694e0  [syncer]
   15     0     0     0  RL      (threaded)                  [bufdaemon]
100079                   D       psleep  0xffffffff83f67b00  [bufdaemon]
100082                   D       -       0xffffffff83211f80  [bufspacedaemon-0]
100095                   RunQ                                [/ worker]
    9     0     0     0  DL      psleep  0xffffffff83f9b5c0  [vmdaemon]
    8     0     0     0  RL      (threaded)                  [pagedaemon]
100077                   RunQ                                [dom0]
100083                   D       launds  0xffffffff83f8f484  [laundry: dom0]
100084                   D       umarcl  0xffffffff81e4d440  [uma]
    7     0     0     0  RL                                  [rand_harvestq]
    6     0     0     0  RL                                  [pf purge]
    5     0     0     0  DL      waiting 0xffffffff846de460  [sctp_iterator]
    4     0     0     0  DL      (threaded)                  [cam]
100044                   D       -       0xffffffff83aa3240  [doneq0]
100045                   D       -       0xffffffff83aa31c0  [async]
100076                   D       -       0xffffffff83aa3040  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0053f9f088  [sequencer 00]
    3     0     0     0  DL      (threaded)                  [crypto]
100040                   D       crypto_ 0xffffffff83f8aca0  [crypto]
100041                   D       crypto_ 0xfffffe0053c8b330  [crypto returns 0]
100042                   D       crypto_ 0xfffffe0053c8b380  [crypto returns 1]
   13     0     0     0  DL      (threaded)                  [geom]
100035                   D       -       0xffffffff83e192c0  [g_event]
100036                   D       -       0xffffffff83e192e0  [g_up]
100037                   D       -       0xffffffff83e19300  [g_down]
    2     0     0     0  RL      (threaded)                  [clock]
100029                   Run     CPU 1                       [clock (0)]
100030                   I                                   [clock (1)]
   12     0     0     0  RL      (threaded)                  [intr]
100015                   I                                   [swi5: fast taskq]
100018                   I                                   [swi6: task queue]
100019                   I                                   [swi6: Giant taskq]
100031                   I                                   [swi1: netisr 0]
100032                   RunQ                                [swi1: hpts]
100033                   I                                   [swi1: hpts]
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                   Run     CPU 0                       [irq31: virtio_pci1]
100054                   I                                   [irq32: virtio_pci1]
100059                   I                                   [irq33: virtio_pci2]
100060                   I                                   [irq34: virtio_pci2]
100061                   I                                   [irq35: virtio_pci2]
100063                   I                                   [irq1: atkbd0]
100064                   I                                   [irq12: psm0]
100065                   RunQ                                [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    0xfffffe0053ddd000  [init]
   10     0     0     0  DL      audit_w 0xffffffff83f8b780  [audit]
    0     0     0     0  DLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff83e19cc0  [swapper]
100005                   D       -       0xfffffe0053e98100  [if_config_tqg_0]
100006                   D       -       0xfffffe0053e98000  [softirq_0]
100007                   D       -       0xfffffe0053e97e00  [softirq_1]
100008                   D       -       0xfffffe0053e97d00  [if_io_tqg_0]
100009                   D       -       0xfffffe0053e97c00  [if_io_tqg_1]
100010                   D       -       0xfffffe0008183d00  [inm_free taskq]
100011                   D       -       0xfffffe0008183c00  [linuxkpi_irq_wq]
100012                   D       -       0xfffffe0008183b00  [in6m_free taskq]
100013                   D       -       0xfffffe0008183a00  [deferred_unmount ta]
100014                   D       -       0xfffffe0008183900  [thread taskq]
100016                   D       -       0xfffffe0008183700  [kqueue_ctx taskq]
100017                   D       -       0xfffffe0008183600  [pci_hp taskq]
100020                   D       -       0xfffffe0008183300  [aiod_kick taskq]
100021                   D       -       0xfffffe0008183200  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe0008183200  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe0008183200  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe0008183200  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe0008183100  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe0008183100  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe0008183100  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe0008183100  [linuxkpi_long_wq_3]
100034                   D       -       0xfffffe0008183000  [firmware taskq]
100038                   D       -       0xfffffe0008182d00  [crypto_0]
100039                   D       -       0xfffffe0008182d00  [crypto_1]
100055                   D       -       0xfffffe0056fe8b00  [vtnet0 rxq 0]
100056                   D       -       0xfffffe0056fe8a00  [vtnet0 txq 0]
100057                   D       -       0xfffffe0056fe8900  [vtnet0 rxq 1]
100058                   D       -       0xfffffe0056fe8800  [vtnet0 txq 1]
100062                   D       vtbslp  0xfffffe0057317c80  [virtio_balloon]
100066                   D       -       0xffffffff82b61841  [deadlkres]
100070                   D       -       0xfffffe0008184100  [mca taskq]
100071                   D       -       0xfffffe0057926400  [acpi_task_0]
100072                   D       -       0xfffffe0057926400  [acpi_task_1]
100073                   D       -       0xfffffe0057926400  [acpi_task_2]
100075                   D       -       0xfffffe0008182a00  [CAM taskq]
db> show all locks
Process 770 (sshd) thread 0xfffffe0058b12560 (100105)
exclusive sx so_snd_sx (so_snd_sx) r = 0 (0xfffffe0058ded500) locked @ /syzkaller/managers/main/kernel/sys/kern/uipc_socket.c:4169
Process 12 (intr) thread 0xfffffe0053f561e0 (100053)
exclusive rw tcpinp (tcpinp) r = 0 (0xfffffe009ebf3360) locked @ /syzkaller/managers/main/kernel/sys/netinet/in_pcb.c:1551
exclusive sleep mutex vtnet0-rx1 (vtnet0-rx1) r = 0 (0xfffffe0056fb1580) locked @ /syzkaller/managers/main/kernel/sys/dev/virtio/network/if_vtnet.c:2195
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
          tcp_hpts            7         4801K            7
            devbuf         4217         4323K         4245
         sysctloid        35322         2081K        35393
             vtbuf           24         1968K           46
               pcb          809         1419K        63909
              kobj          328         1312K          490
            newblk            9         1026K        76269
          vfscache            3         1025K            3
          inodedep          620          745K        40821
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
         sctp_stro          392          392K         8296
           subproc          159          307K        37617
         sctp_atcl          784          294K        40504
              vmem            3          274K            5
          filedesc           24          185K        73003
            acpica         1674          184K        57552
         vnet_data            1          168K            1
            dirrem          609          153K        39030
           tidhash            3          141K            3
            linker          358          134K          386
           pagedep            9          130K        36505
        tfo_ccache            1          128K            1
            DEVFS1          109          109K          126
               sem            4          106K            4
               BPF           46           88K           71
               bus          995           81K         5208
          freefile          610           77K        39022
          mtx_pool            2           72K            2
          syncache            1           68K            1
            module          514           65K          514
          acpitask            1           64K            1
       ddb_capture            1           64K            1
              umtx          418           53K          418
         sctp_atky         1176           49K        50153
           kdtrace          235           46K        79795
              temp           34           33K         3994
            DEVFS3          128           32K          138
         hostcache            1           32K            1
               shm            1           32K            6
               msg            4           30K            4
         sctp_timw          105           27K          105
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
            ifaddr           71           21K           73
        DEVFS_RULE           56           20K           56
         ufs_mount            4           17K            5
              proc            3           17K            3
               tty           16           16K           16
          routetbl          136           16K          428
           ithread           97           16K           97
            bus-sc           34           15K         1681
           lltable           43           14K          125
       ether_multi          157           13K          167
            KTRACE          100           13K          100
         sctp_athm          784           13K        41234
          sctp_map          784           13K        16502
             ifnet            7           13K            7
      eventhandler          136           12K          136
              kenv           95           12K           95
              rman           88           11K          431
              GEOM           61           11K          490
         CAM queue            5           11K         1528
         in6_multi           71            9K           71
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K          292
               rpc            2            8K            2
         bmsafemap            1            8K        39865
             shmfd            1            8K           54
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          296
         taskqueue           63            7K           63
              cred           26            7K          319
            kqueue           70            7K        37544
            sglist            5            7K            5
           CAM DEV            3            6K          510
            plimit           24            6K          506
       ufs_dirhash           24            5K           24
               UMA          272            5K          272
           session           35            5K           59
          pf_ifnet           10            5K           19
            DEVFSP           68            5K          834
           pwddesc           68            5K        37523
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
           acpisem           28            4K           28
         proc-args           95            4K        38956
             lockf           32            4K           66
           pf_rule           27            4K           42
             hhook           15            4K           17
          kcovinfo           52            4K           52
             selfd           48            3K       512444
          terminal           11            3K           11
            select           19            3K           64
           uidinfo            3            3K           27
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           15
          sctp_ifa           14            2K           15
            Unitno           29            2K         1193
           CAM XPT           22            2K          543
               msi           12            2K           12
          in_multi            6            2K            8
          freework            5            2K        53806
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
             clone            9            2K            9
               tun            7            2K            7
           softdep            1            1K            1
             mkdir            8            1K        72968
          freeblks            4            1K        38359
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K          106
      NFSD session            1            1K            1
        CAM periph            4            1K          271
       inpcbpolicy           26            1K        20802
             ipsec            3            1K            3
          sctp_ifn            6            1K           15
               mld            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
            diradd            5            1K        39072
            crypto            4            1K            4
 encap_export_host           12            1K           12
          procdesc            5            1K           18
         newdirblk            4            1K        36484
              pfil            4            1K            4
              cdev            2            1K            2
               osd            9            1K        18759
    chacha20random            1            1K            1
            CC Mem            5            1K        18775
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
           CAM SIM            2            1K            2
            feeder            7            1K            7
           tcpfunc            3            1K            3
        loginclass            3            1K            6
            prison            6            1K            6
       lkpikmalloc            5            1K            6
        aesni_data            2            1K            2
         cryptodev            2            1K          233
          nexusdev            8            1K            8
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8331    1067     1848293       0     254   38494208        0
        RADIX NODE    144   19295     440      755482       0      63    2841840        0
              mbuf    256    9799     629     3454434       0     254    2669568        0
              pbuf   2624       0     957           0       0       2    2511168        0
           tcp_log    416       0    5589      103816       0     254    2325024        0
         sctp_asoc   2256     392     373        8251       0     254    1725840        0
          BUF TRIE    144     188   11600       42713       0      62    1697472        0
        malloc-384    384    4155      45        4156       0      30    1612800        0
      mbuf_cluster   2048     762       0         762       0     254    1560576        0
        malloc-128    128   11907     214       12775       0     126    1551488        0
       malloc-4096   4096     330       4        1119       0       2    1368064        0
       UMA Slabs 0    112   11169      21       11169       0     126    1253280        0
         vmem btag     56   19847      64       19847       0     254    1115016        0
        malloc-384    384     622    2018       40845       0      30    1013760        0
           sctp_ep   1208     392     378       31593       0     254     930160        0
             tcpcb   1104       5     758       18748       0     254     842352        0
       malloc-2048   2048     393      15       31594       0       8     835584        0
        malloc-256    256    1029    1896      110241       0      62     748800        0
            socket    960      51     713       53838       0     254     733440        0
         VM OBJECT    264    2287     248      806687       0      31     669240        0
         FFS inode   1160     524      50       39546       0       9     665840        0
        malloc-256    256     116    2374       80383       0      62     637440        0
        sctp_raddr    736     392     378        8251       0     254     566720        0
        256 Bucket   2048     234      22        8068       0       8     524288        0
       malloc-1024   1024     394      22        9581       0      16     425984        0
       tcp_bbr_map    128       2    3284       88849       0     126     420608        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
            THREAD   1808     166      43       42271       0       8     377872        0
        malloc-128    128     650    2016       48364       0     126     341248        0
         MAP ENTRY     96    2998     530     1906892       0     126     338688        0
        malloc-384    384     837      33       40823       0      30     334080        0
      malloc-16384  16384      13       7       36516       0       1     327680        0
         malloc-64     64    4353     750      517304       0     254     326592        0
       malloc-4096   4096      68       8       37523       0       2     311296        0
             VNODE    448     565     101       39589       0      30     298368        0
    ertt_txseginfo     40       4    6864      465839       0     254     274720        0
      malloc-65536  65536       4       0           4       0       1     262144        0
         malloc-16     16   14844     156       29665       0     254     240000        0
      malloc-32768  32768       0       7       21950       0       2     229376        0
            DEVCTL   1024       0     220         155       0       0     225280        0
      malloc-65536  65536       1       2         409       0       1     196608        0
      malloc-65536  65536       1       2           9       0       1     196608        0
       mbuf_packet    256      58     704       62545       0     254     195072        0
        malloc-128    128    1202     317       27110       0     126     194432        0
         malloc-32     32    5675     247        7377       0     254     189504        0
         UMA Zones    768     244       0         244       0      16     187392        0
     FPU_save_area    832     168      48       49672       0      16     179712        0
       FFS2 dinode    256     524     166       39546       0      62     176640        0
       malloc-4096   4096      39       3          59       0       2     172032        0
       S VFS Cache    104    1023     498       42881       0     126     158184        0
        128 Bucket   1024     114      33        5628       0      16     150528        0
       malloc-1024   1024     119      25         138       0      16     147456        0
        malloc-256    256      43     527      130273       0      62     145920        0
           VMSPACE   2552      43      14       37499       0       4     145464        0
      malloc-65536  65536       0       2         139       0       1     131072        0
      malloc-65536  65536       2       0           2       0       1     131072        0
             unpcb    256      20     490        1388       0     254     130560        0
            clpbuf   2624       0      48          66       0      16     125952        0
              PROC   1352      67      23       37522       0       8     121680        0
         64 Bucket    512     158      74       38260       0      30     118784        0
          ksiginfo    112      79     965        9782       0     126     116928        0
        malloc-128    128     501     274       73599       0     126      99200        0
        malloc-128    128     620     155        1508       0     126      99200        0
      malloc-32768  32768       1       2         121       0       1      98304        0
         filedesc0   1072      68      23       37523       0       8      97552        0
        malloc-256    256     208     167        2717       0      62      96000        0
        malloc-256    256     220     155       42855       0      62      96000        0
          UMA Kegs    384     230       3         230       0      30      89472        0
         malloc-64     64     584     739       20416       0     254      84672        0
       malloc-8192   8192       8       2         146       0       1      81920        0
         32 Bucket    256     148     167       13071       0      62      80640        0
        sctp_readq    152       0     520         304       0     254      79040        0
        sctp_chunk    152     329     191        1975       0     254      79040        0
         tcp_inpcb    424       5     175       18748       0      30      76320        0
              pipe    744      25      75         814       0      16      74400        0
             g_bio    408       0     180      309629       0      30      73440        0
         malloc-64     64     320     751       24209       0     254      68544        0
        malloc-128    128     187     340       39747       0     126      67456        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-16384  16384       4       0           4       0       1      65536        0
       malloc-2048   2048       9      23        5437       0       8      65536        0
       malloc-1024   1024      18      46         533       0      16      65536        0
        malloc-256    256     117     138       46725       0      62      65280        0
sctp_stream_msg_out    112      70     470        1653       0     254      60480        0
        malloc-384    384     110      40         192       0      30      57600        0
       malloc-8192   8192       1       6         547       0       1      57344        0
         udp_inpcb    424      14     112         483       0      30      53424        0
             ripcb    424       7     119         839       0      30      53424        0
         malloc-64     64     153     666       75791       0     254      52416        0
         malloc-64     64     523     296        9753       0     254      52416        0
             Files     80     237     413      113016       0     126      52000        0
           DIRHASH   1024      35      13          35       0      16      49152        0
             NAMEI   1024       0      48      178190       0      16      49152        0
       malloc-8192   8192       4       2          32       0       1      49152        0
       malloc-2048   2048      10      14          13       0       8      49152        0
       malloc-2048   2048       0      24         574       0       8      49152        0
      tcp_rack_pcb    896       0      54        3857       0      16      48384        0
       tcp_bbr_pcb    832       1      53       10444       0      16      44928        0
          syncache    168       0     264           4       0     254      44352        0
         TURNSTILE    136     210     105         210       0      62      42840        0
       malloc-8192   8192       4       1           7       0       1      40960        0
       malloc-4096   4096       4       6         132       0       2      40960        0
            pcpu-8      8    4709     411        5040       0     254      40960        0
       Mountpoints   2752       2      12           2       0       4      38528        0
     udplite_inpcb    424       0      90         732       0      30      38160        0
            da_ccb    544       0      70       77512       0      16      38080        0
         hostcache     64       2     565           2       0     254      36288        0
               PWD     32      24    1110       36587       0     254      36288        0
         malloc-64     64      30     537         452       0     254      36288        0
         malloc-64     64     162     405       37819       0     254      36288        0
         malloc-32     32     802     332       76840       0     254      36288        0
         16 Bucket    144      88     164        5919       0      62      36288        0
          8 Bucket     80      45     405        2930       0     126      36000        0
        malloc-128    128      43     236       36684       0     126      35712        0
        malloc-128    128     102     177         138       0     126      35712        0
     routing nhops    256      27     108          35       0      62      34560        0
           ttyoutq    256      72      63         160       0      62      34560        0
        malloc-256    256      56      79         137       0      62      34560        0
        malloc-256    256      18     117        2414       0      62      34560        0
        SLEEPQUEUE     88     210     174         210       0     126      33792        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-16384  16384       0       2         160       0       1      32768        0
       malloc-8192   8192       4       0           4       0       1      32768        0
       malloc-4096   4096       1       7       36738       0       2      32768        0
       malloc-2048   2048       1      15          13       0       8      32768        0
       malloc-2048   2048       3      13          34       0       8      32768        0
       malloc-2048   2048       9       7           9       0       8      32768        0
       malloc-1024   1024       2      30          42       0      16      32768        0
       malloc-1024   1024       7      25         385       0      16      32768        0
       malloc-1024   1024      17      15          17       0      16      32768        0
        malloc-512    512       2      62         224       0      30      32768        0
        malloc-512    512      11      53          40       0      30      32768        0
        malloc-512    512       0      64        1380       0      30      32768        0
        malloc-512    512      11      53          60       0      30      32768        0
           pcpu-64     64     493      19         493       0     254      32768        0
             KNOTE    160      28     172      302564       0      62      32000        0
            ttyinq    160     135      65         300       0      62      32000        0
      tcp_rack_map    120       0     264        8056       0     126      31680        0
            cpuset    104       9     270        4455       0     126      29016        0
        sctp_laddr     48       0     588        3550       0     254      28224        0
   tcp_inpcb ports     32       3     879       14192       0     254      28224        0
              ertt     72       5     387       18748       0     126      28224        0
         malloc-32     32     132     750         501       0     254      28224        0
          4 Bucket     48       7     581         777       0     254      28224        0
          2 Bucket     32      69     813        7758       0     254      28224        0
       malloc-4096   4096       4       2           8       0       2      24576        0
           rtentry    176      31     107          35       0      62      24288        0
              PGRP     88      35     241          59       0     126      24288        0
          rl_entry     40      99     507          99       0     254      24240        0
         malloc-16     16     843     657       54783       0     254      24000        0
        malloc-384    384      20      40         361       0      30      23040        0
        malloc-384    384      24      36          26       0      30      23040        0
         domainset     40       0     567        3873       0     254      22680        0
             udpcb     32      14     616        1215       0     254      20160        0
   udp_inpcb ports     32       3     627          63       0     254      20160        0
         malloc-32     32      37     593         428       0     254      20160        0
         malloc-32     32      95     535       43357       0     254      20160        0
         malloc-32     32      14     616         561       0     254      20160        0
         malloc-32     32      29     601        1234       0     254      20160        0
         malloc-32     32     102     528       24683       0     254      20160        0
         malloc-16     16     829     421       60100       0     254      20000        0
             AIOCB    552       0      35          67       0      16      19320        0
            AIOLIO    272       0      70           4       0      30      19040        0
 epoch_record pcpu    256       4      60           4       0      62      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
       malloc-4096   4096       1       3           8       0       2      16384        0
       malloc-2048   2048       2       6         195       0       8      16384        0
       malloc-1024   1024       6      10           6       0      16      16384        0
       malloc-1024   1024       1      15           1       0      16      16384        0
        malloc-512    512       0      32           1       0      30      16384        0
        malloc-512    512       1      31           1       0      30      16384        0
        malloc-512    512       1      31           2       0      30      16384        0
           SMR CPU     32       7     504           7       0     254      16352        0
      vtnet_tx_hdr     24       0     668     1274562       0     254      16032        0
               AIO    208       0      76          39       0      62      15808        0
              kenv    258      15      45        1053       0      30      15480        0
            mqnode    416       3      33           3       0      30      14976        0
              vmem   1856       1       7           1       0       8      14848        0
        SMR SHARED     24       7     504           7       0     254      12264        0
          sackhole     32       1     377           2       0     254      12096        0
              AIOP     32       4     374           4       0     254      12096        0
         malloc-16     16      37     713       42628       0     254      12000        0
         malloc-16     16      15     735          57       0     254      12000        0
         malloc-16     16       4     746           5       0     254      12000        0
         malloc-16     16     266     484         278       0     254      12000        0
         malloc-16     16      26     724       26234       0     254      12000        0
            itimer    352       0      33           3       0      30      11616        0
        malloc-384    384       2      28           2       0      30      11520        0
           pcpu-16     16      14     498          14       0     254       8192        0
       UMA Slabs 1    176      10      12          10       0      62       3872        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
            pcpu-4      4       1     511           1       0     254       2048        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    144       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    248       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 source nodes    136       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    312       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags    184       0       0           0       0      62          0        0
tfo_ccache_entries     80       0       0           0       0     126          0        0
               tfo      4       0       0           0       0     254          0        0
             tcptw     72       0       0           0       0     254          0        0
               ipq     56       0       0           0       0     254          0        0
   sctp_asconf_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       0       0           0       0     254          0        0
   tcp_log_id_node    120       0       0           0       0     126          0        0
 tcp_log_id_bucket    176       0       0           0       0      62          0        0
          tcpreass     48       0       0           0       0     254          0        0
udplite_inpcb ports     32       0       0           0       0     254          0        0
       ripcb ports     32       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    224       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
       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     32       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
    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-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-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
       malloc-4096   4096       0       0           0       0       2          0        0
        malloc-512    512       0       0           0       0      30          0        0
        malloc-384    384       0       0           0       0      30          0        0
         malloc-64     64       0       0           0       0     254          0        0
           pcpu-32     32       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-main 2022/06/08 14:47 freebsd-src 0a9541d9f344 b2706118 console log report Fatal trap NUM: page fault in tcp_sack_output
ci-freebsd-main 2022/06/08 12:27 freebsd-src 0a9541d9f344 b2706118 console log report Fatal trap NUM: page fault in tcp_sack_output
ci-freebsd-main 2022/06/08 01:54 freebsd-src 0a9541d9f344 b2706118 console log report Fatal trap NUM: page fault in tcp_sack_output
ci-freebsd-i386 2022/06/08 08:52 freebsd-src 0a9541d9f344 b2706118 console log report Fatal trap NUM: page fault in tcp_sack_output
* Struck through repros no longer work on HEAD.