syzbot


panic: ASan: Invalid access, 2-byte read in sctp_chunk_output

Status: auto-closed as invalid on 2021/11/27 23:53
Reported-by: syzbot+a83a01983b6e3068ab6d@syzkaller.appspotmail.com
First crash: 1040d, last: 996d

Sample crash report:
panic: ASan: Invalid access, 2-byte read at 0xfffffe00a3d7c6dc, UMAUseAfterFree(fd)
cpuid = 1
time = 1628676433
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe00077eb730
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe00077eb890
vpanic() at vpanic+0x2c5/frame 0xfffffe00077eb970
panic() at panic+0xb5/frame 0xfffffe00077eba30
__asan_load2_noabort() at __asan_load2_noabort+0x16e/frame 0xfffffe00077ebaf0
sctp_chunk_output() at sctp_chunk_output+0x287c/frame 0xfffffe00077ec710
sctp_timeout_handler() at sctp_timeout_handler+0x188b/frame 0xfffffe00077ec850
softclock_call_cc() at softclock_call_cc+0x3d9/frame 0xfffffe00077eca00
softclock() at softclock+0x152/frame 0xfffffe00077eca50
ithread_loop() at ithread_loop+0x4f1/frame 0xfffffe00077ecbb0
fork_exit() at fork_exit+0xd0/frame 0xfffffe00077ecbf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00077ecbf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100032 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x28ebcaa(%rip)
db> 
db> set $lines = 0
db> set $maxwidth = 0
db> show registers
cs                        0x20
ds                        0x3b
es                        0x3b
fs                        0x13
gs                        0x1b
ss                        0x28
rax                       0x12
rcx         0x23da6191be649e42
rdx                        0x1
rbx                          0
rsp         0xfffffe00077eb870
rbp         0xfffffe00077eb890
rsi                          0
rdi         0xffffffff817abc69  vprintf+0x319
r8                         0x3
r9          0xfffffe00077eb3a8
r10                          0
r11         0xfffffe00a7de5a70
r12         0xfffffe0053dfb020
r13         0xfffffe00077eb801
r14         0xffffffff82c62380  .str.18
r15         0xffffffff82c62380  .str.18
rip         0xffffffff8179f68b  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x28ebcaa(%rip)
db> show proc
Process 12 (intr) at 0xfffffe0053deea70:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff8402c6c0
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff8402c6c0 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff8402d640
   (map 0xffffffff8402d640)
   (map.pmap 0xffffffff8402d700)
   (pmap 0xffffffff8402d760)
 threads: 23
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100032                   Run     CPU 1                       [swi4: clock (0)]
100033                   I                                   [swi4: clock (1)]
100034                   L      *sctp-in 0xfffffe0053df4000  [swi1: netisr 0]
100035                   I                                   [swi3: vm]
100036                   I                                   [swi1: hpts]
100037                   I                                   [swi1: hpts]
100050                   I                                   [irq24: virtio_pci0]
100051                   I                                   [irq25: virtio_pci0]
100052                   I                                   [irq26: virtio_pci0]
100053                   I                                   [irq27: virtio_pci0]
100054                   I                                   [irq28: virtio_pci1]
100055                   I                                   [irq29: virtio_pci1]
100056                   I                                   [irq30: virtio_pci1]
100057                   I                                   [irq31: virtio_pci1]
100058                   I                                   [irq32: virtio_pci1]
100063                   I                                   [irq10: virtio_pci2]
100065                   I                                   [irq1: atkbd0]
100066                   I                                   [irq12: psm0]
100067                   I                                   [swi0: uart uart++]
100075                   I                                   [swi1: pf send]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 1437   800   800     0  T       (threaded)                  syz-executor.2
100771                   s                                   syz-executor.2
100988                   L      *kernel  0xfffffe00a7de9e40  syz-executor.2
100990                   L      *sctp-in 0xfffffe0053df4000  syz-executor.2
 1436   783   783     0  R       (threaded)                  syz-executor.0
100903                   RunQ                                syz-executor.0
100987                   L      *sctp-in 0xfffffe0053df4000  syz-executor.0
100989                   S       uwait   0xfffffe0058843b00  syz-executor.0
 1434   784   784     0  T       (threaded)                  syz-executor.1
100894                   s                                   syz-executor.1
100992                   RunQ                                syz-executor.1
100993                   RunQ                                syz-executor.1
100994                   RunQ                                syz-executor.1
 1365  1355  1365     0  Ss      select  0xfffffe00a3d71dc0  dhclient
 1361     1  1361     0  Ss      select  0xfffffe00a5d052c0  dhclient
 1355  1347   436    65  S       select  0xfffffe00a5d05340  dhclient
 1347   436   436     0  S       wait    0xfffffe009e95e538  sh
 1334     1  1334    65  Ss      select  0xfffffe00a3d71e40  dhclient
 1136     1  1136     0  Ss      select  0xfffffe00a3d71b40  dhclient
 1133     1  1133     0  Ss      select  0xfffffe00a3d71c40  dhclient
 1092     1  1092    65  Ss      select  0xfffffe00a5d05540  dhclient
  824     1   824     0  Ss      select  0xfffffe0058843140  dhclient
  817     1   817     0  Ss      select  0xfffffe00588432c0  dhclient
  805   780   805     0  Rs                                  syz-executor.3
  800   780   800     0  Ss      wait    0xfffffe0058738000  syz-executor.2
  784   780   784     0  Ss      wait    0xfffffe0058900a70  syz-executor.1
  783   780   783     0  Rs                                  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100116                   S       uwait   0xfffffe00588fd480  syz-fuzzer
100120                   S       uwait   0xfffffe00588fdc80  syz-fuzzer
100121                   S       uwait   0xfffffe00588fdd80  syz-fuzzer
100122                   S       uwait   0xfffffe00588fde00  syz-fuzzer
100123                   S       uwait   0xfffffe0058843400  syz-fuzzer
100124                   S       uwait   0xfffffe0058843800  syz-fuzzer
100125                   S       kqread  0xfffffe0058777600  syz-fuzzer
100126                   S       uwait   0xfffffe0058843500  syz-fuzzer
100127                   S       uwait   0xfffffe0058843600  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffffe009e4cb5e8  csh
  776   694   776     0  Ss      select  0xfffffe009e3c39c0  sshd
  760     1   760     0  Ss+     ttyin   0xfffffe0056fe2cb0  getty
  759     1   759     0  Ss+     ttyin   0xfffffe00575f88b0  getty
  758     1   758     0  Ss+     ttyin   0xfffffe00575f8cb0  getty
  757     1   757     0  Ss+     ttyin   0xfffffe00583e70b0  getty
  756     1   756     0  Ss+     ttyin   0xfffffe00583e74b0  getty
  755     1   755     0  Ss+     ttyin   0xfffffe00583e78b0  getty
  754     1   754     0  Ss+     ttyin   0xfffffe00583e7cb0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe00575220b0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe00575224b0  getty
  698     1   698     0  Ss      nanslp  0xffffffff84058201  cron
  694     1   694     0  Ss      select  0xfffffe00588fd2c0  sshd
  507     1   507     0  Ss      select  0xfffffe00588fd1c0  syslogd
  436     1   436     0  Ss      wait    0xfffffe0058885000  devd
  435     1   435    65  Ss      select  0xfffffe00588fd0c0  dhclient
  350     1   350     0  Ss      select  0xfffffe009e3c3dc0  dhclient
  347     1   347     0  Ss      select  0xfffffe00588fd240  dhclient
   23     0     0     0  DL      vlruwt  0xfffffe0058738538  [vnlru]
   22     0     0     0  DL      syncer  0xffffffff84180380  [syncer]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100085                   D       qsleep  0xffffffff8417e1a0  [bufdaemon]
100088                   D       -       0xffffffff83411f80  [bufspacedaemon-0]
100101                   D       sdflush 0xfffffe005891ace8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff841b6640  [vmdaemon]
   19     0     0     0  RL      (threaded)                  [pagedaemon]
100083                   RunQ                                [dom0]
100089                   D       launds  0xffffffff841aa184  [laundry: dom0]
100090                   D       umarcl  0xffffffff81e9a5a0  [uma]
   18     0     0     0  RL                                  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff848f6460  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff84d8be20  [pf purge]
   15     0     0     0  DL      -       0xffffffff841794c0  [soaiod4]
    9     0     0     0  DL      -       0xffffffff841794c0  [soaiod3]
    8     0     0     0  DL      -       0xffffffff841794c0  [soaiod2]
    7     0     0     0  DL      -       0xffffffff841794c0  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100048                   D       -       0xffffffff83c94ac0  [doneq0]
100049                   D       -       0xffffffff83c94a40  [async]
100082                   D       -       0xffffffff83c948c0  [scanner]
   14     0     0     0  DL      seqstat 0xfffffe0056a9dc88  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffffe0053c01b80  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffffe0053c01b30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff841a4220  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100039                   D       -       0xffffffff8402b7c0  [g_event]
100040                   D       -       0xffffffff8402b800  [g_up]
100041                   D       -       0xffffffff8402b840  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100029                   D       -       0xfffffe0053df5300  [thr_0]
100030                   D       -       0xfffffe0053df5380  [thr_1]
100031                   D       -       0xffffffff8417a748  [alloc_0]
   12     0     0     0  RL      (threaded)                  [intr]
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100032                   Run     CPU 1                       [swi4: clock (0)]
100033                   I                                   [swi4: clock (1)]
100034                   L      *sctp-in 0xfffffe0053df4000  [swi1: netisr 0]
100035                   I                                   [swi3: vm]
100036                   I                                   [swi1: hpts]
100037                   I                                   [swi1: hpts]
100050                   I                                   [irq24: virtio_pci0]
100051                   I                                   [irq25: virtio_pci0]
100052                   I                                   [irq26: virtio_pci0]
100053                   I                                   [irq27: virtio_pci0]
100054                   I                                   [irq28: virtio_pci1]
100055                   I                                   [irq29: virtio_pci1]
100056                   I                                   [irq30: virtio_pci1]
100057                   I                                   [irq31: virtio_pci1]
100058                   I                                   [irq32: virtio_pci1]
100063                   I                                   [irq10: virtio_pci2]
100065                   I                                   [irq1: atkbd0]
100066                   I                                   [irq12: psm0]
100067                   I                                   [swi0: uart uart++]
100075                   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    0xfffffe0053d4f538  [init]
   10     0     0     0  DL      audit_w 0xffffffff841a51c0  [audit]
    0     0     0     0  RLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff8402c6c0  [swapper]
100005                   D       -       0xfffffe0053de6e00  [if_config_tqg_0]
100006                   D       -       0xfffffe0053de6d00  [softirq_0]
100007                   D       -       0xfffffe0053de6c00  [softirq_1]
100008                   D       -       0xfffffe0053de6b00  [if_io_tqg_0]
100009                   D       -       0xfffffe0053de6a00  [if_io_tqg_1]
100010                   D       -       0xfffffe0053de6900  [in6m_free taskq]
100011                   D       -       0xfffffe0053de6800  [deferred_unmount ta]
100014                   Run     CPU 0                       [thread taskq]
100016                   D       -       0xfffffe0053de6300  [linuxkpi_irq_wq]
100017                   D       -       0xfffffe0053de6200  [kqueue_ctx taskq]
100018                   D       -       0xfffffe0053de6100  [aiod_kick taskq]
100019                   D       -       0xfffffe0053de6000  [pci_hp taskq]
100020                   D       -       0xfffffe0053df6e00  [inm_free taskq]
100021                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_0]
100022                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_1]
100023                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_2]
100024                   D       -       0xfffffe0053df6d00  [linuxkpi_short_wq_3]
100025                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_0]
100026                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_1]
100027                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_2]
100028                   D       -       0xfffffe0053df6c00  [linuxkpi_long_wq_3]
100038                   D       -       0xfffffe0053df6a00  [firmware taskq]
100042                   D       -       0xfffffe0053df6000  [crypto_0]
100043                   D       -       0xfffffe0053df6000  [crypto_1]
100059                   D       -       0xfffffe0056b83500  [vtnet0 rxq 0]
100060                   D       -       0xfffffe0056b83400  [vtnet0 txq 0]
100061                   D       -       0xfffffe0056b83300  [vtnet0 rxq 1]
100062                   D       -       0xfffffe0056b83200  [vtnet0 txq 1]
100064                   D       vtbslp  0xfffffe0056fb0480  [virtio_balloon]
100068                   D       -       0xfffffe0056fc6100  [mca taskq]
100073                   D       -       0xffffffff82c69301  [deadlkres]
100077                   D       -       0xfffffe0056a42900  [acpi_task_0]
100078                   D       -       0xfffffe0056a42900  [acpi_task_1]
100079                   D       -       0xfffffe0056a42900  [acpi_task_2]
100081                   D       -       0xfffffe0056a42700  [CAM taskq]
db> show all locks
Process 1437 (syz-executor.2) thread 0xfffffe00a7de63a0 (100988)
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00081abf40) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:2402
Process 12 (intr) thread 0xfffffe0053dfb020 (100032)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe00a75688b0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctputil.c:1768
Process 0 (kernel) thread 0xfffffe0053df13a0 (100014)
exclusive sleep mutex kernel arena domain (kernel arena domain) r = 0 (0xfffff80007001000) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:789
exclusive sleep mutex vmem list lock (vmem list lock) r = 0 (0xffffffff83409bc0) locked @ /syzkaller/managers/main/kernel/sys/kern/subr_vmem.c:784
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4338K         4244
          tcp_hpts            6         3201K            6
         sysctloid        34332         2028K        34402
             vtbuf           24         1968K           46
              kobj          326         1304K          485
            newblk            7         1026K         1199
          vfscache            3         1025K            3
               pcb           96          614K         1724
          inodedep           11          516K          659
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
              vmem            3          274K            5
           subproc          136          269K         1514
            acpica         1674          184K        55752
         vnet_data            1          168K            1
           tidhash            3          141K            3
            linker          356          140K          396
           pagedep           10          131K          584
        tfo_ccache            1          128K            1
          filedesc           16          121K         1163
            DEVFS1          107          107K          124
               sem            4          106K            4
               bus          984           80K         3475
          mtx_pool            2           72K            2
               BPF           38           71K           38
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          509           64K          509
              umtx          352           44K          352
           kdtrace          220           44K         2434
         sctp_stro           33           33K          281
              temp           35           33K         2129
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          126           32K          136
               msg            4           30K            4
         sctp_atcl           71           27K         1023
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
        DEVFS_RULE           56           20K           56
            ifaddr           69           20K           71
         ufs_mount            4           17K            5
              proc            3           17K            3
          routetbl          130           17K          418
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           33           14K         1692
           lltable           44           14K           60
            KTRACE          100           13K          100
             ifnet            7           13K            7
       ether_multi          152           13K          162
              kenv           95           12K           95
      eventhandler          133           12K          133
         CAM queue            5           11K         1528
              GEOM           61           10K          489
              rman           84           10K          425
         in6_multi           65            9K           65
         bmsafemap            3            9K          629
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            5
         sctp_timw           32            8K           32
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          295
         taskqueue           63            7K           63
              cred           25            7K          223
            sglist            5            7K            5
           CAM DEV            3            6K          510
            kqueue           62            6K         1451
            plimit           23            6K          394
         sctp_atky          109            6K         1387
            DEVFSP           78            5K          226
       ufs_dirhash           24            5K           24
               UMA          270            5K          270
          pf_ifnet           10            5K           19
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
           session           31            4K           42
           pwddesc           60            4K         1438
           acpisem           28            4K           28
             hhook           15            4K           17
             lockf           28            3K           47
             selfd           45            3K        30933
          terminal           11            3K           11
         proc-args           50            3K          613
           uidinfo            3            3K            8
         sctp_stri            4            2K           52
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
            select           16            2K           47
            ip6ndp           12            2K           13
            Unitno           29            2K           47
          sctp_ifa           13            2K           14
           CAM XPT           22            2K          543
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
         sctp_athm           71            2K         1033
               tun            7            2K            7
          sctp_map           66            2K          562
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           32
      NFSD session            1            1K            1
        CAM periph            4            1K          271
          sctp_ifn            6            1K           14
             ipsec            3            1K            3
               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          617
            crypto            4            1K           59
 encap_export_host           12            1K           12
         newdirblk            4            1K          568
             mkdir            4            1K         1136
              pfil            4            1K            4
          procdesc            4            1K           12
              cdev            2            1K            2
       inpcbpolicy           15            1K          603
               osd            9            1K          315
    chacha20random            1            1K            1
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
           CAM SIM            2            1K            2
              ktls            1            1K            1
            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
           tcp_fsb            1            1K           80
            apmdev            1            1K            1
          atkbddev            2            1K            2
     CAM dev queue            2            1K            2
             xform            2            1K          204
 CAM I/O Scheduler            1            1K            1
          CAM path            4            1K         1034
            soname            5            1K         4473
          pmchooks            1            1K            1
          nexusdev            7            1K            7
          sctp_vrf            1            1K            1
         sctp_aadr            1            1K           15
          freework            1            1K          576
              vnet            1            1K            1
           entropy            2            1K           40
          acpiintr            1            1K            1
               pmc            1            1K            1
          filecaps            4            1K           86
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
          p1003.1b            1            1K            1
        vegas data            0            0K            5
          pf_table            0            0K            0
           pf_rule            0            0K            0
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
           pf_temp            0            0K            0
        cubic data            0            0K            5
        dctcp data            0            0K            0
            tcp_do            0            0K            0
          cdg data            0            0K            0
         htcp data            0            0K            0
          chd data            0            0K            0
            mqdata            0            0K            0
        sctp_mcore            0            0K            0
        sctp_socko            0            0K          487
         sctp_iter            0            0K           11
         sctp_mvrf            0            0K            0
         sctp_cpal            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
         sctp_a_it            0            0K           11
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320     979      846825       0     254   38088704        0
           tcp_log    416       0   13617       83106       0     254    5664672        0
              pbuf   2624       0     973           0       0       2    2553152        0
              mbuf    256    8824     746     1454443       0     254    2449920        0
        RADIX NODE    144   11404     379       69540       0      63    1696752        0
          BUF TRIE    144     189   11571         701       0      62    1693440        0
        malloc-384    384    4265      15        4613       0      30    1643520        0
        malloc-128    128   11292     240       12756       0     126    1476096        0
       malloc-4096   4096     326       2         490       0       2    1343488        0
       UMA Slabs 0    112   10507       2       10507       0     126    1177008        0
      mbuf_cluster   2048     570       0         570       0     254    1167360        0
         vmem btag     56   18115      76       18115       0     254    1018696        0
    ertt_txseginfo     40       0   17069      151570       0     254     682760        0
         FFS inode   1160     512      20        1091       0       8     617120        0
       tcp_bbr_map    128       0    4402       82294       0     126     563456        0
        256 Bucket   2048     258       0       16584       0       8     528384        0
      malloc-65536  65536       4       2         269       0       1     393216        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
         VM OBJECT    264    1230      75       22638       0      30     344520        0
            THREAD   1808     159      17         995       0       8     318208        0
       malloc-4096   4096      68       3        2073       0       2     290816        0
      malloc-16384  16384      12       5         759       0       1     278528        0
             VNODE    448     550      71        1131       0      30     278208        0
         malloc-64     64    4103      55        5523       0     254     266112        0
         malloc-16     16   14031     219       14136       0     254     228000        0
            DEVCTL   1024      13     207         152       0       0     225280        0
        malloc-256    256     281     559        2495       0      62     215040        0
      malloc-65536  65536       1       2           9       0       1     196608        0
         UMA Zones    768     242       2         242       0      16     187392        0
         malloc-32     32    5326     344        6420       0     254     181440        0
         MAP ENTRY     96    1544     304       78341       0     126     177408        0
        malloc-128    128    1211      60       26159       0     126     162688        0
       malloc-1024   1024     123      25        1970       0      16     151552        0
       mbuf_packet    256      82     488        2875       0     254     145920        0
         sctp_asoc   2288      33      27         281       0     254     137280        0
       FFS2 dinode    256     512      13        1090       0      62     134400        0
       S VFS Cache    104    1015     272        1643       0     126     133848        0
      malloc-65536  65536       2       0           2       0       1     131072        0
        128 Bucket   1024      85      34        1563       0      16     121856        0
          ksiginfo    112      59     985        2778       0     126     116928        0
       malloc-2048   2048      38      18         895       0       8     114688        0
           VMSPACE   2544      37       8        1416       0       4     114480        0
        malloc-128    128     802      35        1944       0     126     107136        0
            socket    944      41      71        2579       0     254     105728        0
              PROC   1336      59      16        1437       0       8     100200        0
           sctp_ep   1280      34      38         700       0     254      92160        0
        malloc-256    256     299      61        2250       0      62      92160        0
        malloc-256    256      25     335        2530       0      62      92160        0
       malloc-8192   8192       8       3         137       0       1      90112        0
          UMA Kegs    384     227       6         227       0      30      89472        0
        malloc-384    384      44     176         730       0      30      84480        0
            clpbuf   2624       0      32          33       0      16      83968        0
         filedesc0   1072      60      17        1438       0       8      82544        0
       malloc-4096   4096      18       0          18       0       2      73728        0
        malloc-128    128     516      42        3924       0     126      71424        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       0       2         130       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
        sctp_raddr    736      47      41         411       0     254      64768        0
       malloc-4096   4096      13       2          28       0       2      61440        0
       malloc-2048   2048      11      19        1044       0       8      61440        0
       malloc-1024   1024      34      26         271       0      16      61440        0
             g_bio    408       0     140        5644       0      30      57120        0
         malloc-64     64     582     300        1629       0     254      56448        0
        malloc-384    384      72      58        1024       0      30      49920        0
         malloc-64     64     583     173        2218       0     254      48384        0
         32 Bucket    256      53     127        8186       0      62      46080        0
         64 Bucket    512      68      20        2823       0      30      45056        0
       malloc-8192   8192       5       0           5       0       1      40960        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4692     428        4848       0     254      40960        0
           DIRHASH   1024      34       2          34       0      16      36864        0
             NAMEI   1024       0      36       16688       0      16      36864        0
      malloc-32768  32768       1       0           1       0       1      32768        0
           pcpu-64     64     487      25         487       0     254      32768        0
             tcpcb   1080       5      23         304       0     254      30240        0
       malloc-4096   4096       7       0           7       0       2      28672        0
       malloc-2048   2048       7       7          31       0       8      28672        0
         TURNSTILE    136     177      33         177       0      62      28560        0
             KNOTE    160      28     147       49050       0      62      28000        0
         tcp_inpcb    496       5      51         304       0     254      27776        0
        malloc-128    128     157      60         835       0     126      27776        0
        malloc-256    256      57      48         758       0      62      26880        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-8192   8192       2       1           4       0       1      24576        0
       malloc-1024   1024      18       6          25       0      16      24576        0
         malloc-64     64     130     248       32492       0     254      24192        0
            ttyinq    160     135      15         300       0      62      24000        0
             Files     80     227      73        9574       0     126      24000        0
          8 Bucket     80      41     259        1245       0     126      24000        0
           ttyoutq    256      72      18         160       0      62      23040        0
            da_ccb    544       0      42        1527       0      16      22848        0
       tcp_bbr_pcb    832       0      27         167       0      16      22464        0
              pipe    744      22       8         329       0      16      22320        0
               PWD     32      20     610         659       0     254      20160        0
      vtnet_tx_hdr     24       0     835      488311       0     254      20040        0
        SLEEPQUEUE     88     177      47         177       0     126      19712        0
       Mountpoints   2752       2       5           2       0       4      19264        0
        malloc-384    384      34      16          34       0      30      19200        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-4096   4096       1       3         748       0       2      16384        0
       malloc-2048   2048       4       4          19       0       8      16384        0
       malloc-2048   2048       3       5         112       0       8      16384        0
       malloc-1024   1024      13       3          13       0      16      16384        0
         malloc-64     64      84     168       16447       0     254      16128        0
         malloc-64     64     200      52         233       0     254      16128        0
         malloc-32     32     190     314        2047       0     254      16128        0
        malloc-128    128      78      46          92       0     126      15872        0
        sctp_chunk    152      62      42         192       0     254      15808        0
        malloc-256    256      27      33         260       0      62      15360        0
      tcp_rack_pcb    832       1      17          80       0      16      14976        0
       malloc-1024   1024       6       6           6       0      16      12288        0
        malloc-512    512       5      19         225       0      30      12288        0
        malloc-512    512       5      19          53       0      30      12288        0
         malloc-32     32     252     126         338       0     254      12096        0
         16 Bucket    144      48      36         345       0      62      12096        0
         malloc-16     16     591     159        2426       0     254      12000        0
     udplite_inpcb    496       0      24          92       0     254      11904        0
        malloc-128    128      65      28        1343       0     126      11904        0
              kenv    258      15      30        1035       0      30      11610        0
     routing nhops    256      27      18          34       0      62      11520        0
             unpcb    256      17      28        1242       0     254      11520        0
        malloc-384    384      22       8          24       0      30      11520        0
        malloc-256    256      34      11          45       0      62      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-2048   2048       4       0           4       0       8       8192        0
       malloc-1024   1024       1       7          24       0      16       8192        0
       malloc-1024   1024       7       1           7       0      16       8192        0
        malloc-512    512       8       8           9       0      30       8192        0
        malloc-512    512       4      12           7       0      30       8192        0
        malloc-512    512       8       8           8       0      30       8192        0
           rtentry    176      30      16          34       0      62       8096        0
             tcptw     88       0      92           4       0     254       8096        0
              PGRP     88      31      61          42       0     126       8096        0
          rl_entry     40      40     162          40       0     254       8080        0
   sctp_asconf_ack     48       2     166          14       0     254       8064        0
sctp_stream_msg_out    112       0      72          51       0     254       8064        0
      tcp_rack_map    112       2      70         183       0     126       8064        0
             udpcb     32       6     246         262       0     254       8064        0
              ertt     72       5     107         304       0     126       8064        0
         malloc-64     64      57      69          78       0     254       8064        0
         malloc-64     64       8     118          23       0     254       8064        0
         malloc-32     32      30     222         509       0     254       8064        0
         malloc-32     32     163      89         287       0     254       8064        0
         malloc-32     32      96     156        3774       0     254       8064        0
         malloc-32     32      51     201         652       0     254       8064        0
         malloc-32     32       0     252           5       0     254       8064        0
          4 Bucket     48       5     163          65       0     254       8064        0
          2 Bucket     32      47     205         587       0     254       8064        0
         malloc-16     16       2     498        1490       0     254       8000        0
         malloc-16     16       6     494           7       0     254       8000        0
         malloc-16     16      24     476          62       0     254       8000        0
         malloc-16     16      34     466       25666       0     254       8000        0
         malloc-16     16       7     493         143       0     254       8000        0
         malloc-16     16      75     425        1038       0     254       8000        0
             ripcb    496       4      12          37       0     254       7936        0
         udp_inpcb    496       6      10         170       0     254       7936        0
        malloc-128    128      12      50          28       0     126       7936        0
        malloc-384    384       0      20          31       0      30       7680        0
        malloc-256    256       2      28        1057       0      62       7680        0
        malloc-256    256      13      17         280       0      62       7680        0
     FPU_save_area    832       1       8           1       0      16       7488        0
            cpuset    104       8      54           8       0     126       6448        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
       malloc-4096   4096       1       0           1       0       2       4096        0
       malloc-4096   4096       0       1           2       0       2       4096        0
       malloc-2048   2048       2       0           2       0       8       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
        sctp_laddr     48      19      65         239       0     254       4032        0
         hostcache     64       1      62           1       0     254       4032        0
          syncache    168       0      24           4       0     254       4032        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        malloc-384    384       1       9           1       0      30       3840        0
        malloc-384    384       3       7           3       0      30       3840        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      12      27          14       0       0       3744        0
              vmem   1856       1       1           1       0       8       3712        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
           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
       sctp_asconf     40       0       0           0       0     254          0        0
        sctp_readq    152       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    312       0       0           0       0     254          0        0
           pf tags    104       0       0           0       0     126          0        0
          pf mtags     48       0       0           0       0     254          0        0
      tcp_log_node    120       0       0           0       0     126          0        0
    tcp_log_bucket    176       0       0           0       0      62          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
               ipq     56       0       0           0       0     254          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
            itimer    352       0       0           0       0      30          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    592       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
         domainset     40       0       0           0       0     254          0        0
        MAC labels     40       0       0           0       0     254          0        0
            vnpbuf   2624       0       0           0       0      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-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-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
      malloc-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
       malloc-2048   2048       0       0           0       0       8          0        0
       malloc-1024   1024       0       0           0       0      16          0        0
        malloc-512    512       0       0           0       0      30          0        0
           pcpu-32     32       0       0           0       0     254          0        0
            pcpu-4      4       0       0           0       0     254          0        0
            fakepg    104       0       0           0       0     126          0        0
          UMA Hash    256       0       0           0       0      62          0        0

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/11 10:06 freebsd-src 67f508db84b8 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 2-byte read in sctp_chunk_output
2021/07/16 17:42 freebsd-src ae47eecf87b5 f115ae98 console log report ci-freebsd-main panic: ASan: Invalid access, 2-byte read in sctp_chunk_output
2021/08/22 03:03 freebsd-src efa485d5c390 b599f2fc console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_chunk_output
2021/08/29 23:52 freebsd-src d98954e22981 be2c130d console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_chunk_output
* Struck through repros no longer work on HEAD.