syzbot


panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add

Status: fixed on 2021/09/20 20:59
Reported-by: syzbot+e4368c3bde07cd2fb29f@syzkaller.appspotmail.com
Fix commit: 34b1efcea19d sctp: use a valid outstream when adding it to the scheduler
First crash: 576d, last: 540d

Sample crash report:
panic: ASan: Invalid access, 8-byte read at 0xfffffe00a739c010, UMAUseAfterFree(fd)
cpuid = 0
time = 1628537513
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe00577b1a70
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe00577b1bd0
vpanic() at vpanic+0x2c5/frame 0xfffffe00577b1cb0
panic() at panic+0xb5/frame 0xfffffe00577b1d70
__asan_load8_noabort() at __asan_load8_noabort+0x376/frame 0xfffffe00577b1e30
sctp_ss_fb_add() at sctp_ss_fb_add+0x16d/frame 0xfffffe00577b1e90
sctp_lower_sosend() at sctp_lower_sosend+0x7300/frame 0xfffffe00577b2380
sctp_sosend() at sctp_sosend+0x716/frame 0xfffffe00577b2620
sosend() at sosend+0x11e/frame 0xfffffe00577b2690
kern_sendit() at kern_sendit+0x58d/frame 0xfffffe00577b27f0
freebsd32_sendmsg() at freebsd32_sendmsg+0x559/frame 0xfffffe00577b29f0
ia32_syscall() at ia32_syscall+0x41f/frame 0xfffffe00577b2bf0
int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xfbffcf78
KDB: enter: panic
[ thread pid 3474 tid 103409 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x28eb95a(%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         0x6b32cd7082e7950d
rdx                    0x40001
rbx                          0
rsp         0xfffffe00577b1bb0
rbp         0xfffffe00577b1bd0
rsi                          0
rdi         0xfffffe0054187068
r8                         0x3
r9          0xfffffe00577b16e8
r10                          0
r11         0xfffffe00a768ec50
r12         0xfffffe00a768e740
r13         0xfffffe00577b1c01
r14         0xffffffff82c62380  .str.18
r15         0xffffffff82c62380  .str.18
rip         0xffffffff8179f9db  kdb_enter+0x6b
rflags                0x200046  kernload+0x46
kdb_enter+0x6b: movq    $0,0x28eb95a(%rip)
db> show proc
Process 3474 (syz-executor.0) at 0xfffffe00a777d000:
 state: NORMAL
 uid: 0  gids: 0, 0, 5
 parent: pid 787 at 0xfffffe009bf2ea70
 ABI: FreeBSD ELF32
 flag: 0x10080480  flag2: 0
 arguments: /root/syz-executor.0
 reaper: 0xfffffe0053d4f538 reapsubtree: 1
 sigparent: 20
 vmspace: 0xfffffe00a77829f0
   (map 0xfffffe00a77829f0)
   (map.pmap 0xfffffe00a7782ab0)
   (pmap 0xfffffe00a7782b10)
 threads: 2
103286                   s                                   syz-executor.0
103409                   Run     CPU 0                       syz-executor.0
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 3474   787   787     0  T       (threaded)                  syz-executor.0
103286                   s                                   syz-executor.0
103409                   Run     CPU 0                       syz-executor.0
 2508     1  2508    65  Ss      select  0xfffffe00a7690740  dhclient
 2503     1   788     0  S       uwait   0xfffffe00a5c15400  syz-executor.1
 2502     1   788     0  S       uwait   0xfffffe00a7441500  syz-executor.1
 2245     1  2245     0  Ss      select  0xfffffe00a7690ac0  dhclient
 2237     1  2237     0  Ss      select  0xfffffe00a7690840  dhclient
 2218     1  2218    65  Ss      select  0xfffffe009e4bdc40  dhclient
 2147     1   788     0  S       uwait   0xfffffe00a7441600  syz-executor.1
 2141     1   788     0  S       uwait   0xfffffe00a5d34100  syz-executor.1
 2132     1   788     0  S       umtxn   0xfffffe00a5d34300  syz-executor.1
 2130     1   788     0  S       uwait   0xfffffe009e35dd80  syz-executor.1
 2128     1   788     0  S       uwait   0xfffffe00a7441000  syz-executor.1
 2073     1   790     0  S       uwait   0xfffffe00a7441900  syz-executor.2
 2070     1   790     0  S       uwait   0xfffffe00a5d34980  syz-executor.2
 2067     1   790     0  S       uwait   0xfffffe009e96d300  syz-executor.2
 2065     1   790     0  S       uwait   0xfffffe009e96d800  syz-executor.2
 2063     1   790     0  S       uwait   0xfffffe00a5c15200  syz-executor.2
 1869     1  1869     0  Ss      select  0xfffffe009e4bd6c0  dhclient
 1866     1  1866     0  Ss      select  0xfffffe009e4bd7c0  dhclient
 1835     1  1835    65  Ss      select  0xfffffe00a74be4c0  dhclient
 1614     1  1614     0  Ss      select  0xfffffe009e96d040  dhclient
 1611     1  1611     0  Ss      select  0xfffffe00a74bef40  dhclient
 1592     1  1592    65  Ss      select  0xfffffe00a74410c0  dhclient
 1563     1   793     0  S       uwait   0xfffffe00a5d34000  syz-executor.3
 1562     1   788     0  S       uwait   0xfffffe00a5d34600  syz-executor.1
 1553     1   793     0  S       uwait   0xfffffe00a5d34800  syz-executor.3
 1552     1   788     0  S       uwait   0xfffffe00a5c15000  syz-executor.1
 1551     1   790     0  S       uwait   0xfffffe00a5d34700  syz-executor.2
 1550     1   787     0  S       uwait   0xfffffe00a5c15880  syz-executor.0
 1545     1   790     0  S       uwait   0xfffffe009e35db80  syz-executor.2
 1544     1   793     0  S       uwait   0xfffffe00a5d34b80  syz-executor.3
 1543     1   788     0  S       uwait   0xfffffe00a5c15780  syz-executor.1
 1541     1   787     0  S       uwait   0xfffffe00a5d34500  syz-executor.0
 1540     1   793     0  S       uwait   0xfffffe00a5d34400  syz-executor.3
 1535     1   790     0  S       uwait   0xfffffe00a5c15680  syz-executor.2
 1534     1   788     0  S       uwait   0xfffffe009e35dc80  syz-executor.1
 1532     1   787     0  S       uwait   0xfffffe00a5d34a80  syz-executor.0
 1531     1   793     0  S       uwait   0xfffffe00a5d34d80  syz-executor.3
 1528     1   788     0  S       uwait   0xfffffe00a5c15980  syz-executor.1
 1527     1   790     0  S       uwait   0xfffffe00a5c15100  syz-executor.2
 1524     1   787     0  S       uwait   0xfffffe00a5c15c80  syz-executor.0
 1522     1   793     0  S       uwait   0xfffffe00a5c15300  syz-executor.3
 1521     1   790     0  S       uwait   0xfffffe00a5c15d80  syz-executor.2
 1520     1   788     0  S       uwait   0xfffffe009e4bd880  syz-executor.1
 1515     1   787     0  S       uwait   0xfffffe009e96d500  syz-executor.0
 1512     1   790     0  S       uwait   0xfffffe009e96de00  syz-executor.2
 1506     1   787     0  S       uwait   0xfffffe0058842680  syz-executor.0
 1504     1   787     0  S       uwait   0xfffffe00a5c15b80  syz-executor.0
 1499     1   787     0  S       uwait   0xfffffe009e96d200  syz-executor.0
 1468     1   790     0  T                                   syz-executor.2
 1459     1   790     0  T                                   syz-executor.2
 1250     0     0     0  DL      aiordy  0xfffffe00a5c17000  [aiod4]
 1249     0     0     0  DL      aiordy  0xfffffe00a5c38538  [aiod3]
 1248     0     0     0  DL      aiordy  0xfffffe009e9d0a70  [aiod2]
 1247     0     0     0  DL      aiordy  0xfffffe00a5c38a70  [aiod1]
 1141     1  1141     0  Ss      select  0xfffffe00a5c15e40  dhclient
 1138     1  1138     0  Ss      select  0xfffffe009e4bdac0  dhclient
  793   780   793     0  Ss      piperd  0xfffffe00588f9ba0  syz-executor.3
  790   780   790     0  Ss      piperd  0xfffffe005887cba0  syz-executor.2
  788   780   788     0  Ss      piperd  0xfffffe009e4082e8  syz-executor.1
  787   780   787     0  Ss      wait    0xfffffe009bf2ea70  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100115                   S       uwait   0xfffffe009e35d580  syz-fuzzer
100116                   S       uwait   0xfffffe009e35d680  syz-fuzzer
100117                   S       uwait   0xfffffe0058842180  syz-fuzzer
100118                   S       uwait   0xfffffe0058842280  syz-fuzzer
100119                   S       uwait   0xfffffe0058842380  syz-fuzzer
100120                   S       uwait   0xfffffe0058842480  syz-fuzzer
100121                   S       uwait   0xfffffe0058842580  syz-fuzzer
100123                   S       kqread  0xfffffe009bf05a00  syz-fuzzer
100127                   S       uwait   0xfffffe009e96df00  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffffe00588775e8  csh
  776   694   776     0  Ss      select  0xfffffe009e35d040  sshd
  760     1   760     0  Ss+     ttyin   0xfffffe0056fe2cb0  getty
  759     1   759     0  Ss+     ttyin   0xfffffe00575fc8b0  getty
  758     1   758     0  Ss+     ttyin   0xfffffe00575fccb0  getty
  757     1   757     0  Ss+     ttyin   0xfffffe00583e10b0  getty
  756     1   756     0  Ss+     ttyin   0xfffffe00583e14b0  getty
  755     1   755     0  Ss+     ttyin   0xfffffe00583e18b0  getty
  754     1   754     0  Ss+     ttyin   0xfffffe00583e1cb0  getty
  753     1   753     0  Ss+     ttyin   0xfffffe005752d0b0  getty
  752     1   752     0  Ss+     ttyin   0xfffffe005752d4b0  getty
  698     1   698     0  Ss      nanslp  0xffffffff84058201  cron
  694     1   694     0  Ss      select  0xfffffe0058842ac0  sshd
  507     1   507     0  Ss      select  0xfffffe0058842ec0  syslogd
  436     1   436     0  Ss      select  0xfffffe0056ff8040  devd
  435     1   435    65  Ss      select  0xfffffe0058842bc0  dhclient
  350     1   350     0  Ss      select  0xfffffe0056ff8b40  dhclient
  347     1   347     0  Ss      select  0xfffffe0058842b40  dhclient
   23     0     0     0  DL      vlruwt  0xfffffe0058511000  [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]
100099                   D       sdflush 0xfffffe0058917ce8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff841b6640  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100083                   D       psleep  0xffffffff841aa178  [dom0]
100089                   D       launds  0xffffffff841aa184  [laundry: dom0]
100090                   D       umarcl  0xffffffff81e9a850  [uma]
   18     0     0     0  DL      -       0xffffffff83e0f320  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff8499e460  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff84d16e20  [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  WL      (threaded)                  [intr]
100012                   I                                   [swi6: task queue]
100013                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100032                   I                                   [swi4: clock (0)]
100033                   I                                   [swi4: clock (1)]
100034                   I                                   [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                   Run     CPU 1                       [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffffe0053d4f538  [init]
   10     0     0     0  DL      audit_w 0xffffffff841a51c0  [audit]
    0     0     0     0  DLs     (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                   D       -       0xfffffe0053de6500  [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       -       0xffffffff82c69300  [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 3474 (syz-executor.0) thread 0xfffffe00a768e740 (103409)
exclusive sleep mutex sctp-send-tcb (tcbs) r = 0 (0xfffffe00a72b3c90) locked @ /syzkaller/managers/i386/kernel/sys/netinet/sctp_output.c:13129
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4338K         4244
          tcp_hpts            6         3201K            6
         sctp_stro           60         2111K         1513
         sysctloid        34332         2028K        34402
             vtbuf           24         1968K           46
              kobj          326         1304K          485
            newblk            5         1025K         5589
          vfscache            3         1025K            3
          filedesc           92          730K         4999
               pcb          150          674K         6920
          inodedep           21          520K         2722
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          222          461K         3603
              vmem            3          274K            5
            acpica         1674          184K        55752
         vnet_data            1          168K            1
           tidhash            3          141K            3
            linker          356          140K          396
           pagedep            9          130K         2479
        tfo_ccache            1          128K            1
            DEVFS1          107          107K          124
               sem            4          106K            4
               BPF           46           88K           60
               bus          984           80K         3475
          mtx_pool            2           72K            2
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          509           64K          509
           kdtrace          299           56K         6910
              umtx          440           55K          440
         sctp_atcl          121           46K         4908
               shm            6           42K           11
              temp           35           33K         2723
         hostcache            1           32K            1
            DEVFS3          126           32K          136
               msg            4           30K            4
        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
          routetbl          139           17K          555
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           33           14K         1692
           lltable           44           14K          115
            DEVFSP          210           14K          648
       ether_multi          157           13K          167
            KTRACE          100           13K          100
             ifnet            7           13K            7
              ksem           31           12K           54
              kenv           95           12K           95
      eventhandler          133           12K          133
         CAM queue            5           11K         1528
              GEOM           61           10K          489
              rman           84           10K          425
         in6_multi           71            9K           71
            kqueue          106            9K         3514
         sctp_timw           34            9K           34
         bmsafemap            2            9K         2738
             xform          132            9K          816
              UART           12            9K           12
           devstat            4            9K            4
               rpc            2            8K            2
             shmfd            1            8K           41
       pfs_vncache            1            8K            1
         sctp_atky          181            8K         6751
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          295
         taskqueue           63            7K           63
              cred           26            7K          269
           pwddesc          104            7K         3499
            sglist            5            7K            5
           CAM DEV            3            6K          510
            plimit           24            6K          449
          pf_ifnet           12            5K           66
       ufs_dirhash           24            5K           24
               UMA          270            5K          270
           session           35            5K           51
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
          kcovinfo           64            4K           68
           acpisem           28            4K           28
             selfd           55            4K        50974
             lockf           32            4K           57
             hhook           15            4K           17
            dirrem           12            3K         2609
         proc-args           52            3K          687
          terminal           11            3K           11
            select           19            3K           69
           uidinfo            3            3K           17
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
         sctp_athm          121            2K         5115
          sctp_map          120            2K         3004
            ip6ndp           12            2K           15
          sctp_ifa           14            2K           15
            Unitno           29            2K           47
           CAM XPT           22            2K          543
          freefile           12            2K         2567
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
               tun            7            2K            7
             mount           22            2K           99
           softdep            1            1K            1
             mkdir            8            1K         4918
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K           48
      NFSD session            1            1K            1
           pf_osfp            8            1K            8
        CAM periph            4            1K          271
             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
          pci_link           10            1K           10
            crypto            4            1K          192
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               pmc            1            1K            1
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              cpus            2            1K            2
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               iov            1            1K        17474
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            statfs            0            0K         2676
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tiDeviceHandle_t * malloc            0            0K            0
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ag_device_t malloc            0            0K            0
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320     965      724607       0     254   38031360        0
           tcp_log    416       0   20007      147686       0     254    8322912        0
              mbuf    256    9980    2425     1578504       0     254    3175680        0
              pbuf   2624       0     989           0       0       2    2595136        0
          BUF TRIE    144     186   11574        3328       0      62    1693440        0
        malloc-384    384    4307      13        4660       0      30    1658880        0
        RADIX NODE    144   10727     272      102446       0      62    1583856        0
        malloc-128    128   11304     321       16804       0     126    1488000        0
      mbuf_cluster   2048     690       2         690       0     254    1417216        0
       malloc-4096   4096     326       4         567       0       2    1351680        0
       UMA Slabs 0    112   10774      23       10774       0     126    1209264        0
         vmem btag     56   19910      81       19910       0     254    1119496        0
       tcp_bbr_map    128       0    7440      169109       0     126     952320        0
      malloc-16384  16384      50       7        2677       0       1     933888        0
         FFS inode   1160     552      29        3119       0       8     673960        0
    ertt_txseginfo     40       0   16564      426885       0     254     662560        0
        256 Bucket   2048     306       8       18449       0       8     643072        0
       malloc-4096   4096     112       8        4124       0       2     491520        0
         VM OBJECT    264    1731     114       51869       0      30     487080        0
            THREAD   1808     194      26        3424       0       8     397760        0
      malloc-65536  65536       4       2         384       0       1     393216        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
         MAP ENTRY     96    3641     433      195895       0     126     391104        0
         sctp_asoc   2288      60      75        1502       0     254     308880        0
             VNODE    448     590      85        3159       0      30     302400        0
       malloc-2048   2048      65      71        3359       0       8     278528        0
         malloc-64     64    4147      74        7590       0     254     270144        0
        sctp_chunk    152     639    1025        2242       0     254     252928        0
           VMSPACE   2544      77      13        3464       0       4     228960        0
         malloc-16     16   14032     218       14141       0     254     228000        0
           sctp_ep   1280      61     116        3164       0     254     226560        0
            DEVCTL   1024       0     220         154       0       0     225280        0
        malloc-256    256     281     514        7050       0      62     203520        0
      malloc-65536  65536       1       2          49       0       1     196608        0
      malloc-32768  32768       0       6         978       0       1     196608        0
         UMA Zones    768     242       2         242       0      16     187392        0
         malloc-32     32    5326     344        6434       0     254     181440        0
       mbuf_packet    256      75     615       12667       0     254     176640        0
      malloc-32768  32768       0       5           5       0       1     163840        0
        malloc-128    128    1235      36       26183       0     126     162688        0
            socket    944      44     124        5588       0     254     158592        0
              PROC   1336     103      14        3484       0       8     156312        0
       malloc-1024   1024     123      25        2118       0      16     151552        0
       FFS2 dinode    256     552      33        3119       0      62     149760        0
       S VFS Cache    104    1026     339        3702       0     126     141960        0
         filedesc0   1072     104      22        3499       0       8     135072        0
        128 Bucket   1024     115      16        2358       0      16     134144        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       1       1           9       0       1     131072        0
       malloc-1024   1024      60      68        1527       0      16     131072        0
        malloc-256    256     336     144        7029       0      62     122880        0
        malloc-128    128     898      32        2215       0     126     119040        0
          ksiginfo    112     104     940        2188       0     126     116928        0
        malloc-384    384      54     246        2909       0      30     115200        0
        sctp_raddr    736      60      94        1730       0     254     113344        0
        malloc-256    256      35     385       10266       0      62     107520        0
        malloc-384    384     122     148        4909       0      30     103680        0
       malloc-8192   8192       8       4         137       0       1      98304        0
       malloc-4096   4096      22       0          22       0       2      90112        0
          UMA Kegs    384     227       6         227       0      30      89472        0
             g_bio    408       0     200       25478       0      30      81600        0
        malloc-128    128     516      73        4137       0     126      75392        0
         malloc-64     64     844     290        2519       0     254      72576        0
         64 Bucket    512      86      50        4662       0      30      69632        0
             Files     80     398     452       16458       0     126      68000        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       0       2         134       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
       malloc-2048   2048      11      21        1047       0       8      65536        0
       malloc-4096   4096      13       2          29       0       2      61440        0
        malloc-256    256      84     126        3222       0      62      53760        0
             tcpcb   1080       4      45         659       0     254      52920        0
         32 Bucket    256      67     128        9210       0      62      49920        0
         malloc-64     64     605     151        4089       0     254      48384        0
        malloc-256    256       2     178        4848       0      62      46080        0
         malloc-64     64     183     510       54569       0     254      44352        0
            clpbuf   2624       0      16          20       0      16      41984        0
       malloc-8192   8192       5       0           5       0       1      40960        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4746     374        6028       0     254      40960        0
           DIRHASH   1024      34       2          34       0      16      36864        0
             NAMEI   1024       0      36       26329       0      16      36864        0
            da_ccb    544       0      63        6481       0      16      34272        0
         TURNSTILE    136     221      31         221       0      62      34272        0
      malloc-32768  32768       1       0           1       0       1      32768        0
           pcpu-64     64     487      25         487       0     254      32768        0
       malloc-4096   4096       7       0           7       0       2      28672        0
       malloc-2048   2048       7       7          31       0       8      28672        0
         16 Bucket    144      66     130         577       0      62      28224        0
             KNOTE    160      28     147       68471       0      62      28000        0
         tcp_inpcb    496       4      52         659       0     254      27776        0
        malloc-128    128     159      58        2728       0     126      27776        0
              pipe    744      23      12         404       0      16      26040        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-8192   8192       2       1           4       0       1      24576        0
       malloc-4096   4096       1       5        2680       0       2      24576        0
       malloc-1024   1024      18       6          65       0      16      24576        0
               PWD     32      54     702        2557       0     254      24192        0
         malloc-32     32     228     528        4026       0     254      24192        0
            ttyinq    160     135      15         300       0      62      24000        0
          8 Bucket     80      52     248        1376       0     126      24000        0
           ttyoutq    256      72      18         160       0      62      23040        0
        SLEEPQUEUE     88     221      35         221       0     126      22528        0
       tcp_bbr_pcb    832       0      27         419       0      16      22464        0
      tcp_rack_pcb    832       0      27          98       0      16      22464        0
         malloc-64     64     129     186       19918       0     254      20160        0
         malloc-16     16     645     605        4997       0     254      20000        0
       Mountpoints   2752       2       5           2       0       4      19264        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-2048   2048       4       4         218       0       8      16384        0
       malloc-2048   2048       4       4          22       0       8      16384        0
       malloc-2048   2048       3       5         182       0       8      16384        0
       malloc-2048   2048       2       6          32       0       8      16384        0
       malloc-2048   2048       5       3          10       0       8      16384        0
       malloc-1024   1024      13       3          13       0      16      16384        0
        sctp_laddr     48      20     316        1082       0     254      16128        0
         malloc-64     64     203      49         243       0     254      16128        0
         malloc-32     32     151     353        7551       0     254      16128        0
      vtnet_tx_hdr     24       0     668      574769       0     254      16032        0
         udp_inpcb    496       6      26         283       0     254      15872        0
        malloc-128    128      87      37         152       0     126      15872        0
        malloc-128    128      71      53        5159       0     126      15872        0
        malloc-384    384      24      16          26       0      30      15360        0
        malloc-384    384      34       6          34       0      30      15360        0
        malloc-256    256      36      24          82       0      62      15360        0
        malloc-256    256      28      32         383       0      62      15360        0
       malloc-1024   1024       6       6           6       0      16      12288        0
       malloc-1024   1024       7       5          17       0      16      12288        0
        malloc-512    512       5      19         241       0      30      12288        0
      tcp_rack_map    112       0     108         186       0     126      12096        0
         malloc-32     32     252     126         338       0     254      12096        0
          2 Bucket     32      57     321        1042       0     254      12096        0
             ripcb    496       5      19          64       0     254      11904        0
     udplite_inpcb    496       0      24          84       0     254      11904        0
              kenv    258      15      30        1042       0      30      11610        0
     routing nhops    256      27      18          35       0      62      11520        0
             unpcb    256      22      23        1291       0     254      11520        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-1024   1024       1       7          35       0      16       8192        0
        malloc-512    512       0      16           5       0      30       8192        0
        malloc-512    512       8       8           9       0      30       8192        0
        malloc-512    512       1      15         445       0      30       8192        0
        malloc-512    512      10       6          24       0      30       8192        0
           rtentry    176      31      15          35       0      62       8096        0
             tcptw     88       0      92           7       0     254       8096        0
              PGRP     88      35      57          51       0     126       8096        0
          rl_entry     40      98     104         102       0     254       8080        0
sctp_stream_msg_out    112      12      60         362       0     254       8064        0
          sackhole     32       0     252           3       0     254       8064        0
             udpcb     32       6     246         367       0     254       8064        0
              AIOP     32       4     248           4       0     254       8064        0
              ertt     72       4     108         659       0     126       8064        0
         malloc-64     64      59      67          88       0     254       8064        0
         malloc-64     64       8     118          12       0     254       8064        0
         malloc-32     32      32     220        2356       0     254       8064        0
         malloc-32     32     181      71         339       0     254       8064        0
         malloc-32     32      52     200        1144       0     254       8064        0
         malloc-32     32       0     252          17       0     254       8064        0
          4 Bucket     48       6     162         119       0     254       8064        0
         malloc-16     16       2     498        4581       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      33     467       26039       0     254       8000        0
         malloc-16     16       7     493         121       0     254       8000        0
         malloc-16     16     125     375        5120       0     254       8000        0
        malloc-128    128      13      49          40       0     126       7936        0
        sctp_readq    152       0      52         147       0     254       7904        0
               AIO    208       0      38           8       0      62       7904        0
           cryptop    280       0      28          23       0      30       7840        0
             AIOCB    552       0      14          10       0      16       7728        0
        malloc-384    384       0      20          44       0      30       7680        0
        malloc-384    384       1      19          21       0      30       7680        0
        malloc-256    256      14      16         281       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-512    512       1       7           1       0      30       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
        malloc-512    512       4       4           7       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
         hostcache     64       2      61           2       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       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_ack     48       0       0           0       0     254          0        0
       sctp_asconf     40       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
               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
           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
  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-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-1024   1024       0       0           0       0      16          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 (22):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-freebsd-i386 2021/08/09 19:32 freebsd-src 6bddade6114a 6972b106 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/07 23:17 freebsd-src 5668a155cbe6 6972b106 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/05 10:19 freebsd-src f3a3b0612169 7f7bb950 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/04 19:32 freebsd-src 21d854658801 b97d64c9 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/04 07:44 freebsd-src e94f1a0a37fd 6c236867 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/03 20:12 freebsd-src 30e1773fdef4 6c236867 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/03 05:26 freebsd-src 04cc0c393c31 6c236867 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/31 22:47 freebsd-src ff01d6343f1f 6c236867 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/31 08:11 freebsd-src f7f76c200a8c 6c236867 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/31 01:38 freebsd-src 0943200b1308 6c236867 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/27 17:35 freebsd-src 85ae35ef37c0 17d6ab15 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/24 15:53 freebsd-src 47aeda7b7055 4d1b57d4 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/22 14:05 freebsd-src d6ed0d3d3106 241790bb console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/22 09:50 freebsd-src 5ab82b00cca7 29c3f20f console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/19 17:52 freebsd-src db0f26439357 e6a17580 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/18 16:51 freebsd-src 8cdb4491c90d f115ae98 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/18 13:19 freebsd-src 8cdb4491c90d f115ae98 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/15 19:31 freebsd-src 65788dae3117 a44e4957 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/15 16:34 freebsd-src 65788dae3117 a44e4957 console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/12 22:52 freebsd-src 9c1c02093b90 f415556d console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/07/10 03:34 freebsd-src 63ca9ea4f34d 8f5a7b8c console log report panic: ASan: Invalid access, 8-byte read in sctp_ss_fb_add
ci-freebsd-i386 2021/08/14 13:11 freebsd-src 34f620f1d0cf 2489ab88 console log report panic: ASan: Invalid access, NUM-byte read in sctp_ss_fb_add
* Struck through repros no longer work on HEAD.