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

Status: fixed on 2021/09/01 18:06
Reported-by: syzbot+1d0f2c4675de76a4cf1e@syzkaller.appspotmail.com
Fix commit: d35be50f5779 sctp: Hold association locks across socket wakeups when freeing
First crash: 1865d, last: 1812d
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
freebsd panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc 2 3 1741d 1812d 0/2 auto-closed as invalid on 2022/02/10 06:22

Sample crash report:
panic: ASan: Invalid access, 8-byte read at 0xfffffe00a7237b80, UMAUseAfterFree(fd)
cpuid = 0
time = 1628766141
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0xc7/frame 0xfffffe0053b5e4f0
kdb_backtrace() at kdb_backtrace+0xd3/frame 0xfffffe0053b5e650
vpanic() at vpanic+0x2c5/frame 0xfffffe0053b5e730
panic() at panic+0xb5/frame 0xfffffe0053b5e7f0
__asan_load8_noabort() at __asan_load8_noabort+0x376/frame 0xfffffe0053b5e8b0
sctp_free_assoc() at sctp_free_assoc+0x3908/frame 0xfffffe0053b5e9f0
sctp_express_handle_sack() at sctp_express_handle_sack+0x2b8e/frame 0xfffffe0053b5ec30
sctp_process_control() at sctp_process_control+0x53db/frame 0xfffffe0053b5f300
sctp_common_input_processing() at sctp_common_input_processing+0xb26/frame 0xfffffe0053b5f560
sctp6_input_with_port() at sctp6_input_with_port+0x5a1/frame 0xfffffe0053b5f730
sctp6_input() at sctp6_input+0x1f/frame 0xfffffe0053b5f750
ip6_input() at ip6_input+0x2531/frame 0xfffffe0053b5f9b0
swi_net() at swi_net+0x2e5/frame 0xfffffe0053b5fa50
ithread_loop() at ithread_loop+0x4f1/frame 0xfffffe0053b5fbb0
fork_exit() at fork_exit+0xd0/frame 0xfffffe0053b5fbf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0053b5fbf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100034 ]
Stopped at      kdb_enter+0x6b: movq    $0,0x28eaf9a(%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         0x4609a67db7ccc955
rdx                        0x1
rbx                          0
rsp         0xfffffe0053b5e630
rbp         0xfffffe0053b5e650
rsi                          0
rdi         0xffffffff817ac9e9  vprintf+0x319
r8                         0x3
r9          0xfffffe0053b5e168
r10                          0
r11                       0xbf
r12         0xfffffe0053e231e0
r13         0xfffffe0053b5e601
r14         0xffffffff82c62520  .str.18
r15         0xffffffff82c62520  .str.18
rip         0xffffffff817a039b  kdb_enter+0x6b
rflags                    0x46
kdb_enter+0x6b: movq    $0,0x28eaf9a(%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                   Run     CPU 0                       [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
 3635   786   786     0  RE                                  syz-executor.2
 3168     1   787     0  S       uwait   0xfffffe009e9a7800  syz-executor.3
 3167     1   782     0  S       uwait   0xfffffe00a6e60f00  syz-executor.0
 3166     1   783     0  S       uwait   0xfffffe009e9a7d80  syz-executor.1
 3160     1   787     0  S       uwait   0xfffffe00a3c21f00  syz-executor.3
 3158     1   783     0  S       uwait   0xfffffe00a3c25380  syz-executor.1
 3156     1   782     0  S       uwait   0xfffffe00a3c21300  syz-executor.0
 3155     1   787     0  S       uwait   0xfffffe009e9a7000  syz-executor.3
 3151     1   782     0  S       uwait   0xfffffe00a3c25e80  syz-executor.0
 3150     1   783     0  S       uwait   0xfffffe00a3c21d00  syz-executor.1
 3146     1   782     0  S       uwait   0xfffffe00a3c25580  syz-executor.0
 3145     1   782     0  S       uwait   0xfffffe00a3c25180  syz-executor.0
 3084     0     0     0  DL      aiordy  0xfffffe009e380a70  [aiod4]
 3083     0     0     0  DL      aiordy  0xfffffe00a7127a70  [aiod3]
 3082     0     0     0  DL      aiordy  0xfffffe009e9e0000  [aiod2]
 3081     0     0     0  DL      aiordy  0xfffffe009e3fe000  [aiod1]
 2189     1  2189    65  Ss      select  0xfffffe00a7231d40  dhclient
 1846     1  1846     0  Ss      select  0xfffffe00a6e605c0  dhclient
 1843     1  1843     0  Ss      select  0xfffffe00a7231ec0  dhclient
 1824     1  1824    65  Ss      select  0xfffffe00a7231f40  dhclient
 1582     1  1582     0  Ss      select  0xfffffe00a6e607c0  dhclient
 1578     1  1578     0  Ss      select  0xfffffe00a6e60640  dhclient
 1553     1  1553    65  Ss      select  0xfffffe00a6e60840  dhclient
 1443     1  1443     0  Ss      select  0xfffffe00a6e608c0  dhclient
 1439     1  1439     0  Ss      select  0xfffffe00a6e609c0  dhclient
 1420     1  1420    65  Ss      select  0xfffffe00a3c212c0  dhclient
 1067     1  1067     0  Ss      select  0xfffffe00a3c25dc0  dhclient
 1063     1  1063     0  Ss      select  0xfffffe00a3c213c0  dhclient
  787   780   787     0  Rs                                  syz-executor.3
  786   780   786     0  Ss      wait    0xfffffe009e980000  syz-executor.2
  783   780   783     0  Ss      piperd  0xfffffe00588802e8  syz-executor.1
  782   780   782     0  Ss      piperd  0xfffffe009e976ba0  syz-executor.0
  780   778   778     0  S       (threaded)                  syz-fuzzer
100114                   S       uwait   0xfffffe0058906e80  syz-fuzzer
100120                   S       uwait   0xfffffe009e4b2c80  syz-fuzzer
100121                   S       uwait   0xfffffe009e4b2d80  syz-fuzzer
100122                   S       uwait   0xfffffe009e4b2e80  syz-fuzzer
100123                   S       uwait   0xfffffe0058906000  syz-fuzzer
100124                   S       uwait   0xfffffe00584afd00  syz-fuzzer
100125                   S       uwait   0xfffffe00584afe00  syz-fuzzer
100126                   S       kqread  0xfffffe009e445c00  syz-fuzzer
100128                   S       uwait   0xfffffe0058906100  syz-fuzzer
  778   776   778     0  Ss      pause   0xfffffe009e4565e8  csh
  776   694   776     0  Ss      select  0xfffffe009e4b23c0  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  0xfffffe00589063c0  sshd
  507     1   507     0  Ss      select  0xfffffe0058906440  syslogd
  436     1   436     0  Ss      select  0xfffffe00589064c0  devd
  435     1   435    65  Ss      select  0xfffffe005883cc40  dhclient
  350     1   350     0  Ss      select  0xfffffe0058906cc0  dhclient
  347     1   347     0  Ss      select  0xfffffe00584af240  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]
100098                   D       sdflush 0xfffffe0058913ce8  [/ 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  0xffffffff81e9b470  [uma]
   18     0     0     0  DL      -       0xffffffff83e0f320  [rand_harvestq]
   17     0     0     0  DL      waiting 0xffffffff84cfe460  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff849afe20  [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                   Run     CPU 0                       [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                   RunQ                                [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       -       0xffffffff82c694a0  [deadlkres]
100077                   D       -       0xfffffe0056a42900  [acpi_task_0]
100078                   D       -       0xfffffe0056a42900  [acpi_task_1]
100079                   D       -       0xfffffe0056a42900  [acpi_task_2]
100081                   D       -       0xfffffe0056a42700  [CAM taskq]
 3631   787   787     0  Z                                   syz-executor.3
db> show all locks
Process 12 (intr) thread 0xfffffe0053dfb020 (100032)
shared rw vnet_rwlock (vnet_rwlock) r = 0 (0xffffffff841849c0) locked @ /syzkaller/managers/main/kernel/sys/netinet/ip_input.c:857
Process 12 (intr) thread 0xfffffe0053e231e0 (100034)
exclusive sleep mutex sctp-send-tcb (tcbs) r = 0 (0xfffffe00a7225c90) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4841
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe00a7225c70) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4840
exclusive rw sctp-info (sctp-info) r = 0 (0xfffffe00081ae7e0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:4838
Process 0 (kernel) thread 0xfffffe0053df13a0 (100014)
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            5         1025K         7619
          vfscache            3         1025K            3
               pcb           51          556K         6508
          inodedep            9          515K         2975
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          164          337K         3725
              vmem            3          274K            5
          filedesc           34          265K         5273
            acpica         1674          184K        55752
         vnet_data            1          168K            1
           tidhash            3          141K            3
            linker          356          140K          396
           pagedep            9          130K         2663
        tfo_ccache            1          128K            1
            DEVFS1          107          107K          124
               sem            4          106K            4
               BPF           46           88K           50
               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
              umtx          374           47K          374
           kdtrace          242           47K         7999
              temp           35           33K         2619
         hostcache            1           32K            1
               shm            1           32K            8
            DEVFS3          126           32K          136
               msg            4           30K            4
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
            ifaddr           70           20K           72
        DEVFS_RULE           56           20K           56
         ufs_mount            4           17K            5
              proc            3           17K            3
          routetbl          131           17K          415
               tty           16           16K           16
           ithread           99           16K           99
           lltable           47           15K          118
            bus-sc           33           14K         1692
            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
              cred           40           10K          386
              GEOM           61           10K          489
              rman           84           10K          425
         in6_multi           65            9K           65
         bmsafemap            2            9K         2978
              UART           12            9K           12
           devstat            4            9K            4
         sctp_timw           32            8K           32
              ksem            1            8K           47
               rpc            2            8K            2
             shmfd            1            8K           44
       pfs_vncache            1            8K            1
         pfs_nodes           20            8K           20
     audit_evclass          237            8K          295
            kqueue           78            7K         3662
         taskqueue           63            7K           63
            sglist            5            7K            5
         sctp_atcl           16            6K         4038
         sctp_stro            6            6K         1152
           CAM DEV            3            6K          510
            plimit           24            6K          516
            DEVFSP           80            5K          587
       ufs_dirhash           24            5K           24
           pwddesc           74            5K         3650
          pf_ifnet           11            5K           27
               UMA          270            5K          270
           session           35            5K           54
                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        44679
             lockf           32            4K           60
             hhook           15            4K           17
         proc-args           52            3K          704
          terminal           11            3K           11
            select           19            3K          137
           uidinfo            4            3K           25
        local_apic            1            2K            1
           io_apic            1            2K            1
       fpukern_ctx            2            2K            2
         ipsec-saq            2            2K            2
            ip6ndp           12            2K           14
          sctp_ifa           13            2K           14
            Unitno           27            2K           47
           CAM XPT           22            2K          543
          in_multi            6            2K            8
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
         sctp_atky           25            2K         5369
               msi            9            2K            9
       inpcbpolicy           36            2K         2251
             clone            9            2K            9
               tun            7            2K            7
           pf_osfp           10            2K           10
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
             nhops            6            1K            8
       vnodemarker            2            1K          114
      NFSD session            1            1K            1
        CAM periph            4            1K          271
             ipsec            3            1K            3
          sctp_ifn            6            1K           14
               mld            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K          281
          pci_link           10            1K           10
           tcp_fsb            5            1K          295
            crypto            4            1K          247
 encap_export_host           12            1K           12
          procdesc            5            1K           18
         newdirblk            4            1K         2620
             mkdir            4            1K         5240
            diradd            4            1K         2847
              pfil            4            1K            4
              cdev            2            1K            2
               osd           13            1K          930
    chacha20random            1            1K            1
         sctp_athm           16            1K         4107
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            vnodes            1            1K            1
           CAM SIM            2            1K            2
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db> show uma
              Zone   Size    Used    Free    Requests  Sleeps  Bucket  Total Mem    XFree
   mbuf_jumbo_page   4096    8320     987       31261       0     254   38121472        0
           tcp_log    416       0   18180      120726       0     254    7562880        0
              pbuf   2624       0     957           0       0       2    2511168        0
              mbuf    256    8841     729      588693       0     254    2449920        0
          BUF TRIE    144     352   11408        6080       0      62    1693440        0
        malloc-384    384    4277       3        4625       0      30    1643520        0
        malloc-128    128   11292     333       17237       0     126    1488000        0
        RADIX NODE    144    8038    1841      118384       0      63    1422576        0
       malloc-4096   4096     326       2         538       0       2    1343488        0
      mbuf_cluster   2048     615       1         615       0     254    1261568        0
       UMA Slabs 0    112   10620      33       10620       0     126    1193136        0
         vmem btag     56   18996      59       18996       0     254    1067080        0
       tcp_bbr_map    128       0    6510      135851       0     126     833280        0
         FFS inode   1160     529      31        3320       0       8     649600        0
    ertt_txseginfo     40       0   14948      399840       0     254     597920        0
        256 Bucket   2048     272      14       15472       0       8     585728        0
      malloc-16384  16384      21       7        2814       0       1     458752        0
         VM OBJECT    264    1399     131       54914       0      30     403920        0
      malloc-65536  65536       4       2         404       0       1     393216        0
            lkpimm    168       1    2327           1       0      62     391104        0
          lkpicurr    168       2    2326           2       0      62     391104        0
       malloc-4096   4096      84       6        4277       0       2     368640        0
            THREAD   1808     165      22        4361       0       8     338096        0
             VNODE    448     567      72        3360       0      30     286272        0
        malloc-256    256     279     786        9051       0      62     272640        0
         malloc-64     64    4119     102        7733       0     254     270144        0
         MAP ENTRY     96    2102     418      209374       0     126     241920        0
      malloc-32768  32768       0       7         172       0       1     229376        0
      malloc-32768  32768       0       7         690       0       1     229376        0
         malloc-16     16   14032     218       14137       0     254     228000        0
            DEVCTL   1024       0     220         153       0       0     225280        0
      malloc-65536  65536       1       2          47       0       1     196608        0
         UMA Zones    768     242       2         242       0      16     187392        0
         malloc-32     32    5326     344        6432       0     254     181440        0
        malloc-128    128    1212      59       26405       0     126     162688        0
            socket    944      50     118        6482       0     254     158592        0
       mbuf_packet    256      91     524       11884       0     254     157440        0
           VMSPACE   2544      48      12        3611       0       4     152640        0
       malloc-1024   1024     123      25        2150       0      16     151552        0
        128 Bucket   1024     113      30        2415       0      16     146432        0
       S VFS Cache    104    1068     336        3945       0     126     146016        0
       FFS2 dinode    256     529      26        3319       0      62     142080        0
         sctp_asoc   2288       7      53        1139       0     254     137280        0
      malloc-65536  65536       2       0           2       0       1     131072        0
      malloc-65536  65536       1       1           9       0       1     131072        0
            clpbuf   2624       0      48         633       0      16     125952        0
       malloc-2048   2048      12      46        3025       0       8     118784        0
          ksiginfo    112      72     972         285       0     126     116928        0
              PROC   1336      75      12        3636       0       8     116232        0
        malloc-256    256      23     427       11193       0      62     115200        0
        malloc-256    256     306     129        8329       0      62     111360        0
        malloc-128    128     832      36        2250       0     126     111104        0
           sctp_ep   1280       8      76        2830       0     254     107520        0
         filedesc0   1072      75      23        3650       0       8     105056        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
        malloc-384    384      45     185        3104       0      30      88320        0
        malloc-128    128     516      73        4278       0     126      75392        0
         64 Bucket    512      85      51        4722       0      30      69632        0
             g_bio    408       0     170       29590       0      30      69360        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-32768  32768       2       0           2       0       1      65536        0
       malloc-4096   4096      13       2          30       0       2      61440        0
       malloc-2048   2048      11      19        1045       0       8      61440        0
        sctp_raddr    736       6      71        1149       0     254      56672        0
         malloc-64     64     584     298        2437       0     254      56448        0
       malloc-1024   1024       7      45        1159       0      16      53248        0
             tcpcb   1080       9      40         919       0     254      52920        0
         32 Bucket    256      63     132        9361       0      62      49920        0
        malloc-256    256       2     178        5186       0      62      46080        0
         malloc-64     64     560     133        3607       0     254      44352        0
        malloc-384    384      17      93        4039       0      30      42240        0
       malloc-8192   8192       5       0           5       0       1      40960        0
       malloc-8192   8192       5       0           5       0       1      40960        0
            pcpu-8      8    4726     394        5214       0     254      40960        0
            da_ccb    544       0      70        8952       0      16      38080        0
           DIRHASH   1024      34       2          34       0      16      36864        0
             NAMEI   1024       0      36       27515       0      16      36864        0
             Files     80     257     193       17729       0     126      36000        0
     udplite_inpcb    496      14      58         936       0     254      35712        0
         tcp_inpcb    496      11      61         919       0     254      35712        0
        malloc-256    256      31     104        2888       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
       malloc-8192   8192       2       2           4       0       1      32768        0
           pcpu-64     64     487      25         487       0     254      32768        0
        malloc-128    128     157      91        2891       0     126      31744        0
      tcp_rack_pcb    832       5      31         295       0      16      29952        0
              pipe    744      34       6         575       0      16      29760        0
       malloc-4096   4096       7       0           7       0       2      28672        0
       malloc-2048   2048       7       7          39       0       8      28672        0
         TURNSTILE    136     188      22         188       0      62      28560        0
         16 Bucket    144      59     137         784       0      62      28224        0
             KNOTE    160      28     147       24877       0      62      28000        0
            ttyinq    160     135      40         300       0      62      28000        0
       malloc-8192   8192       3       0           3       0       1      24576        0
       malloc-1024   1024      18       6          68       0      16      24576        0
               PWD     32      28     728        2710       0     254      24192        0
           ttyoutq    256      72      18         160       0      62      23040        0
       tcp_bbr_pcb    832       0      27         353       0      16      22464        0
         malloc-64     64     156     159       48513       0     254      20160        0
         malloc-32     32     199     431        4145       0     254      20160        0
        malloc-128    128      65      90        5497       0     126      19840        0
        SLEEPQUEUE     88     188      36         188       0     126      19712        0
       Mountpoints   2752       2       5          10       0       4      19264        0
        malloc-384    384      34      16          34       0      30      19200        0
        malloc-256    256      42      33         519       0      62      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        2818       0       2      16384        0
       malloc-2048   2048       4       4         118       0       8      16384        0
       malloc-2048   2048       4       4          51       0       8      16384        0
       malloc-2048   2048       3       5         132       0       8      16384        0
       malloc-2048   2048       0       8          12       0       8      16384        0
       malloc-1024   1024      13       3          13       0      16      16384        0
         malloc-64     64      99     153       20451       0     254      16128        0
         malloc-64     64     204      48         248       0     254      16128        0
      vtnet_tx_hdr     24       0     668      336984       0     254      16032        0
         udp_inpcb    496       6      26         310       0     254      15872        0
        malloc-128    128      88      36         108       0     126      15872        0
        malloc-256    256      35      25          73       0      62      15360        0
       malloc-1024   1024       6       6           6       0      16      12288        0
       malloc-1024   1024       7       5          12       0      16      12288        0
        malloc-512    512       5      19         307       0      30      12288        0
        malloc-512    512       1      23         152       0      30      12288        0
      tcp_rack_map    112      15      93         702       0     126      12096        0
         malloc-32     32     250     128         338       0     254      12096        0
          2 Bucket     32      60     318         933       0     254      12096        0
         malloc-16     16     537     213        4318       0     254      12000        0
          8 Bucket     80      49     101        1350       0     126      12000        0
             ripcb    496       5      19          86       0     254      11904        0
        sctp_chunk    152       5      73         193       0     254      11856        0
              kenv    258      15      30        1042       0      30      11610        0
             unpcb    256      20      25        1352       0     254      11520        0
        malloc-384    384      23       7          30       0      30      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          10       0      16       8192        0
        malloc-512    512       8       8           9       0      30       8192        0
        malloc-512    512      10       6          14       0      30       8192        0
           rtentry    176      30      16          34       0      62       8096        0
             tcptw     88       2      90           8       0     254       8096        0
              PGRP     88      35      57          54       0     126       8096        0
          rl_entry     40      76     126          76       0     254       8080        0
sctp_stream_msg_out    112       0      72         134       0     254       8064        0
        sctp_laddr     48       0     168         781       0     254       8064        0
             udpcb     32       6     246        1246       0     254       8064        0
              ertt     72       9     103         919       0     126       8064        0
         malloc-64     64      57      69          97       0     254       8064        0
         malloc-64     64       8     118          12       0     254       8064        0
         malloc-32     32      31     221        2084       0     254       8064        0
         malloc-32     32     164      88         349       0     254       8064        0
         malloc-32     32      45     207        6889       0     254       8064        0
         malloc-32     32      72     180        2300       0     254       8064        0
         malloc-32     32       0     252          16       0     254       8064        0
          4 Bucket     48       6     162         102       0     254       8064        0
         malloc-16     16       1     499        4222       0     254       8000        0
         malloc-16     16       6     494           7       0     254       8000        0
         malloc-16     16      24     476         142       0     254       8000        0
         malloc-16     16      38     462       26289       0     254       8000        0
         malloc-16     16       7     493         121       0     254       8000        0
         malloc-16     16      20     480        4120       0     254       8000        0
        malloc-128    128      13      49          73       0     126       7936        0
        sctp_readq    152       0      52          70       0     254       7904        0
               AIO    208       0      38          23       0      62       7904        0
           cryptop    280       0      28          65       0      30       7840        0
     routing nhops    256      27       3          34       0      62       7680        0
        malloc-384    384       0      20          66       0      30       7680        0
        malloc-384    384       1      19           8       0      30       7680        0
        malloc-256    256      14      16         316       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
        malloc-512    512       4       4           5       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
   sctp_asconf_ack     48       1      83           1       0     254       4032        0
          tcpreass     48       0      84           1       0     254       4032        0
          sackhole     32       0     126           3       0     254       4032        0
         hostcache     64       1      62           1       0     254       4032        0
          syncache    168       0      24           4       0     254       4032        0
              AIOP     32       4     122           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
       sctp_asconf     40       0       0           0       0     254          0        0
   cdg_qdiffsample     16       0       0           0       0     254          0        0
   pf state scrubs     40       0       0           0       0     254          0        0
   pf frag entries     40       0       0           0       0     254          0        0
          pf frags    248       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0      62          0        0
pf table entry counters     64       0       0           0       0     254          0        0
   pf source nodes    136       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    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
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
             AIOCB    552       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
           NCLNODE    592       0       0           0       0      16          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
  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-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
        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 (112):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/12 11:01 freebsd-src c15384f89631 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/12 00:51 freebsd-src 95c51fafa40d 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/11 22:20 freebsd-src 95c51fafa40d 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/11 06:59 freebsd-src 67f508db84b8 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/10 08:57 freebsd-src 4a5a67fe679d 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/09 14:50 freebsd-src 6bddade6114a 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/09 03:26 freebsd-src e5018628e76a 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/08 15:27 freebsd-src 9748eb742791 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/08 02:37 freebsd-src 5668a155cbe6 6972b106 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/05 09:42 freebsd-src f3a3b0612169 7f7bb950 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/04 13:34 freebsd-src e94f1a0a37fd 6c236867 console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/07/10 16:17 freebsd-src 58080fbca09f 8f5a7b8c console log report ci-freebsd-main panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/13 05:08 freebsd-src c5bf58add0d5 3fd2ea69 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/12 22:45 freebsd-src c5bf58add0d5 3fd2ea69 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/10 19:12 freebsd-src 8f642f797a03 6972b106 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/10 10:37 freebsd-src 4a5a67fe679d 6972b106 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/09 17:59 freebsd-src 6bddade6114a 6972b106 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/09 05:55 freebsd-src e5018628e76a 6972b106 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/07 12:49 freebsd-src c18c74a87c15 6972b106 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/06 17:29 freebsd-src 362fef2f4a99 6972b106 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/06 10:19 freebsd-src b3e87f133454 2f537099 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/05 11:21 freebsd-src f3a3b0612169 7f7bb950 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/04 23:28 freebsd-src 21d854658801 b97d64c9 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/04 19:50 freebsd-src 21d854658801 b97d64c9 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/08/04 15:26 freebsd-src e94f1a0a37fd 6c236867 console log report ci-freebsd-i386 panic: ASan: Invalid access, 8-byte read in sctp_free_assoc
2021/09/01 08:06 freebsd-src 9e9ba9c73de9 7eb7e152 console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/28 00:01 freebsd-src b54eec836660 57b01c6e console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/22 07:37 freebsd-src efa485d5c390 b599f2fc console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/20 12:43 freebsd-src 464a166c27bb b599f2fc console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/20 04:04 freebsd-src a313b5240a47 b599f2fc console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/18 07:24 freebsd-src 045001075ed1 a2fe1cb5 console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/17 14:57 freebsd-src aa68b3bb2e11 a2fe1cb5 console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/16 11:48 freebsd-src cc1345056b11 6652437d console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/14 10:05 freebsd-src 288e553623d3 2489ab88 console log report ci-freebsd-main panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/31 20:25 freebsd-src 4a36122b1db1 7eb7e152 console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/31 15:54 freebsd-src 4a36122b1db1 7eb7e152 console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/31 02:10 freebsd-src d39e65b5bdc0 8f58a0ef console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/30 14:49 freebsd-src e76c0e4f4563 8f58a0ef console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/28 12:04 freebsd-src 08b9cc316a31 d5a29e53 console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/27 00:54 freebsd-src da3a09d8941d b318694d console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/25 09:06 freebsd-src e62175df4ec2 b599f2fc console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/21 15:02 freebsd-src c4622b01d2f1 b599f2fc console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/19 23:41 freebsd-src a313b5240a47 e2da378b console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/17 20:00 freebsd-src 5469a9953005 a2fe1cb5 console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/15 23:58 freebsd-src 4a77a9b64910 2489ab88 console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
2021/08/13 21:16 freebsd-src 57aaefdceccd 2489ab88 console log report ci-freebsd-i386 panic: ASan: Invalid access, NUM-byte read in sctp_free_assoc
* Struck through repros no longer work on HEAD.