syzbot


panic: Memory modified after free ADDR(736) val=ADDR @ ADDR

Status: closed as dup on 2021/09/08 20:34
Reported-by: syzbot+b4f083a4a3421bf6e8ee@syzkaller.appspotmail.com
First crash: 1295d, last: 1099d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
panic: mtx_lock() of spin mutex (null) @ /syzkaller/managers/main/kernel/sys/netinet/tcp_output.c:LINE syz 707 976d 1861d

Sample crash report:
panic: Memory modified after free 0xfffffe0094c6d9e0(736) val=deadc0e6 @ 0xfffffe0094c6db28

cpuid = 0
time = 1613601811
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0003778df0
vpanic() at vpanic+0x1c7/frame 0xfffffe0003778e50
panic() at panic+0x43/frame 0xfffffe0003778eb0
trash_ctor() at trash_ctor+0xa8/frame 0xfffffe0003778ef0
item_ctor() at item_ctor+0x1e2/frame 0xfffffe0003778f60
sctp_add_remote_addr() at sctp_add_remote_addr+0x570/frame 0xfffffe0003778fd0
sctp_handle_asconf() at sctp_handle_asconf+0x11d9/frame 0xfffffe00037792c0
sctp_process_control() at sctp_process_control+0x1666/frame 0xfffffe0003779750
sctp_common_input_processing() at sctp_common_input_processing+0x7db/frame 0xfffffe00037798e0
sctp_input_with_port() at sctp_input_with_port+0x306/frame 0xfffffe00037799d0
sctp_input() at sctp_input+0x1f/frame 0xfffffe00037799f0
ip_input() at ip_input+0x388/frame 0xfffffe0003779a90
swi_net() at swi_net+0x20d/frame 0xfffffe0003779b10
ithread_loop() at ithread_loop+0x33f/frame 0xfffffe0003779bb0
fork_exit() at fork_exit+0xb3/frame 0xfffffe0003779bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe0003779bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
KDB: enter: panic
[ thread pid 12 tid 100032 ]
Stopped at      kdb_enter+0x67: movq    $0,0x144397e(%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                       0x80
rdx         0xffffffff8199f9ac
rbx                          0
rsp         0xfffffe0003778dd0
rbp         0xfffffe0003778df0
rsi                        0x1
rdi                          0
r8                           0
r9                  0xffffffff
r10         0xaa0214ac08000500
r11                   0xf3c62f
r12         0xffffffff820678b0  ddb_dbbe
r13                          0
r14         0xffffffff81a4f0d5
r15         0xffffffff81a4f0d5
rip         0xffffffff81122e07  kdb_enter+0x67
rflags                    0x86
kdb_enter+0x67: movq    $0,0x144397e(%rip)
db> show proc
Process 12 (intr) at 0xfffff80004474a50:
 state: NORMAL
 uid: 0  gids: 0
 parent: pid 0 at 0xffffffff82519cf0
 ABI: null
 flag: 0x10000284  flag2: 0
 reaper: 0xffffffff82519cf0 reapsubtree: 12
 sigparent: 20
 vmspace: 0xffffffff8251a940
   (map 0xffffffff8251a940)
   (map.pmap 0xffffffff8251aa00)
   (pmap 0xffffffff8251aa60)
 threads: 23
100010                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100017                   I                                   [swi6: task queue]
100029                   I                                   [swi4: clock (0)]
100030                   I                                   [swi4: clock (1)]
100031                   I                                   [swi3: vm]
100032                   Run     CPU 0                       [swi1: netisr 0]
100044                   I                                   [irq24: virtio_pci0]
100045                   I                                   [irq25: virtio_pci0]
100046                   I                                   [irq26: virtio_pci0]
100047                   I                                   [irq27: virtio_pci0]
100048                   I                                   [irq28: virtio_pci1]
100049                   I                                   [irq29: virtio_pci1]
100050                   I                                   [irq30: virtio_pci1]
100051                   I                                   [irq31: virtio_pci1]
100052                   I                                   [irq32: virtio_pci1]
100057                   I                                   [irq10: virtio_pci2]
100059                   I                                   [irq1: atkbd0]
100060                   I                                   [irq12: psm0]
100061                   I                                   [swi0: uart uart++]
100069                   I                                   [swi1: pf send]
100082                   I                                   [swi1: hpts]
100083                   I                                   [swi1: hpts]
db> ps
  pid  ppid  pgrp   uid  state   wmesg   wchan               cmd
 2096  2090  2090     0  RV                                  syz-executor.1
 2090   785  2090     0  Ds      ppwait  0xfffff80019affa10  syz-executor.1
 2089   785  2089     0  Rs                                  syz-executor.3
 2088  2064  2064     0  R       (threaded)                  syz-executor.0
100118                   RunQ                                syz-executor.0
100280                   RunQ                                syz-executor.0
 2064   785  2064     0  Rs                                  syz-executor.0
 2057   785  2057     0  REs                                 syz-executor.2
 1839     1  1839     0  Ss      select  0xfffff80019d7f640  dhclient
 1830  1819   436     0  S       nanslp  0xffffffff82539f21  dhclient
 1819   436   436     0  S       wait    0xfffff80019a8f528  sh
  785   783   783     0  R       (threaded)                  syz-execprog
100113                   S       uwait   0xfffff8001930c900  syz-execprog
100114                   S       nanslp  0xffffffff82539f21  syz-execprog
100115                   S       uwait   0xfffff8001930cf00  syz-execprog
100116                   S       uwait   0xfffff80004ee6080  syz-execprog
100117                   S       uwait   0xfffff80004ee6180  syz-execprog
100119                   S       uwait   0xfffff80004debd80  syz-execprog
100120                   Run     CPU 1                       syz-execprog
100121                   RunQ                                syz-execprog
100122                   S       uwait   0xfffff8001930c780  syz-execprog
  783   781   783     0  Ss      pause   0xfffff80004e740b0  csh
  781   694   781     0  Ss      select  0xfffff8001930c640  sshd
  760     1   760     0  Ss+     ttyin   0xfffff8000486dcb0  getty
  759     1   759     0  Ss+     ttyin   0xfffff80004bb50b0  getty
  758     1   758     0  Ss+     ttyin   0xfffff80004bb54b0  getty
  757     1   757     0  Ss+     ttyin   0xfffff80004bb58b0  getty
  756     1   756     0  Ss+     ttyin   0xfffff80004bb5cb0  getty
  755     1   755     0  Ss+     ttyin   0xfffff80004bbf0b0  getty
  754     1   754     0  Ss+     ttyin   0xfffff80004bbf4b0  getty
  753     1   753     0  Ss+     ttyin   0xfffff80004bbf8b0  getty
  752     1   752     0  Ss+     ttyin   0xfffff80004bbfcb0  getty
  750     1    24     0  S+      piperd  0xfffff800192dc5d0  logger
  749   748    24     0  S+      nanslp  0xffffffff82539f20  sleep
  748     1    24     0  S+      wait    0xfffff80004ece528  sh
  698     1   698     0  Ss      nanslp  0xffffffff82539f21  cron
  694     1   694     0  Ss      select  0xfffff8001930c840  sshd
  507     1   507     0  Ss      select  0xfffff80004b9f3c0  syslogd
  436     1   436     0  Ss      wait    0xfffff80004ecea50  devd
  435     1   435    65  Rs                                  dhclient
  350     1   350     0  Ss      select  0xfffff80004ee67c0  dhclient
  347     1   347     0  Ss      select  0xfffff80004dc93c0  dhclient
   23     0     0     0  DL      vlruwt  0xfffff80004d56528  [vnlru]
   22     0     0     0  DL      syncer  0xffffffff82629338  [syncer]
   21     0     0     0  DL      (threaded)                  [bufdaemon]
100079                   D       qsleep  0xffffffff82628400  [bufdaemon]
100084                   D       -       0xffffffff8200ad00  [bufspacedaemon-0]
100097                   D       sdflush 0xfffff80004e330e8  [/ worker]
   20     0     0     0  DL      psleep  0xffffffff82650248  [vmdaemon]
   19     0     0     0  DL      (threaded)                  [pagedaemon]
100077                   D       psleep  0xffffffff826446b8  [dom0]
100085                   D       launds  0xffffffff826446c4  [laundry: dom0]
100086                   D       umarcl  0xffffffff815ad650  [uma]
   18     0     0     0  DL      -       0xffffffff8236e2a8  [rand_harvestq]
   17     0     0     0  RL                                  [sctp_iterator]
   16     0     0     0  DL      pftm    0xffffffff82bce430  [pf purge]
   15     0     0     0  DL      -       0xffffffff82625a5c  [soaiod4]
    9     0     0     0  DL      -       0xffffffff82625a5c  [soaiod3]
    8     0     0     0  DL      -       0xffffffff82625a5c  [soaiod2]
    7     0     0     0  DL      -       0xffffffff82625a5c  [soaiod1]
    6     0     0     0  DL      (threaded)                  [cam]
100043                   D       -       0xffffffff82245bc0  [doneq0]
100076                   D       -       0xffffffff82245a90  [scanner]
   14     0     0     0  DL      seqstat 0xfffff80004663c88  [sequencer 00]
    5     0     0     0  DL      crypto_ 0xfffff80004346b90  [crypto returns 1]
    4     0     0     0  DL      crypto_ 0xfffff80004346b30  [crypto returns 0]
    3     0     0     0  DL      crypto_ 0xffffffff82641ba0  [crypto]
   13     0     0     0  DL      (threaded)                  [geom]
100034                   D       -       0xffffffff82519760  [g_event]
100035                   D       -       0xffffffff82519768  [g_up]
100036                   D       -       0xffffffff82519770  [g_down]
    2     0     0     0  DL      (threaded)                  [KTLS]
100027                   D       -       0xfffff8000434bd00  [thr_0]
100028                   D       -       0xfffff8000434bd80  [thr_1]
   12     0     0     0  RL      (threaded)                  [intr]
100010                   I                                   [swi6: Giant taskq]
100015                   I                                   [swi5: fast taskq]
100017                   I                                   [swi6: task queue]
100029                   I                                   [swi4: clock (0)]
100030                   I                                   [swi4: clock (1)]
100031                   I                                   [swi3: vm]
100032                   Run     CPU 0                       [swi1: netisr 0]
100044                   I                                   [irq24: virtio_pci0]
100045                   I                                   [irq25: virtio_pci0]
100046                   I                                   [irq26: virtio_pci0]
100047                   I                                   [irq27: virtio_pci0]
100048                   I                                   [irq28: virtio_pci1]
100049                   I                                   [irq29: virtio_pci1]
100050                   I                                   [irq30: virtio_pci1]
100051                   I                                   [irq31: virtio_pci1]
100052                   I                                   [irq32: virtio_pci1]
100057                   I                                   [irq10: virtio_pci2]
100059                   I                                   [irq1: atkbd0]
100060                   I                                   [irq12: psm0]
100061                   I                                   [swi0: uart uart++]
100069                   I                                   [swi1: pf send]
100082                   I                                   [swi1: hpts]
100083                   I                                   [swi1: hpts]
   11     0     0     0  RL      (threaded)                  [idle]
100003                   CanRun                              [idle: cpu0]
100004                   CanRun                              [idle: cpu1]
    1     0     1     0  SLs     wait    0xfffff80004457528  [init]
   10     0     0     0  DL      audit_w 0xffffffff826420c0  [audit]
    0     0     0     0  RLs     (threaded)                  [kernel]
100000                   D       swapin  0xffffffff82519cf0  [swapper]
100005                   D       -       0xfffff80004472100  [if_io_tqg_0]
100006                   D       -       0xfffff80004472000  [if_io_tqg_1]
100007                   D       -       0xfffff80004473e00  [if_config_tqg_0]
100008                   D       -       0xfffff80004473d00  [softirq_0]
100009                   D       -       0xfffff80004473c00  [softirq_1]
100011                   D       -       0xfffff80004473900  [inm_free taskq]
100012                   D       -       0xfffff80004473800  [linuxkpi_irq_wq]
100013                   D       -       0xfffff80004473700  [thread taskq]
100014                   D       -       0xfffff80004473600  [aiod_kick taskq]
100016                   D       -       0xfffff80004473300  [kqueue_ctx taskq]
100018                   RunQ                                [in6m_free taskq]
100019                   D       -       0xfffff80004478e00  [linuxkpi_short_wq_0]
100020                   D       -       0xfffff80004478e00  [linuxkpi_short_wq_1]
100021                   D       -       0xfffff80004478e00  [linuxkpi_short_wq_2]
100022                   D       -       0xfffff80004478e00  [linuxkpi_short_wq_3]
100023                   D       -       0xfffff80004478d00  [linuxkpi_long_wq_0]
100024                   D       -       0xfffff80004478d00  [linuxkpi_long_wq_1]
100025                   D       -       0xfffff80004478d00  [linuxkpi_long_wq_2]
100026                   D       -       0xfffff80004478d00  [linuxkpi_long_wq_3]
100033                   D       -       0xfffff80004478700  [firmware taskq]
100037                   D       -       0xfffff80004478600  [crypto_0]
100038                   D       -       0xfffff80004478600  [crypto_1]
100053                   D       -       0xfffff80004892d00  [vtnet0 rxq 0]
100054                   D       -       0xfffff80004892c00  [vtnet0 txq 0]
100055                   D       -       0xfffff80004892b00  [vtnet0 rxq 1]
100056                   D       -       0xfffff80004892a00  [vtnet0 txq 1]
100058                   D       vtbslp  0xfffff80004880d00  [virtio_balloon]
100062                   D       -       0xfffff80004892300  [mca taskq]
100066                   D       -       0xffffffff81dfa3d0  [deadlkres]
100071                   D       -       0xfffff80004b48c00  [acpi_task_0]
100072                   D       -       0xfffff80004b48c00  [acpi_task_1]
100073                   D       -       0xfffff80004b48c00  [acpi_task_2]
100075                   D       -       0xfffff80004478500  [CAM taskq]
 2094  2089  2089     0  Z                                   ifconfig
db> show all locks
Process 2088 (syz-executor.0) thread 0xfffffe0094cca000 (100280)
exclusive lockmgr ufs (ufs) r = 0 (0xfffff80019b8a250) locked @ /syzkaller/managers/main/kernel/sys/ufs/ffs/ffs_vfsops.c:2003
exclusive lockmgr ufs (ufs) r = 0 (0xfffff80019c357f0) locked @ /syzkaller/managers/main/kernel/sys/kern/vfs_cache.c:4263
Process 17 (sctp_iterator) thread 0xfffffe0051b69e00 (100070)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe0094c6a1a0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctputil.c:1515
exclusive sleep mutex sctp-inp (inp) r = 0 (0xfffff80019b48e68) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctputil.c:1475
exclusive sleep mutex sctp-it (iterator) r = 0 (0xffffffff82d567d8) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctputil.c:1452
shared rw sctp-info (sctp-info) r = 0 (0xfffffe000419d1f0) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctputil.c:1451
Process 12 (intr) thread 0xfffffe000410c500 (100032)
exclusive sleep mutex sctp-tcb (tcb) r = 0 (0xfffffe0094c88380) locked @ /syzkaller/managers/main/kernel/sys/netinet/sctp_pcb.c:1161
Process 0 (kernel) thread 0xfffffe0004281800 (100018)
exclusive sleep mutex if_addr_lock (if_addr_lock) r = 0 (0xfffff80019a58198) locked @ /syzkaller/managers/main/kernel/sys/net/if.c:3683
exclusive sx in6_multi_sx (in6_multi_sx) r = 0 (0xffffffff8263f7b8) locked @ /syzkaller/managers/main/kernel/sys/netinet6/in6_mcast.c:615
db> show malloc
              Type        InUse        MemUse     Requests
           pf_hash            5        11524K            5
            devbuf         4216         4340K         4241
          tcp_hpts            5         3201K            5
             vtbuf           24         1968K           46
         sysctloid        30827         1808K        30893
              kobj          331         1324K          491
            newblk          871         1242K          942
          vfscache            3         1025K            3
          inodedep          622          745K          943
               pcb           28          544K         1194
         ufs_quota            1          512K            1
          vfs_hash            1          512K            1
           callout            2          512K            2
              intr            4          472K            4
           subproc          126          251K         2167
           pagedep          432          236K          440
            acpica         1674          184K        55181
         vnet_data            1          168K            1
           tidhash            3          141K            3
        tfo_ccache            1          128K            1
            DEVFS1          106          106K          123
               sem            4          106K            4
          filedesc           14          105K         2365
            linker          286          101K          729
               bus          989           81K         3493
            diradd          593           75K          749
          mtx_pool            2           72K            2
             mkdir          567           71K          852
          syncache            1           68K            1
          acpitask            1           64K            1
       ddb_capture            1           64K            1
            module          506           64K          506
         newdirblk          423           53K          427
              umtx          324           41K          324
           kdtrace          198           39K         2378
            ip6ndp          146           36K          417
              temp           35           33K         8543
         hostcache            1           32K            1
               shm            1           32K            1
            DEVFS3          125           32K          135
               msg            4           30K            4
              vmem            3           28K            6
        gtaskqueue           18           26K           18
            kbdmux            6           22K            6
        DEVFS_RULE           56           20K           56
            ifaddr           66           19K          476
               BPF           14           19K           46
         ufs_mount            5           17K            6
              proc            3           17K            3
               tty           16           16K           16
           ithread           99           16K           99
            bus-sc           32           14K         1718
            KTRACE          100           13K          100
             ifnet            7           13K            7
           lltable           40           12K          715
              kenv           93           12K           93
       ether_multi          142           12K         3017
      eventhandler          133           12K          133
              GEOM           60           10K          489
              rman           82           10K          423
         bmsafemap            3            9K          775
              UART           12            9K           12
           devstat            4            9K            4
              ksem            1            8K            1
         sctp_timw           32            8K           32
               rpc            2            8K            2
             shmfd            1            8K            1
       pfs_vncache            1            8K            1
         in6_multi           58            8K         1900
         pfs_nodes           20            8K           20
     audit_evclass          236            8K          294
            sglist            5            7K            5
           CAM DEV            3            6K          510
         taskqueue           57            6K           57
            kqueue           58            6K         2103
            plimit           22            6K         1377
              cred           21            6K          261
       ufs_dirhash           27            6K           30
         CAM queue            5            6K         1528
          sctp_ifa           36            5K          418
          pf_ifnet           10            5K           19
               UMA          262            5K          262
            dirrem           17            5K          169
                vt           11            5K           11
           memdesc            1            4K            1
               MCA           32            4K           32
             evdev            4            4K            4
         sctp_atcl           10            4K         1104
          routetbl           19            4K          293
           pwddesc           54            4K         2097
             hhook           13            4K           13
           session           25            4K          183
         sctp_stro            3            3K          276
       fpukern_ctx            3            3K            3
           acpisem           22            3K           22
          terminal           11            3K           11
         proc-args           47            3K         2444
          indirdep           10            3K           10
             lockf           22            3K           57
           uidinfo            3            3K            8
        local_apic            1            2K            1
           io_apic            1            2K            1
         ipsec-saq            2            2K            2
             selfd           28            2K        18598
            Unitno           30            2K           47
           CAM XPT           22            2K          543
         sctp_stri            3            2K          276
          freefile           11            2K          150
         sctp_atky           19            2K         1371
       ipsecpolicy            2            2K            2
           acpidev           20            2K           20
               msi            9            2K            9
             clone            9            2K            9
            select            9            2K           59
               tun            7            2K            7
           softdep            1            1K            1
            sahead            1            1K            1
          secasvar            1            1K            1
          in_multi            4            1K          143
             nhops            6            1K           76
       vnodemarker            2            1K           10
      NFSD session            1            1K            1
        CAM periph            4            1K          271
             ipsec            3            1K            3
               mld            6            1K            6
              igmp            6            1K            6
         toponodes            6            1K            6
            isadev            6            1K            6
             mount           16            1K           89
          pci_link           10            1K           10
          sctp_ifn            5            1K          418
            crypto            4            1K            4
 encap_export_host           12            1K           12
      linuxcurrent            3            1K            4
              pfil            4            1K            4
           CAM SIM            2            1K            2
              cdev            2            1K            2
          freework            2            1K           30
    chacha20random            1            1K            1
            DEVFSP            6            1K          150
               osd            3            1K           10
         sctp_iter            1            1K          319
         sctp_aadr            4            1K          107
          freeblks            1            1K           29
            vnodes            1            1K            1
              ktls            1            1K            1
          procdesc            2            1K           20
      NFSD lckfile            1            1K            1
     NFSD V4client            1            1K            1
             DEVFS            9            1K           10
            feeder            7            1K            7
       inpcbpolicy            6            1K         1169
           tcpfunc            3            1K            3
        loginclass            3            1K            7
            prison            6            1K            6
             linux            5            1K            6
         sctp_athm           10            1K         1104
        aesni_data            2            1K            2
            apmdev            1            1K            1
     CAM dev queue            2            1K            2
          atkbddev            2            1K            2
 CAM I/O Scheduler            1            1K            1
          freefrag            1            1K           12
          CAM path            4            1K         1034
          pmchooks            1            1K            1
            soname            4            1K         3584
          filecaps            4            1K          112
          sctp_map            6            1K          552
          nexusdev            6            1K            6
          sctp_vrf            1            1K            1
              vnet            1            1K            1
           entropy            2            1K          181
          acpiintr            1            1K            1
               pmc            1            1K            1
              cpus            2            1K            2
    vnet_data_free            1            1K            1
           Per-cpu            1            1K            1
         sctp_a_it            1            1K          319
          p1003.1b            1            1K            1
        sctp_mcore            0            0K            0
        sctp_socko            0            0K            0
         sctp_mvrf            0            0K            0
         sctp_cpal            0            0K            0
         sctp_cmsg            0            0K            0
         sctp_stre            0            0K            0
         sctp_athi            0            0K            0
          pf_table            0            0K            0
           pf_rule            0            0K            0
           pf_altq            0            0K            0
           pf_osfp            0            0K            0
           pf_temp            0            0K            0
            mqdata            0            0K            0
            DEVFS4            0            0K            0
        madt_table            0            0K            2
          smartpqi            0            0K            0
            DEVFS2            0            0K            0
            gntdev            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     943       12335       0     254   37941248        0
              pbuf   2624       0     973           0       0       2    2553152        0
              mbuf    256    8601     834       41148       0     254    2415360        0
          BUF TRIE    144     178   13290         817       0      62    1939392        0
       malloc-4096   4096     387       6        2588       0       2    1609728        0
        malloc-384    384    4116       4        4463       0      30    1582080        0
        malloc-128    128   10765      23       11873       0     126    1380864        0
         FFS inode   1128    1069      16        1220       0       8    1223880        0
       UMA Slabs 0    112   10167      18       10167       0     126    1140720        0
             VNODE    480    1104      40        1257       0      30     549120        0
         VM OBJECT    264    1571      64       40487       0      30     431640        0
      malloc-65536  65536       4       2         586       0       1     393216        0
        malloc-256    256    1516      14        3060       0      62     391680        0
        RADIX NODE    144    2392     265       80866       0      62     382608        0
            DEVCTL   1024     270     102         402       0       0     380928        0
            THREAD   1792     141      21         280       0       8     290304        0
      malloc-16384  16384      11       6        1293       0       1     278528        0
       FFS2 dinode    256    1068      12        1218       0      62     276480        0
        malloc-384    384     649      21        1645       0      30     257280        0
        256 Bucket   2048     114       6       10381       0       8     245760        0
        malloc-128    128    1736      31        4997       0     126     226176        0
         malloc-64     64    3426      39        5528       0     254     221760        0
         malloc-16     16   12802     198       13553       0     254     208000        0
      mbuf_cluster   2048      90       2          90       0     254     188416        0
         UMA Zones    768     234       0         234       0      16     179712        0
         malloc-32     32    4907     133        6776       0     254     161280        0
        malloc-128    128    1189      51       25972       0     126     158720        0
       S VFS Cache    104    1279     242        2417       0     126     158184        0
         vmem btag     56    2492      88        2492       0     254     144480        0
       malloc-1024   1024     126      10        5664       0      16     139264        0
         MAP ENTRY     96    1044     384      141668       0     126     137088        0
      malloc-65536  65536       2       0           2       0       1     131072        0
          ksiginfo    112      54     990         340       0     126     116928        0
           VMSPACE   2544      31      14        2074       0       4     114480        0
       malloc-2048   2048       8      42        2871       0       8     102400        0
              PROC   1320      55      14        2096       0       8      91080        0
        sctp_raddr    736      13     108        1337       0     254      89056        0
          UMA Kegs    384     220       3         220       0      30      85632        0
            clpbuf   2624       0      32          15       0      16      83968        0
         filedesc0   1072      55      22        2097       0       8      82544        0
        malloc-128    128     546      43        3741       0     126      75392        0
       malloc-8192   8192       6       3         135       0       1      73728        0
             g_bio    408       0     170        6557       0      30      69360        0
        128 Bucket   1024      38      29         673       0      16      68608        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       1       0           1       0       1      65536        0
      malloc-65536  65536       0       1           8       0       1      65536        0
       malloc-4096   4096      13       2          25       0       2      61440        0
        malloc-256    256     183      57        1052       0      62      61440        0
         malloc-64     64     667     278       25074       0     254      60480        0
       malloc-8192   8192       7       0           7       0       1      57344        0
       malloc-4096   4096       6       8          25       0       2      57344        0
         sctp_asoc   2288       3      22         276       0     254      57200        0
        malloc-384    384     122       8         302       0      30      49920        0
       malloc-2048   2048       6      18         567       0       8      49152        0
        malloc-256    256     158      22         434       0      62      46080        0
         32 Bucket    256      47     133        5074       0      62      46080        0
            socket    944      21      27        3599       0     254      45312        0
       malloc-4096   4096       6       5         749       0       2      45056        0
           DIRHASH   1024      37       3          39       0      16      40960        0
            pcpu-8      8    4535     585        6927       0     254      40960        0
         64 Bucket    512      63      17        3250       0      30      40960        0
              pipe    744      20      35         936       0      16      40920        0
         malloc-64     64     536      94         934       0     254      40320        0
           sctp_ep   1280       4      26         414       0     254      38400        0
        malloc-256    256     108      42        1082       0      62      38400        0
             NAMEI   1024       2      34       43187       0      16      36864        0
       malloc-4096   4096       9       0           9       0       2      36864        0
        malloc-384    384      39      51         449       0      30      34560        0
        malloc-256    256      64      71         601       0      62      34560        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       0       1         130       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-32768  32768       1       0           1       0       1      32768        0
      malloc-16384  16384       2       0           2       0       1      32768        0
       malloc-8192   8192       4       0           4       0       1      32768        0
       malloc-1024   1024      11      21         284       0      16      32768        0
           pcpu-64     64     479      33         479       0     254      32768        0
       malloc-2048   2048      12       2          14       0       8      28672        0
             KNOTE    160      28     147       10335       0      62      28000        0
        malloc-128    128      70     147        1452       0     126      27776        0
     routing nhops    256      22      83         711       0      62      26880        0
        malloc-384    384      11      59        1105       0      30      26880        0
        malloc-256    256      64      41        1619       0      62      26880        0
         TURNSTILE    136     163      26         163       0      62      25704        0
       malloc-8192   8192       2       1           4       0       1      24576        0
            ttyinq    160     135      15         300       0      62      24000        0
             tcpcb   1048       3      19           7       0     254      23056        0
           ttyoutq    256      72      18         160       0      62      23040        0
       mbuf_packet    256       1      89        1286       0     254      23040        0
       malloc-1024   1024      18       2          18       0      16      20480        0
       malloc-1024   1024      14       6          31       0      16      20480        0
        malloc-512    512      13      27         287       0      30      20480        0
           rtentry    176      24      91         711       0      62      20240        0
               PWD     32      15     615         523       0     254      20160        0
             Files     80     118     132       24201       0     126      20000        0
        malloc-128    128     129      26         154       0     126      19840        0
        sctp_chunk    152      13     117        1288       0     254      19760        0
       Mountpoints   2752       2       5           2       0       4      19264        0
        SLEEPQUEUE     88     163      29         163       0     126      16896        0
      malloc-16384  16384       1       0           1       0       1      16384        0
       malloc-8192   8192       2       0           2       0       1      16384        0
         malloc-64     64      65     187        1350       0     254      16128        0
         malloc-32     32     246     258        4963       0     254      16128        0
          8 Bucket     80      40     160         615       0     126      16000        0
        malloc-256    256      25      35         419       0      62      15360        0
        malloc-512    512       3      21         180       0      30      12288        0
         malloc-64     64     132      57         135       0     254      12096        0
         malloc-32     32      43     335        1410       0     254      12096        0
         malloc-32     32     151     227        2065       0     254      12096        0
         malloc-16     16     510     240        2432       0     254      12000        0
        malloc-128    128      64      29         105       0     126      11904        0
        malloc-128    128       1      92        1062       0     126      11904        0
         udp_inpcb    488       2      22        1152       0     254      11712        0
              kenv    258      15      30        1067       0      30      11610        0
       malloc-8192   8192       1       0           1       0       1       8192        0
       malloc-4096   4096       0       2         339       0       2       8192        0
       malloc-4096   4096       2       0           2       0       2       8192        0
       malloc-2048   2048       4       0           4       0       8       8192        0
       malloc-2048   2048       3       1           3       0       8       8192        0
       malloc-2048   2048       0       4         256       0       8       8192        0
       malloc-1024   1024       0       8           9       0      16       8192        0
       malloc-1024   1024       2       6           2       0      16       8192        0
        malloc-512    512       2      14          10       0      30       8192        0
        malloc-512    512       3      13         511       0      30       8192        0
        malloc-512    512       2      14          11       0      30       8192        0
              PGRP     88      25      67         183       0     126       8096        0
          rl_entry     40      50     152          50       0     254       8080        0
   sctp_asconf_ack     48       2     166          65       0     254       8064        0
        sctp_laddr     48       6     162         863       0     254       8064        0
             udpcb     32       2     250        1152       0     254       8064        0
         malloc-64     64       4     122       21354       0     254       8064        0
         malloc-64     64      11     115          23       0     254       8064        0
         malloc-64     64      22     104        1191       0     254       8064        0
         malloc-32     32       5     247          13       0     254       8064        0
         malloc-32     32      37     215        3675       0     254       8064        0
         malloc-32     32      31     221         222       0     254       8064        0
         malloc-32     32      56     196        1726       0     254       8064        0
         16 Bucket    144      39      17         245       0      62       8064        0
          4 Bucket     48       7     161          69       0     254       8064        0
          2 Bucket     32      52     200         676       0     254       8064        0
      vtnet_tx_hdr     24       0     334        1333       0     254       8016        0
         malloc-16     16       2     498         626       0     254       8000        0
         malloc-16     16       6     494           6       0     254       8000        0
         malloc-16     16      17     483          21       0     254       8000        0
         malloc-16     16      36     464       26405       0     254       8000        0
         malloc-16     16       1     499         118       0     254       8000        0
         malloc-16     16       9     491         148       0     254       8000        0
             ripcb    488       1      15          10       0     254       7808        0
         tcp_inpcb    488       3      13           7       0     254       7808        0
             unpcb    256      11      19        1710       0     254       7680        0
        malloc-384    384      15       5          15       0      30       7680        0
        malloc-256    256       1      29        2691       0      62       7680        0
     FPU_save_area    832       1       8           1       0      16       7488        0
            cpuset    104       7      55           7       0     126       6448        0
 epoch_record pcpu    256       4      12           4       0      62       4096        0
       malloc-4096   4096       0       1           2       0       2       4096        0
       malloc-2048   2048       2       0           2       0       8       4096        0
       malloc-1024   1024       1       3           1       0      16       4096        0
       malloc-1024   1024       2       2           2       0      16       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
        malloc-512    512       1       7           1       0      30       4096        0
           pcpu-16     16       7     249           7       0     254       4096        0
         hostcache     96       1      41           1       0     254       4032        0
          syncache    168       0      24           5       0     254       4032        0
       UMA Slabs 1    176       9      13           9       0      62       3872        0
        malloc-384    384       1       9           1       0      30       3840        0
            mqnode    416       3       6           3       0      30       3744        0
        KMAP ENTRY     96      12      27          12       0       0       3744        0
              vmem   1856       1       1           1       0       8       3712        0
           SMR CPU     32       2      29           2       0     254        992        0
        SMR SHARED     24       2      29           2       0     254        744        0
       FFS1 dinode    128       0       0           0       0     126          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
sctp_stream_msg_out    112       0       0           0       0     254          0        0
        sctp_readq    152       0       0           0       0     254          0        0
   pf state scrubs     40       0       0           0       0     254          0        0
   pf frag entries     40       0       0           0       0     254          0        0
          pf frags    248       0       0           0       0      62          0        0
  pf table entries    160       0       0           0       0      62          0        0
pf table entry counters     64       0       0           0       0     254          0        0
   pf source nodes    136       0       0           0       0     254          0        0
     pf state keys     88       0       0           0       0     126          0        0
         pf states    296       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_bbr_pcb    832       0       0           0       0      16          0        0
       tcp_bbr_map    128       0       0           0       0     126          0        0
      tcp_rack_pcb    704       0       0           0       0      16          0        0
      tcp_rack_map    120       0       0           0       0     126          0        0
    IPsec SA lft_c     16       0       0           0       0     254          0        0
     udplite_inpcb    488       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
           tcp_log    416       0       0           0       0     254          0        0
          tcpreass     48       0       0           0       0     254          0        0
tfo_ccache_entries     80       0       0           0       0     126          0        0
               tfo      4       0       0           0       0     254          0        0
          sackhole     32       0       0           0       0     254          0        0
             tcptw     88       0       0           0       0     254          0        0
               ipq     56       0       0           0       0     254          0        0
            itimer    352       0       0           0       0      30          0        0
            AIOLIO    272       0       0           0       0      30          0        0
             AIOCB    552       0       0           0       0      16          0        0
              AIOP     32       0       0           0       0     254          0        0
               AIO    208       0       0           0       0      62          0        0
           NCLNODE    584       0       0           0       0      16          0        0
        mqnotifier    216       0       0           0       0      62          0        0
            mvdata     64       0       0           0       0     254          0        0
            mqueue    248       0       0           0       0      62          0        0
        TMPFS node    224       0       0           0       0      62          0        0
     LTS VFS Cache    360       0       0           0       0      30          0        0
       L VFS Cache    320       0       0           0       0      30          0        0
     STS VFS Cache    144       0       0           0       0      62          0        0
           cryptop    280       0       0           0       0      30          0        0
  linux_dma_object     24       0       0           0       0     254          0        0
  linux_dma_pctrie    144       0       0           0       0      62          0        0
   IOMMU_MAP_ENTRY    120       0       0           0       0     126          0        0
      ktls_session    192       0       0           0       0      62          0        0
    mbuf_jumbo_16k  16384       0       0           0       0     254          0        0
     mbuf_jumbo_9k   9216       0       0           0       0     254          0        0
      audit_record   1280       0       0           0       0       8          0        0
         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-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-16384  16384       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
       malloc-8192   8192       0       0           0       0       1          0        0
       malloc-2048   2048       0       0           0       0       8          0        0
        malloc-512    512       0       0           0       0      30          0        0
        malloc-384    384       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
db> 

Crashes (95):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/02/17 22:47 freebsd-src ab4fad4be144 14052202 console log report syz ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2021/02/08 00:19 freebsd-src 6117aa58fa4f 2ce644fc console log report syz ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2021/02/06 08:11 freebsd-src 344f1083e128 42b90a7c console log report syz ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2021/01/28 21:06 freebsd-src b8051298b0a3 7df34f59 console log report syz ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2021/01/28 20:05 freebsd-src b8051298b0a3 7df34f59 console log report syz ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2021/01/26 09:18 freebsd-src 25cdacf79b06 52e37319 console log report syz ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2020/12/06 21:18 freebsd b531e6856765 c521566d console log report syz ci-freebsd-main
2020/12/06 14:29 freebsd b531e6856765 c521566d console log report syz ci-freebsd-main
2020/11/26 22:46 freebsd 6db1a3e80986 2f1cec62 console log report syz ci-freebsd-main
2020/11/26 13:05 freebsd 6db1a3e80986 2f1cec62 console log report syz ci-freebsd-main
2020/11/25 21:57 freebsd 8848cda937bc 2f1cec62 console log report syz ci-freebsd-main
2020/11/24 12:30 freebsd 03250e131186 bed14cd9 console log report syz ci-freebsd-main
2020/11/24 11:52 freebsd 03250e131186 bed14cd9 console log report syz ci-freebsd-main
2020/11/24 10:12 freebsd 03250e131186 bed14cd9 console log report syz ci-freebsd-main
2020/11/23 17:59 freebsd 14b48c5d2a17 878fb17a console log report syz ci-freebsd-main
2020/11/23 17:20 freebsd 14b48c5d2a17 878fb17a console log report syz ci-freebsd-main
2020/11/23 10:26 freebsd 327654569258 0d27f508 console log report syz ci-freebsd-main
2020/11/21 17:46 freebsd 89258e06fde6 2f4d85f4 console log report syz ci-freebsd-main
2020/11/21 07:04 freebsd dd05efc4c17b 68068804 console log report syz ci-freebsd-main
2020/11/20 21:42 freebsd 5dc4ad3d38ab 740ff461 console log report syz ci-freebsd-main
2020/11/20 18:47 freebsd 5dc4ad3d38ab 740ff461 console log report syz ci-freebsd-main
2020/11/20 17:24 freebsd 5dc4ad3d38ab 740ff461 console log report syz ci-freebsd-main
2020/11/19 10:25 freebsd 9c3205def665 0767f13f console log report syz ci-freebsd-main
2020/11/18 01:42 freebsd e907c380568e 09323409 console log report syz ci-freebsd-main
2020/11/17 14:21 freebsd ea386c4be4a9 bd2a760b console log report syz ci-freebsd-main
2020/11/15 20:50 freebsd 7d967e2081cc 1bf9a662 console log report syz ci-freebsd-main
2020/11/15 07:29 freebsd e567d6b95b7b 1bf9a662 console log report syz ci-freebsd-main
2020/11/14 15:44 freebsd 5374f9a26da6 1bf9a662 console log report syz ci-freebsd-main
2020/11/26 15:10 freebsd 6db1a3e80986 2f1cec62 console log report syz ci-freebsd-i386
2020/11/26 00:23 freebsd 8848cda937bc 2f1cec62 console log report syz ci-freebsd-i386
2020/11/24 12:45 freebsd ec9da780f1f2 bed14cd9 console log report syz ci-freebsd-i386
2020/11/24 12:18 freebsd ec9da780f1f2 bed14cd9 console log report syz ci-freebsd-i386
2020/11/24 11:28 freebsd ec9da780f1f2 bed14cd9 console log report syz ci-freebsd-i386
2020/11/23 19:45 freebsd 14b48c5d2a17 878fb17a console log report syz ci-freebsd-i386
2020/11/23 19:14 freebsd 14b48c5d2a17 878fb17a console log report syz ci-freebsd-i386
2020/11/21 18:41 freebsd 89258e06fde6 2f4d85f4 console log report syz ci-freebsd-i386
2020/11/21 06:48 freebsd dd05efc4c17b 68068804 console log report syz ci-freebsd-i386
2020/11/20 22:02 freebsd fa6ca2c0923f 740ff461 console log report syz ci-freebsd-i386
2020/11/20 19:36 freebsd fa6ca2c0923f 740ff461 console log report syz ci-freebsd-i386
2020/11/20 17:45 freebsd fa6ca2c0923f 740ff461 console log report syz ci-freebsd-i386
2020/11/18 02:53 freebsd e907c380568e 09323409 console log report syz ci-freebsd-i386
2020/11/17 14:43 freebsd ea386c4be4a9 bd2a760b console log report syz ci-freebsd-i386
2020/11/15 21:28 freebsd 7d967e2081cc 1bf9a662 console log report syz ci-freebsd-i386
2020/11/15 07:47 freebsd fb5fb2a8e57c 1bf9a662 console log report syz ci-freebsd-i386
2020/11/14 20:33 freebsd 5374f9a26da6 1bf9a662 console log report syz ci-freebsd-i386
2020/11/14 19:59 freebsd 5374f9a26da6 1bf9a662 console log report syz ci-freebsd-i386
2020/10/01 07:10 freebsd 646e74f7f594 a9767fb2 console log report syz ci-freebsd-i386
2021/04/15 10:17 freebsd-src 8e84712d01eb fcdb12ba console log report ci-freebsd-main panic: Memory modified after free ADDR(736) val=ADDR @ ADDR
2020/12/11 06:33 freebsd 2368600a0630 2a55c22b console log report ci-freebsd-main
2020/12/04 04:28 freebsd 7bb279d52a02 9e0b299f console log report ci-freebsd-main
2020/12/02 11:58 freebsd 60a2cf64ac04 eff43e99 console log report ci-freebsd-main
2020/11/19 08:19 freebsd 9c3205def665 0767f13f console log report ci-freebsd-main
2020/11/19 07:19 freebsd 9c3205def665 0767f13f console log report ci-freebsd-main
2020/11/10 09:19 freebsd abab05d9ec40 cca87986 console log report ci-freebsd-main
2020/11/07 06:12 freebsd c4f7f2c1ece8 64069d48 console log report ci-freebsd-main
2020/11/01 23:41 freebsd 7aa7d228a6f6 8bc4594f console log report ci-freebsd-main
2020/11/01 09:14 freebsd 8faaaf33250c 8bc4594f console log report ci-freebsd-main
2020/10/21 23:38 freebsd 048377c24aeb be6b1582 console log report ci-freebsd-main
2020/10/21 02:42 freebsd b2a91221764d ff4a3345 console log report ci-freebsd-main
2020/10/21 01:38 freebsd b2a91221764d ff4a3345 console log report ci-freebsd-main
2020/10/19 22:20 freebsd fecd1f222fc6 ff4a3345 console log report ci-freebsd-main
2020/10/19 05:29 freebsd f103c610ffe8 fea47c01 console log report ci-freebsd-main
2020/10/13 21:00 freebsd d0fb57d27595 fc7735a2 console log report ci-freebsd-main
2020/10/11 20:24 freebsd 4d382a75c271 4a77ae0b console log report ci-freebsd-main
2020/10/06 04:42 freebsd 47705ebc6957 1880b4a9 console log report ci-freebsd-main
* Struck through repros no longer work on HEAD.