syzbot


panic: tcpp_aonuitpc:u kt

Status: closed as dup on 2022/08/29 03:58
Reported-by: syzbot+e15ac21dd53ac9e7d697@syzkaller.appspotmail.com
First crash: 691d, last: 691d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
panic: tcp_output C 762 689d 691d

Sample crash report:
panic: tcpp_aonuitpc:u  kt
ernStopped at     db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*165655  64035  32767        0x10  0x4000000    0  syz-executor.3
 501794   1800      0     0x14000      0x200    1  reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68f9b6b3850, count: 6
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: tcp_output
 cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_map.c", line 2486
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68f9b6b3850, count: -9
ddb{0}> show registers
rdi                                0
rsi                              0x1
rbp               0xffff80002e4c7070
rbx               0xffffffff829a1b8f    cpu_info_full_primary+0x2b8f
rdx               0xffff800000be3580
rcx                                0
rax               0xffff800029a3a2a0
r8                 0x101010101010101
r9                0x8080808080808080
r10               0xe0d0bff94bb59795
r11               0x12352e22533b9099
r12               0xffffffff829a1990    cpu_info_full_primary+0x2990
r13                                0
r14                                0
r15                              0x1
rip               0xffffffff81a16d08    db_enter+0x18
cs                               0x8
rflags                         0x246
rsp               0xffff80002e4c7060
ss                              0x10
db_enter+0x18:  addq    $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor.3) pid=165655 stat=onproc
    flags process=10<SUGID> proc=4000000<THREAD>
    pri=32, usrpri=79, nice=20
    forw=0xffffffffffffffff, list=0xffff800029a60a90,0xffff800029a3ba50
    process=0xffff800029a0e580 user=0xffff80002e4c2000, vmspace=0xfffffd8070012180
    estcpu=36, cpticks=1, pctcpu=0.0
    user=0, sys=0, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 10871  379600  82669  32767  2        0x10                syz-executor.6
 10871  521758  82669  32767  3   0x4000090  fsleep        syz-executor.6
 48789  188911  51180  32767  2        0x10                syz-executor.2
 62533  120742  32081  32767  2        0x10                syz-executor.5
 62533  504520  32081  32767  3   0x4000090  fsleep        syz-executor.5
 62533  247320  32081  32767  3   0x4000090  fsleep        syz-executor.5
 13962  359224  52714  32767  2        0x10                syz-executor.7
 13962  168711  52714  32767  3   0x4000090  fsleep        syz-executor.7
 64035   35846  98765  32767  2        0x10                syz-executor.3
*64035  165655  98765  32767  7   0x4000010                syz-executor.3
 82404   62424  49087  32767  3        0x90  nanoslp       syz-executor.1
 49087  174381  59431      0  3        0x82  wait          syz-executor.1
 10616  500751      0      0  3     0x14200  bored         sosplice
 98765  278653  66929  32767  2        0x10                syz-executor.3
 82669   65544  48597  32767  3        0x90  nanoslp       syz-executor.6
 52714  475989  65857  32767  2        0x10                syz-executor.7
 65857  486969  59431      0  3        0x82  wait          syz-executor.7
 48597  403657  59431      0  3        0x82  wait          syz-executor.6
 32081  236241  50362  32767  3        0x90  nanoslp       syz-executor.5
 50362  442112  59431      0  3        0x82  wait          syz-executor.5
 51180     459   8226  32767  3        0x90  nanoslp       syz-executor.2
 66929   60483  59431      0  3        0x82  wait          syz-executor.3
 89036  328637  83051  32767  3        0x90  nanoslp       syz-executor.4
  8226  278723  59431      0  3        0x82  wait          syz-executor.2
 70565  183988  75210  32767  2        0x10                syz-executor.0
 83051   68158  59431      0  3        0x82  wait          syz-executor.4
 75210  267164  59431      0  3        0x82  wait          syz-executor.0
 59431  104741  25077      0  3        0x82  wait          syz-fuzzer
 59431  127489  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 59431  415367  25077      0  3   0x4000082  wait          syz-fuzzer
 59431  356509  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 59431  343087  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 59431  364357  25077      0  3   0x4000082  wait          syz-fuzzer
 59431  496093  25077      0  3   0x4000082  wait          syz-fuzzer
 59431  140180  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 59431  221774  25077      0  3   0x4000082  kqread        syz-fuzzer
 59431   72687  25077      0  3   0x4000082  wait          syz-fuzzer
 59431   10032  25077      0  3   0x4000082  wait          syz-fuzzer
 59431  289705  25077      0  3   0x4000082  wait          syz-fuzzer
 59431  430461  25077      0  3   0x4000082  wait          syz-fuzzer
 59431  206865  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 59431  233024  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 59431  262581  25077      0  3   0x4000082  thrsleep      syz-fuzzer
 25077  400560  65633      0  3    0x10008a  sigsusp       ksh
 65633  209502  78096      0  3        0x9a  kqread        sshd
 21416  148043      1      0  3    0x100083  ttyin         getty
 78096  354304      1      0  3        0x88  kqread        sshd
 17952   34324  64073     73  3   0x1100090  kqread        syslogd
 64073  156200      1      0  3    0x100082  netio         syslogd
 73156  284289      1      0  3    0x100080  kqread        resolvd
 71167  438811  88782     77  3    0x100092  kqread        dhcpleased
 46495  428690  88782     77  3    0x100092  kqread        dhcpleased
 88782   56157      1      0  3        0x80  kqread        dhcpleased
 76627   16827      0      0  3     0x14200  bored         smr
 63981   69587      0      0  2     0x14200                zerothread
 21266  118865      0      0  3     0x14200  aiodoned      aiodoned
 36371  443343      0      0  3     0x14200  syncer        update
 40176  368538      0      0  3     0x14200  cleaner       cleaner
  1800  501794      0      0  7     0x14200                reaper
 44371   82880      0      0  3     0x14200  pgdaemon      pagedaemon
 53403  224245      0      0  3     0x14200  bored         viomb
 74893  158192      0      0  3  0x40014200  acpi0         acpi0
 85467   91793      0      0  3  0x40014200                idle1
 15647    3050      0      0  3     0x14200  bored         softnet
 70334   94353      0      0  3     0x14200  bored         softnet
 42407  463923      0      0  3     0x14200  bored         softnet
 27147   58104      0      0  3     0x14200  bored         softnet
 69583  381825      0      0  3     0x14200  bored         systqmp
 67210  518064      0      0  3     0x14200  bored         systq
 66081  336646      0      0  3  0x40014200  bored         softclock
 50773  306469      0      0  3  0x40014200                idle0
     1  179201      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
CPU 1:
exclusive sched_lock &sched_lock r = 0 (0xffffffff82add530)
#0  witness_lock+0x44d
#1  wakeup_n+0x37
#2  uvm_pmr_freepages+0x306 sys/uvm/uvm_pmemrange.c:1304
#3  pmap_do_remove+0x666 sys/arch/amd64/amd64/pmap.c:1883
#4  uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:1891
#5  uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
#5  uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523
#6  uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
#7  reaper+0x19a sys/kern/kern_exit.c:448
#8  proc_trampoline+0x1c
exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82add780)
#0  witness_lock+0x44d
#1  mtx_enter_try+0x100
#2  mtx_enter+0x4b sys/kern/kern_lock.c:266
#3  uvm_pmr_freepages+0x10c sys/uvm/uvm_pmemrange.c:1289
#4  pmap_do_remove+0x666 sys/arch/amd64/amd64/pmap.c:1883
#5  uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:1891
#6  uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline]
#6  uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2523
#7  uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
#8  reaper+0x19a sys/kern/kern_exit.c:448
#9  proc_trampoline+0x1c
Process 64035 (syz-executor.3) thread 0xffff800029a3a2a0 (165655)
exclusive rwlock netlock r = 0 (0xffffffff8291ebe0)
#0  witness_lock+0x44d
#1  sosend+0x500 sys/kern/uipc_socket.c:632
#2  sendit+0x65d sys/kern/uipc_syscalls.c:694
#3  sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
#4  syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
#4  syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
#5  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10200   6410K    6419K  78643K     11297        0
            pcb    13     10K      12K  78643K        15        0
         rtable   240      6K       7K  78643K       527        0
         ifaddr    82     16K      16K  78643K        98        0
         sysctl     0      0K       2K  78643K         2        0
       counters    56     35K      35K  78643K        60        0
       ioctlops     0      0K       2K  78643K        35        0
            iov     0      0K      12K  78643K       392        0
          mount     1      1K       1K  78643K         1        0
            log     0      0K       0K  78643K         4        0
         vnodes  1271     79K      79K  78643K      2145        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       5K  78643K        20        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      1K       1K  78643K        14        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12548        0
      file desc    23     85K     125K  78643K      2118        0
          sigio     0      0K       0K  78643K        33        0
           proc    56     78K     103K  78643K       616        0
        subproc   104      6K       6K  78643K       130        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K       974        0
       in_multi    99      6K       6K  78643K       130        0
    ether_multi     1      0K       0K  78643K         1        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys   181    811K     811K  78643K       181        0
           exec     0      0K       2K  78643K       874        0
            tdb     3      0K       0K  78643K         3        0
        pagedep     1      8K       8K  78643K         1        0
       inodedep     1     32K      32K  78643K         1        0
         newblk     1      0K       0K  78643K         1        0
        VM swap     8     62K      62K  78643K         8        0
       UVM amap   296     91K     100K  78643K     14413        0
       UVM aobj    33      6K       6K  78643K        38        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K        60        0
            NDP    11      0K       2K  78643K        33        0
           temp   124   4726K    4790K  78643K      8046        0
         kqueue    12     18K      28K  78643K       211        0
      SYN cache     2     16K      16K  78643K         2        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       22    0        0     1     0     1     1     0     8    0
rtpcb      120      185    0      182     3     0     3     3     0     8    2
rtentry    112      138    0       25     4     0     4     4     0     8    0
unpcb      144     1640    0     1627    25    23     2     8     0     8    1
syncache   296       24    0       24     6     6     0     1     0     8    0
tcpqe       32       94    0       94     3     3     0     1     0     8    0
tcpcb      768     1261    0     1247    42    33     9    16     0     8    7
arp        120       23    0        4     1     0     1     1     0     8    0
ipq         40        1    0        1     1     1     0     1     0     8    0
ipqe        40        3    0        3     1     1     0     1     0     8    0
inpcb      368     2419    0     2408    45    36     9    13     0     8    7
nd6         48       34    0        8     1     0     1     1     0     8    0
kcovpl      48       10    0        2     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      572    0      110    30     0    30    30     0     8    1
art_table   32      573    0      110     4     0     4     4     0     8    0
art_node    16      137    0       34     1     0     1     1     0     8    0
sysvmsgpl   40        6    0        3     2     1     1     1     0     8    0
semupl     112        2    0        2     2     2     0     1     0     8    0
semapl     112       10    0        0     1     0     1     1     0     8    0
shmpl      112       35    0        5     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     4613    0     3181    90     0    90    90     0     8    0
ffsino     272     4613    0     3181    96     0    96    96     0     8    0
nchpl      144     7470    0     5828    63     0    63    63     0     8    0
uvmvnodes   80     4752    0        0    97     0    97    97     0     8    0
vnodes     216     4752    0        0   264     0   264   264     0     8    0
namei      1024   27897    0    27897     2     1     1     2     0     8    1
percpumem   16       42    0        2     1     0     1     1     0     8    0
kstatmem   264       26    0        4     2     0     2     2     0     8    0
scxspl     216    20151    0    20151    16    13     3     8     0     8    3
plimitpl   152      426    0      404     2     0     2     2     0     8    1
sigapl     424     2392    0     2337     7     0     7     7     0     8    0
futexpl     64    18680    0    18676     1     0     1     1     0     8    0
knotepl    120      202    0        0     5     0     5     5     0     8    0
kqueuepl   216      622    0      614    11    10     1     5     0     8    0
pipepl     320      485    0      457    14     8     6     8     0     8    3
fdescpl    496     2374    0     2340     7     2     5     6     0     8    0
filepl     152    18435    0    18197    41    24    17    18     0     8    7
lockfpl    104      168    0      165     1     0     1     1     0     8    0
lockfspl    48       80    0       77     1     0     1     1     0     8    0
sessionpl  144       25    0        9     1     0     1     1     0     8    0
pgrppl      48       39    0       23     1     0     1     1     0     8    0
ucredpl    104     5530    0     5512     1     0     1     1     0     8    0
zombiepl   144     2340    0     2337     1     0     1     1     0     8    0
processpl  1064    2392    0     2337     5     1     4     5     0     8    0
procpl     672     6508    0     6431    12     4     8     9     0     8    1
sosppl     168       30    0       30     5     5     0     1     0     8    0
sockpl     488     4296    0     4271   102    91    11    28     0     8    7
mcl64k     65536     11    0        0     2     0     2     2     0     8    0
mcl16k     16384     15    0        0     2     0     2     2     0     8    0
mcl12k     12288     17    0        0     2     0     2     2     0     8    0
mcl9k      9216       5    0        0     1     0     1     1     0     8    0
mcl8k      8192      17    0        0     3     0     3     3     0     8    0
mcl4k      4096      45    0        0     5     0     5     5     0     8    0
mcl2k2     2112       3    0        0     1     0     1     1     0     8    0
mcl2k      2048     253    0        0    31     0    31    31     0     8    0
mtagpl      96        2    0        0     1     0     1     1     0     8    0
mbufpl     256      418    0        0    23     0    23    23     0     8    0
bufpl      288     6642    0      312   453     0   453   453     0     8    0
anonpl      24   451063    0   438361   129    46    83   102     0   186    0
amapchunkpl 152   41451    0    40785    65    31    34    41     0   158    6
amappl16   200     6102    0     5741    43    21    22    33     0     8    0
amappl15   192      613    0      601     1     0     1     1     0     8    0
amappl14   184       32    0       28     1     0     1     1     0     8    0
amappl13   176      831    0      824     1     0     1     1     0     8    0
amappl12   168        6    0        3     1     0     1     1     0     8    0
amappl11   160      327    0      308     1     0     1     1     0     8    0
amappl10   152      258    0      252     1     0     1     1     0     8    0
amappl9    144      780    0      774     1     0     1     1     0     8    0
amappl8    136      673    0      588     3     0     3     3     0     8    0
amappl7    128      134    0      115     1     0     1     1     0     8    0
amappl6    120      493    0      479     2     1     1     2     0     8    0
amappl5    112     1855    0     1835     1     0     1     1     0     8    0
amappl4    104     1137    0     1110     2     1     1     2     0     8    0
amappl3     96     7249    0     7182     2     0     2     2     0     8    0
amappl2     88     1254    0     1211     5     4     1     2     0     8    0
amappl1     80    60200    0    59461    19     2    17    19     0     8    0
amappl      88    13853    0    13672     6     1     5     5     0    92    0
dma4096    4096       1    0        1     1     1     0     1     0     8    0
dma1024    1024       1    0        0     1     0     1     1     0     8    0
dma256     256        6    0        6     1     1     0     1     0     8    0
dma128     128      253    0      253     1     1     0     1     0     8    0
dma64       64        6    0        6     1     1     0     1     0     8    0
dma32       32        7    0        7     1     1     0     1     0     8    0
dma16       16       18    0       17     1     0     1     1     0     8    0
aobjpl      72       37    0        5     1     0     1     1     0     8    0
uaddrrnd    24     2375    0     2340     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     2375    0     2340     1     0     1     1     0     8    0
vmmpekpl   168    21904    0    21842     4     0     4     4     0     8    0
vmmpepl    168   233719    0   230992   159    30   129   137     0   357    1
vmsppl     368     2374    0     2340     4     0     4     4     0     8    0
rwobjpl     56    63451    0    57265    89     1    88    88     0     8    0
pdppl      4096    4757    0     4680   159    78    81    95     0     8    4
pvpl        32   950750    0   932895   266   109   157   239     0   265    3
pmappl     248     2374    0     2340     4     1     3     3     0     8    0
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112      952    0      117    24     0    24    24     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437
panic(ffffffff8257b2ef) at panic+0x177 sys/kern/subr_prf.c:198
tcp_output(ffff800000cd2748) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727
tcp_send(fffffd80661693e0,fffffd807021e500,0,fffffd8069b96100) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline]
sosend(fffffd80661693e0,0,ffff80002e4c7410,0,fffffd8069b96100,0) at sosend+0x62a sys/kern/uipc_socket.c:646
sendit(ffff800029a3a2a0,3,ffff80002e4c7590,0,ffff80002e4c7680) at sendit+0x65d sys/kern/uipc_syscalls.c:694
sys_sendmsg(ffff800029a3a2a0,ffff80002e4c7638,ffff80002e4c7680) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601
syscall(ffff80002e4c7700) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline]
syscall(ffff80002e4c7700) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x68f9b6b3850, count: -9
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771
comcnputc(800,6e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(6e) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(6e) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd8070012460) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd8070012460) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021232fc8) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: 1
ddb{1}> trace
x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x31 sys/arch/amd64/amd64/bus_space.c:771
comcnputc(800,6e) at comcnputc+0x128 bus_space_barrier machine/bus.h:481 [inline]
comcnputc(800,6e) at comcnputc+0x128 sys/dev/ic/com.c:1263
cnputc(6e) at cnputc+0x4b sys/dev/cons.c:218
db_putchar(6e) at db_putchar+0x3fc sys/ddb/db_output.c:155
kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064
db_printf(ffffffff8261b4d8) at db_printf+0x85 sys/kern/subr_prf.c:498
panic(ffffffff825a14be) at panic+0xd7 sys/kern/subr_prf.c:216
__assert(ffffffff82619d34,ffffffff826406ea,9b6,ffffffff825d59fb) at __assert+0x25 sys/kern/subr_prf.c:157
uvm_map_teardown(fffffd8070012460) at uvm_map_teardown+0x2e8 sys/uvm/uvm_map.c:2488
uvmspace_free(fffffd8070012460) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436
reaper(ffff800021232fc8) at reaper+0x19a sys/kern/kern_exit.c:448
end trace frame: 0x0, count: -14

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/08/28 09:28 openbsd 293c01dc0e68 07177916 .config console log report ci-openbsd-setuid panic: tcpp_aonuitpc:u kt
* Struck through repros no longer work on HEAD.