witness: lock_object uninitialized: ADDR (6)

Status: upstream: reported on 2026/07/24 08:54
Reported-by: syzbot+7f96d1ae30eae229ea32@syzkaller.appspotmail.com
First crash: 56d, last: 10d
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd witness: lock_object uninitialized: ADDR (4) -1 1 357d 357d 0/4 auto-obsoleted due to no activity on 2025/12/25 23:24
openbsd witness: lock_object uninitialized: ADDR (5) -1 1 235d 235d 0/4 auto-obsoleted due to no activity on 2026/04/26 15:18
openbsd witness: lock_object uninitialized: ADDR (2) -1 1 1430d 1430d 0/4 auto-obsoleted due to no activity on 2023/01/17 13:32
openbsd witness: lock_object uninitialized: ADDR (3) -1 syz, C 6417 583d 1266d 0/4 auto-obsoleted due to no activity on 2025/05/07 22:43
openbsd witness: lock_object uninitialized: ADDR -1 71 1586d 1726d 0/4 auto-closed as invalid on 2022/08/14 06:12

Sample crash report:
witness: lock_object uninitialized: 0xffff800000c30029
Starting stack trace...
witness_checkorder(ffff800000c30029,9,0) at witness_checkorder+0x1a7 witness_debugger sys/kern/subr_witness.c:2573 [inline]
witness_checkorder(ffff800000c30029,9,0) at witness_checkorder+0x1a7 sys/kern/subr_witness.c:783
mtx_enter(ffff800000c30019) at mtx_enter+0x95 sys/kern/kern_lock.c:406
ifq_add_data(ffff800000c30001,fffff9006ccc2818) at ifq_add_data+0x31 sys/net/ifq.c:362
if_getdata(ffff800000c31000,fffff9006ccc2818) at if_getdata+0x244 sys/net/if.c:-1
rtm_ifchg(ffff800000c31000) at rtm_ifchg+0xfb sys/net/rtsock.c:1797
if_up(ffff800000c31000) at if_up+0x213 if_linkstate sys/net/if.c:1888 [inline]
if_up(ffff800000c31000) at if_up+0x213 sys/net/if.c:1856
loioctl(ffff800000c31000,8020690c,ffff80000164c400) at loioctl+0x146 sys/net/if_loop.c:291
in6_ifinit(ffff800000c31000,ffff80000164c400,1) at in6_ifinit+0x1ed sys/netinet6/in6.c:969
in6_update_ifa(ffff800000c31000,ffff80003c3bd3f8,0) at in6_update_ifa+0x1878 sys/netinet6/in6.c:722
in6_ifattach_loopback(ffff800000c31000) at in6_ifattach_loopback+0x1d0 sys/netinet6/in6_ifattach.c:338
in6_ifattach(ffff800000c31000) at in6_ifattach+0x202 sys/netinet6/in6_ifattach.c:376
in6_ioctl_change_ifaddr(8080691a,ffff80003c3bd660,ffff800000c31000) at in6_ioctl_change_ifaddr+0x609 sys/netinet6/in6.c:349
ifioctl(ffff800010fdb4a8,8080691a,ffff80003c3bd660,ffff800045feba10) at ifioctl+0x1714 pru_control sys/sys/protosw.h:353 [inline]
ifioctl(ffff800010fdb4a8,8080691a,ffff80003c3bd660,ffff800045feba10) at ifioctl+0x1714 sys/net/if.c:2554
sys_ioctl(ffff800045feba10,ffff80003c3bd840,ffff80003c3bd790) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c3bd840) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3bd840) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4d2d3828be0, count: 241
End of stack trace.
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> show kasan
No such command
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff800000c30029,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff800000c30019) at mtx_enter+0x95 sys/kern/kern_lock.c:406
ifq_add_data(ffff800000c30001,fffff9006ccc2818) at ifq_add_data+0x31 sys/net/ifq.c:362
if_getdata(ffff800000c31000,fffff9006ccc2818) at if_getdata+0x244 sys/net/if.c:-1
rtm_ifchg(ffff800000c31000) at rtm_ifchg+0xfb sys/net/rtsock.c:1797
if_up(ffff800000c31000) at if_up+0x213 if_linkstate sys/net/if.c:1888 [inline]
if_up(ffff800000c31000) at if_up+0x213 sys/net/if.c:1856
loioctl(ffff800000c31000,8020690c,ffff80000164c400) at loioctl+0x146 sys/net/if_loop.c:291
in6_ifinit(ffff800000c31000,ffff80000164c400,1) at in6_ifinit+0x1ed sys/netinet6/in6.c:969
in6_update_ifa(ffff800000c31000,ffff80003c3bd3f8,0) at in6_update_ifa+0x1878 sys/netinet6/in6.c:722
in6_ifattach_loopback(ffff800000c31000) at in6_ifattach_loopback+0x1d0 sys/netinet6/in6_ifattach.c:338
in6_ifattach(ffff800000c31000) at in6_ifattach+0x202 sys/netinet6/in6_ifattach.c:376
in6_ioctl_change_ifaddr(8080691a,ffff80003c3bd660,ffff800000c31000) at in6_ioctl_change_ifaddr+0x609 sys/netinet6/in6.c:349
ifioctl(ffff800010fdb4a8,8080691a,ffff80003c3bd660,ffff800045feba10) at ifioctl+0x1714 pru_control sys/sys/protosw.h:353 [inline]
ifioctl(ffff800010fdb4a8,8080691a,ffff80003c3bd660,ffff800045feba10) at ifioctl+0x1714 sys/net/if.c:2554
sys_ioctl(ffff800045feba10,ffff80003c3bd840,ffff80003c3bd790) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c3bd840) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3bd840) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4d2d3828be0, count: -17
ddb{0}> show registers
rdi                                0
rsi                          0x80000    acpi_pdirpa+0x6be71
rbp               0xffff80003c3bcde0
rbx                                0
rdx               0xffff8000015fa340
rcx               0xffff800045feba10
rax                          0x7ffff    acpi_pdirpa+0x6be70
r8                0xffff80003c3bcd80
r9                0x8080808080808080
r10               0x49eacb2ef6f5be5d
r11               0x76bba91fabdfead4
r12               0xffff800000c300fe
r13                              0x9
r14               0xffff800000c30029
r15                              0x3
rip               0xffffffff826d0e95    db_enter+0x25
cs                               0x8
rflags                         0x246
rsp               0xffff80003c3bcdd0
ss                              0x10
db_enter+0x25:  addq    $0x8,%rsp
ddb{0}> show proc
PROC (syz-executor) tid=175077 pid=3153 tcnt=2 stat=onproc
    flags process=0 proc=4000000<THREAD>
    runpri=32, usrpri=83, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff800045feb778,0xffff800045fe2d30
    process=0xffff800045fe4020 user=0xffff80003c3b8000, vmspace=0xfffff9006c77a5d8
    estcpu=33, cpticks=19, pctcpu=0.0, user=0, sys=19, intr=0
ddb{0}> ps
   PID     TID   PPID   UID  S      PRLAGS     PFLAGS WAIT      COMMAND
 98727  105342  56282     0  2         0x2          0           arp
 56282  403210  95959     0  3    0x100002       0x88 sigsusp   sh
 74597   11487  44144     0  2           0      0xc80           syz-executor
 74597  403785  44144     0  3           0  0x4000080 kqread    syz-executor
 74597  104559  44144     0  3           0  0x4000080 fsleep    syz-executor
 74597  338453  44144     0  3           0  0x4000080 fsleep    syz-executor
 57838   28707  79441     0  2           0          0           syz-executor
 57838  516652  79441     0  3           0  0x4000080 fsleep    syz-executor
 84234  458977  77603     0  2           0          0           syz-executor
 84234  274049  77603     0  3           0  0x4000080 sbwait    syz-executor
 69281   29745  48531     0  2           0          0           syz-executor
 69281  471677  48531     0  3           0  0x4000080 fsleep    syz-executor
  3153  473872  94341     0  2           0          0           syz-executor
* 3153  175077  94341     0  7           0  0x4000000           syz-executor
 95959  182938  73805     0  3         0x2       0x80 wait      syz-executor
 70778   13092  12017     0  2           0          0           syz-executor
 70778  172609  12017     0  3           0  0x4000080 sbwait    syz-executor
 70778  409205  12017     0  3           0  0x4000080 fsleep    syz-executor
 85032  318567  73805     0  2  0x10000002      0xc80           syz-executor
 44144  447154  73805     0  2         0x2      0xc80           syz-executor
 79441  454229  73805     0  2         0x2      0xc80           syz-executor
 48531  436231  73805     0  2         0x2      0xc80           syz-executor
 94341  282828  73805     0  7         0x2          0           syz-executor
 12017  219569  73805     0  2         0x2          0           syz-executor
 77603  275389  73805     0  2         0x2      0xc80           syz-executor
 73805  115761  94740     0  3         0x2       0x80 kqread    syz-executor
 94740  518085  28945     0  3    0x100002       0x88 sigsusp   ksh
 28945  475902  63125     0  3        0x10       0x88 kqread    sshd-session
 63125   39334  35539     0  3        0x12       0x80 kqread    sshd-session
 78490  337903      1     0  2    0x100003       0x80           getty
 35539  464922      1     0  3           0       0x88 kqread    sshd
 46584  295288  18532    74  3   0x1100012       0x80 bpf       pflogd
 18532  522952      1     0  3           0       0x80 sbwait    pflogd
 82285  430187   8030    73  2   0x1100010       0x80           syslogd
  8030  463020      1     0  3    0x100002       0x80 sbwait    syslogd
 68962   70810      1     0  3    0x100000       0x80 kqread    resolvd
 53580  231795   1202    77  3    0x100012       0x80 kqread    dhcpleased
 54123  247541   1202    77  3    0x100012       0x80 kqread    dhcpleased
  1202   42847      1     0  3           0       0x80 kqread    dhcpleased
 76659  340362      0     0  2     0x14000      0x200           smr
 20697  324368      0     0  2     0x14000      0x200           zerothread
  7342  196255      0     0  3     0x14000      0x200 aiodoned  aiodoned
 24420  456105      0     0  2     0x14000      0xe00           update
  3495  222218      0     0  3     0x14000      0x200 cleaner   cleaner
 76118  509103      0     0  3     0x14000      0x200 reaper    reaper
 16464   58337      0     0  3     0x14000      0x200 pgdaemon  pagedaemon
 35709   62919      0     0  3     0x14000      0x200 bored     viomb
 63666  245079      0     0  3     0x14000 0x40000200 acpi0     acpi0
  5771  358944      0     0  3     0x14000 0x40000200           idle1
 58636    9504      0     0  3     0x14000      0x200 bored     softnet1
 72830  505787      0     0  2     0x14000      0x200           softnet0
 29869  519390      0     0  3     0x14000      0x200 smrbar    systqmp
 95313  312801      0     0  3     0x14000      0x200 bored     systq
 91085  129860      0     0  2     0x14000      0x200           softclockmp
 81183  365297      0     0  2     0x14000 0x40000200           softclock
  2623  327458      0     0  3     0x14000 0x40000200           idle0
     1  484210      0     0  3         0x2       0x80 wait      init
     0       0     -1     0  3     0x10000      0x200 scheduler swapper
ddb{0}> show all locks
Process 3153 (syz-executor) thread 0xffff800045feba10 (175077)
exclusive rwlock netlock r = 0 (0xffffffff83919610)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320
#2  in6_ioctl_change_ifaddr+0x10b sys/netinet6/in6.c:291
#3  ifioctl+0x1714 pru_control sys/sys/protosw.h:353 [inline]
#3  ifioctl+0x1714 sys/net/if.c:2554
#4  sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#5  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#6  Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83a28700)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  ifioctl+0x47f if_unit sys/net/if.c:-1 [inline]
#1  ifioctl+0x47f sys/net/if.c:2195
#2  sys_ioctl+0x674 sys/kern/sys_generic.c:-1
#3  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#3  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#4  Xsyscall+0x128
Process 29869 (systqmp) thread 0xffff800045ffecf8 (519390)
shared rwlock systqmp r = 0 (0xffffffff839c5698)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  taskq_thread+0x12a sys/kern/kern_task.c:442
#2  proc_trampoline+0x10
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11063  12088K   12280K 166960K     12238        0
            pcb    22     12K      12K 166960K        39        0
         rtable   195      6K       7K 166960K       726        0
             pf    37     18K      20K 166960K        84        0
         ifaddr    41      7K       7K 166960K        99        0
        ifgroup    59      2K       2K 166960K       121        0
         sysctl     1      1K       9K 166960K         7        0
       counters    72     37K      37K 166960K       104        0
       ioctlops     0      0K       4K 166960K      1509        0
            iov     0      0K      12K 166960K         5        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1295     81K      82K 166960K      1530        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K         4        0
         VM map     2      1K       1K 166960K         2        0
            sem     8      0K       0K 166960K        18        0
        dirhash    12      2K       2K 166960K        12        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    18     65K      89K 166960K       429        0
          sigio     0      0K       0K 166960K        65        0
           proc    72    115K     164K 166960K       887        0
        subproc    72      4K       4K 166960K       180        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K         9        0
       in_multi    75      5K       6K 166960K       222        0
    ether_multi     1      0K       0K 166960K         1        0
            mrt     0      0K       0K 166960K         8        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    55    254K     254K 166960K        55        0
           exec     0      0K       1K 166960K       538        0
   fusefs mount     1     32K      32K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   226    160K     167K 166960K      5091        0
       UVM aobj     6      2K       2K 166960K         6        0
     pinsyscall    43     86K     104K 166960K      1887        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K         1        0
            NDP    17      0K       1K 166960K        67        0
           temp    38   9114K    9138K 166960K     16395        0
         kqueue    15     24K      24K 166960K        34        0
      SYN cache     2     16K      16K 166960K         2        0
ddb{0}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       28    0        0     1     0     1     1     0     8    0
rtpcb      120       67    0       63     1     0     1     1     0     8    0
rtentry    176      237    0      154     5     0     5     5     0     8    0
unpcb      144      159    0      140     4     0     4     4     0     8    3
syncache   336        9    0        9     1     0     1     1     0     8    1
tcpcb      736       70    0       63     4     0     4     4     0     8    3
arp        136       41    0       26     1     0     1     1     0     8    0
inpcb      328      234    0      217     4     0     4     4     0     8    2
nd6        152       59    0       40     1     0     1     1     0     8    0
pkpcb       40        1    0        1     1     0     1     1     0     8    1
kcovpl      48       20    0       12     1     0     1     1     0     8    0
ppxss      1192       2    0        2     1     0     1     1     0     8    1
pffrag     232        5    0        1     1     0     1     1     0   482    0
pffrnode    88        3    0        0     1     0     1     1     0     8    0
pffrent     40       10    0        6     1     0     1     1     0     8    0
pfosfp      40     1428    0     1005     5     0     5     5     0     8    0
pfosfpen   112     1428    0      714    21     0    21    21     0     8    0
pfstitem    24       39    0        0     1     0     1     1     0     8    0
pfstkey    128       39    0        0     2     0     2     2     0     8    0
pfstate    448       38    0        0     5     0     5     5     0     8    0
pfrule     1360      23    0       18     2     1     1     2     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      956    0      584    29     0    29    29     0     8    3
art_table   40      957    0      584     5     0     5     5     0     8    0
art_node    32      237    0      144     1     0     1     1     0     8    0
sysvmsgpl   40        3    0        2     1     0     1     1     0     8    0
semapl      72       14    0        8     1     0     1     1     0     8    0
shmpl      112        3    0        0     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1773    0      279    94     0    94    94     0     8    0
ffsino     296     1773    0      279   115     0   115   115     0     8    0
nchpl      144     2147    0      404    65     0    65    65     0     8    0
vnodes     216     2003    0        0   112     0   112   112     0     8    0
namei      1024    8658    0     8658     4     1     3     3     0     8    3
percpumem   16       68    0       16     1     0     1     1     0     8    0
kstatmem   264       63    0       32     3     0     3     3     0     8    0
scsiplug    72        1    0        1     1     0     1     1     0     8    1
scxspl     216     9663    0     9663    10     2     8     8     1     8    8
plimitpl   152       84    0       67     1     0     1     1     0     8    0
sigapl     424      722    0      673     7     0     7     7     0     8    1
knotepl    120      168    0        0     6     0     6     6     0     8    0
kqueuepl   224       36    0       25     1     0     1     1     0     8    0
pipepl     344      173    0      145     3     0     3     3     0     8    0
fdescpl    528      706    0      674     3     0     3     3     0     8    0
filepl     160     2779    0     2550    15     1    14    14     0     8    2
lockfpl    104       35    0       32     1     0     1     1     0     8    0
lockfspl    48       17    0       14     1     0     1     1     0     8    0
sessionpl  144       43    0       34     1     0     1     1     0     8    0
pgrppl      48       63    0       46     1     0     1     1     0     8    0
ucredpl    104      284    0      271     1     0     1     1     0     8    0
zombiepl   144      674    0      673     1     0     1     1     0     8    0
processpl  1232     722    0      673     5     0     5     5     0     8    1
procpl     664      938    0      880     6     0     6     6     0     8    0
sockpl     752      462    0      422    10     0    10    10     0     8    5
mcl64k     65536      3    0        0     1     0     1     1     0     8    0
mcl12k     12288      1    0        0     1     0     1     1     0     8    0
mcl8k      8192       5    0        0     1     0     1     1     0     8    0
mcl4k      4096     116    0        0    15     0    15    15     0     8    0
mcl2k      2048      25    0        0     4     0     4     4     0     8    0
mextrefs    64       21    0        0     1     0     1     1     0     8    0
mtagpl      96        3    0        0     1     0     1     1     0     8    0
mbufpl     256      198    0        0    13     0    13    13     0     8    0
bufpl      272     3713    0      105   241     0   241   241     0     8    0
anonpl      32     7651    0        0    62     0    62    62     0   247    0
amapchunkpl 152   14192    0    13723    24     0    24    24     0   158    3
amappl16   200     1670    0     1649    15     3    12    14     0     8    8
amappl15   192       47    0       47     1     1     0     1     0     8    0
amappl14   184      566    0      564     1     0     1     1     0     8    0
amappl13   176      143    0      131     1     0     1     1     0     8    0
amappl12   168     1000    0      970     2     0     2     2     0     8    0
amappl11   160        6    0        6     1     1     0     1     0     8    0
amappl10   152       62    0       48     1     0     1     1     0     8    0
amappl9    144      281    0      280     1     0     1     1     0     8    0
amappl8    136      148    0      146     1     0     1     1     0     8    0
amappl7    128      170    0      156     1     0     1     1     0     8    0
amappl6    120      272    0      270     1     0     1     1     0     8    0
amappl5    112       99    0       87     1     0     1     1     0     8    0
amappl4    104      334    0      314     1     0     1     1     0     8    0
amappl3     96     2600    0     2504     3     0     3     3     0     8    0
amappl2     88      796    0      716     2     0     2     2     0     8    0
amappl1     80    12244    0    11637    15     0    15    15     0     8    2
amappl      88     4150    0     3996     4     0     4     4     0    92    0
uvmvnodes   80       99    0        0     3     0     3     3     0     8    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        5    0        0     1     0     1     1     0     8    0
uaddrrnd    24      706    0      674     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      706    0      674     1     0     1     1     0     8    0
vmmpekpl   168     7633    0     7574     3     0     3     3     0     8    0
vmmpepl    168    53821    0    51928    92     0    92    92     0   357    6
vmsppl     488      705    0      674     5     0     5     5     0     8    0
rwobjpl     80    17992    0    16957    26     0    26    26     0     8    0
pdppl      4096    1419    0     1348   105    30    75    85     0     8    4
pvpl        32    16424    0        0   134     1   133   133     0   265    0
pmappl     256      705    0      674     3     0     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      529    0       34    15     0    15    15     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(ffff800000c30029,9,0) at witness_checkorder+0x1ac sys/kern/subr_witness.c:-1
mtx_enter(ffff800000c30019) at mtx_enter+0x95 sys/kern/kern_lock.c:406
ifq_add_data(ffff800000c30001,fffff9006ccc2818) at ifq_add_data+0x31 sys/net/ifq.c:362
if_getdata(ffff800000c31000,fffff9006ccc2818) at if_getdata+0x244 sys/net/if.c:-1
rtm_ifchg(ffff800000c31000) at rtm_ifchg+0xfb sys/net/rtsock.c:1797
if_up(ffff800000c31000) at if_up+0x213 if_linkstate sys/net/if.c:1888 [inline]
if_up(ffff800000c31000) at if_up+0x213 sys/net/if.c:1856
loioctl(ffff800000c31000,8020690c,ffff80000164c400) at loioctl+0x146 sys/net/if_loop.c:291
in6_ifinit(ffff800000c31000,ffff80000164c400,1) at in6_ifinit+0x1ed sys/netinet6/in6.c:969
in6_update_ifa(ffff800000c31000,ffff80003c3bd3f8,0) at in6_update_ifa+0x1878 sys/netinet6/in6.c:722
in6_ifattach_loopback(ffff800000c31000) at in6_ifattach_loopback+0x1d0 sys/netinet6/in6_ifattach.c:338
in6_ifattach(ffff800000c31000) at in6_ifattach+0x202 sys/netinet6/in6_ifattach.c:376
in6_ioctl_change_ifaddr(8080691a,ffff80003c3bd660,ffff800000c31000) at in6_ioctl_change_ifaddr+0x609 sys/netinet6/in6.c:349
ifioctl(ffff800010fdb4a8,8080691a,ffff80003c3bd660,ffff800045feba10) at ifioctl+0x1714 pru_control sys/sys/protosw.h:353 [inline]
ifioctl(ffff800010fdb4a8,8080691a,ffff80003c3bd660,ffff800045feba10) at ifioctl+0x1714 sys/net/if.c:2554
sys_ioctl(ffff800045feba10,ffff80003c3bd840,ffff80003c3bd790) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80003c3bd840) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003c3bd840) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x4d2d3828be0, count: -17
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
ddb{1}> trace
x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__mp_lock(ffffffff83a27f00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff83a27f00) at __mp_lock+0x192 sys/kern/kern_lock.c:173
syscall(ffff80002a364e20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline]
syscall(ffff80002a364e20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7696e6df48b0, count: -6

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/08 15:48 openbsd 90a01398013e 351387c4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore witness: lock_object uninitialized: ADDR
2026/07/27 07:46 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 5ba6d07861fc 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan witness: lock_object uninitialized: ADDR
2026/07/26 20:53 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 5ba6d07861fc 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan witness: lock_object uninitialized: ADDR
2026/07/26 06:32 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 5ba6d07861fc 492bab15 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan witness: lock_object uninitialized: ADDR
2026/07/24 08:53 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 7c61c2d2eaf2 544adce9 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan witness: lock_object uninitialized: ADDR
* Struck through repros no longer work on HEAD.