uvm_fault: ufsdirhash_lookup

Status: upstream: reported on 2026/03/26 23:00
Reported-by: syzbot+d1662df96d7c0eca078f@syzkaller.appspotmail.com
First crash: 148d, last: 6h48m

Sample crash report:
uvm_fault(0xfffff600769fb208, 0x3284, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      ufsdirhash_lookup+0x53d:        movl    0(%rax,%rcx,4),%r15d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
  62149  86998  32767        0x10          0    0  syz-executor
*409764  88829  32767        0x10          0    1K syz-executor
ufsdirhash_lookup(fffff6006ef9a198,ffff80002a213c05,fa,fffff6006ef9a27c,ffff8000357aa8a0,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391
ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214
VOP_LOOKUP(fffff600609db478,ffff8000357aab50,ffff8000357aab80) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000357aab20) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
namei(ffff8000357aab20) at namei+0x7c5 sys/kern/vfs_lookup.c:250
dofstatat(ffff80002a23b4d8,ffffff9c,7afcf7acc780,7afcf7accb80,2) at dofstatat+0xf2 sys/kern/vfs_syscalls.c:2025
syscall(ffff8000357aad90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000357aad90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7afcf7accc30, count: 7
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{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
*cpu1: uvm_fault(0xfffff600769fb208, 0x3284, 0, 1) -> e
ddb{1}> show kasan
No such command
ddb{1}> trace
ufsdirhash_lookup(fffff6006ef9a198,ffff80002a213c05,fa,fffff6006ef9a27c,ffff8000357aa8a0,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391
ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214
VOP_LOOKUP(fffff600609db478,ffff8000357aab50,ffff8000357aab80) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000357aab20) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
namei(ffff8000357aab20) at namei+0x7c5 sys/kern/vfs_lookup.c:250
dofstatat(ffff80002a23b4d8,ffffff9c,7afcf7acc780,7afcf7accb80,2) at dofstatat+0xf2 sys/kern/vfs_syscalls.c:2025
syscall(ffff8000357aad90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000357aad90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7afcf7accc30, count: -8
ddb{1}> show registers
rdi                                0
rsi                                0
rbp               0xffff8000357aa850
rbx               0xffff800000c43940
rdx                                0
rcx                             0xa1
rax                           0x3000    __ALIGN_SIZE+0x2000
r8                              0x30
r9                                 0
r10               0xadfaa0b6d124200a
r11               0xe93a4824ab738e5e
r12                            0x200
r13               0xffff80000166f200
r14                            0x1a1
r15                            0x200
rip               0xffffffff83179afd    ufsdirhash_lookup+0x53d
cs                               0x8
rflags                       0x10203    __ALIGN_SIZE+0xf203
rsp               0xffff8000357aa770
ss                              0x10
ufsdirhash_lookup+0x53d:        movl    0(%rax,%rcx,4),%r15d
ddb{1}> show proc
PROC (syz-executor) tid=409764 pid=88829 tcnt=1 stat=onproc
    flags process=10<SUGID> proc=0
    runpri=32, usrpri=50, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80002a23a548,0xffff80002a23b780
    process=0xffff800045ff04e8 user=0xffff8000357a5000, vmspace=0xfffff600769fb208
    estcpu=36, cpticks=5, pctcpu=0.2, user=0, sys=5, intr=0
ddb{1}> ps
   PID     TID   PPID   UID  S      PRLAGS     PFLAGS WAIT      COMMAND
 51197   92040  39044 32767  2        0x10          0           syz-executor
 51197  242684  39044 32767  3        0x10  0x4000080 ttyopn    syz-executor
 51197  228025  39044 32767  2        0x10  0x4000000           syz-executor
  7859  423449  73979 32767  3        0x10       0x80 nanoslp   syz-executor
  7859  282243  73979 32767  3        0x10  0x4000080 piperd    syz-executor
  7859  333106  73979 32767  3        0x10  0x4000080 fsleep    syz-executor
 86998   62149  11294 32767  7        0x10          0           syz-executor
 86998   17911  11294 32767  3        0x10  0x4000080 pipewr    syz-executor
 86998   60336  11294 32767  3        0x10  0x4000080 fsleep    syz-executor
 58293  447457   7844 32767  3        0x10       0x80 nanoslp   syz-executor
 58293   37562   7844 32767  3        0x10  0x4000080 kqsel     syz-executor
  7844  272465  48850 32767  3        0x10       0x80 nanoslp   syz-executor
 73979  219492  42731 32767  3        0x10       0x80 nanoslp   syz-executor
*88829  409764  46659 32767  7        0x10          0           syz-executor
 39044  197440  32378 32767  3        0x10       0x80 nanoslp   syz-executor
 11294  161754  60522 32767  3        0x10       0x80 nanoslp   syz-executor
  6771  296737    402 32767  3        0x10       0x80 nanoslp   syz-executor
 78586  235166  82632 32767  3        0x10       0x80 nanoslp   syz-executor
 42731  227562  53544     0  3         0x2       0x80 wait      syz-executor
 48850  452814  53544     0  3         0x2       0x80 wait      syz-executor
 32378  301665  53544     0  3         0x2       0x80 wait      syz-executor
 46659  387926  53544     0  3         0x2       0x80 wait      syz-executor
 60522  392437  53544     0  3         0x2       0x80 wait      syz-executor
   402  312001  53544     0  3         0x2       0x80 wait      syz-executor
 82632   53683  53544     0  3         0x2       0x80 wait      syz-executor
 53544  384962  69210     0  3         0x2       0x80 nanoslp   syz-executor
 69210  197767  34543     0  3    0x100002       0x88 sigsusp   ksh
 34543   28515  23917     0  3        0x10       0x88 kqread    sshd-session
 23917  155530  77845     0  3        0x12       0x80 kqread    sshd-session
 84822  154380      1     0  3    0x100003       0x80 ttyin     getty
 77845  277391      1     0  3           0       0x88 kqread    sshd
 51588  319227  34160    73  3   0x1100010       0x80 kqread    syslogd
 34160   10817      1     0  3    0x100002       0x80 sbwait    syslogd
 57328  398192      1     0  3    0x100000       0x80 kqread    resolvd
 59783   73882  21364    77  3    0x100012       0x80 kqread    dhcpleased
 70588  491544  21364    77  3    0x100012       0x80 kqread    dhcpleased
 21364  356750      1     0  3           0       0x80 kqread    dhcpleased
 90379  218888      0     0  3     0x14000      0x200 bored     smr
 71876  268317      0     0  2     0x14000      0x200           zerothread
 20728  244700      0     0  3     0x14000      0x200 aiodoned  aiodoned
 96472  380728      0     0  3     0x14000      0x200 syncer    update
 62470  507890      0     0  3     0x14000      0x200 cleaner   cleaner
 26060   81866      0     0  3     0x14000      0x200 reaper    reaper
 80098  446589      0     0  3     0x14000      0x200 pgdaemon  pagedaemon
 70303  372363      0     0  3     0x14000      0x200 bored     viomb
 38889  244126      0     0  3     0x14000 0x40000200 acpi0     acpi0
  7945  382569      0     0  3     0x14000 0x40000200           idle1
 42274  511556      0     0  3     0x14000      0x200 bored     softnet1
 73665  171922      0     0  3     0x14000      0x200 bored     softnet0
 21841  362062      0     0  3     0x14000      0x200 bored     systqmp
 34830   10751      0     0  3     0x14000      0x200 bored     systq
 77678  312159      0     0  3     0x14000      0x200 tmoslp    softclockmp
 87801  397684      0     0  3     0x14000 0x40000200 tmoslp    softclock
 83676  202811      0     0  3     0x14000 0x40000200           idle0
     1  142994      0     0  3         0x2       0x80 wait      init
     0       0     -1     0  3     0x10000      0x200 scheduler swapper
ddb{1}> show all locks
Process 88829 (syz-executor) thread 0xffff80002a23b4d8 (409764)
exclusive rwlock dirhash r = 0 (0xffff80000166f218)
#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  ufsdirhash_lookup+0x94 sys/ufs/ufs/ufs_dirhash.c:339
#3  ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214
#4  VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#5  vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#6  namei+0x7c5 sys/kern/vfs_lookup.c:250
#7  dofstatat+0xf2 sys/kern/vfs_syscalls.c:2025
#8  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#8  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#9  Xsyscall+0x128
exclusive rrwlock inode r = 0 (0xfffff6006ef9a238)
#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  rrw_enter+0xc6 sys/kern/kern_rwlock.c:621
#3  VOP_LOCK+0xbd sys/kern/vfs_vops.c:527
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:576
#5  vget+0x2a2 sys/kern/vfs_subr.c:692
#6  cache_lookup+0x351 sys/kern/vfs_cache.c:222
#7  ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160
#8  VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
#9  vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
#10 namei+0x7c5 sys/kern/vfs_lookup.c:250
#11 dofstatat+0xf2 sys/kern/vfs_syscalls.c:2025
#12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#13 Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839f3f40)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  dofstatat+0xe1 sys/kern/vfs_syscalls.c:2025
#2  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#2  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#3  Xsyscall+0x128
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11053  12017K   12034K 166960K     12147        0
            pcb    17     12K      12K 166960K        17        0
         rtable   223      6K       7K 166960K       374        0
             pf    29     16K      16K 166960K        31        0
         ifaddr    38      6K       7K 166960K        44        0
        ifgroup    46      2K       2K 166960K        50        0
         sysctl     2      1K       9K 166960K         6        0
       counters    68     36K      37K 166960K        70        0
       ioctlops     0      0K       4K 166960K        37        0
            iov     0      0K      16K 166960K        13        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1287     81K      81K 166960K      1405        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       5K 166960K         7        0
         VM map     2      1K       1K 166960K         2        0
            sem    14      1K       1K 166960K        16        0
        dirhash    15      2K       2K 166960K        18        0
           ACPI  1734    201K     291K 166960K     11964        0
      file desc    22     81K     129K 166960K       404        0
          sigio     0      0K       0K 166960K         7        0
           proc    64    131K     179K 166960K       525        0
        subproc    63      3K       4K 166960K       108        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     1      0K       0K 166960K        44        0
       in_multi    88      5K       7K 166960K       112        0
    ether_multi     1      0K       0K 166960K         5        0
            mrt     1      0K       0K 166960K         9        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    97    440K     440K 166960K        97        0
           exec     0      0K       1K 166960K       478        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   229    143K     194K 166960K      5305        0
       UVM aobj    15      2K       2K 166960K        15        0
     pinsyscall    43     86K     114K 166960K      1589        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K        12        0
            NDP    10      0K       2K 166960K        27        0
           temp    34   9122K    9142K 166960K      4928        0
         kqueue    14     22K      36K 166960K        95        0
      SYN cache     2     16K      16K 166960K         2        0
ddb{1}> 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       59    0       56     1     0     1     1     0     8    0
rtentry    176      118    0       15     6     0     6     6     0     8    0
unpcb      144      236    0      221     2     0     2     2     0     8    1
syncache   336       21    0       21     1     0     1     1     0     8    1
tcpcb      736      142    0      134     4     0     4     4     0     8    3
arp        136       18    0        2     1     0     1     1     0     8    0
inpcb      328      343    0      330     4     0     4     4     0     8    2
ip6q        80        2    0        2     1     0     1     1     0     8    1
ip6af       40        4    0        4     1     0     1     1     0     8    1
nd6        152       31    0        6     2     0     2     2     0     8    0
kcovpl      48       12    0        5     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      524    0       74    32     0    32    32     0     8    2
art_table   40      525    0       74     6     0     6     6     0     8    0
art_node    32      118    0       24     1     0     1     1     0     8    0
sysvmsgpl   40        1    0        0     1     0     1     1     0     8    0
semupl     112        1    0        1     1     0     1     1     0     8    1
semapl      72       13    0        1     1     0     1     1     0     8    0
shmpl      112       12    0        0     1     0     1     1     0     8    0
dirhash    1024      21    0        2     3     0     3     3     0     8    0
dino2pl    256     1914    0      441    93     0    93    93     0     8    0
ffsino     296     1914    0      441   114     0   114   114     0     8    0
nchpl      144     2534    0      835    63     0    63    63     0     8    0
vnodes     216     2031    0        0   113     0   113   113     0     8    0
namei      1024    8789    0     8788     2     0     2     2     0     8    1
percpumem   16       51    0        1     1     0     1     1     0     8    0
kstatmem   264       25    0        2     2     0     2     2     0     8    0
scxspl     216     8129    0     8129     4     3     1     3     1     8    1
plimitpl   152      283    0      259     2     0     2     2     0     8    1
sigapl     424      711    0      661     7     0     7     7     0     8    0
knotepl    120      345    0        0    11     0    11    11     0     8    0
kqueuepl   224      104    0       93     2     0     2     2     0     8    1
pipepl     344      204    0      175     6     0     6     6     0     8    3
fdescpl    528      695    0      661     4     0     4     4     0     8    0
filepl     160     3565    0     3359    12     0    12    12     0     8    2
lockfpl    104      119    0      117     1     0     1     1     0     8    0
lockfspl    48       33    0       31     1     0     1     1     0     8    0
sessionpl  144       82    0       66     1     0     1     1     0     8    0
pgrppl      48       97    0       74     1     0     1     1     0     8    0
ucredpl    104      575    0      557     1     0     1     1     0     8    0
zombiepl   144      663    0      661     1     0     1     1     0     8    0
processpl  1232     711    0      661     5     0     5     5     0     8    0
procpl     664     1163    0     1106     7     0     7     7     0     8    1
sosppl     176        2    0        2     1     0     1     1     0     8    1
sockpl     752      642    0      611     8     0     8     8     0     8    4
mcl64k     65536      4    0        0     1     0     1     1     0     8    0
mcl8k      8192       2    0        0     1     0     1     1     0     8    0
mcl4k      4096     113    0        0    15     0    15    15     0     8    0
mcl2k      2048      28    0        0     4     0     4     4     0     8    0
mextrefs    64       26    0        0     1     0     1     1     0     8    0
mtagpl      96        1    0        0     1     0     1     1     0     8    0
mbufpl     256     2218    0        0   139     0   139   139     0     8    0
bufpl      272     2649    0      102   170     0   170   170     0     8    0
anonpl      32     9905    0        0    80     0    80    80     0   247    0
amapchunkpl 152   16839    0    16318    35     0    35    35     0   158   12
amappl16   200     2029    0     2004    14     3    11    14     0     8    8
amappl15   192       64    0       64     1     1     0     1     0     8    0
amappl14   184      410    0      409     1     0     1     1     0     8    0
amappl13   176      160    0      150     1     0     1     1     0     8    0
amappl12   168      937    0      904     2     0     2     2     0     8    0
amappl11   160        1    0        1     1     1     0     1     0     8    0
amappl10   152       59    0       48     1     0     1     1     0     8    0
amappl9    144      269    0      269     1     1     0     1     0     8    0
amappl8    136      120    0      118     1     0     1     1     0     8    0
amappl7    128      161    0      150     1     0     1     1     0     8    0
amappl6    120      150    0      147     1     0     1     1     0     8    0
amappl5    112      157    0      149     1     0     1     1     0     8    0
amappl4    104      312    0      295     1     0     1     1     0     8    0
amappl3     96     2929    0     2829     5     1     4     4     0     8    1
amappl2     88      940    0      865     3     0     3     3     0     8    0
amappl1     80    15428    0    14871    19     0    19    19     0     8    3
amappl      88     4465    0     4298     5     0     5     5     0    92    0
uvmvnodes   80      103    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       14    0        0     1     0     1     1     0     8    0
uaddrrnd    24      695    0      661     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      695    0      661     1     0     1     1     0     8    0
vmmpekpl   168     9314    0     9272     3     0     3     3     0     8    0
vmmpepl    168    59443    0    57494   116     0   116   116     0   357   22
vmsppl     488      694    0      661     7     1     6     6     0     8    1
rwobjpl     80    21188    0    20240    29     0    29    29     0     8    4
pdppl      4096    1397    0     1322   113    26    87    99     0     8   12
pvpl        32    19396    0        0   157     0   157   157     0   265    0
pmappl     256      694    0      661     4     1     3     3     0     8    0
extentpl    40       46    0       28     1     0     1     1     0     8    0
phpool     112      586    0       29    16     0    16    16     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffffffff838d8ff0) 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(ffffffff839f3740) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff839f3740) at __mp_lock+0x192 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x7f52075694b0, count: 8
ddb{0}> trace
x86_ipi_db(ffffffff838d8ff0) 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(ffffffff839f3740) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline]
__mp_lock(ffffffff839f3740) at __mp_lock+0x192 sys/kern/kern_lock.c:173
softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83
dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862
Xsoftclock() at Xsoftclock+0x27
end of kernel
end trace frame: 0x7f52075694b0, count: -7
ddb{0}> machine ddbcpu 1
Stopped at      ufsdirhash_lookup+0x53d:        movl    0(%rax,%rcx,4),%r15d
ufsdirhash_lookup(fffff6006ef9a198,ffff80002a213c05,fa,fffff6006ef9a27c,ffff8000357aa8a0,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391
ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214
VOP_LOOKUP(fffff600609db478,ffff8000357aab50,ffff8000357aab80) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000357aab20) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
namei(ffff8000357aab20) at namei+0x7c5 sys/kern/vfs_lookup.c:250
dofstatat(ffff80002a23b4d8,ffffff9c,7afcf7acc780,7afcf7accb80,2) at dofstatat+0xf2 sys/kern/vfs_syscalls.c:2025
syscall(ffff8000357aad90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000357aad90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7afcf7accc30, count: 7
ddb{1}> trace
ufsdirhash_lookup(fffff6006ef9a198,ffff80002a213c05,fa,fffff6006ef9a27c,ffff8000357aa8a0,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391
ufs_lookup() at ufs_lookup+0xf76 sys/ufs/ufs/ufs_lookup.c:214
VOP_LOOKUP(fffff600609db478,ffff8000357aab50,ffff8000357aab80) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff8000357aab20) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580
namei(ffff8000357aab20) at namei+0x7c5 sys/kern/vfs_lookup.c:250
dofstatat(ffff80002a23b4d8,ffffff9c,7afcf7acc780,7afcf7accb80,2) at dofstatat+0xf2 sys/kern/vfs_syscalls.c:2025
syscall(ffff8000357aad90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff8000357aad90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7afcf7accc30, count: -8

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/22 10:20 openbsd 94b8f25de2d2 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: ufsdirhash_lookup
2026/08/16 14:13 openbsd 63d30f6f93ff 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: ufsdirhash_lookup
2026/07/21 14:10 openbsd 20200149c668 7c5de9c3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: ufsdirhash_lookup
2026/05/25 02:22 openbsd 3ca1fbf96c86 c69befb3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: ufsdirhash_lookup
2026/05/05 23:27 openbsd 83f5cd019021 340bcdf0 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: ufsdirhash_lookup
2026/03/26 22:59 openbsd 9c6370df4fcd 4b3d9a38 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: ufsdirhash_lookup
* Struck through repros no longer work on HEAD.