syzbot


uvm_fault: ufsdirhash_findfree

Status: upstream: reported on 2024/09/15 13:17
Reported-by: syzbot+61e3db374a375294c1aa@syzkaller.appspotmail.com
First crash: 58d, last: 58d

Sample crash report:
uvm_fault(0xffffffff8355a950, 0xffff8000134b2804, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      ufsdirhash_findfree+0x240:      movzwl  0x4(%r13),%r14d
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*171470  71135      0         0x2          0    0K syz-executor
 401221   5177      0         0x2        0x1    1  syz-executor
ufsdirhash_findfree(fffffd807e448880,1c,ffff800030dbd404) at ufsdirhash_findfree+0x240 sys/ufs/ufs/ufs_dirhash.c:517
ufs_lookup() at ufs_lookup+0xdfb sys/ufs/ufs/ufs_lookup.c:202
VOP_LOOKUP(fffffd806ee2fc00,ffff800030dbd740,ffff800030dbd770) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff800030dbd710) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
namei(ffff800030dbd710) at namei+0x7aa sys/kern/vfs_lookup.c:250
domkdirat(ffff800035b92a78,ffffff9c,7723e95a5410,1c0) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3084
syscall(ffff800030dbd8f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff800030dbd8f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7723e95a53d0, count: 7
https://www.openbsd.org/ddb.html describes the minimum info required in bug
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ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
*cpu0: uvm_fault(0xffffffff8355a950, 0xffff8000134b2804, 0, 1) -> d
ddb{0}> trace
ufsdirhash_findfree(fffffd807e448880,1c,ffff800030dbd404) at ufsdirhash_findfree+0x240 sys/ufs/ufs/ufs_dirhash.c:517
ufs_lookup() at ufs_lookup+0xdfb sys/ufs/ufs/ufs_lookup.c:202
VOP_LOOKUP(fffffd806ee2fc00,ffff800030dbd740,ffff800030dbd770) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff800030dbd710) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
namei(ffff800030dbd710) at namei+0x7aa sys/kern/vfs_lookup.c:250
domkdirat(ffff800035b92a78,ffffff9c,7723e95a5410,1c0) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3084
syscall(ffff800030dbd8f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff800030dbd8f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7723e95a53d0, count: -8
ddb{0}> show registers
rdi                                0
rsi                                0
rbp               0xffff800030dbd390
rbx                                0
rdx                                0
rcx               0xffff800035b92a78
rax               0xffffffff83464ff0    cpu_info_full_primary+0x1ff0
r8                0xffffffffffffffff
r9                0xfffffd807f7d3548
r10               0xf4892129f543fc3b
r11               0x4014fc7f3324a9fd
r12                             0x33
r13               0xffff8000134b2800
r14                                0
r15                            0x800
rip               0xffffffff8113ebb0    ufsdirhash_findfree+0x240
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff800030dbd310
ss                              0x10
ufsdirhash_findfree+0x240:      movzwl  0x4(%r13),%r14d
ddb{0}> show proc
PROC (syz-executor) tid=171470 pid=71135 tcnt=1 stat=onproc
    flags process=2<EXEC> proc=0
    runpri=86, usrpri=86, slppri=32, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff800035b92058,0xffffffff83515fb0
    process=0xffff80002d775b48 user=0xffff800030db8000, vmspace=0xfffffd806cf04c20
    estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0
ddb{0}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
*71135  171470   5177      0  7         0x2                syz-executor
  7738   61068  84519      0  3        0x80  nanoslp       syz-executor
  7738  510691  84519      0  3   0x4000080  ttyout        syz-executor
  7738  167905  84519      0  3   0x4000080  ttyout        syz-executor
  7738  343216  84519      0  3   0x4000080  fsleep        syz-executor
 33756  142660   6562      0  2       0x480                syz-executor
 33756   58079   6562      0  3   0x4000080  sbwait        syz-executor
 33756    2540   6562      0  3   0x4000080  fsleep        syz-executor
 41020   76892  61459     -1  3        0x90  nanoslp       syz-executor
 41020  510188  61459     -1  3   0x4000090  msgwait       syz-executor
 41020  105670  61459     -1  3   0x4000090  fsleep        syz-executor
 36771  291100  32923      0  3        0x80  nanoslp       syz-executor
 36771   27883  32923      0  3   0x4000080  kqread        syz-executor
 36771  485333  32923      0  3   0x4000080  fsleep        syz-executor
  6562  354412   5177      0  3        0x82  nanoslp       syz-executor
 84519  126070   5177      0  3        0x82  nanoslp       syz-executor
 61459   58314   5177      0  3        0x82  nanoslp       syz-executor
 32923  255473   5177      0  3        0x82  nanoslp       syz-executor
 67553  113946      0      0  3     0x14200  bored         sosplice
 17305  377147      0      0  3     0x14280  nfsidl        nfsio
 31883  234516      0      0  3     0x14280  nfsidl        nfsio
 77550  413754      0      0  3     0x14280  nfsidl        nfsio
 27589  369309      0      0  3     0x14280  nfsidl        nfsio
 56584   69577      0      0  3     0x14280  nfsidl        nfsio
 93469   92072      0      0  3     0x14280  nfsidl        nfsio
 39340  487091      0      0  3     0x14280  nfsidl        nfsio
 52457  189107      0      0  3     0x14280  nfsidl        nfsio
 43798  246724      0      0  3     0x14280  nfsidl        nfsio
  1062  165854      0      0  3     0x14280  nfsidl        nfsio
 61079  241808      0      0  3     0x14280  nfsidl        nfsio
 21727   49749      0      0  3     0x14280  nfsidl        nfsio
 47060  246490      0      0  3     0x14280  nfsidl        nfsio
 90839  412894      0      0  3     0x14280  nfsidl        nfsio
 79898  376408      0      0  3     0x14280  nfsidl        nfsio
 85725  473883      0      0  3     0x14280  nfsidl        nfsio
 66494  139327      0      0  3     0x14280  nfsidl        nfsio
 69573  486810      0      0  3     0x14280  nfsidl        nfsio
 53370  194621      0      0  3     0x14280  nfsidl        nfsio
 72932  342703      0      0  3     0x14280  nfsidl        nfsio
  5177  401221  80576      0  7         0x3                syz-executor
 80576  143615  30507      0  3    0x10008a  sigsusp       ksh
 30507  306274  88065      0  3        0x98  kqread        sshd-session
 88065    7366  66944      0  3        0x92  kqread        sshd-session
 68422  130008      1      0  3    0x100083  ttyin         getty
 66944  248263      1      0  3        0x88  kqread        sshd
 69429  146753  87170     74  3   0x1100092  bpf           pflogd
 87170  204436      1      0  3        0x80  sbwait        pflogd
 52925  243186  15286     73  3   0x1100090  kqread        syslogd
 15286  416623      1      0  3    0x100082  sbwait        syslogd
  2117  487788      1      0  3    0x100080  kqread        resolvd
 19342   33940  41129     77  3    0x100092  kqread        dhcpleased
 98177  402937  41129     77  3    0x100092  kqread        dhcpleased
 41129  117575      1      0  3        0x80  kqread        dhcpleased
 73832  142951      0      0  3     0x14200  bored         smr
 94774   11733      0      0  3     0x14200  pgzero        zerothread
 42223  484529      0      0  3     0x14200  aiodoned      aiodoned
 31785  424851      0      0  3     0x14200  syncer        update
 43428  401054      0      0  3     0x14200  cleaner       cleaner
 66820  141595      0      0  3     0x14200  reaper        reaper
 64277  356753      0      0  3     0x14200  pgdaemon      pagedaemon
 49553  237748      0      0  3     0x14200  bored         viomb
 95692  266731      0      0  3  0x40014200  acpi0         acpi0
 11482  300562      0      0  3  0x40014200                idle1
 31284   29203      0      0  3     0x14200  bored         softnet3
 42831  440472      0      0  3     0x14200  bored         softnet2
 45485  277622      0      0  3     0x14200  bored         softnet1
 33422   14073      0      0  2     0x14200                softnet0
  9916  442887      0      0  3     0x14200  bored         systqmp
 36459    7485      0      0  3     0x14200  bored         systq
 33672  331061      0      0  3     0x14200  tmoslp        softclockmp
 84040  394421      0      0  3  0x40014200  tmoslp        softclock
 15453  236887      0      0  3  0x40014200                idle0
     1  496663      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{0}> show all locks
Process 71135 (syz-executor) thread 0xffff800035b92a78 (171470)
exclusive rrwlock inode r = 0 (0xfffffd807e448918)
#0  witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1  rw_enter+0x41b sys/kern/kern_rwlock.c:309
#2  rrw_enter+0xbe sys/kern/kern_rwlock.c:464
#3  VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
#4  vn_lock+0xa4 sys/kern/vfs_vnops.c:564
#5  vfs_lookup+0x109 sys/kern/vfs_lookup.c:418
#6  namei+0x7aa sys/kern/vfs_lookup.c:250
#7  domkdirat+0x8b sys/kern/vfs_syscalls.c:3084
#8  syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#8  syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
#9  Xsyscall+0x128
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83513ac8)
#0  witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5b8 sys/kern/subr_witness.c:1151
#1  syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
#1  syscall+0xad6 sys/arch/amd64/amd64/trap.c:577
#2  Xsyscall+0x128
ddb{0}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10227  10169K   10430K 166960K     12239        0
            pcb    18     12K      12K 166960K       139        0
         rtable   193      6K       8K 166960K      2461        0
             pf    36     18K      22K 166960K       225        0
         ifaddr    39      7K       9K 166960K       337        0
        ifgroup    58      2K       2K 166960K       372        0
         sysctl     2      0K       0K 166960K         4        0
       counters    64     36K      36K 166960K       224        0
       ioctlops     0      0K       4K 166960K      1607        0
            iov     0      0K      28K 166960K        62        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1477     93K      93K 166960K      2895        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       9K 166960K        12        0
         VM map     2      1K       1K 166960K         2        0
            sem    17      5K       5K 166960K        91        0
        dirhash    15      2K       2K 166960K        21        0
           ACPI  1690    195K     286K 166960K     12418        0
      file desc    14     46K      97K 166960K      1804        0
          sigio     0      0K       0K 166960K         7        0
           proc    72     91K     140K 166960K      2498        0
        subproc    91      5K       7K 166960K       989        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K       221        0
       in_multi    85      6K       7K 166960K       873        0
    ether_multi     1      0K       0K 166960K         7        0
            mrt     0      0K       0K 166960K         4        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys   229   1023K    1023K 166960K       229        0
           exec     0      0K       1K 166960K      1407        0
     pfkey data     0      0K       0K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   220     65K      91K 166960K     14353        0
       UVM aobj    48      4K       4K 166960K        50        0
     pinsyscall    39     78K     106K 166960K      4663        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
    ip6_options     0      0K       0K 166960K        33        0
            NDP    18      0K       1K 166960K       246        0
           temp    53   6818K    6894K 166960K     65219        0
         kqueue    13     20K      29K 166960K       147        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       24    0        0     1     0     1     1     0     8    0
rtpcb      120      246    0      243     2     1     1     2     0     8    0
rtentry    112      880    0      792     4     1     3     4     0     8    0
unpcb      144      877    0      858    15    14     1     7     0     8    0
syncache   336        8    0        8     4     4     0     1     0     8    0
tcpqe       32        5    0        5     2     2     0     1     0     8    0
tcpcb      808      300    0      292    12    10     2     7     0     8    0
arp        120      158    0      142     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      336     1272    0     1259    28    26     2    10     0     8    0
nd6        136      231    0      210     1     0     1     1     0     8    0
pkpcb       40        2    0        2     2     2     0     1     0     8    0
kcovpl      48       76    0       69     1     0     1     1     0     8    0
ppxss      1168       5    0        5     3     3     0     1     0     8    0
pfstscr     40        2    0        2     2     1     1     1     0     8    1
pffrag     232        7    0        4     2     1     1     1     0   482    0
pffrnode    88        7    0        4     2     1     1     1     0     8    0
pffrent     40       11    0        8     2     1     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
pfanchor   1288       1    0        0     1     0     1     1     0     8    0
pftag       88        2    0        0     1     0     1     1     0     8    0
pfstitem    24      138    0      106     1     0     1     1     0     8    0
pfstkey    128      144    0      112     2     0     2     2     0     8    0
pfstate    376      141    0      109     5     0     5     5     0     8    0
pfrule     1344      25    0       20     2     1     1     2     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256     3530    0     3155    35     8    27    29     0     8    0
art_table   32     3531    0     3155     4     0     4     4     0     8    0
art_node    16      877    0      799     1     0     1     1     0     8    0
sysvmsgpl   40       13    0       10     3     2     1     1     0     8    0
semupl     112        2    0        2     2     2     0     1     0     8    0
semapl     112       87    0       72     1     0     1     1     0     8    0
shmpl      112       47    0        2     2     0     2     2     0     8    0
dirhash    1024      23    0        4     3     0     3     3     0     8    0
dino2pl    256     2861    0     1217   103     0   103   103     0     8    0
ffsino     272     2862    0     1218   110     0   110   110     0     8    0
nchpl      144     3991    0     2213    67     0    67    67     0     8    0
uvmvnodes   80     4273    0        0    88     0    88    88     0     8    0
vnodes     216     4273    0        0   238     0   238   238     0     8    0
namei      1024   20591    0    20590     7     6     1     2     0     8    0
percpumem   16      126    0       80     1     0     1     1     0     8    0
kstatmem   264      184    0      160     2     0     2     2     0     8    0
scxspl     216    41958    0    41958    11    10     1     8     1     8    1
plimitpl   152      380    0      359     1     0     1     1     0     8    0
sigapl     424     1991    0     1924    11     2     9     9     0     8    0
futexpl     64    10395    0    10391     7     6     1     1     0     8    0
knotepl    120      452    0        0    12     1    11    12     0     8    0
kqueuepl   216      325    0      315     9     7     2     5     0     8    1
pipepl     320      385    0      358     3     0     3     3     0     8    0
fdescpl    496     1952    0     1924    10     5     5     6     0     8    0
filepl     152     9871    0     9624    34    22    12    18     0     8    1
lockfpl    104      271    0      264     1     0     1     1     0     8    0
lockfspl    48      118    0      113     1     0     1     1     0     8    0
sessionpl  144       94    0       85     1     0     1     1     0     8    0
pgrppl      48      177    0      160     1     0     1     1     0     8    0
ucredpl    104     1375    0     1360     1     0     1     1     0     8    0
zombiepl   144     1927    0     1924     1     0     1     1     0     8    0
processpl  1160    1991    0     1924     7     1     6     6     0     8    0
procpl     648     3142    0     3066    12     4     8     8     0     8    0
srpgc       96        2    0        2     2     2     0     1     0     8    0
sosppl     168        3    0        3     1     1     0     1     0     8    0
sockpl     664     2405    0     2370    49    45     4    20     0     8    0
mcl64k     65536      3    0        0     1     0     1     1     0     8    0
mcl16k     16384      1    0        0     1     0     1     1     0     8    0
mcl12k     12288      1    0        0     1     0     1     1     0     8    0
mcl8k      8192       7    0        0     1     0     1     1     0     8    0
mcl4k      4096       6    0        0     1     0     1     1     0     8    0
mcl2k2     2112       1    0        0     1     0     1     1     0     8    0
mcl2k      2048     268    0        0    32     2    30    32     0     8    0
mtagpl      96       11    0        0     1     0     1     1     0     8    0
mbufpl     256      619    0        0    36     0    36    36     0     8    0
bufpl      280    10023    0     3239   485     0   485   485     0     8    0
anonpl      24   316887    0   311745   114    54    60    75     0   185   17
amapchunkpl 152   44748    0    44232    48    14    34    35     0   158   10
amappl16   200     5734    0     5686    76    60    16    21     0     8    9
amappl15   192        7    0        7     1     1     0     1     0     8    0
amappl14   184      256    0      244     1     0     1     1     0     8    0
amappl13   176       10    0       10     1     1     0     1     0     8    0
amappl12   168     3685    0     3658     4     2     2     3     0     8    0
amappl11   160       70    0       56     1     0     1     1     0     8    0
amappl10   152        9    0        9     1     1     0     1     0     8    0
amappl9    144      121    0      121     1     1     0     1     0     8    0
amappl8    136       25    0       22     1     0     1     1     0     8    0
amappl7    128      246    0      232     1     0     1     1     0     8    0
amappl6    120      846    0      844     1     0     1     1     0     8    0
amappl5    112      409    0      397     1     0     1     1     0     8    0
amappl4    104      524    0      503     1     0     1     1     0     8    0
amappl3     96     8480    0     8385     6     2     4     4     0     8    1
amappl2     88     1674    0     1606     2     0     2     2     0     8    0
amappl1     80    17574    0    17016    15     1    14    14     0     8    0
amappl      88    13397    0    13239     7     2     5     5     0    92    0
dma32768   32768      1    0        1     1     1     0     1     0     8    0
dma16384   16384      1    0        1     1     0     1     1     0     8    1
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       49    0        2     1     0     1     1     0     8    0
uaddrrnd    24     1953    0     1925     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24     1953    0     1925     1     0     1     1     0     8    0
vmmpekpl   168    17791    0    17730     4     0     4     4     0     8    0
vmmpepl    168   127700    0   125974   135    38    97   100     0   357    9
vmsppl     440     1952    0     1925     6     2     4     5     0     8    0
rwobjpl     56    42621    0    37361    85     6    79    79     0     8    2
pdppl      4096    3913    0     3850   191   114    77    87     0     8   14
pvpl        32    31781    0        0   256     0   256   256     0   265    0
pmappl     248     1952    0     1925     3     0     3     3     0     8    0
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112      574    0      176    12     0    12    12     0     8    0
ddb{0}> machine ddbcpu 0
Invalid cpu 0
ddb{0}> trace
ufsdirhash_findfree(fffffd807e448880,1c,ffff800030dbd404) at ufsdirhash_findfree+0x240 sys/ufs/ufs/ufs_dirhash.c:517
ufs_lookup() at ufs_lookup+0xdfb sys/ufs/ufs/ufs_lookup.c:202
VOP_LOOKUP(fffffd806ee2fc00,ffff800030dbd740,ffff800030dbd770) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85
vfs_lookup(ffff800030dbd710) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566
namei(ffff800030dbd710) at namei+0x7aa sys/kern/vfs_lookup.c:250
domkdirat(ffff800035b92a78,ffffff9c,7723e95a5410,1c0) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3084
syscall(ffff800030dbd8f0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff800030dbd8f0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7723e95a53d0, count: -8
ddb{0}> machine ddbcpu 1
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:164
ktrgenio(ffff800029fd8f38,31,0,ffff800000a444c0,1d) at ktrgenio+0x238 sys/kern/kern_ktrace.c:258
dofilereadv(ffff800029fd8f38,31,ffff80002a03c658,0,ffff80002a03c710) at dofilereadv+0x42f sys/kern/sys_generic.c:268
sys_read(ffff800029fd8f38,ffff80002a03c7c0,ffff80002a03c710) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a03c7c0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a03c7c0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7cdcf23bbe40, count: 6
ddb{1}> trace
x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27
__sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:164
ktrgenio(ffff800029fd8f38,31,0,ffff800000a444c0,1d) at ktrgenio+0x238 sys/kern/kern_ktrace.c:258
dofilereadv(ffff800029fd8f38,31,ffff80002a03c658,0,ffff80002a03c710) at dofilereadv+0x42f sys/kern/sys_generic.c:268
sys_read(ffff800029fd8f38,ffff80002a03c7c0,ffff80002a03c710) at sys_read+0xa2 sys/kern/sys_generic.c:172
syscall(ffff80002a03c7c0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a03c7c0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x7cdcf23bbe40, count: -9

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/15 13:16 openbsd ceaa8a7a3bfc 08d8a733 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: ufsdirhash_findfree
* Struck through repros no longer work on HEAD.