syzbot


uvm_fault: bpfioctl (3)

Status: auto-obsoleted due to no activity on 2023/10/05 10:17
Reported-by: syzbot+0d56984887d27b1860eb@syzkaller.appspotmail.com
First crash: 382d, last: 382d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: bpfioctl C 14 1744d 1828d 3/3 fixed on 2019/10/22 13:03
openbsd uvm_fault: bpfioctl (4) 1 121d 121d 0/3 auto-obsoleted due to no activity on 2024/06/22 18:07
openbsd uvm_fault: bpfioctl (2) 2 664d 665d 0/3 auto-obsoleted due to no activity on 2022/12/27 04:23

Sample crash report:
uvm_fault(0xfffffd8069d66740, 0x28, 0, 1) -> e
kernel: page fault trap, code=0
Stopped at      bpfioctl+0xe44: movq    0x28(%rax),%rdi
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*253834  79354      0           0  0x4000000    0  syz-executor.3
bpfioctl(31700,20004269,ffff800023166bc0,2,ffff80002b416678) at bpfioctl+0xe44 sys/net/bpf.c:901
VOP_IOCTL(fffffd80761d96c0,20004269,ffff800023166bc0,2,fffffd807f7d75b0,ffff80002b416678) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd8068588260,20004269,ffff800023166bc0,ffff80002b416678) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525
sys_ioctl(ffff80002b416678,ffff800023166cd0,ffff800023166d20) at sys_ioctl+0x49e
syscall(ffff800023166da0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb6960cf1e40, count: 9
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> 
ddb> set $lines = 0
ddb> set $maxwidth = 0
ddb> show panic
*cpu0: uvm_fault(0xfffffd8069d66740, 0x28, 0, 1) -> e
ddb> trace
bpfioctl(31700,20004269,ffff800023166bc0,2,ffff80002b416678) at bpfioctl+0xe44 sys/net/bpf.c:901
VOP_IOCTL(fffffd80761d96c0,20004269,ffff800023166bc0,2,fffffd807f7d75b0,ffff80002b416678) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd8068588260,20004269,ffff800023166bc0,ffff80002b416678) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525
sys_ioctl(ffff80002b416678,ffff800023166cd0,ffff800023166d20) at sys_ioctl+0x49e
syscall(ffff800023166da0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb6960cf1e40, count: -6
ddb> show registers
rdi               0xffff800028010000
rsi                            0x7f4
rbp               0xffff8000231669f0
rbx                                0
rdx               0xffff800028010000
rcx                            0x7f3
rax                                0
r8                0xffffffff81bc30d0    uvm_map_inentry_pc
r9                                 0
r10               0xe87b5f05facbe924
r11               0xf0b8cd552549fac8
r12                                0
r13                                0
r14               0xffff800000d42800
r15                                0
rip               0xffffffff820a6f94    bpfioctl+0xe44
cs                               0x8
rflags                       0x10246    __ALIGN_SIZE+0xf246
rsp               0xffff800023166970
ss                              0x10
bpfioctl+0xe44: movq    0x28(%rax),%rdi
ddb> show proc
PROC (syz-executor.3) pid=253834 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=32, usrpri=84, nice=20
    forw=0xffffffffffffffff, list=0xffff80002b417158,0xffff8000216fe5a8
    process=0xffff800027fdc3f0 user=0xffff800023161000, vmspace=0xfffffd8069d66740
    estcpu=36, cpticks=1, pctcpu=0.0
    user=0, sys=1, intr=0
ddb> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 15636  253301  80657  60928  3      0x3010  suspend       syz-executor.4
 15636  430038  80657  60928  2   0x4081090                syz-executor.4
 15636  408249  80657  60928  2   0x4081090                syz-executor.4
 15636  200325  80657  60928  2   0x4081090                syz-executor.4
 60984  321441  17881      0  3        0x80  nanoslp       syz-executor.1
 60984  194817  17881      0  2   0x4000000                syz-executor.1
 70762  118917  75218      0  3        0x80  nanoslp       syz-executor.0
 70762  171542  75218      0  3   0x4000080  fsleep        syz-executor.0
 70762  341003  75218      0  2   0x4000000                syz-executor.0
 79354  457335  37252      0  3        0x80  nanoslp       syz-executor.3
 79354  390135  37252      0  2   0x4000000                syz-executor.3
*79354  253834  37252      0  7   0x4000000                syz-executor.3
 43622  409477  17650      0  3        0x82  piperd        syz-executor.7
 35340   26646  17650      0  3        0x82  piperd        syz-executor.2
 75218  142763  17650      0  2       0x482                syz-executor.0
 17881  176286  17650      0  2       0x482                syz-executor.1
 37252  280167  17650      0  2       0x482                syz-executor.3
 58066  378411  17650      0  2         0x2                syz-executor.6
 44610   41744  17650      0  3        0x82  piperd        syz-executor.5
 80657   61245  17650      0  2       0x482                syz-executor.4
 71920  170483      1      0  3    0x100083  ttyopn        getty
 30917  143088      0      0  3     0x14200  bored         sosplice
 17650  433696  81447      0  3        0x82  thrsleep      syz-fuzzer
 17650    3457  81447      0  3   0x4000082  nanoslp       syz-fuzzer
 17650  466478  81447      0  3   0x4000082  wait          syz-fuzzer
 17650  348977  81447      0  3   0x4000082  wait          syz-fuzzer
 17650  222960  81447      0  3   0x4000082  wait          syz-fuzzer
 17650  433691  81447      0  3   0x4000082  wait          syz-fuzzer
 17650  508153  81447      0  3   0x4000082  thrsleep      syz-fuzzer
 17650  395039  81447      0  2   0x4000002                syz-fuzzer
 17650  238164  81447      0  3   0x4000082  wait          syz-fuzzer
 17650  356344  81447      0  3   0x4000082  thrsleep      syz-fuzzer
 17650   17273  81447      0  3   0x4000082  thrsleep      syz-fuzzer
 17650  156442  81447      0  3   0x4000082  wait          syz-fuzzer
 17650   66212  81447      0  3   0x4000082  wait          syz-fuzzer
 17650  376690  81447      0  3   0x4000082  wait          syz-fuzzer
 81447  325590  82419      0  3    0x10008a  sigsusp       ksh
 82419   69311  79025      0  2        0x1a                sshd
 79025    7196      1      0  3        0x88  kqread        sshd
 52649  249246  46921     73  3   0x1100090  kqread        syslogd
 46921  193091      1      0  3    0x100082  netio         syslogd
 51489  124691      1      0  3    0x100080  kqread        resolvd
 42898  142248  97633     77  3    0x100092  kqread        dhcpleased
  8163  316202  97633     77  3    0x100092  kqread        dhcpleased
 97633  242079      1      0  3        0x80  kqread        dhcpleased
 73723  378811      0      0  3     0x14200  bored         smr
  3334  310387      0      0  2     0x14200                zerothread
 98455  205606      0      0  3     0x14200  aiodoned      aiodoned
 89883  118713      0      0  3     0x14200  syncer        update
 49675  520052      0      0  3     0x14200  cleaner       cleaner
 71510  417268      0      0  3     0x14200  reaper        reaper
 80925  201747      0      0  3     0x14200  pgdaemon      pagedaemon
 37033  208203      0      0  3     0x14200  bored         viomb
 45218  280970      0      0  3  0x40014200  acpi0         acpi0
 11620  335776      0      0  3     0x14200  bored         softnet3
 25172  199201      0      0  3     0x14200  bored         softnet2
 82594  220158      0      0  3     0x14200  bored         softnet1
 15772   64408      0      0  2     0x14200                softnet0
 89925  350590      0      0  3     0x14200  bored         systqmp
  4087   53388      0      0  3     0x14200  bored         systq
 76381  232436      0      0  2  0x40014200                softclock
 71532  123439      0      0  3  0x40014200                idle0
     1  343964      0      0  3     0x80082  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb> show all locks
No such command
ddb> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10197   6695K    7213K  78643K     29080        0
            pcb    15     18K      21K  78643K      3145        0
         rtable   178     16K      18K  78643K      4205        0
             pf    47     12K    1039K  78643K      7697        0
         ifaddr    39     13K      16K  78643K       708        0
        ifgroup    62      2K       2K  78643K      1290        0
         sysctl     3      1K       1K  78643K         3        0
       counters    28     17K      17K  78643K       603        0
       ioctlops     0      0K       2K  78643K      1645        0
            iov     0      0K      28K  78643K      2344        0
          mount     1      1K       1K  78643K         1        0
            log     0      0K       0K  78643K         4        0
         vnodes  1564     98K      98K  78643K     11484        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       9K  78643K       135        0
         VM map     2      1K       1K  78643K         2        0
            sem    12      1K       1K  78643K      2951        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12548        0
      file desc    14     49K      73K  78643K     14053        0
          sigio     0      0K       0K  78643K       243        0
           proc    58     59K      75K  78643K      3042        0
        subproc   104      6K       7K  78643K      1118        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
    ip_moptions     0      0K       0K  78643K       518        0
       in_multi    70      5K       7K  78643K      1411        0
    ether_multi     1      0K       0K  78643K        90        0
            mrt     1      0K       0K  78643K        79        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    97    440K     440K  78643K        97        0
           exec     0      0K       1K  78643K      3060        0
     pfkey data     0      0K       0K  78643K        13        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      64K  78643K        10        0
       UVM amap   377     96K     110K  78643K    131756        0
       UVM aobj   131      4K       4K  78643K       131        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
    ip6_options     0      0K       0K  78643K       643        0
            NDP    14      0K       1K  78643K       499        0
           temp    74   5856K   14052K  78643K    146748        0
         kqueue    12     18K      28K  78643K      1138        0
      SYN cache     2     56K      64K  78643K         4        0
ddb> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
rtpcb      120     1067    0     1064    12    11     1     3     0     8    0
rtentry    112     1196    0     1125     5     2     3     4     0     8    0
unpcb      144    14349    0    14336   163   160     3     9     0     8    2
syncache   296       77    0       77    19    18     1     1     0     8    1
tcpqe       32      305    0      305    15    14     1     1     0     8    1
tcpcb      808     4236    0     4225   136   133     3    11     0     8    0
arp         88      183    0      171     1     0     1     1     0     8    0
ipq         40        8    0        6     4     3     1     1     0     8    0
ipqe        40       15    0       11     4     3     1     1     0     8    0
inpcb      336    14350    0    14334   215   212     3    13     0     8    0
nd6        104      275    0      260     1     0     1     1     0     8    0
pkpcb       40       95    0       95     7     6     1     1     0     8    1
kcovpl      48       86    0       78     1     0     1     1     0     8    0
mppekey    1024      11    0       11     4     4     0     1     0     8    0
ppxss      1160     407    0      407    30    29     1     1     0     8    1
pppxif     1360     250    0      250    12    12     0     1     0     8    0
pfstscr     40      120    0      111     1     0     1     1     0     8    0
pfosfp      40        5    0        3     1     0     1     1     0     8    0
pfosfpen   112        5    0        3     1     0     1     1     0     8    0
pfanchor   1288     788  166      276    47     4    43    43     0     8    0
pfstitem    24       28    0       10     1     0     1     1     0     8    0
pfstkey    128      298    0      285     1     0     1     1     0     8    0
pfstate    344      187    0      177     7     6     1     2     0     8    0
rttmr      136       16    0       16     6     5     1     1     0     8    1
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256     5246    0     4905    64    41    23    30     0     8    0
art_table   32     5247    0     4905     5     1     4     4     0     8    0
art_node    16     1136    0     1075     1     0     1     1     0     8    0
semapl     112     2949    0     2939     1     0     1     1     0     8    0
shmpl      112      128    0        0     4     0     4     4     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256    19610    0    18123    94     0    94    94     0     8    0
ffsino     240    19610    0    18123    88     0    88    88     0     8    0
nchpl      144    42526    0    42018    63    41    22    63     0     8    0
rtmask      32       10    0       10     4     4     0     1     0     8    0
uvmvnodes   80    27894    0        0   570     0   570   570     0     8    0
vnodes     216    27894    0        0  1550     0  1550  1550     0     8    0
namei      1024  158786    0   158786    12    11     1     3     0     8    1
kstatmem   264      632    0      604     4     1     3     3     0     8    0
scxspl     216   106911    0   106911    28    27     1     8     0     8    1
plimitpl   152     1725    0     1710     1     0     1     1     0     8    0
sigapl     424    14260    0    14218    11     3     8     8     0     8    0
futexpl     64   144849    0   144845     2     1     1     1     0     8    0
knotepl    120   310336    0   310255   186   176    10    20     0     8    4
kqueuepl   184     3083    0     3075    54    51     3     6     0     8    2
pipepl     288     3090    0     3062    81    76     5    11     0     8    2
fdescpl    432    14180    0    14155     4     0     4     4     0     8    0
filepl     120   117274    0   117034   171   158    13    17     0     8    5
lockfpl    104     3564    0     3562     6     5     1     2     0     8    0
lockfspl    48     1085    0     1083     1     0     1     1     0     8    0
sessionpl  144      102    0       86     1     0     1     1     0     8    0
pgrppl      48      176    0      160     1     0     1     1     0     8    0
ucredpl    104    15132    0    15118     1     0     1     1     0     8    0
zombiepl   144    14218    0    14218     3     2     1     1     0     8    1
processpl  1008   14260    0    14218    13     4     9     9     0     8    0
procpl     696    36489    0    36426    34    26     8    10     0     8    0
sosppl     168      137    0      136    21    20     1     1     0     8    0
sockpl     456    29909    0    29877   767   755    12    38     0     8    6
mcl64k     65536    670    0      668    28    27     1     1     0     8    0
mcl16k     16384    336    0      336    32    31     1     1     0     8    1
mcl12k     12288    506    0      506    29    28     1     1     0     8    1
mcl9k      9216     229    0      229    35    34     1     1     0     8    1
mcl8k      8192    1311    0     1311    19    18     1     1     0     8    1
mcl4k      4096    1480    0     1480    14    13     1     1     0     8    1
mcl2k2     2112      87    0       87    35    34     1     1     0     8    1
mcl2k      2048  102339    0   102292    51    43     8    29     0     8    1
mtagpl      96     1647    0     1475    21    15     6     7     0     8    0
mbufpl     256   334623    0   334372  1201  1180    21   278     0     8    1
bufpl      288    25816    0    19431   457     0   457   457     0     8    0
anonpl      24  1447695    0  1431751   201    92   109   122     0   188    0
amapchunkpl 152  424089    0   423195   148   110    38    50     0   158    0
amappl16   200    27240    0    26734   145   117    28    39     0     8    0
amappl15   192       14    0       14     1     1     0     1     0     8    0
amappl14   184      411    0      397     2     1     1     2     0     8    0
amappl13   176       19    0       19     3     3     0     1     0     8    0
amappl12   168    15985    0    15958     2     0     2     2     0     8    0
amappl11   160       53    0       41     1     0     1     1     0     8    0
amappl10   152      116    0      103     1     0     1     1     0     8    0
amappl9    144      268    0      267     2     1     1     2     0     8    0
amappl8    136      599    0      505     5     1     4     4     0     8    0
amappl7    128      125    0      107     1     0     1     1     0     8    0
amappl6    120      849    0      825     2     1     1     2     0     8    0
amappl5    112      712    0      705     1     0     1     1     0     8    0
amappl4    104     1892    0     1857     3     1     2     2     0     8    0
amappl3     96    81630    0    81551     4     1     3     3     0     8    0
amappl2     88    15002    0    14943     4     2     2     3     0     8    0
amappl1     80    64478    0    63973    23    11    12    22     0     8    0
amappl      88   130259    0   130022     7     0     7     7     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      130    0        0     3     0     3     3     0     8    0
uaddrrnd    24    14180    0    14155     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24    14180    0    14155     1     0     1     1     0     8    0
vmmpekpl   168   105938    0   105880     4     1     3     4     0     8    0
vmmpepl    168   882997    0   880725   380   259   121   135     0   357    0
vmsppl     368    14179    0    14155     3     0     3     3     0     8    0
rwobjpl     24   228214    0   198631   179     0   179   179     0     8    0
pdppl      4096   28366    0    28310  1176  1112    64    68     0     8    8
pvpl        32  3889141    0  3868031   473   288   185   332     0   265    0
pmappl     216    14179    0    14155     2     0     2     2     0     8    0
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112     3694    0     2915    29     4    25    28     0     8    0
ddb> machine ddbcpu 0
No such command
ddb> trace
bpfioctl(31700,20004269,ffff800023166bc0,2,ffff80002b416678) at bpfioctl+0xe44 sys/net/bpf.c:901
VOP_IOCTL(fffffd80761d96c0,20004269,ffff800023166bc0,2,fffffd807f7d75b0,ffff80002b416678) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd8068588260,20004269,ffff800023166bc0,ffff80002b416678) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525
sys_ioctl(ffff80002b416678,ffff800023166cd0,ffff800023166d20) at sys_ioctl+0x49e
syscall(ffff800023166da0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb6960cf1e40, count: -6
ddb> machine ddbcpu 1
No such command
ddb> trace
bpfioctl(31700,20004269,ffff800023166bc0,2,ffff80002b416678) at bpfioctl+0xe44 sys/net/bpf.c:901
VOP_IOCTL(fffffd80761d96c0,20004269,ffff800023166bc0,2,fffffd807f7d75b0,ffff80002b416678) at VOP_IOCTL+0x91 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd8068588260,20004269,ffff800023166bc0,ffff80002b416678) at vn_ioctl+0xbb sys/kern/vfs_vnops.c:525
sys_ioctl(ffff80002b416678,ffff800023166cd0,ffff800023166d20) at sys_ioctl+0x49e
syscall(ffff800023166da0) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb6960cf1e40, count: -6

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/07 10:17 openbsd 4b04b6ae4aa8 22ae5830 .config console log report ci-openbsd-main uvm_fault: bpfioctl
* Struck through repros no longer work on HEAD.