syzbot


protection_fault: sys_msgrcv (2)

Status: upstream: reported C repro on 2022/10/13 01:20
Reported-by: syzbot+c80235d951da9769a00f@syzkaller.appspotmail.com
First crash: 608d, last: 38d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd protection_fault: sys_msgrcv 1 845d 845d 0/3 auto-closed as invalid on 2022/05/19 20:14
Last patch testing requests (10)
Created Duration User Patch Repo Result
2024/06/10 18:15 0m retest repro openbsd error OK
2024/06/10 18:15 0m retest repro openbsd error OK
2024/06/10 18:08 0m retest repro openbsd error OK
2024/05/27 16:45 1m retest repro openbsd error OK
2024/04/30 00:17 18m retest repro openbsd OK log
2024/04/29 23:19 1m retest repro openbsd error OK
2024/04/01 18:13 0m retest repro openbsd error OK
2024/04/01 18:13 0m retest repro openbsd error OK
2024/04/01 17:23 44m retest repro openbsd error OK
2024/03/18 17:15 18m retest repro openbsd OK log

Sample crash report:
kernel: protection fault trap, code=0
Stopped at      sys_msgrcv+0x2df:       movq    0x10(%r13),%rdi
ddb{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}> show panic
the kernel did not panic
ddb{1}> trace
sys_msgrcv(ffff800021228dc0,ffff800021292f48,ffff800021292f90) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:639 [inline]
sys_msgrcv(ffff800021228dc0,ffff800021292f48,ffff800021292f90) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:349
syscall(ffff800021293010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff800021293010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfde9d7e32a0, count: -3
ddb{1}> show registers
rdi                           0x106e    __ALIGN_SIZE+0x6e
rsi                       0x20001cc8
rbp               0xffff800021292f30
rbx                           0x106e    __ALIGN_SIZE+0x6e
rdx               0xffff80002128e000
rcx                                0
rax                                0
r8                    0x7f7fffffc000
r9                               0x1
r10               0xae27abccbd36cb9d
r11                0xb85c92539cb0f97
r12               0xfffffd806aeddeb0
r13               0xdeafbeaddeafbead
r14               0xffff800000cde000
r15                              0x8
rip               0xffffffff81e3167f    sys_msgrcv+0x2df
cs                               0x8
rflags                       0x10202    __ALIGN_SIZE+0xf202
rsp               0xffff800021292ea0
ss                              0x10
sys_msgrcv+0x2df:       movq    0x10(%r13),%rdi
ddb{1}> show proc
PROC (syz-executor.0) pid=190987 stat=onproc
    flags process=0 proc=4000000<THREAD>
    pri=36, usrpri=50, nice=20
    forw=0xffffffffffffffff, list=0xffff800021228b08,0xffff800021228038
    process=0xffff8000ffff8438 user=0xffff80002128e000, vmspace=0xfffffd807effb898
    estcpu=0, cpticks=0, pctcpu=0.0
    user=0, sys=0, intr=0
ddb{1}> ps
   PID     TID   PPID    UID  S       FLAGS  WAIT          COMMAND
 35796   49712  48115      0  7           0                syz-executor.0
*35796  190987  48115      0  7   0x4000000                syz-executor.0
 35796  408506  48115      0  2   0x4000000                syz-executor.0
 35796  481239  48115      0  2   0x4000000                syz-executor.0
 35796  387443  48115      0  2   0x4000000                syz-executor.0
 48115  181645  42215      0  3        0x82  nanoslp       syz-executor.0
 42215  409598  73344      0  3        0x82  thrsleep      syz-execprog
 42215   46105  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215  362963  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215  305838  73344      0  3   0x4000082  kqread        syz-execprog
 42215  320101  73344      0  3   0x4000082  wait          syz-execprog
 42215    3983  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215  184328  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215   41461  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215  338953  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215  365758  73344      0  3   0x4000082  thrsleep      syz-execprog
 42215  143342  73344      0  3   0x4000082  thrsleep      syz-execprog
 73344  419509  44187      0  3    0x10008a  sigsusp       ksh
 44187   36383  71379      0  3        0x9a  kqread        sshd
 90615  345447      1      0  3    0x100083  ttyin         getty
 71379  451799      1      0  3        0x88  kqread        sshd
 49581  364376  85485     73  3   0x1100090  kqread        syslogd
 85485  105674      1      0  3    0x100082  netio         syslogd
 91461  264885      1      0  3    0x100080  kqread        resolvd
 37618  495946  73541     77  3    0x100092  kqread        dhcpleased
 79987  220223  73541     77  3    0x100092  kqread        dhcpleased
 73541  310255      1      0  3        0x80  kqread        dhcpleased
 71238   60340      0      0  3     0x14200  bored         smr
 66061  469804      0      0  2     0x14200                zerothread
 18349  484989      0      0  3     0x14200  aiodoned      aiodoned
 95651  265336      0      0  3     0x14200  syncer        update
 23814  330836      0      0  3     0x14200  cleaner       cleaner
  9306  135953      0      0  3     0x14200  reaper        reaper
 44958  173181      0      0  3     0x14200  pgdaemon      pagedaemon
 89722   33940      0      0  3     0x14200  bored         viomb
 70452  448284      0      0  3  0x40014200  acpi0         acpi0
 52736  266158      0      0  3  0x40014200                idle1
 41711   27585      0      0  3     0x14200  bored         softnet
 63790  286313      0      0  3     0x14200  bored         softnet
  6676  357033      0      0  3     0x14200  bored         softnet
 84284   97266      0      0  3     0x14200  bored         softnet
 96381  472575      0      0  3     0x14200  bored         systqmp
 37613   66116      0      0  3     0x14200  bored         systq
 78305  407064      0      0  3  0x40014200  bored         softclock
 34741  217830      0      0  3  0x40014200                idle0
     1  336461      0      0  3        0x82  wait          init
     0       0     -1      0  3     0x10200  scheduler     swapper
ddb{1}> show all locks
Process 35796 (syz-executor.0) thread 0xffff800021228dc0 (190987)
exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c2ca98)
#0  witness_lock+0x44d
#1  __mp_acquire_count+0x48 sys/kern/kern_lock.c:227
#2  mi_switch+0x3bb sys/kern/sched_bsd.c:405
#3  sleep_finish+0x180 sys/kern/kern_synch.c:417
#4  rw_enter+0x35a sys/kern/kern_rwlock.c:286
#5  uvmfault_lookup+0xc9 sys/uvm/uvm_fault.c:1773
#6  uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673
#7  uvm_fault+0xf2 sys/uvm/uvm_fault.c:601
#8  kpageflttrap+0x22e sys/arch/amd64/amd64/trap.c:284
#9  kerntrap+0xef sys/arch/amd64/amd64/trap.c:339
#10 alltraps_kern_meltdown+0x7b
#11 copyout+0x53
#12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
#12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625
#13 Xsyscall+0x128
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 10170   6392K    6421K  78643K     11260        0
            pcb    13      8K       8K  78643K        13        0
         rtable    80      2K       2K  78643K       139        0
         ifaddr    31     16K      16K  78643K        31        0
       counters    46     34K      34K  78643K        46        0
       ioctlops     0      0K       2K  78643K        20        0
          mount     1      1K       1K  78643K         1        0
            log     0      0K       0K  78643K         4        0
         vnodes  1167     73K      73K  78643K      1180        0
      UFS quota     1     32K      32K  78643K         1        0
      UFS mount     5     36K      36K  78643K         5        0
            shm     2      1K       1K  78643K         2        0
         VM map     2      1K       1K  78643K         2        0
            sem     2      0K       0K  78643K         2        0
        dirhash    12      2K       2K  78643K        12        0
           ACPI  1697    195K     286K  78643K     12548        0
      file desc     4      9K      13K  78643K        25        0
           proc    55     78K      91K  78643K       267        0
    NFS srvsock     1      0K       0K  78643K         1        0
     NFS daemon     1     16K      16K  78643K         1        0
       in_multi    22      1K       1K  78643K        22        0
    ether_multi     1      0K       0K  78643K         1        0
    ISOFS mount     1     32K      32K  78643K         1        0
  MSDOSFS mount     1     16K      16K  78643K         1        0
           ttys    25    122K     122K  78643K        25        0
           exec     0      0K       1K  78643K       271        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   157     14K      14K  78643K      2019        0
       UVM aobj     3      2K       2K  78643K         3        0
        memdesc     1      4K       4K  78643K         1        0
    crypto data     1      1K       1K  78643K         1        0
            NDP     4      0K       0K  78643K         6        0
           temp    26   5762K    5825K  78643K      3104        0
         kqueue    12     18K      18K  78643K        25        0
      SYN cache     2     16K      16K  78643K         2        0
ddb{1}> show all pools
Name      Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle
plcache    128       22    0        0     1     0     1     1     0     8    0
rtpcb      120       22    0       19     1     0     1     1     0     8    0
rtentry    112       34    0        1     1     0     1     1     0     8    0
unpcb      144       33    0       20     1     0     1     1     0     8    0
syncache   296        5    0        5     2     1     1     1     0     8    1
tcpqe       32       48    0       48     1     1     0     1     0     8    0
tcpcb      776        8    0        5     1     0     1     1     0     8    0
arp        120        4    0        0     1     0     1     1     0     8    0
inpcb      368       29    0       23     1     0     1     1     0     8    0
nd6         48        3    0        0     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      144    0        0     9     0     9     9     0     8    0
art_table   32      145    0        0     2     0     2     2     0     8    0
art_node    16       33    0        3     1     0     1     1     0     8    0
sysvmsgpl   40        6    0        6     1     0     1     1     0     8    1
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1448    0       53    88     0    88    88     0     8    0
ffsino     272     1448    0       53    94     0    94    94     0     8    1
nchpl      144     1687    0       66    61     0    61    61     0     8    0
uvmvnodes   80     1457    0        0    30     0    30    30     0     8    0
vnodes     216     1457    0        0    81     0    81    81     0     8    0
namei      1024    5167    0     5167     3     1     2     2     0     8    2
percpumem   16       36    0        0     1     0     1     1     0     8    0
kstatmem   264        8    0        0     1     0     1     1     0     8    0
scxspl     216     6232    0     6232    10     8     2     8     0     8    2
plimitpl   152       18    0       10     1     0     1     1     0     8    0
sigapl     424      339    0      307     5     0     5     5     0     8    1
futexpl     64       10    0       10     1     0     1     1     0     8    1
knotepl    120       66    0        0     2     0     2     2     0     8    0
kqueuepl   216       21    0       13     1     0     1     1     0     8    0
pipepl     320      107    0      100     3     1     2     2     0     8    1
fdescpl    496      322    0      307     5     1     4     4     0     8    2
filepl     152     1378    0     1313     4     0     4     4     0     8    1
lockfpl    104        6    0        4     1     0     1     1     0     8    0
lockfspl    48        4    0        2     1     0     1     1     0     8    0
sessionpl  144       18    0        9     1     0     1     1     0     8    0
pgrppl      48       18    0        9     1     0     1     1     0     8    0
ucredpl    104       66    0       56     1     0     1     1     0     8    0
zombiepl   144      307    0      307     2     1     1     1     0     8    1
processpl  1072     339    0      307     3     0     3     3     0     8    0
procpl     696      361    0      315     6     1     5     5     0     8    0
sockpl     488       84    0       62     3     0     3     3     0     8    0
mcl8k      8192       5    0        0     1     0     1     1     0     8    0
mcl4k      4096       4    0        0     1     0     1     1     0     8    0
mcl2k      2048     266    0        0    34     0    34    34     0     8    0
mtagpl      96        2    0        0     1     0     1     1     0     8    0
mbufpl     256      311    0        0    20     0    20    20     0     8    0
bufpl      288     3924    0      140   271     0   271   271     0     8    0
anonpl      24   110568    0   106442    67    12    55    55     0   186   28
amapchunkpl 152    5389    0     5072    22     1    21    21     0   158    8
amappl16   200     2199    0     2138    10     5     5     5     0     8    0
amappl15   192       11    0       11     1     1     0     1     0     8    0
amappl14   184      132    0      120     2     0     2     2     0     8    1
amappl13   176        5    0        4     2     1     1     1     0     8    0
amappl12   168      321    0      318     1     0     1     1     0     8    0
amappl11   160       44    0       34     1     0     1     1     0     8    0
amappl10   152       36    0       32     1     0     1     1     0     8    0
amappl9    144      944    0      944     2     1     1     1     0     8    1
amappl8    136       82    0       60     3     1     2     2     0     8    1
amappl7    128      128    0      113     2     0     2     2     0     8    0
amappl6    120      132    0      124     2     0     2     2     0     8    1
amappl5    112       95    0       87     1     0     1     1     0     8    0
amappl4    104      403    0      378     3     1     2     3     0     8    1
amappl3     96      492    0      459     2     0     2     2     0     8    1
amappl2     88      640    0      584     3     0     3     3     0     8    1
amappl1     80    10461    0     9909    27     7    20    26     0     8    8
amappl      88     1601    0     1517     4     0     4     4     0    92    2
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        2    0        0     1     0     1     1     0     8    0
uaddrrnd    24      322    0      307     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      322    0      307     1     0     1     1     0     8    0
vmmpekpl   168     9164    0     9144     2     0     2     2     0     8    0
vmmpepl    168    37014    0    35631   131     4   127   127     0   357   66
vmsppl     440      321    0      307     3     0     3     3     0     8    1
rwobjpl     56    14284    0    11964    48     2    46    47     0     8    8
pdppl      4096     651    0      614    83    26    57    61     0     8   20
pvpl        32   290918    0   282777   379    43   336   361     0   265  265
pmappl     248      321    0      307     3     1     2     2     0     8    1
extentpl    40       56    0       38     1     0     1     1     0     8    0
phpool     112      612    0       29    17     0    17    17     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x1a:        addq    $0x8,%rsp
ddb{0}> trace
x86_ipi_db(ffffffff82bc1ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393
x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23
end of kernel
end trace frame: 0x7f7ffffdf990, count: -3
ddb{0}> machine ddbcpu 1
Stopped at      sys_msgrcv+0x2df:       movq    0x10(%r13),%rdi
ddb{1}> trace
sys_msgrcv(ffff800021228dc0,ffff800021292f48,ffff800021292f90) at sys_msgrcv+0x2df msg_copyout sys/kern/sysv_msg.c:639 [inline]
sys_msgrcv(ffff800021228dc0,ffff800021292f48,ffff800021292f90) at sys_msgrcv+0x2df sys/kern/sysv_msg.c:349
syscall(ffff800021293010) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline]
syscall(ffff800021293010) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xfde9d7e32a0, count: -3
ddb{1}> 

Crashes (31):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/23 06:38 openbsd 1e5b016c5082 f94b4a29 .config console log report syz [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/03/08 21:44 openbsd 1e5b016c5082 4fc6d98d .config console log report syz [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/02/27 18:50 openbsd 1e5b016c5082 95aee97a .config console log report syz [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2022/12/21 22:22 openbsd bcc2e3d7508b 4067838e .config console log report syz [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2022/12/19 22:38 openbsd 4068fef5c65e c52b2efb .config console log report syz [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/08/24 16:01 openbsd 5db6d8bd4d7e 6f19564f .config console log report syz C [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/06/13 12:31 openbsd fafd6c403a36 749afb64 .config console log report syz C [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2024/05/05 09:40 openbsd 5ec8126aae72 610f2a54 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2024/01/26 20:15 openbsd 4bdff4bed0e3 cc4a4020 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/09/18 22:45 openbsd e88da610350a 0b6a67ac .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/09/06 00:53 openbsd b3774972aa78 0b6286dc .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/07/30 22:07 openbsd d0c03c4f4dd4 2a0d0f29 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/06/29 10:58 openbsd 2b5ea97fcaa5 134ddc02 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/06/13 08:57 openbsd fafd6c403a36 749afb64 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/05/15 23:15 openbsd 510f4386e153 71b00cfb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/04/24 19:05 openbsd 1e5b016c5082 c778c7f4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/23 22:33 openbsd 1e5b016c5082 2b32bd34 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/23 20:10 openbsd 1e5b016c5082 2b32bd34 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/22 23:45 openbsd 1e5b016c5082 2b32bd34 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/15 09:48 openbsd 1e5b016c5082 3cfcaa1b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
2023/04/12 22:17 openbsd 1e5b016c5082 82d5e53e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/07 14:00 openbsd 1e5b016c5082 f7ba566d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/07 02:44 openbsd 1e5b016c5082 00ce4c67 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/04/06 12:21 openbsd 1e5b016c5082 08707520 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/03/23 06:09 openbsd 1e5b016c5082 f94b4a29 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/03/08 15:10 openbsd 1e5b016c5082 4fc6d98d .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/02/27 15:19 openbsd 1e5b016c5082 95aee97a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2023/02/15 18:37 openbsd 1e5b016c5082 6be0f1f5 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2022/12/21 21:54 openbsd bcc2e3d7508b 4067838e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2022/12/19 22:00 openbsd 4068fef5c65e c52b2efb .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid protection_fault: sys_msgrcv
2022/10/13 01:20 openbsd ddd5e87dd012 89b5a509 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore protection_fault: sys_msgrcv
* Struck through repros no longer work on HEAD.