uvm_fault: savectx (3)

Status: closed as dup on 2026/08/16 00:05
Reported-by: syzbot+a67c3d29b86efeb5eed6@syzkaller.appspotmail.com
First crash: 586d, last: 5d19h
▶ ▼ Duplicate of
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported
uvm_fault: dovutimens -1 323266 44d 188d
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: savectx -1 1 1404d 1404d 0/4 auto-obsoleted due to no activity on 2023/02/23 10:19
openbsd uvm_fault: savectx (2) -1 33 708d 795d 0/4 auto-obsoleted due to no activity on 2024/12/10 09:14

Sample crash report:
*cpu0: uvm_fault(0xfffff7806cff07c8, 0x1000001d8, 0, 1) -> e
ddb{1}> show kasan
No such command
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7eb88a557b80, count: -1
ddb{1}> show registers
rdi                                0
rsi                                0
rbp               0xffff800038f9c2d0
rbx                                0
rdx                                0
rcx               0xffff80002a22bca0
rax                             0x3c
r8                0xffff800038f9c200
r9                                 0
r10               0x3ae47223cbcff1bd
r11               0xe2c625b605d81391
r12                                0
r13                                0
r14               0xffff80002a22bca0
r15                                0
rip               0xffffffff8314c3ee    savectx+0xae
cs                               0x8
rflags                          0x46
rsp               0xffff800038f9c250
ss                              0x10
savectx+0xae:   movl    $0,%gs:0x688
ddb{1}> show proc
PROC (syz-executor) tid=171735 pid=21796 tcnt=2 stat=onproc
    flags process=10<SUGID> proc=0
    runpri=53, usrpri=53, slppri=17, nice=20
    wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0
    forw=0xffffffffffffffff, list=0xffff80002a22a018,0xffff80002a22a7f0
    process=0xffff800045fe49d0 user=0xffff800038f97000, vmspace=0xfffff7806d1ae7c0
    estcpu=3, cpticks=3, pctcpu=0.2, user=1, sys=2, intr=0
ddb{1}> ps
   PID     TID   PPID   UID  S      PRLAGS     PFLAGS WAIT      COMMAND
 54543  277531  94411     0  7         0x2          0           syz-executor
 56689    5458  29881 32767  2        0x10          0           syz-executor
 56689  273338  29881 32767  3        0x10  0x4000080 kqsel     syz-executor
 57376  488614  33638 32767  2        0x10          0           syz-executor
 57376  453346  33638 32767  2        0x10  0x4000000           syz-executor
*21796  171735  43476 32767  7        0x10          0           syz-executor
 21796   65325  43476 32767  3        0x10  0x4000080 fsleep    syz-executor
 84256  303068  40055 32767  2        0x10          0           syz-executor
 84256  465881  40055 32767  3        0x10  0x4000080 fsleep    syz-executor
 84256  391146  40055 32767  3        0x10  0x4000080 fsleep    syz-executor
 35126  415950  23530 32767  2        0x10          0           syz-executor
 35126  190012  23530 32767  3        0x10  0x4000080 fsleep    syz-executor
 29881  419447  11997 32767  3        0x10       0x80 nanoslp   syz-executor
 23530   91155  94019 32767  3        0x10       0x80 nanoslp   syz-executor
 40055  279467  72523 32767  3        0x10       0x80 nanoslp   syz-executor
 33638  331497  22800 32767  3        0x10       0x80 nanoslp   syz-executor
 43476   14808  49525 32767  3        0x10       0x80 nanoslp   syz-executor
 22800  207239  94411     0  3         0x2       0x80 wait      syz-executor
 11997  429349  94411     0  3         0x2       0x80 wait      syz-executor
 83825  479475  94411     0  3         0x2       0x80 wait      syz-executor
 24661  339716  94411     0  3         0x2       0x80 wait      syz-executor
 49525  402417  94411     0  3         0x2       0x80 wait      syz-executor
 94019   11100  94411     0  3         0x2       0x80 wait      syz-executor
 72523  347924  94411     0  3         0x2       0x80 wait      syz-executor
 94411  114546  69175     0  3         0x2       0x80 kqread    syz-executor
 69175   19758  60221     0  3    0x100002       0x88 sigsusp   ksh
 60221  194632  44660     0  3        0x10       0x88 kqread    sshd-session
 44660  200015  35924     0  3        0x12       0x80 kqread    sshd-session
 55887  198287      1     0  3    0x100003       0x80 ttyin     getty
 35924  261004      1     0  3           0       0x88 kqread    sshd
 78618  167402  37147    73  3   0x1100010       0x80 kqread    syslogd
 37147  182459      1     0  3    0x100002       0x80 sbwait    syslogd
 81786  273480      1     0  3    0x100000       0x80 kqread    resolvd
 41191  153157  62947    77  3    0x100012       0x80 kqread    dhcpleased
 27967  512789  62947    77  3    0x100012       0x80 kqread    dhcpleased
 62947  507020      1     0  3           0       0x80 kqread    dhcpleased
 36619   59188      0     0  3     0x14000      0x200 bored     smr
 17144  229478      0     0  2     0x14000      0x200           zerothread
 32333  392496      0     0  3     0x14000      0x200 aiodoned  aiodoned
 93319  235829      0     0  3     0x14000      0x200 syncer    update
 97863  436410      0     0  3     0x14000      0x200 cleaner   cleaner
 27688  421780      0     0  3     0x14000      0x200 reaper    reaper
 43343  181153      0     0  3     0x14000      0x200 pgdaemon  pagedaemon
 50138    8874      0     0  3     0x14000      0x200 bored     viomb
 84884   36418      0     0  3     0x14000 0x40000200 acpi0     acpi0
 19914  340819      0     0  3     0x14000 0x40000200           idle1
 81141   36042      0     0  3     0x14000      0x200 bored     softnet1
 26457   95252      0     0  3     0x14000      0x200 bored     softnet0
 73031  390077      0     0  3     0x14000      0x200 smrbar    systqmp
  9273  237637      0     0  3     0x14000      0x200 bored     systq
  9977  497543      0     0  3     0x14000      0x200 tmoslp    softclockmp
 33911  180098      0     0  3     0x14000 0x40000200 tmoslp    softclock
 40573  157674      0     0  3     0x14000 0x40000200           idle0
     1   63338      0     0  3         0x2       0x80 wait      init
     0       0     -1     0  3     0x10000      0x200 scheduler swapper
ddb{1}> show all locks
CPU 1:
exclusive mutex &pmap->pm_mtx r = 0 (0xfffff7806cfef710)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2  pmap_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2  pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
#2  pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173
#3  uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline]
#3  uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202
#4  sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#6  Xsyscall+0x128
Process 54543 (syz-executor) thread 0xffff800045fe2a88 (277531)
shared rwlock amaplk r = 0 (0xfffff7806c965d98)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2  uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834
#3  uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#4  upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194
#5  usertrap+0x430 sys/arch/amd64/amd64/trap.c:648
#6  recall_trap+0x8
shared rwlock vmmaplk r = 0 (0xfffff7806cff08c8)
#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_read+0x3e8 sys/kern/kern_rwlock.c:413
#2  uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880
#3  uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693
#4  uvm_fault+0x106 sys/uvm/uvm_fault.c:627
#5  upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194
#6  usertrap+0x430 sys/arch/amd64/amd64/trap.c:648
#7  recall_trap+0x8
Process 21796 (syz-executor) thread 0xffff80002a22bca0 (171735)
exclusive rwlock uobjlk r = 0 (0xfffff7806d4ff468)
#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  uvm_map_protect+0xb36 sys/uvm/uvm_map.c:3202
#3  sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#4  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#4  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#5  Xsyscall+0x128
exclusive rwlock vmmaplk r = 0 (0xfffff7806d1ae8c0)
#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  vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5170
#3  uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075
#4  sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#6  Xsyscall+0x128
exclusive mutex &pmap->pm_mtx r = 0 (0xfffff7806cfef710)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  mtx_enter+0x4b4 sys/kern/kern_lock.c:487
#2  pmap_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline]
#2  pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline]
#2  pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173
#3  uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline]
#3  uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202
#4  sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590
#5  syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
#5  syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791
#6  Xsyscall+0x128
Process 73031 (systqmp) thread 0xffff800045ffe000 (390077)
shared rwlock systqmp r = 0 (0xffffffff838f7b48)
#0  witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline]
#0  witness_lock+0x5f1 sys/kern/subr_witness.c:1160
#1  taskq_thread+0x12a sys/kern/kern_task.c:442
#2  proc_trampoline+0x10
ddb{1}> show malloc
           Type InUse  MemUse  HighUse   Limit  Requests Type Lim
         devbuf 11044  12015K   12034K 166960K     12138        0
            pcb    17     12K      12K 166960K        17        0
         rtable   215      6K       7K 166960K       347        0
             pf    29     16K      16K 166960K        31        0
         ifaddr    38      6K       7K 166960K        44        0
        ifgroup    46      2K       2K 166960K        50        0
         sysctl     1      1K       9K 166960K         5        0
       counters    68     36K      37K 166960K        70        0
       ioctlops     0      0K       4K 166960K        30        0
            iov     0      0K       8K 166960K         1        0
          mount     1      1K       1K 166960K         1        0
            log     0      0K       0K 166960K         4        0
         vnodes  1287     81K      81K 166960K      1353        0
      UFS quota     1     32K      32K 166960K         1        0
      UFS mount     5     36K      36K 166960K         5        0
            shm     2      1K       1K 166960K         2        0
         VM map     2      1K       1K 166960K         2        0
            sem     4      0K       0K 166960K         5        0
        dirhash    12      2K       2K 166960K        12        0
           ACPI  1692    195K     286K 166960K     12470        0
      file desc    22     78K     125K 166960K       153        0
           proc    58     99K     163K 166960K       496        0
        subproc    63      3K       4K 166960K        72        0
    NFS srvsock     1      0K       0K 166960K         1        0
     NFS daemon     1     16K      16K 166960K         1        0
    ip_moptions     0      0K       0K 166960K         4        0
       in_multi    88      5K       6K 166960K        99        0
    ether_multi     1      0K       0K 166960K         1        0
            mrt     0      0K       0K 166960K         2        0
    ISOFS mount     1     32K      32K 166960K         1        0
  MSDOSFS mount     1     16K      16K 166960K         1        0
           ttys    43    201K     201K 166960K        43        0
           exec     0      0K       1K 166960K       357        0
   fusefs mount     1     32K      32K 166960K         1        0
            tdb     3      0K       0K 166960K         3        0
        VM swap     8     62K      64K 166960K        10        0
       UVM amap   226    175K     184K 166960K      2981        0
       UVM aobj     3      2K       2K 166960K         3        0
     pinsyscall    43     86K     113K 166960K      1225        0
        memdesc     1      4K       4K 166960K         1        0
    crypto data     1      1K       1K 166960K         1        0
            NDP    24      1K       2K 166960K        27        0
           temp    30   9113K    9120K 166960K      3342        0
         kqueue    14     22K      22K 166960K        29        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       34    0       31     1     0     1     1     0     8    0
rtentry    176      111    0       12     5     0     5     5     0     8    0
unpcb      144       50    0       35     1     0     1     1     0     8    0
syncache   336        4    0        4     1     0     1     1     0     8    1
tcpcb      736       47    0       43     4     0     4     4     0     8    3
arp        136       18    0        2     1     0     1     1     0     8    0
inpcb      328      147    0      136     7     0     7     7     0     8    5
nd6        152       24    0        3     1     0     1     1     0     8    0
kcovpl      48        8    0        1     1     0     1     1     0     8    0
art_heap8  4096       1    0        0     1     0     1     1     0     8    0
art_heap4  256      453    0        0    29     0    29    29     0     8    0
art_table   40      454    0        0     5     0     5     5     0     8    0
art_node    32      111    0       11     1     0     1     1     0     8    0
semupl     112        1    0        1     1     0     1     1     0     8    1
semapl      72        2    0        0     1     0     1     1     0     8    0
dirhash    1024      17    0        0     3     0     3     3     0     8    0
dino2pl    256     1567    0      101    92     0    92    92     0     8    0
ffsino     296     1567    0      101   113     0   113   113     0     8    0
nchpl      144     1770    0       72    63     0    63    63     0     8    0
vnodes     216     1648    0        0    92     0    92    92     0     8    0
namei      1024    5853    0     5853     4     1     3     3     0     8    3
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     6150    0     6150     4     2     2     3     1     8    2
plimitpl   152       38    0       14     1     0     1     1     0     8    0
sigapl     424      442    0      392     7     0     7     7     0     8    1
knotepl    120      293    0        0     9     0     9     9     0     8    0
kqueuepl   224       27    0       16     1     0     1     1     0     8    0
pipepl     344      124    0       97     3     0     3     3     0     8    0
fdescpl    528      426    0      392     4     0     4     4     0     8    0
filepl     160     1564    0     1357    12     0    12    12     0     8    2
lockfpl    104       13    0        9     1     0     1     1     0     8    0
lockfspl    48        7    0        3     1     0     1     1     0     8    0
sessionpl  144       23    0        8     1     0     1     1     0     8    0
pgrppl      48       32    0        9     1     0     1     1     0     8    0
ucredpl    104      122    0      104     1     0     1     1     0     8    0
zombiepl   144      394    0      392     1     0     1     1     0     8    0
processpl  1240     442    0      392     5     0     5     5     0     8    0
procpl     664      470    0      414     6     0     6     6     0     8    0
sockpl     752      231    0      201    10     0    10    10     0     8    6
mcl8k      8192       2    0        0     1     0     1     1     0     8    0
mcl4k      4096     111    0        0    14     0    14    14     0     8    0
mcl2k      2048      19    0        0     3     0     3     3     0     8    0
mextrefs    64       15    0        0     1     0     1     1     0     8    0
mtagpl      96        2    0        0     1     0     1     1     0     8    0
mbufpl     256      173    0        0    11     0    11    11     0     8    0
bufpl      272     2237    0      102   143     0   143   143     0     8    0
anonpl      32     3477    0        0    28     0    28    28     0   247    0
amapchunkpl 152    8044    0     7550    23     0    23    23     0   158    1
amappl16   200     1496    0     1481     5     0     5     5     0     8    4
amappl15   192        5    0        5     2     1     1     1     0     8    1
amappl14   184      405    0      403     1     0     1     1     0     8    0
amappl13   176      113    0      103     1     0     1     1     0     8    0
amappl12   168      657    0      624     2     0     2     2     0     8    0
amappl11   160        2    0        2     1     0     1     1     0     8    1
amappl10   152       71    0       61     1     0     1     1     0     8    0
amappl9    144      267    0      267     1     0     1     1     0     8    1
amappl8    136       90    0       89     1     0     1     1     0     8    0
amappl7    128      140    0      129     1     0     1     1     0     8    0
amappl6    120      152    0      151     1     0     1     1     0     8    0
amappl5    112       93    0       86     1     0     1     1     0     8    0
amappl4    104      275    0      261     1     0     1     1     0     8    0
amappl3     96     1439    0     1346     4     1     3     3     0     8    0
amappl2     88      534    0      460     2     0     2     2     0     8    0
amappl1     80    10033    0     9475    13     0    13    13     0     8    0
amappl      88     2315    0     2153     5     0     5     5     0    92    0
uvmvnodes   80       96    0        0     2     0     2     2     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        2    0        0     1     0     1     1     0     8    0
uaddrrnd    24      426    0      392     1     0     1     1     0     8    0
uaddrbest   32        2    0        0     1     0     1     1     0     8    0
uaddr       24      426    0      392     1     0     1     1     0     8    0
vmmpekpl   168     5396    0     5354     2     0     2     2     0     8    0
vmmpepl    168    36427    0    34538    93     0    93    93     0   357    4
vmsppl     488      425    0      392     7     1     6     6     0     8    1
rwobjpl     80    13721    0    12816    22     1    21    21     0     8    0
pdppl      4096     859    0      784   107    10    97    97     0     8   22
pvpl        32     9680    0        0    79     0    79    79     0   265    0
pmappl     256      425    0      392     4     1     3     3     0     8    0
extentpl    40       45    0       27     1     0     1     1     0     8    0
phpool     112      420    0       14    12     0    12    12     0     8    0
ddb{1}> machine ddbcpu 0
Stopped at      x86_ipi_db+0x27:        addq    $0x8,%rsp
x86_ipi_db(ffffffff83934ff0) 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
x86_bus_space_io_write_1(3f8,0,20) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:797
comcnputc(800,20) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline]
comcnputc(800,20) at comcnputc+0x1ab sys/dev/ic/com.c:1268
cnputc(20) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(70) at db_putchar+0x182 db_force_whitespace sys/ddb/db_output.c:-1 [inline]
db_putchar(70) at db_putchar+0x182 sys/ddb/db_output.c:153
kprintf() at kprintf+0x2a75 sys/kern/subr_prf.c:-1
db_printf(ffffffff834b9a26) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,0,ffff80003c3eef40) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,0,ffff80003c3eef40) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff80003c3eef40) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:523
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
amap_lookups(fffff7806c94d210,11000,ffff80003c3ef130,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:120 [inline]
amap_lookups(fffff7806c94d210,11000,ffff80003c3ef130,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1170
uvm_fault_check(ffff80003c3ef230,ffff80003c3ef268,ffff80003c3ef2a0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840
end trace frame: 0xffff80003c3ef300, count: 0
ddb{0}> trace
x86_ipi_db(ffffffff83934ff0) 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
x86_bus_space_io_write_1(3f8,0,20) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:797
comcnputc(800,20) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline]
comcnputc(800,20) at comcnputc+0x1ab sys/dev/ic/com.c:1268
cnputc(20) at cnputc+0x67 sys/dev/cons.c:218
db_putchar(70) at db_putchar+0x182 db_force_whitespace sys/ddb/db_output.c:-1 [inline]
db_putchar(70) at db_putchar+0x182 sys/ddb/db_output.c:153
kprintf() at kprintf+0x2a75 sys/kern/subr_prf.c:-1
db_printf(ffffffff834b9a26) at db_printf+0x9b sys/kern/subr_prf.c:-1
db_ktrap(6,0,ffff80003c3eef40) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline]
db_ktrap(6,0,ffff80003c3eef40) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128
kerntrap(ffff80003c3eef40) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:523
alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b
amap_lookups(fffff7806c94d210,11000,ffff80003c3ef130,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:120 [inline]
amap_lookups(fffff7806c94d210,11000,ffff80003c3ef130,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1170
uvm_fault_check(ffff80003c3ef230,ffff80003c3ef268,ffff80003c3ef2a0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840
uvm_fault(fffff7806cff07c8,9deb211d000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627
upageflttrap(ffff80003c3ef3d0,9deb211d514) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:194
usertrap(ffff80003c3ef3d0) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:648
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x74dc1ea2ec90, count: -18
ddb{0}> machine ddbcpu 1
Stopped at      savectx+0xae:   movl    $0,%gs:0x688
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7eb88a557b80, count: 14
ddb{1}> trace
savectx() at savectx+0xae
end of kernel
end trace frame: 0x7eb88a557b80, count: -1

Crashes (6208):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/23 16:10 openbsd 6c60011d0c8d abce1216 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: savectx
2026/09/19 19:49 openbsd f239e4190c56 853b104b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/20 09:19 openbsd 1a498b6f2b58 1e72964b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: savectx
2026/08/16 16:27 openbsd ae3832a13713 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-setuid uvm_fault: savectx
2026/08/15 22:29 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/15 18:07 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/15 16:20 openbsd b903a0834f41 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/15 09:00 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/15 03:52 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/15 01:19 openbsd a536f3ad0739 746171ee .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/14 20:13 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/14 15:29 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/14 14:03 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/14 12:29 openbsd 7d89a3e82316 6f9b3e89 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/14 06:52 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/14 04:02 openbsd 52741ec3fdca b13552fe .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/13 20:16 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/13 19:16 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/13 15:59 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/13 13:11 openbsd b8ee6bbd8ccb 4d118901 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/13 09:08 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/13 04:49 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/12 23:48 openbsd a63ea9f8f0de 359b2492 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/12 20:39 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/12 19:22 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/12 13:47 openbsd 2610791609b5 ee03bfea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/12 06:23 openbsd a47f863e5cb3 f8d35649 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 20:56 openbsd 99858244924d 557a89d3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 19:24 openbsd 99858244924d 557a89d3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 18:23 openbsd 99858244924d 557a89d3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 15:38 openbsd 99858244924d 557a89d3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 10:12 openbsd 99858244924d 557a89d3 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 08:58 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 07:54 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 05:37 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/11 03:31 openbsd b56428e2942e 508909ea .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/08/10 20:12 openbsd 422ca638c1d6 558388e4 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-multicore uvm_fault: savectx
2026/07/13 16:10 openbsd 663dfdac4969 a870962e .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-main uvm_fault: savectx
2025/02/20 07:11 openbsd 483a78e15aaa 50668798 .config console log report ci-openbsd-multicore uvm_fault: savectx
2026/09/15 15:04 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 f41e228a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/15 13:34 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 f41e228a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/15 11:32 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 f41e228a .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/14 18:01 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 924033e8 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/14 14:38 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 924033e8 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/14 11:17 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 924033e8 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/14 06:44 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 70a60e12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/14 03:33 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 70a60e12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/14 02:31 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan ba3d21e4ee62 70a60e12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/13 22:24 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 2fac54c86f35 70a60e12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/13 13:33 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 2fac54c86f35 70a60e12 .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
2026/09/04 17:07 https://github.com/blackgnezdo/openbsd-src.git syzbot-kasan 06706d23b01e 44dda43b .config console log report [disk image] [bsd.gdb] [kernel image] ci-openbsd-kasan uvm_fault: savectx
* Struck through repros no longer work on HEAD.