uvm_fault(0xffffffff82bcbd30, 0xffff80000bc9f004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *494558 63631 0 0 0x4000000 0 syz-executor.3 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807daa7878,ffff800027f5e3d8,ffff800027f5e408) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800027f5e3a8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800027f5e3a8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800027f5e3a8,70f,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002e872610,ffffff9c,20000040,70e,10,ffff800027f5e580) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800027f5e600) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4b25b4af000, count: 7 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff82bcbd30, 0xffff80000bc9f004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807daa7878,ffff800027f5e3d8,ffff800027f5e408) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800027f5e3a8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800027f5e3a8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800027f5e3a8,70f,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002e872610,ffffff9c,20000040,70e,10,ffff800027f5e580) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800027f5e600) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4b25b4af000, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff800027f5e010 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd8056a63a50 r8 0xffffffffffffffff r9 0xfffffd807f7d7680 r10 0x39cae5a7b7744b57 r11 0xa1c60a53a943e0a r12 0 r13 0 r14 0 r15 0xffff80000bc9f000 rip 0xffffffff81260e4e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800027f5df10 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb> show proc PROC (syz-executor.3) pid=494558 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002e873bd0,0xffff80002e872b90 process=0xffff8000217203f0 user=0xffff800027f59000, vmspace=0xfffffd8069b6aad0 estcpu=31, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 94799 299007 65519 0 2 0 syz-executor.5 94799 289887 65519 0 3 0x4000080 netcon2 syz-executor.5 3198 366892 58226 0 2 0 syz-executor.1 3198 240325 58226 0 3 0x4000080 kqpoll syz-executor.1 3198 171081 58226 0 3 0x4000080 fsleep syz-executor.1 92775 142441 84600 0 2 0 syz-executor.0 92775 215867 84600 0 3 0x4000080 fsleep syz-executor.0 63631 144978 67697 0 2 0 syz-executor.3 *63631 494558 67697 0 7 0x4000000 syz-executor.3 70290 210049 32001 0 2 0 syz-executor.2 70290 136004 32001 0 3 0x4000080 fsleep syz-executor.2 25964 353822 44200 0 2 0 syz-executor.7 25964 53133 44200 0 3 0x4000080 fsleep syz-executor.7 55259 244421 97608 0 2 0 syz-executor.6 55259 442302 97608 0 3 0x4000080 fsleep syz-executor.6 97608 180389 62609 0 3 0x82 nanoslp syz-executor.6 84600 44688 62609 0 3 0x82 nanoslp syz-executor.0 65519 420378 62609 0 3 0x82 nanoslp syz-executor.5 67697 106111 62609 0 3 0x82 nanoslp syz-executor.3 44200 137833 62609 0 3 0x82 nanoslp syz-executor.7 32001 239308 62609 0 3 0x82 nanoslp syz-executor.2 53247 218897 62609 0 3 0x82 nanoslp syz-executor.4 64174 234516 1 0 3 0x100083 ttyin getty 58226 450576 62609 0 3 0x82 nanoslp syz-executor.1 38896 119725 0 0 3 0x14200 bored sosplice 89932 260371 0 0 3 0x14280 nfsidl nfsio 19248 26935 0 0 3 0x14280 nfsidl nfsio 55073 22574 0 0 3 0x14280 nfsidl nfsio 68975 2067 0 0 3 0x14280 nfsidl nfsio 31439 221822 0 0 3 0x14280 nfsidl nfsio 44979 218576 0 0 3 0x14280 nfsidl nfsio 80106 11565 0 0 3 0x14280 nfsidl nfsio 37749 511143 0 0 3 0x14280 nfsidl nfsio 33719 429537 0 0 3 0x14280 nfsidl nfsio 65362 357836 0 0 3 0x14280 nfsidl nfsio 49881 434678 0 0 3 0x14280 nfsidl nfsio 72508 329810 0 0 3 0x14280 nfsidl nfsio 99499 448085 0 0 3 0x14280 nfsidl nfsio 28972 350205 0 0 3 0x14280 nfsidl nfsio 30012 91175 0 0 3 0x14280 nfsidl nfsio 29959 452791 0 0 3 0x14280 nfsidl nfsio 8001 267117 0 0 3 0x14280 nfsidl nfsio 86456 448047 0 0 3 0x14280 nfsidl nfsio 58406 407816 0 0 3 0x14280 nfsidl nfsio 23623 164977 0 0 3 0x14280 nfsidl nfsio 62609 515782 65455 0 3 0x82 thrsleep syz-fuzzer 62609 400392 65455 0 2 0x4000002 syz-fuzzer 62609 75422 65455 0 3 0x4000082 wait syz-fuzzer 62609 308357 65455 0 3 0x4000082 thrsleep syz-fuzzer 62609 500328 65455 0 3 0x4000082 wait syz-fuzzer 62609 498362 65455 0 3 0x4000082 wait syz-fuzzer 62609 452285 65455 0 3 0x4000082 thrsleep syz-fuzzer 62609 369924 65455 0 3 0x4000082 wait syz-fuzzer 62609 214771 65455 0 3 0x4000082 wait syz-fuzzer 62609 137885 65455 0 3 0x4000082 wait syz-fuzzer 62609 357316 65455 0 3 0x4000082 thrsleep syz-fuzzer 62609 118336 65455 0 3 0x4000082 wait syz-fuzzer 62609 523679 65455 0 3 0x4000082 kqread syz-fuzzer 62609 516859 65455 0 3 0x4000082 wait syz-fuzzer 65455 438991 51456 0 3 0x10008a sigsusp ksh 51456 376173 66846 0 3 0x9a kqread sshd 66846 245261 1 0 3 0x88 kqread sshd 23080 291437 77266 73 3 0x1100090 kqread syslogd 77266 490148 1 0 3 0x100082 netio syslogd 84458 477510 1 0 3 0x100080 kqread resolvd 4789 457511 0 0 3 0x14200 bored smr 77116 223803 0 0 2 0x14200 zerothread 27205 31000 0 0 3 0x14200 aiodoned aiodoned 85486 516654 0 0 3 0x14200 syncer update 6621 175507 0 0 3 0x14200 cleaner cleaner 81718 65011 0 0 3 0x14200 reaper reaper 11700 350154 0 0 3 0x14200 pgdaemon pagedaemon 97709 441862 0 0 3 0x14200 bored viomb 32094 182963 0 0 3 0x40014200 acpi0 acpi0 43418 456120 0 0 3 0x14200 bored softnet 79375 71547 0 0 3 0x14200 bored softnet 29680 464368 0 0 3 0x14200 bored softnet 22598 489655 0 0 3 0x14200 bored softnet 13865 26597 0 0 3 0x14200 bored systqmp 21976 370546 0 0 3 0x14200 bored systq 95194 164685 0 0 3 0x40014200 bored softclock 3844 387148 0 0 3 0x40014200 idle0 1 357758 0 0 3 0x82 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 10220 6433K 6767K 78643K 13403 0 pcb 13 20K 25K 78643K 3939 0 rtable 202 16K 16K 78643K 4010 0 ifaddr 89 25K 26K 78643K 1033 0 sysctl 2 0K 0K 78643K 2 0 counters 30 17K 17K 78643K 387 0 ioctlops 0 0K 4K 78643K 6182 0 iov 0 0K 44K 78643K 1702 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1491 93K 94K 78643K 12966 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 117 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 1413 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 17 61K 73K 78643K 14218 0 sigio 0 0K 0K 78643K 497 0 proc 61 43K 83K 78643K 2750 0 subproc 104 6K 6K 78643K 1007 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 652 0 in_multi 78 5K 7K 78643K 1054 0 ether_multi 1 0K 0K 78643K 51 0 mrt 2 0K 0K 78643K 43 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 223 996K 996K 78643K 223 0 exec 0 0K 1K 78643K 2728 0 pfkey data 0 0K 0K 78643K 7 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 299 86K 102K 78643K 91080 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 1580 0 NDP 14 0K 1K 78643K 386 0 temp 135 5770K 71434K 78643K 1048088 0 kqueue 6 10K 22K 78643K 850 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1641 0 1640 12 11 1 4 0 8 0 rtentry 112 1276 0 1192 6 3 3 4 0 8 0 unpcb 144 16251 0 16242 165 159 6 14 0 8 5 syncache 296 22 0 22 8 8 0 1 0 8 0 tcpqe 32 101 0 101 7 7 0 1 0 8 0 tcpcb 776 18827 0 18819 300 292 8 18 0 8 7 arp 88 166 0 152 1 0 1 1 0 8 0 ipq 40 5 0 5 2 2 0 1 0 8 0 ipqe 40 20 0 20 2 2 0 1 0 8 0 inpcb 336 31710 0 31699 300 291 9 18 0 8 8 nd6 48 238 0 220 1 0 1 1 0 8 0 pkpcb 40 23 0 23 6 6 0 1 0 8 0 kcovpl 48 77 0 69 1 0 1 1 0 8 0 mppekey 1024 83 0 83 7 7 0 1 0 8 0 ppxss 1160 204 0 202 22 21 1 1 0 8 0 pppxif 1360 103 0 103 12 12 0 1 0 8 0 pfstscr 40 1743 0 1733 1 0 1 1 0 8 0 pfosfp 40 8 0 7 1 0 1 1 0 8 0 pfosfpen 112 8 0 7 1 0 1 1 0 8 0 pfanchor 1280 839 87 327 49 6 43 43 0 8 0 pfqueue 264 7 0 7 2 2 0 1 0 8 0 pfstitem 24 1620 0 1604 1 0 1 1 0 8 0 pfstkey 128 3348 0 1740 52 0 52 52 0 8 0 pfstate 352 1683 0 1674 1 0 1 1 0 8 0 rttmr 136 9 0 9 2 2 0 1 0 8 0 art_heap8 4096 7 0 6 7 6 1 3 0 8 0 art_heap4 256 4190 0 3803 60 35 25 30 0 8 0 art_table 32 4197 0 3809 5 1 4 4 0 8 0 art_node 16 1262 0 1191 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 1 1 0 1 1 0 8 0 semapl 112 1408 0 1398 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 21968 0 20021 122 0 122 122 0 8 0 ffsino 240 21968 0 20021 115 0 115 115 0 8 0 nchpl 144 42253 0 40624 63 1 62 63 0 8 0 rtmask 32 2 0 1 1 0 1 1 0 8 0 uvmvnodes 80 8733 0 0 179 0 179 179 0 8 0 vnodes 216 8733 0 0 486 0 486 486 0 8 0 namei 1024 143889 0 143888 12 11 1 3 0 8 0 vmpool 664 10 0 10 3 3 0 1 0 8 0 kstatmem 264 438 0 410 4 2 2 3 0 8 0 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 146559 0 146559 41 40 1 8 0 8 1 plimitpl 152 1329 0 1315 1 0 1 1 0 8 0 sigapl 424 14389 0 14326 11 3 8 8 0 8 0 futexpl 64 195821 0 195816 8 7 1 1 0 8 0 knotepl 120 167669 0 167605 89 85 4 13 0 8 1 kqueuepl 184 1991 0 1985 26 25 1 4 0 8 0 pipepl 288 4313 0 4219 87 80 7 7 0 8 0 fdescpl 432 14350 0 14325 4 1 3 4 0 8 0 filepl 120 118016 0 117651 187 175 12 21 0 8 0 lockfpl 104 3760 0 3759 8 7 1 2 0 8 0 lockfspl 48 1281 0 1280 1 0 1 1 0 8 0 sessionpl 144 96 0 81 1 0 1 1 0 8 0 pgrppl 48 231 0 216 1 0 1 1 0 8 0 ucredpl 104 9165 0 9156 1 0 1 1 0 8 0 zombiepl 144 14327 0 14326 9 8 1 1 0 8 0 processpl 1008 14389 0 14326 11 2 9 9 0 8 0 procpl 696 34861 0 34777 21 12 9 10 0 8 0 sosppl 168 76 0 76 11 11 0 1 0 8 0 sockpl 456 49676 0 49658 1093 1082 11 49 0 8 8 mcl64k 65536 1496 0 1496 24 23 1 1 0 8 1 mcl16k 16384 363 0 363 31 30 1 1 0 8 1 mcl12k 12288 608 0 608 32 31 1 1 0 8 1 mcl9k 9216 154 0 154 32 31 1 1 0 8 1 mcl8k 8192 1682 0 1682 20 19 1 1 0 8 1 mcl4k 4096 1882 0 1882 23 22 1 1 0 8 1 mcl2k2 2112 110 0 110 39 38 1 1 0 8 1 mcl2k 2048 110960 0 110916 68 57 11 31 0 8 4 mtagpl 96 5 0 5 2 2 0 1 0 8 0 mbufpl 256 343440 0 343346 1049 1031 18 212 0 8 7 bufpl 288 45183 0 36592 625 0 625 625 0 8 3 anonpl 24 2709093 0 2693301 276 151 125 176 0 188 2 amapchunkpl 152 286917 0 286217 166 133 33 57 0 158 4 amappl16 200 24284 0 23704 138 99 39 44 0 8 8 amappl15 192 17 0 16 1 0 1 1 0 8 0 amappl14 184 426 0 414 2 1 1 2 0 8 0 amappl13 176 11 0 10 1 0 1 1 0 8 0 amappl12 168 1223 0 1220 1 0 1 1 0 8 0 amappl11 160 43 0 39 1 0 1 1 0 8 0 amappl10 152 137 0 126 1 0 1 1 0 8 0 amappl9 144 1038 0 1038 22 21 1 1 0 8 1 amappl8 136 538 0 462 3 0 3 3 0 8 0 amappl7 128 347 0 326 2 0 2 2 0 8 0 amappl6 120 1315 0 1302 2 1 1 2 0 8 0 amappl5 112 606 0 603 1 0 1 1 0 8 0 amappl4 104 1489 0 1459 2 1 1 2 0 8 0 amappl3 96 40078 0 40030 2 0 2 2 0 8 0 amappl2 88 16804 0 16750 3 1 2 3 0 8 0 amappl1 80 319028 0 318404 27 13 14 26 0 8 0 amappl 88 89344 0 89166 5 0 5 5 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 14360 0 14335 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 14360 0 14335 1 0 1 1 0 8 0 vmmpekpl 168 108681 0 108631 3 0 3 3 0 8 0 vmmpepl 168 1314664 0 1312106 354 225 129 154 0 357 5 vmsppl 344 14359 0 14335 3 0 3 3 0 8 0 rwobjpl 24 337361 0 326946 68 3 65 65 0 8 0 pdppl 4096 28726 0 28670 781 723 58 68 0 8 2 pvpl 32 5774810 0 5753593 541 328 213 360 0 265 9 pmappl 216 14359 0 14335 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3349 0 2349 34 2 32 34 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807daa7878,ffff800027f5e3d8,ffff800027f5e408) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800027f5e3a8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800027f5e3a8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800027f5e3a8,70f,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002e872610,ffffff9c,20000040,70e,10,ffff800027f5e580) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800027f5e600) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4b25b4af000, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807daa7878,ffff800027f5e3d8,ffff800027f5e408) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800027f5e3a8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800027f5e3a8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800027f5e3a8,70f,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002e872610,ffffff9c,20000040,70e,10,ffff800027f5e580) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800027f5e600) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4b25b4af000, count: -8