uvm_fault(0xffffffff82ca4f30, 0xffff8000222d2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND * 47612 36949 0 0x2 0 0K syz-executor.4 ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd805f070978,ffff800037666930,ffff800037666960) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037666900) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800037666900) at namei+0x55a sys/kern/vfs_lookup.c:250 domkdirat(ffff80002a21ea98,ffffff9c,74a6ac5ad7d0,1ff) at domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 syscall(ffff800037666ae0) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a6ac5ad840, count: 8 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82ca4f30, 0xffff8000222d2004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd805f070978,ffff800037666930,ffff800037666960) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037666900) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800037666900) at namei+0x55a sys/kern/vfs_lookup.c:250 domkdirat(ffff80002a21ea98,ffffff9c,74a6ac5ad7d0,1ff) at domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 syscall(ffff800037666ae0) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a6ac5ad840, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800037666690 rbx 0 rdx 0 rcx 0 rax 0xfffffd80638ce918 r8 0xffffffffffffffff r9 0xfffffd807f7d7340 r10 0x6632700a853186d5 r11 0xad72b6442867fe53 r12 0 r13 0xffffffff r14 0 r15 0xffff8000222d2000 rip 0xffffffff8210f990 ufs_lookup+0x4d0 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800037666590 ss 0x10 ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx ddb{0}> show proc PROC (syz-executor.4) tid=47612 pid=36949 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=77, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a2b8000,0xffff80002bcc3ad0 process=0xffff8000ffffbaa8 user=0xffff800037661000, vmspace=0xfffffd80766705d8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4923 16128 47464 0 2 0 syz-executor.7 4923 313696 47464 0 3 0x4000080 kqread syz-executor.7 4923 192585 47464 0 3 0x4000080 fsleep syz-executor.7 4923 241488 47464 0 3 0x4000080 fsleep syz-executor.7 69619 334811 2972 0 2 0 syz-executor.3 69619 332225 2972 0 2 0x4000000 syz-executor.3 69619 371518 2972 0 2 0x4000000 syz-executor.3 13722 354786 77384 0 2 0 syz-executor.1 13722 395462 77384 0 2 0x4000000 syz-executor.1 70905 283235 94456 0 2 0 syz-executor.5 33999 266856 81873 0 2 0 syz-executor.0 33999 416541 81873 0 3 0x4000080 bell syz-executor.0 33999 80481 81873 0 3 0x4000080 bell syz-executor.0 63965 522833 0 0 3 0x14280 nfsidl nfsio 34794 514739 0 0 3 0x14280 nfsidl nfsio 69699 453970 0 0 3 0x14280 nfsidl nfsio 93960 284623 0 0 3 0x14280 nfsidl nfsio 28379 435601 0 0 3 0x14280 nfsidl nfsio 10010 221226 0 0 3 0x14280 nfsidl nfsio 39883 433125 0 0 3 0x14280 nfsidl nfsio 66713 54717 0 0 3 0x14280 nfsidl nfsio 1627 234180 0 0 3 0x14280 nfsidl nfsio 10623 502268 0 0 3 0x14280 nfsidl nfsio 26960 343857 0 0 3 0x14280 nfsidl nfsio 87886 448205 0 0 3 0x14280 nfsidl nfsio 32753 399003 0 0 3 0x14280 nfsidl nfsio 76146 473910 0 0 3 0x14280 nfsidl nfsio 98173 64328 0 0 3 0x14280 nfsidl nfsio 10402 403102 0 0 3 0x14280 nfsidl nfsio 93548 306895 0 0 3 0x14280 nfsidl nfsio 50218 43018 0 0 3 0x14280 nfsidl nfsio 93189 256974 0 0 3 0x14280 nfsidl nfsio 41119 499820 0 0 3 0x14280 nfsidl nfsio 93220 50384 37192 0 3 0x82 wait syz-executor.2 36916 188183 37192 0 2 0x2 syz-executor.6 56616 231027 1 0 3 0x100083 ttyin getty *36949 47612 37192 0 7 0x2 syz-executor.4 94456 464032 37192 0 3 0x82 nanoslp syz-executor.5 47464 44246 37192 0 3 0x82 nanoslp syz-executor.7 2972 426936 37192 0 3 0x82 nanoslp syz-executor.3 81873 462608 37192 0 3 0x82 nanoslp syz-executor.0 77384 461046 37192 0 3 0x82 nanoslp syz-executor.1 78699 445155 0 0 3 0x14200 bored sosplice 28916 183949 0 0 3 0x14200 acct acct 37192 463591 18173 0 3 0x2000082 thrsleep syz-fuzzer 37192 31119 18173 0 3 0x6000082 thrsleep syz-fuzzer 37192 260049 18173 0 3 0x6000082 wait syz-fuzzer 37192 413056 18173 0 3 0x6000082 wait syz-fuzzer 37192 335478 18173 0 3 0x6000082 thrsleep syz-fuzzer 37192 508436 18173 0 3 0x6000082 thrsleep syz-fuzzer 37192 396475 18173 0 3 0x6000082 thrsleep syz-fuzzer 37192 255643 18173 0 3 0x6000082 wait syz-fuzzer 37192 88329 18173 0 3 0x6000082 kqread syz-fuzzer 37192 131659 18173 0 3 0x6000082 wait syz-fuzzer 37192 51194 18173 0 3 0x6000082 wait syz-fuzzer 37192 272587 18173 0 3 0x6000082 thrsleep syz-fuzzer 37192 123525 18173 0 3 0x6000082 wait syz-fuzzer 37192 499982 18173 0 3 0x6000082 wait syz-fuzzer 37192 133981 18173 0 3 0x6000082 wait syz-fuzzer 37192 241872 18173 0 3 0x6000082 thrsleep syz-fuzzer 18173 159416 25589 0 3 0x10008a sigsusp ksh 25589 367494 83453 0 3 0x9a kqread sshd 83453 87378 1 0 3 0x88 kqread sshd 35412 252618 54241 74 3 0x1100092 bpf pflogd 54241 401677 1 0 3 0x80 netio pflogd 48645 264967 10842 73 3 0x1100090 kqread syslogd 10842 385877 1 0 3 0x100082 netio syslogd 60954 479206 1 0 3 0x100080 kqread resolvd 34953 45488 4783 77 3 0x100092 kqread dhcpleased 88159 241451 4783 77 3 0x100092 kqread dhcpleased 4783 507401 1 0 3 0x80 kqread dhcpleased 62672 91382 0 0 3 0x14200 bored smr 59111 103795 0 0 2 0x14200 zerothread 12794 67417 0 0 3 0x14200 aiodoned aiodoned 20171 422599 0 0 3 0x14200 syncer update 65576 479364 0 0 3 0x14200 cleaner cleaner 76191 212568 0 0 3 0x14200 reaper reaper 77505 158608 0 0 3 0x14200 pgdaemon pagedaemon 58205 93341 0 0 3 0x14200 bored viomb 95533 448995 0 0 3 0x40014200 acpi0 acpi0 87726 274183 0 0 7 0x40014200 idle1 10082 486857 0 0 3 0x14200 bored softnet3 74259 374390 0 0 3 0x14200 bored softnet2 42321 13509 0 0 3 0x14200 bored softnet1 33715 138664 0 0 3 0x14200 bored softnet0 2596 31827 0 0 3 0x14200 bored systqmp 80061 272651 0 0 3 0x14200 bored systq 55148 433587 0 0 3 0x14200 tmoslp softclockmp 62597 138507 0 0 2 0x40014200 softclock 20206 269256 0 0 3 0x40014200 idle0 1 358963 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 36949 (syz-executor.4) thread 0xffff80002a21ea98 (47612) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 6509K 8866K 166960K 112579 0 pcb 15 20K 25K 166960K 2101 0 rtable 227 15K 15K 166960K 3836 0 pf 39 10K 11K 166960K 599 0 ifaddr 114 36K 38K 166960K 556 0 ifgroup 68 2K 3K 166960K 981 0 sysctl 3 0K 0K 166960K 15 0 counters 70 37K 37K 166960K 562 0 ioctlops 0 0K 4K 166960K 3177 0 iov 0 0K 32K 166960K 3417 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1682 105K 105K 166960K 34751 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 328 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 5601 0 dirhash 12 2K 2K 166960K 126 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 93K 166960K 31344 0 sigio 0 0K 0K 166960K 814 0 proc 70 91K 128K 166960K 3656 0 subproc 104 6K 7K 166960K 892 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1626 0 in_multi 89 6K 7K 166960K 1094 0 ether_multi 1 0K 0K 166960K 50 0 mrt 1 0K 0K 166960K 33 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 169 758K 758K 166960K 169 0 exec 0 0K 1K 166960K 5393 0 pfkey data 0 0K 0K 166960K 8 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 671 864K 869K 166960K 295484 0 UVM aobj 131 4K 4K 166960K 131 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 1785 0 NDP 15 0K 2K 166960K 393 0 temp 75 5934K 137008K 166960K 226553 0 kqueue 13 20K 29K 166960K 1948 0 SYN cache 2 36K 44K 166960K 3 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 1519 0 1516 20 19 1 3 0 8 0 rtentry 112 1254 0 1151 6 2 4 4 0 8 0 unpcb 144 18387 0 18372 213 212 1 10 0 8 0 syncache 312 341 0 341 49 48 1 1 0 8 1 sackhl 24 2 93 2 1 1 0 1 0 8 0 tcpqe 32 477 0 477 42 41 1 1 0 8 1 tcpcb 808 8310 0 8272 253 247 6 16 0 8 0 arp 120 297 0 278 1 0 1 1 0 8 0 ipq 40 6 0 6 2 2 0 1 0 8 0 ipqe 40 18 0 18 2 2 0 1 0 8 0 inpcb 368 20769 0 20724 311 305 6 23 0 8 0 nd6 136 212 0 190 1 0 1 1 0 8 0 pkpcb 40 135 0 135 25 25 0 1 0 8 0 kcovpl 48 67 0 59 1 0 1 1 0 8 0 ppxss 1256 64 0 64 21 21 0 1 0 8 0 pffrag 232 214 0 210 8 7 1 1 0 482 0 pffrnode 88 214 0 210 8 7 1 1 0 8 0 pffrent 40 836 0 832 8 7 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 pfstitem 24 884 0 875 1 0 1 1 0 8 0 pfstkey 128 884 0 875 6 5 1 2 0 8 0 pfstate 376 884 0 874 27 25 2 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 8 0 7 5 4 1 3 0 8 0 art_heap4 256 3420 0 2999 60 33 27 30 0 8 0 art_table 32 3428 0 3006 5 1 4 4 0 8 0 art_node 16 1163 0 1074 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 5593 0 5583 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 93 0 76 3 0 3 3 0 8 0 dino2pl 256 43038 0 41489 98 0 98 98 0 8 0 ffsino 272 43038 0 41489 104 0 104 104 0 8 0 nchpl 144 84774 0 83126 63 0 63 63 0 8 0 uvmvnodes 80 6151 0 0 126 0 126 126 0 8 0 vnodes 216 6151 0 0 342 0 342 342 0 8 0 namei 1024 313518 0 313517 8 7 1 2 0 8 0 percpumem 16 295 0 246 1 0 1 1 0 8 0 vcpupl 2048 352 0 1 44 0 44 44 0 8 0 vmpool 696 451 0 100 33 1 32 33 0 8 0 kstatmem 264 522 0 492 5 2 3 3 0 8 0 scxspl 216 249577 0 249577 52 51 1 8 1 8 1 plimitpl 152 2845 0 2828 1 0 1 1 0 8 0 sigapl 424 31963 0 31894 24 16 8 9 0 8 0 futexpl 64 311331 0 311329 1 0 1 1 0 8 0 knotepl 120 1737 0 0 17 0 17 17 0 8 0 kqueuepl 216 5472 0 5463 115 111 4 7 0 8 3 pipepl 320 6574 0 6546 213 206 7 15 0 8 4 fdescpl 496 31543 0 31514 32 28 4 5 0 8 0 filepl 152 207556 0 207210 302 283 19 27 0 8 5 lockfpl 104 11409 0 11342 29 27 2 4 0 8 0 lockfspl 48 3841 0 3838 1 0 1 1 0 8 0 sessionpl 144 91 0 74 1 0 1 1 0 8 0 pgrppl 48 443 0 426 1 0 1 1 0 8 0 ucredpl 104 26728 0 26700 1 0 1 1 0 8 0 zombiepl 144 31895 0 31894 5 4 1 1 0 8 0 processpl 1072 31963 0 31894 5 0 5 5 0 8 0 procpl 680 80904 0 80812 25 16 9 10 0 8 0 srpgc 96 88 0 88 31 31 0 1 0 8 0 sosppl 168 458 0 453 31 30 1 1 0 8 0 sockpl 488 41124 0 41061 840 827 13 41 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 21 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 20 0 0 3 0 3 3 0 8 0 mcl4k 4096 23 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 627 0 0 32 12 20 30 0 8 0 mtagpl 96 1124 0 0 11 0 11 11 0 8 0 mbufpl 256 6852 0 0 427 0 427 427 0 8 0 bufpl 288 53528 0 47206 452 0 452 452 0 8 0 anonpl 24 2901868 0 2886311 271 153 118 128 0 186 0 amapchunkpl 152 928505 0 927542 61 19 42 47 0 158 0 amappl16 200 61972 0 61402 313 281 32 45 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 345 0 329 2 1 1 2 0 8 0 amappl13 176 99 0 98 1 0 1 1 0 8 0 amappl12 168 33131 0 33101 4 2 2 3 0 8 0 amappl11 160 80 0 63 1 0 1 1 0 8 0 amappl10 152 106 0 88 1 0 1 1 0 8 0 amappl9 144 322 0 322 40 40 0 1 0 8 0 amappl8 136 1314 0 1104 8 0 8 8 0 8 0 amappl7 128 416 0 387 2 0 2 2 0 8 0 amappl6 120 1342 0 1319 1 0 1 1 0 8 0 amappl5 112 636 0 625 1 0 1 1 0 8 0 amappl4 104 1240 0 1207 2 1 1 2 0 8 0 amappl3 96 183938 0 183843 4 1 3 3 0 8 0 amappl2 88 33378 0 33294 3 1 2 3 0 8 0 amappl1 80 124905 0 124332 24 11 13 23 0 8 0 amappl 88 293522 0 293188 9 0 9 9 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 31994 0 31614 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 31994 0 31614 3 0 3 3 0 8 0 vmmpekpl 168 202801 0 202682 6 0 6 6 0 8 0 vmmpepl 168 1845918 0 1842871 700 546 154 182 0 357 0 vmsppl 464 31993 0 31614 50 2 48 48 0 8 0 rwobjpl 56 428179 0 419957 142 22 120 120 0 8 0 pdppl 4096 63996 0 63579 1442 1023 419 421 0 8 2 pvpl 32 45990 0 0 371 0 371 371 0 265 0 pmappl 248 31993 0 31614 25 1 24 24 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3348 0 1718 48 1 47 48 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd805f070978,ffff800037666930,ffff800037666960) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037666900) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff800037666900) at namei+0x55a sys/kern/vfs_lookup.c:250 domkdirat(ffff80002a21ea98,ffffff9c,74a6ac5ad7d0,1ff) at domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 syscall(ffff800037666ae0) at syscall+0x4e6 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74a6ac5ad840, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029d2bff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029d2bff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800029d2bff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5