uvm_fault(0xffffffff83a35678, 0xffff800028712004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *196591 31095 0 0x2 0 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffc006e3d12d8,ffff80003b8e0f10,ffff80003b8e0f40) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003b8e0ee0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003b8e0ee0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 domkdirat(ffff8000318b0018,ffffff9c,731bf8113590,1ff) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 syscall(ffff80003b8e10b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003b8e10b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x731bf8113630, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83a35678, 0xffff800028712004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffc006e3d12d8,ffff80003b8e0f10,ffff80003b8e0f40) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003b8e0ee0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003b8e0ee0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 domkdirat(ffff8000318b0018,ffffff9c,731bf8113590,1ff) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 syscall(ffff80003b8e10b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003b8e10b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x731bf8113630, count: -7 ddb> show registers rdi 0 rsi 0x2 rbp 0xffff80003b8e0c70 rbx 0 rdx 0 rcx 0xffffffff rax 0xffff8000318b0018 r8 0xffffffffffffffff r9 0xfffffc0007ffd680 r10 0x9a9782a7a5a2a51a r11 0xdb5edf9cd8809b7d r12 0xfffffc005ea24668 r13 0 r14 0 r15 0xffff800028712000 rip 0xffffffff81a3d143 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003b8e0b80 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=196591 pid=31095 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c8fad18,0xffff8000318b1250 process=0xffff800045ffad18 user=0xffff80003b8dc000, vmspace=0xfffffc007f233730 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 92099 478194 75924 0 2 0 syz-executor 92099 157884 75924 0 3 0x4000080 fsleep syz-executor *31095 196591 85836 0 7 0x2 syz-executor 8815 335412 1 0 3 0x100083 ttyin getty 71598 153793 0 0 3 0x14200 acct acct 75924 96763 85836 0 2 0xc82 syz-executor 99484 68095 85836 0 2 0xc82 syz-executor 53678 370218 85836 0 2 0xc82 syz-executor 85836 186357 1 0 3 0x82 wait syz-executor 7635 401477 1 73 3 0x1100090 kqread syslogd 93588 302461 0 0 2 0x14200 smr 83517 51216 0 0 2 0x14200 zerothread 85833 1902 0 0 3 0x14200 aiodoned aiodoned 83509 401916 0 0 3 0x14200 syncer update 71181 204405 0 0 3 0x14200 cleaner cleaner 38335 442701 0 0 3 0x14200 reaper reaper 36343 295053 0 0 3 0x14200 pgdaemon pagedaemon 68499 438154 0 0 3 0x14200 bored viomb 12520 376590 0 0 3 0x40014200 acpi0 acpi0 91402 65855 0 0 3 0x14200 bored softnet0 22810 54556 0 0 3 0x14200 smrbar systqmp 61620 145662 0 0 3 0x14200 bored systq 96993 233677 0 0 3 0x40014200 tmoslp softclock 33647 198435 0 0 3 0x40014200 idle0 1 463003 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 11067 12263K 12498K 166960K 12757 0 pcb 17 15K 16K 166960K 232 0 rtable 180 6K 8K 166960K 718 0 pf 34 13K 19K 166960K 114 0 ifaddr 36 6K 7K 166960K 98 0 ifgroup 50 2K 2K 166960K 113 0 sysctl 4 1K 9K 166960K 10 0 counters 33 17K 18K 166960K 56 0 ioctlops 0 0K 4K 166960K 136 0 iov 0 0K 16K 166960K 55 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1384 87K 87K 166960K 1944 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 24 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 12 41K 236K 166960K 830 0 sigio 0 0K 0K 166960K 5 0 proc 20 25K 116K 166960K 850 0 subproc 63 3K 4K 166960K 164 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 59 0 in_multi 74 5K 7K 166960K 228 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 584 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 111 86K 175K 166960K 8315 0 UVM aobj 28 4K 4K 166960K 29 0 pinsyscall 16 32K 95K 166960K 2183 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 20 0 NDP 13 0K 2K 166960K 66 0 temp 50 9114K 9187K 166960K 27490 0 kqueue 3 4K 29K 166960K 129 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 77 0 77 1 0 1 1 0 8 1 rtentry 136 231 0 158 4 0 4 4 0 8 0 unpcb 144 287 0 283 2 0 2 2 0 8 1 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpcb 736 149 0 148 1 0 1 1 0 8 0 arp 96 38 0 24 1 0 1 1 0 8 0 ipq 40 7 0 0 1 0 1 1 0 8 0 ipqe 40 7 0 0 1 0 1 1 0 8 0 inpcb 328 696 0 695 7 0 7 7 0 8 6 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 112 60 0 44 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 18 0 11 1 0 1 1 0 8 0 ppxss 1072 11 0 11 1 0 1 1 0 8 1 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pfrktable 1344 5 0 5 1 0 1 1 0 8 1 pfsrclim 320 4 0 4 1 0 1 1 0 8 1 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 2 0 2 1 0 1 1