uvm_fault(0xffffffff83a600b0, 0xffff8000259b2004, 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 *352273 73467 0 0 0x4000000 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8068a1a540,ffff80003c8edcc0,ffff80003c8edcf0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c8edc90) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c8edc90) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a765a08,ffffff9c,200000000080,200000000300,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2111 syscall(ffff80003c8edef0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8edef0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38d8dbbcc50, 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(0xffffffff83a600b0, 0xffff8000259b2004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8068a1a540,ffff80003c8edcc0,ffff80003c8edcf0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c8edc90) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c8edc90) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a765a08,ffffff9c,200000000080,200000000300,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2111 syscall(ffff80003c8edef0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8edef0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38d8dbbcc50, count: -7 ddb> show registers rdi 0 rsi 0x2 rbp 0xffff80003c8edac0 rbx 0 rdx 0xffff8000015b84c0 rcx 0xffffffff rax 0xffff80002a765a08 r8 0xffffffffffffffff r9 0xfffffd8007ffd888 r10 0x939b7fb80647f94e r11 0xd0a55ab69f57427c r12 0xfffffd806a7b4c18 r13 0 r14 0 r15 0xffff8000259b2000 rip 0xffffffff82195103 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c8ed9d0 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=352273 pid=73467 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c8eea88,0xffffffff83a6a928 process=0xffff80003c8d8d98 user=0xffff80003c8e8000, vmspace=0xfffffd806cab7a20 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 73467 471666 96332 0 2 0 syz-executor *73467 352273 96332 0 7 0x4000000 syz-executor 42266 22926 90629 0 2 0 syz-executor 42266 339173 90629 0 3 0x4000080 fsleep syz-executor 42266 69026 90629 0 3 0x4000080 fsleep syz-executor 4341 359229 98268 0 2 0 syz-executor 4341 505083 98268 0 3 0x4000080 bell syz-executor 22118 459217 16148 0 2 0 syz-executor 22118 349482 16148 0 3 0x4000080 fsleep syz-executor 61107 356339 62718 -1 2 0x10 syz-executor 61107 38685 62718 -1 3 0x4000090 fsleep syz-executor 61107 362022 62718 -1 2 0x4000010 syz-executor 49466 88236 19110 0 2 0 syz-executor 49466 333539 19110 0 3 0x4000080 fsleep syz-executor 16148 116287 37082 0 2 0xc82 syz-executor 57328 472359 78108 0 2 0 syz-executor 57328 152142 78108 0 3 0x4000080 sbwait syz-executor 57328 245596 78108 0 3 0x4000080 msgwait syz-executor 57328 392895 78108 0 3 0x4000080 fsleep syz-executor 19314 144127 96917 0 3 0x80 nanoslp syz-executor 19314 445589 96917 0 3 0x4000080 fsleep syz-executor 19314 297342 96917 0 2 0x4000c80 syz-executor 13087 161093 1 0 3 0x82 nanoslp getty 75834 521436 0 0 3 0x14200 acct acct 78108 221667 37082 0 2 0xc82 syz-executor 90629 13930 37082 0 2 0xc82 syz-executor 62718 199440 37082 0 3 0x82 nanoslp syz-executor 19110 265068 37082 0 2 0xc82 syz-executor 98268 186953 37082 0 3 0x82 nanoslp syz-executor 96332 460408 37082 0 2 0xc82 syz-executor 96917 161364 37082 0 2 0xc82 syz-executor 37082 270865 1 0 3 0x82 kqread syz-executor 76527 494284 63555 0 3 0x98 kqread sshd-session 63555 269056 1 0 3 0x92 kqread sshd-session 57957 308850 1 73 3 0x1100090 kqread syslogd 41002 521372 0 0 3 0x14200 bored smr 12485 225164 0 0 2 0x14200 zerothread 80811 144974 0 0 3 0x14200 aiodoned aiodoned 17036 226758 0 0 3 0x14200 syncer update 74092 45414 0 0 3 0x14200 cleaner cleaner 25852 516473 0 0 3 0x14200 reaper reaper 69484 410416 0 0 3 0x14200 pgdaemon pagedaemon 1805 16452 0 0 3 0x14200 bored viomb 54638 186109 0 0 3 0x40014200 acpi0 acpi0 54511 345735 0 0 3 0x14200 bored softnet0 87208 390514 0 0 3 0x14200 bored systqmp 2922 430623 0 0 3 0x14200 bored systq 84808 458694 0 0 3 0x40014200 tmoslp softclock 53994 255686 0 0 3 0x40014200 idle0 1 520664 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 11042 12169K 12438K 166960K 12641 0 pcb 20 16K 17K 166960K 82 0 rtable 217 14K 18K 166960K 494 0 pf 34 13K 21K 166960K 108 0 ifaddr 38 6K 7K 166960K 58 0 ifgroup 51 2K 2K 166960K 69 0 sysctl 2 1K 9K 166960K 10 0 counters 34 17K 18K 166960K 41 0 ioctlops 0 0K 4K 166960K 101 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1385 87K 87K 166960K 1710 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 26 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 459 0 sigio 0 0K 0K 166960K 7 0 proc 20 25K 124K 166960K 550 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 31 0 in_multi 77 5K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 433 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 175 100K 169K 166960K 5638 0 UVM aobj 15 2K 2K 166960K 18 0 pinsyscall 26 52K 96K 166960K 1586 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 14 0K 2K 166960K 35 0 temp 45 9108K 13202K 166960K 10326 0 kqueue 5 8K 30K 166960K 71 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 57 0 57 1 0 1 1 0 8 1 rtentry 136 132 0 40 4 0 4 4 0 8 0 unpcb 144 256 0 243 4 0 4 4 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 191 0 187 13 4 9 13 0 8 8 arp 96 22 0 6 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 6 0 2 1 0 1 1 0 8 0 inpcb 328 591 0 582 12 3 9 12 0 8 7 ip6q 72 3 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 112 29 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 5 0 5 1 0 1 1 0 8 1 pfstscr 40 4 0 2 1 0 1 1 0 8 0 pfrktable 1344 22 0 22 1 0 1 1 0 8 1 pfsrclim 320 3 0 3 1 0 1 1 0 8 1 pfanchor 1288 7 0 5 1 0 1 1 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 pfrule 1360 10 0 9 1 0 1 1 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 565 0 194 29 0 29 29 0 8 4 art_table 40 567 0 194 5 0 5 5 0 8 0 art_node 32 132 0 49 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 72 23 0 13 1 0 1 1 0 8 0 shmpl 112 15 0 3 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2130 0 664 92 0 92 92 0 8 0 ffsino 256 2130 0 664 92 0 92 92 0 8 0 nchpl 144 2757 0 1057 64 0 64 64 0 8 0 vnodes 216 2456 0 0 137 0 137 137 0 8 0 namei 1024 8811 0 8810 2 0 2 2 0 8 1 pfiaddrpl 120 7 0 7 1 0 1 1 0 8 1 kstatmem 264 35 0 10 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 14455 0 14455 8 0 8 8 1 8 8 plimitpl 152 132 0 117 1 0 1 1 0 8 0 sigapl 424 744 0 707 6 0 6 6 0 8 1 knotepl 120 15921 0 15894 22 11 11 17 0 8 9 kqueuepl 184 194 0 190 4 0 4 4 0 8 3 pipepl 304 141 0 114 3 0 3 3 0 8 0 fdescpl 448 730 0 707 5 0 5 5 0 8 1 filepl 120 3977 0 3779 12 0 12 12 0 8 4 lockfpl 104 162 0 162 1 0 1 1 0 8 1 lockfspl 48 68 0 68 1 0 1 1 0 8 1 sessionpl 144 34 0 30 1 0 1 1 0 8 0 pgrppl 48 45 0 33 1 0 1 1 0 8 0 ucredpl 104 489 0 481 1 0 1 1 0 8 0 zombiepl 144 707 0 707 1 0 1 1 0 8 1 processpl 1152 744 0 707 4 0 4 4 0 8 0 procpl 664 1219 0 1169 6 0 6 6 0 8 1 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 552 917 0 895 12 3 9 12 0 8 7 mcl64k 65536 54 0 52 1 0 1 1 0 8 0 mcl8k 8192 12 0 12 1 0 1 1 0 8 1 mcl4k 4096 2927 0 2876 15 0 15 15 0 8 8 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 389 0 387 4 0 4 4 0 8 3 mtagpl 96 6 0 6 1 0 1 1 0 8 1 mbufpl 256 7900 0 7759 23 0 23 23 0 8 7 bufpl 280 7479 0 1263 445 0 445 445 0 8 0 anonpl 24 134176 0 131789 60 0 60 60 0 186 24 amapchunkpl 152 17678 0 17229 29 0 29 29 0 158 11 amappl16 200 2641 0 2619 23 6 17 19 0 8 11 amappl15 192 6 0 6 1 0 1 1 0 8 1 amappl14 184 425 0 425 1 0 1 1 0 8 1 amappl13 176 121 0 117 1 0 1 1 0 8 0 amappl12 168 977 0 955 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 57 0 55 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 0 1 1 0 8 1 amappl8 136 123 0 122 1 0 1 1 0 8 0 amappl7 128 146 0 140 1 0 1 1 0 8 0 amappl6 120 160 0 159 1 0 1 1 0 8 0 amappl5 112 94 0 90 1 0 1 1 0 8 0 amappl4 104 271 0 264 1 0 1 1 0 8 0 amappl3 96 3408 0 3310 3 0 3 3 0 8 0 amappl2 88 548 0 523 2 0 2 2 0 8 0 amappl1 80 11447 0 11125 14 0 14 14 0 8 3 amappl 88 4818 0 4670 4 0 4 4 0 92 0 uvmvnodes 80 104 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 7 0 7 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 17 0 3 1 0 1 1 0 8 0 uaddrrnd 24 730 0 707 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 730 0 707 1 0 1 1 0 8 0 vmmpekpl 168 7619 0 7588 2 0 2 2 0 8 0 vmmpepl 168 54672 0 53385 94 0 94 94 0 357 27 vmsppl 368 729 0 707 4 0 4 4 0 8 1 rwobjpl 40 18243 0 17607 13 0 13 13 0 8 0 pdppl 4096 1466 0 1414 98 34 64 82 0 8 12 pvpl 32 344056 0 337179 142 0 142 142 0 265 45 pmappl 216 729 0 707 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 389 0 38 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8068a1a540,ffff80003c8edcc0,ffff80003c8edcf0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c8edc90) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c8edc90) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a765a08,ffffff9c,200000000080,200000000300,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2111 syscall(ffff80003c8edef0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8edef0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38d8dbbcc50, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8068a1a540,ffff80003c8edcc0,ffff80003c8edcf0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c8edc90) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c8edc90) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a765a08,ffffff9c,200000000080,200000000300,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2111 syscall(ffff80003c8edef0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8edef0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x38d8dbbcc50, count: -7