uvm_fault(0xffffffff82bcbd30, 0xffff80001ab2f004, 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 *133093 65032 0 0x2 0 0 syz-executor.1 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd80680a7958,ffff800024b688e8,ffff800024b68918) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800024b688b8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800024b688b8) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff800027ff38e8,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800024b68a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb7c0, 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(0xffffffff82bcbd30, 0xffff80001ab2f004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd80680a7958,ffff800024b688e8,ffff800024b68918) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800024b688b8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800024b688b8) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff800027ff38e8,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800024b68a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb7c0, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff800024b686f0 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd8069ae8a40 r8 0xffffffffffffffff r9 0xfffffd807f7d7680 r10 0x48a8c9772d323ee1 r11 0x444b7a3178223f50 r12 0 r13 0 r14 0 r15 0xffff80001ab2f000 rip 0xffffffff81260e4e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800024b685f0 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb> show proc PROC (syz-executor.1) pid=133093 stat=onproc flags process=2 proc=0 pri=84, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff800027ff1bb8,0xffff800021717348 process=0xffff8000fffef7b0 user=0xffff800024b63000, vmspace=0xfffffd8069b60ad0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 2008 136608 97431 0 2 0 syz-executor.7 2008 265432 97431 0 3 0x4000080 fsleep syz-executor.7 2008 336164 97431 0 3 0x4000000 biowait syz-executor.7 8172 78244 43633 0 2 0 syz-executor.0 8172 317316 43633 0 3 0x4000080 fsleep syz-executor.0 39362 130074 20608 0 2 0 syz-executor.5 39362 189906 20608 0 3 0x4000080 fsleep syz-executor.5 3419 4463 88097 0 3 0x80 nanoslp syz-executor.2 3419 383473 88097 0 2 0x4000000 syz-executor.2 3419 83881 88097 0 3 0x4000080 fsleep syz-executor.2 36853 429895 95801 0 2 0x10 syz-executor.6 36853 205139 95801 0 3 0x4000090 fsleep syz-executor.6 36853 27354 95801 0 3 0x4000090 fsleep syz-executor.6 62262 199913 15664 0 2 0x480 syz-executor.4 62262 460371 15664 0 3 0x4000080 netio syz-executor.4 62262 29003 15664 0 3 0x4000080 fsleep syz-executor.4 *65032 133093 22119 0 7 0x2 syz-executor.1 97431 278294 22119 0 3 0x82 nanoslp syz-executor.7 20608 259084 22119 0 3 0x82 nanoslp syz-executor.5 15664 60232 22119 0 3 0x82 nanoslp syz-executor.4 43633 152060 22119 0 2 0x482 syz-executor.0 88097 24710 22119 0 3 0x82 nanoslp syz-executor.2 95801 469773 22119 0 3 0x82 nanoslp syz-executor.6 38069 244898 22119 0 2 0x482 syz-executor.3 84351 255829 0 0 3 0x14280 nfsidl nfsio 76890 139747 0 0 3 0x14280 nfsidl nfsio 87912 304263 0 0 3 0x14280 nfsidl nfsio 6201 256585 0 0 3 0x14280 nfsidl nfsio 69634 229690 0 0 3 0x14280 nfsidl nfsio 32698 251729 0 0 3 0x14280 nfsidl nfsio 62503 149753 0 0 3 0x14280 nfsidl nfsio 54341 464885 0 0 3 0x14280 nfsidl nfsio 61677 448035 0 0 3 0x14280 nfsidl nfsio 47374 160477 0 0 3 0x14280 nfsidl nfsio 76981 393530 0 0 3 0x14280 nfsidl nfsio 2954 348106 0 0 3 0x14280 nfsidl nfsio 34779 57535 0 0 3 0x14280 nfsidl nfsio 13046 211981 0 0 3 0x14280 nfsidl nfsio 67441 136309 0 0 3 0x14280 nfsidl nfsio 1333 354990 0 0 3 0x14280 nfsidl nfsio 58043 446702 0 0 3 0x14280 nfsidl nfsio 98828 144421 0 0 3 0x14280 nfsidl nfsio 3587 33763 0 0 3 0x14280 nfsidl nfsio 9829 306851 0 0 3 0x14280 nfsidl nfsio 96987 479983 0 0 3 0x14200 bored sosplice 22119 230606 2151 0 3 0x82 thrsleep syz-fuzzer 22119 203268 2151 0 3 0x4000082 nanoslp syz-fuzzer 22119 395383 2151 0 3 0x4000082 wait syz-fuzzer 22119 483741 2151 0 3 0x4000082 wait syz-fuzzer 22119 322490 2151 0 3 0x4000082 kqread syz-fuzzer 22119 246077 2151 0 3 0x4000082 thrsleep syz-fuzzer 22119 223503 2151 0 3 0x4000082 thrsleep syz-fuzzer 22119 95266 2151 0 3 0x4000082 wait syz-fuzzer 22119 511340 2151 0 3 0x4000082 wait syz-fuzzer 22119 405666 2151 0 3 0x4000082 wait syz-fuzzer 22119 102555 2151 0 3 0x4000082 thrsleep syz-fuzzer 22119 61001 2151 0 3 0x4000082 wait syz-fuzzer 22119 244227 2151 0 3 0x4000082 wait syz-fuzzer 22119 253159 2151 0 3 0x4000082 wait syz-fuzzer 2151 357466 97904 0 3 0x10008a sigsusp ksh 97904 170630 65403 0 3 0x9a kqread sshd 98791 466103 1 0 3 0x100083 ttyin getty 65403 478112 1 0 3 0x88 kqread sshd 78935 177114 30981 73 3 0x1100090 kqread syslogd 30981 288178 1 0 3 0x100082 netio syslogd 52443 350430 1 0 3 0x100080 kqread resolvd 71205 250486 9697 77 3 0x100092 kqread dhcpleased 3885 165899 9697 77 3 0x100092 kqread dhcpleased 9697 165332 1 0 3 0x80 kqread dhcpleased 3713 361123 0 0 3 0x14200 bored smr 43906 507659 0 0 2 0x14200 zerothread 45993 64244 0 0 3 0x14200 aiodoned aiodoned 85461 175637 0 0 3 0x14200 syncer update 30072 414720 0 0 3 0x14200 cleaner cleaner 68953 66847 0 0 3 0x14200 reaper reaper 61185 110862 0 0 3 0x14200 pgdaemon pagedaemon 88596 174798 0 0 3 0x14200 bored viomb 86282 332145 0 0 3 0x40014200 acpi0 acpi0 79291 412340 0 0 3 0x14200 bored softnet 77407 224208 0 0 3 0x14200 bored softnet 99724 326888 0 0 3 0x14200 bored softnet 52440 400588 0 0 3 0x14200 bored softnet 308 28696 0 0 3 0x14200 bored systqmp 33945 320327 0 0 3 0x14200 bored systq 82561 119995 0 0 3 0x40014200 bored softclock 23775 316025 0 0 3 0x40014200 idle0 1 13130 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 10216 6487K 6868K 78643K 20742 0 pcb 13 18K 22K 78643K 1942 0 rtable 216 15K 16K 78643K 3661 0 ifaddr 89 25K 27K 78643K 937 0 sysctl 2 0K 0K 78643K 2 0 counters 28 17K 17K 78643K 259 0 ioctlops 0 0K 4K 78643K 930 0 iov 1 0K 28K 78643K 1219 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1404 88K 88K 78643K 6711 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 90 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1314 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 73K 78643K 7911 0 sigio 0 0K 0K 78643K 345 0 proc 60 59K 83K 78643K 2220 0 subproc 104 6K 6K 78643K 849 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 427 0 in_multi 93 6K 7K 78643K 1358 0 ether_multi 1 0K 0K 78643K 35 0 mrt 1 0K 0K 78643K 35 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 163 731K 731K 78643K 163 0 exec 0 0K 1K 78643K 2054 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 319 89K 150K 78643K 51124 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 291 0 NDP 13 0K 1K 78643K 353 0 temp 132 5770K 6806K 78643K 114849 0 kqueue 14 22K 28K 78643K 1386 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 120 629 0 626 5 4 1 3 0 8 0 rtentry 112 1175 0 1082 6 3 3 4 0 8 0 unpcb 144 5986 0 5935 63 57 6 8 0 8 4 syncache 296 48 0 48 15 14 1 1 0 8 1 tcpqe 32 388 0 388 10 9 1 1 0 8 1 tcpcb 776 8038 0 7898 189 175 14 15 0 8 0 arp 88 139 0 123 1 0 1 1 0 8 0 ipq 40 4 0 2 2 1 1 1 0 8 0 ipqe 40 7 0 5 2 1 1 1 0 8 0 inpcb 336 14222 0 14079 189 177 12 18 0 8 0 nd6 48 283 0 262 1 0 1 1 0 8 0 pkpcb 40 14 0 14 3 3 0 1 0 8 0 kcovpl 48 65 0 57 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1160 129 0 129 15 14 1 1 0 8 1 pppxif 1360 101 0 101 12 11 1 1 0 8 1 pfstscr 40 153 0 148 1 0 1 1 0 8 0 pfanchor 1280 989 42 477 49 6 43 43 0 8 0 pfqueue 264 27 0 27 6 6 0 1 0 8 0 pfstitem 24 26 0 18 1 0 1 1 0 8 0 pfstkey 128 300 0 285 1 0 1 1 0 8 0 pfstate 352 150 0 146 1 0 1 1 0 8 0 rttmr 136 9 0 9 2 2 0 1 0 8 0 art_heap8 4096 6 0 4 4 2 2 3 0 8 0 art_heap4 256 6350 0 5933 60 33 27 30 0 8 0 art_table 32 6356 0 5937 5 1 4 4 0 8 0 art_node 16 1169 0 1088 1 0 1 1 0 8 0 sysvmsgpl 40 42 0 39 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1312 0 1302 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 12461 0 10998 92 0 92 92 0 8 0 ffsino 240 12461 0 10998 87 0 87 87 0 8 0 nchpl 144 23601 0 21955 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 89780 0 89778 11 10 1 3 0 8 0 vmpool 664 80 0 80 7 7 0 1 0 8 0 kstatmem 264 278 0 252 3 0 3 3 0 8 1 scsiplug 72 11 0 11 3 3 0 1 0 8 0 scxspl 216 81958 0 81957 23 22 1 8 0 8 0 plimitpl 152 1158 0 1141 1 0 1 1 0 8 0 sigapl 424 8105 0 8040 9 1 8 8 0 8 0 futexpl 64 85789 0 85782 9 8 1 1 0 8 0 knotepl 120 153147 0 153058 91 86 5 17 0 8 1 kqueuepl 184 2390 0 2379 27 26 1 4 0 8 0 pipepl 288 4640 0 4611 74 67 7 10 0 8 4 fdescpl 432 8059 0 8032 7 3 4 4 0 8 0 filepl 120 72389 0 71969 126 112 14 17 0 8 1 lockfpl 104 1459 0 1457 4 3 1 2 0 8 0 lockfspl 48 521 0 519 1 0 1 1 0 8 0 sessionpl 144 80 0 64 1 0 1 1 0 8 0 pgrppl 48 111 0 95 1 0 1 1 0 8 0 ucredpl 104 8933 0 8921 1 0 1 1 0 8 0 zombiepl 144 8041 0 8040 3 2 1 1 0 8 0 processpl 1008 8105 0 8040 10 1 9 9 0 8 0 procpl 696 19509 0 19421 18 8 10 10 0 8 0 sosppl 168 90 0 90 10 10 0 1 0 8 0 sockpl 456 20873 0 20676 509 484 25 34 0 8 0 mcl64k 65536 523 0 523 26 25 1 1 0 8 1 mcl16k 16384 162 0 162 24 23 1 1 0 8 1 mcl12k 12288 302 0 302 36 35 1 1 0 8 1 mcl9k 9216 127 0 127 28 27 1 1 0 8 1 mcl8k 8192 455 0 455 21 20 1 1 0 8 1 mcl4k 4096 887 0 887 21 20 1 1 0 8 1 mcl2k2 2112 60 0 60 23 22 1 1 0 8 1 mcl2k 2048 95247 0 95172 84 73 11 39 0 8 0 mtagpl 96 770 0 692 11 9 2 5 0 8 0 mbufpl 256 237952 0 237659 488 464 24 86 0 8 0 bufpl 288 17570 0 11173 458 0 458 458 0 8 0 anonpl 24 1633545 0 1616220 322 201 121 183 0 188 0 amapchunkpl 152 172511 0 171781 414 382 32 344 0 158 0 amappl16 200 16719 0 16117 132 99 33 57 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 357 0 345 2 1 1 2 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 1115 0 1112 1 0 1 1 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 91 0 82 1 0 1 1 0 8 0 amappl9 144 1045 0 1044 1 0 1 1 0 8 0 amappl8 136 375 0 313 3 0 3 3 0 8 0 amappl7 128 280 0 256 2 0 2 2 0 8 0 amappl6 120 577 0 564 2 1 1 2 0 8 0 amappl5 112 500 0 493 1 0 1 1 0 8 0 amappl4 104 1146 0 1121 2 1 1 2 0 8 0 amappl3 96 22217 0 22161 2 0 2 2 0 8 0 amappl2 88 8903 0 8832 3 1 2 3 0 8 0 amappl1 80 180685 0 179949 38 21 17 26 0 8 0 amappl 88 49989 0 49802 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 8139 0 8112 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8139 0 8112 1 0 1 1 0 8 0 vmmpekpl 168 73127 0 73079 3 0 3 3 0 8 0 vmmpepl 168 757991 0 755226 385 250 135 154 0 357 6 vmsppl 344 8138 0 8112 3 0 3 3 0 8 0 rwobjpl 24 196773 0 188990 54 5 49 50 0 8 0 pdppl 4096 16284 0 16224 638 574 64 68 0 8 4 pvpl 32 3317210 0 3294091 612 404 208 361 0 265 0 pmappl 216 8138 0 8112 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2296 0 1502 26 1 25 25 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(fffffd80680a7958,ffff800024b688e8,ffff800024b68918) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800024b688b8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800024b688b8) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff800027ff38e8,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800024b68a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb7c0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd80680a7958,ffff800024b688e8,ffff800024b68918) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800024b688b8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800024b688b8) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff800027ff38e8,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff800024b68a90) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb7c0, count: -7