uvm_fault(0xffffffff82bcbd30, 0xffff8000191af004, 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 *182657 30740 0 0x2 0 0 syz-executor.7 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd80682667f8,ffff80002e882198,ffff80002e8821c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e882168) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff80002e882168) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000ffff15e0,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff80002e882340) 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, 0xffff8000191af004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd80682667f8,ffff80002e882198,ffff80002e8821c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e882168) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff80002e882168) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000ffff15e0,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff80002e882340) 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 0xffff80002e881fa0 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd807e7596e8 r8 0xffffffffffffffff r9 0xfffffd807f7d75b0 r10 0x72f2b2dbe3653815 r11 0x5e0cea10681455bb r12 0 r13 0 r14 0 r15 0xffff8000191af000 rip 0xffffffff81260e4e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002e881ea0 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb> show proc PROC (syz-executor.7) pid=182657 stat=onproc flags process=2 proc=0 pri=17, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff80002ce1e5a8,0xffff8000216f53f0 process=0xffff8000216ee010 user=0xffff80002e87d000, vmspace=0xfffffd807f012ac0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 36218 323856 34584 0 2 0 syz-executor.0 36218 151705 34584 0 2 0x4000000 syz-executor.0 93888 51655 18570 0 2 0 syz-executor.6 93888 388604 18570 0 2 0x4000000 syz-executor.6 59493 122808 1 0 3 0x100083 ttyin getty 62309 328723 28091 0 2 0x482 syz-executor.3 2357 193462 28091 0 2 0x482 syz-executor.2 *30740 182657 28091 0 7 0x2 syz-executor.7 18570 158036 28091 0 2 0x482 syz-executor.6 4857 83286 28091 0 2 0x482 syz-executor.1 99792 462846 0 0 3 0x14280 nfsidl nfsio 9306 455689 0 0 3 0x14280 nfsidl nfsio 19370 95584 0 0 3 0x14280 nfsidl nfsio 49569 399901 0 0 3 0x14280 nfsidl nfsio 36755 12829 0 0 3 0x14280 nfsidl nfsio 79724 469481 0 0 3 0x14280 nfsidl nfsio 66272 374797 0 0 3 0x14280 nfsidl nfsio 40809 151687 0 0 3 0x14280 nfsidl nfsio 29675 24510 0 0 3 0x14280 nfsidl nfsio 28854 222240 0 0 3 0x14280 nfsidl nfsio 94736 239052 0 0 3 0x14280 nfsidl nfsio 38814 397410 0 0 3 0x14280 nfsidl nfsio 55505 505027 0 0 3 0x14280 nfsidl nfsio 24203 408004 0 0 3 0x14280 nfsidl nfsio 72409 374337 0 0 3 0x14280 nfsidl nfsio 76660 368599 0 0 3 0x14280 nfsidl nfsio 8007 190363 0 0 3 0x14280 nfsidl nfsio 13192 406905 0 0 3 0x14280 nfsidl nfsio 8602 395052 0 0 3 0x14280 nfsidl nfsio 50336 458240 0 0 3 0x14280 nfsidl nfsio 49485 286123 28091 0 2 0x2 syz-executor.4 73660 251365 28091 0 3 0x82 piperd syz-executor.5 34584 220006 28091 0 2 0x482 syz-executor.0 69766 397825 0 0 3 0x14200 bored sosplice 28091 252647 30337 0 3 0x82 thrsleep syz-fuzzer 28091 22266 30337 0 2 0x4000482 syz-fuzzer 28091 102085 30337 0 3 0x4000082 thrsleep syz-fuzzer 28091 371960 30337 0 3 0x4000082 wait syz-fuzzer 28091 451944 30337 0 3 0x4000082 wait syz-fuzzer 28091 296391 30337 0 3 0x4000082 thrsleep syz-fuzzer 28091 59667 30337 0 3 0x4000082 thrsleep syz-fuzzer 28091 315138 30337 0 3 0x4000082 wait syz-fuzzer 28091 42448 30337 0 3 0x4000082 wait syz-fuzzer 28091 170845 30337 0 3 0x4000082 thrsleep syz-fuzzer 28091 452573 30337 0 3 0x4000082 wait syz-fuzzer 28091 415352 30337 0 3 0x4000082 kqread syz-fuzzer 28091 20054 30337 0 3 0x4000082 wait syz-fuzzer 28091 113156 30337 0 3 0x4000082 wait syz-fuzzer 28091 78114 30337 0 3 0x4000082 wait syz-fuzzer 30337 516275 89859 0 3 0x10008a sigsusp ksh 89859 517931 66466 0 3 0x9a kqread sshd 66466 31137 1 0 3 0x88 kqread sshd 10363 131193 2440 73 2 0x1100090 syslogd 2440 30927 1 0 3 0x100082 netio syslogd 70013 257782 1 0 3 0x100080 kqread resolvd 71731 400771 0 0 3 0x14200 bored smr 81149 364406 0 0 2 0x14200 zerothread 7730 363430 0 0 3 0x14200 aiodoned aiodoned 57292 221743 0 0 3 0x14200 syncer update 89648 357105 0 0 3 0x14200 cleaner cleaner 63942 109980 0 0 3 0x14200 reaper reaper 30683 220399 0 0 3 0x14200 pgdaemon pagedaemon 2760 178982 0 0 3 0x14200 bored viomb 79174 300 0 0 3 0x40014200 acpi0 acpi0 8224 275129 0 0 3 0x14200 bored softnet 26445 248130 0 0 3 0x14200 bored softnet 41837 238146 0 0 3 0x14200 bored softnet 29210 20205 0 0 3 0x14200 bored softnet 5857 105457 0 0 3 0x14200 bored systqmp 44574 249895 0 0 3 0x14200 bored systq 71690 267195 0 0 3 0x40014200 bored softclock 75765 508865 0 0 3 0x40014200 idle0 1 305020 0 0 3 0x80082 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 10205 6438K 7970K 78643K 16855 0 pcb 13 22K 30K 78643K 3725 0 rtable 224 17K 18K 78643K 3972 0 ifaddr 90 27K 30K 78643K 1658 0 sysctl 3 1K 1K 78643K 13 0 counters 28 17K 17K 78643K 724 0 ioctlops 0 0K 4K 78643K 2444 0 iov 0 0K 36K 78643K 4007 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1565 98K 98K 78643K 10985 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 124 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 2183 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 73K 78643K 17165 0 sigio 0 0K 0K 78643K 279 0 proc 58 43K 75K 78643K 3200 0 subproc 104 6K 7K 78643K 1040 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1028 0 in_multi 91 6K 6K 78643K 1295 0 ether_multi 1 0K 0K 78643K 60 0 mrt 1 0K 0K 78643K 56 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 91 413K 413K 78643K 91 0 exec 0 0K 1K 78643K 4025 0 pfkey data 0 0K 0K 78643K 5 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 296 90K 107K 78643K 118758 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 634 0 NDP 15 0K 1K 78643K 550 0 temp 140 5770K 71434K 78643K 190084 0 kqueue 6 10K 24K 78643K 1277 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 1776 0 1775 23 22 1 3 0 8 0 rtentry 112 1209 0 1116 7 4 3 4 0 8 0 unpcb 144 20186 0 20180 236 235 1 10 0 8 0 syncache 296 116 0 116 35 35 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 92 177 92 11 11 0 1 0 8 0 tcpcb 776 5755 0 5745 293 289 4 14 0 8 2 arp 88 180 0 164 1 0 1 1 0 8 0 ipq 40 23 0 23 11 11 0 1 0 8 0 ipqe 40 54 0 54 11 11 0 1 0 8 0 inpcb 336 16879 0 16869 559 555 4 17 0 8 2 nd6 48 272 0 250 1 0 1 1 0 8 0 pkpcb 40 69 0 69 15 15 0 1 0 8 0 kcovpl 48 80 0 72 1 0 1 1 0 8 0 mppekey 1024 17 0 17 6 6 0 1 0 8 0 ppxss 1160 488 0 488 54 53 1 1 0 8 1 pppxif 1360 244 0 244 26 26 0 1 0 8 0 pfstscr 40 14 0 7 2 1 1 1 0 8 0 pfanchor 1280 395 0 203 22 4 18 22 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 14 0 0 1 0 1 1 0 8 0 pfstkey 128 36 0 31 2 1 1 1 0 8 0 pfstate 352 18 0 11 2 1 1 1 0 8 0 rttmr 136 14 0 14 6 6 0 1 0 8 0 art_heap8 4096 3 0 2 3 2 1 2 0 8 0 art_heap4 256 5413 0 4982 74 44 30 31 0 8 0 art_table 32 5416 0 4984 4 0 4 4 0 8 0 art_node 16 1186 0 1105 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 3 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 2178 0 2168 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 27906 0 26423 94 1 93 93 0 8 0 ffsino 240 27906 0 26423 88 0 88 88 0 8 0 nchpl 144 52779 0 51149 63 1 62 63 0 8 0 rtmask 32 8 0 8 4 4 0 1 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 222157 0 222156 32 31 1 3 0 8 0 vmpool 664 72 0 72 11 11 0 1 0 8 0 kstatmem 264 726 0 696 20 17 3 3 0 8 1 scsiplug 72 18 0 18 7 7 0 1 0 8 0 scxspl 216 148054 0 148054 49 48 1 8 0 8 1 plimitpl 152 2569 0 2555 1 0 1 1 0 8 0 sigapl 424 17457 0 17397 12 4 8 8 0 8 0 futexpl 64 191758 0 191758 29 28 1 1 0 8 1 knotepl 120 236799 0 236734 193 190 3 11 0 8 0 kqueuepl 184 3816 0 3811 58 57 1 7 0 8 0 pipepl 288 4410 0 4382 116 113 3 9 0 8 0 fdescpl 432 17298 0 17277 7 4 3 4 0 8 0 filepl 120 162934 0 162714 418 409 9 17 0 8 1 lockfpl 104 3196 0 3195 5 4 1 2 0 8 0 lockfspl 48 1039 0 1038 1 0 1 1 0 8 0 sessionpl 144 99 0 84 1 0 1 1 0 8 0 pgrppl 48 519 0 504 1 0 1 1 0 8 0 ucredpl 104 38791 0 38778 1 0 1 1 0 8 0 zombiepl 144 17400 0 17397 3 2 1 1 0 8 0 processpl 1008 17457 0 17397 14 6 8 9 0 8 0 procpl 696 42599 0 42523 75 66 9 11 0 8 0 sosppl 168 187 0 186 36 35 1 1 0 8 0 sockpl 456 38946 0 38929 1383 1376 7 33 0 8 3 mcl64k 65536 684 0 684 117 117 0 1 0 8 0 mcl16k 16384 325 0 325 87 87 0 1 0 8 0 mcl12k 12288 638 0 638 112 112 0 1 0 8 0 mcl9k 9216 241 0 240 93 92 1 1 0 8 0 mcl8k 8192 1095 0 1095 114 114 0 1 0 8 0 mcl4k 4096 2456 0 2455 67 66 1 1 0 8 0 mcl2k2 2112 143 0 143 81 81 0 1 0 8 0 mcl2k 2048 112548 0 112496 59 52 7 34 0 8 0 mtagpl 96 47 0 47 5 5 0 1 0 8 0 mbufpl 256 404728 0 404601 3026 3010 16 542 0 8 0 bufpl 288 34013 0 27619 458 0 458 458 0 8 0 anonpl 24 3219304 0 3201907 228 102 126 136 0 188 0 amapchunkpl 152 346677 0 345998 153 118 35 42 0 158 2 amappl16 200 26835 0 26177 137 100 37 48 0 8 0 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 421 0 412 2 1 1 2 0 8 0 amappl13 176 50 0 47 1 0 1 1 0 8 0 amappl12 168 1258 0 1256 1 0 1 1 0 8 0 amappl11 160 44 0 40 1 0 1 1 0 8 0 amappl10 152 110 0 101 1 0 1 1 0 8 0 amappl9 144 1064 0 1064 45 45 0 1 0 8 0 amappl8 136 640 0 546 5 1 4 4 0 8 0 amappl7 128 339 0 316 2 0 2 2 0 8 0 amappl6 120 588 0 573 2 1 1 2 0 8 0 amappl5 112 605 0 601 1 0 1 1 0 8 0 amappl4 104 1481 0 1454 2 1 1 2 0 8 0 amappl3 96 48907 0 48872 2 0 2 2 0 8 0 amappl2 88 18786 0 18731 3 1 2 3 0 8 0 amappl1 80 385513 0 384974 30 16 14 26 0 8 0 amappl 88 117098 0 116934 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 17370 0 17349 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17370 0 17349 1 0 1 1 0 8 0 vmmpekpl 168 123969 0 123905 6 2 4 4 0 8 0 vmmpepl 168 1591495 0 1589168 671 537 134 158 0 357 0 vmsppl 344 17369 0 17349 3 0 3 3 0 8 0 rwobjpl 24 406395 0 398766 54 5 49 49 0 8 0 pdppl 4096 34746 0 34698 2141 2083 58 68 0 8 10 pvpl 32 6394814 0 6372524 653 442 211 360 0 265 0 pmappl 216 17369 0 17349 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 7073 0 6309 41 16 25 37 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(fffffd80682667f8,ffff80002e882198,ffff80002e8821c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e882168) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff80002e882168) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000ffff15e0,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff80002e882340) 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(fffffd80682667f8,ffff80002e882198,ffff80002e8821c8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e882168) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff80002e882168) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000ffff15e0,ffffff9c,7f7fffffb7d0,8) at dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 syscall(ffff80002e882340) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb7c0, count: -7