uvm_fault(0xffffffff829c62c8, 0xffff80001e44f004, 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 *468676 9269 0 0 0x4000000 0K syz-executor.0 213458 63225 0 0 0x4000000 1 syz-executor.2 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806e1326b8,ffff80002466fba8,ffff80002466fbd8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002466fb78) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002466fb78) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff80002466fb78,20001,20) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021235260,ffffff9c,20000540,20000,20,ffff80002466fd60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1129 syscall(ffff80002466fdd0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002466fdd0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x17c2cb65220, count: 7 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(0xffffffff829c62c8, 0xffff80001e44f004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806e1326b8,ffff80002466fba8,ffff80002466fbd8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002466fb78) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002466fb78) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff80002466fb78,20001,20) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021235260,ffffff9c,20000540,20000,20,ffff80002466fd60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1129 syscall(ffff80002466fdd0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002466fdd0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x17c2cb65220, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002466f7e0 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd806703e800 r8 0xffffffffffffffff r9 0xfffffd807f7d8780 r10 0xca546cb732b153 r11 0x95d85c36b350f4cd r12 0 r13 0 r14 0 r15 0xffff80001e44f000 rip 0xffffffff822b65be ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002466f6e0 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb{0}> show proc PROC (syz-executor.0) pid=468676 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021234540,0xffff8000212347f0 process=0xffff80002af2d0b8 user=0xffff80002466a000, vmspace=0xfffffd80679d6a38 estcpu=36, cpticks=6, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71552 240622 66510 0 3 0x80 nanoslp syz-executor.7 71552 89004 66510 0 3 0x4000080 fsleep syz-executor.7 71552 64398 66510 0 3 0x4000080 fsleep syz-executor.7 9269 433476 76653 0 2 0 syz-executor.0 * 9269 468676 76653 0 7 0x4000000 syz-executor.0 9269 272219 76653 0 2 0x4000000 syz-executor.0 63225 140481 88868 0 2 0 syz-executor.2 63225 213458 88868 0 7 0x4000000 syz-executor.2 63225 10387 88868 0 2 0x4000000 syz-executor.2 63225 96137 88868 0 2 0x4000000 syz-executor.2 88868 95671 3573 0 2 0x482 syz-executor.2 76653 217007 3573 0 2 0x482 syz-executor.0 96489 280852 3573 0 2 0x482 syz-executor.6 51331 16962 0 0 3 0x14280 nfsidl nfsio 41263 20767 0 0 3 0x14280 nfsidl nfsio 97161 39547 0 0 3 0x14280 nfsidl nfsio 81573 121732 0 0 3 0x14280 nfsidl nfsio 76622 238377 0 0 3 0x14280 nfsidl nfsio 19273 336965 0 0 3 0x14280 nfsidl nfsio 71407 221344 0 0 3 0x14280 nfsidl nfsio 71107 11981 0 0 3 0x14280 nfsidl nfsio 24190 379937 0 0 3 0x14280 nfsidl nfsio 58413 95008 0 0 3 0x14280 nfsidl nfsio 66665 286825 0 0 3 0x14280 nfsidl nfsio 54129 417910 0 0 3 0x14280 nfsidl nfsio 13071 211482 0 0 3 0x14280 nfsidl nfsio 9070 265327 0 0 3 0x14280 nfsidl nfsio 52674 193509 0 0 3 0x14280 nfsidl nfsio 63217 268791 0 0 3 0x14280 nfsidl nfsio 46730 346577 0 0 3 0x14280 nfsidl nfsio 44604 99980 0 0 3 0x14280 nfsidl nfsio 23791 95517 0 0 3 0x14280 nfsidl nfsio 38431 398788 0 0 3 0x14280 nfsidl nfsio 90833 38503 0 0 3 0x14200 bored sosplice 66510 481664 3573 0 2 0x482 syz-executor.7 20407 453938 3573 0 2 0x482 syz-executor.1 3573 176048 85607 0 3 0x82 kqread syz-fuzzer 3573 2463 85607 0 2 0x4000482 syz-fuzzer 3573 203483 85607 0 3 0x4000082 thrsleep syz-fuzzer 3573 315414 85607 0 3 0x4000082 thrsleep syz-fuzzer 3573 463683 85607 0 3 0x4000082 thrsleep syz-fuzzer 3573 157020 85607 0 3 0x4000082 thrsleep syz-fuzzer 3573 197672 85607 0 3 0x4000082 thrsleep syz-fuzzer 3573 39705 85607 0 3 0x4000082 thrsleep syz-fuzzer 3573 152668 85607 0 3 0x4000082 thrsleep syz-fuzzer 85607 153254 10044 0 3 0x10008a sigsusp ksh 10044 53861 50375 0 3 0x9a kqread sshd 43227 222649 1 0 3 0x100083 ttyin getty 50375 450661 1 0 3 0x88 kqread sshd 53780 219674 68478 74 3 0x1100092 bpf pflogd 68478 230375 1 0 3 0x80 netio pflogd 61213 111804 62306 73 2 0x1100090 syslogd 62306 315032 1 0 3 0x100082 netio syslogd 51107 257626 1 0 3 0x100080 kqread resolvd 41105 443050 95851 77 3 0x100092 kqread dhcpleased 30292 241661 95851 77 3 0x100092 kqread dhcpleased 95851 117335 1 0 3 0x80 kqread dhcpleased 2767 351743 0 0 3 0x14200 bored smr 64617 72134 0 0 2 0x14200 zerothread 21189 220400 0 0 3 0x14200 aiodoned aiodoned 84958 500204 0 0 3 0x14200 syncer update 26619 295545 0 0 3 0x14200 cleaner cleaner 10265 262763 0 0 3 0x14200 reaper reaper 83433 123382 0 0 3 0x14200 pgdaemon pagedaemon 45452 97319 0 0 3 0x14200 bored viomb 69099 130541 0 0 3 0x40014200 acpi0 acpi0 34051 107090 0 0 3 0x40014200 idle1 4392 235858 0 0 3 0x14200 bored softnet 46695 438574 0 0 3 0x14200 bored systqmp 96099 101389 0 0 3 0x14200 bored systq 23205 335574 0 0 2 0x40014200 softclock 64157 489572 0 0 3 0x40014200 idle0 1 460247 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 9269 (syz-executor.0) thread 0xffff800021235260 (468676) exclusive rrwlock inode r = 0 (0xfffffd8073595808) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 vn_open+0x105 sys/kern/vfs_vnops.c:146 #8 doopenat+0x26a sys/kern/vfs_syscalls.c:1129 #9 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82ad3b18) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 6568K 7468K 78643K 42866 0 pcb 13 14K 16K 78643K 891 0 rtable 238 10K 11K 78643K 1681 0 ifaddr 87 18K 19K 78643K 587 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 122 0 ioctlops 0 0K 8K 78643K 2583 0 iov 0 0K 28K 78643K 533 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1435 90K 90K 78643K 8132 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 55 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 13 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 85K 78643K 6153 0 sigio 0 0K 0K 78643K 278 0 proc 70 87K 123K 78643K 1131 0 subproc 104 6K 6K 78643K 273 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 116 0 in_multi 87 6K 6K 78643K 479 0 ether_multi 1 0K 0K 78643K 52 0 mrt 0 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 1524 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 7 26K 26K 78643K 7 0 UVM amap 402 334K 349K 78643K 80091 0 UVM aobj 131 8K 8K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 174 0 NDP 12 0K 1K 78643K 113 0 temp 131 4705K 4833K 78643K 39835 0 kqueue 12 18K 26K 78643K 295 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 470 0 467 7 6 1 3 0 8 0 rtentry 112 505 0 405 4 0 4 4 0 8 0 unpcb 136 2883 0 2868 32 26 6 6 0 8 5 syncache 296 15 0 15 4 4 0 1 0 8 0 tcpqe 32 5 0 5 2 2 0 1 0 8 0 tcpcb 736 2037 0 2022 56 51 5 12 0 8 3 arp 120 52 0 33 1 0 1 1 0 8 0 inpcb 304 6721 0 6711 67 60 7 12 0 8 6 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 100 0 77 1 0 1 1 0 8 0 pkpcb 40 28 0 28 4 4 0 1 0 8 0 kcovpl 48 21 0 13 1 0 1 1 0 8 0 pfstscr 40 12 0 12 2 2 0 1 0 8 0 pffrag 232 22 0 21 4 3 1 1 0 482 0 pffrnode 88 22 0 21 4 3 1 1 0 8 0 pffrent 40 521 0 520 5 4 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 pfrktable 1344 81 0 74 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 59 0 57 1 0 1 1 0 8 0 pfstkey 112 67 0 65 2 1 1 2 0 8 0 pfstate 320 61 0 59 4 3 1 4 0 8 0 pfrule 1360 337 0 313 4 1 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1690 0 1261 38 11 27 31 0 8 0 art_table 32 1691 0 1261 4 0 4 4 0 8 0 art_node 16 504 0 414 1 0 1 1 0 8 0 sysvmsgpl 40 29 0 6 1 0 1 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8864 0 7419 91 0 91 91 0 8 0 ffsino 272 8864 0 7419 97 0 97 97 0 8 0 nchpl 144 16562 0 14936 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 60084 0 60083 4 3 1 2 0 8 0 percpumem 16 73 0 33 1 0 1 1 0 8 0 vcpupl 2048 22 0 0 3 0 3 3 0 8 0 vmpool 560 25 0 3 2 0 2 2 0 8 0 pfiaddrpl 120 27 0 20 3 2 1 1 0 8 0 scsiplug 72 6 0 6 1 1 0 1 0 8 0 scxspl 216 51543 0 51543 15 12 3 8 0 8 3 plimitpl 152 749 0 734 1 0 1 1 0 8 0 sigapl 424 6469 0 6406 10 2 8 8 0 8 0 futexpl 64 53805 0 53803 3 2 1 1 0 8 0 knotepl 120 255 0 0 6 0 6 6 0 8 0 kqueuepl 216 954 0 946 15 14 1 5 0 8 0 pipepl 336 1218 0 1193 41 35 6 11 0 8 3 fdescpl 496 6412 0 6386 5 1 4 5 0 8 0 filepl 152 40909 0 40673 80 63 17 19 0 8 7 lockfpl 104 1471 0 1469 3 2 1 2 0 8 0 lockfspl 48 538 0 536 1 0 1 1 0 8 0 sessionpl 144 37 0 20 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 96 3736 0 3722 1 0 1 1 0 8 0 zombiepl 144 6411 0 6406 3 2 1 1 0 8 0 processpl 1064 6469 0 6406 6 1 5 5 0 8 0 procpl 672 18111 0 18033 18 10 8 9 0 8 0 srpgc 96 8 0 8 4 4 0 1 0 8 0 sosppl 168 37 0 37 7 7 0 1 0 8 0 sockpl 480 10112 0 10087 177 165 12 29 0 8 8 mcl64k 65536 23 0 0 3 0 3 3 0 8 0 mcl16k 16384 21 0 0 3 1 2 3 0 8 0 mcl12k 12288 22 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 33 0 0 3 0 3 3 0 8 1 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 353 0 0 28 0 28 28 0 8 0 mtagpl 96 1791 0 0 41 0 41 41 0 8 0 mbufpl 256 2110 0 0 123 1 122 122 0 8 0 bufpl 288 11583 0 5247 453 0 453 453 0 8 0 anonpl 24 1871536 0 1850898 254 110 144 175 0 186 7 amapchunkpl 152 195082 0 194242 68 27 41 48 0 158 0 amappl16 200 20073 0 19384 90 47 43 50 0 8 2 amappl15 192 1744 0 1739 1 0 1 1 0 8 0 amappl14 184 787 0 787 1 0 1 1 0 8 1 amappl13 176 900 0 896 1 0 1 1 0 8 0 amappl12 168 2118 0 2114 2 1 1 1 0 8 0 amappl11 160 46 0 31 1 0 1 1 0 8 0 amappl10 152 194 0 187 1 0 1 1 0 8 0 amappl9 144 1361 0 1354 1 0 1 1 0 8 0 amappl8 136 1070 0 974 4 0 4 4 0 8 0 amappl7 128 264 0 252 1 0 1 1 0 8 0 amappl6 120 1156 0 1127 2 1 1 2 0 8 0 amappl5 112 5061 0 5040 1 0 1 1 0 8 0 amappl4 104 1701 0 1671 2 0 2 2 0 8 0 amappl3 96 3501 0 3488 1 0 1 1 0 8 0 amappl2 88 1884 0 1836 3 1 2 3 0 8 0 amappl1 80 117491 0 116940 19 5 14 19 0 8 0 amappl 88 79204 0 78947 9 1 8 8 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 6437 0 6389 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6437 0 6389 1 0 1 1 0 8 0 vmmpekpl 168 52552 0 52485 4 0 4 4 0 8 0 vmmpepl 168 585992 0 583453 252 118 134 173 0 357 6 vmsppl 368 6436 0 6389 6 1 5 5 0 8 0 rwobjpl 56 150168 0 142398 128 15 113 115 0 8 2 pdppl 4096 12881 0 12800 350 259 91 91 0 8 10 pvpl 32 3166134 0 3142339 433 210 223 297 0 265 15 pmappl 248 6436 0 6389 5 1 4 4 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1313 0 365 28 0 28 28 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806e1326b8,ffff80002466fba8,ffff80002466fbd8) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002466fb78) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002466fb78) at namei+0x36a sys/kern/vfs_lookup.c:245 vn_open(ffff80002466fb78,20001,20) at vn_open+0x105 sys/kern/vfs_vnops.c:146 doopenat(ffff800021235260,ffffff9c,20000540,20000,20,ffff80002466fd60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1129 syscall(ffff80002466fdd0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002466fdd0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x17c2cb65220, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82ad3910) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ad3910) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800024669950) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800024669950) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72db4508ee0, count: 9 ddb{1}> tc No such command