uvm_fault(0xffffffff82ad8f78, 0xffff80001aa7f004, 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 *245811 96475 0 0 0 0K syz-executor.5 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806bffc6d0,ffff80002e39b648,ffff80002e39b678) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e39b618) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002e39b618) at namei+0x36a sys/kern/vfs_lookup.c:245 sys_chdir(ffff8000245087e8,ffff80002e39b720,ffff80002e39b780) at sys_chdir+0x72 change_dir sys/kern/vfs_syscalls.c:845 [inline] sys_chdir(ffff8000245087e8,ffff80002e39b720,ffff80002e39b780) at sys_chdir+0x72 sys/kern/vfs_syscalls.c:791 syscall(ffff80002e39b7f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e39b7f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb840, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82ad8f78, 0xffff80001aa7f004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806bffc6d0,ffff80002e39b648,ffff80002e39b678) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e39b618) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002e39b618) at namei+0x36a sys/kern/vfs_lookup.c:245 sys_chdir(ffff8000245087e8,ffff80002e39b720,ffff80002e39b780) at sys_chdir+0x72 change_dir sys/kern/vfs_syscalls.c:845 [inline] sys_chdir(ffff8000245087e8,ffff80002e39b720,ffff80002e39b780) at sys_chdir+0x72 sys/kern/vfs_syscalls.c:791 syscall(ffff80002e39b7f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e39b7f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb840, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002e39b450 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd8065dc9380 r8 0xffffffffffffffff r9 0xfffffd807f7d7540 r10 0x92f239095b7e5b71 r11 0xab594bfec1d0dc32 r12 0 r13 0 r14 0 r15 0xffff80001aa7f000 rip 0xffffffff825009be ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002e39b350 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb{0}> show proc PROC (syz-executor.5) pid=245811 stat=onproc flags process=0 proc=0 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800024508d28,0xffff800024508a98 process=0xffff80002e360448 user=0xffff80002e396000, vmspace=0xfffffd807d1338b8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6388 367801 86965 0 2 0 syz-executor.7 27185 236924 84028 0 2 0 syz-executor.3 *96475 245811 92469 0 7 0 syz-executor.5 62248 457701 83595 0 2 0 syz-executor.4 62248 150394 83595 0 2 0x4000000 syz-executor.4 38019 273441 17786 0 2 0 syz-executor.0 92469 435404 47446 0 2 0x2 syz-executor.5 17786 164423 47446 0 3 0x82 nanoslp syz-executor.0 83595 153039 47446 0 3 0x82 nanoslp syz-executor.4 86965 88508 47446 0 3 0x82 nanoslp syz-executor.7 195 464855 47446 0 2 0x2 syz-executor.2 84028 152223 47446 0 3 0x82 nanoslp syz-executor.3 59739 499021 0 0 3 0x14280 nfsidl nfsio 90653 143663 0 0 3 0x14280 nfsidl nfsio 13987 308865 0 0 3 0x14280 nfsidl nfsio 93813 172849 0 0 3 0x14280 nfsidl nfsio 89747 106180 0 0 3 0x14280 nfsidl nfsio 902 105658 0 0 3 0x14280 nfsidl nfsio 43686 522322 0 0 3 0x14280 nfsidl nfsio 29108 74662 0 0 3 0x14280 nfsidl nfsio 36598 88610 0 0 3 0x14280 nfsidl nfsio 60250 27888 0 0 3 0x14280 nfsidl nfsio 75929 356863 0 0 3 0x14280 nfsidl nfsio 61112 416575 0 0 3 0x14280 nfsidl nfsio 9404 356619 0 0 3 0x14280 nfsidl nfsio 86330 233029 0 0 3 0x14280 nfsidl nfsio 68450 349748 0 0 3 0x14280 nfsidl nfsio 10591 389513 0 0 3 0x14280 nfsidl nfsio 40531 130649 0 0 3 0x14280 nfsidl nfsio 43177 466040 0 0 3 0x14280 nfsidl nfsio 714 268902 0 0 3 0x14280 nfsidl nfsio 56726 281251 0 0 3 0x14280 nfsidl nfsio 40763 501459 1 0 3 0x100083 ttyin getty 31982 135229 0 0 3 0x14200 bored sosplice 47446 59002 77162 0 3 0x82 thrsleep syz-fuzzer 47446 188019 77162 0 3 0x4000082 nanoslp syz-fuzzer 47446 85041 77162 0 3 0x4000082 thrsleep syz-fuzzer 47446 360785 77162 0 3 0x4000082 thrsleep syz-fuzzer 47446 464841 77162 0 3 0x4000082 thrsleep syz-fuzzer 47446 42012 77162 0 3 0x4000082 thrsleep syz-fuzzer 47446 456464 77162 0 3 0x4000082 thrsleep syz-fuzzer 47446 3408 77162 0 3 0x4000082 kqread syz-fuzzer 47446 392135 77162 0 3 0x4000082 thrsleep syz-fuzzer 77162 197593 26319 0 3 0x10008a sigsusp ksh 26319 271305 62519 0 3 0x9a kqread sshd 62519 220468 1 0 3 0x88 kqread sshd 55113 448583 71110 74 3 0x1100092 bpf pflogd 71110 141766 1 0 3 0x80 netio pflogd 14913 315006 37125 73 3 0x1100090 kqread syslogd 37125 48841 1 0 3 0x100082 netio syslogd 52994 464528 1 0 3 0x100080 kqread resolvd 65269 301529 18227 77 3 0x100092 kqread dhcpleased 64506 187107 18227 77 3 0x100092 kqread dhcpleased 18227 26008 1 0 3 0x80 kqread dhcpleased 76916 79945 0 0 3 0x14200 bored smr 78871 318364 0 0 2 0x14200 zerothread 74137 132419 0 0 3 0x14200 aiodoned aiodoned 11753 387743 0 0 3 0x14200 syncer update 35065 397380 0 0 3 0x14200 cleaner cleaner 83374 496774 0 0 3 0x14200 reaper reaper 68807 521682 0 0 3 0x14200 pgdaemon pagedaemon 99063 79022 0 0 3 0x14200 bored viomb 85787 136863 0 0 3 0x40014200 acpi0 acpi0 67179 318120 0 0 7 0x40014200 idle1 51658 458753 0 0 3 0x14200 bored softnet 72569 147890 0 0 3 0x14200 bored softnet 16653 308699 0 0 3 0x14200 bored softnet 67963 495232 0 0 3 0x14200 bored softnet 87583 218849 0 0 3 0x14200 bored systqmp 43991 453572 0 0 3 0x14200 bored systq 3161 519004 0 0 3 0x40014200 bored softclock 8853 515306 0 0 3 0x40014200 idle0 1 353153 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 96475 (syz-executor.5) thread 0xffff8000245087e8 (245811) exclusive rrwlock inode r = 0 (0xfffffd8070f451a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #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 sys_chdir+0x72 change_dir sys/kern/vfs_syscalls.c:845 [inline] #7 sys_chdir+0x72 sys/kern/vfs_syscalls.c:791 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829e2ad0) #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 10216 6588K 7558K 78643K 64625 0 pcb 13 16K 18K 78643K 1498 0 rtable 239 15K 16K 78643K 3362 0 ifaddr 107 25K 25K 78643K 1011 0 sysctl 2 0K 0K 78643K 6 0 counters 56 35K 36K 78643K 358 0 ioctlops 0 0K 8K 78643K 4478 0 iov 0 0K 32K 78643K 1451 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1500 94K 94K 78643K 14922 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 127 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1318 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 93K 78643K 12082 0 sigio 0 0K 0K 78643K 188 0 proc 72 91K 128K 78643K 2574 0 subproc 104 6K 6K 78643K 819 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 421 0 in_multi 87 6K 6K 78643K 1023 0 ether_multi 1 0K 0K 78643K 57 0 mrt 1 0K 0K 78643K 64 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 187 837K 837K 78643K 187 0 exec 0 0K 2K 78643K 4160 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 492 1099K 1116K 78643K 67379 0 UVM aobj 43 4K 4K 78643K 49 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 448 0 NDP 14 0K 2K 78643K 321 0 temp 145 4746K 5002K 78643K 118961 0 kqueue 12 18K 28K 78643K 836 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 120 957 0 954 12 11 1 4 0 8 0 rtentry 112 1008 0 917 4 1 3 4 0 8 0 unpcb 136 11304 0 11289 92 91 1 9 0 8 0 syncache 296 45 0 45 13 13 0 1 0 8 0 tcpqe 32 10 0 10 6 6 0 1 0 8 0 tcpcb 736 4065 0 4056 151 147 4 16 0 8 3 arp 120 146 0 130 1 0 1 1 0 8 0 inpcb 312 10917 0 10910 138 134 4 16 0 8 3 nd6 48 226 0 205 1 0 1 1 0 8 0 pkpcb 40 61 0 61 7 7 0 1 0 8 0 kcovpl 48 63 0 55 1 0 1 1 0 8 0 ppxss 1248 56 0 56 13 13 0 1 0 8 0 pfstscr 40 15 0 15 2 2 0 1 0 8 0 pffrag 232 38 0 36 6 5 1 1 0 482 0 pffrnode 88 38 0 36 6 5 1 1 0 8 0 pffrent 40 215 0 213 7 6 1 1 0 8 0 pfosfp 40 1432 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1432 0 717 21 0 21 21 0 8 0 pfrktable 1344 42 0 26 3 1 2 2 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 65 0 63 1 0 1 1 0 8 0 pfstkey 112 81 0 79 2 1 1 2 0 8 0 pfstate 336 71 0 69 4 3 1 4 0 8 0 pfrule 1360 80 0 43 5 1 4 4 0 8 0 rttmr 64 23 0 23 9 9 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 4217 0 3819 48 22 26 30 0 8 0 art_table 32 4219 0 3820 4 0 4 4 0 8 0 art_node 16 938 0 858 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semapl 112 1316 0 1306 1 0 1 1 0 8 0 shmpl 112 46 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17377 0 15890 94 0 94 94 0 8 0 ffsino 272 17377 0 15890 100 0 100 100 0 8 0 nchpl 144 33242 0 31602 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 131537 0 131536 12 11 1 2 0 8 0 percpumem 16 191 0 151 1 0 1 1 0 8 0 vcpupl 2048 232 0 3 29 0 29 29 0 8 0 vmpool 560 264 0 35 17 0 17 17 0 8 0 pfiaddrpl 120 26 0 3 1 0 1 1 0 8 0 kstatmem 264 330 0 302 7 4 3 3 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 91370 0 91370 20 19 1 8 0 8 1 plimitpl 152 1452 0 1437 1 0 1 1 0 8 0 sigapl 424 12340 0 12274 12 4 8 8 0 8 0 futexpl 64 121207 0 121207 5 4 1 1 0 8 1 knotepl 120 757 0 0 17 1 16 17 0 8 0 kqueuepl 216 2791 0 2783 61 58 3 8 0 8 2 pipepl 336 3664 0 3638 101 95 6 13 0 8 3 fdescpl 496 12260 0 12232 5 0 5 5 0 8 0 filepl 152 93099 0 92864 148 134 14 23 0 8 4 lockfpl 104 16079 0 16077 30 28 2 5 0 8 1 lockfspl 48 7605 0 7603 5 4 1 3 0 8 0 sessionpl 144 81 0 64 1 0 1 1 0 8 0 pgrppl 48 170 0 153 1 0 1 1 0 8 0 ucredpl 96 11043 0 11027 1 0 1 1 0 8 0 zombiepl 144 12276 0 12274 5 4 1 1 0 8 0 processpl 1064 12340 0 12274 5 0 5 5 0 8 0 procpl 672 30422 0 30347 13 5 8 9 0 8 0 srpgc 96 74 0 74 16 16 0 1 0 8 0 sosppl 168 134 0 134 19 18 1 1 0 8 1 sockpl 480 23255 0 23230 478 470 8 34 0 8 4 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 423 0 0 26 1 25 26 0 8 0 mtagpl 96 2133 0 0 46 0 46 46 0 8 0 mbufpl 256 4399 0 0 257 0 257 257 0 8 0 bufpl 288 19578 0 13249 453 0 453 453 0 8 0 anonpl 24 2193454 0 2177583 231 117 114 136 0 186 0 amapchunkpl 152 198149 0 197460 79 44 35 42 0 158 1 amappl16 200 28781 0 28205 109 76 33 43 0 8 0 amappl15 192 2210 0 2209 3 2 1 1 0 8 0 amappl14 184 2108 0 2102 1 0 1 1 0 8 0 amappl13 176 2987 0 2982 1 0 1 1 0 8 0 amappl12 168 1536 0 1530 1 0 1 1 0 8 0 amappl11 160 930 0 907 3 1 2 2 0 8 0 amappl10 152 658 0 650 1 0 1 1 0 8 0 amappl9 144 850 0 846 1 0 1 1 0 8 0 amappl8 136 4184 0 4067 5 0 5 5 0 8 0 amappl7 128 2829 0 2812 1 0 1 1 0 8 0 amappl6 120 940 0 917 2 1 1 2 0 8 0 amappl5 112 8183 0 8168 1 0 1 1 0 8 0 amappl4 104 4509 0 4476 3 2 1 2 0 8 0 amappl3 96 37381 0 37338 2 0 2 2 0 8 0 amappl2 88 16074 0 16004 3 1 2 3 0 8 0 amappl1 80 286614 0 286038 27 12 15 20 0 8 0 amappl 88 65707 0 65466 9 2 7 7 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 48 0 6 1 0 1 1 0 8 0 uaddrrnd 24 12524 0 12267 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12524 0 12267 2 0 2 2 0 8 0 vmmpekpl 168 88468 0 88390 4 0 4 4 0 8 0 vmmpepl 168 1190464 0 1187546 325 159 166 181 0 357 17 vmsppl 368 12523 0 12267 25 1 24 24 0 8 0 rwobjpl 56 281834 0 274176 113 2 111 112 0 8 0 pdppl 4096 25055 0 24763 962 664 298 300 0 8 6 pvpl 32 4482913 0 4463298 426 234 192 253 0 265 2 pmappl 248 12523 0 12267 17 0 17 17 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2419 0 1082 39 0 39 39 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(fffffd806bffc6d0,ffff80002e39b648,ffff80002e39b678) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002e39b618) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 namei(ffff80002e39b618) at namei+0x36a sys/kern/vfs_lookup.c:245 sys_chdir(ffff8000245087e8,ffff80002e39b720,ffff80002e39b780) at sys_chdir+0x72 change_dir sys/kern/vfs_syscalls.c:845 [inline] sys_chdir(ffff8000245087e8,ffff80002e39b720,ffff80002e39b780) at sys_chdir+0x72 sys/kern/vfs_syscalls.c:791 syscall(ffff80002e39b7f0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e39b7f0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb840, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020cd8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020cd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020cd8ff0) 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020cd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5