uvm_fault(0xffffffff83a13610, 0xffff800029922004, 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 *435586 20480 0 0x2 0 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffa80782342b0,ffff80003c941c58,ffff80003c941c88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c941c28) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c941c28) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c8fafb0,ffffff9c,701cb1b19160,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 syscall(ffff80003c941df0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c941df0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x701cb1b19150, 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(0xffffffff83a13610, 0xffff800029922004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffa80782342b0,ffff80003c941c58,ffff80003c941c88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c941c28) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c941c28) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c8fafb0,ffffff9c,701cb1b19160,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 syscall(ffff80003c941df0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c941df0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x701cb1b19150, count: -7 ddb> show registers rdi 0 rsi 0x2 rbp 0xffff80003c941a60 rbx 0 rdx 0 rcx 0xffffffff rax 0xffff80003c8fafb0 r8 0xffffffffffffffff r9 0xfffffa8007ffd6e8 r10 0xa770e1389b3c78fe r11 0x4ff8c54ed92f980d r12 0xfffffa8066ee4448 r13 0 r14 0 r15 0xffff800029922000 rip 0xffffffff81048f43 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c941970 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=435586 pid=20480 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c9142c0,0xffff80002a778d18 process=0xffff800045ffb618 user=0xffff80003c93c000, vmspace=0xfffffa806cfbd740 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=4, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 66630 338228 29488 0 2 0 syz-executor 66630 62346 29488 0 3 0x4000080 sbwait syz-executor 9463 418505 37401 0 2 0x40 syz-executor 37401 168010 10794 0 3 0x82 ppwait syz-executor *20480 435586 10794 0 7 0x2 syz-executor 67760 156045 1 0 3 0x100083 ttyin getty 29488 429165 10794 0 2 0xc82 syz-executor 10794 459029 75923 0 3 0x82 wait syz-executor 75923 23174 59834 0 3 0x10008a sigsusp ksh 59834 144968 50946 0 3 0x98 kqread sshd-session 50946 222578 81902 0 3 0x92 kqread sshd-session 81902 127039 1 0 3 0x88 kqread sshd 57292 452038 16069 73 2 0x1100090 syslogd 16069 189373 1 0 3 0x100082 sbwait syslogd 14379 287348 1 0 3 0x100080 kqread resolvd 84100 293249 17423 77 3 0x100092 kqread dhcpleased 37346 25706 17423 77 3 0x100092 kqread dhcpleased 17423 206736 1 0 3 0x80 kqread dhcpleased 63824 176380 0 0 3 0x14200 bored smr 29604 211074 0 0 2 0x14200 zerothread 2460 322436 0 0 3 0x14200 aiodoned aiodoned 40723 306440 0 0 3 0x14200 syncer update 76840 391026 0 0 3 0x14200 cleaner cleaner 44150 254930 0 0 3 0x14200 reaper reaper 68878 212976 0 0 3 0x14200 pgdaemon pagedaemon 20932 334519 0 0 3 0x14200 bored viomb 207 47094 0 0 3 0x40014200 acpi0 acpi0 47858 91085 0 0 2 0x14200 softnet0 13748 215597 0 0 3 0x14200 bored systqmp 70116 387042 0 0 3 0x14200 bored systq 50118 256159 0 0 3 0x40014200 tmoslp softclock 57144 334773 0 0 3 0x40014200 idle0 1 416745 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11063 12103K 16233K 166960K 13948 0 pcb 18 14K 16K 166960K 421 0 rtable 239 11K 12K 166960K 1108 0 pf 31 13K 73K 166960K 290 0 ifaddr 38 7K 8K 166960K 192 0 ifgroup 46 2K 2K 166960K 318 0 sysctl 4 1K 9K 166960K 13 0 counters 32 17K 18K 166960K 218 0 ioctlops 0 0K 4K 166960K 467 0 iov 1 12K 12K 166960K 29 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1299 82K 82K 166960K 3287 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 16 3K 3K 166960K 122 0 dirhash 12 2K 2K 166960K 159 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 12 41K 240K 166960K 2261 0 sigio 0 0K 0K 166960K 10 0 proc 60 59K 124K 166960K 781 0 subproc 72 4K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 126 0 in_multi 87 6K 7K 166960K 213 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 34 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 691 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 163 149K 169K 166960K 20664 0 UVM aobj 50 4K 4K 166960K 53 0 pinsyscall 33 66K 96K 166960K 3534 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 44 0 NDP 10 0K 2K 166960K 153 0 temp 76 9120K 9184K 166960K 58338 0 kqueue 13 20K 30K 166960K 522 0 SYN cache 2 16K 24K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 368 0 365 1 0 1 1 0 8 0 rtentry 136 281 0 184 4 0 4 4 0 8 0 unpcb 144 862 0 845 2 1 1 2 0 8 0 syncache 336 83 0 83 3 2 1 1 0 8 1 tcpcb 736 819 0 815 8 1 7 7 0 8 6 arp 96 45 0 28 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 4 0 2 1 0 1 1 0 8 0 inpcb 328 2335 0 2327 12 3 9 12 0 8 8 ip6q 72 80 0 77 2 1 1 1 0 8 0 ip6af 40 167 0 164 2 1 1 1 0 8 0 nd6 112 93 0 70 1 0 1 1 0 8 0 pkpcb 40 13 0 13 2 1 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1072 168 0 168 2 1 1 1 0 8 1 pppxif 1416 8 0 8 2 1 1 1 0 8 1 pfstscr 40 9 0 4 1 0 1 1 0 8 0 pfsrclim 320 5 0 5 3 2 1 1 0 8 1 pfstlim 224 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 10 0 4 1 0 1 1 0 8 0 pfstate 384 5 0 2 1 0 1 1 0 8 0 pfrule 1360 7 0 6 2 1 1 1 0 8 0 rttmr 136 4 0 4 3 2 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1375 0 959 36 1 35 35 0 8 4 art_table 40 1379 0 959 6 0 6 6 0 8 0 art_node 32 277 0 189 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 72 100 0 86 1 0 1 1 0 8 0 shmpl 112 50 0 3 2 0 2 2 0 8 0 dirhash 1024 115 0 98 3 0 3 3 0 8 0 dino2pl 256 5948 0 4482 92 0 92 92 0 8 0 ffsino 256 5948 0 4482 92 0 92 92 0 8 0 nchpl 144 8537 0 6817 64 0 64 64 0 8 0 rtmask 32 55 0 55 1 0 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 26759 0 26758 2 1 1 1 0 8 0 kstatmem 264 247 0 226 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 29656 0 29656 10 8 2 8 1 8 2 plimitpl 152 557 0 541 1 0 1 1 0 8 0 sigapl 424 2529 0 2492 7 1 6 6 0 8 0 knotepl 120 81509 0 81462 27 17 10 11 0 8 6 kqueuepl 184 537 0 528 1 0 1 1 0 8 0 pipepl 304 370 0 343 5 2 3 5 0 8 0 fdescpl 448 2515 0 2491 5 1 4 5 0 8 0 filepl 120 13032 0 12832 13 2 11 11 0 8 3 lockfpl 104 754 0 752 1 0 1 1 0 8 0 lockfspl 48 345 0 343 1 0 1 1 0 8 0 sessionpl 144 216 0 208 1 0 1 1 0 8 0 pgrppl 48 240 0 224 1 0 1 1 0 8 0 ucredpl 104 2608 0 2597 1 0 1 1 0 8 0 zombiepl 144 2497 0 2492 2 1 1 1 0 8 0 processpl 1152 2529 0 2492 4 0 4 4 0 8 0 procpl 664 5139 0 5101 7 1 6 6 0 8 1 sosppl 176 52 0 52 2 1 1 1 0 8 1 sockpl 552 3613 0 3585 14 3 11 12 0 8 8 mcl64k 65536 386 0 384 3 1 2 2 0 8 1 mcl16k 16384 182 0 182 3 2 1 1 0 8 1 mcl12k 12288 55 0 55 3 2 1 1 0 8 1 mcl9k128 9344 78 0 78 3 2 1 1 0 8 1 mcl8k 8192 409 0 409 2 1 1 1 0 8 1 mcl4k 4096 6283 0 6229 17 9 8 15 0 8 0 mcl2k2 2112 4 0 4 2 1 1 1 0 8 1 mcl2k 2048 1546 0 1545 5 3 2 3 0 8 1 mextrefs 64 1945 0 1944 2 1 1 1 0 8 0 mtagpl 96 13 0 13 2 1 1 1 0 8 1 mbufpl 256 30142 0 30040 32 6 26 26 0 8 6 bufpl 272 8989 0 2773 415 0 415 415 0 8 0 anonpl 24 299786 0 297031 78 21 57 57 0 187 24 amapchunkpl 152 70430 0 70149 53 21 32 33 0 158 13 amappl16 200 4772 0 4750 34 22 12 15 0 8 8 amappl15 192 17 0 16 1 0 1 1 0 8 0 amappl14 184 499 0 498 1 0 1 1 0 8 0 amappl13 176 140 0 129 1 0 1 1 0 8 0 amappl12 168 2781 0 2759 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 120 0 119 1 0 1 1 0 8 0 amappl7 128 175 0 164 1 0 1 1 0 8 0 amappl6 120 219 0 218 1 0 1 1 0 8 0 amappl5 112 94 0 86 1 0 1 1 0 8 0 amappl4 104 284 0 268 1 0 1 1 0 8 0 amappl3 96 14727 0 14661 4 0 4 4 0 8 0 amappl2 88 588 0 533 2 0 2 2 0 8 0 amappl1 80 19353 0 18829 13 1 12 13 0 8 0 amappl 88 19504 0 19403 5 0 5 5 0 92 0 uvmvnodes 80 130 0 0 3 0 3 3 0 8 0 dma32768 32768 65 0 65 1 0 1 1 0 8 1 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 20 0 20 2 2 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 52 0 3 1 0 1 1 0 8 0 uaddrrnd 24 2515 0 2491 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2515 0 2491 1 0 1 1 0 8 0 vmmpekpl 168 19179 0 19137 3 0 3 3 0 8 0 vmmpepl 168 155446 0 153968 102 10 92 92 0 357 13 vmsppl 368 2514 0 2491 4 1 3 4 0 8 0 rwobjpl 40 37526 0 36573 16 3 13 13 0 8 0 pdppl 4096 5036 0 4982 100 34 66 82 0 8 12 pvpl 32 1128004 0 1120531 169 34 135 135 0 265 40 pmappl 216 2514 0 2491 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 833 0 67 22 0 22 22 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(fffffa80782342b0,ffff80003c941c58,ffff80003c941c88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c941c28) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c941c28) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c8fafb0,ffffff9c,701cb1b19160,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 syscall(ffff80003c941df0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c941df0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x701cb1b19150, 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(fffffa80782342b0,ffff80003c941c58,ffff80003c941c88) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c941c28) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c941c28) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80003c8fafb0,ffffff9c,701cb1b19160,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 syscall(ffff80003c941df0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c941df0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x701cb1b19150, count: -7