uvm_fault(0xffffffff83aef998, 0xffff800019a32004, 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 *117475 94296 0 0x2 0 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff5006d341e98,ffff80002a8a9bf8,ffff80002a8a9c28) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8a9bc8) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a8a9bc8) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a736d00,ffffff9c,7b221ee82df0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 syscall(ffff80002a8a9d90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a9d90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b221ee82de0, 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(0xffffffff83aef998, 0xffff800019a32004, 0, 1) -> d ddb> show kasan No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff5006d341e98,ffff80002a8a9bf8,ffff80002a8a9c28) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8a9bc8) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a8a9bc8) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a736d00,ffffff9c,7b221ee82df0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 syscall(ffff80002a8a9d90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a9d90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b221ee82de0, count: -7 ddb> show registers rdi 0 rsi 0x2 rbp 0xffff80002a8a9a00 rbx 0 rdx 0 rcx 0xffffffff rax 0xffff80002a736d00 r8 0xffffffffffffffff r9 0xfffff50007ffd000 r10 0x1f89e02959e41420 r11 0xc9ec6dd08575f428 r12 0xfffff5006d3ac668 r13 0 r14 0 r15 0xffff800019a32000 rip 0xffffffff819b7393 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a8a9910 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=117475 pid=94296 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=0xffff80002a736a68,0xffff80002a737ca0 process=0xffff80002a79fa90 user=0xffff80002a8a4000, vmspace=0xfffff50073b80458 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 27192 294512 1 0 3 0x100083 ttyin getty 71128 66440 0 0 3 0x14200 acct acct 10201 363107 0 0 3 0x14280 nfsidl nfsio 74323 511399 0 0 3 0x14280 nfsidl nfsio 41902 49648 0 0 3 0x14280 nfsidl nfsio 51336 141414 0 0 3 0x14280 nfsidl nfsio 82281 3528 0 0 3 0x14280 nfsidl nfsio 2459 309374 0 0 3 0x14280 nfsidl nfsio 74441 206881 0 0 3 0x14280 nfsidl nfsio 20868 22138 0 0 3 0x14280 nfsidl nfsio 31135 454086 0 0 3 0x14280 nfsidl nfsio 58298 271468 0 0 3 0x14280 nfsidl nfsio 20363 499220 0 0 3 0x14280 nfsidl nfsio 98160 363498 0 0 3 0x14280 nfsidl nfsio 8052 61027 0 0 3 0x14280 nfsidl nfsio 87816 355282 0 0 3 0x14280 nfsidl nfsio 73350 146760 0 0 3 0x14280 nfsidl nfsio 8003 243879 0 0 3 0x14280 nfsidl nfsio 80545 140959 0 0 3 0x14280 nfsidl nfsio 90301 444761 0 0 3 0x14280 nfsidl nfsio 39993 142248 0 0 3 0x14280 nfsidl nfsio 49423 245465 0 0 3 0x14280 nfsidl nfsio *94296 117475 92556 0 7 0x2 syz-executor 92556 170264 1 0 3 0x82 wait syz-executor 52296 251490 0 0 3 0x14200 bored smr 57960 192604 0 0 2 0x14200 zerothread 76868 398098 0 0 3 0x14200 aiodoned aiodoned 71932 122723 0 0 3 0x14200 syncer update 86445 419983 0 0 3 0x14200 cleaner cleaner 97573 233195 0 0 3 0x14200 reaper reaper 84040 85715 0 0 3 0x14200 pgdaemon pagedaemon 60898 194663 0 0 3 0x14200 bored viomb 71518 492508 0 0 3 0x40014200 acpi0 acpi0 81034 440188 0 0 3 0x14200 bored softnet0 4737 287214 0 0 3 0x14200 bored systqmp 48502 133385 0 0 3 0x14200 bored systq 45793 455026 0 0 3 0x40014200 tmoslp softclock 91687 407592 0 0 3 0x40014200 idle0 1 50363 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 11025 12098K 12428K 166960K 12400 0 pcb 17 12K 12K 166960K 69 0 rtable 237 9K 9K 166960K 419 0 pf 33 13K 19K 166960K 58 0 ifaddr 38 6K 7K 166960K 54 0 ifgroup 46 2K 2K 166960K 67 0 sysctl 4 1K 9K 166960K 10 0 counters 32 17K 18K 166960K 44 0 ioctlops 0 0K 4K 166960K 87 0 iov 0 0K 16K 166960K 20 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1609 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 9 33K 97K 166960K 451 0 sigio 0 0K 0K 166960K 2 0 proc 21 25K 124K 166960K 533 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 41 0 in_multi 88 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 397 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 75 80K 175K 166960K 5758 0 UVM aobj 80 5K 5K 166960K 83 0 pinsyscall 12 24K 96K 166960K 1555 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 10 0K 2K 166960K 34 0 temp 74 9120K 9168K 166960K 17555 0 kqueue 1 2K 31K 166960K 91 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 58 0 58 1 0 1 1 0 8 1 rtentry 136 120 0 18 4 0 4 4 0 8 0 unpcb 144 190 0 190 1 0 1 1 0 8 1 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpcb 736 225 0 224 7 0 7 7 0 8 6 arp 96 19 0 2 1 0 1 1 0 8 0 inpcb 328 496 0 494 9 0 9 9 0 8 8 nd6 112 25 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 10 0 10 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 8 0 4 1 0 1 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 4 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 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 0 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 4 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 2 0 2 1 0 1 1 0 8 1 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 525 0 82 32 0 32 32 0 8 2 art_table 40 526 0 82 6 0 6 6 0 8 1 art_node 32 119 0 26 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 72 7 0 1 1 0 1 1 0 8 0 shmpl 112 80 0 3 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2162 0 701 93 0 93 93 0 8 0 ffsino 256 2164 0 703 93 0 93 93 0 8 0 nchpl 144 2810 0 1119 64 0 64 64 0 8 0 vnodes 216 2379 0 0 133 0 133 133 0 8 0 namei 1024 8706 0 8705 2 0 2 2 0 8 1 kstatmem 264 37 0 16 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 0 1 1 0 8 1 scxspl 216 16011 0 16011 8 0 8 8 1 8 8 plimitpl 152 94 0 84 1 0 1 1 0 8 0 sigapl 424 768 0 722 8 0 8 8 0 8 0 knotepl 120 16065 0 16048 15 5 10 15 0 8 8 kqueuepl 184 120 0 119 1 0 1 1 0 8 0 pipepl 304 142 0 115 3 0 3 3 0 8 0 fdescpl 448 734 0 722 5 0 5 5 0 8 1 filepl 120 3592 0 3448 10 0 10 10 0 8 3 lockfpl 104 130 0 130 1 0 1 1 0 8 1 lockfspl 48 57 0 57 1 0 1 1 0 8 1 sessionpl 144 40 0 37 1 0 1 1 0 8 0 pgrppl 48 48 0 37 1 0 1 1 0 8 0 ucredpl 104 418 0 415 1 0 1 1 0 8 0 zombiepl 144 729 0 722 1 0 1 1 0 8 0 processpl 1152 768 0 722 5 0 5 5 0 8 0 procpl 664 1275 0 1229 7 0 7 7 0 8 1 sockpl 552 757 0 755 10 1 9 10 0 8 8 mcl64k 65536 49 0 49 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 1 0 1 1 0 8 1 mcl4k 4096 2973 0 2925 14 0 14 14 0 8 7 mcl2k 2048 378 0 376 3 0 3 3 0 8 2 mextrefs 64 181 0 181 1 0 1 1 0 8 1 mtagpl 96 6 0 6 1 0 1 1 0 8 1 mbufpl 256 7876 0 7816 19 2 17 19 0 8 8 bufpl 272 7536 0 1320 415 0 415 415 0 8 0 anonpl 24 136349 0 135270 57 0 57 57 0 187 31 amapchunkpl 152 19350 0 19191 50 0 50 50 0 158 36 amappl16 200 2537 0 2520 22 9 13 19 0 8 8 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 444 0 444 1 0 1 1 0 8 1 amappl13 176 115 0 114 1 0 1 1 0 8 0 amappl12 168 989 0 978 2 0 2 2 0 8 0 amappl11 160 19 0 19 1 0 1 1 0 8 1 amappl10 152 59 0 59 1 0 1 1 0 8 1 amappl9 144 273 0 273 1 0 1 1 0 8 1 amappl8 136 107 0 106 1 0 1 1 0 8 0 amappl7 128 188 0 186 1 0 1 1 0 8 0 amappl6 120 149 0 148 1 0 1 1 0 8 0 amappl5 112 90 0 90 1 0 1 1 0 8 1 amappl4 104 279 0 275 1 0 1 1 0 8 0 amappl3 96 3513 0 3478 4 0 4 4 0 8 1 amappl2 88 527 0 516 2 0 2 2 0 8 0 amappl1 80 11288 0 11198 13 0 13 13 0 8 5 amappl 88 4957 0 4896 4 0 4 4 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 82 0 3 2 0 2 2 0 8 0 uaddrrnd 24 734 0 722 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 734 0 722 1 0 1 1 0 8 0 vmmpekpl 168 7531 0 7484 3 0 3 3 0 8 0 vmmpepl 168 55104 0 54637 90 0 90 90 0 357 45 vmsppl 368 733 0 722 4 0 4 4 0 8 1 rwobjpl 40 18069 0 17630 13 0 13 13 0 8 1 pdppl 4096 1474 0 1444 96 50 46 82 0 8 16 pvpl 32 344930 0 342508 112 0 112 112 0 265 45 pmappl 216 733 0 722 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 797 0 52 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(fffff5006d341e98,ffff80002a8a9bf8,ffff80002a8a9c28) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a8a9bc8) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a8a9bc8) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dounlinkat(ffff80002a736d00,ffffff9c,7b221ee82df0,8) at dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 syscall(ffff80002a8a9d90) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a9d90) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b221ee82de0, count: -7 ddb>