uvm_fault(0xffffffff839d3278, 0xffff800029b12004, 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 *187815 48188 0 0 0x4000000 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806693d488,ffff80003c9a2fd0,ffff80003c9a3000) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c9a2fa0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c9a2fa0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dosymlinkat(ffff80003c99d4f0,200000000000,ffffff9c,200000000040) at dosymlinkat+0xef sys/kern/vfs_syscalls.c:1833 syscall(ffff80003c9a3170) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9a3170) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0286901f80, 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(0xffffffff839d3278, 0xffff800029b12004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806693d488,ffff80003c9a2fd0,ffff80003c9a3000) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c9a2fa0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80003c9a2fa0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dosymlinkat(ffff80003c99d4f0,200000000000,ffffff9c,200000000040) at dosymlinkat+0xef sys/kern/vfs_syscalls.c:1833 syscall(ffff80003c9a3170) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9a3170) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0286901f80, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c9a2d30 rbx 0 rdx 0xffff8000015e65c0 rcx 0xffffffff rax 0xffff80003c99d4f0 r8 0xffffffffffffffff r9 0xfffffd8007ffd680 r10 0x66c56bf0d7987d42 r11 0x77e7a9afb420d3d7 r12 0xfffffd807ac6f590 r13 0 r14 0 r15 0xffff800029b12000 rip 0xffffffff817d4623 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c9a2c40 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=187815 pid=48188 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c99c2c8,0xffffffff83ad7f88 process=0xffff8000ffff8498 user=0xffff80003c99e000, vmspace=0xfffffd806caac740 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 48188 13999 50226 0 2 0 syz-executor *48188 187815 50226 0 7 0x4000000 syz-executor 54278 101805 53297 0 2 0 syz-executor 54278 224153 53297 0 3 0x4000080 fifor syz-executor 54278 455903 53297 0 3 0x4000080 fsleep syz-executor 63424 116330 63124 0 2 0 syz-executor 63424 228829 63124 0 3 0x4000080 fsleep syz-executor 68712 197416 30552 0 2 0x100002 sh 5458 103323 76589 0 2 0 syz-executor 11896 391135 56943 0 2 0 syz-executor 11896 128465 56943 0 3 0x4000080 sbwait syz-executor 11896 343121 56943 0 3 0x4000080 fsleep syz-executor 30552 461200 60222 0 3 0x82 wait syz-executor 90105 523906 13607 0 3 0x80 nanoslp syz-executor 90105 296936 13607 0 3 0x4000080 fsleep syz-executor 90105 138110 13607 0 3 0x4000080 fsleep syz-executor 90105 405637 13607 0 3 0x4000080 netacc syz-executor 90105 77266 13607 0 3 0x4000080 fsleep syz-executor 90105 369720 13607 0 3 0x4000080 fsleep syz-executor 76589 436637 60222 0 2 0xc82 syz-executor 87512 429183 1 0 3 0x80 nanoslp init 20958 345878 0 0 3 0x14280 nfsidl nfsio 25486 354707 0 0 3 0x14280 nfsidl nfsio 65617 416413 0 0 3 0x14280 nfsidl nfsio 67370 217179 0 0 3 0x14280 nfsidl nfsio 40035 83995 0 0 3 0x14280 nfsidl nfsio 96975 448746 0 0 3 0x14280 nfsidl nfsio 1088 402982 0 0 3 0x14280 nfsidl nfsio 63755 239732 0 0 3 0x14280 nfsidl nfsio 197 457104 0 0 3 0x14280 nfsidl nfsio 82186 454421 0 0 3 0x14280 nfsidl nfsio 45346 183376 0 0 3 0x14280 nfsidl nfsio 34716 35655 0 0 3 0x14280 nfsidl nfsio 48697 284003 0 0 3 0x14280 nfsidl nfsio 67385 471085 0 0 3 0x14280 nfsidl nfsio 76795 215783 0 0 3 0x14280 nfsidl nfsio 30086 240422 0 0 3 0x14280 nfsidl nfsio 78712 315074 0 0 3 0x14280 nfsidl nfsio 39331 13543 0 0 3 0x14280 nfsidl nfsio 39356 458934 0 0 3 0x14280 nfsidl nfsio 55700 265200 0 0 3 0x14280 nfsidl nfsio 56943 95204 60222 0 2 0xc82 syz-executor 50226 17315 60222 0 3 0x82 nanoslp syz-executor 63124 376773 60222 0 2 0xc82 syz-executor 53297 319790 60222 0 3 0x82 nanoslp syz-executor 13607 260968 60222 0 3 0x82 nanoslp syz-executor 60222 56139 1 0 3 0x82 wait syz-executor 60187 137699 1 0 3 0x1000008a kqread sshd 9787 250515 92306 73 3 0x1100090 kqread syslogd 92306 90510 1 0 3 0x100082 sbwait syslogd 29081 468628 1 0 3 0x100080 kqread resolvd 10965 2812 98043 77 3 0x100092 kqread dhcpleased 49205 455333 98043 77 3 0x100092 kqread dhcpleased 98043 203363 1 0 3 0x80 kqread dhcpleased 81126 319956 0 0 3 0x14200 bored smr 68101 124350 0 0 2 0x14200 zerothread 169 421930 0 0 3 0x14200 aiodoned aiodoned 41469 258224 0 0 3 0x14200 syncer update 55455 184904 0 0 3 0x14200 cleaner cleaner 79683 208687 0 0 3 0x14200 reaper reaper 84410 484899 0 0 3 0x14200 pgdaemon pagedaemon 4024 460856 0 0 3 0x14200 bored viomb 27869 183224 0 0 3 0x40014200 acpi0 acpi0 85877 346586 0 0 3 0x14200 bored softnet0 65078 395913 0 0 3 0x14200 smrbar systqmp 41350 416691 0 0 3 0x14200 bored systq 42779 178813 0 0 3 0x40014200 tmoslp softclock 95025 515163 0 0 3 0x40014200 idle0 1 221695 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 11029 12100K 12366K 166960K 12517 0 pcb 17 12K 12K 166960K 60 0 rtable 232 8K 10K 166960K 660 0 pf 29 12K 19K 166960K 114 0 ifaddr 38 7K 8K 166960K 97 0 ifgroup 43 1K 2K 166960K 121 0 sysctl 3 1K 9K 166960K 7 0 counters 32 17K 18K 166960K 62 0 ioctlops 0 0K 4K 166960K 160 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1322 83K 83K 166960K 1669 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 21 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 480 0 sigio 0 0K 0K 166960K 4 0 proc 51 50K 124K 166960K 742 0 subproc 72 4K 4K 166960K 153 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 31 0 in_multi 88 6K 7K 166960K 200 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 488 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 198 131K 157K 166960K 5637 0 UVM aobj 7 2K 2K 166960K 10 0 pinsyscall 32 64K 96K 166960K 1798 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 66 0 temp 77 9116K 9180K 166960K 15346 0 kqueue 12 18K 26K 166960K 70 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 68 0 65 1 0 1 1 0 8 0 rtentry 136 208 0 107 4 0 4 4 0 8 0 unpcb 144 202 0 184 2 0 2 2 0 8 1 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpcb 736 81 0 78 4 0 4 4 0 8 3 arp 96 34 0 18 1 0 1 1 0 8 0 inpcb 328 282 0 275 4 0 4 4 0 8 2 nd6 112 51 0 30 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 17 0 9 1 0 1 1 0 8 0 ppxss 1072 18 0 18 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 9 0 9 1 0 1 1 0 8 1 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 6 1 0 1 1 0 8 0 pfstate 384 4 0 3 1 0 1 1 0 8 0 pfrule 1360 4 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 868 0 456 32 0 32 32 0 8 2 art_table 40 869 0 456 6 0 6 6 0 8 0 art_node 32 208 0 116 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 72 19 0 9 1 0 1 1 0 8 0 shmpl 112 7 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1984 0 506 93 0 93 93 0 8 0 ffsino 256 1984 0 506 93 0 93 93 0 8 0 nchpl 144 2495 0 767 65 0 65 65 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2300 0 0 128 0 128 128 0 8 0 namei 1024 8448 0 8446 2 0 2 2 0 8 1 pfiaddrpl 120 3 0 3 1 0 1 1 0 8 1 kstatmem 264 69 0 48 2 0 2 2 0 8 0 scxspl 216 16070 0 16070 8 0 8 8 1 8 8 plimitpl 152 128 0 114 1 0 1 1 0 8 0 sigapl 424 780 0 720 8 0 8 8 0 8 0 knotepl 120 11377 0 11335 10 0 10 10 0 8 8 kqueuepl 184 96 0 88 1 0 1 1 0 8 0 pipepl 304 173 0 146 3 0 3 3 0 8 0 fdescpl 448 746 0 720 5 0 5 5 0 8 1 filepl 120 3290 0 3089 8 0 8 8 0 8 0 lockfpl 104 82 0 80 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 144 173 0 166 1 0 1 1 0 8 0 pgrppl 48 191 0 176 1 0 1 1 0 8 0 ucredpl 104 335 0 324 1 0 1 1 0 8 0 zombiepl 144 722 0 720 1 0 1 1 0 8 0 processpl 1152 780 0 720 5 0 5 5 0 8 0 procpl 664 1162 0 1091 8 0 8 8 0 8 1 sockpl 552 565 0 537 5 0 5 5 0 8 2 mcl64k 65536 79 0 79 1 0 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 18 0 18 1 0 1 1 0 8 1 mcl4k 4096 2811 0 2755 15 0 15 15 0 8 7 mcl2k 2048 417 0 416 2 0 2 2 0 8 1 mtagpl 96 7 0 5 1 0 1 1 0 8 0 mbufpl 256 7862 0 7714 17 0 17 17 0 8 4 bufpl 280 6661 0 445 445 0 445 445 0 8 0 anonpl 24 118583 0 115276 68 0 68 68 0 186 30 amapchunkpl 152 16323 0 15899 28 0 28 28 0 158 10 amappl16 200 1953 0 1889 27 16 11 27 0 8 7 amappl15 192 21 0 20 1 0 1 1 0 8 0 amappl14 184 553 0 552 1 0 1 1 0 8 0 amappl13 176 130 0 123 1 0 1 1 0 8 0 amappl12 168 1044 0 1021 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 0 1 1 0 8 1 amappl10 152 57 0 47 1 0 1 1 0 8 0 amappl9 144 274 0 273 1 0 1 1 0 8 0 amappl8 136 144 0 142 1 0 1 1 0 8 0 amappl7 128 158 0 148 1 0 1 1 0 8 0 amappl6 120 237 0 235 1 0 1 1 0 8 0 amappl5 112 91 0 85 1 0 1 1 0 8 0 amappl4 104 329 0 315 1 0 1 1 0 8 0 amappl3 96 3220 0 3124 4 0 4 4 0 8 1 amappl2 88 595 0 552 2 0 2 2 0 8 0 amappl1 80 12351 0 11993 13 0 13 13 0 8 3 amappl 88 4758 0 4613 5 0 5 5 0 92 1 uvmvnodes 80 102 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 7 0 7 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 9 0 3 1 0 1 1 0 8 0 uaddrrnd 24 746 0 720 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 746 0 720 1 0 1 1 0 8 0 vmmpekpl 168 7902 0 7857 3 0 3 3 0 8 0 vmmpepl 168 56193 0 54754 102 0 102 102 0 357 35 vmsppl 368 745 0 720 4 0 4 4 0 8 1 rwobjpl 40 18636 0 17804 15 0 15 15 0 8 0 pdppl 4096 1498 0 1440 102 42 60 82 0 8 2 pvpl 32 325135 0 316305 143 0 143 143 0 265 59 pmappl 216 745 0 720 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 382 0 42 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb>