uvm_fault(0xffffffff82e4fbf8, 0xffff8000205d2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND * 60687 20862 0 0 0x4000000 0 syz-executor.3 ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8074777010,ffff800037821258,ffff800037821288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037821228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff800037821228) at namei+0x55a sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a67d008,ffffff9c,20000040,3,20000280) at dorenameat+0x7f sys/kern/vfs_syscalls.c:2946 syscall(ffff800037821420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc65493fd520, 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(0xffffffff82e4fbf8, 0xffff8000205d2004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8074777010,ffff800037821258,ffff800037821288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037821228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff800037821228) at namei+0x55a sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a67d008,ffffff9c,20000040,3,20000280) at dorenameat+0x7f sys/kern/vfs_syscalls.c:2946 syscall(ffff800037821420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc65493fd520, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff800037820fb0 rbx 0 rdx 0 rcx 0 rax 0xfffffd8077b96120 r8 0xffffffffffffffff r9 0xfffffd807f7d7888 r10 0xfeaa056f808997b0 r11 0x5145270ee88d6a63 r12 0 r13 0xffffffff r14 0 r15 0xffff8000205d2000 rip 0xffffffff81653840 ufs_lookup+0x4d0 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800037820eb0 ss 0x10 ufs_lookup+0x4d0: movzwl 0x4(%r15,%r12,1),%ebx ddb> show proc PROC (syz-executor.3) tid=60687 pid=20862 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a67c2c0,0xffff80002a67c028 process=0xffff8000ffff8c98 user=0xffff80003781c000, vmspace=0xfffffd80790f2058 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76160 110030 91997 0 2 0 syz-executor.0 55159 304924 94529 0 4 0x82000 syz-executor.4 55159 517880 94529 0 2 0x4082000 syz-executor.4 55159 220387 94529 0 3 0x4082000 inode syz-executor.4 55159 299057 94529 0 3 0x4002000 suspend syz-executor.4 23047 309201 40228 0 2 0 syz-executor.5 23047 248966 40228 0 3 0x4000080 fsleep syz-executor.5 12936 377549 74886 0 3 0x3800 suspend syz-executor.6 12936 231603 74886 0 2 0x4081800 syz-executor.6 20862 417586 51821 0 2 0 syz-executor.3 20862 441966 51821 0 2 0x4000000 syz-executor.3 *20862 60687 51821 0 7 0x4000000 syz-executor.3 73924 183935 14727 0 3 0x80 nanoslp syz-executor.2 73924 518261 14727 0 2 0x4000080 syz-executor.2 73924 312704 14727 0 3 0x4000080 fsleep syz-executor.2 74886 13625 92472 0 3 0x82 nanoslp syz-executor.6 51821 178699 92472 0 3 0x82 nanoslp syz-executor.3 40228 268872 92472 0 3 0x82 nanoslp syz-executor.5 11938 54356 92472 0 2 0x2 syz-executor.7 94529 374424 92472 0 2 0x482 syz-executor.4 84787 474978 0 0 3 0x14280 nfsidl nfsio 20264 416272 0 0 3 0x14280 nfsidl nfsio 33845 378572 0 0 3 0x14280 nfsidl nfsio 91198 32509 0 0 3 0x14280 nfsidl nfsio 89222 154445 0 0 3 0x14280 nfsidl nfsio 66570 389660 0 0 3 0x14280 nfsidl nfsio 14505 302302 0 0 3 0x14280 nfsidl nfsio 25279 295061 0 0 3 0x14280 nfsidl nfsio 4047 37917 0 0 3 0x14280 nfsidl nfsio 87940 475465 0 0 3 0x14280 nfsidl nfsio 85194 135170 0 0 3 0x14280 nfsidl nfsio 73578 11145 0 0 3 0x14280 nfsidl nfsio 84382 61871 0 0 3 0x14280 nfsidl nfsio 4394 58608 0 0 3 0x14280 nfsidl nfsio 16970 456696 0 0 3 0x14280 nfsidl nfsio 42687 64283 0 0 3 0x14280 nfsidl nfsio 40944 450898 0 0 3 0x14280 nfsidl nfsio 63955 505008 0 0 3 0x14280 nfsidl nfsio 72397 209113 0 0 3 0x14280 nfsidl nfsio 86753 72409 0 0 3 0x14280 nfsidl nfsio 14727 65692 92472 0 2 0x482 syz-executor.2 26798 88987 0 0 3 0x14200 acct acct 91997 316104 92472 0 3 0x82 nanoslp syz-executor.0 63045 78114 92472 0 2 0x2 syz-executor.1 54273 4145 1 0 3 0x100083 ttyin getty 25981 180761 0 0 3 0x14200 bored sosplice 92472 120717 53754 0 3 0x2000082 wait syz-fuzzer 92472 432502 53754 0 3 0x6000082 nanoslp syz-fuzzer 92472 18518 53754 0 3 0x6000082 kqread syz-fuzzer 92472 188690 53754 0 3 0x6000082 thrsleep syz-fuzzer 92472 282462 53754 0 3 0x6000082 thrsleep syz-fuzzer 92472 167275 53754 0 3 0x6000082 thrsleep syz-fuzzer 92472 231624 53754 0 3 0x6000082 wait syz-fuzzer 92472 156143 53754 0 3 0x6000082 thrsleep syz-fuzzer 92472 185128 53754 0 3 0x6000082 wait syz-fuzzer 92472 269231 53754 0 3 0x6000082 thrsleep syz-fuzzer 92472 350751 53754 0 3 0x6000082 wait syz-fuzzer 92472 86333 53754 0 3 0x6000082 wait syz-fuzzer 92472 180150 53754 0 3 0x6000082 wait syz-fuzzer 92472 486895 53754 0 3 0x6000082 wait syz-fuzzer 92472 35642 53754 0 3 0x6000082 wait syz-fuzzer 53754 150960 38599 0 3 0x10008a sigsusp ksh 38599 153809 60092 0 3 0x9a kqread sshd 60092 29859 1 0 3 0x88 kqread sshd 30191 380273 45673 73 2 0x1100010 syslogd 45673 203957 1 0 3 0x100082 netio syslogd 56189 341944 1 0 3 0x100080 kqread resolvd 17050 349786 82618 77 3 0x100092 kqread dhcpleased 43187 206233 82618 77 3 0x100092 kqread dhcpleased 82618 354369 1 0 3 0x80 kqread dhcpleased 44323 465671 0 0 3 0x14200 bored smr 9775 50683 0 0 2 0x14200 zerothread 10932 316063 0 0 3 0x14200 aiodoned aiodoned 13571 136992 0 0 3 0x14200 syncer update 74396 130066 0 0 3 0x14200 cleaner cleaner 88694 24466 0 0 3 0x14200 reaper reaper 49240 209975 0 0 3 0x14200 pgdaemon pagedaemon 25995 464620 0 0 3 0x14200 bored viomb 50998 139008 0 0 3 0x40014200 acpi0 acpi0 4428 28485 0 0 3 0x14200 bored softnet3 18412 27669 0 0 3 0x14200 bored softnet2 92872 224210 0 0 3 0x14200 bored softnet1 39091 119686 0 0 3 0x14200 bored softnet0 33134 271722 0 0 3 0x14200 bored systqmp 41053 109505 0 0 3 0x14200 bored systq 34552 463811 0 0 3 0x40014200 tmoslp softclock 76988 358528 0 0 3 0x40014200 idle0 1 491369 0 0 3 0x80082 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 10216 6432K 7471K 166960K 80941 0 pcb 16 24K 26K 166960K 2033 0 rtable 206 14K 17K 166960K 7965 0 pf 36 10K 10K 166960K 992 0 ifaddr 44 15K 16K 166960K 1154 0 ifgroup 63 2K 2K 166960K 1725 0 sysctl 4 1K 1K 166960K 10 0 counters 33 17K 18K 166960K 507 0 ioctlops 0 0K 2K 166960K 1775 0 iov 0 0K 34K 166960K 3200 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1536 96K 96K 166960K 22880 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 369 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 837 0 dirhash 12 2K 2K 166960K 135 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 73K 166960K 30632 0 sigio 0 0K 0K 166960K 1285 0 proc 61 59K 83K 166960K 6246 0 subproc 104 6K 7K 166960K 2434 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 2401 0 in_multi 73 5K 7K 166960K 2756 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 5568 0 pfkey data 0 0K 0K 166960K 88 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 712 2113K 2114K 166960K 273875 0 UVM aobj 131 4K 4K 166960K 144 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 1105 0 NDP 14 0K 2K 166960K 935 0 temp 74 6764K 7400K 166960K 283884 0 kqueue 12 18K 26K 166960K 1964 0 SYN cache 2 104K 112K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 2018 0 2015 13 8 5 5 0 8 4 rtentry 112 2604 0 2514 7 3 4 4 0 8 0 unpcb 144 20557 0 20542 41 33 8 10 0 8 7 syncache 336 278 0 278 7 6 1 1 0 8 1 sackhl 24 5 1 5 5 4 1 1 0 8 1 tcpqe 32 463 0 463 7 6 1 1 0 8 1 tcpcb 808 9188 0 9165 72 59 13 15 0 8 10 arp 88 429 0 414 1 0 1 1 0 8 0 ipq 40 35 0 35 3 2 1 1 0 8 1 ipqe 40 272 0 272 3 2 1 1 0 8 1 inpcb 360 22843 0 22816 114 102 12 19 0 8 9 nd6 104 662 0 644 1 0 1 1 0 8 0 pkpcb 40 349 0 349 7 6 1 1 0 8 1 kcovpl 48 187 0 179 1 0 1 1 0 8 0 ppxss 1072 121 0 121 7 6 1 1 0 8 1 art_heap8 4096 3 0 2 3 2 1 2 0 8 0 art_heap4 256 10712 0 10333 95 65 30 31 0 8 1 art_table 32 10715 0 10335 4 0 4 4 0 8 0 art_node 16 2563 0 2481 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 6 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 829 0 819 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 99 0 82 3 0 3 3 0 8 0 dino2pl 256 40918 0 39340 99 0 99 99 0 8 0 ffsino 240 40918 0 39340 93 0 93 93 0 8 0 nchpl 144 80112 0 78476 63 0 63 63 0 8 0 uvmvnodes 80 9641 0 0 197 0 197 197 0 8 0 vnodes 216 9641 0 0 536 0 536 536 0 8 0 namei 1024 281204 0 281200 9 7 2 3 0 8 1 vcpupl 2048 415 0 0 52 0 52 52 0 8 0 vmpool 664 484 0 69 35 0 35 35 0 8 0 kstatmem 264 976 0 948 4 1 3 3 0 8 0 scxspl 216 264835 0 264835 18 14 4 8 1 8 4 plimitpl 152 3519 0 3503 1 0 1 1 0 8 0 sigapl 424 31006 0 30941 8 0 8 8 0 8 0 futexpl 64 266652 0 266650 1 0 1 1 0 8 0 knotepl 120 258434 0 258352 49 38 11 16 0 8 7 kqueuepl 184 4140 0 4132 13 9 4 4 0 8 3 pipepl 288 5319 0 5291 39 30 9 11 0 8 6 fdescpl 432 30525 0 30498 4 0 4 4 0 8 0 filepl 120 175062 0 174754 63 47 16 18 0 8 6 lockfpl 104 8113 0 8111 9 7 2 4 0 8 1 lockfspl 48 3108 0 3106 2 1 1 2 0 8 0 sessionpl 144 204 0 188 1 0 1 1 0 8 0 pgrppl 48 951 0 935 1 0 1 1 0 8 0 ucredpl 104 25922 0 25905 1 0 1 1 0 8 0 zombiepl 144 30941 0 30941 4 3 1 1 0 8 1 processpl 1072 31006 0 30941 5 0 5 5 0 8 0 procpl 680 73311 0 73223 16 6 10 10 0 8 2 sosppl 168 431 0 426 4 3 1 1 0 8 0 sockpl 488 45930 0 45885 595 577 18 35 0 8 10 mcl64k 65536 1005 0 1005 7 6 1 1 0 8 1 mcl16k 16384 640 0 640 7 6 1 1 0 8 1 mcl12k 12288 1148 0 1148 7 6 1 1 0 8 1 mcl9k 9216 499 0 499 7 6 1 1 0 8 1 mcl8k 8192 1917 0 1917 7 5 2 2 0 8 2 mcl4k 4096 3102 0 3102 12 10 2 4 0 8 2 mcl2k2 2112 176 0 176 7 6 1 1 0 8 1 mcl2k 2048 136466 0 136416 75 62 13 32 0 8 5 mtagpl 96 5076 0 4606 41 29 12 16 0 8 0 mbufpl 256 472516 0 471906 1044 1002 42 478 0 8 0 bufpl 280 59143 0 49498 690 0 690 690 0 8 0 anonpl 24 2827986 0 2813117 258 139 119 166 0 188 7 amapchunkpl 152 885834 0 884894 131 77 54 66 0 158 14 amappl16 200 54535 0 54017 134 96 38 43 0 8 8 amappl15 192 205 0 204 1 0 1 1 0 8 0 amappl14 184 694 0 680 2 1 1 2 0 8 0 amappl13 176 26 0 26 4 3 1 1 0 8 1 amappl12 168 33812 0 33780 2 0 2 2 0 8 0 amappl11 160 75 0 64 1 0 1 1 0 8 0 amappl10 152 205 0 193 1 0 1 1 0 8 0 amappl9 144 299 0 298 1 0 1 1 0 8 0 amappl8 136 1300 0 1170 5 0 5 5 0 8 0 amappl7 128 620 0 593 2 0 2 2 0 8 0 amappl6 120 2981 0 2965 1 0 1 1 0 8 0 amappl5 112 588 0 580 1 0 1 1 0 8 0 amappl4 104 1882 0 1854 2 1 1 2 0 8 0 amappl3 96 169481 0 169369 4 0 4 4 0 8 0 amappl2 88 32641 0 32567 3 1 2 3 0 8 0 amappl1 80 129130 0 128626 21 9 12 21 0 8 0 amappl 88 271395 0 271023 9 0 9 9 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 31009 0 30567 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 31009 0 30567 3 0 3 3 0 8 0 vmmpekpl 168 188916 0 188795 6 0 6 6 0 8 0 vmmpepl 168 1841819 0 1838967 242 85 157 157 0 357 11 vmsppl 352 31008 0 30567 42 1 41 41 0 8 0 rwobjpl 24 410344 0 398798 71 0 71 71 0 8 0 pdppl 4096 62024 0 61549 2169 1690 479 479 0 8 4 pvpl 32 8378977 0 8358286 564 326 238 343 0 265 42 pmappl 216 31008 0 30567 25 0 25 25 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3812 0 2958 34 9 25 29 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8074777010,ffff800037821258,ffff800037821288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037821228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff800037821228) at namei+0x55a sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a67d008,ffffff9c,20000040,3,20000280) at dorenameat+0x7f sys/kern/vfs_syscalls.c:2946 syscall(ffff800037821420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc65493fd520, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4d0 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8074777010,ffff800037821258,ffff800037821288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff800037821228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff800037821228) at namei+0x55a sys/kern/vfs_lookup.c:250 dorenameat(ffff80002a67d008,ffffff9c,20000040,3,20000280) at dorenameat+0x7f sys/kern/vfs_syscalls.c:2946 syscall(ffff800037821420) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc65493fd520, count: -7