uvm_fault(0xfffffd8069084d80, 0x18, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ufs_symlink+0xa2: movq 0x18(%rbx),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *177924 64706 0 0x8000000 0x4000000 0 syz-executor.4 ufs_symlink(ffff8000329b3b10) at ufs_symlink+0xa2 sys/ufs/ufs/ufs_vnops.c:1304 VOP_SYMLINK(fffffd80776197d8,ffff8000329b3c90,ffff8000329b3cc0,ffff8000329b3bc0,ffff80002a676000) at VOP_SYMLINK+0xd7 sys/kern/vfs_vops.c:432 dosymlinkat(ffff80002a678cf0,20000040,9,20000340) at dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1810 syscall(ffff8000329b3e40) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd5504fb090, count: 10 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(0xfffffd8069084d80, 0x18, 0, 1) -> e ddb> trace ufs_symlink(ffff8000329b3b10) at ufs_symlink+0xa2 sys/ufs/ufs/ufs_vnops.c:1304 VOP_SYMLINK(fffffd80776197d8,ffff8000329b3c90,ffff8000329b3cc0,ffff8000329b3bc0,ffff80002a676000) at VOP_SYMLINK+0xd7 sys/kern/vfs_vops.c:432 dosymlinkat(ffff80002a678cf0,20000040,9,20000340) at dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1810 syscall(ffff8000329b3e40) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd5504fb090, count: -5 ddb> show registers rdi 0xffff80002a676000 rsi 0xd2a rbp 0xffff8000329b3b00 rbx 0 rdx 0x7 rcx 0xffcf9a939699d0d1 rax 0x7 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf180eaa840c72b8f r11 0x565d5687a3f0aa30 r12 0x7 r13 0xfffffd8077619898 r14 0xffff8000329b3c90 r15 0xffff8000329b3b10 rip 0xffffffff81838802 ufs_symlink+0xa2 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000329b3ab0 ss 0 ufs_symlink+0xa2: movq 0x18(%rbx),%r14 ddb> show proc PROC (syz-executor.4) tid=177924 pid=64706 tcnt=3 stat=onproc flags process=8000000 proc=4000000 runpri=17, usrpri=85, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002d5242c0,0xffff80002a679740 process=0xffff800035c8f2c8 user=0xffff8000329ae000, vmspace=0xfffffd8069084d80 estcpu=35, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 67148 160599 50272 0 2 0x8000000 syz-executor.3 67148 229379 50272 0 3 0xc000080 ttyout syz-executor.3 62371 94373 44939 0 2 0x8000000 syz-executor.6 62371 220562 44939 0 3 0xc000080 fsleep syz-executor.6 1039 36826 31046 0 2 0x8000000 syz-executor.0 1039 169439 31046 0 2 0xc000000 syz-executor.0 75811 516679 46640 0 3 0x8000080 nanoslp syz-executor.5 75811 484668 46640 0 3 0xc000080 kqpoll syz-executor.5 75811 379320 46640 0 3 0xc000080 fsleep syz-executor.5 64706 520815 27069 0 2 0x8000000 syz-executor.4 *64706 177924 27069 0 7 0xc000000 syz-executor.4 64706 18520 27069 0 3 0xc000080 fsleep syz-executor.4 27069 281291 52867 0 3 0x8000082 nanoslp syz-executor.4 46640 288579 52867 0 3 0x8000082 nanoslp syz-executor.5 99857 399748 52867 0 2 0x8000482 syz-executor.2 50272 399437 52867 0 3 0x8000082 nanoslp syz-executor.3 31046 109664 52867 0 3 0x8000082 nanoslp syz-executor.0 81787 326285 52867 0 2 0x8000482 syz-executor.7 44939 107949 52867 0 3 0x8000082 nanoslp syz-executor.6 68371 387417 0 0 3 0x14200 acct acct 47923 340179 24788 0 3 0x18100082 netio ndp 24788 75828 1 0 3 0x810008a sigsusp sh 27665 196372 0 0 3 0x14280 nfsidl nfsio 92475 43279 0 0 3 0x14280 nfsidl nfsio 73007 371201 0 0 3 0x14280 nfsidl nfsio 9766 308868 0 0 3 0x14280 nfsidl nfsio 93523 447553 0 0 3 0x14280 nfsidl nfsio 92498 140372 0 0 3 0x14280 nfsidl nfsio 51042 426192 0 0 3 0x14280 nfsidl nfsio 56011 367798 0 0 3 0x14280 nfsidl nfsio 91931 468018 0 0 3 0x14280 nfsidl nfsio 37907 447349 0 0 3 0x14280 nfsidl nfsio 63203 205328 0 0 3 0x14280 nfsidl nfsio 7121 62287 0 0 3 0x14280 nfsidl nfsio 26204 279063 0 0 3 0x14280 nfsidl nfsio 45100 235472 0 0 3 0x14280 nfsidl nfsio 33986 169607 0 0 3 0x14280 nfsidl nfsio 8798 305580 0 0 3 0x14280 nfsidl nfsio 45339 232146 0 0 3 0x14280 nfsidl nfsio 50450 260711 0 0 3 0x14280 nfsidl nfsio 66711 187880 0 0 3 0x14280 nfsidl nfsio 32912 364412 0 0 3 0x14280 nfsidl nfsio 4192 102918 1 0 3 0x18100083 ttyin getty 13830 105392 0 0 3 0x14200 bored sosplice 52867 371629 7000 0 3 0x1a000082 thrsleep syz-fuzzer 52867 401809 7000 0 3 0x1e000082 thrsleep syz-fuzzer 52867 421417 7000 0 3 0x1e000082 thrsleep syz-fuzzer 52867 477202 7000 0 3 0x1e000082 wait syz-fuzzer 52867 15697 7000 0 3 0x1e000082 wait syz-fuzzer 52867 37067 7000 0 3 0x1e000082 kqread syz-fuzzer 52867 31621 7000 0 3 0x1e000082 wait syz-fuzzer 52867 465040 7000 0 3 0x1e000082 wait syz-fuzzer 52867 183890 7000 0 3 0x1e000082 wait syz-fuzzer 52867 189130 7000 0 3 0x1e000082 wait syz-fuzzer 52867 105110 7000 0 3 0x1e000082 thrsleep syz-fuzzer 52867 83419 7000 0 3 0x1e000082 thrsleep syz-fuzzer 52867 38266 7000 0 3 0x1e000082 wait syz-fuzzer 52867 288358 7000 0 3 0x1e000082 wait syz-fuzzer 7000 137107 65870 0 3 0x810008a sigsusp ksh 65870 137858 25305 0 3 0x1800009a kqread sshd 25305 323096 1 0 3 0x18000088 kqread sshd 49534 341857 4968 73 2 0x19100010 syslogd 4968 315422 1 0 3 0x18100082 sbwait syslogd 23588 394402 1 0 3 0x18100080 kqread resolvd 60788 264494 3038 77 3 0x18100092 kqread dhcpleased 33429 65804 3038 77 3 0x18100092 kqread dhcpleased 3038 434465 1 0 3 0x18000080 kqread dhcpleased 9605 292443 0 0 3 0x14200 bored smr 41986 202323 0 0 2 0x14200 zerothread 19676 250367 0 0 3 0x14200 aiodoned aiodoned 50335 506059 0 0 3 0x14200 syncer update 65980 173001 0 0 3 0x14200 cleaner cleaner 81134 449790 0 0 3 0x14200 reaper reaper 14413 391106 0 0 3 0x14200 pgdaemon pagedaemon 62841 390302 0 0 3 0x14200 bored viomb 76753 286426 0 0 3 0x40014200 acpi0 acpi0 96024 366888 0 0 3 0x14200 bored softnet3 25226 290089 0 0 3 0x14200 bored softnet2 72323 419219 0 0 3 0x14200 bored softnet1 25567 315166 0 0 2 0x14200 softnet0 923 82240 0 0 3 0x14200 bored systqmp 67458 280894 0 0 3 0x14200 bored systq 11427 391 0 0 2 0x40014200 softclock 35881 138996 0 0 3 0x40014200 idle0 1 203547 0 0 3 0x8000082 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 10204 6683K 10571K 166960K 14265 0 pcb 17 16K 18K 166960K 231 0 rtable 218 8K 9K 166960K 1960 0 pf 33 9K 10K 166960K 160 0 ifaddr 44 12K 12K 166960K 258 0 ifgroup 58 2K 2K 166960K 291 0 sysctl 3 0K 0K 166960K 3 0 counters 32 17K 17K 166960K 91 0 ioctlops 0 0K 2K 166960K 171 0 iov 0 0K 18K 166960K 91 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1417 89K 89K 166960K 3282 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 53 0 dirhash 12 2K 2K 166960K 51 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 101K 166960K 2009 0 sigio 1 0K 0K 166960K 28 0 proc 58 59K 116K 166960K 1857 0 subproc 117 7K 8K 166960K 793 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 224 0 in_multi 98 7K 7K 166960K 642 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 3 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 1211 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 285 97K 116K 166960K 17343 0 UVM aobj 56 7K 7K 166960K 61 0 pinsyscall 38 76K 102K 166960K 4393 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 71 0 NDP 13 0K 2K 166960K 180 0 temp 77 6812K 6940K 166960K 94537 0 kqueue 13 20K 26K 166960K 183 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 120 272 0 267 1 0 1 1 0 8 0 rtentry 112 696 0 599 4 0 4 4 0 8 1 unpcb 144 981 0 966 2 1 1 2 0 8 0 syncache 336 9 0 9 2 1 1 1 0 8 1 sackhl 24 2 0 2 1 0 1 1 0 8 1 tcpqe 32 5 0 5 1 0 1 1 0 8 1 tcpcb 808 451 0 445 6 4 2 5 0 8 1 arp 88 134 0 117 1 0 1 1 0 8 0 ipq 40 6 0 6 1 0 1 1 0 8 1 ipqe 40 97 0 97 1 0 1 1 0 8 1 inpcb 352 1792 0 1777 15 12 3 13 0 8 1 nd6 104 174 0 149 1 0 1 1 0 8 0 pkpcb 40 13 0 13 2 1 1 1 0 8 1 kcovpl 48 61 0 52 1 0 1 1 0 8 0 ppxss 1072 6 0 6 2 1 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 2706 0 2250 56 27 29 30 0 8 0 art_table 32 2708 0 2250 4 0 4 4 0 8 0 art_node 16 689 0 602 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 40 0 30 1 0 1 1 0 8 0 shmpl 112 58 0 5 2 0 2 2 0 8 0 dirhash 1024 43 0 26 3 0 3 3 0 8 0 dino2pl 256 3932 0 2415 96 0 96 96 0 8 0 ffsino 240 3932 0 2415 90 0 90 90 0 8 0 nchpl 144 6356 0 4623 67 0 67 67 0 8 0 uvmvnodes 80 5574 0 0 114 0 114 114 0 8 0 vnodes 216 5574 0 0 310 0 310 310 0 8 0 vnodes: pool(0xffffffff82d3acb8:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd80684f5f90 (p 0xfffffd80684f5000) namei 1024 26746 0 26745 4 2 2 3 0 8 1 vcpupl 3904 5 0 1 1 0 1 1 0 8 0 vmpool 664 16 0 12 1 0 1 1 0 8 0 kstatmem 264 144 0 118 2 0 2 2 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 43641 0 43641 9 7 2 8 1 8 2 plimitpl 152 303 0 287 1 0 1 1 0 8 0 sigapl 424 2228 0 2160 9 0 9 9 0 8 0 futexpl 64 25650 0 25647 1 0 1 1 0 8 0 knotepl 120 9541 0 9459 22 10 12 15 0 8 8 kqueuepl 184 398 0 387 1 0 1 1 0 8 0 pipepl 288 517 0 487 5 0 5 5 0 8 2 fdescpl 432 2189 0 2161 5 0 5 5 0 8 0 filepl 120 13111 0 12836 15 5 10 14 0 8 1 lockfpl 104 504 0 501 1 0 1 1 0 8 0 lockfspl 48 226 0 223 1 0 1 1 0 8 0 sessionpl 144 70 0 53 1 0 1 1 0 8 0 pgrppl 48 84 0 67 1 0 1 1 0 8 0 ucredpl 104 1747 0 1737 1 0 1 1 0 8 0 zombiepl 144 2163 0 2160 1 0 1 1 0 8 0 processpl 1080 2228 0 2160 6 0 6 6 0 8 0 procpl 656 3740 0 3652 9 0 9 9 0 8 1 sosppl 168 5 0 5 2 1 1 1 0 8 1 sockpl 504 3075 0 3043 24 17 7 20 0 8 2 mcl64k 65536 12 0 12 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 4 0 4 2 1 1 1 0 8 1 mcl8k 8192 48 0 48 2 1 1 1 0 8 1 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 27705 0 27609 46 25 21 38 0 8 8 mtagpl 96 49 0 46 1 0 1 1 0 8 0 mbufpl 256 69167 0 68943 115 93 22 63 0 8 1 bufpl 280 11212 0 3088 581 0 581 581 0 8 0 anonpl 24 419046 0 412901 113 46 67 95 0 188 4 amapchunkpl 152 57827 0 57183 59 21 38 49 0 158 10 amappl16 200 9533 0 9385 39 18 21 21 0 8 9 amappl15 192 12 0 11 1 0 1 1 0 8 0 amappl14 184 302 0 289 2 1 1 2 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 3512 0 3483 2 0 2 2 0 8 0 amappl11 160 53 0 43 1 0 1 1 0 8 0 amappl10 152 100 0 90 1 0 1 1 0 8 0 amappl9 144 143 0 142 1 0 1 1 0 8 0 amappl8 136 169 0 139 2 0 2 2 0 8 0 amappl7 128 76 0 62 1 0 1 1 0 8 0 amappl6 120 927 0 912 2 1 1 2 0 8 0 amappl5 112 348 0 336 1 0 1 1 0 8 0 amappl4 104 847 0 815 3 1 2 2 0 8 1 amappl3 96 11031 0 10952 3 0 3 3 0 8 0 amappl2 88 2833 0 2757 3 1 2 3 0 8 0 amappl1 80 18226 0 17711 25 11 14 22 0 8 1 amappl 88 16367 0 16177 5 0 5 5 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 60 0 5 1 0 1 1 0 8 0 uaddrrnd 24 2205 0 2173 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2205 0 2173 1 0 1 1 0 8 0 vmmpekpl 168 20521 0 20463 3 0 3 3 0 8 0 vmmpepl 168 166680 0 164797 134 27 107 112 0 357 12 vmsppl 344 2204 0 2173 4 0 4 4 0 8 0 rwobjpl 24 50302 0 43547 43 0 43 43 0 8 0 pdppl 4096 4416 0 4350 275 204 71 87 0 8 5 pvpl 32 1060062 0 1047470 416 240 176 359 0 265 37 pmappl 216 2204 0 2173 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 733 0 377 12 0 12 12 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_symlink(ffff8000329b3b10) at ufs_symlink+0xa2 sys/ufs/ufs/ufs_vnops.c:1304 VOP_SYMLINK(fffffd80776197d8,ffff8000329b3c90,ffff8000329b3cc0,ffff8000329b3bc0,ffff80002a676000) at VOP_SYMLINK+0xd7 sys/kern/vfs_vops.c:432 dosymlinkat(ffff80002a678cf0,20000040,9,20000340) at dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1810 syscall(ffff8000329b3e40) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd5504fb090, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_symlink(ffff8000329b3b10) at ufs_symlink+0xa2 sys/ufs/ufs/ufs_vnops.c:1304 VOP_SYMLINK(fffffd80776197d8,ffff8000329b3c90,ffff8000329b3cc0,ffff8000329b3bc0,ffff80002a676000) at VOP_SYMLINK+0xd7 sys/kern/vfs_vops.c:432 dosymlinkat(ffff80002a678cf0,20000040,9,20000340) at dosymlinkat+0x158 sys/kern/vfs_syscalls.c:1810 syscall(ffff8000329b3e40) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbd5504fb090, count: -5