login: uvm_fault(0xffffffff83aad520, 0xffff80001b1f2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *104622 9111 0 0 0x4000000 0 syz-executor 218290 74566 0 0x2 0 1 syz-executor ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b580700,ffff800033b8eb18,ffff800033b8eb48) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800033b8eae8) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 namei(ffff800033b8eae8) at namei+0x7c5 sys/kern/vfs_lookup.c:250 vn_open(ffff800033b8eae8,1,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff8000fffe9248,ffffff9c,200000000080,0,0,0,ab9a718029e54de4) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff8000fffe9248,ffff800033b8eda0,ffff800033b8ecf0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff800033b8eda0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033b8eda0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf707b14fd20, count: 6 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff83aad520, 0xffff80001b1f2004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b580700,ffff800033b8eb18,ffff800033b8eb48) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800033b8eae8) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 namei(ffff800033b8eae8) at namei+0x7c5 sys/kern/vfs_lookup.c:250 vn_open(ffff800033b8eae8,1,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff8000fffe9248,ffffff9c,200000000080,0,0,0,ab9a718029e54de4) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff8000fffe9248,ffff800033b8eda0,ffff800033b8ecf0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff800033b8eda0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033b8eda0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf707b14fd20, count: -9 ddb{0}> show registers rdi 0 rsi 0x2 rbp 0xffff800033b8e750 rbx 0 rdx 0xffff8000015f6480 rcx 0xffff8000fffe9248 rax 0xffffffff83984ff0 cpu_info_full_primary+0x1ff0 r8 0xffffffffffffffff r9 0xfffffd80097fd548 r10 0xb899ff844f719afd r11 0xb763023df0118600 r12 0xfffffd800f9117c8 r13 0 r14 0 r15 0xffff80001b1f2000 rip 0xffffffff814be483 ufs_lookup+0x623 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800033b8e660 ss 0x10 ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx ddb{0}> show proc PROC (syz-executor) tid=104622 pid=9111 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe8a80,0xffff8000fffe82c8 process=0xffff8000fffe7040 user=0xffff800033b89000, vmspace=0xfffffd806c5183f0 estcpu=36, cpticks=3, pctcpu=0.0, user=1, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 56708 105848 82575 0 2 0 syz-executor 56708 503050 82575 0 3 0x4000080 sbwait syz-executor 9111 225780 74566 0 2 0 syz-executor * 9111 104622 74566 0 7 0x4000000 syz-executor 14261 336993 67274 0 3 0x80 nanoslp syz-executor 14261 103296 67274 0 3 0x4000080 kqsel syz-executor 14261 373827 67274 0 3 0x4000080 fsleep syz-executor 41014 348833 20494 0 3 0x80 nanoslp syz-executor 41014 103430 20494 0 3 0x4000080 netcon syz-executor 41014 89495 20494 0 3 0x4000080 fsleep syz-executor 41014 475859 20494 0 3 0x4000080 fsleep syz-executor 43583 463640 85124 0 2 0xc80 syz-executor 43583 259379 85124 0 3 0x4000080 ttyin syz-executor 43583 283680 85124 0 3 0x4000080 fsleep syz-executor 72151 195744 1 0 3 0x100083 ttyin getty 3549 131357 54031 0 3 0x100082 sbwait ndp 54031 379587 37589 0 3 0x10008a sigsusp sh 20494 305870 53158 0 3 0x82 nanoslp syz-executor 11925 253488 53158 0 3 0x82 wait syz-executor 67274 332932 53158 0 3 0x82 nanoslp syz-executor 82575 347960 53158 0 3 0x82 nanoslp syz-executor 74566 218290 53158 0 7 0x2 syz-executor 85124 284455 53158 0 2 0xc82 syz-executor 37589 255833 53158 0 3 0x82 wait syz-executor 53158 296213 21703 0 3 0x82 wait syz-executor 21703 451937 14527 0 3 0x10008a sigsusp ksh 14527 277617 53935 0 3 0x98 kqread sshd-session 53935 66616 57646 0 3 0x92 kqread sshd-session 57646 127762 1 0 3 0x88 kqread sshd 14463 45991 26355 74 3 0x1100092 bpf pflogd 26355 447310 1 0 3 0x80 sbwait pflogd 57968 432411 77366 73 3 0x1100090 kqread syslogd 77366 283924 1 0 3 0x100082 sbwait syslogd 42329 128994 1 0 3 0x100080 kqread resolvd 26762 188562 3 77 3 0x100092 kqread dhcpleased 21293 439331 3 77 3 0x100092 kqread dhcpleased 3 474194 1 0 3 0x80 kqread dhcpleased 39937 433044 0 0 3 0x14200 bored smr 6160 259987 0 0 3 0x14200 pgzero zerothread 7617 25295 0 0 3 0x14200 aiodoned aiodoned 9666 138940 0 0 3 0x14200 syncer update 36574 447500 0 0 3 0x14200 cleaner cleaner 38699 117775 0 0 3 0x14200 reaper reaper 58208 281864 0 0 3 0x14200 pgdaemon pagedaemon 80192 290558 0 0 3 0x14200 bored viomb 4784 351710 0 0 3 0x40014200 acpi0 acpi0 37329 517262 0 0 3 0x40014200 idle1 59242 237561 0 0 3 0x14200 bored softnet1 53119 45183 0 0 3 0x14200 bored softnet0 94599 357297 0 0 3 0x14200 bored systqmp 80303 128787 0 0 3 0x14200 bored systq 76728 20287 0 0 3 0x14200 tmoslp softclockmp 98390 469430 0 0 3 0x40014200 tmoslp softclock 78387 82459 0 0 3 0x40014200 idle0 1 51545 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 9111 (syz-executor) thread 0xffff8000fffe9248 (104622) exclusive rrwlock inode r = 0 (0xfffffd806e658118) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 vn_open+0x178 sys/kern/vfs_vnops.c:146 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #9 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a9f740) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 doopenat+0x340 sys/kern/vfs_syscalls.c:1161 #2 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11066 12090K 12350K 166960K 12790 0 pcb 17 12K 12K 166960K 99 0 rtable 249 10K 10K 166960K 412 0 pf 36 18K 25K 166960K 212 0 ifaddr 41 7K 7K 166960K 53 0 ifgroup 55 2K 2K 166960K 67 0 sysctl 4 1K 9K 166960K 11 0 counters 70 37K 37K 166960K 96 0 ioctlops 0 0K 4K 166960K 1683 0 iov 0 0K 16K 166960K 89 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1319 83K 84K 166960K 1810 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 29 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 114K 166960K 571 0 sigio 0 0K 0K 166960K 8 0 proc 72 115K 164K 166960K 633 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 1 0K 0K 166960K 54 0 in_multi 97 7K 7K 166960K 120 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 411 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 244 161K 180K 166960K 6950 0 UVM aobj 16 2K 2K 166960K 17 0 pinsyscall 44 88K 106K 166960K 1734 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 56 0 NDP 12 0K 2K 166960K 34 0 temp 46 9116K 9181K 166960K 22433 0 kqueue 15 24K 30K 166960K 117 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 58 0 54 1 0 1 1 0 8 0 rtentry 176 121 0 14 5 0 5 5 0 8 0 unpcb 144 243 0 222 2 0 2 2 0 8 1 syncache 336 15 0 15 1 0 1 1 0 8 1 tcpcb 736 136 0 129 4 0 4 4 0 8 3 arp 136 20 0 3 1 0 1 1 0 8 0 inpcb 328 483 0 471 4 0 4 4 0 8 2 nd6 152 28 0 2 2 0 2 2 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 13 0 13 1 0 1 1 0 8 1 pfstscr 40 4 0 4 1 0 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 5 0 2 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 44 0 0 4 0 4 4 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 66 0 3 1 0 1 1 0 8 0 pfstkey 128 70 0 7 3 0 3 3 0 8 0 pfstate 448 68 0 5 8 0 8 8 0 8 0 pfrule 1360 32 0 26 2 1 1 2 0 8 0 rttmr 136 2 0 1 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 542 0 66 32 0 32 32 0 8 1 art_table 40 544 0 66 6 0 6 6 0 8 0 art_node 32 121 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 64 23 0 13 1 0 1 1 0 8 0 shmpl 112 14 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2417 0 955 93 0 93 93 0 8 0 ffsino 296 2417 0 955 114 0 114 114 0 8 0 nchpl 144 3246 0 1544 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 2738 0 0 153 0 153 153 0 8 0 namei 1024 10532 0 10531 1 0 1 1 0 8 0 percpumem 16 63 0 13 1 0 1 1 0 8 0 kstatmem 264 39 0 12 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 14375 0 14375 4 3 1 3 1 8 1 plimitpl 152 75 0 58 1 0 1 1 0 8 0 sigapl 424 885 0 837 7 0 7 7 0 8 0 knotepl 120 321 0 0 10 0 10 10 0 8 0 kqueuepl 224 147 0 134 1 0 1 1 0 8 0 pipepl 344 159 0 132 3 0 3 3 0 8 0 fdescpl 528 868 0 836 3 0 3 3 0 8 0 filepl 160 4534 0 4306 13 0 13 13 0 8 3 lockfpl 104 134 0 132 1 0 1 1 0 8 0 lockfspl 48 65 0 63 1 0 1 1 0 8 0 sessionpl 144 47 0 38 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 867 0 854 1 0 1 1 0 8 0 zombiepl 144 839 0 837 1 0 1 1 0 8 0 processpl 1232 885 0 837 5 0 5 5 0 8 0 procpl 664 1605 0 1548 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 879 0 842 7 0 7 7 0 8 3 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 27 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 208 0 0 13 0 13 13 0 8 0 bufpl 280 7485 0 1232 447 0 447 447 0 8 0 anonpl 32 7605 0 0 62 0 62 62 0 246 0 amapchunkpl 152 21823 0 21339 29 2 27 29 0 158 6 amappl16 200 2930 0 2900 20 8 12 15 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 429 0 426 1 0 1 1 0 8 0 amappl13 176 127 0 114 1 0 1 1 0 8 0 amappl12 168 1118 0 1087 2 0 2 2 0 8 0 amappl11 160 31 0 30 1 0 1 1 0 8 0 amappl10 152 77 0 63 1 0 1 1 0 8 0 amappl9 144 277 0 277 1 1 0 1 0 8 0 amappl8 136 120 0 117 1 0 1 1 0 8 0 amappl7 128 150 0 136 1 0 1 1 0 8 0 amappl6 120 176 0 172 1 0 1 1 0 8 0 amappl5 112 163 0 152 1 0 1 1 0 8 0 amappl4 104 319 0 296 1 0 1 1 0 8 0 amappl3 96 4386 0 4270 4 0 4 4 0 8 0 amappl2 88 568 0 503 2 0 2 2 0 8 0 amappl1 80 12872 0 12235 17 2 15 17 0 8 1 amappl 88 6132 0 5966 5 0 5 5 0 92 0 uvmvnodes 80 115 0 0 3 0 3 3 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 16 0 1 1 0 1 1 0 8 0 uaddrrnd 24 868 0 836 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 868 0 836 1 0 1 1 0 8 0 vmmpekpl 168 9064 0 9032 2 0 2 2 0 8 0 vmmpepl 168 64042 0 62064 100 2 98 100 0 357 9 vmsppl 488 867 0 836 5 0 5 5 0 8 0 rwobjpl 80 20675 0 19560 30 2 28 28 0 8 0 pdppl 4096 1743 0 1672 103 30 73 85 0 8 2 pvpl 32 14677 0 0 119 0 119 119 0 265 0 pmappl 256 867 0 836 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 292 0 34 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806b580700,ffff800033b8eb18,ffff800033b8eb48) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800033b8eae8) at vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 namei(ffff800033b8eae8) at namei+0x7c5 sys/kern/vfs_lookup.c:250 vn_open(ffff800033b8eae8,1,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff8000fffe9248,ffffff9c,200000000080,0,0,0,ab9a718029e54de4) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff8000fffe9248,ffff800033b8eda0,ffff800033b8ecf0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff800033b8eda0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033b8eda0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf707b14fd20, count: -9 ddb{0}> machine ddbcpu 1