uvm_fault(0xffffffff839367d8, 0xffff8000296a2004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d TID PID UID PRFLAGS PFLAGS CPU COMMAND *314125 76729 0 0 0x4000000 0K syz-executor ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8061cc9288,ffff80003c4d0ee8,ffff80003c4d0f18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4d0eb8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c4d0eb8) at namei+0x7aa sys/kern/vfs_lookup.c:250 vn_open(ffff80003c4d0eb8,81,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140 doopenat(ffff8000384bfc58,ffffff9c,200000000000,80,0,ffff80003c4d1060) at doopenat+0x32e sys/kern/vfs_syscalls.c:1139 syscall(ffff80003c4d1110) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4d1110) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x64e7c47bd70, count: 7 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(0xffffffff839367d8, 0xffff8000296a2004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8061cc9288,ffff80003c4d0ee8,ffff80003c4d0f18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4d0eb8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c4d0eb8) at namei+0x7aa sys/kern/vfs_lookup.c:250 vn_open(ffff80003c4d0eb8,81,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140 doopenat(ffff8000384bfc58,ffffff9c,200000000000,80,0,ffff80003c4d1060) at doopenat+0x32e sys/kern/vfs_syscalls.c:1139 syscall(ffff80003c4d1110) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4d1110) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x64e7c47bd70, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c4d0b30 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd8077445b20 r8 0xffffffffffffffff r9 0xfffffd807f7d2340 r10 0xd734454b7f051858 r11 0x921e2cd8555bab22 r12 0 r13 0xfffffd806f7ca578 r14 0 r15 0xffff8000296a2000 rip 0xffffffff82579681 ufs_lookup+0x5e1 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80003c4d0a20 ss 0x10 ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d ddb{0}> show proc PROC (syz-executor) tid=314125 pid=76729 tcnt=4 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=0xffff8000384be028,0xffff8000384bf9d8 process=0xffff80003c4c9bb0 user=0xffff80003c4cc000, vmspace=0xfffffd807eb8c1c8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 76729 486780 96786 0 2 0 syz-executor *76729 314125 96786 0 7 0x4000000 syz-executor 76729 16828 96786 0 3 0x4000080 fsleep syz-executor 76729 437164 96786 0 3 0x4000080 fsleep syz-executor 38818 458094 58559 0 2 0 syz-executor 38818 459758 58559 0 3 0x4000080 kqread syz-executor 38818 363593 58559 0 3 0x4000080 rest syz-executor 43313 239019 47276 0 2 0 syz-executor 43313 434028 47276 0 3 0x4000080 fsleep syz-executor 43313 165415 47276 0 3 0x4000080 fsleep syz-executor 42 232329 27723 0 3 0x80 nanoslp syz-executor 42 379664 27723 0 3 0x4000080 kqsel syz-executor 42 83755 27723 0 3 0x4000080 fsleep syz-executor 47319 61593 41386 0 3 0x80 nanoslp syz-executor 47319 324429 41386 0 3 0x4000080 sbwait syz-executor 47319 343127 41386 0 3 0x4000080 fsleep syz-executor 96786 510220 94419 0 3 0x82 nanoslp syz-executor 41386 242358 94419 0 3 0x82 nanoslp syz-executor 47276 118836 94419 0 3 0x82 nanoslp syz-executor 32459 217041 0 0 3 0x14280 nfsidl nfsio 79498 245321 0 0 3 0x14280 nfsidl nfsio 94494 171939 0 0 3 0x14280 nfsidl nfsio 16080 250716 0 0 3 0x14280 nfsidl nfsio 6378 485387 0 0 3 0x14280 nfsidl nfsio 27531 443623 0 0 3 0x14280 nfsidl nfsio 34905 185940 0 0 3 0x14280 nfsidl nfsio 71948 203820 0 0 3 0x14280 nfsidl nfsio 46576 16429 0 0 3 0x14280 nfsidl nfsio 79745 295187 0 0 3 0x14280 nfsidl nfsio 63271 223443 0 0 3 0x14280 nfsidl nfsio 11928 366128 0 0 3 0x14280 nfsidl nfsio 26476 143984 0 0 3 0x14280 nfsidl nfsio 45398 458041 0 0 3 0x14280 nfsidl nfsio 56917 210408 0 0 3 0x14280 nfsidl nfsio 1545 145720 0 0 3 0x14280 nfsidl nfsio 49159 511387 0 0 3 0x14280 nfsidl nfsio 50647 46034 0 0 3 0x14280 nfsidl nfsio 72938 334201 0 0 3 0x14280 nfsidl nfsio 52502 284383 0 0 3 0x14280 nfsidl nfsio 51843 260499 0 0 3 0x14200 bored sosplice 58559 16880 94419 0 3 0x82 nanoslp syz-executor 77852 367230 94419 0 3 0x82 wait syz-executor 27723 232299 94419 0 3 0x82 nanoslp syz-executor 94419 135977 71658 0 3 0x82 wait syz-executor 71658 163006 62427 0 3 0x10008a sigsusp ksh 62427 371457 32062 0 3 0x98 kqread sshd-session 32062 190306 84381 0 3 0x92 kqread sshd-session 74377 408391 1 0 3 0x100083 ttyin getty 84381 46080 1 0 3 0x88 kqread sshd 2029 500789 79987 74 3 0x1100092 bpf pflogd 79987 327954 1 0 3 0x80 sbwait pflogd 16518 99312 36344 73 3 0x1100090 kqread syslogd 36344 110318 1 0 3 0x100082 sbwait syslogd 12326 123497 1 0 3 0x100080 kqread resolvd 214 121443 13136 77 3 0x100092 kqread dhcpleased 68663 433875 13136 77 3 0x100092 kqread dhcpleased 13136 174740 1 0 3 0x80 kqread dhcpleased 43037 495129 0 0 3 0x14200 bored smr 67188 44908 0 0 2 0x14200 zerothread 44414 509160 0 0 3 0x14200 aiodoned aiodoned 90695 487817 0 0 3 0x14200 syncer update 78976 318560 0 0 3 0x14200 cleaner cleaner 74927 62136 0 0 3 0x14200 reaper reaper 2512 104354 0 0 3 0x14200 pgdaemon pagedaemon 66938 49119 0 0 3 0x14200 bored viomb 1151 307932 0 0 3 0x40014200 acpi0 acpi0 62377 429404 0 0 7 0x40014200 idle1 85508 74986 0 0 3 0x14200 bored softnet3 43318 301367 0 0 3 0x14200 bored softnet2 22743 217291 0 0 3 0x14200 bored softnet1 98407 366009 0 0 3 0x14200 bored softnet0 13101 1559 0 0 3 0x14200 bored systqmp 37209 415260 0 0 3 0x14200 bored systq 232 176246 0 0 3 0x14200 tmoslp softclockmp 97515 216629 0 0 3 0x40014200 tmoslp softclock 96117 523787 0 0 3 0x40014200 idle0 1 459292 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 76729 (syz-executor) thread 0xffff8000384bfc58 (314125) exclusive rrwlock inode r = 0 (0xfffffd806f7ca618) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x13f sys/kern/vfs_vnops.c:140 #8 doopenat+0x32e sys/kern/vfs_syscalls.c:1139 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839fc958) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 doopenat+0x314 sys/kern/vfs_syscalls.c:1139 #2 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #2 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10235 11045K 11696K 166960K 13578 0 pcb 18 18K 19K 166960K 452 0 rtable 271 12K 12K 166960K 724 0 pf 41 18K 22K 166960K 215 0 ifaddr 44 8K 9K 166960K 141 0 ifgroup 63 2K 3K 166960K 279 0 sysctl 4 1K 5K 166960K 6 0 counters 68 36K 37K 166960K 236 0 ioctlops 0 0K 4K 166960K 1738 0 iov 0 0K 16K 166960K 166 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1485 93K 94K 166960K 3242 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 30 0 VM map 2 1K 1K 166960K 2 0 sem 47 10K 11K 166960K 85 0 dirhash 12 2K 2K 166960K 66 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 1757 0 sigio 0 0K 0K 166960K 43 0 proc 78 103K 128K 166960K 863 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 207 0 in_multi 95 7K 7K 166960K 206 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 685 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 243 168K 189K 166960K 17376 0 UVM aobj 53 4K 4K 166960K 59 0 pinsyscall 41 82K 106K 166960K 3028 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 92 0 NDP 14 0K 1K 166960K 98 0 temp 76 8692K 8765K 166960K 74132 0 kqueue 19 25K 32K 166960K 326 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 141 0 137 1 0 1 1 0 8 0 rtentry 168 209 0 93 6 0 6 6 0 8 0 unpcb 144 1733 0 1712 14 10 4 9 0 8 2 syncache 336 9 0 9 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 480 0 474 14 13 1 11 0 8 0 arp 120 34 0 13 1 0 1 1 0 8 0 inpcb 376 2013 0 1998 33 28 5 15 0 8 3 nd6 136 46 0 18 2 0 2 2 0 8 0 pkpcb 40 8 0 8 3 3 0 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1168 47 0 47 2 1 1 1 0 8 1 pppxif 1480 13 0 13 4 3 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 8 0 1 1 0 1 1 0 482 0 pffrnode 88 8 0 1 1 0 1 1 0 8 0 pffrent 40 10 0 3 1 0 1 1 0 8 0 pfosfp 40 1431 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 55 0 30 1 0 1 1 0 8 0 pfstkey 128 57 0 32 2 0 2 2 0 8 0 pfstate 376 55 0 31 5 1 4 5 0 8 0 pfrule 1344 32 0 23 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 5 0 2 5 2 3 4 0 8 0 art_heap4 256 842 0 386 39 6 33 34 0 8 2 art_table 32 847 0 388 5 0 5 5 0 8 0 art_node 16 204 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 14 1 0 1 1 0 8 0 semupl 112 66 0 66 1 1 0 1 0 8 0 semapl 112 78 0 33 2 0 2 2 0 8 0 shmpl 112 56 0 6 2 0 2 2 0 8 0 dirhash 1024 54 0 37 3 0 3 3 0 8 0 dino2pl 256 4694 0 3181 96 0 96 96 0 8 0 ffsino 280 4694 0 3181 109 0 109 109 0 8 0 nchpl 144 7015 0 5313 65 1 64 64 0 8 0 rtmask 32 8 0 8 4 3 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 26090 0 26089 5 3 2 2 0 8 1 percpumem 16 132 0 84 1 0 1 1 0 8 0 kstatmem 264 144 0 116 6 3 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 4 3 1 1 0 8 1 scxspl 216 23235 0 23235 10 9 1 7 1 8 1 plimitpl 152 283 0 265 1 0 1 1 0 8 0 sigapl 424 2090 0 2021 11 2 9 9 0 8 0 futexpl 64 24791 0 24785 1 0 1 1 0 8 0 knotepl 120 547 0 0 17 0 17 17 0 8 0 kqueuepl 216 636 0 622 6 5 1 5 0 8 0 pipepl 328 301 0 274 6 3 3 6 0 8 0 fdescpl 504 2043 0 2013 5 0 5 5 0 8 0 filepl 152 14041 0 13814 27 14 13 19 0 8 2 lockfpl 104 682 0 680 2 1 1 2 0 8 0 lockfspl 48 240 0 238 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 74 0 57 1 0 1 1 0 8 0 ucredpl 104 2122 0 2109 1 0 1 1 0 8 0 zombiepl 144 2024 0 2021 1 0 1 1 0 8 0 processpl 1176 2090 0 2021 6 0 6 6 0 8 0 procpl 656 4643 0 4563 9 1 8 8 0 8 0 srpgc 96 13 0 13 3 3 0 1 0 8 0 sosppl 168 11 0 11 2 1 1 1 0 8 1 sockpl 688 3922 0 3884 53 43 10 22 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 29 0 0 1 0 1 1 0 8 0 mbufpl 256 350 0 0 22 0 22 22 0 8 0 bufpl 280 6868 0 714 440 0 440 440 0 8 0 anonpl 24 269834 0 266299 92 45 47 65 0 184 11 amapchunkpl 152 57653 0 57157 34 10 24 28 0 158 1 amappl16 200 4833 0 4802 56 41 15 25 0 8 10 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 141 0 129 1 0 1 1 0 8 0 amappl13 176 25 0 25 2 2 0 1 0 8 0 amappl12 168 2781 0 2750 4 1 3 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 71 0 71 1 1 0 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 128 0 116 1 0 1 1 0 8 0 amappl6 120 268 0 265 1 0 1 1 0 8 0 amappl5 112 142 0 132 1 0 1 1 0 8 0 amappl4 104 368 0 346 1 0 1 1 0 8 0 amappl3 96 11888 0 11773 4 0 4 4 0 8 0 amappl2 88 765 0 702 2 0 2 2 0 8 0 amappl1 80 16594 0 15996 16 2 14 15 0 8 0 amappl 88 16223 0 16053 6 1 5 6 0 92 0 dma32768 32768 1 0 1 1 1 0 1 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 dma256 256 9 0 9 4 4 0 1 0 8 0 dma128 128 256 0 256 4 3 1 1 0 8 1 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 58 0 6 1 0 1 1 0 8 0 uaddrrnd 24 2043 0 2013 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2043 0 2013 1 0 1 1 0 8 0 vmmpekpl 168 17397 0 17337 3 0 3 3 0 8 0 vmmpepl 168 130495 0 128537 121 19 102 110 0 357 3 vmsppl 456 2042 0 2013 6 1 5 5 0 8 0 rwobjpl 64 39243 0 32321 121 5 116 116 0 8 3 pdppl 4096 4094 0 4026 122 50 72 86 0 8 4 pvpl 32 18808 0 0 154 2 152 152 0 265 0 pmappl 248 2042 0 2013 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 349 0 87 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8061cc9288,ffff80003c4d0ee8,ffff80003c4d0f18) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c4d0eb8) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff80003c4d0eb8) at namei+0x7aa sys/kern/vfs_lookup.c:250 vn_open(ffff80003c4d0eb8,81,0) at vn_open+0x13f sys/kern/vfs_vnops.c:140 doopenat(ffff8000384bfc58,ffffff9c,200000000000,80,0,ffff80003c4d1060) at doopenat+0x32e sys/kern/vfs_syscalls.c:1139 syscall(ffff80003c4d1110) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4d1110) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x64e7c47bd70, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029a9bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5