uvm_fault(0xffffffff83ac14f8, 0xffff800026872004, 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 *245510 55077 0 0 0x4000000 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff0006cc6c950,ffff80002a86f520,ffff80002a86f550) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a86f4f0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a86f4f0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a86f4f0,10223,0) at vn_open+0x22e sys/kern/vfs_vnops.c:109 doopenat(ffff80002a736d00,ffffff9c,200000000000,10622,0,0,2f9798ee2011f28c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_openat(ffff80002a736d00,ffff80002a86f790,ffff80002a86f6e0) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1101 syscall(ffff80002a86f790) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86f790) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f3aea9d1b0, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83ac14f8, 0xffff800026872004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff0006cc6c950,ffff80002a86f520,ffff80002a86f550) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a86f4f0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a86f4f0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a86f4f0,10223,0) at vn_open+0x22e sys/kern/vfs_vnops.c:109 doopenat(ffff80002a736d00,ffffff9c,200000000000,10622,0,0,2f9798ee2011f28c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_openat(ffff80002a736d00,ffff80002a86f790,ffff80002a86f6e0) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1101 syscall(ffff80002a86f790) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86f790) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f3aea9d1b0, count: -9 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a86f150 rbx 0 rdx 0xffff8000015e7a40 rcx 0xffffffff rax 0xffff80002a736d00 r8 0xffffffffffffffff r9 0xfffff00007ffd958 r10 0xcf95b6622b187bca r11 0x28fa8a398f04fa31 r12 0xfffff000662e9cd0 r13 0 r14 0 r15 0xffff800026872000 rip 0xffffffff8163a7d3 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a86f060 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=245510 pid=55077 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=0xffff80002a736f98,0xffffffff83ab7688 process=0xffff8000ffff8018 user=0xffff80002a86a000, vmspace=0xfffff0006ca968b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 55077 233438 67873 0 2 0 syz-executor *55077 245510 67873 0 7 0x4000000 syz-executor 56212 228204 70328 0 2 0x2 sh 93383 47036 99524 0 2 0 syz-executor 93383 515400 99524 0 3 0x4000080 fsleep syz-executor 77758 266751 54375 0 2 0 syz-executor 96129 62931 51435 0 2 0 syz-executor 96129 52599 51435 0 3 0x4000080 fsleep syz-executor 53972 137771 54269 0 2 0xc80 syz-executor 53972 497218 54269 0 2 0x4000000 syz-executor 81204 123865 95667 0 2 0 syz-executor 81204 264094 95667 0 3 0x4000080 fsleep syz-executor 70328 26676 44989 0 3 0x82 wait syz-executor 51435 261203 44989 0 3 0x82 nanoslp syz-executor 2530 470327 1 0 3 0x100083 ttyin getty 67873 370318 44989 0 2 0xc82 syz-executor 54375 165903 44989 0 3 0x82 nanoslp syz-executor 99524 349680 44989 0 3 0x82 nanoslp syz-executor 54269 489579 44989 0 3 0x82 nanoslp syz-executor 95667 246185 44989 0 3 0x82 nanoslp syz-executor 44989 219895 1 0 2 0x2 syz-executor 10388 445988 95057 0 3 0x98 kqread sshd-session 95057 49177 1 0 3 0x92 kqread sshd-session 21847 185813 1 73 3 0x1100090 kqread syslogd 55655 185307 0 0 3 0x14200 bored smr 20364 436710 0 0 2 0x14200 zerothread 65169 327066 0 0 3 0x14200 aiodoned aiodoned 87982 509022 0 0 3 0x14200 syncer update 38174 353688 0 0 3 0x14200 cleaner cleaner 53187 266650 0 0 3 0x14200 reaper reaper 90862 28789 0 0 3 0x14200 pgdaemon pagedaemon 77658 72865 0 0 3 0x14200 bored viomb 94905 66620 0 0 3 0x40014200 acpi0 acpi0 64497 507739 0 0 2 0x14200 softnet0 29969 20217 0 0 3 0x14200 bored systqmp 99491 344711 0 0 3 0x14200 bored systq 27777 360018 0 0 3 0x40014200 tmoslp softclock 35752 418037 0 0 3 0x40014200 idle0 1 151671 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 11065 12246K 12446K 166960K 13180 0 pcb 17 12K 13K 166960K 134 0 rtable 201 6K 8K 166960K 612 0 pf 36 14K 21K 166960K 242 0 ifaddr 37 6K 7K 166960K 83 0 ifgroup 51 2K 2K 166960K 99 0 sysctl 4 1K 9K 166960K 80 0 counters 33 17K 18K 166960K 49 0 ioctlops 0 0K 4K 166960K 430 0 iov 0 0K 12K 166960K 97 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1386 87K 87K 166960K 2543 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 131 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 860 0 sigio 0 0K 0K 166960K 6 0 proc 20 25K 83K 166960K 762 0 subproc 72 4K 4K 166960K 135 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 416 0 in_multi 78 5K 7K 166960K 187 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 598 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 138 91K 148K 166960K 8770 0 UVM aobj 15 2K 4K 166960K 19 0 pinsyscall 25 50K 92K 166960K 2112 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 35 0 NDP 11 0K 2K 166960K 57 0 temp 53 9110K 13207K 166960K 22595 0 kqueue 8 13K 27K 166960K 172 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 120 158 0 158 4 3 1 3 0 8 1 rtentry 136 194 0 108 4 0 4 4 0 8 0 unpcb 144 750 0 741 7 4 3 6 0 8 2 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpcb 736 260 0 258 7 0 7 7 0 8 6 arp 96 31 0 14 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 6 0 4 1 0 1 1 0 8 0 inpcb 328 1006 0 1002 15 8 7 9 0 8 5 ip6q 72 3 0 2 1 0 1 1 0 8 0 ip6af 40 6 0 4 1 0 1 1 0 8 0 nd6 112 49 0 29 1 0 1 1 0 8 0 pkpcb 40 8 0 8 1 1 0 1 0 8 0 kcovpl 48 15 0 7 1 0 1 1 0 8 0 ppxss 1072 8 0 8 1 0 1 1 0 8 1 pfstscr 40 11 0 9 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfsrclim 320 2 0 2 1 1 0 1 0 8 0 pfanchor 1288 5 0 1 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 11 0 9 1 0 1 1 0 8 0 pfstate 384 6 0 5 1 0 1 1 0 8 0 pfrule 1360 136 0 136 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 806 0 433 32 2 30 30 0 8 4 art_table 40 809 0 433 5 0 5 5 0 8 0 art_node 32 192 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 12 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 123 0 113 1 0 1 1 0 8 0 shmpl 112 16 0 4 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3160 0 1687 93 0 93 93 0 8 0 ffsino 256 3160 0 1687 93 0 93 93 0 8 0 nchpl 144 4225 0 2509 64 0 64 64 0 8 0 vnodes 216 3773 0 0 210 0 210 210 0 8 0 namei 1024 15494 0 15493 3 2 1 2 0 8 0 kstatmem 264 55 0 32 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 16737 0 16737 10 7 3 8 1 8 3 plimitpl 152 255 0 242 1 0 1 1 0 8 0 sigapl 424 1131 0 1096 6 1 5 6 0 8 0 knotepl 120 32476 0 32440 24 14 10 16 0 8 8 kqueuepl 184 320 0 313 4 0 4 4 0 8 3 pipepl 304 191 0 164 3 0 3 3 0 8 0 fdescpl 448 1117 0 1095 5 1 4 5 0 8 0 filepl 120 8503 0 8309 15 1 14 15 0 8 7 lockfpl 104 306 0 303 1 0 1 1 0 8 0 lockfspl 48 131 0 128 1 0 1 1 0 8 0 sessionpl 144 125 0 120 1 0 1 1 0 8 0 pgrppl 48 145 0 132 1 0 1 1 0 8 0 ucredpl 104 2354 0 2347 1 0 1 1 0 8 0 zombiepl 144 1097 0 1096 1 0 1 1 0 8 0 processpl 1152 1131 0 1096 4 0 4 4 0 8 0 procpl 664 2092 0 2052 6 1 5 6 0 8 1 sosppl 176 7 0 7 2 1 1 1 0 8 1 sockpl 552 1944 0 1931 16 10 6 11 0 8 4 mcl64k 65536 47 0 46 1 0 1 1 0 8 0 mcl16k 16384 3 0 3 1 1 0 1 0 8 0 mcl9k128 9344 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 79 0 79 2 1 1 1 0 8 1 mcl4k 4096 3407 0 3353 16 8 8 15 0 8 0 mcl2k 2048 742 0 739 2 1 1 2 0 8 0 mtagpl 96 16 0 7 1 0 1 1 0 8 0 mbufpl 256 10579 0 10413 13 0 13 13 0 8 0 bufpl 272 6778 0 562 415 0 415 415 0 8 0 anonpl 24 156370 0 154231 70 23 47 52 0 186 14 amapchunkpl 152 28070 0 27742 33 13 20 32 0 158 4 amappl16 200 2557 0 2533 34 23 11 15 0 8 8 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 483 0 483 2 1 1 1 0 8 1 amappl13 176 139 0 135 1 0 1 1 0 8 0 amappl12 168 1379 0 1359 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 57 0 55 1 0 1 1 0 8 0 amappl9 144 269 0 268 2 1 1 1 0 8 0 amappl8 136 115 0 115 2 1 1 1 0 8 1 amappl7 128 151 0 146 1 0 1 1 0 8 0 amappl6 120 208 0 206 1 0 1 1 0 8 0 amappl5 112 93 0 87 1 0 1 1 0 8 0 amappl4 104 375 0 367 1 0 1 1 0 8 0 amappl3 96 5731 0 5659 3 0 3 3 0 8 0 amappl2 88 571 0 546 2 0 2 2 0 8 0 amappl1 80 13494 0 13187 13 1 12 13 0 8 0 amappl 88 7822 0 7710 4 0 4 4 0 92 0 uvmvnodes 80 111 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 dma256 256 7 0 7 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 18 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1117 0 1095 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1117 0 1095 1 0 1 1 0 8 0 vmmpekpl 168 9997 0 9955 3 0 3 3 0 8 0 vmmpepl 168 77206 0 76036 82 14 68 80 0 357 5 vmsppl 368 1116 0 1095 4 1 3 4 0 8 0 rwobjpl 40 22255 0 21655 11 1 10 11 0 8 0 pdppl 4096 2240 0 2190 104 52 52 78 0 8 2 pvpl 32 463940 0 457381 135 33 102 115 0 265 27 pmappl 216 1116 0 1095 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 802 0 73 21 0 21 21 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff0006cc6c950,ffff80002a86f520,ffff80002a86f550) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a86f4f0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a86f4f0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a86f4f0,10223,0) at vn_open+0x22e sys/kern/vfs_vnops.c:109 doopenat(ffff80002a736d00,ffffff9c,200000000000,10622,0,0,2f9798ee2011f28c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_openat(ffff80002a736d00,ffff80002a86f790,ffff80002a86f6e0) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1101 syscall(ffff80002a86f790) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86f790) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f3aea9d1b0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff0006cc6c950,ffff80002a86f520,ffff80002a86f550) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a86f4f0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a86f4f0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a86f4f0,10223,0) at vn_open+0x22e sys/kern/vfs_vnops.c:109 doopenat(ffff80002a736d00,ffffff9c,200000000000,10622,0,0,2f9798ee2011f28c) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_openat(ffff80002a736d00,ffff80002a86f790,ffff80002a86f6e0) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1101 syscall(ffff80002a86f790) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a86f790) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f3aea9d1b0, count: -9