uvm_fault(0xffffffff82c682a8, 0xffff800022c52004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *190449 9744 0 0 0x4000000 0 syz-executor.0 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806820a7c8,ffff8000329d3258,ffff8000329d3288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000329d3228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff8000329d3228) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff8000329d3228,70f,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a6f82c0,ffffff9c,20000040,70e,0,ffff8000329d3400) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff8000329d3470) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4b51dc5470, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff82c682a8, 0xffff800022c52004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806820a7c8,ffff8000329d3258,ffff8000329d3288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000329d3228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff8000329d3228) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff8000329d3228,70f,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a6f82c0,ffffff9c,20000040,70e,0,ffff8000329d3400) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff8000329d3470) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4b51dc5470, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000329d2e90 rbx 0 rdx 0xffff800000cf0f80 rcx 0xffffffff rax 0xfffffd806bed04b8 r8 0xffffffffffffffff r9 0xfffffd807f7d7888 r10 0x6e0b65e6bebdbb81 r11 0xa0f923c8ad9f1f2d r12 0 r13 0 r14 0 r15 0xffff800022c52000 rip 0xffffffff81924a7e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000329d2d90 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb> show proc PROC (syz-executor.0) tid=190449 pid=9744 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=71, usrpri=71, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a6f7298,0xffff80002a6f92c0 process=0xffff80002a6fa400 user=0xffff8000329ce000, vmspace=0xfffffd8069c4d010 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 52597 495626 2579 0 2 0 syz-executor.4 52597 303884 2579 0 2 0x4000000 syz-executor.4 52597 240332 2579 0 2 0x4000000 syz-executor.4 77583 286423 68803 0 2 0 syz-executor.3 77583 522131 68803 0 2 0x4000000 syz-executor.3 69205 147163 53333 0 2 0 syz-executor.6 9744 411681 67513 0 2 0 syz-executor.0 * 9744 190449 67513 0 7 0x4000000 syz-executor.0 37632 164103 46057 0 2 0 syz-executor.2 37632 197179 46057 0 3 0x4000080 fsleep syz-executor.2 37632 358804 46057 0 2 0x4000000 syz-executor.2 68803 465101 4744 0 3 0x82 nanoslp syz-executor.3 61990 142630 1 0 3 0x100083 ttyin getty 2579 61408 4744 0 3 0x82 nanoslp syz-executor.4 53333 297417 4744 0 3 0x82 nanoslp syz-executor.6 40035 421566 4744 0 3 0x2 biowait syz-executor.5 46057 160623 4744 0 3 0x82 nanoslp syz-executor.2 67513 364272 4744 0 3 0x82 nanoslp syz-executor.0 4744 143832 13059 0 3 0x2000082 wait syz-fuzzer 4744 131830 13059 0 2 0x6000002 syz-fuzzer 4744 144696 13059 0 3 0x6000082 kqread syz-fuzzer 4744 45243 13059 0 3 0x6000082 wait syz-fuzzer 4744 503898 13059 0 3 0x6000082 thrsleep syz-fuzzer 4744 63620 13059 0 3 0x6000082 wait syz-fuzzer 4744 251004 13059 0 3 0x6000082 thrsleep syz-fuzzer 4744 434384 13059 0 3 0x6000082 wait syz-fuzzer 4744 409330 13059 0 3 0x6000082 thrsleep syz-fuzzer 4744 176780 13059 0 3 0x6000082 thrsleep syz-fuzzer 4744 406186 13059 0 3 0x6000082 thrsleep syz-fuzzer 4744 212434 13059 0 3 0x6000082 wait syz-fuzzer 4744 457726 13059 0 3 0x6000082 wait syz-fuzzer 4744 207840 13059 0 3 0x6000082 wait syz-fuzzer 13059 268607 31880 0 3 0x10008a sigsusp ksh 31880 212998 22646 0 3 0x9a kqread sshd 22646 362485 1 0 3 0x88 kqread sshd 68018 12797 66753 73 3 0x1100090 kqread syslogd 66753 161285 1 0 3 0x100082 netio syslogd 85139 67486 1 0 3 0x100080 kqread resolvd 58432 262965 26216 77 3 0x100092 kqread dhcpleased 19507 292118 26216 77 3 0x100092 kqread dhcpleased 26216 432620 1 0 3 0x80 kqread dhcpleased 60872 273792 0 0 3 0x14200 bored smr 49277 96456 0 0 2 0x14200 zerothread 61251 189844 0 0 3 0x14200 aiodoned aiodoned 10748 22570 0 0 3 0x14200 syncer update 79967 394924 0 0 3 0x14200 cleaner cleaner 25743 386394 0 0 3 0x14200 reaper reaper 75452 372272 0 0 3 0x14200 pgdaemon pagedaemon 47679 164970 0 0 3 0x14200 bored viomb 80090 260485 0 0 3 0x40014200 acpi0 acpi0 79893 441114 0 0 3 0x14200 bored softnet3 87266 467992 0 0 3 0x14200 bored softnet2 31132 89803 0 0 3 0x14200 bored softnet1 24836 151157 0 0 3 0x14200 bored softnet0 84727 82825 0 0 3 0x14200 bored systqmp 73950 280889 0 0 3 0x14200 bored systq 66960 43126 0 0 3 0x40014200 tmoslp softclock 90969 361209 0 0 3 0x40014200 idle0 1 321481 0 0 3 0x82 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 10173 6464K 6669K 166960K 11783 0 pcb 13 12K 17K 166960K 182 0 rtable 215 6K 7K 166960K 815 0 pf 27 8K 9K 166960K 38 0 ifaddr 39 10K 11K 166960K 58 0 ifgroup 46 2K 2K 166960K 67 0 sysctl 1 0K 0K 166960K 1 0 counters 28 17K 17K 166960K 33 0 ioctlops 0 0K 2K 166960K 108 0 iov 0 0K 12K 166960K 222 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1379 86K 86K 166960K 1861 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 59 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 73K 166960K 584 0 sigio 0 0K 0K 166960K 6 0 proc 57 59K 75K 166960K 563 0 subproc 91 5K 6K 166960K 151 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1 0 in_multi 88 6K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 552 0 tdb 3 0K 0K 166960K 3 0 pagedep 1 8K 8K 166960K 1 0 inodedep 1 32K 32K 166960K 1 0 newblk 1 0K 0K 166960K 1 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 293 75K 93K 166960K 7321 0 UVM aobj 25 2K 2K 166960K 28 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 12 0K 1K 166960K 37 0 temp 63 5918K 5990K 166960K 13521 0 kqueue 12 18K 24K 166960K 42 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 120 229 0 226 4 1 3 3 0 8 2 rtentry 112 156 0 57 4 0 4 4 0 8 0 unpcb 144 243 0 230 5 2 3 3 0 8 2 syncache 312 7 0 7 2 2 0 1 0 8 0 tcpqe 32 51 0 51 2 2 0 1 0 8 0 tcpcb 808 101 0 91 8 0 8 8 0 8 6 arp 88 28 0 12 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 336 445 0 432 12 2 10 12 0 8 8 nd6 104 33 0 12 1 0 1 1 0 8 0 kcovpl 48 11 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 601 0 190 31 2 29 29 0 8 1 art_table 32 602 0 190 4 0 4 4 0 8 0 art_node 16 155 0 65 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 39 1 0 1 1 0 8 0 semupl 112 11 0 11 1 0 1 1 0 8 1 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 25 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2301 0 855 91 0 91 91 0 8 0 ffsino 240 2301 0 855 86 0 86 86 0 8 0 nchpl 144 3343 0 2867 63 32 31 63 0 8 8 uvmvnodes 80 2689 0 0 55 0 55 55 0 8 0 vnodes 216 2689 0 0 150 0 150 150 0 8 0 namei 1024 13994 0 13992 3 2 1 3 0 8 0 vmpool 664 3 0 3 1 1 0 1 0 8 0 kstatmem 264 30 0 10 2 0 2 2 0 8 0 scxspl 216 9432 0 9431 11 3 8 8 1 8 7 plimitpl 152 78 0 63 1 0 1 1 0 8 0 sigapl 424 876 0 835 6 0 6 6 0 8 1 futexpl 64 5011 0 5010 1 0 1 1 0 8 0 knotepl 120 7713 0 7641 3 0 3 3 0 8 0 kqueuepl 184 108 0 100 2 0 2 2 0 8 1 pipepl 288 297 0 273 7 4 3 7 0 8 1 fdescpl 432 860 0 835 4 0 4 4 0 8 0 filepl 120 6395 0 6181 14 2 12 14 0 8 4 lockfpl 104 98 0 96 1 0 1 1 0 8 0 lockfspl 48 44 0 42 1 0 1 1 0 8 0 sessionpl 144 27 0 12 1 0 1 1 0 8 0 pgrppl 48 95 0 80 1 0 1 1 0 8 0 ucredpl 104 1213 0 1200 1 0 1 1 0 8 0 zombiepl 144 836 0 835 1 0 1 1 0 8 0 processpl 1008 876 0 835 7 1 6 6 0 8 0 procpl 680 1526 0 1466 7 0 7 7 0 8 1 sockpl 456 921 0 892 25 12 13 20 0 8 9 mcl64k 65536 30 0 30 1 0 1 1 0 8 1 mcl16k 16384 12 0 12 2 1 1 1 0 8 1 mcl12k 12288 25 0 25 1 0 1 1 0 8 1 mcl9k 9216 5 0 5 1 0 1 1 0 8 1 mcl8k 8192 31 0 31 2 1 1 1 0 8 1 mcl4k 4096 78 0 78 1 0 1 1 0 8 1 mcl2k2 2112 8 0 8 1 0 1 1 0 8 1 mcl2k 2048 69775 0 69737 30 23 7 26 0 8 1 mtagpl 96 29 0 18 2 1 1 1 0 8 0 mbufpl 256 113925 0 113796 22 8 14 14 0 8 1 bufpl 288 4664 0 139 324 0 324 324 0 8 0 anonpl 24 238088 0 226826 84 0 84 84 0 188 0 amapchunkpl 152 24251 0 23466 40 1 39 39 0 158 6 amappl16 200 5980 0 5595 22 1 21 21 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 164 0 152 2 1 1 2 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 1534 0 1504 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 24 0 17 2 1 1 1 0 8 0 amappl9 144 149 0 148 1 0 1 1 0 8 0 amappl8 136 188 0 143 2 0 2 2 0 8 0 amappl7 128 193 0 173 2 0 2 2 0 8 0 amappl6 120 311 0 303 1 0 1 1 0 8 0 amappl5 112 130 0 121 1 0 1 1 0 8 0 amappl4 104 426 0 404 2 1 1 2 0 8 0 amappl3 96 5018 0 4944 3 0 3 3 0 8 0 amappl2 88 1319 0 1252 3 1 2 3 0 8 0 amappl1 80 11405 0 10900 22 11 11 22 0 8 0 amappl 88 6798 0 6597 6 0 6 6 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 27 0 3 1 0 1 1 0 8 0 uaddrrnd 24 863 0 838 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 863 0 838 1 0 1 1 0 8 0 vmmpekpl 168 12500 0 12445 3 0 3 3 0 8 0 vmmpepl 168 74895 0 72845 117 9 108 117 0 357 11 vmsppl 368 862 0 838 3 0 3 3 0 8 0 rwobjpl 24 27528 0 23477 26 1 25 25 0 8 0 pdppl 4096 1732 0 1676 124 62 62 68 0 8 6 pvpl 32 521598 0 505179 352 27 325 352 0 265 172 pmappl 216 862 0 838 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 763 0 109 19 0 19 19 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806820a7c8,ffff8000329d3258,ffff8000329d3288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000329d3228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff8000329d3228) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff8000329d3228,70f,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a6f82c0,ffffff9c,20000040,70e,0,ffff8000329d3400) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff8000329d3470) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4b51dc5470, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806820a7c8,ffff8000329d3258,ffff8000329d3288) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000329d3228) at vfs_lookup+0x6dc sys/kern/vfs_lookup.c:566 namei(ffff8000329d3228) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff8000329d3228,70f,0) at vn_open+0x17b sys/kern/vfs_vnops.c:107 doopenat(ffff80002a6f82c0,ffffff9c,20000040,70e,0,ffff8000329d3400) at doopenat+0x26e sys/kern/vfs_syscalls.c:1126 syscall(ffff8000329d3470) at syscall+0x543 sys/arch/amd64/amd64/trap.c:606 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe4b51dc5470, count: -8