uvm_fault(0xffffffff83a0a918, 0xffff800029922004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *269612 14114 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a859a50) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffee806c785b30,ffff80002a859ad8,ffffee8007ffd750,ffff80002a859b1c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a726008,ffff80002a859c60,ffff80002a859bb0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a859c60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a859c60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cce1ea96710, 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(0xffffffff83a0a918, 0xffff800029922004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a859a50) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffee806c785b30,ffff80002a859ad8,ffffee8007ffd750,ffff80002a859b1c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a726008,ffff80002a859c60,ffff80002a859bb0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a859c60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a859c60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cce1ea96710, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a859a40 rbx 0x200 rdx 0 rcx 0xffffee8068efcf28 rax 0xffff800029922200 r8 0xffffffffffffffff r9 0x3 r10 0x6b076563b20d382a r11 0x30fbb6e6d05c4fd6 r12 0 r13 0xffff80002a859ad8 r14 0xffff800029922000 r15 0xffff800029922008 rip 0xffffffff81276c2e ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a859890 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=269612 pid=14114 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a727230,0xffff80002a726548 process=0xffff80002a78db10 user=0xffff80002a854000, vmspace=0xffffee806ec89738 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 39199 447303 77646 0 2 0 syz-executor 39199 110470 77646 0 3 0x4000080 fsleep syz-executor 19287 83171 62012 0 2 0 syz-executor 19287 490863 62012 0 3 0x4000080 fsleep syz-executor 76875 209807 82652 0 2 0 syz-executor 76875 498863 82652 0 3 0x4000000 smrbar syz-executor 76875 227434 82652 0 3 0x4000080 fsleep syz-executor 16645 29879 44516 0 2 0 syz-executor 16645 15937 44516 0 3 0x4000080 fsleep syz-executor 16645 47955 44516 0 3 0x4000080 fsleep syz-executor 15295 298404 1 0 3 0x100083 ttyin getty 49445 39476 0 0 3 0x14280 nfsidl nfsio 14296 312083 0 0 3 0x14280 nfsidl nfsio 58635 466187 0 0 3 0x14280 nfsidl nfsio 55329 406274 0 0 3 0x14280 nfsidl nfsio 4924 320068 0 0 3 0x14280 nfsidl nfsio 98129 299301 0 0 3 0x14280 nfsidl nfsio 93550 341121 0 0 3 0x14280 nfsidl nfsio 45950 118777 0 0 3 0x14280 nfsidl nfsio 7637 180780 0 0 3 0x14280 nfsidl nfsio 45206 277586 0 0 3 0x14280 nfsidl nfsio 94463 472555 0 0 3 0x14280 nfsidl nfsio 15923 502974 0 0 3 0x14280 nfsidl nfsio 41402 1206 0 0 3 0x14280 nfsidl nfsio 44125 25177 0 0 3 0x14280 nfsidl nfsio 81578 498947 0 0 3 0x14280 nfsidl nfsio 32183 391544 0 0 3 0x14280 nfsidl nfsio 77806 499659 0 0 3 0x14280 nfsidl nfsio 81837 331758 0 0 3 0x14280 nfsidl nfsio 31018 485151 0 0 3 0x14280 nfsidl nfsio 54627 486849 0 0 3 0x14280 nfsidl nfsio 77646 390785 52999 0 2 0xc82 syz-executor 44516 42685 52999 0 3 0x82 nanoslp syz-executor *14114 269612 52999 0 7 0x2 syz-executor 62012 454030 52999 0 3 0x82 nanoslp syz-executor 68272 423214 52999 0 3 0x82 nanoslp syz-executor 82652 72707 52999 0 2 0xc82 syz-executor 52999 158788 42523 0 3 0x82 wait syz-executor 42523 11440 42794 0 3 0x10008a sigsusp ksh 42794 415092 50781 0 3 0x98 kqread sshd-session 50781 74216 57627 0 3 0x92 kqread sshd-session 57627 113279 1 0 3 0x88 kqread sshd 22444 366969 95469 73 3 0x1100090 kqread syslogd 95469 269672 1 0 3 0x100082 sbwait syslogd 60649 351758 1 0 3 0x100080 kqread resolvd 20905 24014 76021 77 3 0x100092 kqread dhcpleased 98416 268073 76021 77 3 0x100092 kqread dhcpleased 76021 291342 1 0 3 0x80 kqread dhcpleased 60156 342520 0 0 3 0x14200 bored smr 54983 328869 0 0 2 0x14200 zerothread 23667 272736 0 0 3 0x14200 aiodoned aiodoned 30007 45811 0 0 3 0x14200 syncer update 49721 439396 0 0 3 0x14200 cleaner cleaner 18340 157080 0 0 3 0x14200 reaper reaper 91314 379675 0 0 3 0x14200 pgdaemon pagedaemon 49228 447022 0 0 3 0x14200 bored viomb 54021 68407 0 0 3 0x40014200 acpi0 acpi0 20557 196389 0 0 3 0x14200 bored softnet0 14056 204188 0 0 3 0x14200 smrbar systqmp 80213 499366 0 0 3 0x14200 bored systq 62945 94775 0 0 3 0x40014200 tmoslp softclock 71461 307875 0 0 3 0x40014200 idle0 1 40370 0 0 3 0x80082 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 11043 12241K 12497K 166960K 12717 0 pcb 17 14K 18K 166960K 195 0 rtable 284 11K 12K 166960K 571 0 pf 37 14K 94K 166960K 117 0 ifaddr 44 7K 7K 166960K 65 0 ifgroup 51 2K 2K 166960K 101 0 sysctl 4 1K 9K 166960K 73 0 counters 35 18K 18K 166960K 89 0 ioctlops 0 0K 4K 166960K 133 0 iov 0 0K 12K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1371 86K 87K 166960K 1770 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 25 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 97K 166960K 459 0 sigio 0 0K 0K 166960K 3 0 proc 60 59K 100K 166960K 560 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 0 0K 0K 166960K 107 0 in_multi 99 7K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 407 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 206 150K 168K 166960K 5837 0 UVM aobj 16 2K 2K 166960K 17 0 pinsyscall 36 72K 96K 166960K 1573 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 13 0K 2K 166960K 44 0 temp 41 9111K 9183K 166960K 19490 0 kqueue 13 20K 27K 166960K 94 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 93 0 90 2 0 2 2 0 8 1 rtentry 136 158 0 43 5 0 5 5 0 8 1 unpcb 144 193 0 178 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 180 0 173 7 0 7 7 0 8 6 arp 96 20 0 1 1 0 1 1 0 8 0 inpcb 328 561 0 548 9 0 9 9 0 8 7 ip6q 72 3 0 2 1 0 1 1 0 8 0 ip6af 40 7 0 5 1 0 1 1 0 8 0 nd6 112 28 0 2 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 49 0 47 1 0 1 1 0 8 0 pppxif 1416 3 0 3 1 0 1 1 0 8 1 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 7 0 5 1 0 1 1 0 8 0 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 7 0 1 1 0 1 1 0 8 0 pftag 88 4 0 4 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 7 0 3 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 496 0 40 31 0 31 31 0 8 1 art_table 40 500 0 40 5 0 5 5 0 8 0 art_node 32 158 0 52 2 0 2 2 0 8 1 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 21 0 11 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 2237 0 779 92 0 92 92 0 8 0 ffsino 256 2237 0 779 92 0 92 92 0 8 0 nchpl 144 2873 0 1172 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2556 0 0 142 0 142 142 0 8 0 namei 1024 9339 0 9339 2 0 2 2 0 8 2 pfiaddrpl 120 3 0 1 1 0 1 1 0 8 0 kstatmem 264 55 0 28 3 0 3 3 0 8 1 scsiplug 72 8 0 8 1 0 1 1 0 8 1 scxspl 216 13812 0 13812 8 0 8 8 1 8 8 plimitpl 152 142 0 125 1 0 1 1 0 8 0 sigapl 424 778 0 718 8 0 8 8 0 8 0 knotepl 120 22714 0 22667 10 0 10 10 0 8 8 kqueuepl 184 111 0 102 1 0 1 1 0 8 0 pipepl 304 138 0 111 3 0 3 3 0 8 0 fdescpl 448 744 0 717 5 0 5 5 0 8 1 filepl 120 4077 0 3858 10 0 10 10 0 8 2 lockfpl 104 254 0 251 2 0 2 2 0 8 1 lockfspl 48 119 0 116 1 0 1 1 0 8 0 sessionpl 144 36 0 28 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 603 0 592 1 0 1 1 0 8 0 zombiepl 144 721 0 718 1 0 1 1 0 8 0 processpl 1152 778 0 718 5 0 5 5 0 8 0 procpl 664 1280 0 1214 7 0 7 7 0 8 0 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 552 922 0 891 10 0 10 10 0 8 7 mcl64k 65536 84 0 83 1 0 1 1 0 8 0 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl9k128 9344 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 7 0 6 1 0 1 1 0 8 0 mcl4k 4096 2951 0 2900 15 0 15 15 0 8 8 mcl2k 2048 378 0 378 2 0 2 2 0 8 2 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 7853 0 7717 17 0 17 17 0 8 3 bufpl 272 6375 0 160 415 0 415 415 0 8 0 anonpl 24 126064 0 122819 67 0 67 67 0 88 27 amapchunkpl 152 17931 0 17525 28 0 28 28 0 158 7 amappl16 200 2388 0 2352 28 15 13 26 0 8 8 amappl15 192 18 0 18 1 0 1 1 0 8 1 amappl14 184 426 0 425 1 0 1 1 0 8 0 amappl13 176 118 0 108 1 0 1 1 0 8 0 amappl12 168 980 0 953 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 0 1 1 0 8 1 amappl10 152 77 0 66 1 0 1 1 0 8 0 amappl9 144 267 0 267 1 0 1 1 0 8 1 amappl8 136 149 0 148 1 0 1 1 0 8 0 amappl7 128 145 0 134 1 0 1 1 0 8 0 amappl6 120 151 0 149 1 0 1 1 0 8 0 amappl5 112 97 0 89 1 0 1 1 0 8 0 amappl4 104 272 0 253 1 0 1 1 0 8 0 amappl3 96 3512 0 3418 4 0 4 4 0 8 0 amappl2 88 542 0 487 2 0 2 2 0 8 0 amappl1 80 12082 0 11542 15 0 15 15 0 8 2 amappl 88 5051 0 4909 5 0 5 5 0 92 1 uvmvnodes 80 109 0 0 3 0 3 3 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 16 0 1 1 0 1 1 0 8 0 uaddrrnd 24 744 0 717 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 744 0 717 1 0 1 1 0 8 0 vmmpekpl 168 7800 0 7767 2 0 2 2 0 8 0 vmmpepl 168 55924 0 54246 101 0 101 101 0 357 13 vmsppl 368 743 0 717 4 0 4 4 0 8 1 rwobjpl 40 18492 0 17536 15 0 15 15 0 8 1 pdppl 4096 1494 0 1434 100 32 68 82 0 8 8 pvpl 32 345565 0 335952 139 0 139 139 0 265 41 pmappl 216 743 0 717 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 798 0 32 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a859a50) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffee806c785b30,ffff80002a859ad8,ffffee8007ffd750,ffff80002a859b1c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a726008,ffff80002a859c60,ffff80002a859bb0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a859c60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a859c60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cce1ea96710, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a859a50) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffee806c785b30,ffff80002a859ad8,ffffee8007ffd750,ffff80002a859b1c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a726008,ffff80002a859c60,ffff80002a859bb0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a859c60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a859c60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cce1ea96710, count: -5