uvm_fault(0xffffffff83aa4e68, 0xffff800028cb2004, 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 * 99262 59618 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a8a3aa0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff70072cf51e0,ffff80002a8a3b28,fffff70007ffd820,ffff80002a8a3b6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a8a3cb0,ffff80002a8a3c00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a3cb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a3cb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761fda7b6f70, 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(0xffffffff83aa4e68, 0xffff800028cb2004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a8a3aa0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff70072cf51e0,ffff80002a8a3b28,fffff70007ffd820,ffff80002a8a3b6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a8a3cb0,ffff80002a8a3c00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a3cb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a3cb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761fda7b6f70, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a8a3a90 rbx 0x200 rdx 0 rcx 0xfffff7006c6939d0 rax 0xffff800028cb2200 r8 0xffffffffffffffff r9 0x3 r10 0x7afcf824c65470fd r11 0x739ee795cf8aa0c1 r12 0 r13 0xffff80002a8a3b28 r14 0xffff800028cb2000 r15 0xffff800028cb2008 rip 0xffffffff820acabe ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a8a38e0 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=99262 pid=59618 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7362a0,0xffff8000314b1cb0 process=0xffff80002a79f610 user=0xffff80002a89e000, vmspace=0xfffff700770c0178 estcpu=36, cpticks=13, pctcpu=0.0, user=1, sys=12, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25964 366247 8846 0 2 0 syz-executor 25964 267260 8846 0 3 0x4000080 fsleep syz-executor 27496 5210 47235 0 2 0 syz-executor 27496 469005 47235 0 3 0x4000080 fsleep syz-executor 33502 429590 43785 0 2 0 syz-executor 33502 410128 43785 0 3 0x4000080 fsleep syz-executor 11797 187154 61843 0 2 0 syz-executor 11797 75326 61843 0 3 0x4000080 fsleep syz-executor 6020 255965 31262 0 3 0x81 nanoslp syz-executor 6020 516706 31262 0 2 0x4000001 syz-executor 6020 16088 31262 0 2 0x4000001 syz-executor 6020 21320 31262 0 3 0x4000081 fsleep syz-executor 5616 447974 81589 0 3 0x82 piperd syz-executor 43340 211162 1 0 3 0x80 nanoslp init 61843 518272 81589 0 2 0xc82 syz-executor *59618 99262 81589 0 7 0x2 syz-executor 31262 503379 81589 0 3 0x82 nanoslp syz-executor 47235 354319 81589 0 2 0xc82 syz-executor 84854 425489 81589 0 3 0x82 piperd syz-executor 43785 426808 81589 0 2 0xc82 syz-executor 8846 422200 81589 0 2 0xc82 syz-executor 81589 37588 96835 0 2 0x2 syz-executor 96835 416742 86395 0 3 0x10008a sigsusp ksh 86395 415039 82072 0 3 0x98 kqread sshd-session 82072 389531 34942 0 3 0x92 kqread sshd-session 34942 52257 1 0 3 0x88 kqread sshd 24744 18094 49007 73 3 0x1100090 kqread syslogd 49007 290475 1 0 3 0x100082 sbwait syslogd 14215 125003 1 0 3 0x100080 kqread resolvd 54080 442524 81321 77 3 0x100092 kqread dhcpleased 9449 346613 81321 77 3 0x100092 kqread dhcpleased 81321 271451 1 0 3 0x80 kqread dhcpleased 75730 497044 0 0 3 0x14200 bored smr 49484 304806 0 0 2 0x14200 zerothread 55115 244267 0 0 3 0x14200 aiodoned aiodoned 87786 339948 0 0 3 0x14200 syncer update 64111 516177 0 0 3 0x14200 cleaner cleaner 95573 472746 0 0 3 0x14200 reaper reaper 89487 383391 0 0 3 0x14200 pgdaemon pagedaemon 2960 486906 0 0 3 0x14200 bored viomb 65846 276241 0 0 3 0x40014200 acpi0 acpi0 49582 128274 0 0 3 0x14200 bored softnet0 40615 95176 0 0 3 0x14200 bored systqmp 68613 363927 0 0 3 0x14200 bored systq 40890 108302 0 0 3 0x40014200 tmoslp softclock 39026 24780 0 0 3 0x40014200 idle0 1 103865 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 11038 12135K 12501K 166960K 13463 0 pcb 17 12K 12K 166960K 159 0 rtable 179 8K 8K 166960K 526 0 pf 29 13K 19K 166960K 151 0 ifaddr 27 5K 7K 166960K 97 0 ifgroup 34 1K 2K 166960K 149 0 sysctl 3 1K 9K 166960K 10 0 counters 29 17K 17K 166960K 84 0 ioctlops 0 0K 4K 166960K 139 0 iov 0 0K 16K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1294 82K 82K 166960K 2136 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 28 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 85K 166960K 1378 0 sigio 0 0K 0K 166960K 20 0 proc 51 50K 83K 166960K 609 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 63 0 in_multi 59 4K 7K 166960K 167 0 ether_multi 1 0K 0K 166960K 15 0 mrt 0 0K 0K 166960K 48 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 448 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 195 146K 168K 166960K 12838 0 UVM aobj 5 2K 2K 166960K 6 0 pinsyscall 35 70K 90K 166960K 2555 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 76 0 NDP 8 0K 2K 166960K 69 0 temp 46 9112K 9174K 166960K 34691 0 kqueue 13 20K 29K 166960K 234 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 65 0 62 1 0 1 1 0 8 0 rtentry 136 161 0 90 4 0 4 4 0 8 0 unpcb 144 348 0 333 1 0 1 1 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 132 0 128 1 0 1 1 0 8 0 arp 96 25 0 15 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 1 1 0 1 1 0 8 0 inpcb 328 496 0 489 2 0 2 2 0 8 1 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 112 32 0 18 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 41 0 41 1 0 1 1 0 8 1 pppxif 1416 7 0 7 1 0 1 1 0 8 1 pfstscr 40 9 0 4 1 0 1 1 0 8 0 pfrktable 1344 7 0 3 1 0 1 1 0 8 0 pfanchor 1288 5 0 1 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 10 0 4 1 0 1 1 0 8 0 pfstate 384 5 0 2 1 0 1 1 0 8 0 pfrule 1360 11 0 9 1 0 1 1 0 8 0 rttmr 136 9 0 9 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 699 0 418 30 1 29 30 0 8 8 art_table 40 701 0 418 5 0 5 5 0 8 0 art_node 32 161 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 24 0 14 1 0 1 1 0 8 0 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 51 0 34 3 0 3 3 0 8 0 dino2pl 256 3643 0 2183 92 0 92 92 0 8 0 ffsino 256 3643 0 2183 92 0 92 92 0 8 0 nchpl 144 5179 0 3481 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 4096 0 0 228 0 228 228 0 8 0 namei 1024 14939 0 14939 2 0 2 2 0 8 2 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 95 0 80 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 20929 0 20929 8 0 8 8 1 8 8 plimitpl 152 253 0 236 1 0 1 1 0 8 0 sigapl 424 1676 0 1636 6 0 6 6 0 8 0 knotepl 120 48616 0 48569 37 27 10 17 0 8 8 kqueuepl 184 227 0 218 1 0 1 1 0 8 0 pipepl 304 148 0 121 3 0 3 3 0 8 0 fdescpl 448 1663 0 1636 4 0 4 4 0 8 0 filepl 120 5767 0 5556 7 0 7 7 0 8 0 lockfpl 104 324 0 322 1 0 1 1 0 8 0 lockfspl 48 143 0 141 1 0 1 1 0 8 0 sessionpl 144 71 0 63 1 0 1 1 0 8 0 pgrppl 48 84 0 68 1 0 1 1 0 8 0 ucredpl 104 1616 0 1603 1 0 1 1 0 8 0 zombiepl 144 1636 0 1636 1 0 1 1 0 8 1 processpl 1152 1676 0 1636 4 0 4 4 0 8 0 procpl 664 3076 0 3029 6 0 6 6 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 552 918 0 893 3 0 3 3 0 8 1 mcl64k 65536 365 0 365 1 0 1 1 0 8 1 mcl16k 16384 211 0 211 1 0 1 1 0 8 1 mcl12k 12288 108 0 108 1 0 1 1 0 8 1 mcl9k128 9344 46 0 46 1 0 1 1 0 8 1 mcl8k 8192 101 0 101 1 0 1 1 0 8 1 mcl4k 4096 4630 0 4573 13 0 13 13 0 8 5 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 642 0 642 2 0 2 2 0 8 2 mtagpl 96 23 0 15 1 0 1 1 0 8 0 mbufpl 256 17283 0 17152 17 0 17 17 0 8 4 bufpl 272 7845 0 1629 415 0 415 415 0 8 0 anonpl 24 207873 0 204940 57 0 57 57 0 186 30 amapchunkpl 152 43324 0 42934 32 0 32 32 0 158 13 amappl16 200 3496 0 3462 15 4 11 15 0 8 6 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 438 0 437 1 0 1 1 0 8 0 amappl13 176 125 0 116 1 0 1 1 0 8 0 amappl12 168 1930 0 1905 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 0 1 1 0 8 1 amappl10 152 57 0 47 1 0 1 1 0 8 0 amappl9 144 287 0 287 1 0 1 1 0 8 1 amappl8 136 103 0 102 1 0 1 1 0 8 0 amappl7 128 164 0 153 1 0 1 1 0 8 0 amappl6 120 170 0 169 1 0 1 1 0 8 0 amappl5 112 95 0 88 1 0 1 1 0 8 0 amappl4 104 270 0 255 1 0 1 1 0 8 0 amappl3 96 9192 0 9104 4 0 4 4 0 8 1 amappl2 88 555 0 504 2 0 2 2 0 8 0 amappl1 80 15933 0 15412 15 0 15 15 0 8 2 amappl 88 12032 0 11895 5 0 5 5 0 92 1 uvmvnodes 80 129 0 0 3 0 3 3 0 8 0 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 128 254 0 254 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 5 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1663 0 1636 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1663 0 1636 1 0 1 1 0 8 0 vmmpekpl 168 12597 0 12550 3 0 3 3 0 8 0 vmmpepl 168 107156 0 105522 92 0 92 92 0 357 13 vmsppl 368 1662 0 1636 4 0 4 4 0 8 1 rwobjpl 40 27714 0 26803 13 0 13 13 0 8 1 pdppl 4096 3332 0 3272 98 32 66 76 0 8 6 pvpl 32 781551 0 773582 143 0 143 143 0 265 52 pmappl 216 1662 0 1636 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 784 0 33 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a8a3aa0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff70072cf51e0,ffff80002a8a3b28,fffff70007ffd820,ffff80002a8a3b6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a8a3cb0,ffff80002a8a3c00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a3cb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a3cb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761fda7b6f70, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a8a3aa0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff70072cf51e0,ffff80002a8a3b28,fffff70007ffd820,ffff80002a8a3b6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a8a3cb0,ffff80002a8a3c00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a3cb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a3cb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x761fda7b6f70, count: -5