uvm_fault(0xffffffff83a41c50, 0xffff8000262c2004, 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 *377387 85653 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a84bcb0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffef80721007f0,ffff80002a84bd38,ffffef8007ffd618,ffff80002a84bd7c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a84bec0,ffff80002a84be10) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a84bec0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84bec0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b758338c10, 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(0xffffffff83a41c50, 0xffff8000262c2004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a84bcb0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffef80721007f0,ffff80002a84bd38,ffffef8007ffd618,ffff80002a84bd7c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a84bec0,ffff80002a84be10) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a84bec0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84bec0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b758338c10, count: -5 ddb> show registers rdi 0xa00 rsi 0x1000 __ALIGN_SIZE rbp 0xffff80002a84bca0 rbx 0xa00 rdx 0 rcx 0xffffffff83a34de8 cleancache+0x18 rax 0xffff8000262c2a00 r8 0xffffffffffffffff r9 0x3 r10 0x76f145764595d9d5 r11 0x724c068540347e63 r12 0 r13 0xffff80002a84bd38 r14 0xffff8000262c2000 r15 0xffff8000262c2008 rip 0xffffffff820ae20e ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a84baf0 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=377387 pid=85653 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=0xffff80002a736008,0xffff80002a736a78 process=0xffff80002a79d210 user=0xffff80002a846000, vmspace=0xffffef8071eb1008 estcpu=36, cpticks=8, pctcpu=0.1, user=0, sys=8, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 5623 342695 11131 0 3 0x80 nanoslp syz-executor 5623 514237 11131 0 3 0x4000080 kqread syz-executor 5623 377299 11131 0 3 0x4000080 fsleep syz-executor 85960 335271 1 0 3 0x100083 ttyin getty 11131 218918 69603 0 3 0x82 nanoslp syz-executor *85653 377387 69603 0 7 0x2 syz-executor 69603 378943 1 0 3 0x82 wait syz-executor 38998 404759 17692 0 3 0x98 kqread sshd-session 17692 163119 1 0 3 0x92 kqread sshd-session 13997 266112 1 73 3 0x1100090 kqread syslogd 13100 70924 0 0 3 0x14200 bored smr 76281 968 0 0 2 0x14200 zerothread 44066 177524 0 0 3 0x14200 aiodoned aiodoned 53537 24838 0 0 3 0x14200 syncer update 29350 79101 0 0 3 0x14200 cleaner cleaner 26870 327507 0 0 3 0x14200 reaper reaper 73015 363803 0 0 3 0x14200 pgdaemon pagedaemon 4357 265111 0 0 3 0x14200 bored viomb 90080 325399 0 0 3 0x40014200 acpi0 acpi0 53203 133842 0 0 3 0x14200 bored softnet0 21149 114739 0 0 3 0x14200 smrbar systqmp 60032 510578 0 0 3 0x14200 bored systq 36695 455925 0 0 3 0x40014200 tmoslp softclock 80415 435158 0 0 3 0x40014200 idle0 1 413209 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 11054 12110K 12537K 166960K 13026 0 pcb 17 12K 16K 166960K 266 0 rtable 175 8K 10K 166960K 523 0 pf 30 13K 18K 166960K 101 0 ifaddr 30 5K 7K 166960K 84 0 ifgroup 46 2K 2K 166960K 128 0 sysctl 4 1K 9K 166960K 15 0 counters 32 17K 18K 166960K 72 0 ioctlops 0 0K 4K 166960K 266 0 iov 0 0K 12K 166960K 32 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1355 85K 86K 166960K 1980 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 48 0 dirhash 15 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 10 33K 240K 166960K 870 0 sigio 0 0K 0K 166960K 10 0 proc 23 33K 75K 166960K 646 0 subproc 63 3K 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 82 0 in_multi 57 4K 7K 166960K 146 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 589 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 105 90K 166K 166960K 8990 0 UVM aobj 9 2K 2K 166960K 10 0 pinsyscall 18 36K 94K 166960K 2009 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 39 0 NDP 10 0K 2K 166960K 56 0 temp 64 9114K 9174K 166960K 27532 0 kqueue 7 11K 28K 166960K 140 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 76 0 76 2 1 1 1 0 8 1 rtentry 136 153 0 86 4 0 4 4 0 8 0 unpcb 144 525 0 517 7 1 6 6 0 8 5 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 321 0 319 10 3 7 7 0 8 6 arp 96 28 0 16 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 10 0 4 1 0 1 1 0 8 0 inpcb 328 874 0 870 10 3 7 7 0 8 6 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 112 33 0 21 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 10 0 3 1 0 1 1 0 8 0 ppxss 1072 28 0 28 2 1 1 1 0 8 1 pppxif 1416 5 0 5 2 1 1 1 0 8 1 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 2 1 1 0 1 0 8 0 pfstkey 128 4 0 4 1 1 0 1 0 8 0 pfstate 384 2 0 2 1 1 0 1 0 8 0 pfrule 1360 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 632 0 280 34 4 30 31 0 8 4 art_table 40 633 0 280 6 0 6 6 0 8 0 art_node 32 153 0 80 1 0 1 1 0 8 0 sysvmsgpl 40 56 0 48 1 0 1 1 0 8 0 semapl 72 45 0 35 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 29 0 10 3 0 3 3 0 8 0 dino2pl 256 2925 0 1467 93 0 93 93 0 8 0 ffsino 256 2925 0 1467 93 0 93 93 0 8 0 nchpl 144 4110 0 2413 64 0 64 64 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 vnodes 216 3320 0 0 185 0 185 185 0 8 0 namei 1024 13996 0 13996 3 2 1 2 0 8 1 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 kstatmem 264 73 0 52 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 17024 0 17024 15 7 8 8 1 8 8 plimitpl 152 251 0 237 1 0 1 1 0 8 0 sigapl 424 1145 0 1116 6 1 5 6 0 8 0 knotepl 120 28658 0 28630 24 14 10 16 0 8 8 kqueuepl 184 201 0 194 1 0 1 1 0 8 0 pipepl 304 187 0 160 4 0 4 4 0 8 1 fdescpl 448 1132 0 1117 5 1 4 5 0 8 0 filepl 120 6580 0 6417 13 1 12 12 0 8 5 lockfpl 104 332 0 332 2 1 1 1 0 8 1 lockfspl 48 121 0 121 2 1 1 1 0 8 1 sessionpl 144 55 0 50 1 0 1 1 0 8 0 pgrppl 48 74 0 61 1 0 1 1 0 8 0 ucredpl 104 1070 0 1063 1 0 1 1 0 8 0 zombiepl 144 1122 0 1116 2 1 1 1 0 8 0 processpl 1152 1145 0 1116 4 0 4 4 0 8 0 procpl 664 2157 0 2126 6 1 5 6 0 8 0 sosppl 176 7 0 7 2 1 1 1 0 8 1 sockpl 552 1606 0 1594 14 5 9 12 0 8 7 mcl64k 65536 47 0 47 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl9k128 9344 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 3458 0 3405 15 5 10 13 0 8 2 mcl2k 2048 730 0 728 5 1 4 4 0 8 3 mtagpl 96 5 0 5 2 1 1 1 0 8 1 mbufpl 256 10680 0 10593 16 0 16 16 0 8 1 bufpl 272 6809 0 593 415 0 415 415 0 8 0 anonpl 24 176808 0 175053 69 17 52 52 0 186 21 amapchunkpl 152 31259 0 31043 40 15 25 33 0 158 6 amappl16 200 2587 0 2570 18 6 12 15 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 432 0 432 2 1 1 1 0 8 1 amappl13 176 123 0 119 1 0 1 1 0 8 0 amappl12 168 1376 0 1362 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 60 0 58 1 0 1 1 0 8 0 amappl9 144 271 0 270 2 1 1 1 0 8 0 amappl8 136 101 0 101 2 1 1 1 0 8 1 amappl7 128 151 0 145 1 0 1 1 0 8 0 amappl6 120 168 0 168 1 0 1 1 0 8 1 amappl5 112 104 0 100 1 0 1 1 0 8 0 amappl4 104 271 0 263 1 0 1 1 0 8 0 amappl3 96 5960 0 5916 3 0 3 3 0 8 0 amappl2 88 555 0 530 2 0 2 2 0 8 0 amappl1 80 13368 0 13085 13 3 10 13 0 8 0 amappl 88 8098 0 8018 5 1 4 5 0 92 0 uvmvnodes 80 120 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 dma512 512 1 0 1 1 0 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1132 0 1117 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1132 0 1117 1 0 1 1 0 8 0 vmmpekpl 168 9973 0 9932 2 0 2 2 0 8 0 vmmpepl 168 77283 0 76429 88 21 67 81 0 357 8 vmsppl 368 1131 0 1117 4 1 3 4 0 8 0 rwobjpl 40 22114 0 21571 11 1 10 11 0 8 0 pdppl 4096 2270 0 2234 104 52 52 80 0 8 16 pvpl 32 500433 0 496058 136 28 108 108 0 265 29 pmappl 216 1131 0 1117 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 813 0 76 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a84bcb0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffef80721007f0,ffff80002a84bd38,ffffef8007ffd618,ffff80002a84bd7c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a84bec0,ffff80002a84be10) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a84bec0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84bec0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b758338c10, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a84bcb0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(ffffef80721007f0,ffff80002a84bd38,ffffef8007ffd618,ffff80002a84bd7c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a84bec0,ffff80002a84be10) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a84bec0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a84bec0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72b758338c10, count: -5