uvm_fault(0xffffffff83aa2070, 0xffff800028d92004, 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 *512397 15938 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a7ef1e0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066121d88,ffff80002a7ef268,fffffd8007ffd6e8,ffff80002a7ef2ac) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7674d0,ffff80002a7ef3f0,ffff80002a7ef340) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7ef3f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef3f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7915a80ec2d0, 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(0xffffffff83aa2070, 0xffff800028d92004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a7ef1e0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066121d88,ffff80002a7ef268,fffffd8007ffd6e8,ffff80002a7ef2ac) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7674d0,ffff80002a7ef3f0,ffff80002a7ef340) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7ef3f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef3f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7915a80ec2d0, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a7ef1d0 rbx 0x200 rdx 0 rcx 0 rax 0xffff800028d92200 r8 0xffffffffffffffff r9 0x3 r10 0x67660579521a28a9 r11 0xfe68abc0bed5e494 r12 0 r13 0xffff80002a7ef268 r14 0xffff800028d92000 r15 0xffff800028d92008 rip 0xffffffff8271aede ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a7ef020 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=512397 pid=15938 tcnt=1 stat=onproc flags process=2 proc=0 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a766010,0xffff80002a767778 process=0xffff80002a79c010 user=0xffff80002a7ea000, vmspace=0xfffffd807ec5ea10 estcpu=35, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16861 312406 33865 0 3 0x80 fsleep syz-executor 16861 327914 33865 0 3 0x4000080 fifor syz-executor 62337 246165 33484 0 3 0x80 fsleep syz-executor 62337 426836 33484 0 3 0x4000080 kqsel syz-executor 27501 49098 55512 0 3 0x80 fsleep syz-executor 27501 236021 55512 0 3 0x4000080 kqread syz-executor 33865 262367 74354 0 3 0x82 nanoslp syz-executor 55512 100987 74354 0 3 0x82 nanoslp syz-executor 33484 73855 74354 0 2 0x3 syz-executor *15938 512397 74354 0 7 0x2 syz-executor 74354 405311 69073 0 3 0x82 wait syz-executor 69073 361711 8871 0 3 0x10008a sigsusp ksh 8871 325571 17818 0 3 0x98 kqread sshd-session 17818 309733 1964 0 3 0x92 kqread sshd-session 93786 327125 1 0 3 0x100083 ttyin getty 1964 365884 1 0 3 0x88 kqread sshd 56431 13311 68510 73 3 0x1100090 kqread syslogd 68510 353443 1 0 3 0x100082 sbwait syslogd 72790 310732 1 0 3 0x100080 kqread resolvd 73922 297184 62425 77 3 0x100092 kqread dhcpleased 40281 39950 62425 77 3 0x100092 kqread dhcpleased 62425 128655 1 0 3 0x80 kqread dhcpleased 5798 149691 0 0 3 0x14200 bored smr 52374 335202 0 0 2 0x14200 zerothread 87850 342887 0 0 3 0x14200 aiodoned aiodoned 3502 109001 0 0 3 0x14200 syncer update 90558 226464 0 0 3 0x14200 cleaner cleaner 38451 408475 0 0 3 0x14200 reaper reaper 2309 362995 0 0 3 0x14200 pgdaemon pagedaemon 55436 6825 0 0 3 0x14200 bored viomb 95377 499364 0 0 3 0x40014200 acpi0 acpi0 20265 469657 0 0 3 0x14200 bored softnet0 2359 70671 0 0 3 0x14200 smrbar systqmp 50880 391357 0 0 3 0x14200 bored systq 73302 242227 0 0 3 0x40014200 tmoslp softclock 40785 102592 0 0 3 0x40014200 idle0 1 75200 0 0 3 0x80082 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 11039 12168K 12405K 166960K 12392 0 pcb 17 12K 12K 166960K 66 0 rtable 215 7K 8K 166960K 393 0 pf 29 12K 14K 166960K 64 0 ifaddr 36 6K 7K 166960K 62 0 ifgroup 46 2K 2K 166960K 89 0 sysctl 1 1K 9K 166960K 6 0 counters 32 17K 18K 166960K 55 0 ioctlops 0 0K 4K 166960K 128 0 iov 0 0K 17K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1302 82K 82K 166960K 1598 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 1K 166960K 17 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 41K 93K 166960K 375 0 sigio 0 0K 0K 166960K 10 0 proc 60 59K 108K 166960K 512 0 subproc 63 3K 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 22 0 in_multi 83 6K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 385 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 174 133K 158K 166960K 5030 0 UVM aobj 12 2K 2K 166960K 13 0 pinsyscall 33 66K 96K 166960K 1477 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 10 0K 2K 166960K 39 0 temp 40 9108K 9124K 166960K 21435 0 kqueue 14 22K 28K 166960K 76 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 48 0 45 1 0 1 1 0 8 0 rtentry 136 117 0 24 4 0 4 4 0 8 0 unpcb 144 141 0 124 1 0 1 1 0 8 0 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpcb 736 54 0 50 1 0 1 1 0 8 0 arp 96 18 0 2 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 328 224 0 217 3 1 2 2 0 8 1 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 112 25 0 5 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 8 0 1 1 0 1 1 0 8 0 ppxss 1072 17 0 17 2 1 1 1 0 8 1 pppxif 1416 7 0 7 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 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 478 0 46 29 0 29 29 0 8 0 art_table 40 480 0 46 5 0 5 5 0 8 0 art_node 32 117 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semapl 72 14 0 6 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2076 0 618 92 0 92 92 0 8 0 ffsino 256 2077 0 619 92 0 92 92 0 8 0 nchpl 144 2610 0 916 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2258 0 0 126 0 126 126 0 8 0 namei 1024 7880 0 7880 3 2 1 2 0 8 1 kstatmem 264 47 0 26 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 15415 0 15415 5 4 1 5 1 8 1 plimitpl 152 56 0 40 1 0 1 1 0 8 0 sigapl 424 670 0 632 6 1 5 6 0 8 0 knotepl 120 10658 0 10611 10 0 10 10 0 8 8 kqueuepl 184 89 0 78 1 0 1 1 0 8 0 pipepl 304 232 0 205 10 0 10 10 0 8 7 fdescpl 448 657 0 633 5 1 4 5 0 8 0 filepl 120 3206 0 3015 15 0 15 15 0 8 7 lockfpl 104 96 0 93 1 0 1 1 0 8 0 lockfspl 48 44 0 41 1 0 1 1 0 8 0 sessionpl 144 31 0 23 1 0 1 1 0 8 0 pgrppl 48 41 0 25 1 0 1 1 0 8 0 ucredpl 104 525 0 514 1 0 1 1 0 8 0 zombiepl 144 726 0 722 3 2 1 1 0 8 0 processpl 1152 670 0 632 4 0 4 4 0 8 0 procpl 664 1036 0 995 5 0 5 5 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 427 0 400 4 0 4 4 0 8 2 mcl64k 65536 16 0 15 2 1 1 1 0 8 0 mcl16k 16384 4 0 4 2 1 1 1 0 8 1 mcl9k128 9344 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 2 1 1 1 0 8 1 mcl4k 4096 2829 0 2767 16 8 8 16 0 8 0 mcl2k 2048 292 0 291 3 0 3 3 0 8 2 mtagpl 96 5 0 5 1 0 1 1 0 8 1 mbufpl 256 6667 0 6535 15 1 14 14 0 8 1 bufpl 280 6402 0 186 445 0 445 445 0 8 0 anonpl 24 140198 0 137433 79 35 44 44 0 186 15 amapchunkpl 152 16719 0 16393 44 11 33 33 0 158 15 amappl16 200 3132 0 3111 28 16 12 15 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 411 0 410 1 0 1 1 0 8 0 amappl13 176 150 0 140 1 0 1 1 0 8 0 amappl12 168 893 0 870 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 271 0 271 1 1 0 1 0 8 0 amappl8 136 112 0 111 1 0 1 1 0 8 0 amappl7 128 146 0 133 1 0 1 1 0 8 0 amappl6 120 149 0 148 1 0 1 1 0 8 0 amappl5 112 94 0 85 1 0 1 1 0 8 0 amappl4 104 271 0 256 1 0 1 1 0 8 0 amappl3 96 2961 0 2884 4 0 4 4 0 8 0 amappl2 88 524 0 471 2 0 2 2 0 8 0 amappl1 80 11009 0 10484 13 0 13 13 0 8 1 amappl 88 4299 0 4185 5 1 4 5 0 92 0 uvmvnodes 80 114 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 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 9 0 9 2 1 1 1 0 8 1 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 657 0 633 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 657 0 633 1 0 1 1 0 8 0 vmmpekpl 168 7299 0 7260 2 0 2 2 0 8 0 vmmpepl 168 51461 0 49962 95 6 89 89 0 357 8 vmsppl 368 656 0 633 4 1 3 4 0 8 0 rwobjpl 40 17839 0 16943 15 2 13 13 0 8 1 pdppl 4096 1320 0 1266 100 34 66 80 0 8 12 pvpl 32 337166 0 329222 174 52 122 122 0 265 34 pmappl 216 656 0 633 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 377 0 53 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a7ef1e0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066121d88,ffff80002a7ef268,fffffd8007ffd6e8,ffff80002a7ef2ac) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7674d0,ffff80002a7ef3f0,ffff80002a7ef340) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7ef3f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef3f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7915a80ec2d0, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a7ef1e0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066121d88,ffff80002a7ef268,fffffd8007ffd6e8,ffff80002a7ef2ac) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7674d0,ffff80002a7ef3f0,ffff80002a7ef340) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7ef3f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7ef3f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7915a80ec2d0, count: -5