uvm_fault(0xffffffff83a8b6b0, 0xffff8000295a2004, 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 *522968 74699 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a7f1240) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066687da0,ffff80002a7f12c8,fffffd8007ffd7b8,ffff80002a7f130c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7787d8,ffff80002a7f1450,ffff80002a7f13a0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7f1450) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7f1450) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76f90ed86430, 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(0xffffffff83a8b6b0, 0xffff8000295a2004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a7f1240) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066687da0,ffff80002a7f12c8,fffffd8007ffd7b8,ffff80002a7f130c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7787d8,ffff80002a7f1450,ffff80002a7f13a0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7f1450) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7f1450) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76f90ed86430, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a7f1230 rbx 0x200 rdx 0 rcx 0xfffffd8062af9d20 rax 0xffff8000295a2200 r8 0xffffffffffffffff r9 0x2 r10 0x3d20a5f2a24e81b1 r11 0x48324cea99d252d5 r12 0 r13 0xffff80002a7f12c8 r14 0xffff8000295a2000 r15 0xffff8000295a2008 rip 0xffffffff83239bae ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a7f1080 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=522968 pid=74699 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=0xffff80002a778d08,0xffff80002a779a10 process=0xffff80002a780490 user=0xffff80002a7ec000, vmspace=0xfffffd807ec59e60 estcpu=36, cpticks=19, pctcpu=0.1, user=2, sys=17, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 40843 442120 61717 0 2 0 syz-executor 40843 483757 61717 0 3 0x4000080 fsleep syz-executor 25087 293917 30349 0 2 0 syz-executor 25087 236775 30349 0 3 0x4000080 kqread syz-executor 92865 214300 20435 0 3 0x80 nanoslp syz-executor 92865 431044 20435 0 3 0x4000080 sbwait syz-executor 92865 295791 20435 0 3 0x4000080 fsleep syz-executor 18188 465833 36409 0 3 0x81 nanoslp syz-executor 18188 254297 36409 0 3 0x4000081 fifor syz-executor 18188 424265 36409 0 3 0x4000081 fsleep syz-executor 78879 152886 73346 0 3 0x80 nanoslp syz-executor 78879 5534 73346 0 3 0x4000080 lockf syz-executor 78879 478158 73346 0 3 0x4000080 fsleep syz-executor 61717 384121 91148 0 3 0x82 nanoslp syz-executor 93785 33187 0 0 3 0x14200 acct acct 93097 311917 0 0 3 0x14280 nfsidl nfsio 38981 177228 0 0 3 0x14280 nfsidl nfsio 48805 376308 0 0 3 0x14280 nfsidl nfsio 71652 118451 0 0 3 0x14280 nfsidl nfsio 36097 96102 0 0 3 0x14280 nfsidl nfsio 59735 69387 0 0 3 0x14280 nfsidl nfsio 32037 238549 0 0 3 0x14280 nfsidl nfsio 23504 161744 0 0 3 0x14280 nfsidl nfsio 24500 71361 0 0 3 0x14280 nfsidl nfsio 62795 248521 0 0 3 0x14280 nfsidl nfsio 76819 252178 0 0 3 0x14280 nfsidl nfsio 85215 64280 0 0 3 0x14280 nfsidl nfsio 81989 201678 0 0 3 0x14280 nfsidl nfsio 86161 522454 0 0 3 0x14280 nfsidl nfsio 19022 413726 0 0 3 0x14280 nfsidl nfsio 63767 263011 0 0 3 0x14280 nfsidl nfsio 869 144961 0 0 3 0x14280 nfsidl nfsio 54074 106808 0 0 3 0x14280 nfsidl nfsio 10125 400907 0 0 3 0x14280 nfsidl nfsio 23500 302201 0 0 3 0x14280 nfsidl nfsio 94892 306334 91148 0 3 0x82 nanoslp syz-executor 85688 359959 91148 0 3 0x82 wait syz-executor 30349 165983 91148 0 3 0x82 nanoslp syz-executor 73346 164386 91148 0 3 0x82 nanoslp syz-executor 36409 302431 91148 0 3 0x82 nanoslp syz-executor *74699 522968 91148 0 7 0x2 syz-executor 20435 276276 91148 0 3 0x82 nanoslp syz-executor 91148 26160 89744 0 2 0x2 syz-executor 89744 348770 42684 0 3 0x10008a sigsusp ksh 42684 78630 44163 0 3 0x98 kqread sshd-session 44163 95344 64536 0 3 0x92 kqread sshd-session 85724 416612 1 0 3 0x100083 ttyin getty 64536 24665 1 0 3 0x88 kqread sshd 8119 85761 8190 73 3 0x1100090 kqread syslogd 8190 185199 1 0 3 0x100082 sbwait syslogd 61133 277618 1 0 3 0x100080 kqread resolvd 44340 387887 7831 77 3 0x100092 kqread dhcpleased 61648 254644 7831 77 3 0x100092 kqread dhcpleased 7831 471178 1 0 3 0x80 kqread dhcpleased 61249 419047 0 0 3 0x14200 bored smr 72926 281716 0 0 2 0x14200 zerothread 35117 32985 0 0 3 0x14200 aiodoned aiodoned 93432 122105 0 0 3 0x14200 syncer update 58102 79816 0 0 3 0x14200 cleaner cleaner 11575 192991 0 0 3 0x14200 reaper reaper 32517 515685 0 0 3 0x14200 pgdaemon pagedaemon 71711 74465 0 0 3 0x14200 bored viomb 30611 197575 0 0 3 0x40014200 acpi0 acpi0 31233 66771 0 0 3 0x14200 bored softnet0 71565 32149 0 0 3 0x14200 bored systqmp 90190 114945 0 0 3 0x14200 bored systq 42777 218845 0 0 3 0x40014200 tmoslp softclock 39104 213093 0 0 3 0x40014200 idle0 1 394305 0 0 3 0x82 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 11071 12107K 12713K 166960K 14501 0 pcb 20 17K 19K 166960K 421 0 rtable 209 8K 9K 166960K 527 0 pf 42 15K 74K 166960K 218 0 ifaddr 39 6K 7K 166960K 105 0 ifgroup 55 2K 2K 166960K 187 0 sysctl 4 1K 9K 166960K 78 0 counters 34 17K 18K 166960K 89 0 ioctlops 0 0K 4K 166960K 333 0 iov 0 0K 16K 166960K 185 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1449 91K 91K 166960K 2555 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 62 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 1261 0 sigio 0 0K 0K 166960K 13 0 proc 65 67K 124K 166960K 673 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 249 0 in_multi 77 5K 7K 166960K 160 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 36 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 2K 166960K 518 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 223 143K 161K 166960K 12999 0 UVM aobj 93 3K 3K 166960K 95 0 pinsyscall 38 76K 96K 166960K 2403 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 52 0 NDP 12 0K 2K 166960K 73 0 temp 74 9116K 9186K 166960K 44161 0 kqueue 18 27K 32K 166960K 271 0 SYN cache 2 16K 24K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 166 0 162 3 2 1 3 0 8 0 rtentry 136 153 0 69 4 0 4 4 0 8 0 unpcb 144 724 0 705 7 6 1 6 0 8 0 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpcb 736 477 0 473 10 9 1 7 0 8 0 arp 96 23 0 9 1 0 1 1 0 8 0 inpcb 328 1354 0 1345 20 13 7 10 0 8 6 nd6 112 34 0 17 1 0 1 1 0 8 0 pkpcb 40 13 0 12 3 2 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1072 36 0 36 1 0 1 1 0 8 1 pppxif 1416 6 0 6 2 2 0 1 0 8 0 pfstscr 40 75 0 71 3 2 1 1 0 8 0 pffrag 232 13 0 1 1 0 1 1 0 482 0 pffrnode 88 10 0 1 1 0 1 1 0 8 0 pffrent 40 83 0 71 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 8 0 6 2 1 1 1 0 8 0 pfsrclim 320 2 0 2 2 2 0 1 0 8 0 pfanchor 1288 9 0 2 1 0 1 1 0 8 0 pftag 88 7 0 2 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfstitem 24 6 0 2 1 0 1 1 0 8 0 pfstkey 128 76 0 72 3 2 1 1 0 8 0 pfstate 384 38 0 36 3 2 1 1 0 8 0 pfrule 1360 17 0 15 2 1 1 1 0 8 0 rttmr 136 5 0 5 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 763 0 410 31 5 26 30 0 8 1 art_table 40 764 0 410 5 0 5 5 0 8 0 art_node 32 152 0 76 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 12 1 0 1 1 0 8 0 semupl 112 4 0 4 2 1 1 1 0 8 1 semapl 72 55 0 45 1 0 1 1 0 8 0 shmpl 112 92 0 2 3 0 3 3 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3713 0 2252 92 0 92 92 0 8 0 ffsino 256 3713 0 2252 92 0 92 92 0 8 0 nchpl 144 5479 0 3774 64 0 64 64 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 vnodes 216 4540 0 0 253 0 253 253 0 8 0 namei 1024 20363 0 20363 4 3 1 2 0 8 1 pfiaddrpl 120 2 0 1 2 1 1 1 0 8 0 kstatmem 264 107 0 82 2 0 2 2 0 8 0 scsiplug 72 3 0 3 3 2 1 1 0 8 1 scxspl 216 21956 0 21956 11 9 2 8 1 8 2 plimitpl 152 210 0 193 1 0 1 1 0 8 0 sigapl 424 1572 0 1509 9 1 8 8 0 8 0 knotepl 120 56595 0 56544 32 23 9 17 0 8 7 kqueuepl 184 567 0 553 8 5 3 4 0 8 2 pipepl 304 210 0 181 3 0 3 3 0 8 0 fdescpl 448 1536 0 1507 5 1 4 5 0 8 0 filepl 120 10235 0 9999 21 11 10 13 0 8 2 lockfpl 104 894 0 890 3 2 1 2 0 8 0 lockfspl 48 238 0 235 1 0 1 1 0 8 0 sessionpl 144 68 0 59 1 0 1 1 0 8 0 pgrppl 48 86 0 69 1 0 1 1 0 8 0 ucredpl 104 1895 0 1884 1 0 1 1 0 8 0 zombiepl 144 1782 0 1780 2 1 1 1 0 8 0 processpl 1152 1572 0 1509 5 0 5 5 0 8 0 procpl 664 3370 0 3299 8 0 8 8 0 8 0 sosppl 176 5 0 5 2 1 1 1 0 8 1 sockpl 552 2302 0 2268 23 15 8 12 0 8 5 mcl64k 65536 93 0 91 2 1 1 1 0 8 0 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 3 0 3 2 2 0 1 0 8 0 mcl9k128 9344 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 47 0 46 2 1 1 1 0 8 0 mcl4k 4096 4090 0 4034 16 7 9 14 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 1150 0 1112 8 1 7 7 0 8 2 mtagpl 96 53 0 14 2 0 2 2 0 8 0 mbufpl 256 15810 0 15640 35 21 14 28 0 8 0 bufpl 280 7245 0 1029 445 0 445 445 0 8 0 anonpl 24 208901 0 205601 87 52 35 61 0 186 6 amapchunkpl 152 43116 0 42632 50 18 32 32 0 158 12 amappl16 200 3619 0 3583 35 31 4 20 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 430 0 428 1 0 1 1 0 8 0 amappl13 176 117 0 107 1 0 1 1 0 8 0 amappl12 168 1779 0 1751 2 0 2 2 0 8 0 amappl11 160 55 0 55 1 1 0 1 0 8 0 amappl10 152 68 0 58 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 105 0 104 1 0 1 1 0 8 0 amappl7 128 146 0 134 1 0 1 1 0 8 0 amappl6 120 167 0 165 1 0 1 1 0 8 0 amappl5 112 91 0 83 1 0 1 1 0 8 0 amappl4 104 276 0 259 1 0 1 1 0 8 0 amappl3 96 8924 0 8810 4 0 4 4 0 8 0 amappl2 88 547 0 489 2 0 2 2 0 8 0 amappl1 80 14736 0 14179 14 1 13 13 0 8 0 amappl 88 12063 0 11902 5 0 5 5 0 92 0 uvmvnodes 80 142 0 0 3 0 3 3 0 8 0 dma8192 8192 1 0 1 1 1 0 1 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 128 255 0 255 2 2 0 1 0 8 0 dma64 64 7 0 7 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 22 0 21 1 0 1 1 0 8 0 aobjpl 72 94 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1536 0 1507 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1536 0 1507 1 0 1 1 0 8 0 vmmpekpl 168 13562 0 13514 3 0 3 3 0 8 0 vmmpepl 168 101257 0 99441 98 13 85 96 0 357 0 vmsppl 368 1535 0 1507 4 1 3 4 0 8 0 rwobjpl 40 27649 0 26541 16 2 14 15 0 8 0 pdppl 4096 3078 0 3014 114 48 66 82 0 8 2 pvpl 32 650896 0 641568 204 92 112 154 0 265 17 pmappl 216 1535 0 1507 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 429 0 105 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a7f1240) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066687da0,ffff80002a7f12c8,fffffd8007ffd7b8,ffff80002a7f130c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7787d8,ffff80002a7f1450,ffff80002a7f13a0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7f1450) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7f1450) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76f90ed86430, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a7f1240) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd8066687da0,ffff80002a7f12c8,fffffd8007ffd7b8,ffff80002a7f130c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7787d8,ffff80002a7f1450,ffff80002a7f13a0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a7f1450) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7f1450) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76f90ed86430, count: -5