login: uvm_fault(0xffffffff83aee2d0, 0xffff800027332004, 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 *447554 40617 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a887780) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806b953130,ffff80002a887808,fffffd8007ffd680,ffff80002a88784c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a887990,ffff80002a8878e0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3220 syscall(ffff80002a887990) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a887990) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e6b14522d60, 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(0xffffffff83aee2d0, 0xffff800027332004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a887780) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806b953130,ffff80002a887808,fffffd8007ffd680,ffff80002a88784c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a887990,ffff80002a8878e0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3220 syscall(ffff80002a887990) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a887990) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e6b14522d60, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a887770 rbx 0x200 rdx 0 rcx 0xfffffd8068d42b18 rax 0xffff800027332200 r8 0xffffffffffffffff r9 0x2 r10 0xba3d7fbd2c032fc4 r11 0xe624e2916d762545 r12 0 r13 0xffff80002a887808 r14 0xffff800027332000 r15 0xffff800027332008 rip 0xffffffff81d3375e ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a8875c0 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=447554 pid=40617 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=0xffff80002a736008,0xffff80002a7362b0 process=0xffff80002a79f610 user=0xffff80002a882000, vmspace=0xfffffd8071b5a008 estcpu=36, cpticks=10, pctcpu=0.0, user=0, sys=9, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 64298 326416 92524 0 2 0 syz-executor 64298 264292 92524 0 3 0x4000080 fsleep syz-executor 66806 110380 20293 0 2 0 syz-executor 66806 31210 20293 0 3 0x4000080 fsleep syz-executor 5676 245513 75057 0 2 0x10 syz-executor 5676 370742 75057 0 3 0x4000090 fsleep syz-executor 23222 160755 55773 0 2 0 syz-executor 23222 146893 55773 0 3 0x4000080 fsleep syz-executor 23222 91859 55773 0 3 0x4000080 fsleep syz-executor 34322 451160 35685 0 2 0 syz-executor 34322 358957 35685 0 3 0x4000080 fsleep syz-executor 20017 456202 53835 0 2 0x100002 sh 61688 145463 64599 0 2 0 syz-executor 61688 87232 64599 0 2 0x4000000 syz-executor 53835 175076 65989 0 3 0x82 wait syz-executor 75057 81948 65989 0 3 0x82 nanoslp syz-executor 35310 77929 1 0 3 0x100083 ttyin getty 91306 270898 0 0 3 0x14280 nfsidl nfsio 90594 318162 0 0 3 0x14280 nfsidl nfsio 98852 150667 0 0 3 0x14280 nfsidl nfsio 13844 108194 0 0 3 0x14280 nfsidl nfsio 23987 97739 0 0 3 0x14280 nfsidl nfsio 67996 209148 0 0 3 0x14280 nfsidl nfsio 78706 13882 0 0 3 0x14280 nfsidl nfsio 81425 320304 0 0 3 0x14280 nfsidl nfsio 17716 461829 0 0 3 0x14280 nfsidl nfsio 24850 145690 0 0 3 0x14280 nfsidl nfsio 66287 275040 0 0 3 0x14280 nfsidl nfsio 37557 110169 0 0 3 0x14280 nfsidl nfsio 74984 208152 0 0 3 0x14280 nfsidl nfsio 75152 331739 0 0 3 0x14280 nfsidl nfsio 32871 136694 0 0 3 0x14280 nfsidl nfsio 24455 62391 0 0 3 0x14280 nfsidl nfsio 54425 411529 0 0 3 0x14280 nfsidl nfsio 50134 158812 0 0 3 0x14280 nfsidl nfsio 40008 400585 0 0 3 0x14280 nfsidl nfsio 28765 49419 0 0 3 0x14280 nfsidl nfsio 92524 250082 65989 0 3 0x82 nanoslp syz-executor 64599 298561 65989 0 3 0x82 nanoslp syz-executor *40617 447554 65989 0 7 0x2 syz-executor 55773 294374 65989 0 3 0x82 nanoslp syz-executor 20293 339911 65989 0 3 0x82 nanoslp syz-executor 35685 422141 65989 0 3 0x82 nanoslp syz-executor 65989 168352 1 0 2 0x2 syz-executor 79053 161686 1 0 3 0x1000008a kqread sshd 31054 152237 35804 73 3 0x1100090 kqread syslogd 35804 118074 1 0 3 0x100082 sbwait syslogd 60919 135180 1 0 3 0x100080 kqread resolvd 67061 369063 26936 77 3 0x100092 kqread dhcpleased 87486 125250 26936 77 3 0x100092 kqread dhcpleased 26936 71786 1 0 3 0x80 kqread dhcpleased 81789 69008 0 0 3 0x14200 bored smr 76607 218011 0 0 2 0x14200 zerothread 71815 461004 0 0 3 0x14200 aiodoned aiodoned 66396 457378 0 0 3 0x14200 syncer update 3250 311834 0 0 3 0x14200 cleaner cleaner 62077 39556 0 0 3 0x14200 reaper reaper 83664 56976 0 0 3 0x14200 pgdaemon pagedaemon 7124 444692 0 0 3 0x14200 bored viomb 80587 142271 0 0 3 0x40014200 acpi0 acpi0 96480 467169 0 0 3 0x14200 bored softnet0 16142 304543 0 0 3 0x14200 smrbar systqmp 39976 197001 0 0 3 0x14200 bored systq 54611 415776 0 0 3 0x40014200 tmoslp softclock 15735 260024 0 0 3 0x40014200 idle0 1 9847 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 11042 12170K 12387K 166960K 12741 0 pcb 17 12K 12K 166960K 110 0 rtable 220 8K 9K 166960K 1212 0 pf 33 13K 72K 166960K 109 0 ifaddr 37 6K 7K 166960K 116 0 ifgroup 51 2K 2K 166960K 148 0 sysctl 4 1K 9K 166960K 11 0 counters 33 17K 18K 166960K 104 0 ioctlops 0 0K 4K 166960K 328 0 iov 0 0K 12K 166960K 86 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1349 85K 85K 166960K 1943 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 41 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 818 0 sigio 0 0K 0K 166960K 8 0 proc 60 59K 108K 166960K 852 0 subproc 72 4K 4K 166960K 171 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 55 0 in_multi 83 6K 7K 166960K 243 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 25 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 566 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 194 138K 158K 166960K 8663 0 UVM aobj 77 3K 4K 166960K 80 0 pinsyscall 33 66K 93K 166960K 2212 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 14 0K 2K 166960K 79 0 temp 54 9110K 9172K 166960K 41779 0 kqueue 11 16K 32K 166960K 124 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 120 161 0 158 3 0 3 3 0 8 2 rtentry 136 439 0 347 4 0 4 4 0 8 0 unpcb 144 409 0 395 4 0 4 4 0 8 3 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpcb 736 222 0 219 4 0 4 4 0 8 3 arp 96 105 0 90 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 4 0 2 1 0 1 1 0 8 0 inpcb 328 601 0 594 4 0 4 4 0 8 2 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 112 61 0 42 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1072 53 0 53 2 1 1 1 0 8 1 pppxif 1416 36 0 36 1 1 0 1 0 8 0 pfstscr 40 4 0 2 1 0 1 1 0 8 0 pfrktable 1344 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 pfrule 1360 1 0 1 1 1 0 1 0 8 0 rttmr 136 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 1343 0 895 45 11 34 44 0 8 6 art_table 40 1344 0 895 7 0 7 7 0 8 1 art_node 32 439 0 349 3 0 3 3 0 8 1 sysvmsgpl 40 14 0 6 1 0 1 1 0 8 0 semapl 72 37 0 27 1 0 1 1 0 8 0 shmpl 112 77 0 3 3 0 3 3 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2624 0 1150 93 0 93 93 0 8 0 ffsino 256 2624 0 1150 93 0 93 93 0 8 0 nchpl 144 3561 0 1835 65 0 65 65 0 8 0 rtmask 32 5 0 5 2 1 1 1 0 8 1 vnodes 216 3023 0 0 168 0 168 168 0 8 0 namei 1024 12920 0 12920 1 0 1 1 0 8 1 kstatmem 264 81 0 58 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 14364 0 14364 10 2 8 8 1 8 8 plimitpl 152 288 0 273 1 0 1 1 0 8 0 sigapl 424 1114 0 1054 9 1 8 8 0 8 1 knotepl 120 24865 0 24823 10 0 10 10 0 8 7 kqueuepl 184 172 0 164 1 0 1 1 0 8 0 pipepl 304 227 0 200 3 0 3 3 0 8 0 fdescpl 448 1080 0 1054 5 1 4 5 0 8 0 filepl 120 5985 0 5777 13 1 12 12 0 8 5 lockfpl 104 251 0 248 1 0 1 1 0 8 0 lockfspl 48 83 0 80 1 0 1 1 0 8 0 sessionpl 144 158 0 150 1 0 1 1 0 8 0 pgrppl 48 185 0 169 1 0 1 1 0 8 0 ucredpl 104 852 0 840 1 0 1 1 0 8 0 zombiepl 144 1301 0 1300 2 1 1 1 0 8 0 processpl 1152 1114 0 1054 5 0 5 5 0 8 0 procpl 664 2013 0 1946 7 0 7 7 0 8 1 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 552 1291 0 1267 9 1 8 8 0 8 6 mcl64k 65536 41 0 39 1 0 1 1 0 8 0 mcl16k 16384 9 0 9 2 1 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl9k128 9344 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 3256 0 3206 15 6 9 13 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 1204 0 1198 7 1 6 6 0 8 5 mtagpl 96 7 0 6 1 0 1 1 0 8 0 mbufpl 256 18180 0 17957 410 379 31 410 0 8 8 bufpl 280 7143 0 927 445 0 445 445 0 8 0 anonpl 24 167969 0 165311 66 21 45 45 0 186 16 amapchunkpl 152 27177 0 26778 42 9 33 33 0 158 16 amappl16 200 3181 0 3153 22 9 13 15 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 539 0 538 1 0 1 1 0 8 0 amappl13 176 141 0 133 1 0 1 1 0 8 0 amappl12 168 1365 0 1341 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 62 0 52 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 140 0 139 1 0 1 1 0 8 0 amappl7 128 188 0 178 1 0 1 1 0 8 0 amappl6 120 262 0 260 1 0 1 1 0 8 0 amappl5 112 92 0 85 1 0 1 1 0 8 0 amappl4 104 315 0 297 1 0 1 1 0 8 0 amappl3 96 5364 0 5269 4 0 4 4 0 8 1 amappl2 88 642 0 596 2 0 2 2 0 8 0 amappl1 80 13986 0 13599 13 1 12 13 0 8 3 amappl 88 7682 0 7546 5 0 5 5 0 92 0 uvmvnodes 80 115 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 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 8 0 8 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 79 0 3 2 0 2 2 0 8 0 uaddrrnd 24 1080 0 1054 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1080 0 1054 1 0 1 1 0 8 0 vmmpekpl 168 10473 0 10431 3 0 3 3 0 8 0 vmmpepl 168 76373 0 74921 93 1 92 92 0 357 25 vmsppl 368 1079 0 1054 4 1 3 4 0 8 0 rwobjpl 40 23740 0 22838 13 0 13 13 0 8 0 pdppl 4096 2166 0 2108 104 42 62 80 0 8 4 pvpl 32 469167 0 461657 138 27 111 111 0 265 33 pmappl 216 1079 0 1054 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 797 0 447 22 0 22 22 0 8 3 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a887780) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806b953130,ffff80002a887808,fffffd8007ffd680,ffff80002a88784c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a887990,ffff80002a8878e0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3220 syscall(ffff80002a887990) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a887990) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e6b14522d60, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a887780) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806b953130,ffff80002a887808,fffffd8007ffd680,ffff80002a88784c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736d00,ffff80002a887990,ffff80002a8878e0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3220 syscall(ffff80002a887990) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a887990) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e6b14522d60, count: -5 ddb>