uvm_fault(0xffffffff83a5cdf8, 0xffff800028f82004, 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 *497275 4411 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a849190) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806e34ec00,ffff80002a849218,fffffd8007ffd8f0,ffff80002a84925c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736538,ffff80002a8493a0,ffff80002a8492f0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a8493a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8493a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e2f74769870, 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(0xffffffff83a5cdf8, 0xffff800028f82004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a849190) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806e34ec00,ffff80002a849218,fffffd8007ffd8f0,ffff80002a84925c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736538,ffff80002a8493a0,ffff80002a8492f0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a8493a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8493a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e2f74769870, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a849180 rbx 0x200 rdx 0 rcx 0 rax 0xffff800028f82200 r8 0xffffffffffffffff r9 0x3 r10 0xfe6c2a66f5440075 r11 0x70ef93d21b2379dc r12 0 r13 0xffff80002a849218 r14 0xffff800028f82000 r15 0xffff800028f82008 rip 0xffffffff813f90de ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a848fd0 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=497275 pid=4411 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=0xffff80002a7374c8,0xffff80002a736018 process=0xffff80002a790910 user=0xffff80002a844000, vmspace=0xfffffd806f4cbb88 estcpu=36, cpticks=15, pctcpu=0.0, user=0, sys=15, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 17319 328188 64916 0 2 0 syz-executor 17319 470360 64916 0 3 0x4000080 fsleep syz-executor 74871 482494 11065 0 2 0 syz-executor 74871 432149 11065 0 3 0x4000080 fsleep syz-executor 9703 192796 78019 0 2 0 syz-executor 9703 126319 78019 0 2 0x4000000 syz-executor 9856 242546 1 0 3 0x80 nanoslp init 44808 458951 41428 0 2 0 syz-executor 44808 340097 41428 0 3 0x4000080 fsleep syz-executor 44808 2794 41428 0 3 0x4000080 fsleep syz-executor 44808 33627 41428 0 3 0x4000080 fsleep syz-executor 48732 10385 0 0 3 0x14280 nfsidl nfsio 39607 523724 0 0 3 0x14280 nfsidl nfsio 58357 181653 0 0 3 0x14280 nfsidl nfsio 61044 89642 0 0 3 0x14280 nfsidl nfsio 83191 131173 0 0 3 0x14280 nfsidl nfsio 31387 359294 0 0 3 0x14280 nfsidl nfsio 17189 286833 0 0 3 0x14280 nfsidl nfsio 46473 8442 0 0 3 0x14280 nfsidl nfsio 44678 323335 0 0 3 0x14280 nfsidl nfsio 89355 422592 0 0 3 0x14280 nfsidl nfsio 76921 116476 0 0 3 0x14280 nfsidl nfsio 91371 361982 0 0 3 0x14280 nfsidl nfsio 47543 409222 0 0 3 0x14280 nfsidl nfsio 926 406025 0 0 3 0x14280 nfsidl nfsio 47292 235387 0 0 3 0x14280 nfsidl nfsio 82427 23424 0 0 3 0x14280 nfsidl nfsio 4914 245644 0 0 3 0x14280 nfsidl nfsio 17424 2844 0 0 3 0x14280 nfsidl nfsio 98373 129072 0 0 3 0x14280 nfsidl nfsio 50634 121957 0 0 3 0x14280 nfsidl nfsio 33940 318650 41674 0 3 0x81 nanoslp syz-executor 33940 377514 41674 0 3 0x4000081 ttyout syz-executor 41674 144279 28131 0 3 0x82 nanoslp syz-executor 11065 315851 28131 0 2 0xc82 syz-executor 78019 397773 28131 0 2 0xc82 syz-executor * 4411 497275 28131 0 7 0x2 syz-executor 41428 461040 28131 0 3 0x82 nanoslp syz-executor 64916 421 28131 0 3 0x82 nanoslp syz-executor 28131 53017 1 0 3 0x82 wait syz-executor 10735 77554 0 0 3 0x14200 bored smr 64847 468430 0 0 2 0x14200 zerothread 59933 169891 0 0 3 0x14200 aiodoned aiodoned 82670 118974 0 0 3 0x14200 syncer update 28762 122414 0 0 3 0x14200 cleaner cleaner 97499 264778 0 0 3 0x14200 reaper reaper 99132 376399 0 0 3 0x14200 pgdaemon pagedaemon 96525 349866 0 0 3 0x14200 bored viomb 19080 412789 0 0 3 0x40014200 acpi0 acpi0 11055 191611 0 0 3 0x14200 bored softnet0 72123 231810 0 0 3 0x14200 bored systqmp 26151 418342 0 0 3 0x14200 bored systq 22043 207871 0 0 3 0x40014200 tmoslp softclock 61537 290433 0 0 3 0x40014200 idle0 1 110773 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 11052 12304K 12374K 166960K 12793 0 pcb 17 12K 12K 166960K 169 0 rtable 207 6K 7K 166960K 461 0 pf 35 14K 22K 166960K 162 0 ifaddr 38 6K 7K 166960K 67 0 ifgroup 46 2K 2K 166960K 101 0 sysctl 1 1K 9K 166960K 5 0 counters 32 17K 18K 166960K 48 0 ioctlops 0 0K 4K 166960K 142 0 iov 0 0K 12K 166960K 26 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1289 81K 81K 166960K 1920 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 15 2K 3K 166960K 24 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 53K 85K 166960K 1360 0 sigio 0 0K 0K 166960K 13 0 proc 12 17K 91K 166960K 609 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 54 0 in_multi 84 6K 7K 166960K 158 0 ether_multi 1 0K 0K 166960K 16 0 mrt 0 0K 0K 166960K 39 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 428 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 110 77K 172K 166960K 12393 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 16 32K 92K 166960K 2512 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 42 0 NDP 10 0K 2K 166960K 44 0 temp 54 9111K 9174K 166960K 40081 0 kqueue 1 2K 28K 166960K 192 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 60 0 60 1 0 1 1 0 8 1 rtentry 136 141 0 51 4 0 4 4 0 8 0 unpcb 144 269 0 269 1 0 1 1 0 8 1 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpcb 736 139 0 138 1 0 1 1 0 8 0 arp 96 22 0 5 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 6 0 2 1 0 1 1 0 8 0 inpcb 328 480 0 479 2 0 2 2 0 8 1 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 29 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 8 0 8 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 36 0 26 1 0 1 1 0 8 0 pfrktable 1344 3 0 2 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 7 0 1 1 0 1 1 0 8 0 pftag 88 6 0 3 1 0 1 1 0 8 0 pfstitem 24 17 0 6 1 0 1 1 0 8 0 pfstkey 128 40 0 26 1 0 1 1 0 8 0 pfstate 384 21 0 14 1 0 1 1 0 8 0 pfrule 1360 26 0 25 1 0 1 1 0 8 0 rttmr 136 5 0 5 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 671 0 281 30 0 30 30 0 8 5 art_table 40 672 0 281 5 0 5 5 0 8 0 art_node 32 141 0 61 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 17 0 4 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 3516 0 2061 92 0 92 92 0 8 0 ffsino 256 3517 0 2062 92 0 92 92 0 8 0 nchpl 144 5104 0 3411 64 0 64 64 0 8 0 vnodes 216 3858 0 0 215 0 215 215 0 8 0 namei 1024 13972 0 13972 2 0 2 2 0 8 2 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 51 0 30 2 0 2 2 0 8 0 scsiplug 72 10 0 10 1 0 1 1 0 8 1 scxspl 216 19638 0 19638 8 0 8 8 1 8 8 plimitpl 152 162 0 152 1 0 1 1 0 8 0 sigapl 424 1681 0 1631 6 0 6 6 0 8 0 knotepl 120 54261 0 54244 24 14 10 17 0 8 8 kqueuepl 184 193 0 192 1 0 1 1 0 8 0 pipepl 304 148 0 121 3 0 3 3 0 8 0 fdescpl 448 1648 0 1631 4 0 4 4 0 8 0 filepl 120 5142 0 4989 7 0 7 7 0 8 0 lockfpl 104 304 0 304 1 0 1 1 0 8 1 lockfspl 48 124 0 124 1 0 1 1 0 8 1 sessionpl 144 59 0 56 1 0 1 1 0 8 0 pgrppl 48 68 0 57 1 0 1 1 0 8 0 ucredpl 104 1163 0 1159 1 0 1 1 0 8 0 zombiepl 144 1633 0 1631 1 0 1 1 0 8 0 processpl 1152 1681 0 1631 4 0 4 4 0 8 0 procpl 664 3069 0 3012 6 0 6 6 0 8 0 sockpl 552 814 0 813 3 0 3 3 0 8 2 mcl64k 65536 382 0 381 1 0 1 1 0 8 0 mcl16k 16384 258 0 258 1 0 1 1 0 8 1 mcl12k 12288 177 0 177 1 0 1 1 0 8 1 mcl9k128 9344 54 0 54 1 0 1 1 0 8 1 mcl8k 8192 163 0 163 1 0 1 1 0 8 1 mcl4k 4096 4854 0 4803 15 0 15 15 0 8 8 mcl2k2 2112 7 0 7 1 0 1 1 0 8 1 mcl2k 2048 399 0 396 2 0 2 2 0 8 1 mtagpl 96 13 0 9 1 0 1 1 0 8 0 mbufpl 256 18148 0 17993 20 0 20 20 0 8 6 bufpl 280 7553 0 1337 445 0 445 445 0 8 0 anonpl 24 185560 0 183510 57 0 57 57 0 186 35 amapchunkpl 152 42835 0 42542 37 0 37 37 0 158 20 amappl16 200 2429 0 2357 22 10 12 16 0 8 8 amappl15 192 2 0 2 1 0 1 1 0 8 1 amappl14 184 422 0 422 1 0 1 1 0 8 1 amappl13 176 117 0 117 1 0 1 1 0 8 1 amappl12 168 1888 0 1873 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 0 1 1 0 8 1 amappl10 152 57 0 57 1 0 1 1 0 8 1 amappl9 144 270 0 270 1 0 1 1 0 8 1 amappl8 136 94 0 94 1 0 1 1 0 8 1 amappl7 128 147 0 145 1 0 1 1 0 8 0 amappl6 120 168 0 168 1 0 1 1 0 8 1 amappl5 112 182 0 182 1 0 1 1 0 8 1 amappl4 104 271 0 270 1 0 1 1 0 8 0 amappl3 96 9073 0 9011 3 0 3 3 0 8 0 amappl2 88 538 0 533 2 0 2 2 0 8 0 amappl1 80 15632 0 15544 13 0 13 13 0 8 7 amappl 88 11595 0 11495 4 0 4 4 0 92 0 uvmvnodes 80 141 0 0 3 0 3 3 0 8 0 dma32768 32768 2 0 2 1 0 1 1 0 8 1 dma8192 8192 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma2048 2048 5 0 5 1 0 1 1 0 8 1 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 256 0 256 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 8 0 8 1 0 1 1 0 8 1 dma16 16 24 0 23 1 0 1 1 0 8 0 aobjpl 72 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1648 0 1631 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1648 0 1631 1 0 1 1 0 8 0 vmmpekpl 168 12764 0 12725 2 0 2 2 0 8 0 vmmpepl 168 105396 0 104644 90 0 90 90 0 357 50 vmsppl 368 1647 0 1631 4 0 4 4 0 8 1 rwobjpl 40 25865 0 25415 13 0 13 13 0 8 1 pdppl 4096 3302 0 3262 94 48 46 76 0 8 6 pvpl 32 730884 0 725403 149 0 149 149 0 265 92 pmappl 216 1647 0 1631 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 371 0 48 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a849190) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806e34ec00,ffff80002a849218,fffffd8007ffd8f0,ffff80002a84925c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736538,ffff80002a8493a0,ffff80002a8492f0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a8493a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8493a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e2f74769870, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a849190) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffffd806e34ec00,ffff80002a849218,fffffd8007ffd8f0,ffff80002a84925c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a736538,ffff80002a8493a0,ffff80002a8492f0) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3219 syscall(ffff80002a8493a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8493a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e2f74769870, count: -5 ddb>