login: uvm_fault(0xffffffff83a08128, 0xffff800028b22004, 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 *321134 17771 0 0x2 0 0 syz-executor ufs_readdir(ffff80002a8a79a0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff28076710a28,ffff80002a8a7a28,fffff28007ffd618,ffff80002a8a7a6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7362a0,ffff80002a8a7bb0,ffff80002a8a7b00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a7bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x745a2b003c10, 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(0xffffffff83a08128, 0xffff800028b22004, 0, 1) -> d ddb> trace ufs_readdir(ffff80002a8a79a0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff28076710a28,ffff80002a8a7a28,fffff28007ffd618,ffff80002a8a7a6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7362a0,ffff80002a8a7bb0,ffff80002a8a7b00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a7bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x745a2b003c10, count: -5 ddb> show registers rdi 0x200 rsi 0x800 rbp 0xffff80002a8a7990 rbx 0x200 rdx 0 rcx 0xfffff2807a7447e8 rax 0xffff800028b22200 r8 0xffffffffffffffff r9 0x3 r10 0x688e27dfa976d7db r11 0x5a05de6e4596732 r12 0 r13 0xffff80002a8a7a28 r14 0xffff800028b22000 r15 0xffff800028b22008 rip 0xffffffff818d133e ufs_readdir+0x26e cs 0x8 rflags 0x10283 __ALIGN_SIZE+0xf283 rsp 0xffff80002a8a77e0 ss 0x10 ufs_readdir+0x26e: movzwl 0x4(%r14),%ebx ddb> show proc PROC (syz-executor) tid=321134 pid=17771 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=0xffff80002a736a68,0xffff80002a7642c0 process=0xffff80002a78ba90 user=0xffff80002a8a2000, vmspace=0xfffff280729e38a8 estcpu=36, cpticks=8, pctcpu=0.0, user=1, sys=5, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58495 487046 69638 0 2 0 syz-executor 58495 431682 69638 0 3 0x4000080 kqpoll syz-executor 12053 201784 7830 0 2 0 syz-executor 12053 103189 7830 0 2 0x4000000 syz-executor 79073 53250 79760 0 2 0xc80 syz-executor 79073 354622 79760 0 3 0x4000080 kqsel syz-executor 79073 113847 79760 0 3 0x4000080 fsleep syz-executor 79073 180057 79760 0 3 0x4000080 fsleep syz-executor 11730 194646 1 0 3 0x80 nanoslp init 97919 385882 49990 0 2 0xc80 syz-executor 97919 466364 49990 0 3 0x4000080 kqsel syz-executor 97919 98333 49990 0 3 0x4000080 fsleep syz-executor 69638 129672 2937 0 2 0xc82 syz-executor 10189 183964 2937 0 3 0x82 piperd syz-executor 7830 405811 2937 0 2 0xc82 syz-executor 59890 286885 0 0 3 0x14200 acct acct 49990 291601 2937 0 2 0xc82 syz-executor 79760 194532 2937 0 2 0xc82 syz-executor *17771 321134 2937 0 7 0x2 syz-executor 52557 353074 2937 0 3 0x82 wait syz-executor 13773 521519 2937 0 2 0xc82 syz-executor 2937 130898 1 0 2 0x2 syz-executor 53604 146772 0 0 3 0x14200 bored smr 55857 296075 0 0 2 0x14200 zerothread 29517 168866 0 0 3 0x14200 aiodoned aiodoned 27205 415910 0 0 3 0x14200 syncer update 28451 299850 0 0 3 0x14200 cleaner cleaner 65076 276730 0 0 3 0x14200 reaper reaper 82076 336840 0 0 3 0x14200 pgdaemon pagedaemon 28500 412973 0 0 3 0x14200 bored viomb 64876 312241 0 0 3 0x40014200 acpi0 acpi0 54240 390193 0 0 2 0x14200 softnet0 66446 460420 0 0 3 0x14200 bored systqmp 68751 208739 0 0 3 0x14200 bored systq 69692 500202 0 0 3 0x40014200 tmoslp softclock 63193 20696 0 0 3 0x40014200 idle0 1 320314 0 0 3 0x80082 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 11061 12181K 12462K 166960K 13592 0 pcb 17 14K 16K 166960K 390 0 rtable 219 11K 11K 166960K 630 0 pf 33 13K 92K 166960K 243 0 ifaddr 36 6K 7K 166960K 110 0 ifgroup 46 2K 2K 166960K 179 0 sysctl 4 1K 9K 166960K 14 0 counters 32 17K 18K 166960K 216 0 ioctlops 0 0K 4K 166960K 659 0 iov 0 0K 24K 166960K 130 0 mount 1 1K 1K 166960K 1 0 log 2 0K 0K 166960K 6 0 vnodes 1300 82K 82K 166960K 2329 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 161 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 57K 240K 166960K 1300 0 sigio 1 0K 0K 166960K 15 0 proc 15 25K 83K 166960K 789 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 245 0 in_multi 86 6K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 29 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 588 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 124 78K 168K 166960K 12571 0 UVM aobj 24 6K 6K 166960K 25 0 pinsyscall 17 34K 95K 166960K 2527 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 37 0 NDP 12 0K 2K 166960K 80 0 temp 71 9114K 13212K 166960K 41675 0 kqueue 2 4K 34K 166960K 224 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 120 216 0 216 2 0 2 2 0 8 2 rtentry 136 184 0 99 4 0 4 4 0 8 1 unpcb 144 746 0 746 4 0 4 4 0 8 4 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 323 0 321 4 0 4 4 0 8 3 arp 96 29 0 16 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 1 1 0 1 1 0 8 0 inpcb 328 1208 0 1205 7 0 7 7 0 8 6 ip6q 72 40 0 36 1 0 1 1 0 8 0 ip6af 40 77 0 72 1 0 1 1 0 8 0 nd6 112 45 0 23 1 0 1 1 0 8 0 pkpcb 40 12 0 12 1 0 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1072 166 0 166 1 0 1 1 0 8 1 pppxif 1416 131 0 131 1 0 1 1 0 8 1 pfstscr 40 92 0 16 1 0 1 1 0 8 0 pfrktable 1344 9 2 7 1 0 1 1 0 8 0 pfsrclim 320 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 7 0 3 1 0 1 1 0 8 0 pftag 88 8 0 7 1 0 1 1 0 8 0 pfqueue 320 3 0 2 1 0 1 1 0 8 0 pfstitem 24 77 0 70 1 0 1 1 0 8 0 pfstkey 128 93 0 50 2 0 2 2 0 8 0 pfstate 384 47 0 9 4 0 4 4 0 8 0 pfrule 1360 20 0 17 1 0 1 1 0 8 0 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 819 0 416 30 1 29 30 0 8 3 art_table 40 822 0 416 5 0 5 5 0 8 0 art_node 32 184 0 108 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 4 1 0 1 1 0 8 0 semapl 72 156 0 146 1 0 1 1 0 8 0 shmpl 112 22 0 1 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 3609 0 2143 92 0 92 92 0 8 0 ffsino 256 3609 0 2143 92 0 92 92 0 8 0 nchpl 144 5334 0 3625 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 vnodes 216 4253 0 0 237 0 237 237 0 8 0 namei 1024 17868 0 17868 2 0 2 2 0 8 2 pfiaddrpl 120 4 0 3 1 0 1 1 0 8 0 kstatmem 264 107 0 86 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 0 1 1 0 8 1 scxspl 216 22004 0 22004 8 0 8 8 1 8 8 plimitpl 152 375 0 364 1 0 1 1 0 8 0 sigapl 424 1567 0 1535 6 0 6 6 0 8 1 knotepl 120 41330 0 41312 36 23 13 23 0 8 8 kqueuepl 184 388 0 380 3 0 3 3 0 8 2 pipepl 304 266 0 239 8 0 8 8 0 8 5 fdescpl 448 1552 0 1534 5 0 5 5 0 8 1 filepl 120 8803 0 8635 13 0 13 13 0 8 4 lockfpl 104 616 0 614 2 0 2 2 0 8 1 lockfspl 48 207 0 205 1 0 1 1 0 8 0 sessionpl 144 73 0 71 1 0 1 1 0 8 0 pgrppl 48 92 0 82 1 0 1 1 0 8 0 ucredpl 104 1346 0 1342 1 0 1 1 0 8 0 zombiepl 144 1537 0 1535 1 0 1 1 0 8 0 processpl 1152 1567 0 1535 4 0 4 4 0 8 0 procpl 664 3128 0 3089 6 0 6 6 0 8 1 sosppl 176 7 0 7 1 0 1 1 0 8 1 sockpl 552 2268 0 2265 10 0 10 10 0 8 7 mcl64k 65536 150 0 150 1 0 1 1 0 8 1 mcl16k 16384 7 0 7 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 19 0 19 1 0 1 1 0 8 1 mcl4k 4096 4073 0 4021 15 0 15 15 0 8 8 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 1053 0 1049 3 0 3 3 0 8 2 mtagpl 96 9 0 7 1 0 1 1 0 8 0 mbufpl 256 17026 0 16867 17 0 17 17 0 8 4 bufpl 280 8385 0 2169 445 0 445 445 0 8 0 anonpl 24 204678 0 199096 54 0 54 54 0 186 19 amapchunkpl 152 43014 0 42670 35 0 35 35 0 158 17 amappl16 200 3543 0 3279 15 0 15 15 0 8 1 amappl15 192 40 0 40 1 0 1 1 0 8 1 amappl14 184 471 0 471 1 0 1 1 0 8 1 amappl13 176 130 0 130 1 0 1 1 0 8 1 amappl12 168 1807 0 1791 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 0 1 1 0 8 1 amappl10 152 56 0 56 1 0 1 1 0 8 1 amappl9 144 270 0 269 1 0 1 1 0 8 0 amappl8 136 146 0 145 1 0 1 1 0 8 0 amappl7 128 158 0 156 1 0 1 1 0 8 0 amappl6 120 197 0 196 1 0 1 1 0 8 0 amappl5 112 93 0 92 1 0 1 1 0 8 0 amappl4 104 293 0 291 1 0 1 1 0 8 0 amappl3 96 8646 0 8574 4 0 4 4 0 8 0 amappl2 88 592 0 583 2 0 2 2 0 8 0 amappl1 80 15890 0 15800 15 0 15 15 0 8 7 amappl 88 11571 0 11458 5 0 5 5 0 92 0 uvmvnodes 80 136 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 24 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1552 0 1534 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1552 0 1534 1 0 1 1 0 8 0 vmmpekpl 168 13249 0 13210 3 0 3 3 0 8 0 vmmpepl 168 102747 0 101745 93 0 93 93 0 357 46 vmsppl 368 1551 0 1534 4 0 4 4 0 8 1 rwobjpl 40 27960 0 27286 13 0 13 13 0 8 0 pdppl 4096 3110 0 3068 106 58 48 80 0 8 6 pvpl 32 661905 0 653855 130 0 130 130 0 265 61 pmappl 216 1551 0 1534 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 59 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_readdir(ffff80002a8a79a0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff28076710a28,ffff80002a8a7a28,fffff28007ffd618,ffff80002a8a7a6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7362a0,ffff80002a8a7bb0,ffff80002a8a7b00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a7bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x745a2b003c10, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace ufs_readdir(ffff80002a8a79a0) at ufs_readdir+0x26e sys/ufs/ufs/ufs_vnops.c:1397 VOP_READDIR(fffff28076710a28,ffff80002a8a7a28,fffff28007ffd618,ffff80002a8a7a6c) at VOP_READDIR+0x125 sys/kern/vfs_vops.c:453 sys_getdents(ffff80002a7362a0,ffff80002a8a7bb0,ffff80002a8a7b00) at sys_getdents+0x2dd sys/kern/vfs_syscalls.c:3132 syscall(ffff80002a8a7bb0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8a7bb0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x745a2b003c10, count: -5 ddb>