uvm_fault(0xffffffff83a41c50, 0xffff80002319200c, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_direnter+0x23b: movl 0(%r14),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND *124140 13890 0 0x2 0 0 syz-executor ufs_direnter(fffff0006c2772e8,fffff0000e95c7d8,ffff80003c8e1200,ffff80003c8e1530,fffff00073e9f010) at ufs_direnter+0x23b sys/ufs/ufs/ufs_lookup.c:764 ufs_mkdir(ffff80003c8e13a0) at ufs_mkdir+0x5d5 sys/ufs/ufs/ufs_vnops.c:1179 VOP_MKDIR(fffff0006c2772e8,ffff80003c8e1500,ffff80003c8e1530,ffff80003c8e1430) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a79c560,ffffff9c,70f43cdefd80,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80003c8e16a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8e16a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70f43cdefe20, count: 9 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(0xffffffff83a41c50, 0xffff80002319200c, 0, 1) -> d ddb> trace ufs_direnter(fffff0006c2772e8,fffff0000e95c7d8,ffff80003c8e1200,ffff80003c8e1530,fffff00073e9f010) at ufs_direnter+0x23b sys/ufs/ufs/ufs_lookup.c:764 ufs_mkdir(ffff80003c8e13a0) at ufs_mkdir+0x5d5 sys/ufs/ufs/ufs_vnops.c:1179 VOP_MKDIR(fffff0006c2772e8,ffff80003c8e1500,ffff80003c8e1530,ffff80003c8e1430) at VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 domkdirat(ffff80002a79c560,ffffff9c,70f43cdefd80,1ff) at domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 syscall(ffff80003c8e16a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8e16a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70f43cdefe20, count: -6 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c8e11f0 rbx 0xfffff00007ffd068 rdx 0 rcx 0xfffff0006978e8c8 rax 0xffff80002a79c560 r8 0xffffffffffffffff r9 0 r10 0xc8e26869c20e43cc r11 0xd197b485f446f387 r12 0xfffff000746b4b00 r13 0xfffff0006f2e5200 r14 0xffff80002319200c r15 0 rip 0xffffffff827bc8fb ufs_direnter+0x23b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c8e1150 ss 0x10 ufs_direnter+0x23b: movl 0(%r14),%r15d ddb> show proc PROC (syz-executor) tid=124140 pid=13890 tcnt=1 stat=onproc flags process=2 proc=0 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a79c7f8,0xffff80002a79da30 process=0xffff800035d16420 user=0xffff80003c8dc000, vmspace=0xfffff0006d6905d8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89373 427722 70565 0 2 0 syz-executor 89373 349890 70565 0 2 0x4000000 syz-executor 90811 169550 75571 0 3 0x80 nanoslp syz-executor 90811 446282 75571 0 3 0x4000080 kqpoll syz-executor 90811 71853 75571 0 3 0x4000080 fsleep syz-executor 27200 283887 76846 0 2 0xc80 syz-executor 27200 475384 76846 0 3 0x4000080 pipewr syz-executor 27200 485580 76846 0 3 0x4000080 fsleep syz-executor 35790 207728 84641 0 3 0x80 nanoslp syz-executor 35790 70981 84641 0 3 0x4000080 kqpoll syz-executor 35790 386870 84641 0 3 0x4000080 fsleep syz-executor 21009 196598 583 0 3 0x91 nanoslp syz-executor 21009 238408 583 0 3 0x4000091 kqsel syz-executor 21009 211468 583 0 3 0x4000091 fsleep syz-executor 21009 477276 583 0 3 0x4000091 kqsel syz-executor *13890 124140 15070 0 7 0x2 syz-executor 70565 431502 15070 0 2 0xc82 syz-executor 75571 46446 15070 0 3 0x82 nanoslp syz-executor 11151 446738 1 0 3 0x80 nanoslp init 84641 232156 15070 0 2 0xc82 syz-executor 51101 223162 15070 0 2 0x2 syz-executor 76846 469223 15070 0 3 0x82 nanoslp syz-executor 583 419993 15070 0 3 0x82 nanoslp syz-executor 15070 50271 1 0 2 0x82 syz-executor 71449 297668 1 73 3 0x1100090 kqread syslogd 60946 102013 0 0 3 0x14200 bored smr 74727 244833 0 0 2 0x14200 zerothread 82124 219733 0 0 3 0x14200 aiodoned aiodoned 27501 276204 0 0 3 0x14200 syncer update 33711 93510 0 0 3 0x14200 cleaner cleaner 79243 502925 0 0 3 0x14200 reaper reaper 44368 69144 0 0 3 0x14200 pgdaemon pagedaemon 2262 253776 0 0 3 0x14200 bored viomb 47190 144202 0 0 3 0x40014200 acpi0 acpi0 60198 125755 0 0 2 0x14200 softnet0 84024 434580 0 0 3 0x14200 bored systqmp 97499 288885 0 0 3 0x14200 bored systq 88332 211067 0 0 3 0x40014200 tmoslp softclock 80297 249895 0 0 3 0x40014200 idle0 1 212481 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 11037 12176K 12647K 166960K 12888 0 pcb 18 13K 13K 166960K 129 0 rtable 228 10K 11K 166960K 604 0 pf 38 14K 18K 166960K 122 0 ifaddr 36 5K 7K 166960K 76 0 ifgroup 55 2K 2K 166960K 107 0 sysctl 4 1K 9K 166960K 16 0 counters 34 17K 18K 166960K 56 0 ioctlops 0 0K 4K 166960K 310 0 iov 0 0K 16K 166960K 34 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1416 89K 90K 166960K 2006 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 36 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 224K 166960K 794 0 sigio 0 0K 0K 166960K 6 0 proc 14 25K 83K 166960K 663 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 206 0 in_multi 76 5K 7K 166960K 153 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 21 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 459 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 137 100K 167K 166960K 8554 0 UVM aobj 28 2K 2K 166960K 30 0 pinsyscall 18 36K 92K 166960K 1973 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 20 0 NDP 12 0K 2K 166960K 54 0 temp 58 9111K 9175K 166960K 33663 0 kqueue 4 6K 28K 166960K 112 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 80 0 80 1 0 1 1 0 8 1 rtentry 136 162 0 75 4 0 4 4 0 8 0 unpcb 144 733 0 728 6 5 1 6 0 8 0 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 167 0 166 1 0 1 1 0 8 0 arp 96 25 0 13 1 0 1 1 0 8 0 ipq 40 4 0 1 1 0 1 1 0 8 0 ipqe 40 6 0 2 1 0 1 1 0 8 0 inpcb 328 589 0 586 8 2 6 6 0 8 5 ip6q 72 4 0 1 2 1 1 1 0 8 0 ip6af 40 5 0 2 2 1 1 1 0 8 0 nd6 112 37 0 17 1 0 1 1 0 8 0 pkpcb 40 10 0 10 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1072 15 0 15 2 1 1 1 0 8 1 pfstscr 40 4 0 0 1 0 1 1 0 8 0 pfrktable 1344 9 0 7 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 2 1 0 1 1 0 8 0 pfstate 384 5 0 2 1 0 1 1 0 8 0 pfrule 1360 13 0 11 1 0 1 1 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 669 0 296 33 7 26 30 0 8 0 art_table 40 671 0 296 5 0 5 5 0 8 0 art_node 32 158 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 72 34 0 24 1 0 1 1 0 8 0 shmpl 112 27 0 2 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2694 0 1229 92 0 92 92 0 8 0 ffsino 256 2694 0 1229 92 0 92 92 0 8 0 nchpl 144 3756 0 2051 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 3201 0 0 178 0 178 178 0 8 0 namei 1024 12104 0 12103 3 1 2 2 0 8 1 pfiaddrpl 120 2 0 1 1 0 1 1 0 8 0 kstatmem 264 63 0 38 3 1 2 3 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 16298 0 16298 11 3 8 8 1 8 8 plimitpl 152 97 0 86 1 0 1 1 0 8 0 sigapl 424 1094 0 1063 7 0 7 7 0 8 1 knotepl 120 25069 0 25045 10 0 10 10 0 8 7 kqueuepl 184 225 0 218 2 1 1 2 0 8 0 pipepl 304 229 0 201 8 5 3 8 0 8 0 fdescpl 448 1060 0 1042 5 1 4 5 0 8 0 filepl 120 5638 0 5461 14 6 8 13 0 8 1 lockfpl 104 213 0 212 1 0 1 1 0 8 0 lockfspl 48 93 0 92 1 0 1 1 0 8 0 sessionpl 144 51 0 46 1 0 1 1 0 8 0 pgrppl 48 67 0 54 1 0 1 1 0 8 0 ucredpl 104 704 0 698 1 0 1 1 0 8 0 zombiepl 144 1064 0 1063 1 0 1 1 0 8 0 processpl 1152 1094 0 1063 5 0 5 5 0 8 0 procpl 664 2023 0 1982 7 0 7 7 0 8 1 sosppl 176 1 0 1 1 1 0 1 0 8 0 sockpl 552 1434 0 1426 15 9 6 12 0 8 4 mcl64k 65536 49 0 48 1 0 1 1 0 8 0 mcl16k 16384 3 0 3 1 1 0 1 0 8 0 mcl9k128 9344 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 12 0 11 2 1 1 1 0 8 0 mcl4k 4096 3384 0 3328 15 5 10 13 0 8 2 mcl2k 2048 725 0 724 5 3 2 3 0 8 1 mtagpl 96 13 0 12 1 0 1 1 0 8 0 mbufpl 256 12239 0 12123 22 9 13 22 0 8 2 bufpl 272 6617 0 401 415 0 415 415 0 8 0 anonpl 24 176825 0 175105 55 14 41 53 0 186 10 amapchunkpl 152 29567 0 29042 46 15 31 33 0 158 7 amappl16 200 3403 0 3383 25 21 4 21 0 8 0 amappl15 192 7 0 5 1 0 1 1 0 8 0 amappl14 184 445 0 445 2 1 1 1 0 8 1 amappl13 176 125 0 124 1 0 1 1 0 8 0 amappl12 168 1322 0 1306 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 56 0 54 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 104 0 104 1 0 1 1 0 8 1 amappl7 128 157 0 152 1 0 1 1 0 8 0 amappl6 120 185 0 184 1 0 1 1 0 8 0 amappl5 112 92 0 89 1 0 1 1 0 8 0 amappl4 104 310 0 303 1 0 1 1 0 8 0 amappl3 96 5541 0 5471 4 1 3 4 0 8 0 amappl2 88 577 0 563 2 0 2 2 0 8 0 amappl1 80 13600 0 13477 13 3 10 13 0 8 1 amappl 88 7658 0 7540 5 0 5 5 0 92 0 uvmvnodes 80 119 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 7 0 7 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 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 29 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1060 0 1042 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1060 0 1042 1 0 1 1 0 8 0 vmmpekpl 168 9986 0 9935 3 0 3 3 0 8 0 vmmpepl 168 75562 0 74749 93 17 76 93 0 357 23 vmsppl 368 1059 0 1042 4 1 3 4 0 8 0 rwobjpl 40 23118 0 22648 13 0 13 13 0 8 0 pdppl 4096 2126 0 2084 98 50 48 78 0 8 6 pvpl 32 476991 0 472900 133 30 103 133 0 265 25 pmappl 216 1059 0 1042 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 800 0 82 21 0 21 21 0 8 0 ddb> machine ddbcpu 0 No such command ddb>