uvm_fault(0xffffffff83ac0bf8, 0xffff800022052004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *442620 24144 0 0x10 0x4000000 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff2006db7bd88,ffff8000388dba00,ffff8000388dba30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000388db9d0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff8000388db9d0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 domkdirat(ffff80003c8fb778,ffffff9c,2000000000c0,60) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 syscall(ffff8000388dbba0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000388dbba0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecdbb86d300, count: 8 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(0xffffffff83ac0bf8, 0xffff800022052004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff2006db7bd88,ffff8000388dba00,ffff8000388dba30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000388db9d0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff8000388db9d0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 domkdirat(ffff80003c8fb778,ffffff9c,2000000000c0,60) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 syscall(ffff8000388dbba0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000388dbba0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecdbb86d300, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000388db760 rbx 0 rdx 0xffff8000015e75c0 rcx 0xffffffff rax 0xffff80003c8fb778 r8 0xffffffffffffffff r9 0xfffff20007ffda28 r10 0x62fb5ee9f71865b4 r11 0x41df4549850364b9 r12 0xfffff20071283340 r13 0 r14 0 r15 0xffff800022052000 rip 0xffffffff8277f7b3 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000388db670 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=442620 pid=24144 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c8faa80,0xffffffff83abec58 process=0xffff8000ffffba98 user=0xffff8000388d6000, vmspace=0xfffff2006caa3e70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24144 30405 96718 0 2 0x10 syz-executor *24144 442620 96718 0 7 0x4000010 syz-executor 44766 8471 10218 0 2 0xc90 syz-executor 44766 349789 10218 0 3 0x4000090 ttyout syz-executor 44766 28901 10218 0 3 0x4000090 ttyout syz-executor 45619 380264 10604 0 2 0xc80 syz-executor 45619 136945 10604 0 3 0x4000080 dtread syz-executor 45619 152424 10604 0 3 0x4000080 fsleep syz-executor 72408 251401 36277 0 2 0xc80 syz-executor 72408 213778 36277 0 3 0x4000080 pipewr syz-executor 72408 21055 36277 0 3 0x4000080 pipewr syz-executor 72408 438635 36277 0 3 0x4000080 fsleep syz-executor 85403 108931 4902 0 2 0xc81 syz-executor 85403 501354 4902 0 3 0x4000081 kqsel syz-executor 85403 492950 4902 0 3 0x4000081 fsleep syz-executor 7299 124313 1 0 3 0x100083 ttyin getty 96718 183982 46606 0 3 0x82 nanoslp syz-executor 36277 516805 46606 0 2 0xc82 syz-executor 10604 203451 46606 0 2 0xc82 syz-executor 10218 406914 46606 0 2 0xc82 syz-executor 4902 76835 46606 0 2 0xc82 syz-executor 46606 166961 1 0 3 0x82 wait syz-executor 37781 266341 1 73 3 0x1100090 kqread syslogd 42003 389744 0 0 3 0x14200 bored smr 90342 276700 0 0 2 0x14200 zerothread 61893 272243 0 0 3 0x14200 aiodoned aiodoned 12586 116242 0 0 3 0x14200 syncer update 87258 245869 0 0 3 0x14200 cleaner cleaner 37014 131573 0 0 3 0x14200 reaper reaper 21637 516421 0 0 3 0x14200 pgdaemon pagedaemon 8318 11200 0 0 3 0x14200 bored viomb 79508 363039 0 0 3 0x40014200 acpi0 acpi0 8763 158669 0 0 3 0x14200 bored softnet0 85541 165310 0 0 3 0x14200 bored systqmp 550 144309 0 0 3 0x14200 bored systq 81585 142820 0 0 3 0x40014200 tmoslp softclock 14905 187422 0 0 3 0x40014200 idle0 1 148459 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 11037 12187K 12395K 166960K 12646 0 pcb 18 14K 15K 166960K 104 0 rtable 251 9K 10K 166960K 467 0 pf 34 13K 93K 166960K 107 0 ifaddr 39 6K 7K 166960K 65 0 ifgroup 54 2K 2K 166960K 98 0 sysctl 4 1K 9K 166960K 11 0 counters 34 17K 18K 166960K 55 0 ioctlops 0 0K 4K 166960K 168 0 iov 0 0K 12K 166960K 86 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1390 87K 88K 166960K 1891 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 30 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 240K 166960K 620 0 sigio 0 0K 0K 166960K 15 0 proc 20 25K 124K 166960K 561 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 45 0 in_multi 84 6K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 573 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 149 91K 175K 166960K 6845 0 UVM aobj 22 2K 2K 166960K 22 0 pinsyscall 19 38K 96K 166960K 1718 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 13 0K 2K 166960K 45 0 temp 77 9120K 13220K 166960K 25132 0 kqueue 5 8K 29K 166960K 116 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 120 137 0 137 3 0 3 3 0 8 3 rtentry 136 135 0 34 4 0 4 4 0 8 0 unpcb 144 281 0 276 3 0 3 3 0 8 2 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 131 0 128 1 0 1 1 0 8 0 arp 96 21 0 4 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 479 0 473 6 1 5 5 0 8 4 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 112 29 0 8 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 17 0 17 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 3 0 2 1 0 1 1 0 8 0 pfrktable 1344 4 0 4 1 0 1 1 0 8 1 pfsrclim 320 2 0 2 2 1 1 1 0 8 1 pfanchor 1288 5 0 3 1 0 1 1 0 8 0 pftag 88 1 0 1 1 0 1 1 0 8 1 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 3 0 2 1 0 1 1 0 8 0 pfstate 384 2 0 1 1 0 1 1 0 8 0 pfrule 1360 4 0 4 1 0 1 1 0 8 1 rttmr 136 4 0 4 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 583 0 173 31 0 31 31 0 8 4 art_table 40 585 0 173 5 0 5 5 0 8 0 art_node 32 134 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 26 0 16 1 0 1 1 0 8 0 shmpl 112 19 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2430 0 978 92 0 92 92 0 8 0 ffsino 256 2431 0 979 92 0 92 92 0 8 0 nchpl 144 3300 0 1601 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2846 0 0 159 0 159 159 0 8 0 namei 1024 11457 0 11456 2 1 1 2 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 57 0 32 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 16873 0 16873 5 3 2 4 1 8 2 plimitpl 152 123 0 111 1 0 1 1 0 8 0 sigapl 424 895 0 864 6 0 6 6 0 8 1 knotepl 120 20625 0 20351 23 0 23 23 0 8 14 kqueuepl 184 152 0 148 1 0 1 1 0 8 0 pipepl 304 155 0 127 3 0 3 3 0 8 0 fdescpl 448 882 0 864 5 0 5 5 0 8 1 filepl 120 5224 0 5041 11 0 11 11 0 8 3 lockfpl 104 286 0 283 2 0 2 2 0 8 1 lockfspl 48 131 0 130 1 0 1 1 0 8 0 sessionpl 144 50 0 45 1 0 1 1 0 8 0 pgrppl 48 61 0 48 1 0 1 1 0 8 0 ucredpl 104 860 0 852 1 0 1 1 0 8 0 zombiepl 144 867 0 864 1 0 1 1 0 8 0 processpl 1152 895 0 864 4 0 4 4 0 8 0 procpl 664 1585 0 1544 6 0 6 6 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 552 936 0 925 9 1 8 8 0 8 6 mcl64k 65536 32 0 32 2 1 1 1 0 8 1 mcl9k128 9344 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 11 0 11 2 1 1 1 0 8 1 mcl4k 4096 3182 0 3131 14 6 8 14 0 8 1 mcl2k2 2112 3 0 3 1 0 1 1 0 8 1 mcl2k 2048 525 0 524 1 0 1 1 0 8 0 mtagpl 96 9 0 7 2 1 1 1 0 8 0 mbufpl 256 8805 0 8685 14 0 14 14 0 8 2 bufpl 272 6683 0 467 415 0 415 415 0 8 0 anonpl 24 139310 0 137434 60 0 60 60 0 186 23 amapchunkpl 152 21796 0 21413 36 0 36 36 0 158 18 amappl16 200 2800 0 2777 31 17 14 22 0 8 8 amappl15 192 53 0 53 1 1 0 1 0 8 0 amappl14 184 455 0 455 1 0 1 1 0 8 1 amappl13 176 120 0 117 1 0 1 1 0 8 0 amappl12 168 1127 0 1110 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 112 0 110 1 0 1 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 93 0 93 1 0 1 1 0 8 1 amappl7 128 145 0 141 1 0 1 1 0 8 0 amappl6 120 156 0 155 1 0 1 1 0 8 0 amappl5 112 108 0 106 1 0 1 1 0 8 0 amappl4 104 271 0 263 1 0 1 1 0 8 0 amappl3 96 4506 0 4423 4 0 4 4 0 8 0 amappl2 88 567 0 551 2 0 2 2 0 8 0 amappl1 80 12496 0 12349 15 0 15 15 0 8 8 amappl 88 6054 0 5926 5 0 5 5 0 92 1 uvmvnodes 80 114 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 21 0 0 1 0 1 1 0 8 0 uaddrrnd 24 882 0 864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 882 0 864 1 0 1 1 0 8 0 vmmpekpl 168 8964 0 8928 2 0 2 2 0 8 0 vmmpepl 168 64377 0 63507 98 0 98 98 0 357 49 vmsppl 368 881 0 864 4 0 4 4 0 8 1 rwobjpl 40 20239 0 19715 15 1 14 14 0 8 1 pdppl 4096 1770 0 1728 112 64 48 82 0 8 6 pvpl 32 394089 0 389269 154 1 153 153 0 265 77 pmappl 216 881 0 864 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 798 0 76 21 0 21 21 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff2006db7bd88,ffff8000388dba00,ffff8000388dba30) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000388db9d0) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff8000388db9d0) at namei+0x7c3 sys/kern/vfs_lookup.c:250 domkdirat(ffff80003c8fb778,ffffff9c,2000000000c0,60) at domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 syscall(ffff8000388dbba0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000388dbba0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecdbb86d300, count: -7 ddb>