uvm_fault(0xffffffff839f3d48, 0xffff800026532004, 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 *115648 94755 0 0x1 0x4000000 0 syz-executor ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffc007ce6c528,ffff80002a7798b0,ffff80002a7798e0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a779880) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a779880) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a779880,10001,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff80002a77ca80,ffffff9c,200000000100,10000,0,0,efc13ce9947235a) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_open(ffff80002a77ca80,ffff80002a779b20,ffff80002a779a70) at sys_open+0x59 sys/kern/vfs_syscalls.c:1064 syscall(ffff80002a779b20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779b20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x34df44473a0, count: 6 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(0xffffffff839f3d48, 0xffff800026532004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffc007ce6c528,ffff80002a7798b0,ffff80002a7798e0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a779880) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a779880) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a779880,10001,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff80002a77ca80,ffffff9c,200000000100,10000,0,0,efc13ce9947235a) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_open(ffff80002a77ca80,ffff80002a779b20,ffff80002a779a70) at sys_open+0x59 sys/kern/vfs_syscalls.c:1064 syscall(ffff80002a779b20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779b20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x34df44473a0, count: -9 ddb> show registers rdi 0 rsi 0x2 rbp 0xffff80002a7794e0 rbx 0 rdx 0xffff8000015b38c0 rcx 0xffffffff rax 0xffff80002a77ca80 r8 0xffffffffffffffff r9 0xfffffc0007ffd4e0 r10 0xce7ff4efc16258a8 r11 0x8624dc4ffd1dbfb5 r12 0xfffffc00651d9ee8 r13 0 r14 0 r15 0xffff800026532000 rip 0xffffffff8315b603 ufs_lookup+0x613 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a7793f0 ss 0x10 ufs_lookup+0x613: movzwl 0x4(%r15,%r14,1),%ebx ddb> show proc PROC (syz-executor) tid=115648 pid=94755 tcnt=2 stat=onproc flags process=1 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a77c7e8,0xffff80002a77c560 process=0xffff800045ff9698 user=0xffff80002a774000, vmspace=0xfffffc006d156e78 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 61634 472114 35759 0 2 0 syz-executor 61634 480664 35759 0 3 0x4000080 fsleep syz-executor 94755 361631 8480 0 3 0x81 fsleep syz-executor *94755 115648 8480 0 7 0x4000001 syz-executor 796 364785 80409 0 3 0x80 fsleep syz-executor 796 129530 80409 0 3 0x4000080 piperd syz-executor 796 32386 80409 0 3 0x4000080 fsleep syz-executor 38274 56595 22113 0 3 0x80 fsleep syz-executor 38274 313656 22113 0 3 0x4000080 pipewr syz-executor 20690 1198 35492 0 3 0x80 fsleep syz-executor 20690 221985 35492 0 3 0x4000080 fifor syz-executor 20690 384579 35492 0 3 0x4000080 fifor syz-executor 85898 234676 37777 0 3 0x80 fsleep syz-executor 85898 147523 37777 0 3 0x4000080 rest syz-executor 18862 465247 1 0 3 0x100083 ttyin getty 84838 498923 35523 -1 3 0x90 fsleep syz-executor 84838 145945 35523 -1 3 0x4000090 lockf syz-executor 86633 426685 12485 0 3 0x80 fsleep syz-executor 86633 43306 12485 0 3 0x4000080 piperd syz-executor 86633 110958 12485 0 3 0x4000080 fsleep syz-executor 12485 307396 55731 0 3 0x82 nanoslp syz-executor 76478 30828 0 0 3 0x14200 acct acct 35492 380029 55731 0 3 0x82 nanoslp syz-executor 22113 150256 55731 0 3 0x82 nanoslp syz-executor 35523 15444 55731 0 3 0x82 nanoslp syz-executor 35759 331984 55731 0 3 0x82 nanoslp syz-executor 80409 115678 55731 0 3 0x82 nanoslp syz-executor 37777 228109 55731 0 3 0x82 nanoslp syz-executor 8480 375731 55731 0 3 0x82 nanoslp syz-executor 55731 279468 1 0 3 0x82 kqread syz-executor 83664 401986 0 0 3 0x14200 bored smr 36811 316841 0 0 2 0x14200 zerothread 52271 336561 0 0 3 0x14200 aiodoned aiodoned 47137 113726 0 0 3 0x14200 syncer update 61982 94407 0 0 3 0x14200 cleaner cleaner 40522 406967 0 0 3 0x14200 reaper reaper 4479 177177 0 0 3 0x14200 pgdaemon pagedaemon 59627 108555 0 0 3 0x14200 bored viomb 82189 198091 0 0 3 0x40014200 acpi0 acpi0 40160 312348 0 0 3 0x14200 bored softnet0 69541 326466 0 0 3 0x14200 bored systqmp 77744 458629 0 0 3 0x14200 bored systq 77459 129302 0 0 3 0x40014200 tmoslp softclock 91337 1119 0 0 3 0x40014200 idle0 1 449749 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 11035 12177K 12308K 166960K 12393 0 pcb 17 13K 14K 166960K 109 0 rtable 245 9K 9K 166960K 435 0 pf 36 14K 94K 166960K 77 0 ifaddr 41 7K 7K 166960K 62 0 ifgroup 50 2K 2K 166960K 90 0 sysctl 4 1K 9K 166960K 13 0 counters 33 17K 18K 166960K 49 0 ioctlops 0 0K 4K 166960K 93 0 iov 0 0K 16K 166960K 44 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1415 89K 89K 166960K 1680 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 30 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 65K 236K 166960K 445 0 sigio 0 0K 0K 166960K 4 0 proc 19 25K 124K 166960K 560 0 subproc 72 4K 4K 166960K 84 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 22 0 in_multi 98 7K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 15 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 411 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 4K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 139 82K 162K 166960K 5495 0 UVM aobj 13 2K 2K 166960K 14 0 pinsyscall 20 40K 96K 166960K 1572 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 11 0K 2K 166960K 40 0 temp 75 9112K 9176K 166960K 25379 0 kqueue 2 4K 27K 166960K 84 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 56 0 55 1 0 1 1 0 8 0 rtentry 136 127 0 22 4 0 4 4 0 8 0 unpcb 144 201 0 192 2 0 2 2 0 8 1 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 136 0 134 7 0 7 7 0 8 6 arp 96 21 0 5 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 5 0 3 1 0 1 1 0 8 0 inpcb 328 346 0 344 7 0 7 7 0 8 5 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 112 28 0 4 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 9 0 9 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 4 0 4 1 0 1 1 0 8 1 pfosfp 40 2 0 0 1 0 1 1 0 8 0 pfosfpen 112 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 4 1 0 1 1 0 8 1 pfstate 384 2 0 2 1 0 1 1 0 8 1 pfrule 1360 8 0 7 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 508 0 58 29 0 29 29 0 8 0 art_table 40 509 0 58 5 0 5 5 0 8 0 art_node 32 127 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 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 11 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2084 0 622 92 0 92 92 0 8 0 ffsino 256 2084 0 622 92 0 92 92 0 8 0 nchpl 144 2716 0 1016 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2407 0 0 134 0 134 134 0 8 0 namei 1024 8519 0 8518 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 45 0 22 2 0 2 2 0 8 0 scxspl 216 15594 0 15594 5 0 5 5 1 8 5 plimitpl 152 50 0 40 1 0 1 1 0 8 0 sigapl 424 731 0 697 6 0 6 6 0 8 0 knotepl 120 16267 0 16041 15 4 11 15 0 8 4 kqueuepl 184 94 0 92 1 0 1 1 0 8 0 pipepl 304 146 0 115 3 0 3 3 0 8 0 fdescpl 448 716 0 696 5 0 5 5 0 8 1 filepl 120 3341 0 3161 10 0 10 10 0 8 3 lockfpl 104 125 0 120 1 0 1 1 0 8 0 lockfspl 48 58 0 55 1 0 1 1 0 8 0 sessionpl 144 43 0 39 1 0 1 1 0 8 0 pgrppl 48 54 0 42 1 0 1 1 0 8 0 ucredpl 104 430 0 425 1 0 1 1 0 8 0 zombiepl 144 697 0 697 1 0 1 1 0 8 1 processpl 1152 731 0 697 4 0 4 4 0 8 0 procpl 664 1186 0 1141 6 0 6 6 0 8 1 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 623 0 611 7 0 7 7 0 8 5 mcl64k 65536 14 0 14 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 12 0 12 1 0 1 1 0 8 1 mcl4k 4096 2878 0 2824 13 0 13 13 0 8 5 mcl2k 2048 349 0 343 2 0 2 2 0 8 1 mextrefs 64 162 0 162 1 0 1 1 0 8 1 mtagpl 96 7 0 5 1 0 1 1 0 8 0 mbufpl 256 7017 0 6835 15 0 15 15 0 8 3 bufpl 272 6474 0 258 415 0 415 415 0 8 0 anonpl 24 133032 0 131367 69 0 69 69 0 187 45 amapchunkpl 152 17646 0 17266 33 0 33 33 0 158 14 amappl16 200 2812 0 2786 27 13 14 27 0 8 10 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 424 0 424 1 0 1 1 0 8 1 amappl13 176 134 0 133 1 0 1 1 0 8 0 amappl12 168 976 0 957 2 0 2 2 0 8 0 amappl11 160 10 0 10 1 0 1 1 0 8 1 amappl10 152 62 0 62 1 0 1 1 0 8 1 amappl9 144 268 0 268 1 0 1 1 0 8 1 amappl8 136 126 0 126 1 0 1 1 0 8 1 amappl7 128 158 0 156 1 0 1 1 0 8 0 amappl6 120 172 0 172 1 0 1 1 0 8 1 amappl5 112 118 0 116 1 0 1 1 0 8 0 amappl4 104 282 0 279 1 0 1 1 0 8 0 amappl3 96 3348 0 3262 4 0 4 4 0 8 0 amappl2 88 545 0 535 2 0 2 2 0 8 0 amappl1 80 11511 0 11387 13 0 13 13 0 8 6 amappl 88 4726 0 4601 5 0 5 5 0 92 1 uvmvnodes 80 110 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 716 0 696 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 716 0 696 1 0 1 1 0 8 0 vmmpekpl 168 7337 0 7291 3 0 3 3 0 8 0 vmmpepl 168 54563 0 53655 101 0 101 101 0 357 53 vmsppl 368 715 0 696 4 0 4 4 0 8 1 rwobjpl 40 18302 0 17850 15 0 15 15 0 8 3 pdppl 4096 1438 0 1392 98 48 50 82 0 8 4 pvpl 32 331641 0 326410 144 0 144 144 0 265 83 pmappl 216 715 0 696 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 785 0 48 22 0 22 22 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(fffffc007ce6c528,ffff80002a7798b0,ffff80002a7798e0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a779880) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a779880) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a779880,10001,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff80002a77ca80,ffffff9c,200000000100,10000,0,0,efc13ce9947235a) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_open(ffff80002a77ca80,ffff80002a779b20,ffff80002a779a70) at sys_open+0x59 sys/kern/vfs_syscalls.c:1064 syscall(ffff80002a779b20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779b20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x34df44473a0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffc007ce6c528,ffff80002a7798b0,ffff80002a7798e0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a779880) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a779880) at namei+0x7c3 sys/kern/vfs_lookup.c:250 vn_open(ffff80002a779880,10001,0) at vn_open+0x178 sys/kern/vfs_vnops.c:146 doopenat(ffff80002a77ca80,ffffff9c,200000000100,10000,0,0,efc13ce9947235a) at doopenat+0x352 sys/kern/vfs_syscalls.c:1162 sys_open(ffff80002a77ca80,ffff80002a779b20,ffff80002a779a70) at sys_open+0x59 sys/kern/vfs_syscalls.c:1064 syscall(ffff80002a779b20) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a779b20) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x34df44473a0, count: -9 ddb>