uvm_fault(0xfffffd806bccad40, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff818e5b20 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a34aa30 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff818e5b20 Starting stack trace... panic(ffffffff83333275) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a34a980) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001482000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff07d0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff07d0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a34ab30) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8070a36cc8,81,fffffd807f7d36e8,ffff8000ffff07d0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bee0670,ffff8000ffff07d0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bee0670,ffff8000ffff07d0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bee0670,ffff8000ffff07d0) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806bee0670,ffff8000ffff07d0) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff07d0) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff07d0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff07d0,ffff80002a34aea0,ffff80002a34adf0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a34aea0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a34aea0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7859ebfb6eb0, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 347561 22136 0 0 0 0 syz-executor * 26780 81160 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71780bffb930, count: 14 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{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806bccad40, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71780bffb930, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c441b70 rbx 0 rdx 0 rcx 0xffff8000ffffd1f8 rax 0x2a r8 0xffff80003c441aa0 r9 0x1 r10 0x62378942950dab0f r11 0x2db13a6fe1b0d9ed r12 0 r13 0xffffffff817abc08 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff81b3f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c441af0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=26780 pid=81160 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c414f88,0xffff8000ffff0f90 process=0xffff8000fffeaa08 user=0xffff80003c43c000, vmspace=0xfffffd806bcca200 estcpu=36, cpticks=2, pctcpu=0.0, user=2, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22136 347561 4448 0 7 0 syz-executor 22136 439504 4448 0 3 0x4000080 ttyretype syz-executor 64411 214771 80871 0 2 0 syz-executor 64411 261790 80871 0 3 0x4000080 kqsel syz-executor *81160 26780 56921 0 7 0 syz-executor 81160 249234 56921 0 3 0x4000080 kqread syz-executor 59555 226390 1266 0 2 0 syz-executor 59555 270518 1266 0 3 0x4000080 sbwait syz-executor 59555 432701 1266 0 2 0x4000000 syz-executor 34342 218264 38426 0 3 0x80 nanoslp syz-executor 34342 38391 38426 0 2 0x4000000 syz-executor 34342 500857 38426 0 3 0x4000080 fsleep syz-executor 20903 205043 1 0 3 0x100083 ttyin getty 4448 206472 37159 0 3 0x82 nanoslp syz-executor 40761 445410 0 0 3 0x14200 bored sosplice 56921 105365 37159 0 3 0x82 nanoslp syz-executor 76370 135792 37159 0 3 0x82 nanoslp syz-executor 58429 313000 37159 0 3 0x2 biowait syz-executor 80871 402242 37159 0 3 0x82 nanoslp syz-executor 1266 162607 37159 0 3 0x82 nanoslp syz-executor 83952 469380 37159 0 3 0x82 nanoslp syz-executor 38426 244252 37159 0 3 0x82 nanoslp syz-executor 37159 242514 76667 0 3 0x82 kqread syz-executor 76667 142992 8538 0 3 0x10008a sigsusp ksh 8538 352448 10892 0 3 0x98 kqread sshd-session 10892 284381 54383 0 3 0x92 kqread sshd-session 54383 406166 1 0 3 0x88 kqread sshd 26991 7546 74246 74 3 0x1100092 bpf pflogd 74246 26293 1 0 3 0x80 sbwait pflogd 85902 49153 47170 73 3 0x1100090 kqread syslogd 47170 474333 1 0 3 0x100082 sbwait syslogd 96722 406935 1 0 3 0x100080 kqread resolvd 96457 364129 34032 77 3 0x100092 kqread dhcpleased 40784 218595 34032 77 3 0x100092 kqread dhcpleased 34032 430595 1 0 3 0x80 kqread dhcpleased 89570 192349 0 0 3 0x14200 bored smr 14125 176245 0 0 2 0x14200 zerothread 15395 184562 0 0 3 0x14200 aiodoned aiodoned 7564 431177 0 0 3 0x14200 syncer update 14313 417517 0 0 3 0x14200 cleaner cleaner 97424 337169 0 0 3 0x14200 reaper reaper 20635 48042 0 0 3 0x14200 pgdaemon pagedaemon 26446 28931 0 0 3 0x14200 bored viomb 99591 431185 0 0 3 0x40014200 acpi0 acpi0 81987 79932 0 0 3 0x40014200 idle1 50054 302933 0 0 3 0x14200 bored softnet3 5843 275026 0 0 3 0x14200 bored softnet2 65161 242440 0 0 3 0x14200 bored softnet1 43315 274309 0 0 3 0x14200 netlock softnet0 67430 19712 0 0 2 0x40014200 systqmp 89078 435061 0 0 3 0x14200 bored systq 36326 58116 0 0 3 0x14200 tmoslp softclockmp 3396 473964 0 0 3 0x40014200 tmoslp softclock 2343 341182 0 0 3 0x40014200 idle0 1 314530 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 58429 (syz-executor) thread 0xffff8000ffffcf68 (313000) exclusive rrwlock inode r = 0 (0xfffffd8065677d00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3117 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c1c0c18) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3102 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10231 11078K 11301K 166960K 12388 0 pcb 18 12K 12K 166960K 149 0 rtable 163 6K 8K 166960K 499 0 pf 39 18K 21K 166960K 118 0 ifaddr 32 5K 7K 166960K 77 0 ifgroup 52 2K 2K 166960K 120 0 sysctl 3 1K 1K 166960K 3 0 counters 62 36K 37K 166960K 118 0 ioctlops 0 0K 4K 166960K 1597 0 iov 0 0K 16K 166960K 41 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1429 90K 90K 166960K 2199 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 46 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 959 0 sigio 0 0K 0K 166960K 5 0 proc 73 91K 128K 166960K 687 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 105 0 in_multi 63 4K 7K 166960K 150 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 205 917K 917K 166960K 205 0 exec 0 0K 1K 166960K 493 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 242 160K 177K 166960K 10221 0 UVM aobj 21 2K 2K 166960K 24 0 pinsyscall 42 84K 106K 166960K 2133 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 58 0 NDP 11 0K 2K 166960K 50 0 temp 78 8692K 8765K 166960K 49405 0 kqueue 14 20K 28K 166960K 149 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 81 0 78 1 0 1 1 0 8 0 rtentry 176 152 0 83 6 0 6 6 0 8 0 unpcb 144 690 0 670 2 1 1 2 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpcb 808 225 0 220 5 3 2 4 0 8 1 arp 128 26 0 12 1 0 1 1 0 8 0 inpcb 384 892 0 881 12 10 2 9 0 8 0 nd6 144 32 0 16 1 0 1 1 0 8 0 pkpcb 40 12 0 12 2 2 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 17 0 17 3 2 1 1 0 8 1 pppxif 1504 5 0 5 2 2 0 1 0 8 0 pfstscr 40 3 0 3 2 2 0 1 0 8 0 pffrag 232 7 0 5 1 0 1 1 0 482 0 pffrnode 88 7 0 5 1 0 1 1 0 8 0 pffrent 40 12 0 10 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 77 0 26 1 0 1 1 0 8 0 pfstkey 128 79 0 28 2 0 2 2 0 8 0 pfstate 384 77 0 26 6 0 6 6 0 8 0 pfrule 1344 26 0 20 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 611 0 317 29 6 23 29 0 8 3 art_table 32 614 0 317 4 0 4 4 0 8 0 art_node 16 149 0 88 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 21 0 3 1 0 1 1 0 8 0 dirhash 1024 28 0 11 3 0 3 3 0 8 0 dino2pl 256 3128 0 1621 96 0 96 96 0 8 0 ffsino 288 3128 0 1621 109 0 109 109 0 8 0 nchpl 144 4445 0 2752 64 0 64 64 0 8 0 uvmvnodes 80 3380 0 0 69 0 69 69 0 8 0 vnodes 216 3380 0 0 188 0 188 188 0 8 0 namei 1024 15014 0 15013 3 2 1 2 0 8 0 percpumem 16 74 0 28 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 60 0 38 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 13745 0 13744 10 9 1 8 1 8 0 plimitpl 152 180 0 162 1 0 1 1 0 8 0 sigapl 424 1273 0 1223 7 1 6 7 0 8 0 futexpl 64 12902 0 12901 1 0 1 1 0 8 0 knotepl 120 552 0 0 18 1 17 18 0 8 0 kqueuepl 224 341 0 330 6 5 1 5 0 8 0 pipepl 336 167 0 138 3 0 3 3 0 8 0 fdescpl 520 1248 0 1217 3 0 3 3 0 8 0 filepl 160 7532 0 7298 20 7 13 17 0 8 1 lockfpl 104 518 0 516 4 3 1 2 0 8 0 lockfspl 48 129 0 127 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 48 0 31 1 0 1 1 0 8 0 ucredpl 104 1139 0 1126 1 0 1 1 0 8 0 zombiepl 144 1225 0 1223 1 0 1 1 0 8 0 processpl 1192 1273 0 1223 5 0 5 5 0 8 0 procpl 656 2585 0 2528 7 1 6 7 0 8 0 srpgc 96 10 0 10 2 2 0 1 0 8 0 sosppl 168 7 0 7 4 3 1 1 0 8 1 sockpl 728 1687 0 1654 16 11 5 13 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 32 41 0 3 0 3 3 0 8 0 mtagpl 96 46 0 0 2 0 2 2 0 8 0 mbufpl 256 209 0 0 13 0 13 13 0 8 0 bufpl 280 4270 0 127 296 0 296 296 0 8 0 anonpl 32 7517 0 0 61 0 61 61 0 246 0 amapchunkpl 152 33686 0 33145 34 6 28 28 0 158 4 amappl16 200 3500 0 3463 26 19 7 15 0 8 1 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 150 0 138 1 0 1 1 0 8 0 amappl13 176 29 0 29 2 2 0 1 0 8 0 amappl12 168 1945 0 1914 3 1 2 2 0 8 0 amappl11 160 89 0 75 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 117 0 105 1 0 1 1 0 8 0 amappl6 120 213 0 209 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 347 0 327 1 0 1 1 0 8 0 amappl3 96 6683 0 6571 5 1 4 4 0 8 0 amappl2 88 676 0 612 2 0 2 2 0 8 0 amappl1 80 11759 0 11147 16 3 13 16 0 8 0 amappl 88 9347 0 9177 6 1 5 5 0 92 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 dma512 512 2 0 2 1 1 0 1 0 8 0 dma256 256 6 0 6 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 23 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1248 0 1217 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1248 0 1217 1 0 1 1 0 8 0 vmmpekpl 168 10935 0 10887 3 0 3 3 0 8 0 vmmpepl 168 82414 0 80392 101 7 94 96 0 357 0 vmsppl 480 1247 0 1217 5 1 4 5 0 8 0 rwobjpl 72 26066 0 21713 82 1 81 81 0 8 0 pdppl 4096 2503 0 2434 101 30 71 83 0 8 2 pvpl 32 14931 0 0 123 2 121 121 0 265 0 pmappl 256 1247 0 1217 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 394 0 46 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83869ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003b40c230,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x73ee5cb92580, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83869ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(2) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8392b5e0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80003b40c230,ffff800000079f00) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x73ee5cb92580, count: -9 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71780bffb930, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71780bffb930, count: -1