uvm_fault(0xfffffd806e3991f0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff819a50e0 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a327fc0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff819a50e0 Starting stack trace... panic(ffffffff8333cefc) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a327f10) at kerntrap+0x2cb sys/arch/amd64/amd64/trap.c:482 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001637000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff80003c477228) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c477228) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3280c0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80723a4e58,81,fffffd80097fb680,ffff80003c477228) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c8515c0,ffff80003c477228) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c8515c0,ffff80003c477228) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c8515c0,ffff80003c477228) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806c8515c0,ffff80003c477228) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c477228) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c477228,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80003c477228,ffff80002a328430,ffff80002a328380) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a328430) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a328430) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75f8ab6e4d10, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 27572 60044 0 0 0 1 syz-executor 21599 58436 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70cf72c1baf0, 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}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806e3991f0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70cf72c1baf0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3c2ca0 rbx 0 rdx 0 rcx 0xffff80003c4767e8 rax 0x2a r8 0xffff80002a3c2bd0 r9 0x1 r10 0x1d74e1eb7791f234 r11 0x97539bb9f32e661 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8191f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3c2c20 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=27572 pid=60044 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=0xffff80003c477228,0xffff80003c476d18 process=0xffff80003c410020 user=0xffff80002a3bd000, vmspace=0xfffffd806e3993d0 estcpu=36, cpticks=3, pctcpu=0.0, user=1, sys=1, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *60044 27572 49637 0 7 0 syz-executor 60044 76533 49637 0 3 0x4000080 fsleep syz-executor 86651 46685 47414 0 3 0x82 nanoslp syz-executor 35485 451376 87053 0 3 0x1 inode syz-executor 35485 384012 87053 0 3 0x4000080 sbwait syz-executor 6786 392857 39076 0 3 0x1 inode syz-executor 6786 161351 39076 0 3 0x4000080 kqsel syz-executor 6786 102762 39076 0 3 0x4000080 fsleep syz-executor 77536 455504 37377 0 3 0x1 inode syz-executor 77536 490856 37377 0 3 0x4000080 ttyout syz-executor 77536 390574 37377 0 3 0x4000080 fsleep syz-executor 49637 505593 47414 0 3 0x3 inode syz-executor 47279 54016 0 0 3 0x14200 acct acct 87053 392987 47414 0 3 0x82 nanoslp syz-executor 75121 124702 1 0 3 0x100083 ttyin getty 37377 156917 47414 0 3 0x3 inode syz-executor 16038 366094 47414 0 3 0x10000003 inode syz-executor 39076 513670 47414 0 3 0x82 nanoslp syz-executor 28779 338745 47414 0 3 0x2 biowait syz-executor 87678 197324 47414 0 3 0x3 inode syz-executor 21538 375726 0 0 3 0x14200 bored sosplice 47414 496304 99002 0 3 0x82 kqread syz-executor 99002 421029 93260 0 3 0x10008a sigsusp ksh 93260 22162 33922 0 3 0x98 kqread sshd-session 33922 374944 41973 0 3 0x92 kqread sshd-session 41973 116496 1 0 3 0x88 kqread sshd 16571 173974 99565 74 3 0x1100092 bpf pflogd 99565 35285 1 0 3 0x80 sbwait pflogd 98990 86092 69069 73 3 0x1100090 kqread syslogd 69069 514037 1 0 3 0x100082 sbwait syslogd 95089 94266 1 0 3 0x100080 kqread resolvd 45411 424759 22407 77 3 0x100092 kqread dhcpleased 12934 417196 22407 77 3 0x100092 kqread dhcpleased 22407 466298 1 0 3 0x80 kqread dhcpleased 45289 111946 0 0 3 0x14200 bored smr 55896 242892 0 0 2 0x14200 zerothread 21200 249702 0 0 3 0x14200 aiodoned aiodoned 15128 339920 0 0 3 0x14200 syncer update 28170 218104 0 0 3 0x14200 cleaner cleaner 58436 21599 0 0 7 0x14200 reaper 18736 270922 0 0 3 0x14200 pgdaemon pagedaemon 10945 351159 0 0 3 0x14200 bored viomb 35885 207835 0 0 3 0x40014200 acpi0 acpi0 44609 87222 0 0 3 0x40014200 idle1 94752 6417 0 0 3 0x14200 bored softnet3 59336 450423 0 0 3 0x14200 bored softnet2 94255 438423 0 0 3 0x14200 bored softnet1 15422 497790 0 0 3 0x14200 bored softnet0 78036 85228 0 0 2 0x40014200 systqmp 60726 449686 0 0 3 0x14200 bored systq 63540 457648 0 0 3 0x14200 tmoslp softclockmp 63582 13535 0 0 3 0x40014200 tmoslp softclock 30929 473681 0 0 3 0x40014200 idle0 1 170489 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff839868a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36f sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:285 #6 reaper+0x1cb sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 28779 (syz-executor) thread 0xffff8000ffff02b0 (338745) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10292 11277K 12540K 166960K 24810 0 pcb 19 18K 21K 166960K 1724 0 rtable 341 19K 20K 166960K 2434 0 pf 54 21K 84K 166960K 555 0 ifaddr 69 15K 15K 166960K 420 0 ifgroup 68 2K 3K 166960K 704 0 sysctl 4 1K 9K 166960K 88 0 counters 74 37K 38K 166960K 982 0 ioctlops 0 0K 4K 166960K 3512 0 iov 1 0K 28K 166960K 627 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1481 93K 94K 166960K 8847 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 72K 108K 166960K 169 0 VM map 2 1K 1K 166960K 2 0 sem 25 80K 120K 166960K 172 0 dirhash 15 2K 3K 166960K 183 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 7614 0 sigio 1 0K 0K 166960K 413 0 proc 72 91K 128K 166960K 1928 0 subproc 72 4K 6K 166960K 279 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1345 0 in_multi 56 4K 7K 166960K 617 0 ether_multi 1 0K 0K 166960K 133 0 mrt 1 0K 0K 166960K 69 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 1836 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 19 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 233 160K 178K 166960K 69218 0 UVM aobj 381 15K 15K 166960K 402 0 pinsyscall 41 82K 103K 166960K 9304 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 369 0 NDP 17 0K 2K 166960K 272 0 temp 85 8696K 8952K 166960K 336195 0 kqueue 16 24K 39K 166960K 1496 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 1057 0 1054 13 12 1 3 0 8 0 rtentry 176 803 0 665 8 0 8 8 0 8 0 unpcb 144 5450 0 5432 28 24 4 6 0 8 3 syncache 336 23 0 23 7 7 0 1 0 8 0 tcpqe 32 4 0 4 3 3 0 1 0 8 0 tcpcb 736 2347 0 2341 33 31 2 7 0 8 1 arp 128 225 0 141 3 0 3 3 0 8 0 inpcb 328 9122 0 9110 52 45 7 12 0 8 5 nd6 144 111 0 96 2 0 2 2 0 8 0 pkpcb 40 289 0 289 6 6 0 1 0 8 0 kcovpl 48 27 0 19 1 0 1 1 0 8 0 mppekey 1024 16 0 16 8 8 0 1 0 8 0 ppxss 1192 365 0 365 3 2 1 1 0 8 1 pppxif 1504 119 0 119 7 6 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 86 0 72 1 0 1 1 0 482 0 pffrnode 88 70 0 57 1 0 1 1 0 8 0 pffrent 40 192 0 175 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 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 59 0 45 1 0 1 1 0 8 0 pfstkey 128 65 0 52 1 0 1 1 0 8 0 pfstate 384 60 0 49 4 1 3 3 0 8 0 pfrule 1344 38 0 25 3 1 2 2 0 8 0 rttmr 136 12 0 12 7 7 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 2118 0 1855 46 20 26 31 0 8 2 art_table 32 2122 0 1855 4 0 4 4 0 8 0 art_node 16 770 0 715 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 161 0 138 1 0 1 1 0 8 0 shmpl 112 399 0 21 11 0 11 11 0 8 0 dirhash 1024 131 0 112 3 0 3 3 0 8 0 dino2pl 256 15765 0 14215 98 0 98 98 0 8 0 ffsino 288 15765 0 14215 111 0 111 111 0 8 0 nchpl 144 26157 0 25531 64 38 26 64 0 8 0 rtmask 32 41 0 41 9 8 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 95154 0 95154 10 9 1 3 0 8 1 percpumem 16 506 0 454 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 440 0 404 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 26 0 26 9 8 1 1 0 8 1 scxspl 216 193275 0 193273 28 25 3 8 1 8 2 plimitpl 152 2102 0 2084 1 0 1 1 0 8 0 sigapl 424 7937 0 7886 10 3 7 9 0 8 0 knotepl 120 681 0 0 18 0 18 18 0 8 0 kqueuepl 224 3044 0 3031 26 24 2 5 0 8 0 pipepl 336 1162 0 1135 22 14 8 9 0 8 4 fdescpl 520 7882 0 7852 3 0 3 3 0 8 0 filepl 160 58810 0 58580 50 32 18 21 0 8 2 lockfpl 104 4748 0 4746 7 6 1 2 0 8 0 lockfspl 48 2080 0 2078 1 0 1 1 0 8 0 sessionpl 144 63 0 54 1 0 1 1 0 8 0 pgrppl 48 235 0 218 1 0 1 1 0 8 0 ucredpl 104 11055 0 11039 1 0 1 1 0 8 0 zombiepl 144 9068 0 9065 1 0 1 1 0 8 0 processpl 1240 7937 0 7886 6 1 5 6 0 8 0 procpl 656 20820 0 20763 11 4 7 10 0 8 0 srpgc 96 68 0 68 11 10 1 1 0 8 1 sosppl 168 71 0 71 4 3 1 1 0 8 1 sockpl 728 16127 0 16094 89 79 10 22 0 8 6 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 135 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 129 0 0 10 1 9 10 0 8 0 mtagpl 96 191 0 0 5 0 5 5 0 8 0 mbufpl 256 1385 0 0 84 0 84 84 0 8 0 bufpl 280 83120 0 76978 440 0 440 440 0 8 0 anonpl 32 17701 0 0 143 0 143 143 0 246 0 amapchunkpl 152 249906 0 249362 75 44 31 41 0 158 4 amappl16 200 30759 0 30679 211 186 25 40 0 8 8 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 192 0 179 1 0 1 1 0 8 0 amappl13 176 41 0 41 3 3 0 1 0 8 0 amappl12 168 8862 0 8832 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 256 0 255 2 1 1 1 0 8 0 amappl8 136 67 0 64 1 0 1 1 0 8 0 amappl7 128 205 0 192 1 0 1 1 0 8 0 amappl6 120 382 0 378 1 0 1 1 0 8 0 amappl5 112 207 0 196 1 0 1 1 0 8 0 amappl4 104 452 0 431 1 0 1 1 0 8 0 amappl3 96 51775 0 51670 5 1 4 4 0 8 0 amappl2 88 1081 0 1016 2 0 2 2 0 8 0 amappl1 80 45389 0 44785 16 1 15 15 0 8 0 amappl 88 66775 0 66614 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 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 10 0 10 5 5 0 1 0 8 0 dma128 128 264 0 264 9 8 1 1 0 8 1 dma64 64 12 0 12 6 6 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 25 0 24 1 0 1 1 0 8 0 aobjpl 72 401 0 21 7 0 7 7 0 8 0 uaddrrnd 24 7882 0 7852 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7882 0 7852 1 0 1 1 0 8 0 vmmpekpl 168 60456 0 60403 4 0 4 4 0 8 0 vmmpepl 168 504266 0 502230 211 88 123 127 0 357 14 vmsppl 480 7881 0 7852 6 1 5 5 0 8 1 rwobjpl 72 131841 0 124542 171 26 145 146 0 8 2 pdppl 4096 15771 0 15704 165 92 73 85 0 8 6 pvpl 32 29468 0 0 238 1 237 237 0 265 0 pmappl 256 7881 0 7852 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 633 0 191 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838b6ff0) 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 __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 sys/dev/kcov.c:230 mtx_leave(ffffffff838599a0) at mtx_leave+0x49 sys/kern/kern_lock.c:364 msleep_nsec(ffffffff838599d8,ffffffff838599a0,4,ffffffff833e9846,ffffffffffffffff) at msleep_nsec+0x1ad sys/kern/kern_synch.c:202 reaper(ffff8000ffffd718) at reaper+0x14b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff838b6ff0) 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 __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x35 sys/dev/kcov.c:230 mtx_leave(ffffffff838599a0) at mtx_leave+0x49 sys/kern/kern_lock.c:364 msleep_nsec(ffffffff838599d8,ffffffff838599a0,4,ffffffff833e9846,ffffffffffffffff) at msleep_nsec+0x1ad sys/kern/kern_synch.c:202 reaper(ffff8000ffffd718) at reaper+0x14b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70cf72c1baf0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70cf72c1baf0, count: -1