uvm_fault(0xfffffd806cd8a3f8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff811a0a78 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c450d10 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff811a0a78 Starting stack trace... panic(ffffffff8339b0e1) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c450c60) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000148b000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a3b9500) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a3b9500) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c450e10) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806e0f99a0,81,fffffd80097fb548,ffff80002a3b9500) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069c4ca30,ffff80002a3b9500) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069c4ca30,ffff80002a3b9500) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069c4ca30,ffff80002a3b9500) at fdrop+0x121 sys/kern/kern_descrip.c:1267 closef(fffffd8069c4ca30,ffff80002a3b9500) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a3b9500) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a3b9500,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a3b9500,ffff80003c451180,ffff80003c4510d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c451180) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c451180) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77ff18621660, 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 *171501 66181 0 0 0 1 syz-executor 522486 22778 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x73f42900b8f0, 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(0xfffffd806cd8a3f8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x73f42900b8f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800038421680 rbx 0 rdx 0 rcx 0xffff80003c03b250 rax 0x2a r8 0xffff8000384215b0 r9 0x1 r10 0x7950798eac1461b r11 0xa6611f0999709e1a r12 0 r13 0xffffffff81215238 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8311d4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800038421600 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=171501 pid=66181 tcnt=3 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=0xffff80003c03bcb0,0xffff80003c03ad30 process=0xffff80003c4aec08 user=0xffff80003841c000, vmspace=0xfffffd806ef913d8 estcpu=36, cpticks=9, pctcpu=0.0, user=9, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92096 4356 46846 0 2 0 syz-executor 92096 127283 46846 0 3 0x4000080 fsleep syz-executor 27992 321858 94871 0 2 0 syz-executor 27992 413775 94871 0 3 0x4000080 fsleep syz-executor *66181 171501 26371 0 7 0 syz-executor 66181 347962 26371 0 3 0x4000080 sbwait syz-executor 66181 523726 26371 0 3 0x4000080 fsleep syz-executor 67236 371806 77170 0 3 0x80 nanoslp syz-executor 67236 69972 77170 0 3 0x4000080 sbwait syz-executor 67236 176971 77170 0 3 0x4000080 fsleep syz-executor 90243 448257 95867 0 3 0x80 nanoslp syz-executor 90243 238235 95867 0 3 0x4000080 kqpoll syz-executor 90243 428478 95867 0 3 0x4000080 fsleep syz-executor 86117 157695 1 0 3 0x100083 ttyin getty 52616 324745 71795 0 3 0x82 nanoslp syz-executor 94871 149542 71795 0 3 0x82 nanoslp syz-executor 46846 294482 71795 0 3 0x82 nanoslp syz-executor 8457 254548 71795 0 3 0x82 nanoslp syz-executor 95867 251960 71795 0 3 0x82 nanoslp syz-executor 94520 303365 0 0 3 0x14200 bored sosplice 26371 303537 71795 0 3 0x82 nanoslp syz-executor 72610 432955 71795 0 3 0x82 wait syz-executor 77170 155458 71795 0 3 0x82 nanoslp syz-executor 71795 265577 95517 0 3 0x82 kqread syz-executor 95517 415655 66309 0 3 0x10008a sigsusp ksh 66309 96934 16823 0 3 0x98 kqread sshd-session 16823 345493 14646 0 3 0x92 kqread sshd-session 14646 362944 1 0 3 0x88 kqread sshd 29626 1379 67337 74 3 0x1100092 bpf pflogd 67337 190795 1 0 3 0x80 sbwait pflogd 38245 506228 95553 73 3 0x1100090 kqread syslogd 95553 515993 1 0 3 0x100082 sbwait syslogd 22762 194858 1 0 3 0x100080 kqread resolvd 91529 160858 44941 77 3 0x100092 kqread dhcpleased 12104 156989 44941 77 3 0x100092 kqread dhcpleased 44941 368335 1 0 3 0x80 kqread dhcpleased 70472 326000 0 0 3 0x14200 bored smr 92545 176532 0 0 2 0x14200 zerothread 20487 357285 0 0 3 0x14200 aiodoned aiodoned 48556 102185 0 0 3 0x14200 syncer update 67208 236307 0 0 3 0x14200 cleaner cleaner 22778 522486 0 0 7 0x14200 reaper 6456 391635 0 0 3 0x14200 pgdaemon pagedaemon 80298 126241 0 0 3 0x14200 bored viomb 7419 274996 0 0 3 0x40014200 acpi0 acpi0 68081 253283 0 0 3 0x40014200 idle1 1469 461690 0 0 3 0x14200 bored softnet7 62283 142977 0 0 3 0x14200 bored softnet6 44102 185547 0 0 3 0x14200 bored softnet5 57595 367996 0 0 3 0x14200 bored softnet4 54743 314750 0 0 3 0x14200 bored softnet3 75641 363382 0 0 3 0x14200 bored softnet2 48903 234926 0 0 3 0x14200 bored softnet1 13206 231277 0 0 3 0x14200 bored softnet0 55984 338314 0 0 2 0x14200 systqmp 94269 84860 0 0 3 0x14200 bored systq 55404 20233 0 0 3 0x14200 tmoslp softclockmp 79613 296539 0 0 3 0x40014200 tmoslp softclock 33576 255034 0 0 3 0x40014200 idle0 1 393800 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 (0xffffffff839a3800) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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+0x36b sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10233 11146K 12357K 166960K 14552 0 pcb 17 16K 18K 166960K 1079 0 rtable 232 15K 16K 166960K 752 0 pf 43 19K 67486K 166960K 339 0 ifaddr 40 7K 8K 166960K 207 0 ifgroup 67 2K 3K 166960K 372 0 sysctl 4 1K 9K 166960K 22 0 counters 74 37K 38K 166960K 458 0 ioctlops 0 0K 4K 166960K 1975 0 iov 1 2K 32K 166960K 249 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1515 95K 95K 166960K 4654 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 32K 40K 166960K 51 0 VM map 2 1K 1K 166960K 2 0 sem 31 17K 17K 166960K 154 0 dirhash 12 2K 3K 166960K 96 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 3724 0 sigio 1 0K 0K 166960K 121 0 proc 72 115K 180K 166960K 1220 0 subproc 72 4K 4K 166960K 128 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 748 0 in_multi 69 5K 7K 166960K 282 0 ether_multi 1 0K 0K 166960K 35 0 mrt 0 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 1068 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 266 169K 189K 166960K 34864 0 UVM aobj 13 4K 4K 166960K 15 0 pinsyscall 43 86K 100K 166960K 5008 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 190 0 NDP 14 0K 2K 166960K 155 0 temp 80 8648K 8904K 166960K 185030 0 kqueue 18 28K 38K 166960K 706 0 SYN cache 2 8K 16K 166960K 3 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 120 468 0 465 5 4 1 3 0 8 0 rtentry 176 244 0 162 5 0 5 5 0 8 0 unpcb 144 3175 0 3152 25 23 2 7 0 8 1 syncache 336 21 0 21 5 4 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 1695 0 1688 27 20 7 7 0 8 6 arp 128 33 0 20 1 0 1 1 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 6 0 6 2 2 0 1 0 8 0 inpcb 328 5079 0 5032 43 36 7 12 0 8 3 nd6 144 42 0 24 1 0 1 1 0 8 0 pkpcb 40 87 0 87 7 6 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 mppekey 1024 3 0 3 1 1 0 1 0 8 0 ppxss 1192 164 0 163 4 3 1 1 0 8 0 pppxif 1504 13 0 12 5 4 1 1 0 8 0 pffrag 232 23 0 13 1 0 1 1 0 482 0 pffrnode 88 22 0 12 1 0 1 1 0 8 0 pffrent 40 36 0 26 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 221 0 79 1 0 1 1 0 8 0 pfstkey 128 221 0 79 5 0 5 5 0 8 0 pfstate 384 221 0 79 15 0 15 15 0 8 0 pfrule 1344 27 0 21 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1175 0 829 42 12 30 33 0 8 2 art_table 40 1179 0 829 6 0 6 6 0 8 0 art_node 32 240 0 174 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 149 0 120 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 74 0 57 3 0 3 3 0 8 0 dino2pl 256 8689 0 7171 97 1 96 96 0 8 0 ffsino 296 8689 0 7171 119 1 118 118 0 8 0 nchpl 144 13853 0 12139 64 0 64 64 0 8 0 rtmask 32 47 0 47 7 6 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 49196 0 49196 7 6 1 2 0 8 1 percpumem 16 244 0 192 1 0 1 1 0 8 0 kstatmem 264 258 0 226 7 4 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 22 0 22 7 6 1 1 0 8 1 scxspl 216 83041 0 83041 22 18 4 8 1 8 4 plimitpl 152 752 0 733 1 0 1 1 0 8 0 sigapl 424 4017 0 3962 9 1 8 9 0 8 0 knotepl 120 827 0 0 24 0 24 24 0 8 0 kqueuepl 224 1710 0 1696 23 22 1 9 0 8 0 pipepl 344 574 0 547 12 9 3 6 0 8 0 fdescpl 528 3966 0 3934 3 0 3 3 0 8 0 filepl 160 29797 0 29525 47 32 15 20 0 8 3 lockfpl 104 1763 0 1759 4 3 1 2 0 8 0 lockfspl 48 495 0 491 1 0 1 1 0 8 0 sessionpl 144 48 0 39 1 0 1 1 0 8 0 pgrppl 48 221 0 204 1 0 1 1 0 8 0 ucredpl 104 5788 0 5775 1 0 1 1 0 8 0 zombiepl 144 4715 0 4712 1 0 1 1 0 8 0 processpl 1248 4017 0 3962 6 0 6 6 0 8 0 procpl 664 10055 0 9992 9 1 8 9 0 8 0 sosppl 168 20 0 19 4 3 1 1 0 8 0 sockpl 752 8979 0 8906 110 99 11 24 0 8 3 mcl64k 65536 26 0 0 4 0 4 4 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 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 115 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 52 0 0 6 0 6 6 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 1235 0 0 72 0 72 72 0 8 0 bufpl 280 34917 0 28774 440 0 440 440 0 8 0 anonpl 32 14729 0 0 119 0 119 119 0 246 0 amapchunkpl 152 120898 0 120269 69 42 27 36 0 158 2 amappl16 200 12775 0 12684 111 93 18 34 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 165 0 153 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 4724 0 4691 3 1 2 2 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 11 0 10 2 1 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 46 0 43 1 0 1 1 0 8 0 amappl7 128 220 0 207 1 0 1 1 0 8 0 amappl6 120 254 0 250 1 0 1 1 0 8 0 amappl5 112 157 0 147 1 0 1 1 0 8 0 amappl4 104 402 0 381 1 0 1 1 0 8 0 amappl3 96 25135 0 25007 5 1 4 4 0 8 0 amappl2 88 863 0 798 2 0 2 2 0 8 0 amappl1 80 26761 0 26155 16 1 15 15 0 8 0 amappl 88 33352 0 33159 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 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 262 0 262 7 6 1 1 0 8 1 dma64 64 13 0 13 7 6 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 3966 0 3934 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3966 0 3934 1 0 1 1 0 8 0 vmmpekpl 168 31758 0 31700 5 1 4 4 0 8 0 vmmpepl 168 253851 0 251699 175 70 105 119 0 357 1 vmsppl 488 3965 0 3934 7 2 5 5 0 8 0 rwobjpl 80 70096 0 63117 167 19 148 155 0 8 2 pdppl 4096 7939 0 7868 133 60 73 85 0 8 2 pvpl 32 24336 0 0 195 0 195 195 0 265 0 pmappl 256 3965 0 3934 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 426 0 109 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8380dff0) 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(ffffffff837ec600,ffffffff837ec600) at __sanitizer_cov_trace_const_cmp4+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff837ec600,ffffffff837ec600) at __sanitizer_cov_trace_const_cmp4+0x16 sys/dev/kcov.c:230 msleep_nsec(ffffffff837ec638,ffffffff837ec600,4,ffffffff833802e8,ffffffffffffffff) at msleep_nsec+0x19b sys/kern/kern_synch.c:202 reaper(ffff8000ffffca68) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8380dff0) 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(ffffffff837ec600,ffffffff837ec600) at __sanitizer_cov_trace_const_cmp4+0x16 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff837ec600,ffffffff837ec600) at __sanitizer_cov_trace_const_cmp4+0x16 sys/dev/kcov.c:230 msleep_nsec(ffffffff837ec638,ffffffff837ec600,4,ffffffff833802e8,ffffffffffffffff) at msleep_nsec+0x19b sys/kern/kern_synch.c:202 reaper(ffff8000ffffca68) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -6 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: 0x73f42900b8f0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x73f42900b8f0, count: -1