uvm_fault(0xfffffd805cee2210, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82993e38 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800034be1e40 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82993e38 Starting stack trace... panic(ffffffff833a1c27) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800034be1d90) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001480000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,1,2000,ffff80003bc0afb8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80003bc0afb8) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800034be1f40) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807bc8f640,1,fffffd80097fb138,ffff80003bc0afb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ae16858,ffff80003bc0afb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ae16858,ffff80003bc0afb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ae16858,ffff80003bc0afb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806ae16858,ffff80003bc0afb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003bc0afb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003bc0afb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003bc0afb8,ffff800034be22b0,ffff800034be2200) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034be22b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034be22b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ff0b4692ac0, count: 242 End of stack trace. WA RNING: SPL NOT LOWERED ON SYSCALL 83 815646848 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *148215 88591 60929 0x10 0x4000000 1 syz-executor 15559 95969 0 0x1000 0x4080000 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x636a1c8a0, 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(0xfffffd805cee2210, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x636a1c8a0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c41e3b0 rbx 0 rdx 0 rcx 0xffff80002a270018 rax 0x3a r8 0xffff80003c41e2e0 r9 0x1 r10 0x62a5b5455a6bda68 r11 0xebb013f30f7c19d5 r12 0 r13 0 r14 0xffff80002a270018 r15 0 rip 0xffffffff82e9a3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c41e330 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=148215 pid=88591 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bbf1a10,0xffff80002a270d20 process=0xffff80003c4209c0 user=0xffff80003c419000, vmspace=0xfffffd805cee23f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88591 209042 21560 60929 2 0x10 syz-executor 88591 38550 21560 60929 3 0x4000090 fsleep syz-executor *88591 148215 21560 60929 7 0x4000010 syz-executor 88591 201496 21560 60929 3 0x4000090 fsleep syz-executor 24363 436758 58949 0 2 0x10 syz-executor 24363 150545 58949 0 3 0x4000090 fsleep syz-executor 47856 298163 27911 0 2 0 syz-executor 47856 455613 27911 0 3 0x4000080 lockf syz-executor 47856 337273 27911 0 2 0x4000000 syz-executor 25784 311484 78689 0 2 0 syz-executor 25784 512461 78689 0 2 0x4000000 syz-executor 25784 206500 78689 0 3 0x4000000 inode syz-executor 25784 407462 78689 0 3 0x4000000 inode syz-executor 25784 297775 78689 0 3 0x4000000 inode syz-executor 96166 16166 12758 0 2 0xc80 syz-executor 96166 409931 12758 0 3 0x4000080 ttyin syz-executor 96166 48996 12758 0 3 0x4000080 fsleep syz-executor 95969 494094 4736 0 3 0x3000 suspend syz-executor 95969 152437 4736 0 2 0x4081000 syz-executor 95969 15559 4736 0 7 0x4081000 syz-executor 4736 50101 58363 0 2 0xc82 syz-executor 22166 449264 77574 0 3 0x403000 suspend syz-executor 22166 5545 77574 0 2 0x4481000 syz-executor 85712 403227 0 0 3 0x14200 acct acct 49696 325057 0 0 3 0x14200 bored sosplice 21560 98795 58363 0 2 0xc82 syz-executor 58778 443011 58363 0 2 0xc82 syz-executor 58949 149705 58363 0 2 0xc82 syz-executor 78689 37245 58363 0 2 0xc82 syz-executor 27911 310851 58363 0 2 0x2 syz-executor 12758 145871 58363 0 2 0xc82 syz-executor 77574 125310 58363 0 3 0x82 wait syz-executor 58363 95194 10298 0 3 0x82 kqread syz-executor 10298 322788 75286 0 3 0x10008a sigsusp ksh 75286 215747 63550 0 3 0x98 kqread sshd-session 63550 227824 67479 0 3 0x92 kqread sshd-session 7020 172158 1 0 2 0x100083 getty 67479 323868 1 0 3 0x88 kqread sshd 81608 221862 68341 74 3 0x1100092 bpf pflogd 68341 25418 1 0 3 0x80 sbwait pflogd 74665 215830 37105 73 3 0x1100090 kqread syslogd 37105 489314 1 0 3 0x100082 sbwait syslogd 86252 443895 1 0 3 0x100080 kqread resolvd 3601 461389 39455 77 3 0x100092 kqread dhcpleased 3555 238353 39455 77 3 0x100092 kqread dhcpleased 39455 284178 1 0 3 0x80 kqread dhcpleased 48275 267636 0 0 3 0x14200 bored smr 58686 380884 0 0 3 0x14200 pgzero zerothread 57123 392560 0 0 3 0x14200 aiodoned aiodoned 58700 121419 0 0 3 0x14200 syncer update 99132 454374 0 0 3 0x14200 cleaner cleaner 7038 415818 0 0 3 0x14200 reaper reaper 41801 128787 0 0 3 0x14200 pgdaemon pagedaemon 7713 436136 0 0 3 0x14200 bored viomb 8919 472811 0 0 3 0x40014200 acpi0 acpi0 61236 105356 0 0 3 0x40014200 idle1 69281 323426 0 0 3 0x14200 bored softnet1 41725 485836 0 0 2 0x14200 softnet0 60443 257297 0 0 2 0x14200 systqmp 57921 518238 0 0 3 0x14200 bored systq 31815 484003 0 0 3 0x14200 netlock softclockmp 11487 15324 0 0 3 0x40014200 tmoslp softclock 17704 49552 0 0 3 0x40014200 idle0 1 431660 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 25784 (syz-executor) thread 0xffff80003bc0bcb0 (512461) exclusive rrwlock inode r = 0 (0xfffffd806e1998b8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 Process 25784 (syz-executor) thread 0xffff80003bc0b780 (206500) exclusive rrwlock inode r = 0 (0xfffffd806b06f8f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f1 sys/kern/vfs_vnops.c:107 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #10 Xsyscall+0x128 Process 95969 (syz-executor) thread 0xffff80002a270a78 (152437) exclusive rrwlock inode r = 0 (0xfffffd806e984930) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 Process 22166 (syz-executor) thread 0xffff80002a2702b0 (5545) exclusive rrwlock inode r = 0 (0xfffffd806b06fec0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 11069K 11415K 166960K 12285 0 pcb 18 14K 15K 166960K 136 0 rtable 240 9K 9K 166960K 351 0 pf 35 17K 81K 166960K 112 0 ifaddr 43 7K 8K 166960K 81 0 ifgroup 55 2K 2K 166960K 130 0 sysctl 3 1K 9K 166960K 76 0 counters 68 36K 37K 166960K 148 0 ioctlops 0 0K 4K 166960K 1577 0 iov 0 0K 32K 166960K 48 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1373 86K 86K 166960K 1971 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 22 253K 253K 166960K 31 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 818 0 sigio 0 0K 0K 166960K 9 0 proc 72 115K 164K 166960K 633 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 101 0 in_multi 99 7K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 482 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 270 176K 190K 166960K 9007 0 UVM aobj 23 4K 4K 166960K 23 0 pinsyscall 43 86K 106K 166960K 1909 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 12 0K 2K 166960K 57 0 temp 64 8648K 8902K 166960K 40037 0 kqueue 13 20K 30K 166960K 158 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 69 0 65 1 0 1 1 0 8 0 rtentry 176 121 0 18 5 0 5 5 0 8 0 unpcb 144 367 0 344 3 1 2 2 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 384 0 379 16 9 7 7 0 8 6 arp 136 13 0 1 1 0 1 1 0 8 0 inpcb 328 887 0 877 23 16 7 12 0 8 6 nd6 152 25 0 4 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 32 0 32 2 1 1 1 0 8 1 pppxif 1504 5 0 5 2 1 1 1 0 8 1 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 5 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfstitem 24 56 0 2 1 0 1 1 0 8 0 pfstkey 128 56 0 2 2 0 2 2 0 8 0 pfstate 384 56 0 2 6 0 6 6 0 8 0 pfrule 1344 22 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 573 0 124 31 1 30 30 0 8 1 art_table 40 575 0 124 5 0 5 5 0 8 0 art_node 32 120 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semapl 112 25 0 5 1 0 1 1 0 8 0 shmpl 112 20 0 0 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2851 0 1343 96 0 96 96 0 8 0 ffsino 296 2851 0 1343 117 0 117 117 0 8 0 nchpl 144 4003 0 2304 65 1 64 64 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 uvmvnodes 80 3258 0 0 67 0 67 67 0 8 0 vnodes 216 3258 0 0 181 0 181 181 0 8 0 namei 1024 13923 0 13920 3 2 1 2 0 8 0 percpumem 16 89 0 40 1 0 1 1 0 8 0 kstatmem 264 78 0 52 4 1 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 25089 0 25089 12 4 8 8 1 8 8 plimitpl 152 239 0 217 1 0 1 1 0 8 0 sigapl 424 1107 0 1057 7 1 6 7 0 8 0 knotepl 120 321 0 0 10 0 10 10 0 8 0 kqueuepl 224 307 0 297 4 1 3 3 0 8 2 pipepl 344 169 0 141 3 0 3 3 0 8 0 fdescpl 528 1083 0 1051 3 0 3 3 0 8 0 filepl 160 6710 0 6472 27 14 13 19 0 8 1 lockfpl 104 647 0 643 5 3 2 4 0 8 1 lockfspl 48 173 0 170 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 1013 0 998 1 0 1 1 0 8 0 zombiepl 144 1060 0 1057 3 2 1 1 0 8 0 processpl 1232 1107 0 1057 5 0 5 5 0 8 1 procpl 664 2327 0 2262 6 0 6 6 0 8 0 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 752 1345 0 1308 30 20 10 16 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 228 0 0 15 0 15 15 0 8 0 bufpl 280 10702 0 4559 439 0 439 439 0 8 0 anonpl 32 10791 0 0 87 0 87 87 0 246 0 amapchunkpl 152 29480 0 28886 45 19 26 32 0 158 3 amappl16 200 4350 0 3979 50 27 23 25 0 8 3 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 111 0 99 1 0 1 1 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 1742 0 1710 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 21 0 19 1 0 1 1 0 8 0 amappl7 128 107 0 95 1 0 1 1 0 8 0 amappl6 120 188 0 185 1 0 1 1 0 8 0 amappl5 112 125 0 116 1 0 1 1 0 8 0 amappl4 104 297 0 277 1 0 1 1 0 8 0 amappl3 96 5124 0 5007 3 0 3 3 0 8 0 amappl2 88 1320 0 1240 2 0 2 2 0 8 0 amappl1 80 10924 0 10309 16 2 14 15 0 8 0 amappl 88 8220 0 8026 5 0 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 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 7 0 7 2 2 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 22 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1083 0 1051 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1083 0 1051 1 0 1 1 0 8 0 vmmpekpl 168 10039 0 9998 3 0 3 3 0 8 0 vmmpepl 168 73540 0 71114 127 18 109 109 0 357 3 vmsppl 488 1082 0 1051 6 1 5 5 0 8 0 rwobjpl 80 25117 0 20513 94 0 94 94 0 8 0 pdppl 4096 2174 0 2102 106 32 74 88 0 8 2 pvpl 32 21350 0 0 173 0 173 173 0 265 0 pmappl 256 1082 0 1051 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 47 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837dcff0) 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_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 intr_handler(ffff80003c478e20,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83946b68) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83946b68) at __mp_lock+0x199 sys/kern/kern_lock.c:165 uvn_io(fffffd805d1c0330,ffff80003c479040,1,202,0) at uvn_io+0x3d4 sys/uvm/uvm_vnode.c:1252 uvn_get(fffffd805d1c0330,0,ffff80003c479118,ffff80003c4790fc,0,1,68b801b87a59872a,1) at uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 uvm_fault_lower_io(ffff80003c479330,ffff80003c479368,ffff80003c4791b0,ffff80003c479198) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1630 uvm_fault_lower(ffff80003c479330,ffff80003c479368,ffff80003c4792b0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1397 uvm_fault(fffffd805cee2028,200000001000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c4794e0,200000001040) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003c4794e0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 end trace frame: 0xffff80003c479560, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837dcff0) 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_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 intr_handler(ffff80003c478e20,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83946b68) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83946b68) at __mp_lock+0x199 sys/kern/kern_lock.c:165 uvn_io(fffffd805d1c0330,ffff80003c479040,1,202,0) at uvn_io+0x3d4 sys/uvm/uvm_vnode.c:1252 uvn_get(fffffd805d1c0330,0,ffff80003c479118,ffff80003c4790fc,0,1,68b801b87a59872a,1) at uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 uvm_fault_lower_io(ffff80003c479330,ffff80003c479368,ffff80003c4791b0,ffff80003c479198) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1630 uvm_fault_lower(ffff80003c479330,ffff80003c479368,ffff80003c4792b0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1397 uvm_fault(fffffd805cee2028,200000001000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c4794e0,200000001040) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003c4794e0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:489 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x6d pipe_write(fffffd8064e2f290,ffff80003c479830,0) at pipe_write+0x493 sys/kern/sys_pipe.c:560 dofilewritev(ffff80003bbf0fb0,6,ffff80003c479830,0,ffff80003c4798f0) at dofilewritev+0x242 sys/kern/sys_generic.c:380 sys_writev(ffff80003bbf0fb0,ffff80003c4799a0,ffff80003c4798f0) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80003c4799a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4799a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7043b5f1810, count: -21 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x636a1c8a0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x636a1c8a0, count: -1