uvm_fault(0xfffffd8062c919b0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82a81198 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c476e80 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82a81198 Starting stack trace... panic(ffffffff833df752) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c476dd0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001651000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(31e5f,81,2000,ffff800030bcafe0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,81,2000,ffff800030bcafe0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c476f80) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8071603cb0,81,fffffd80097fd548,ffff800030bcafe0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d7aec08,ffff800030bcafe0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d7aec08,ffff800030bcafe0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d7aec08,ffff800030bcafe0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d7aec08,ffff800030bcafe0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800030bcafe0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800030bcafe0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800030bcafe0,ffff80003c4772f0,ffff80003c477240) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4772f0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4772f0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7520bbf0f8c0, count: 242 End of stack trace. W ARNING: SPL NOT LOWERED ON SYSCALL 83 2130049424 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *466912 54457 0 0 0x4000000 1 syz-executor 443456 11061 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0x35909899d30, 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(0xfffffd8062c919b0, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x35909899d30, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000337d18d0 rbx 0 rdx 0xffff800001596800 rcx 0xffff800030bcb7a8 rax 0x3b r8 0xffff8000337d1800 r9 0x1 r10 0x858f0c89f04f0073 r11 0xb58be9cf1a536c45 r12 0 r13 0 r14 0xffff800030bcb7a8 r15 0 rip 0xffffffff822603ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000337d1850 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=466912 pid=54457 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800030bca818,0xffffffff83a13e30 process=0xffff80003c4d79f0 user=0xffff8000337cc000, vmspace=0xfffffd800b0635b8 estcpu=34, cpticks=1, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 58722 77306 31991 0 2 0 syz-executor 54457 26328 88474 0 2 0 syz-executor *54457 466912 88474 0 7 0x4000000 syz-executor 48643 432596 44611 0 2 0 syz-executor 48643 445981 44611 0 3 0x4000080 bell syz-executor 27466 266053 71921 0 2 0xc80 syz-executor 27466 209550 71921 0 3 0x4000080 kqread syz-executor 27466 73715 71921 0 3 0x4000080 fsleep syz-executor 34975 420909 4295 0 4 0x82000 syz-executor 34975 438699 4295 0 2 0x4082000 syz-executor 34975 466786 4295 0 3 0x4082000 inode syz-executor 34975 439349 4295 0 3 0x4082000 inode syz-executor 34975 162216 4295 0 3 0x4082000 inode syz-executor 34975 9471 4295 0 2 0x4082c00 syz-executor 34975 340182 4295 0 4 0x4082000 syz-executor 34975 333662 4295 0 3 0x4002000 suspend syz-executor 25058 410402 78782 0 2 0xc82 syz-executor 31991 456484 78782 0 2 0xc82 syz-executor 4295 297316 78782 0 2 0xc82 syz-executor 44611 332853 78782 0 2 0xc82 syz-executor 88474 81741 78782 0 2 0xc82 syz-executor 85930 38721 1 0 2 0x100083 getty 71921 303702 78782 0 2 0xc82 syz-executor 1344 397212 78782 0 2 0x2 syz-executor 29032 358764 78782 0 2 0xc82 syz-executor 78782 198089 6414 0 3 0x82 kqread syz-executor 6414 211144 16250 0 3 0x10008a sigsusp ksh 16250 243517 62059 0 3 0x98 kqread sshd-session 62059 458732 95016 0 3 0x92 kqread sshd-session 95016 291943 1 0 3 0x88 kqread sshd 13930 96723 45322 74 3 0x1100092 bpf pflogd 45322 164437 1 0 3 0x80 sbwait pflogd 47323 474102 15655 73 3 0x1100090 kqread syslogd 15655 352658 1 0 3 0x100082 sbwait syslogd 6454 350367 1 0 3 0x100080 kqread resolvd 80966 310501 39979 77 3 0x100092 kqread dhcpleased 45817 373172 39979 77 3 0x100092 kqread dhcpleased 39979 125434 1 0 3 0x80 kqread dhcpleased 75929 193956 0 0 2 0x14200 smr 73688 181368 0 0 2 0x14200 zerothread 18341 33864 0 0 3 0x14200 aiodoned aiodoned 12400 359377 0 0 2 0x14e00 update 83594 241279 0 0 3 0x14200 cleaner cleaner 73410 374859 0 0 3 0x14200 reaper reaper 38065 273409 0 0 3 0x14200 pgdaemon pagedaemon 2430 133184 0 0 3 0x14200 bored viomb 82349 310573 0 0 3 0x40014200 acpi0 acpi0 28838 261673 0 0 3 0x40014200 idle1 6043 318141 0 0 3 0x14200 bored softnet1 36950 487852 0 0 2 0x14200 softnet0 73 318458 0 0 3 0x14200 smrbar systqmp 91906 12718 0 0 3 0x14200 syncxs systq 6508 454560 0 0 2 0x14200 softclockmp 11061 443456 0 0 7 0x40014200 softclock 81452 399782 0 0 3 0x40014200 idle0 1 471300 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 58722 (syz-executor) thread 0xffff800030bca818 (77306) exclusive rwlock vmmaplk r = 0 (0xfffffd8062c91c98) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 34975 (syz-executor) thread 0xffff800030bca2e8 (438699) exclusive rrwlock inode r = 0 (0xfffffd806e85f468) #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+0xbd 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:775 #9 Xsyscall+0x128 Process 34975 (syz-executor) thread 0xffff80003c41fa18 (439349) exclusive rrwlock inode r = 0 (0xfffffd8060b81588) #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+0xbd 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 domknodat+0xb4 sys/kern/vfs_syscalls.c:1592 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 1344 (syz-executor) thread 0xffff8000fffeefa8 (397212) exclusive rrwlock inode r = 0 (0xfffffd8068d818f8) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_getdents+0x254 sys/kern/vfs_syscalls.c:3168 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #7 Xsyscall+0x128 Process 73 (systqmp) thread 0xffff8000ffffe000 (318458) shared rwlock systqmp r = 0 (0xffffffff83828298) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 Process 91906 (systq) thread 0xffff8000ffffe530 (12718) shared rwlock systq r = 0 (0xffffffff838281f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11123 12275K 13436K 166960K 18653 0 pcb 19 18K 26K 166960K 1085 0 rtable 267 13K 14K 166960K 1206 0 pf 34 17K 20K 166960K 454 0 ifaddr 41 8K 9K 166960K 320 0 ifgroup 55 2K 2K 166960K 610 0 sysctl 4 1K 9K 166960K 38 0 counters 70 37K 38K 166960K 758 0 ioctlops 0 0K 4K 166960K 2186 0 iov 1 8K 24K 166960K 236 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1458 92K 92K 166960K 5064 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 5K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 89 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 4295 0 sigio 0 0K 0K 166960K 75 0 proc 72 115K 180K 166960K 1158 0 subproc 72 4K 4K 166960K 149 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 658 0 in_multi 96 6K 7K 166960K 384 0 ether_multi 1 0K 0K 166960K 46 0 mrt 1 0K 0K 166960K 32 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 987 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 262 168K 186K 166960K 41243 0 UVM aobj 45 17K 19K 166960K 66 0 pinsyscall 42 84K 102K 166960K 5635 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 282 0 NDP 12 0K 1K 166960K 227 0 temp 121 8681K 8936K 166960K 197289 0 kqueue 14 22K 32K 166960K 778 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 vscsiccb 40 1 0 0 1 0 1 1 0 8 0 plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 506 0 503 4 3 1 3 0 8 0 rtentry 176 381 0 275 6 1 5 5 0 8 0 unpcb 144 2346 0 2328 19 17 2 6 0 8 1 syncache 336 17 0 17 10 10 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 1061 0 1055 21 19 2 7 0 8 1 arp 136 44 0 32 1 0 1 1 0 8 0 inpcb 328 4362 0 4350 47 45 2 15 0 8 0 nd6 152 60 0 26 2 0 2 2 0 8 0 pkpcb 40 19 0 19 6 6 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 271 0 271 3 2 1 1 0 8 1 pppxif 1504 53 0 53 4 3 1 1 0 8 1 pffrag 232 27 0 19 1 0 1 1 0 482 0 pffrnode 88 26 0 18 1 0 1 1 0 8 0 pffrent 40 113 0 105 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 pfstitem 24 194 0 136 1 0 1 1 0 8 0 pfstkey 128 194 0 136 2 0 2 2 0 8 0 pfstate 448 194 0 136 7 0 7 7 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 5 0 5 5 5 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1519 0 1036 46 15 31 31 0 8 0 art_table 40 1523 0 1036 6 1 5 6 0 8 0 art_node 32 367 0 270 1 0 1 1 0 8 0 sysvmsgpl 40 29 0 4 1 0 1 1 0 8 0 semapl 112 87 0 77 1 0 1 1 0 8 0 shmpl 112 39 0 4 2 0 2 2 0 8 0 dirhash 1024 51 0 34 3 0 3 3 0 8 0 dino2pl 256 9400 0 7874 96 0 96 96 0 8 0 ffsino 296 9400 0 7874 118 0 118 118 0 8 0 nchpl 144 15174 0 13450 65 0 65 65 0 8 0 rtmask 32 61 0 61 7 7 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 49246 0 49243 6 4 2 2 0 8 1 percpumem 16 394 0 344 1 0 1 1 0 8 0 vcpupl 3968 7 0 0 1 0 1 1 0 8 0 vmpool 848 24 0 17 1 0 1 1 0 8 0 kstatmem 264 376 0 350 6 3 3 3 0 8 0 scsiplug 72 13 0 13 8 7 1 1 0 8 1 scxspl 216 79812 0 79811 21 18 3 8 1 8 2 plimitpl 152 529 0 511 1 0 1 1 0 8 0 sigapl 424 4593 0 4546 8 2 6 8 0 8 0 knotepl 120 1093 0 0 32 0 32 32 0 8 0 kqueuepl 224 1887 0 1876 19 18 1 5 0 8 0 pipepl 344 553 0 525 10 7 3 9 0 8 0 fdescpl 528 4546 0 4515 3 0 3 3 0 8 0 filepl 160 27457 0 27226 51 38 13 20 0 8 2 lockfpl 104 1490 0 1488 2 1 1 2 0 8 0 lockfspl 48 561 0 559 1 0 1 1 0 8 0 sessionpl 144 39 0 30 1 0 1 1 0 8 0 pgrppl 48 98 0 81 1 0 1 1 0 8 0 ucredpl 104 3886 0 3873 1 0 1 1 0 8 0 zombiepl 144 7089 0 7087 1 0 1 1 0 8 0 processpl 1232 4593 0 4546 7 2 5 6 0 8 0 procpl 664 11522 0 11464 12 5 7 8 0 8 0 sosppl 176 30 0 30 9 8 1 1 0 8 1 sockpl 752 7340 0 7306 89 83 6 23 0 8 2 mcl64k 65536 33 0 0 4 1 3 3 0 8 0 mcl16k 16384 31 0 0 4 1 3 3 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 134 0 0 16 0 16 16 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 67 0 0 6 0 6 6 0 8 0 mtagpl 96 112 0 0 3 0 3 3 0 8 0 mbufpl 256 1207 0 0 75 0 75 75 0 8 0 bufpl 280 30288 0 24152 439 0 439 439 0 8 0 anonpl 32 15715 0 0 126 0 126 126 0 246 0 amapchunkpl 152 148580 0 147976 88 50 38 39 0 158 12 amappl16 200 16569 0 16416 116 99 17 28 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 10 0 10 2 2 0 1 0 8 0 amappl13 176 556 0 554 1 0 1 1 0 8 0 amappl12 168 4980 0 4938 3 1 2 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 51 0 37 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 62 0 59 1 0 1 1 0 8 0 amappl7 128 125 0 124 1 0 1 1 0 8 0 amappl6 120 387 0 373 1 0 1 1 0 8 0 amappl5 112 86 0 75 1 0 1 1 0 8 0 amappl4 104 498 0 467 1 0 1 1 0 8 0 amappl3 96 29737 0 29622 6 2 4 4 0 8 0 amappl2 88 657 0 594 2 0 2 2 0 8 0 amappl1 80 28317 0 27725 15 1 14 14 0 8 0 amappl 88 39608 0 39427 5 0 5 5 0 92 0 uvmvnodes 80 206 0 0 5 0 5 5 0 8 0 dma65536 65536 3 0 3 2 2 0 1 0 8 0 dma4096 4096 3 0 3 3 2 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 261 0 261 7 6 1 1 0 8 1 dma64 64 9 0 9 3 3 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 65 0 21 1 0 1 1 0 8 0 uaddrrnd 24 4546 0 4515 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4546 0 4515 1 0 1 1 0 8 0 vmmpekpl 168 31109 0 31043 4 0 4 4 0 8 0 vmmpepl 168 289034 0 286943 161 58 103 109 0 357 4 vmsppl 488 4545 0 4515 6 1 5 5 0 8 0 rwobjpl 80 75537 0 74202 38 4 34 35 0 8 0 pdppl 4096 9147 0 9071 152 74 78 81 0 8 2 pvpl 32 23757 0 0 193 3 190 190 0 265 0 pmappl 256 4569 0 4532 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 469 0 135 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83849ff0) 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+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 intr_handler(ffff80002a1f87e0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838d0fc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838d0fc0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff838d0fc0,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 softclock_thread_run(ffffffff837b4638) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000ffffecf8) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83849ff0) 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+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 intr_handler(ffff80002a1f87e0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff838d0fc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838d0fc0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff838d0fc0,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 softclock_thread_run(ffffffff837b4638) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000ffffecf8) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x35909899d30, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x35909899d30, count: -1