uvm_fault(0xfffffa006cd22200, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82f68218 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c4153f0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82f68218 Starting stack trace... panic(ffffffff834ea76e) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c415340) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3fafb8,fffffa00605cc7b8,ffff80003c415520) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff80003c3fafb8,ffff80003c415670,ffff80003c4155c0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80003c415670) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c415670) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x647efbf5ce0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -9994624 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *223317 87638 0 0 0 1 syz-executor 54639 4979 60928 0x10 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x719291686360, 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(0xfffffa006cd22200, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x719291686360, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a29acb0 rbx 0 rdx 0 rcx 0xffff80003c3faa88 rax 0x39 r8 0xffff80002a29abe0 r9 0x1 r10 0x10bc6a30550c2945 r11 0x6c360e0498685df8 r12 0 r13 0 r14 0xffff80003c3faa88 r15 0 rip 0xffffffff818503ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a29ac30 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=223317 pid=87638 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3fa028,0xffff80003c3fafc8 process=0xffff80003c479d08 user=0xffff80002a295000, vmspace=0xfffffa006cd22200 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 32729 94875 42766 0 3 0x2 biowait syz-executor 22301 179590 85462 0 2 0 syz-executor 22301 310711 85462 0 3 0x4000080 fsleep syz-executor 22301 343285 85462 0 3 0x4000080 fsleep syz-executor *87638 223317 31667 0 7 0 syz-executor 87638 118901 31667 0 3 0x4000000 sbar syz-executor 77828 343214 25373 0 2 0 syz-executor 77828 39227 25373 0 3 0x4000080 fsleep syz-executor 28937 202676 97463 0 2 0 syz-executor 28937 51669 97463 0 3 0x4000080 netcon syz-executor 28937 77999 97463 0 3 0x4000080 fsleep syz-executor 27856 401422 27621 0 3 0x80 nanoslp syz-executor 27856 46471 27621 0 3 0x4000000 smrbar syz-executor 27856 518749 27621 0 3 0x4000000 smrbar syz-executor 27856 377898 27621 0 3 0x4000080 fsleep syz-executor 4979 54639 74496 60928 7 0x10 syz-executor 4979 383559 74496 60928 3 0x4000090 kqread syz-executor 4979 89725 74496 60928 3 0x4000090 fsleep syz-executor 27621 9883 42766 0 3 0x82 nanoslp syz-executor 31667 277403 42766 0 3 0x82 nanoslp syz-executor 4462 411039 0 0 3 0x14280 nfsidl nfsio 44013 206242 0 0 3 0x14280 nfsidl nfsio 62 50642 0 0 3 0x14280 nfsidl nfsio 42631 154874 0 0 3 0x14280 nfsidl nfsio 23446 53846 0 0 3 0x14280 nfsidl nfsio 80730 431022 0 0 3 0x14280 nfsidl nfsio 14146 492049 0 0 3 0x14280 nfsidl nfsio 97235 476559 0 0 3 0x14280 nfsidl nfsio 93545 8985 0 0 3 0x14280 nfsidl nfsio 41356 500760 0 0 3 0x14280 nfsidl nfsio 16903 26920 0 0 3 0x14280 nfsidl nfsio 24785 57821 0 0 3 0x14280 nfsidl nfsio 73307 47651 0 0 3 0x14280 nfsidl nfsio 19784 37286 0 0 3 0x14280 nfsidl nfsio 60311 360331 0 0 3 0x14280 nfsidl nfsio 8796 44229 0 0 3 0x14280 nfsidl nfsio 72658 185318 0 0 3 0x14280 nfsidl nfsio 9952 218365 0 0 3 0x14280 nfsidl nfsio 31536 220064 0 0 3 0x14280 nfsidl nfsio 91991 273447 0 0 3 0x14280 nfsidl nfsio 85462 491888 42766 0 3 0x82 nanoslp syz-executor 74496 76667 42766 0 3 0x82 nanoslp syz-executor 25373 204719 42766 0 3 0x82 nanoslp syz-executor 97463 33852 42766 0 3 0x82 nanoslp syz-executor 59679 367667 42766 0 3 0x82 nanoslp syz-executor 42766 257705 31891 0 3 0x82 kqread syz-executor 31891 74181 22315 0 3 0x10008a sigsusp ksh 22315 286762 44743 0 3 0x98 kqread sshd-session 44743 158321 99760 0 3 0x92 kqread sshd-session 77247 278290 1 0 3 0x100083 ttyin getty 99760 264759 1 0 3 0x88 kqread sshd 20571 26481 91370 74 3 0x1100092 bpf pflogd 91370 310781 1 0 3 0x80 sbwait pflogd 74320 305284 16297 73 3 0x1100090 kqread syslogd 16297 504170 1 0 3 0x100082 sbwait syslogd 23296 92005 1 0 3 0x100080 kqread resolvd 21720 114137 33051 77 3 0x100092 kqread dhcpleased 83097 250201 33051 77 3 0x100092 kqread dhcpleased 33051 450669 1 0 3 0x80 kqread dhcpleased 53206 121564 0 0 3 0x14200 bored smr 35835 497583 0 0 2 0x14200 zerothread 39174 451697 0 0 3 0x14200 aiodoned aiodoned 34215 473485 0 0 3 0x14200 syncer update 90773 66487 0 0 3 0x14200 cleaner cleaner 15360 10776 0 0 3 0x14200 reaper reaper 34619 204997 0 0 3 0x14200 pgdaemon pagedaemon 97626 355555 0 0 3 0x14200 bored viomb 56375 317447 0 0 3 0x40014200 acpi0 acpi0 42630 521700 0 0 3 0x40014200 idle1 44406 462421 0 0 3 0x14200 bored softnet1 76008 189299 0 0 3 0x14200 netlock softnet0 85301 264374 0 0 2 0x40014200 systqmp 51416 301149 0 0 3 0x14200 bored systq 92182 510568 0 0 3 0x14200 tmoslp softclockmp 90966 320585 0 0 3 0x40014200 tmoslp softclock 55441 31494 0 0 3 0x40014200 idle0 1 523636 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 32729 (syz-executor) thread 0xffff80003a7b8a80 (94875) exclusive rrwlock inode r = 0 (0xfffffa006e255420) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffa006fccab40) #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:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 87638 (syz-executor) thread 0xffff80003c3fafb8 (118901) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83afa440) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 27856 (syz-executor) thread 0xffff80003bfc4d30 (518749) exclusive rwlock clonelk r = 0 (0xffffffff839a3698) #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 if_clone_destroy+0x93 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2160 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 4979 (syz-executor) thread 0xffff80003a7b8020 (54639) exclusive rwlock uobjlk r = 0 (0xfffffa006c845750) #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 uvm_fault+0x1e5 sys/uvm/uvm_fault.c:649 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #4 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffa006c7706d8) #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+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11069 12166K 12476K 166960K 12835 0 pcb 18 12K 12K 166960K 200 0 rtable 132 6K 8K 166960K 615 0 pf 28 16K 23K 166960K 143 0 ifaddr 27 4K 8K 166960K 110 0 ifgroup 41 1K 2K 166960K 162 0 sysctl 4 1K 9K 166960K 44 0 counters 64 36K 38K 166960K 166 0 ioctlops 0 0K 4K 166960K 1644 0 iov 0 0K 17K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 1959 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 86 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 58K 89K 166960K 780 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 164K 166960K 737 0 subproc 63 3K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 30 0 in_multi 47 3K 7K 166960K 162 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 91 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 517 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 234 152K 188K 166960K 9034 0 UVM aobj 98 7K 7K 166960K 98 0 pinsyscall 42 84K 102K 166960K 2322 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 38 0 NDP 9 0K 2K 166960K 78 0 temp 73 9129K 9194K 166960K 30650 0 kqueue 17 26K 32K 166960K 171 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 96 0 92 1 0 1 1 0 8 0 rtentry 176 209 0 160 6 2 4 6 0 8 0 unpcb 144 671 0 652 9 4 5 9 0 8 4 syncache 336 31 0 31 1 0 1 1 0 8 1 tcpcb 736 314 0 308 7 6 1 7 0 8 0 arp 136 27 0 18 1 0 1 1 0 8 0 inpcb 328 939 0 925 11 4 7 7 0 8 5 nd6 152 36 0 27 1 0 1 1 0 8 0 pkpcb 40 3 0 2 1 0 1 1 0 8 0 kcovpl 48 12 0 5 1 0 1 1 0 8 0 ppxss 1192 38 0 37 1 0 1 1 0 8 0 pppxif 1576 3 0 3 1 1 0 1 0 8 0 pffrag 232 18 0 4 1 0 1 1 0 482 0 pffrnode 88 17 0 4 1 0 1 1 0 8 0 pffrent 40 24 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 1 0 0 1 0 1 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 55 0 12 1 0 1 1 0 8 0 pfstkey 128 55 0 12 2 0 2 2 0 8 0 pfstate 448 55 0 12 5 0 5 5 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 rttmr 136 34 0 34 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 927 0 699 29 6 23 29 0 8 4 art_table 40 928 0 699 5 0 5 5 0 8 1 art_node 32 209 0 167 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 83 0 73 1 0 1 1 0 8 0 shmpl 112 95 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2619 0 1149 93 0 93 93 0 8 0 ffsino 296 2619 0 1149 114 0 114 114 0 8 0 nchpl 144 3621 0 1903 64 0 64 64 0 8 0 vnodes 216 3128 0 0 174 0 174 174 0 8 0 namei 1024 11991 0 11990 2 1 1 2 0 8 0 percpumem 16 98 0 51 1 0 1 1 0 8 0 kstatmem 264 113 0 90 3 0 3 3 0 8 0 scxspl 216 11467 0 11466 10 8 2 8 1 8 1 plimitpl 152 147 0 130 1 0 1 1 0 8 0 sigapl 424 1168 0 1101 9 0 9 9 0 8 0 knotepl 120 543 0 0 17 0 17 17 0 8 0 kqueuepl 224 214 0 201 1 0 1 1 0 8 0 pipepl 344 192 0 164 3 0 3 3 0 8 0 fdescpl 528 1132 0 1101 3 0 3 3 0 8 0 filepl 160 5932 0 5701 18 4 14 18 0 8 3 lockfpl 104 293 0 291 1 0 1 1 0 8 0 lockfspl 48 140 0 138 1 0 1 1 0 8 0 sessionpl 144 65 0 56 1 0 1 1 0 8 0 pgrppl 48 81 0 64 1 0 1 1 0 8 0 ucredpl 104 671 0 657 1 0 1 1 0 8 0 zombiepl 144 1102 0 1101 1 0 1 1 0 8 0 processpl 1232 1168 0 1101 6 0 6 6 0 8 0 procpl 664 1997 0 1919 8 0 8 8 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 1733 0 1694 26 15 11 24 0 8 7 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 49 0 0 6 0 6 6 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 222 0 0 14 0 14 14 0 8 0 bufpl 272 3378 0 107 219 0 219 219 0 8 0 anonpl 32 7969 0 0 65 0 65 65 0 247 0 amapchunkpl 152 29354 0 28777 40 7 33 40 0 158 7 amappl16 200 1933 0 1903 4 2 2 4 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 485 0 484 1 0 1 1 0 8 0 amappl13 176 209 0 197 1 0 1 1 0 8 0 amappl12 168 1429 0 1400 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 293 0 293 1 1 0 1 0 8 0 amappl8 136 117 0 115 1 0 1 1 0 8 0 amappl7 128 204 0 190 1 0 1 1 0 8 0 amappl6 120 194 0 193 1 0 1 1 0 8 0 amappl5 112 175 0 164 1 0 1 1 0 8 0 amappl4 104 433 0 414 1 0 1 1 0 8 0 amappl3 96 5678 0 5563 4 0 4 4 0 8 0 amappl2 88 966 0 906 2 0 2 2 0 8 0 amappl1 80 25847 0 25243 21 3 18 20 0 8 1 amappl 88 7845 0 7681 5 0 5 5 0 92 0 uvmvnodes 80 120 0 0 3 0 3 3 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 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 97 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1132 0 1101 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1132 0 1101 1 0 1 1 0 8 0 vmmpekpl 168 15169 0 15116 3 0 3 3 0 8 0 vmmpepl 168 97479 0 95562 111 6 105 108 0 357 5 vmsppl 488 1131 0 1101 5 0 5 5 0 8 0 rwobjpl 80 33349 0 32205 31 1 30 30 0 8 1 pdppl 4096 2271 0 2202 133 56 77 83 0 8 8 pvpl 32 15770 0 0 130 2 128 128 0 265 0 pmappl 256 1131 0 1101 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 541 0 72 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8392aff0) 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+0x4f sys/dev/kcov.c:159 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83af9c40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83af9c40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003179d460,ffff8000002a2900) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83af9c40) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83af9c40) at __mp_lock+0x199 sys/kern/kern_lock.c:173 uvm_fault(fffffa006c7705d8,6d35fa8e000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff80003179d800,6d35fa8e000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003179d800) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 end trace frame: 0xffff80003179d880, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8392aff0) 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+0x4f sys/dev/kcov.c:159 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff83af9c40) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83af9c40) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80003179d460,ffff8000002a2900) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83af9c40) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83af9c40) at __mp_lock+0x199 sys/kern/kern_lock.c:173 uvm_fault(fffffa006c7705d8,6d35fa8e000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:650 upageflttrap(ffff80003179d800,6d35fa8e000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003179d800) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x79f09f434c60, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x719291686360, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x719291686360, count: -1