*cpu0: uvm_fault(0xfffffd805ecead88, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77be53ad9e10, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002f40d0f0 rbx 0 rdx 0 rcx 0xffff80002a2eea80 rax 0x2a r8 0xffff80002f40d020 r9 0 r10 0xfefe41d31e00a4da r11 0x496433ed6a386553 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82ef54c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002f40d070 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=247340 pid=97105 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2b3a08,0xffffffff8388d120 process=0xffff80003c52b520 user=0xffff80002f408000, vmspace=0xfffffd805ecea400 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *97105 247340 93366 0 7 0 syz-executor 57249 93342 56850 0 2 0 syz-executor 57249 508627 56850 0 3 0x4000080 fsleep syz-executor 58157 362735 57279 0 2 0 syz-executor 58157 214237 57279 0 3 0x4000080 fsleep syz-executor 58157 270249 57279 0 3 0x4000080 fsleep syz-executor 58157 426445 57279 0 3 0x4000080 fsleep syz-executor 58157 298707 57279 0 3 0x4000080 fsleep syz-executor 52928 317873 6014 0 3 0x80 nanoslp syz-executor 52928 115591 6014 0 3 0x4000080 ttyin syz-executor 56850 486696 26914 0 3 0x82 nanoslp syz-executor 32585 491226 0 0 3 0x14200 acct acct 11201 355798 26914 0 2 0x2 syz-executor 25307 245220 26914 0 3 0x82 nanoslp syz-executor 35467 484659 0 0 3 0x14280 nfsidl nfsio 88329 498122 0 0 3 0x14280 nfsidl nfsio 84898 495987 0 0 3 0x14280 nfsidl nfsio 51294 100678 0 0 3 0x14280 nfsidl nfsio 48903 136123 0 0 3 0x14280 nfsidl nfsio 19799 226250 0 0 3 0x14280 nfsidl nfsio 50975 229898 0 0 3 0x14280 nfsidl nfsio 63080 505882 0 0 3 0x14280 nfsidl nfsio 92737 413582 0 0 3 0x14280 nfsidl nfsio 32395 112590 0 0 3 0x14280 nfsidl nfsio 2764 508472 0 0 3 0x14280 nfsidl nfsio 94108 203562 0 0 3 0x14280 nfsidl nfsio 31019 483012 0 0 3 0x14280 nfsidl nfsio 54232 426659 0 0 3 0x14280 nfsidl nfsio 28398 444487 0 0 3 0x14280 nfsidl nfsio 44498 104238 0 0 3 0x14280 nfsidl nfsio 55444 39154 0 0 3 0x14280 nfsidl nfsio 33593 428530 0 0 3 0x14280 nfsidl nfsio 39867 201249 0 0 3 0x14280 nfsidl nfsio 95993 43187 0 0 3 0x14280 nfsidl nfsio 51019 338777 1 0 3 0x100083 ttyopn getty 10146 131780 0 0 3 0x14200 bored sosplice 6014 282702 26914 0 2 0x3 syz-executor 57279 256227 26914 0 2 0x3 syz-executor 93366 69455 26914 0 3 0x82 nanoslp syz-executor 31963 177596 26914 0 3 0x82 nanoslp syz-executor 95083 314209 26914 0 3 0x82 wait syz-executor 26914 237038 20708 0 2 0x3 syz-executor 20708 175258 44465 0 3 0x10008a sigsusp ksh 44465 270455 31338 0 3 0x98 kqread sshd-session 31338 96594 84000 0 3 0x92 kqread sshd-session 84000 14809 1 0 3 0x88 kqread sshd 23859 203940 19608 74 3 0x1100092 bpf pflogd 19608 255649 1 0 3 0x80 sbwait pflogd 88217 237093 46341 73 3 0x1100090 kqread syslogd 46341 452686 1 0 3 0x100082 sbwait syslogd 53732 144899 1 0 3 0x100080 kqread resolvd 52859 362134 45217 77 3 0x100092 kqread dhcpleased 32485 425185 45217 77 3 0x100092 kqread dhcpleased 45217 212914 1 0 3 0x80 kqread dhcpleased 29493 426954 0 0 3 0x14200 bored smr 99653 113449 0 0 3 0x14200 pgzero zerothread 741 152796 0 0 3 0x14200 aiodoned aiodoned 60640 323645 0 0 3 0x14200 syncer update 18284 518565 0 0 3 0x14200 cleaner cleaner 6623 290857 0 0 2 0x14200 reaper 15475 23616 0 0 3 0x14200 pgdaemon pagedaemon 90924 94365 0 0 3 0x14200 bored viomb 92665 162389 0 0 3 0x40014200 acpi0 acpi0 41885 183986 0 0 3 0x40014200 idle1 68465 403084 0 0 3 0x14200 bored softnet7 52070 509938 0 0 3 0x14200 bored softnet6 24014 374533 0 0 3 0x14200 bored softnet5 97911 484612 0 0 3 0x14200 bored softnet4 56390 112464 0 0 3 0x14200 bored softnet3 79027 444657 0 0 3 0x14200 bored softnet2 60366 41857 0 0 3 0x14200 bored softnet1 5010 204999 0 0 2 0x14200 softnet0 53031 329254 0 0 3 0x14200 smrbar systqmp 22274 263741 0 0 3 0x14200 bored systq 55046 40469 0 0 3 0x14200 tmoslp softclockmp 34986 386236 0 0 3 0x40014200 tmoslp softclock 48609 162253 0 0 3 0x40014200 idle0 1 135914 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807e3ec410) #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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_upper_lookup+0x337 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 97105 (syz-executor) thread 0xffff80002a2eea80 (247340) exclusive rwlock amaplk r = 0 (0xfffffd806fcc6408) #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_check+0x597 sys/uvm/uvm_fault.c:862 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd805ecea500) #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:1924 #3 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807e3ec410) #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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2767 #4 uvm_fault_upper_lookup+0x337 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:682 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #8 recall_trap+0x8 Process 11201 (syz-executor) thread 0xffff80003c462028 (355798) exclusive rrwlock inode r = 0 (0xfffffd806f718c48) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e38a490) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 #10 namei+0x7ca sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #13 Xsyscall+0x128 Process 6623 (reaper) thread 0xffff8000ffffc7d0 (290857) exclusive rwlock kmmaplk r = 0 (0xffffffff839a81a8) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:831 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 53031 (systqmp) thread 0xffff8000ffffe530 (329254) shared rwlock systqmp r = 0 (0xffffffff837d83e8) #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 10234 11065K 11909K 166960K 13582 0 pcb 18 16K 17K 166960K 332 0 rtable 153 7K 9K 166960K 467 0 pf 42 19K 82K 166960K 686 0 ifaddr 30 4K 8K 166960K 103 0 ifgroup 59 2K 2K 166960K 173 0 sysctl 4 1K 9K 166960K 87 0 counters 70 37K 37K 166960K 168 0 ioctlops 0 0K 6K 166960K 1854 0 iov 0 0K 16K 166960K 156 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1462 92K 93K 166960K 2809 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 55 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 106K 166960K 1380 0 sigio 0 0K 0K 166960K 20 0 proc 72 115K 164K 166960K 726 0 subproc 72 4K 4K 166960K 101 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 190 0 in_multi 47 3K 7K 166960K 161 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 674 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 243 159K 185K 166960K 14763 0 UVM aobj 45 2K 2K 166960K 49 0 pinsyscall 42 84K 104K 166960K 2589 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 81 0 NDP 15 0K 2K 166960K 72 0 temp 79 8652K 8906K 166960K 47800 0 kqueue 15 20K 30K 166960K 309 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 120 151 0 148 2 1 1 2 0 8 0 rtentry 176 162 0 110 5 1 4 5 0 8 0 unpcb 144 768 0 750 9 6 3 4 0 8 2 syncache 336 13 0 13 3 2 1 1 0 8 1 tcpqe 32 5 0 5 3 2 1 1 0 8 1 tcpcb 736 441 0 433 15 12 3 7 0 8 1 arp 128 24 0 15 1 0 1 1 0 8 0 inpcb 328 1418 0 1402 18 13 5 8 0 8 3 nd6 144 27 0 17 1 0 1 1 0 8 0 pkpcb 40 14 0 14 3 2 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 34 0 34 2 1 1 1 0 8 1 pppxif 1504 5 0 5 3 2 1 1 0 8 1 pfstscr 40 3 0 2 1 0 1 1 0 8 0 pffrag 232 42 0 33 1 0 1 1 0 482 0 pffrnode 88 42 0 33 1 0 1 1 0 8 0 pffrent 40 78 0 67 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 1 1 1 0 1 0 8 0 pfanchor 1288 67 0 65 1 0 1 1 0 8 0 pfstitem 24 87 0 30 1 0 1 1 0 8 0 pfstkey 128 92 0 37 2 0 2 2 0 8 0 pfstate 384 86 0 33 6 0 6 6 0 8 0 pfrule 1344 140 0 135 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 654 0 373 30 11 19 30 0 8 0 art_table 40 657 0 373 5 0 5 5 0 8 0 art_node 32 161 0 108 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 10 2 1 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 47 0 37 1 0 1 1 0 8 0 shmpl 112 46 0 4 2 0 2 2 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3820 0 2309 95 0 95 95 0 8 0 ffsino 296 3820 0 2309 117 0 117 117 0 8 0 nchpl 144 5678 0 3976 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 uvmvnodes 80 4899 0 0 100 0 100 100 0 8 0 vnodes 216 4899 0 0 273 0 273 273 0 8 0 namei 1024 19538 0 19538 5 3 2 4 0 8 2 percpumem 16 99 0 49 1 0 1 1 0 8 0 kstatmem 264 106 0 74 3 0 3 3 0 8 0 scsiplug 72 7 0 7 2 2 0 1 0 8 0 scxspl 216 31519 0 31519 12 11 1 8 1 8 1 plimitpl 152 249 0 231 1 0 1 1 0 8 0 sigapl 424 1700 0 1625 9 0 9 9 0 8 0 knotepl 120 591 0 0 18 0 18 18 0 8 0 kqueuepl 224 451 0 439 2 1 1 2 0 8 0 pipepl 344 340 0 313 12 3 9 9 0 8 6 fdescpl 528 1654 0 1623 3 0 3 3 0 8 0 filepl 160 10076 0 9851 23 7 16 16 0 8 5 lockfpl 104 1012 0 1010 3 2 1 2 0 8 0 lockfspl 48 493 0 491 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 65 0 48 1 0 1 1 0 8 0 ucredpl 104 1329 0 1316 1 0 1 1 0 8 0 zombiepl 144 2272 0 2269 2 1 1 1 0 8 0 processpl 1232 1700 0 1625 7 0 7 7 0 8 0 procpl 664 3882 0 3800 9 1 8 9 0 8 0 sosppl 168 9 0 7 2 1 1 1 0 8 0 sockpl 752 2377 0 2340 26 16 10 12 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 36 0 0 5 0 5 5 0 8 0 mtagpl 96 27 0 0 1 0 1 1 0 8 0 mbufpl 256 275 0 0 17 0 17 17 0 8 0 bufpl 280 14230 0 8086 440 0 440 440 0 8 0 anonpl 32 11829 0 0 96 0 96 96 0 246 0 amapchunkpl 152 50245 0 49740 48 15 33 33 0 158 8 amappl16 200 6327 0 6297 54 39 15 26 0 8 8 amappl15 192 11 0 10 1 0 1 1 0 8 0 amappl14 184 167 0 155 1 0 1 1 0 8 0 amappl13 176 7 0 7 3 3 0 1 0 8 0 amappl12 168 2348 0 2317 4 2 2 3 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 261 0 261 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 124 0 112 1 0 1 1 0 8 0 amappl6 120 233 0 230 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 419 0 397 1 0 1 1 0 8 0 amappl3 96 9714 0 9599 7 3 4 4 0 8 0 amappl2 88 794 0 731 2 0 2 2 0 8 0 amappl1 80 16154 0 15552 20 4 16 19 0 8 1 amappl 88 13788 0 13617 6 1 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 128 258 0 258 3 2 1 1 0 8 1 dma64 64 8 0 8 3 3 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 48 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1654 0 1623 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1654 0 1623 1 0 1 1 0 8 0 vmmpekpl 168 16494 0 16444 3 0 3 3 0 8 0 vmmpepl 168 113734 0 111726 130 18 112 114 0 357 8 vmsppl 488 1653 0 1623 7 2 5 5 0 8 0 rwobjpl 80 37984 0 32095 126 0 126 126 0 8 0 pdppl 4096 3315 0 3246 125 52 73 85 0 8 4 pvpl 32 21444 0 0 174 1 173 173 0 265 0 pmappl 256 1653 0 1623 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 326 0 82 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8385dff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833149a9) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d9d1b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800036c28cf0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800036c28cf0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001466000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 end trace frame: 0xffff800036c28e20, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8385dff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,20) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833149a9) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833d9d1b) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800036c28cf0,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800036c28cf0) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001466000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a2eefb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a2eefb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff800036c28ea0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807aa22d08,81,fffffd80097fb068,ffff80002a2eefb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80677d3c48,ffff80002a2eefb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80677d3c48,ffff80002a2eefb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80677d3c48,ffff80002a2eefb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80677d3c48,ffff80002a2eefb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a2eefb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a2eefb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a2eefb0,ffff800036c29210,ffff800036c29160) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800036c29210) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036c29210) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x769855a89720, count: -25 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: 0x77be53ad9e10, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77be53ad9e10, count: -1