*cpu0: uvm_fault(0xfffff8806cd817c0, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6fdba9a83480, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2c8f40 rbx 0 rdx 0 rcx 0xffff80002a222010 rax 0x2a r8 0xffff80002a2c8e70 r9 0x97e794d2001 r10 0x3e442195e47df6e7 r11 0xd58782d0bb1bf63c r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8105a4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a2c8ec0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=185698 pid=82579 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a222a70,0xffff80002a2222b8 process=0xffff800045ff3030 user=0xffff80002a2c3000, vmspace=0xfffff8800b1f75b8 estcpu=36, cpticks=6, pctcpu=0.5, user=0, sys=6, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 43891 15297 28870 0 2 0 0 syz-executor 43891 452275 28870 0 7 0 0x4000000 syz-executor 55421 277038 61159 0 2 0 0 syz-executor 47012 129543 96247 0 2 0 0xc80 syz-executor 47012 48134 96247 0 2 0 0x4000000 syz-executor 47012 138895 96247 0 3 0 0x4000000 inode syz-executor 47012 90091 96247 0 3 0 0x4000080 fsleep syz-executor 35280 291221 78233 0 3 0 0x80 nanoslp syz-executor 35280 103216 78233 0 3 0 0x4000080 sbwait syz-executor 35280 116464 78233 0 3 0 0x4000080 fsleep syz-executor 61658 463040 4717 0 3 0 0x80 nanoslp syz-executor 61658 37250 4717 0 3 0 0x4000080 pipewr syz-executor 77893 265269 2968 0 2 0 0xc80 syz-executor 77893 521641 2968 0 3 0 0x4000080 pipewr syz-executor 77893 348396 2968 0 3 0 0x4000080 pipewr syz-executor 12532 267305 70479 60929 2 0x10 0xc80 syz-executor 12532 366099 70479 60929 2 0x10 0x4000080 syz-executor 12532 47676 70479 60929 3 0x10 0x4000080 fsleep syz-executor 2968 416032 72511 0 3 0x2 0x80 nanoslp syz-executor 78233 51421 72511 0 2 0x2 0xc80 syz-executor 61159 311526 72511 0 3 0x2 0x80 nanoslp syz-executor 70479 52692 72511 0 2 0x2 0xc80 syz-executor 4717 45708 72511 0 2 0x2 0xc80 syz-executor 96247 234968 72511 0 3 0x2 0x80 nanoslp syz-executor *82579 185698 72511 0 7 0x2 0 syz-executor 28870 452802 72511 0 3 0x2 0x80 nanoslp syz-executor 72511 464992 42052 0 2 0x2 0 syz-executor 42052 59504 56171 0 3 0x100002 0x88 sigsusp ksh 56171 244959 74523 0 3 0x10 0x88 kqread sshd-session 74523 139434 33242 0 3 0x12 0x80 kqread sshd-session 60727 59883 1 0 3 0x100003 0x80 ttyin getty 33242 213157 1 0 3 0 0x88 kqread sshd 81868 324606 68647 74 3 0x1100012 0x80 bpf pflogd 68647 472425 1 0 3 0 0x80 sbwait pflogd 19990 209099 70932 73 3 0x1100010 0x80 kqread syslogd 70932 515058 1 0 3 0x100002 0x80 sbwait syslogd 71493 378389 1 0 3 0x100000 0x80 kqread resolvd 2805 371564 39106 77 2 0x100012 0 dhcpleased 92777 194067 39106 77 3 0x100012 0x80 kqread dhcpleased 39106 26116 1 0 3 0 0x80 kqread dhcpleased 22588 88584 0 0 3 0x14000 0x200 pause smr 960 483829 0 0 3 0x14000 0x200 pgzero zerothread 20041 233651 0 0 3 0x14000 0x200 aiodoned aiodoned 78502 92951 0 0 3 0x14000 0x200 syncer update 56908 243002 0 0 3 0x14000 0x200 cleaner cleaner 47524 342541 0 0 3 0x14000 0x200 reaper reaper 54145 515302 0 0 3 0x14000 0x200 pgdaemon pagedaemon 42292 407786 0 0 3 0x14000 0x200 bored viomb 30454 438332 0 0 3 0x14000 0x40000200 acpi0 acpi0 70190 346982 0 0 3 0x14000 0x40000200 idle1 37454 337479 0 0 3 0x14000 0x200 bored softnet1 31769 330808 0 0 3 0x14000 0x200 bored softnet0 41974 360790 0 0 3 0x14000 0x200 smrbar systqmp 74136 113721 0 0 3 0x14000 0x200 bored systq 86752 349657 0 0 3 0x14000 0x200 tmoslp softclockmp 75242 24567 0 0 3 0x14000 0x40000200 tmoslp softclock 57200 383006 0 0 3 0x14000 0x40000200 idle0 1 305596 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 43891 (syz-executor) thread 0xffff80002a2fcd20 (452275) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a81b00) #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 47012 (syz-executor) thread 0xffff80002a2fc2c0 (48134) exclusive rrwlock inode r = 0 (0xfffff8806ce4fa08) #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 vn_write+0x18f sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #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:783 #9 Xsyscall+0x128 Process 47012 (syz-executor) thread 0xffff80002a2fc028 (138895) exclusive rrwlock inode r = 0 (0xfffff8806ce4f1f0) #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 sys_truncate+0x84 sys/kern/vfs_syscalls.c:2831 #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 35280 (syz-executor) thread 0xffff80002a2fda18 (103216) exclusive rwlock sbufrcv r = 0 (0xffff8000015ab590) #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 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 soreceive+0x27d sys/kern/uipc_socket.c:890 #4 recvit+0x40b sys/kern/uipc_syscalls.c:1078 #5 sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:878 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 82579 (syz-executor) thread 0xffff80002a222010 (185698) exclusive rwlock amaplk r = 0 (0xfffff8806df749b0) #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+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffff8800b1f76b8) #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 Process 41974 (systqmp) thread 0xffff800045ffe530 (360790) shared rwlock systqmp r = 0 (0xffffffff839993b8) #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 11052 12083K 12214K 166960K 12203 0 pcb 17 12K 12K 166960K 25 0 rtable 220 6K 7K 166960K 356 0 pf 33 17K 24K 166960K 54 0 ifaddr 39 6K 7K 166960K 46 0 ifgroup 51 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1491 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1299 82K 82K 166960K 1385 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 61K 97K 166960K 156 0 proc 71 115K 164K 166960K 553 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 4 0 in_multi 89 6K 6K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 387 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 243 168K 176K 166960K 3296 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 42 84K 102K 166960K 1312 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 25 1K 2K 166960K 29 0 temp 36 9114K 9120K 166960K 8307 0 kqueue 13 20K 22K 166960K 29 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 35 0 32 1 0 1 1 0 8 0 rtentry 176 112 0 12 6 0 6 6 0 8 0 unpcb 144 58 0 39 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 15 0 9 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 86 0 74 2 0 2 2 0 8 0 nd6 152 25 0 3 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 2 0 2 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 22 0 0 1 0 1 1 0 8 0 pfstkey 128 24 0 2 1 0 1 1 0 8 0 pfstate 448 23 0 1 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 465 0 0 30 0 30 30 0 8 0 art_table 40 466 0 0 5 0 5 5 0 8 0 art_node 32 112 0 21 1 0 1 1 0 8 0 semapl 72 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1606 0 135 93 0 93 93 0 8 0 ffsino 296 1606 0 135 114 0 114 114 0 8 0 nchpl 144 1829 0 123 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1712 0 0 96 0 96 96 0 8 0 namei 1024 5658 0 5657 2 0 2 2 0 8 1 percpumem 16 53 0 3 1 0 1 1 0 8 0 kstatmem 264 29 0 4 2 0 2 2 0 8 0 scxspl 216 6400 0 6400 4 3 1 3 1 8 1 plimitpl 152 35 0 17 1 0 1 1 0 8 0 sigapl 424 473 0 426 7 0 7 7 0 8 1 knotepl 120 55 0 0 2 0 2 2 0 8 0 kqueuepl 224 28 0 18 1 0 1 1 0 8 0 pipepl 344 131 0 103 3 0 3 3 0 8 0 fdescpl 528 457 0 426 3 0 3 3 0 8 0 filepl 160 1723 0 1492 10 0 10 10 0 8 0 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 106 0 91 1 0 1 1 0 8 0 zombiepl 144 426 0 426 1 0 1 1 0 8 1 processpl 1232 473 0 426 5 0 5 5 0 8 0 procpl 664 509 0 451 6 0 6 6 0 8 0 sockpl 752 182 0 148 4 0 4 4 0 8 0 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 15 0 0 2 0 2 2 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 126 0 0 8 0 8 8 0 8 0 bufpl 272 2435 0 105 156 0 156 156 0 8 0 anonpl 32 4788 0 0 39 0 39 39 0 247 0 amapchunkpl 152 8874 0 8317 25 1 24 24 0 158 1 amappl16 200 1498 0 1447 5 0 5 5 0 8 2 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 445 0 444 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 711 0 681 2 0 2 2 0 8 0 amappl11 160 3 0 3 2 1 1 1 0 8 1 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 291 0 290 1 0 1 1 0 8 0 amappl8 136 98 0 95 1 0 1 1 0 8 0 amappl7 128 146 0 132 1 0 1 1 0 8 0 amappl6 120 155 0 153 1 0 1 1 0 8 0 amappl5 112 100 0 89 1 0 1 1 0 8 0 amappl4 104 292 0 272 1 0 1 1 0 8 0 amappl3 96 1514 0 1420 3 0 3 3 0 8 0 amappl2 88 579 0 503 2 0 2 2 0 8 0 amappl1 80 10455 0 9859 15 0 15 15 0 8 1 amappl 88 2571 0 2401 5 0 5 5 0 92 0 uvmvnodes 80 100 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 457 0 426 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 457 0 426 1 0 1 1 0 8 0 vmmpekpl 168 5781 0 5742 2 0 2 2 0 8 0 vmmpepl 168 38388 0 36466 87 0 87 87 0 357 0 vmsppl 488 456 0 426 5 0 5 5 0 8 0 rwobjpl 80 14417 0 13365 24 0 24 24 0 8 2 pdppl 4096 921 0 852 99 14 85 87 0 8 16 pvpl 32 11996 0 0 98 0 98 98 0 265 1 pmappl 256 456 0 426 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 426 0 17 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff839d6ff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,38) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(38) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(38) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83461341) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83521cbb) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3d0520,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3d0520) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c3d06d0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff839d6ff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x76 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x76 sys/dev/acpi/acpitimer.c:120 comcnputc(800,38) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(38) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(38) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83461341) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83521cbb) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3d0520,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3d0520) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80002a2fcd20,fffff8806cf2de78,ffff80003c3d0700) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80002a2fcd20,ffff80003c3d0850,ffff80003c3d07a0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c3d0850) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d0850) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6d90a43ca00, count: -18 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: 0x6fdba9a83480, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x6fdba9a83480, count: -1