uvm_fault(0xfffffd806c273d70, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff827cebe8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c4db970 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff827cebe8 Starting stack trace... panic(ffffffff833d061e) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4db8c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000162a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003a810568) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003a810568) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c4dba70) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806c284048,81,fffffd80097fb6e8,ffff80003a810568) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c91bb48,ffff80003a810568) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c91bb48,ffff80003a810568) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c91bb48,ffff80003a810568) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c91bb48,ffff80003a810568) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a810568) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003a810568,b,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a810568,ffff80003c4dbde0,ffff80003c4dbd30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4dbde0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4dbde0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x716766673630, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *125594 76931 0 0 0 1 syz-executor 374418 39738 0 0 0 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cac94d02b00, 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(0xfffffd806c273d70, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cac94d02b00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a32e1a0 rbx 0 rdx 0 rcx 0xffff8000fffef240 rax 0x2a r8 0xffff80002a32e0d0 r9 0x1 r10 0x872c8731c8ab9379 r11 0xebcec12ca419ec3b r12 0 r13 0xffffffff81772838 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff812b34c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a32e120 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=125594 pid=76931 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a810568,0xffff8000fffef780 process=0xffff80003c4a9838 user=0xffff80002a329000, vmspace=0xfffffd806c2735d0 estcpu=36, cpticks=3, pctcpu=0.0, user=3, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *76931 125594 6558 0 7 0 syz-executor 76931 240750 6558 0 3 0x4000000 smrbar syz-executor 39738 374418 7453 0 7 0 syz-executor 39738 347528 7453 0 3 0x4000000 smrbar syz-executor 39738 443044 7453 0 3 0x4000080 fsleep syz-executor 60906 156269 46914 0 3 0x80 nanoslp syz-executor 60906 50770 46914 0 3 0x4000080 kqread syz-executor 60906 305257 46914 0 3 0x4000080 kqsel syz-executor 60906 374836 46914 0 3 0x4000080 fsleep syz-executor 24858 325022 16486 0 3 0x80 nanoslp syz-executor 24858 55772 16486 0 3 0x4000080 tunread syz-executor 24858 44242 16486 0 3 0x4000080 tunread syz-executor 24858 461159 16486 0 3 0x4000080 fsleep syz-executor 89708 498316 37831 0 3 0x80 nanoslp syz-executor 89708 508055 37831 0 3 0x4000080 kqsel syz-executor 89708 400933 37831 0 3 0x4000080 fsleep syz-executor 89708 510494 37831 0 3 0x4000080 fsleep syz-executor 37831 183946 21942 0 3 0x82 nanoslp syz-executor 6558 328530 21942 0 3 0x82 nanoslp syz-executor 7453 482112 21942 0 3 0x82 nanoslp syz-executor 17029 422943 21942 0 3 0x82 nanoslp syz-executor 26613 392927 1 0 3 0x100083 ttyin getty 25622 274428 0 0 3 0x14280 nfsidl nfsio 37009 438211 0 0 3 0x14280 nfsidl nfsio 51756 238483 0 0 3 0x14280 nfsidl nfsio 50249 188197 0 0 3 0x14280 nfsidl nfsio 39886 299098 0 0 3 0x14280 nfsidl nfsio 35214 412804 0 0 3 0x14280 nfsidl nfsio 46244 478435 0 0 3 0x14280 nfsidl nfsio 58472 58219 0 0 3 0x14280 nfsidl nfsio 1453 279981 0 0 3 0x14280 nfsidl nfsio 42901 144977 0 0 3 0x14280 nfsidl nfsio 42223 65731 0 0 3 0x14280 nfsidl nfsio 53652 25532 0 0 3 0x14280 nfsidl nfsio 26269 378164 0 0 3 0x14280 nfsidl nfsio 51687 68514 0 0 3 0x14280 nfsidl nfsio 30378 347435 0 0 3 0x14280 nfsidl nfsio 18090 166217 0 0 3 0x14280 nfsidl nfsio 34667 134602 0 0 3 0x14280 nfsidl nfsio 94938 450647 0 0 3 0x14280 nfsidl nfsio 7077 450968 21942 0 3 0x82 nanoslp syz-executor 50098 322156 21942 0 3 0x82 nanoslp syz-executor 46914 162897 21942 0 3 0x82 nanoslp syz-executor 16486 146672 21942 0 3 0x82 nanoslp syz-executor 21942 94879 90026 0 3 0x82 kqread syz-executor 90026 268613 82231 0 3 0x10008a sigsusp ksh 82231 69970 88544 0 3 0x98 kqread sshd-session 88544 209936 63879 0 3 0x92 kqread sshd-session 63879 323034 1 0 3 0x88 kqread sshd 24103 180546 70715 74 3 0x1100092 bpf pflogd 70715 217356 1 0 3 0x80 sbwait pflogd 80464 389079 11304 73 3 0x1100090 kqread syslogd 11304 61430 1 0 3 0x100082 sbwait syslogd 91707 442380 1 0 3 0x100080 kqread resolvd 9652 148653 87155 77 3 0x100092 kqread dhcpleased 35191 439346 87155 77 3 0x100092 kqread dhcpleased 87155 330506 1 0 3 0x80 kqread dhcpleased 18573 356343 0 0 3 0x14200 bored smr 485 361895 0 0 3 0x14200 pgzero zerothread 36666 373190 0 0 3 0x14200 aiodoned aiodoned 81502 54207 0 0 3 0x14200 syncer update 50554 464797 0 0 3 0x14200 cleaner cleaner 32445 217724 0 0 3 0x14200 reaper reaper 99534 155412 0 0 3 0x14200 pgdaemon pagedaemon 54298 458845 0 0 3 0x14200 bored viomb 9682 286151 0 0 3 0x40014200 acpi0 acpi0 67890 22922 0 0 3 0x40014200 idle1 93516 472479 0 0 3 0x14200 bored softnet1 11020 154934 0 0 3 0x14200 netlock softnet0 86105 464722 0 0 2 0x14200 systqmp 84431 430564 0 0 3 0x14200 bored systq 99150 341554 0 0 3 0x14200 tmoslp softclockmp 18224 461904 0 0 3 0x40014200 tmoslp softclock 68798 10241 0 0 3 0x40014200 idle0 1 224326 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10264 11225K 12685K 166960K 20129 0 pcb 19 18K 25K 166960K 1381 0 rtable 231 14K 14K 166960K 1863 0 pf 41 18K 19K 166960K 488 0 ifaddr 40 8K 8K 166960K 357 0 ifgroup 66 2K 3K 166960K 657 0 sysctl 4 1K 9K 166960K 82 0 counters 78 37K 38K 166960K 798 0 ioctlops 0 0K 4K 166960K 2829 0 iov 0 0K 28K 166960K 458 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1455 91K 92K 166960K 7202 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 10K 166960K 88 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 407 0 dirhash 12 2K 2K 166960K 126 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 5589 0 sigio 0 0K 0K 166960K 174 0 proc 73 115K 163K 166960K 1686 0 subproc 72 4K 4K 166960K 245 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 775 0 in_multi 64 4K 7K 166960K 532 0 ether_multi 1 0K 0K 166960K 79 0 mrt 1 0K 0K 166960K 46 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 1225 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 14 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 281 144K 167K 166960K 49887 0 UVM aobj 218 37K 41K 166960K 236 0 pinsyscall 43 86K 102K 166960K 7163 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 298 0 NDP 15 0K 2K 166960K 263 0 temp 89 8664K 8920K 166960K 288019 0 kqueue 17 28K 33K 166960K 968 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 120 691 0 688 8 5 3 3 0 8 2 rtentry 176 660 0 579 6 1 5 6 0 8 0 unpcb 144 4281 0 4259 52 47 5 10 0 8 4 syncache 336 9 0 9 6 6 0 1 0 8 0 tcpqe 32 4 0 4 2 2 0 1 0 8 0 tcpcb 736 1724 0 1719 39 38 1 9 0 8 0 arp 136 144 0 126 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 328 5988 0 5977 56 52 4 13 0 8 2 nd6 152 97 0 81 2 1 1 2 0 8 0 pkpcb 40 145 0 145 14 13 1 1 0 8 1 kcovpl 48 27 0 19 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 287 0 283 9 8 1 1 0 8 0 pppxif 1504 96 0 96 13 12 1 1 0 8 1 pffrag 232 80 0 69 1 0 1 1 0 482 0 pffrnode 88 39 0 29 1 0 1 1 0 8 0 pffrent 40 144 0 133 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 pfstitem 24 352 0 256 1 0 1 1 0 8 0 pfstkey 128 352 0 256 4 0 4 4 0 8 0 pfstate 448 352 0 256 12 0 12 12 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 6 0 0 6 0 6 6 0 8 0 art_heap4 256 2047 0 1743 37 17 20 30 0 8 0 art_table 40 2053 0 1743 5 0 5 5 0 8 0 art_node 32 650 0 580 2 0 2 2 0 8 0 sysvmsgpl 40 25 0 15 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 394 0 384 1 0 1 1 0 8 0 shmpl 112 214 0 13 6 0 6 6 0 8 0 dirhash 1024 93 0 76 3 0 3 3 0 8 0 dino2pl 256 12510 0 10969 97 0 97 97 0 8 0 ffsino 296 12510 0 10969 120 0 120 120 0 8 0 nchpl 144 20123 0 19459 65 38 27 65 0 8 0 rtmask 32 46 0 46 9 9 0 1 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 71903 0 71903 6 5 1 2 0 8 1 percpumem 16 414 0 360 1 0 1 1 0 8 0 vcpupl 3968 18 0 4 2 0 2 2 0 8 0 vmpool 840 19 0 5 2 0 2 2 0 8 0 kstatmem 264 420 0 386 8 5 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 36 0 36 16 15 1 1 0 8 1 scxspl 216 160635 0 160635 26 25 1 8 1 8 1 plimitpl 152 1644 0 1627 1 0 1 1 0 8 0 sigapl 424 5856 0 5790 10 2 8 8 0 8 0 knotepl 120 741 0 0 17 0 17 17 0 8 0 kqueuepl 224 2120 0 2099 28 25 3 5 0 8 1 pipepl 344 744 0 715 12 9 3 9 0 8 0 fdescpl 528 5772 0 5740 3 0 3 3 0 8 0 filepl 160 43369 0 43124 75 58 17 23 0 8 5 lockfpl 104 2639 0 2546 5 1 4 5 0 8 0 lockfspl 48 1077 0 1041 3 1 2 2 0 8 0 sessionpl 144 49 0 40 1 0 1 1 0 8 0 pgrppl 48 220 0 203 1 0 1 1 0 8 0 ucredpl 104 9139 0 9126 1 0 1 1 0 8 0 zombiepl 144 7437 0 7434 3 2 1 1 0 8 0 processpl 1232 5856 0 5790 7 1 6 6 0 8 0 procpl 664 14574 0 14496 10 2 8 8 0 8 0 sosppl 176 50 0 50 13 13 0 1 0 8 0 sockpl 752 11307 0 11271 145 134 11 28 0 8 6 mcl64k 65536 29 0 0 4 0 4 4 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 121 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 103 0 0 6 0 6 6 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 2831 0 0 177 0 177 177 0 8 0 bufpl 280 66390 0 60253 439 0 439 439 0 8 0 anonpl 32 15414 0 0 123 0 123 123 0 246 0 amapchunkpl 152 199730 0 199096 110 77 33 41 0 158 6 amappl16 200 21561 0 21524 170 154 16 38 0 8 5 amappl15 192 23 0 23 1 1 0 1 0 8 0 amappl14 184 10 0 9 2 1 1 1 0 8 0 amappl13 176 654 0 653 1 0 1 1 0 8 0 amappl12 168 6278 0 6235 3 0 3 3 0 8 0 amappl11 160 15 0 15 4 4 0 1 0 8 0 amappl10 152 54 0 40 1 0 1 1 0 8 0 amappl9 144 255 0 254 2 1 1 1 0 8 0 amappl8 136 51 0 47 1 0 1 1 0 8 0 amappl7 128 157 0 155 1 0 1 1 0 8 0 amappl6 120 592 0 578 1 0 1 1 0 8 0 amappl5 112 79 0 67 1 0 1 1 0 8 0 amappl4 104 536 0 504 1 0 1 1 0 8 0 amappl3 96 32004 0 31888 4 1 3 3 0 8 0 amappl2 88 5834 0 5754 2 0 2 2 0 8 0 amappl1 80 32888 0 32290 14 0 14 14 0 8 0 amappl 88 47963 0 47758 5 0 5 5 0 92 0 uvmvnodes 80 251 0 0 6 0 6 6 0 8 0 dma65536 65536 6 0 6 4 3 1 1 0 8 1 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 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 12 0 12 5 5 0 1 0 8 0 dma128 128 259 0 259 7 7 0 1 0 8 0 dma64 64 11 0 11 6 6 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 235 0 18 4 0 4 4 0 8 0 uaddrrnd 24 5772 0 5740 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5772 0 5740 1 0 1 1 0 8 0 vmmpekpl 168 40943 0 40873 4 0 4 4 0 8 0 vmmpepl 168 362094 0 360031 189 87 102 116 0 357 1 vmsppl 488 5771 0 5740 12 7 5 5 0 8 0 rwobjpl 80 91766 0 90292 60 19 41 43 0 8 0 pdppl 4096 11590 0 11504 157 70 87 92 0 8 1 pvpl 32 23820 0 0 192 1 191 191 0 265 0 pmappl 256 5790 0 5745 4 0 4 4 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 587 0 149 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83846ff0) 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 __mp_lock(ffffffff83960c80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83960c80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 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(ffffffff83960c80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83960c80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83960c80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83960c80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 uvm_fault(fffffd806721cb70,a77fd4bc000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff80002a3429b0,a77fd4bc000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 end trace frame: 0xffff80002a3429a0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83846ff0) 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 __mp_lock(ffffffff83960c80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83960c80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 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(ffffffff83960c80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83960c80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83960c80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83960c80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 uvm_fault(fffffd806721cb70,a77fd4bc000,0,1) at uvm_fault+0x1ea sys/uvm/uvm_fault.c:656 upageflttrap(ffff80002a3429b0,a77fd4bc000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a3429b0) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:622 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7da189c7cac0, count: -16 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: 0x7cac94d02b00, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7cac94d02b00, count: -1