uvm_fault(0xfffffd806c1ef018, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82a55b08 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000fffe4cf0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82a55b08 Starting stack trace... panic(ffffffff833c66d9) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000fffe4c40) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001472000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff80003c4c3a28) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff80003c4c3a28) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000fffe4df0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805e8840f0,81,fffffd80097fb4e0,ffff80003c4c3a28) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bf33498,ffff80003c4c3a28) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bf33498,ffff80003c4c3a28) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806bf33498,ffff80003c4c3a28) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bf33498,ffff80003c4c3a28) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c4c3a28) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c4c3a28,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c4c3a28,ffff8000fffe5160,ffff8000fffe50b0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000fffe5160) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000fffe5160) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7906fde21630, 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 *478436 20839 0 0 0 1 syz-executor 171917 58416 0 0 0x1 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x730523b50980, 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(0xfffffd806c1ef018, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x730523b50980, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800034feae50 rbx 0 rdx 0 rcx 0xffff8000fffded28 rax 0x2a r8 0xffff800034fead80 r9 0x1 r10 0xe622c44487487566 r11 0xbc0b9c5610397236 r12 0 r13 0xffffffff825aed08 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff820e74c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800034feadd0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=478436 pid=20839 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=0xffff8000fffdea90,0xffff8000fffde040 process=0xffff8000fffeab68 user=0xffff800034fe5000, vmspace=0xfffffd806c1ef9a0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *20839 478436 84992 0 7 0 syz-executor 20839 318171 84992 0 2 0x4000000 syz-executor 5715 132989 84030 0 2 0 syz-executor 5715 371171 84030 0 3 0x4000080 bell syz-executor 58416 171917 53983 0 7 0x1 syz-executor 58416 173960 53983 0 3 0x4000080 fsleep syz-executor 53983 124264 16877 0 3 0x82 nanoslp syz-executor 76575 66403 16877 0 3 0x82 nanoslp syz-executor 20710 495812 16877 0 3 0x82 nanoslp syz-executor 26243 380850 16877 0 3 0x2 biowait syz-executor 84030 17483 16877 0 3 0x82 nanoslp syz-executor 84992 474106 16877 0 3 0x82 nanoslp syz-executor 77617 427007 16877 0 3 0x82 nanoslp syz-executor 97282 287155 16877 0 3 0x82 nanoslp syz-executor 16877 283372 35135 0 3 0x82 kqread syz-executor 35135 361218 75785 0 3 0x10008a sigsusp ksh 75785 448634 58127 0 3 0x98 kqread sshd-session 58127 441285 571 0 3 0x92 kqread sshd-session 75890 8047 1 0 3 0x100083 ttyin getty 571 90441 1 0 3 0x88 kqread sshd 9821 168685 3983 74 3 0x1100092 bpf pflogd 3983 246461 1 0 3 0x80 sbwait pflogd 65338 478039 7098 73 3 0x1100090 kqread syslogd 7098 73878 1 0 3 0x100082 sbwait syslogd 11628 142524 1 0 3 0x100080 kqread resolvd 55295 395759 8947 77 3 0x100092 kqread dhcpleased 6399 122845 8947 77 3 0x100092 kqread dhcpleased 8947 248436 1 0 3 0x80 kqread dhcpleased 42182 450299 0 0 3 0x14200 bored smr 32554 391627 0 0 2 0x14200 zerothread 22649 452864 0 0 3 0x14200 aiodoned aiodoned 40860 249852 0 0 3 0x14200 syncer update 22987 120334 0 0 3 0x14200 cleaner cleaner 48838 95168 0 0 3 0x14200 reaper reaper 49837 422667 0 0 3 0x14200 pgdaemon pagedaemon 38389 367711 0 0 3 0x14200 bored viomb 4633 459164 0 0 3 0x40014200 acpi0 acpi0 65379 10225 0 0 3 0x40014200 idle1 93848 126494 0 0 3 0x14200 bored softnet1 9852 510893 0 0 3 0x14200 netlock softnet0 39096 64491 0 0 2 0x40014200 systqmp 16295 112788 0 0 3 0x14200 bored systq 95257 453352 0 0 3 0x14200 tmoslp softclockmp 86507 339470 0 0 3 0x40014200 tmoslp softclock 78934 52109 0 0 3 0x40014200 idle0 1 58147 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 26243 (syz-executor) thread 0xffff8000fffefa08 (380850) exclusive rrwlock inode r = 0 (0xfffffd805e0c6c78) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #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:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c543eb0) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 11047K 11280K 166960K 12017 0 pcb 17 16K 17K 166960K 218 0 rtable 192 9K 10K 166960K 525 0 pf 39 18K 22K 166960K 125 0 ifaddr 35 6K 7K 166960K 90 0 ifgroup 49 2K 2K 166960K 125 0 sysctl 3 1K 9K 166960K 16 0 counters 70 36K 37K 166960K 160 0 ioctlops 0 0K 4K 166960K 1719 0 iov 0 0K 12K 166960K 38 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1341 84K 85K 166960K 1905 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 93 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 899 0 sigio 0 0K 0K 166960K 45 0 proc 75 131K 164K 166960K 673 0 subproc 72 4K 4K 166960K 92 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 84 0 in_multi 72 5K 7K 166960K 138 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 529 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 159K 173K 166960K 10042 0 UVM aobj 16 6K 6K 166960K 19 0 pinsyscall 42 84K 104K 166960K 2103 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 70 0 NDP 11 0K 1K 166960K 61 0 temp 79 8660K 8725K 166960K 39384 0 kqueue 13 20K 32K 166960K 182 0 SYN cache 2 8K 16K 166960K 3 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 94 0 91 1 0 1 1 0 8 0 rtentry 176 154 0 78 6 0 6 6 0 8 0 unpcb 144 599 0 579 4 2 2 3 0 8 1 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpqe 32 7 0 7 1 1 0 1 0 8 0 tcpcb 736 300 0 295 8 6 2 7 0 8 1 arp 136 25 0 12 1 0 1 1 0 8 0 inpcb 328 941 0 933 13 11 2 13 0 8 0 nd6 152 33 0 16 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 41 0 38 1 0 1 1 0 8 0 pppxif 1504 2 0 2 1 1 0 1 0 8 0 pfstscr 40 6 0 4 1 0 1 1 0 8 0 pffrag 232 9 0 3 1 0 1 1 0 482 0 pffrnode 88 8 0 3 1 0 1 1 0 8 0 pffrent 40 13 0 7 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 1 1 0 1 1 0 8 0 pfstitem 24 61 0 20 1 0 1 1 0 8 0 pfstkey 128 66 0 25 2 0 2 2 0 8 0 pfstate 384 62 0 23 6 0 6 6 0 8 0 pfrule 1344 32 0 22 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 652 0 303 29 3 26 29 0 8 3 art_table 40 654 0 303 5 0 5 5 0 8 0 art_node 32 153 0 86 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0 semapl 112 89 0 79 1 0 1 1 0 8 0 shmpl 112 16 0 3 1 0 1 1 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 2996 0 1487 96 0 96 96 0 8 0 ffsino 296 2996 0 1487 118 0 118 118 0 8 0 nchpl 144 4180 0 2475 64 0 64 64 0 8 0 rtmask 32 10 0 8 2 1 1 1 0 8 0 vnodes 216 3343 0 0 186 0 186 186 0 8 0 namei 1024 14014 0 14013 2 1 1 2 0 8 0 percpumem 16 95 0 45 1 0 1 1 0 8 0 kstatmem 264 84 0 60 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 21339 0 21338 9 7 2 8 1 8 1 plimitpl 152 228 0 211 1 0 1 1 0 8 0 sigapl 424 1232 0 1185 8 1 7 8 0 8 0 knotepl 120 490 0 0 15 0 15 15 0 8 0 kqueuepl 224 400 0 391 7 4 3 5 0 8 2 pipepl 344 176 0 148 3 0 3 3 0 8 0 fdescpl 528 1193 0 1162 3 0 3 3 0 8 0 filepl 160 6866 0 6636 18 4 14 15 0 8 0 lockfpl 104 307 0 304 1 0 1 1 0 8 0 lockfspl 48 118 0 115 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 45 0 28 1 0 1 1 0 8 0 ucredpl 104 985 0 971 1 0 1 1 0 8 0 zombiepl 144 1189 0 1185 1 0 1 1 0 8 0 processpl 1232 1232 0 1185 6 1 5 6 0 8 0 procpl 664 2535 0 2485 8 2 6 8 0 8 0 sosppl 176 9 0 9 1 1 0 1 0 8 0 sockpl 752 1649 0 1618 17 12 5 17 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 134 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 42 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1206 0 0 76 0 76 76 0 8 0 bufpl 280 7823 0 1686 439 0 439 439 0 8 0 anonpl 32 10859 0 0 88 0 88 88 0 246 0 amapchunkpl 152 33359 0 32865 38 4 34 34 0 158 11 amappl16 200 3927 0 3888 30 18 12 26 0 8 5 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 11 0 11 2 2 0 1 0 8 0 amappl13 176 445 0 444 1 0 1 1 0 8 0 amappl12 168 1625 0 1583 3 0 3 3 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 53 0 39 1 0 1 1 0 8 0 amappl9 144 260 0 259 1 0 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 115 0 114 1 0 1 1 0 8 0 amappl6 120 302 0 289 1 0 1 1 0 8 0 amappl5 112 82 0 72 1 0 1 1 0 8 0 amappl4 104 470 0 440 1 0 1 1 0 8 0 amappl3 96 5654 0 5560 4 1 3 3 0 8 0 amappl2 88 1327 0 1251 2 0 2 2 0 8 0 amappl1 80 13745 0 13166 14 0 14 14 0 8 0 amappl 88 9135 0 8968 5 0 5 5 0 92 0 uvmvnodes 80 3343 0 0 69 0 69 69 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 128 254 0 254 2 1 1 1 0 8 1 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 18 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1193 0 1162 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1193 0 1162 1 0 1 1 0 8 0 vmmpekpl 168 11721 0 11679 3 0 3 3 0 8 0 vmmpepl 168 83070 0 81143 106 11 95 106 0 357 6 vmsppl 488 1192 0 1162 5 0 5 5 0 8 0 rwobjpl 80 28079 0 23794 88 0 88 88 0 8 0 pdppl 4096 2393 0 2324 105 34 71 83 0 8 2 pvpl 32 19099 0 0 155 0 155 155 0 265 0 pmappl 256 1192 0 1162 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 354 0 47 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83827ff0) 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(ffffffff838dea50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838dea50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838dea50) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838dea50) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4a8e50,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838dea50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838dea50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsyscall(ffff80003c4c2038,53,28,ffff80003c4a9100) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80003c4c2038,53,28,ffff80003c4a9100) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80003c4a9100) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80003c4a9100) at syscall+0x304 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77eb916aadc0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff83827ff0) 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(ffffffff838dea50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838dea50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsofttty() at Xsofttty+0x27 __mp_lock(ffffffff838dea50) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838dea50) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4a8e50,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838dea50) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838dea50) at __mp_lock+0x192 sys/kern/kern_lock.c:165 ktrsyscall(ffff80003c4c2038,53,28,ffff80003c4a9100) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80003c4c2038,53,28,ffff80003c4a9100) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80003c4a9100) at syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80003c4a9100) at syscall+0x304 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77eb916aadc0, count: -14 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: 0x730523b50980, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x730523b50980, count: -1