uvm_fault(0xfffffd8064d13d80, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81ab3eb8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c6923c0 gsbase 0xffff8000299bdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81ab3eb8 Starting stack trace... panic(ffffffff83487d88) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c692310) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000fffdd4f8,fffffd805f63c720,ffff80003c6924f0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimes(ffff8000fffdd4f8,ffff80003c692640,ffff80003c692590) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2813 syscall(ffff80003c692640) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c692640) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3cbfe4e5140, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 1471343056 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 9671 70506 0 0 0 1 syz-executor 466549 95159 0 0x14000 0x200 0 reaper savectx() at savectx+0xae end of kernel end trace frame: 0x753e43f66a20, 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(0xfffffd8064d13d80, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x753e43f66a20, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c5da2e0 rbx 0 rdx 0 rcx 0xffff8000fffde2c8 rax 0x3b r8 0xffff80003c5da210 r9 0x1 r10 0x31d3bc3b009ee3c2 r11 0xf0bdf428a49763b0 r12 0 r13 0 r14 0xffff8000fffde2c8 r15 0 rip 0xffffffff817bd3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c5da260 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=9671 pid=70506 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=0xffff8000fffdea90,0xffff8000fffdd508 process=0xffff8000fffd9370 user=0xffff80003c5d5000, vmspace=0xfffffd8064d13d80 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74886 414688 19057 0 2 0x1010008a sh 19378 97207 41845 0 2 0 syz-executor 19378 297581 41845 0 3 0x4000080 fsleep syz-executor 19378 433207 41845 0 3 0x4000080 fsleep syz-executor *70506 9671 63873 0 7 0 syz-executor 70506 441197 63873 0 3 0x4000000 sbar syz-executor 42245 383987 67257 0 2 0 syz-executor 42245 470534 67257 0 3 0x4000080 fsleep syz-executor 23692 165576 44191 0 2 0 syz-executor 23692 12533 44191 0 3 0x4000080 fsleep syz-executor 23692 374438 44191 0 3 0x4000080 fsleep syz-executor 19057 409263 2922 0 3 0x82 wait syz-executor 67106 296871 6115 0 3 0x80 nanoslp syz-executor 67106 269165 6115 0 3 0x4000080 dtread syz-executor 67106 66817 6115 0 3 0x4000080 fsleep syz-executor 93146 485449 0 0 3 0x14200 acct acct 55064 310145 0 0 3 0x14280 nfsidl nfsio 43054 175762 0 0 3 0x14280 nfsidl nfsio 87543 178104 0 0 3 0x14280 nfsidl nfsio 69431 344481 0 0 3 0x14280 nfsidl nfsio 71207 350652 0 0 3 0x14280 nfsidl nfsio 64139 480547 0 0 3 0x14280 nfsidl nfsio 71380 102269 0 0 3 0x14280 nfsidl nfsio 1379 160342 0 0 3 0x14280 nfsidl nfsio 54232 221341 0 0 3 0x14280 nfsidl nfsio 51766 438925 0 0 3 0x14280 nfsidl nfsio 39314 352058 0 0 3 0x14280 nfsidl nfsio 18181 259697 0 0 3 0x14280 nfsidl nfsio 46591 202201 0 0 3 0x14280 nfsidl nfsio 84557 454338 0 0 3 0x14280 nfsidl nfsio 59671 348552 0 0 3 0x14280 nfsidl nfsio 35889 333867 0 0 3 0x14280 nfsidl nfsio 86886 175736 0 0 3 0x14280 nfsidl nfsio 25603 110643 0 0 3 0x14280 nfsidl nfsio 17281 363530 0 0 3 0x14280 nfsidl nfsio 67288 173377 0 0 3 0x14280 nfsidl nfsio 6115 360740 2922 0 3 0x82 nanoslp syz-executor 44191 398718 2922 0 3 0x82 nanoslp syz-executor 39040 41546 2922 0 2 0x2 syz-executor 67257 17257 2922 0 3 0x82 nanoslp syz-executor 63873 116519 2922 0 3 0x82 nanoslp syz-executor 55625 470262 2922 0 3 0x82 nanoslp syz-executor 41845 510621 2922 0 3 0x82 nanoslp syz-executor 2922 373868 54335 0 3 0x82 kqread syz-executor 54335 20659 93106 0 3 0x10008a sigsusp ksh 93106 300928 50373 0 3 0x98 kqread sshd-session 50373 110528 1675 0 3 0x92 kqread sshd-session 1426 304324 1 0 3 0x100083 ttyopn getty 1675 78279 1 0 3 0x88 kqread sshd 91106 100759 73053 74 3 0x1100092 bpf pflogd 73053 183945 1 0 3 0x80 sbwait pflogd 57261 361382 29399 73 3 0x1100090 kqread syslogd 29399 435183 1 0 3 0x100082 sbwait syslogd 55300 181371 1 0 3 0x100080 kqread resolvd 77755 311929 73919 77 3 0x100092 kqread dhcpleased 80683 464050 73919 77 3 0x100092 kqread dhcpleased 73919 98849 1 0 3 0x80 kqread dhcpleased 63780 464749 0 0 3 0x14200 pause smr 14168 171749 0 0 2 0x14200 zerothread 60252 492160 0 0 3 0x14200 aiodoned aiodoned 77074 61590 0 0 3 0x14200 syncer update 24843 488702 0 0 3 0x14200 cleaner cleaner 95159 466549 0 0 7 0x14200 reaper 46912 12725 0 0 3 0x14200 pgdaemon pagedaemon 92083 512035 0 0 3 0x14200 bored viomb 85785 29685 0 0 3 0x40014200 acpi0 acpi0 8926 330871 0 0 3 0x40014200 idle1 98825 195396 0 0 3 0x14200 bored softnet1 67975 196659 0 0 3 0x14200 netlock softnet0 92091 491965 0 0 3 0x14200 smrbar systqmp 33618 386666 0 0 3 0x14200 bored systq 42951 72473 0 0 3 0x14200 tmoslp softclockmp 48101 204016 0 0 3 0x40014200 tmoslp softclock 76711 506093 0 0 3 0x40014200 idle0 1 35827 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 70506 (syz-executor) thread 0xffff8000fffdd4f8 (441197) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d2f80) #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 39040 (syz-executor) thread 0xffff8000fffeefa8 (41546) exclusive rrwlock inode r = 0 (0xfffffd800f8e1440) #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: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:3143 #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 (0xfffffd806cdaa1e0) #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+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3128 #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 92091 (systqmp) thread 0xffff8000ffffe000 (491965) shared rwlock systqmp r = 0 (0xffffffff839253f8) #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 11105 12185K 12486K 166960K 13008 0 pcb 18 12K 12K 166960K 103 0 rtable 190 8K 8K 166960K 454 0 pf 37 18K 25K 166960K 107 0 ifaddr 38 6K 7K 166960K 65 0 ifgroup 52 2K 2K 166960K 90 0 sysctl 4 1K 9K 166960K 12 0 counters 70 37K 37K 166960K 96 0 ioctlops 0 0K 8K 166960K 1666 0 iov 1 2K 16K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1360 86K 86K 166960K 1971 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 32 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 106K 166960K 655 0 sigio 0 0K 0K 166960K 6 0 proc 72 115K 164K 166960K 625 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 165 0 in_multi 77 5K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 471 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 224 164K 185K 166960K 7814 0 UVM aobj 15 2K 2K 166960K 19 0 pinsyscall 41 82K 106K 166960K 1846 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 14 0K 2K 166960K 41 0 temp 78 9088K 9159K 166960K 32110 0 kqueue 13 20K 32K 166960K 114 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 63 0 60 1 0 1 1 0 8 0 rtentry 176 136 0 60 6 0 6 6 0 8 0 unpcb 144 346 0 329 4 3 1 4 0 8 0 syncache 336 11 0 11 2 1 1 1 0 8 1 tcpcb 736 160 0 156 4 3 1 4 0 8 0 arp 136 23 0 8 1 0 1 1 0 8 0 inpcb 328 482 0 474 6 4 2 5 0 8 1 nd6 152 27 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 8 0 8 2 1 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 2 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 0 5 5 0 8 5 pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 5 0 1 1 0 1 1 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 55 0 14 1 0 1 1 0 8 0 pfstkey 128 61 0 20 2 0 2 2 0 8 0 pfstate 448 56 0 17 5 0 5 5 0 8 0 pfrule 1360 31 0 23 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 553 0 211 29 1 28 29 0 8 2 art_table 40 554 0 211 5 0 5 5 0 8 0 art_node 32 136 0 65 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 2 1 1 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 16 0 4 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2582 0 1123 93 0 93 93 0 8 0 ffsino 296 2582 0 1123 114 0 114 114 0 8 0 nchpl 144 3497 0 1796 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 3027 0 0 169 0 169 169 0 8 0 namei 1024 11792 0 11791 2 1 1 2 0 8 0 percpumem 16 63 0 13 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 50 0 22 4 1 3 3 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 16966 0 16966 9 7 2 8 1 8 2 plimitpl 152 180 0 163 1 0 1 1 0 8 0 sigapl 424 987 0 918 9 1 8 8 0 8 0 knotepl 120 551 0 0 17 0 17 17 0 8 0 kqueuepl 224 159 0 150 1 0 1 1 0 8 0 pipepl 344 221 0 129 9 0 9 9 0 8 0 fdescpl 528 950 0 920 3 0 3 3 0 8 0 filepl 160 5361 0 5015 18 3 15 15 0 8 0 lockfpl 104 212 0 210 1 0 1 1 0 8 0 lockfspl 48 92 0 90 1 0 1 1 0 8 0 sessionpl 144 48 0 39 1 0 1 1 0 8 0 pgrppl 48 58 0 41 1 0 1 1 0 8 0 ucredpl 104 957 0 944 1 0 1 1 0 8 0 zombiepl 144 920 0 918 1 0 1 1 0 8 0 processpl 1232 987 0 918 7 1 6 6 0 8 0 procpl 664 1855 0 1778 8 0 8 8 0 8 0 sosppl 176 5 0 5 2 1 1 1 0 8 1 sockpl 752 915 0 887 11 6 5 10 0 8 2 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 182 0 0 11 0 11 11 0 8 0 bufpl 280 7380 0 1250 438 0 438 438 0 8 0 anonpl 32 10230 0 0 83 0 83 83 0 246 0 amapchunkpl 152 25978 0 25542 36 3 33 33 0 158 14 amappl16 200 3444 0 3416 31 18 13 24 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 452 0 449 1 0 1 1 0 8 0 amappl13 176 134 0 122 1 0 1 1 0 8 0 amappl12 168 1210 0 1181 2 0 2 2 0 8 0 amappl11 160 117 0 116 1 0 1 1 0 8 0 amappl10 152 69 0 55 1 0 1 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 103 0 101 1 0 1 1 0 8 0 amappl7 128 154 0 140 1 0 1 1 0 8 0 amappl6 120 172 0 167 1 0 1 1 0 8 0 amappl5 112 108 0 97 1 0 1 1 0 8 0 amappl4 104 311 0 290 1 0 1 1 0 8 0 amappl3 96 4874 0 4770 4 0 4 4 0 8 0 amappl2 88 583 0 521 2 0 2 2 0 8 0 amappl1 80 13370 0 12766 19 2 17 17 0 8 3 amappl 88 6945 0 6795 5 0 5 5 0 92 0 uvmvnodes 80 123 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 18 0 4 1 0 1 1 0 8 0 uaddrrnd 24 950 0 920 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 950 0 920 1 0 1 1 0 8 0 vmmpekpl 168 10079 0 10026 3 0 3 3 0 8 0 vmmpepl 168 70312 0 68468 114 3 111 111 0 357 20 vmsppl 488 949 0 920 6 1 5 5 0 8 0 rwobjpl 80 22436 0 21368 34 2 32 32 0 8 2 pdppl 4096 1907 0 1840 115 42 73 87 0 8 6 pvpl 32 17204 0 0 139 0 139 139 0 265 0 pmappl 256 949 0 920 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 51 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83940ff0) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 reaper(ffff8000ffffd4c8) at reaper+0x211 sys/kern/kern_exit.c:505 end trace frame: 0x0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff83940ff0) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 reaper(ffff8000ffffd4c8) at reaper+0x211 sys/kern/kern_exit.c:505 end trace frame: 0x0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x753e43f66a20, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x753e43f66a20, count: -1