uvm_fault(0xfffffd806b97e3e8, 0x98, 0, 1) -> e kernel: page fault trap, code=0 Stopped at dovutimens+0x368: movl 0x98(%rax),%r12d TID PID UID PRFLAGS PFLAGS CPU COMMAND *389550 81717 0 0 0x4000000 0K syz-executor dovutimens(ffff8000fffe27f0,fffffd806f407cf8,ffff80003c3fe830) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimens(ffff8000fffe27f0,ffff80003c3fe980,ffff80003c3fe8d0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2847 syscall(ffff80003c3fe980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fe980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6bc00c17930, count: 11 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd806b97e3e8, 0x98, 0, 1) -> e ddb{0}> trace dovutimens(ffff8000fffe27f0,fffffd806f407cf8,ffff80003c3fe830) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimens(ffff8000fffe27f0,ffff80003c3fe980,ffff80003c3fe8d0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2847 syscall(ffff80003c3fe980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fe980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6bc00c17930, count: -4 ddb{0}> show registers rdi 0xffff80002efa5000 rsi 0xf8 rbp 0xffff80003c3fe820 rbx 0x5 rdx 0xffff80002efa5000 rcx 0xf7 rax 0 r8 0x7f7fffffc000 r9 0 r10 0xe24d55e225fe7cdb r11 0x65e05e5f35fc7173 r12 0xffff80003c3fe830 r13 0x1 r14 0xfffffd806f407cf8 r15 0xffff8000fffe27f0 rip 0xffffffff8105a388 dovutimens+0x368 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c3fe720 ss 0x10 dovutimens+0x368: movl 0x98(%rax),%r12d ddb{0}> show proc PROC (syz-executor) tid=389550 pid=81717 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=77, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a255a08,0xffff8000fffe3a28 process=0xffff8000fffe49c0 user=0xffff80003c3f9000, vmspace=0xfffffd806b97e3e8 estcpu=27, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80163 25169 86912 0 2 0x100000 sh 92417 357713 83867 0 2 0x2 syz-executor 86912 33072 88573 0 3 0x10008a sigsusp sh 35476 201846 76672 0 2 0 syz-executor 81717 362022 28527 0 2 0 syz-executor *81717 389550 28527 0 7 0x4000000 syz-executor 25794 487182 1 0 2 0 syz-executor 25794 486297 1 0 2 0x4000000 syz-executor 25794 159988 1 0 3 0x4000080 fsleep syz-executor 88573 18684 83867 0 3 0x82 wait syz-executor 44009 456372 76134 0 4 0x82000 syz-executor 44009 232514 76134 0 2 0x4082000 syz-executor 44009 424042 76134 0 3 0x4082000 inode syz-executor 44009 519174 76134 0 3 0x4002000 suspend syz-executor 99722 374550 83867 0 2 0x2 syz-executor 28527 64744 83867 0 2 0xc82 syz-executor 30552 123563 83867 0 3 0x82 nanoslp syz-executor 76134 345114 83867 0 3 0x82 wait syz-executor 76672 152154 83867 0 3 0x82 nanoslp syz-executor 60924 100826 83867 0 3 0x82 wait syz-executor 83867 428209 58503 0 3 0x82 kqread syz-executor 58503 140412 67446 0 3 0x10008a sigsusp ksh 67446 229382 74839 0 3 0x98 kqread sshd-session 74839 484437 6573 0 3 0x92 kqread sshd-session 79437 484395 1 0 3 0x100083 ttyopn getty 6573 237265 1 0 3 0x88 kqread sshd 52332 362361 84542 74 3 0x1100092 bpf pflogd 84542 61143 1 0 3 0x80 sbwait pflogd 21950 96399 30939 73 3 0x1100090 kqread syslogd 30939 69350 1 0 3 0x100082 sbwait syslogd 19430 489555 1 0 3 0x100080 kqread resolvd 74031 249695 98769 77 3 0x100092 kqread dhcpleased 7043 155864 98769 77 3 0x100092 kqread dhcpleased 98769 21008 1 0 3 0x80 kqread dhcpleased 93967 151226 0 0 3 0x14200 bored smr 81775 320013 0 0 2 0x14200 zerothread 1131 363282 0 0 3 0x14200 aiodoned aiodoned 67085 522060 0 0 3 0x14200 syncer update 83630 284862 0 0 3 0x14200 cleaner cleaner 33361 92891 0 0 3 0x14200 reaper reaper 70777 322009 0 0 3 0x14200 pgdaemon pagedaemon 68257 464060 0 0 3 0x14200 bored viomb 4794 274132 0 0 3 0x40014200 acpi0 acpi0 69934 287063 0 0 3 0x40014200 idle1 88834 524271 0 0 3 0x14200 bored softnet1 92186 362446 0 0 3 0x14200 bored softnet0 37584 482517 0 0 3 0x14200 bored systqmp 4528 460944 0 0 3 0x14200 bored systq 55204 468242 0 0 3 0x14200 tmoslp softclockmp 76801 451121 0 0 3 0x40014200 tmoslp softclock 72861 205119 0 0 3 0x40014200 idle0 1 102196 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b49ba10) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 #4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 #5 exit1+0x6fc sys/kern/kern_exit.c:260 #6 sys_exit+0x1a sys/kern/kern_exit.c:-1 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #8 Xsyscall+0x128 Process 81717 (syz-executor) thread 0xffff8000fffe27f0 (389550) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a18d80) #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 44009 (syz-executor) thread 0xffff8000fffe9ca8 (232514) exclusive rrwlock inode r = 0 (0xfffffd806b557318) #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:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #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 44009 (syz-executor) thread 0xffff8000fffe2a88 (424042) exclusive rrwlock inode r = 0 (0xfffffd806b557440) #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:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1611 #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 99722 (syz-executor) thread 0xffff80002a254d10 (374550) exclusive rrwlock inode r = 0 (0xfffffd806b557ea8) #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 (0xfffffd806ce93c48) #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: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: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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11058 12091K 12445K 166960K 12484 0 pcb 17 14K 16K 166960K 144 0 rtable 227 10K 12K 166960K 444 0 pf 35 17K 22K 166960K 192 0 ifaddr 41 7K 8K 166960K 61 0 ifgroup 51 2K 2K 166960K 79 0 sysctl 3 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1572 0 iov 0 0K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1321 83K 84K 166960K 1633 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 78 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 397 0 sigio 0 0K 0K 166960K 5 0 proc 73 115K 180K 166960K 574 0 subproc 73 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 17 0 in_multi 94 6K 7K 166960K 118 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 408 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 168K 173K 166960K 5450 0 UVM aobj 10 2K 2K 166960K 12 0 pinsyscall 42 84K 106K 166960K 1539 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 11 0K 1K 166960K 37 0 temp 55 9078K 9142K 166960K 20591 0 kqueue 14 22K 28K 166960K 65 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 47 0 44 1 0 1 1 0 8 0 rtentry 176 124 0 33 5 0 5 5 0 8 0 unpcb 144 199 0 173 4 2 2 4 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 165 0 161 7 3 4 7 0 8 3 arp 136 21 0 5 1 0 1 1 0 8 0 inpcb 328 496 0 489 7 1 6 7 0 8 5 nd6 152 24 0 3 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 12 0 12 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 4 0 3 1 0 1 1 0 482 0 pffrnode 88 4 0 3 1 0 1 1 0 8 0 pffrent 40 7 0 6 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 8 0 6 1 0 1 1 0 8 0 pfanchor 1288 4 0 1 1 0 1 1 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 35 0 1 1 0 1 1 0 8 0 pfstkey 128 37 0 3 2 0 2 2 0 8 0 pfstate 448 36 0 2 4 0 4 4 0 8 0 pfrule 1360 50 0 21 3 0 3 3 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 519 0 114 30 1 29 30 0 8 1 art_table 40 523 0 114 5 0 5 5 0 8 0 art_node 32 124 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 76 0 66 1 0 1 1 0 8 0 shmpl 112 9 0 2 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2082 0 621 93 0 93 93 0 8 0 ffsino 296 2082 0 621 114 0 114 114 0 8 0 nchpl 144 2624 0 922 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 2317 0 0 129 0 129 129 0 8 0 namei 1024 8498 0 8496 2 1 1 2 0 8 0 percpumem 16 64 0 15 1 0 1 1 0 8 0 pfiaddrpl 120 24 0 1 1 0 1 1 0 8 0 kstatmem 264 44 0 20 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 11562 0 11562 11 3 8 8 1 8 8 plimitpl 152 113 0 94 1 0 1 1 0 8 0 sigapl 424 706 0 658 7 1 6 7 0 8 0 knotepl 120 596 0 0 19 0 19 19 0 8 0 kqueuepl 224 155 0 144 4 1 3 3 0 8 2 pipepl 344 149 0 121 3 0 3 3 0 8 0 fdescpl 528 690 0 659 3 0 3 3 0 8 0 filepl 160 3664 0 3438 14 1 13 14 0 8 3 lockfpl 104 107 0 105 1 0 1 1 0 8 0 lockfspl 48 48 0 46 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 40 0 22 1 0 1 1 0 8 0 ucredpl 104 370 0 357 1 0 1 1 0 8 0 zombiepl 144 660 0 658 1 0 1 1 0 8 0 processpl 1232 706 0 658 5 0 5 5 0 8 0 procpl 664 1181 0 1127 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 749 0 713 11 2 9 11 0 8 4 mcl64k 65536 5 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 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 45 0 0 2 0 2 2 0 8 0 mbufpl 256 267 0 0 17 0 17 17 0 8 0 bufpl 280 4217 0 107 294 0 294 294 0 8 0 anonpl 32 6931 0 0 56 0 56 56 0 246 0 amapchunkpl 152 16560 0 16126 25 3 22 25 0 158 2 amappl16 200 2631 0 2387 14 1 13 13 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 432 0 428 1 0 1 1 0 8 0 amappl13 176 119 0 107 1 0 1 1 0 8 0 amappl12 168 944 0 915 2 0 2 2 0 8 0 amappl11 160 23 0 23 1 1 0 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 264 0 263 1 0 1 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 160 0 147 1 0 1 1 0 8 0 amappl6 120 174 0 172 1 0 1 1 0 8 0 amappl5 112 97 0 85 1 0 1 1 0 8 0 amappl4 104 285 0 267 1 0 1 1 0 8 0 amappl3 96 3218 0 3118 4 0 4 4 0 8 0 amappl2 88 517 0 455 2 0 2 2 0 8 0 amappl1 80 10293 0 9685 15 2 13 15 0 8 0 amappl 88 4689 0 4538 5 0 5 5 0 92 0 uvmvnodes 80 106 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 128 254 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 11 0 2 1 0 1 1 0 8 0 uaddrrnd 24 690 0 659 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 690 0 659 1 0 1 1 0 8 0 vmmpekpl 168 7367 0 7324 3 0 3 3 0 8 0 vmmpepl 168 51271 0 49212 96 0 96 96 0 357 0 vmsppl 488 689 0 658 5 1 4 5 0 8 0 rwobjpl 80 17199 0 15927 27 0 27 27 0 8 0 pdppl 4096 1387 0 1316 97 26 71 85 0 8 0 pvpl 32 13552 0 0 111 1 110 110 0 265 0 pmappl 256 689 0 658 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 288 0 34 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace dovutimens(ffff8000fffe27f0,fffffd806f407cf8,ffff80003c3fe830) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimens(ffff8000fffe27f0,ffff80003c3fe980,ffff80003c3fe8d0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2847 syscall(ffff80003c3fe980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fe980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6bc00c17930, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299bdff0) 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(ffffffff83a18580) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a18580) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff8000fffe34e8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff8000fffe34e8,ffff80003c4283b0,ffff80003c428300) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4283b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4283b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5a6f087e20, count: 7 ddb{1}> trace x86_ipi_db(ffff8000299bdff0) 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(ffffffff83a18580) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a18580) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff8000fffe34e8,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff8000fffe34e8,ffff80003c4283b0,ffff80003c428300) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4283b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4283b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f5a6f087e20, count: -8