panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 14249 35021 32767 0x10 0x4000000 1 syz-executor.2 *372373 35021 32767 0x10 0x4000000 0K syz-executor.2 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258f93e) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826047d1,ffffffff82562dbe,66b,ffffffff8257229d) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c094a20,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c094a20,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212587e8,ffff8000211f3748,ffff8000211f37a0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000211f3810) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211f3810) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x64640c8750, count: 7 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: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258f93e) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826047d1,ffffffff82562dbe,66b,ffffffff8257229d) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c094a20,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c094a20,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212587e8,ffff8000211f3748,ffff8000211f37a0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000211f3810) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211f3810) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x64640c8750, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211f34d0 rbx 0xffffffff82987bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff8000212587e8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3ff001006fb17ba5 r11 0xb2abc26f452b295b r12 0xffffffff82987a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81d684c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211f34c0 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.2) pid=372373 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021259508,0xffff800021259cf8 process=0xffff80002c92f200 user=0xffff8000211ee000, vmspace=0xfffffd806c094a20 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 30557 18468 30848 32767 2 0x10 syz-executor.4 35021 215560 81404 32767 2 0x490 syz-executor.2 35021 14249 81404 32767 7 0x4000010 syz-executor.2 *35021 372373 81404 32767 7 0x4000010 syz-executor.2 35021 442171 81404 32767 3 0x4000090 fsleep syz-executor.2 48114 401268 99884 32767 2 0x10 syz-executor.3 48114 278302 99884 32767 3 0x4000090 fsleep syz-executor.3 22468 86534 11273 32767 2 0x10 syz-executor.6 58754 308035 96055 32767 2 0x490 syz-executor.7 96055 184378 7374 0 3 0x82 wait syz-executor.7 30848 485622 71034 32767 2 0x490 syz-executor.4 71034 236126 7374 0 3 0x82 wait syz-executor.4 99884 183631 35293 32767 2 0x490 syz-executor.3 35293 427925 7374 0 3 0x82 wait syz-executor.3 79509 43801 36256 32767 3 0x90 piperd syz-executor.1 36256 360424 7374 0 3 0x82 wait syz-executor.1 94489 280592 89664 32767 2 0x10 syz-executor.0 89664 218162 7374 0 3 0x82 wait syz-executor.0 81404 183547 82998 32767 2 0x490 syz-executor.2 82998 353004 7374 0 3 0x82 wait syz-executor.2 37857 28660 0 0 3 0x14200 bored sosplice 11273 115252 71890 32767 2 0x490 syz-executor.6 71890 80476 7374 0 3 0x82 wait syz-executor.6 72979 61130 79161 32767 3 0x90 piperd syz-executor.5 79161 260794 7374 0 3 0x82 wait syz-executor.5 7374 486972 83746 0 3 0x82 kqread syz-fuzzer 7374 247954 83746 0 2 0x4000482 syz-fuzzer 7374 21822 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 55208 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 384442 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 47719 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 303792 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 84657 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 101131 83746 0 3 0x4000082 thrsleep syz-fuzzer 7374 281435 83746 0 3 0x4000082 thrsleep syz-fuzzer 83746 226941 41345 0 3 0x10008a sigsusp ksh 41345 255989 30594 0 3 0x9a kqread sshd 8707 6843 1 0 3 0x100083 ttyin getty 30594 294874 1 0 3 0x88 kqread sshd 73156 492075 25838 73 3 0x1100090 kqread syslogd 25838 467205 1 0 3 0x100082 netio syslogd 17678 523072 1 0 3 0x100080 kqread resolvd 20975 422148 95997 77 3 0x100092 kqread dhcpleased 71240 5701 95997 77 3 0x100092 kqread dhcpleased 95997 493267 1 0 3 0x80 kqread dhcpleased 24575 45827 0 0 3 0x14200 bored smr 72894 11608 0 0 2 0x14200 zerothread 31341 71977 0 0 3 0x14200 aiodoned aiodoned 87985 138317 0 0 3 0x14200 syncer update 37985 461701 0 0 3 0x14200 cleaner cleaner 41672 321268 0 0 3 0x14200 reaper reaper 32716 228722 0 0 3 0x14200 pgdaemon pagedaemon 49843 196675 0 0 3 0x14200 bored viomb 39830 287046 0 0 3 0x40014200 acpi0 acpi0 75524 204107 0 0 3 0x40014200 idle1 72076 330920 0 0 3 0x14200 bored softnet 59705 160275 0 0 3 0x14200 bored systqmp 79800 522321 0 0 3 0x14200 bored systq 89590 308348 0 0 2 0x40014200 softclock 21837 499291 0 0 3 0x40014200 idle0 1 196738 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 35021 (syz-executor.2) thread 0xffff8000212587e8 (372373) exclusive rwlock amaplk r = 0 (0xfffffd8078b1e438) #0 witness_lock+0x44d #1 uvm_map_lock_entry+0x36 sys/uvm/uvm_map.c:508 #2 uvm_fault_unwire_locked+0x1e8 sys/uvm/uvm_fault.c:1655 #3 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 #4 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd806c094a38) #0 witness_lock+0x44d #1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1600 #2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a19300) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x198 sys/kern/kern_synch.c:437 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1752 #7 uvm_fault_check+0x603 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #7 uvm_fault_check+0x603 sys/uvm/uvm_fault.c:712 #8 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1580 #10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:240 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff829894a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:233 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 94489 (syz-executor.0) thread 0xffff8000240757b0 (280592) exclusive rrwlock inode r = 0 (0xfffffd80665cca30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068b63818) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 6412K 6419K 78643K 11334 0 pcb 13 16K 20K 78643K 19 0 rtable 276 8K 8K 78643K 1594 0 ifaddr 81 17K 17K 78643K 167 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 80 0 ioctlops 0 0K 2K 78643K 93 0 iov 0 0K 24K 78643K 2794 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 3941 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 151 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 277 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 113K 78643K 16896 0 sigio 0 0K 0K 78643K 416 0 proc 56 74K 111K 78643K 1978 0 subproc 104 6K 6K 78643K 260 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1235 0 in_multi 99 6K 7K 78643K 421 0 ether_multi 1 0K 0K 78643K 66 0 mrt 5 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 2955 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 424 93K 109K 78643K 220199 0 UVM aobj 131 4K 4K 78643K 149 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 3913 0 NDP 11 0K 2K 78643K 63 0 temp 125 4711K 4779K 78643K 43802 0 kqueue 13 20K 26K 78643K 1329 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1224 0 1221 20 19 1 3 0 8 0 rtentry 112 320 0 191 4 0 4 4 0 8 0 unpcb 136 11076 0 11063 114 108 6 10 0 8 5 syncache 296 131 0 131 29 28 1 1 0 8 1 tcpqe 32 42 0 42 15 14 1 1 0 8 1 tcpcb 736 18621 0 18544 276 265 11 21 0 8 4 arp 120 46 0 28 1 0 1 1 0 8 0 ipq 40 22 0 22 8 8 0 1 0 8 0 ipqe 40 167 0 167 8 8 0 1 0 8 0 inpcb 312 37485 0 37477 277 268 9 19 0 8 8 rttmr 72 18 0 16 2 1 1 1 0 8 0 ip6q 72 25 0 25 5 5 0 1 0 8 0 ip6af 40 45 0 45 5 5 0 1 0 8 0 nd6 48 128 0 87 1 0 1 1 0 8 0 kcovpl 48 20 0 12 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1793 0 1146 49 8 41 42 0 8 0 art_table 32 1794 0 1146 6 0 6 6 0 8 0 art_node 16 319 0 200 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 275 0 265 1 0 1 1 0 8 0 shmpl 112 146 0 18 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 23150 0 21712 91 0 91 91 0 8 0 ffsino 272 23150 0 21712 97 0 97 97 0 8 0 nchpl 144 46697 0 45073 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 152444 0 152443 2 1 1 2 0 8 0 percpumem 16 52 0 12 1 0 1 1 0 8 0 scxspl 216 135264 0 135264 45 44 1 8 0 8 1 plimitpl 152 3737 0 3715 11 10 1 2 0 8 0 sigapl 424 17156 0 17107 7 0 7 7 0 8 0 futexpl 64 158075 0 158073 3 2 1 1 0 8 0 knotepl 120 1006 0 0 17 0 17 17 0 8 0 kqueuepl 216 4580 0 4571 79 76 3 6 0 8 2 pipepl 336 3023 0 2995 70 67 3 13 0 8 0 fdescpl 496 17141 0 17108 7 2 5 6 0 8 0 filepl 152 128387 0 128153 191 175 16 21 0 8 6 lockfpl 104 2829 0 2826 3 2 1 2 0 8 0 lockfspl 48 643 0 640 1 0 1 1 0 8 0 sessionpl 144 35 0 19 1 0 1 1 0 8 0 pgrppl 48 299 0 283 1 0 1 1 0 8 0 ucredpl 96 17935 0 17917 1 0 1 1 0 8 0 zombiepl 144 17108 0 17107 1 0 1 1 0 8 0 processpl 1064 17156 0 17107 5 1 4 4 0 8 0 procpl 672 50820 0 50758 21 14 7 9 0 8 0 sosppl 168 205 0 205 25 25 0 1 0 8 0 sockpl 480 50179 0 50156 834 817 17 38 0 8 14 mcl64k 65536 61 0 0 4 1 3 3 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 4 1 3 3 0 8 0 mcl4k 4096 33 0 0 4 1 3 3 0 8 0 mcl2k2 2112 16 0 0 2 0 2 2 0 8 0 mcl2k 2048 407 0 0 20 5 15 20 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 4134 0 0 230 0 230 230 0 8 0 bufpl 288 29026 0 22691 453 0 453 453 0 8 0 anonpl 24 4843922 0 4829986 287 181 106 141 0 186 0 amapchunkpl 152 553499 0 552773 200 165 35 48 0 158 1 amappl16 200 44517 0 44136 182 161 21 45 0 8 0 amappl15 192 7071 0 7063 1 0 1 1 0 8 0 amappl14 184 4172 0 4167 1 0 1 1 0 8 0 amappl13 176 3577 0 3573 1 0 1 1 0 8 0 amappl12 168 177 0 170 1 0 1 1 0 8 0 amappl11 160 59 0 46 1 0 1 1 0 8 0 amappl10 152 4583 0 4572 1 0 1 1 0 8 0 amappl9 144 878 0 876 1 0 1 1 0 8 0 amappl8 136 1999 0 1801 7 0 7 7 0 8 0 amappl7 128 565 0 550 1 0 1 1 0 8 0 amappl6 120 656 0 629 2 1 1 2 0 8 0 amappl5 112 18619 0 18598 1 0 1 1 0 8 0 amappl4 104 4814 0 4783 1 0 1 1 0 8 0 amappl3 96 1521 0 1508 1 0 1 1 0 8 0 amappl2 88 5335 0 5286 3 1 2 3 0 8 0 amappl1 80 312848 0 312252 19 4 15 18 0 8 0 amappl 88 218851 0 218605 10 2 8 8 0 92 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 72 148 0 18 3 0 3 3 0 8 0 uaddrrnd 24 17141 0 17108 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 17141 0 17108 1 0 1 1 0 8 0 vmmpekpl 168 135033 0 134973 3 0 3 3 0 8 0 vmmpepl 168 1564428 0 1561827 265 133 132 144 0 357 3 vmsppl 368 17140 0 17108 4 0 4 4 0 8 0 rwobjpl 56 384995 0 377524 131 22 109 111 0 8 0 pdppl 4096 34289 0 34216 392 311 81 89 0 8 8 pvpl 32 7930860 0 7911687 597 395 202 247 0 265 24 pmappl 248 17140 0 17108 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1984 0 931 31 0 31 31 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258f93e) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff826047d1,ffffffff82562dbe,66b,ffffffff8257229d) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd806c094a20,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd806c094a20,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000212587e8,ffff8000211f3748,ffff8000211f37a0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff8000211f3810) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211f3810) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x64640c8750, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a190f8) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a190f8) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff800025ce5480) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800025ce5480) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x63dc2efc60, count: 9 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a190f8) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a190f8) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff800025ce5480) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800025ce5480) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x63dc2efc60, count: -6