panic: kernel diagnostic assertion "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1268 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 200482 96275 0 0x2 0x4000000 1 syz-fuzzer *163527 42061 0 0x14000 0x200 0K reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff824566cc) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff824c41fc,ffffffff82447fad,4f4,ffffffff8247bae8) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e50a00) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1268 uvm_fault_unwire_locked(fffffd806ef34cf8,f1ccd26000,f1ccf25000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1656 uvm_unmap_kill_entry_withlock(fffffd806ef34cf8,fffffd805ffbb808,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd806ef34cf8) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806ef34cf8) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd806ef34cf8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149500) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 6 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 "uvm_page_owner_locked_p(pg)" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1268 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff824566cc) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff824c41fc,ffffffff82447fad,4f4,ffffffff8247bae8) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e50a00) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1268 uvm_fault_unwire_locked(fffffd806ef34cf8,f1ccd26000,f1ccf25000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1656 uvm_unmap_kill_entry_withlock(fffffd806ef34cf8,fffffd805ffbb808,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd806ef34cf8) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806ef34cf8) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd806ef34cf8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149500) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211853b0 rbx 0xffffffff82834bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff800021149500 r8 0x101010101010101 r9 0x8080808080808080 r10 0xda24f19c8a91f3da r11 0x47065835569465a6 r12 0xffffffff82834a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff814f6dd8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211853a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (reaper) pid=163527 stat=onproc flags process=14000 proc=200 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021149260,0xffff800021149cf0 process=0xffff8000ffffdd18 user=0xffff800021180000, vmspace=0xffffffff829d9d80 estcpu=36, cpticks=55, pctcpu=17.83 user=0, sys=328, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7773 402634 96275 0 3 0x82 wait syz-executor.2 73107 210537 96275 0 3 0x82 wait syz-executor.3 75253 398621 96275 0 2 0x482 syz-executor.1 57601 499773 0 0 3 0x14200 acct acct 16627 139508 1 0 3 0x100083 ttyopn getty 15067 437438 0 0 3 0x14200 bored sosplice 96275 185623 89498 0 3 0x82 thrsleep syz-fuzzer 96275 516608 89498 0 2 0x4000482 syz-fuzzer 96275 65894 89498 0 3 0x4000082 thrsleep syz-fuzzer 96275 2427 89498 0 3 0x4000082 thrsleep syz-fuzzer 96275 200482 89498 0 7 0x4000002 syz-fuzzer 96275 335836 89498 0 3 0x4000082 thrsleep syz-fuzzer 96275 36046 89498 0 3 0x4000082 thrsleep syz-fuzzer 96275 152319 89498 0 3 0x4000082 thrsleep syz-fuzzer 89498 154944 65279 0 3 0x10008a sigsusp ksh 65279 114706 61361 0 3 0x9a poll sshd 61361 88204 1 0 3 0x88 poll sshd 11140 3278 61521 74 2 0x100492 pflogd 61521 232918 1 0 3 0x80 netio pflogd 34698 29632 74930 73 2 0x100010 syslogd 74930 509188 1 0 3 0x100082 netio syslogd 60931 187891 1 0 3 0x100080 kqread resolvd 94981 232464 39804 77 3 0x100092 kqread dhcpleased 66520 494386 39804 77 2 0x100492 dhcpleased 39804 847 1 0 3 0x80 kqread dhcpleased 44651 462515 0 0 3 0x14200 bored smr 83872 20946 0 0 2 0x14200 zerothread 46253 168119 0 0 3 0x14200 aiodoned aiodoned 23813 329973 0 0 2 0x14600 update 76633 414884 0 0 3 0x14200 cleaner cleaner *42061 163527 0 0 7 0x14200 reaper 24464 76967 0 0 3 0x14200 pgdaemon pagedaemon 97558 245392 0 0 3 0x14200 bored viomb 67736 47703 0 0 3 0x40014200 acpi0 acpi0 354 91587 0 0 3 0x40014200 idle1 48700 383363 0 0 3 0x14200 bored softnet 1874 79365 0 0 2 0x14200 systqmp 90634 425713 0 0 2 0x14200 systq 78897 171998 0 0 2 0x40014200 softclock 21308 294254 0 0 3 0x40014200 idle0 1 509094 0 0 3 0x80082 wait init 0 0 -1 0 2 0x10200 swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8297de48) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x243 sys/uvm/uvm_fault.c:1655 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #7 reaper+0x18b sys/kern/kern_exit.c:462 #8 proc_trampoline+0x1c Process 34698 (syslogd) thread 0xffff8000ffff7270 (29632) exclusive rrwlock inode r = 0 (0xfffffd806e7b5700) #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 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2923 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 42061 (reaper) thread 0xffff800021149500 (163527) exclusive rwlock uobjlk r = 0 (0xfffffd805fc57408) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 uvm_fault_unwire_locked+0x1e8 sys/uvm/uvm_fault.c:1643 #3 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #4 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #4 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #5 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #6 reaper+0x18b sys/kern/kern_exit.c:462 #7 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82983120) #0 witness_lock+0x44d #1 uvm_unmap_kill_entry_withlock+0x4c sys/uvm/uvm_map.c:2134 #2 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #2 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #3 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #4 reaper+0x18b sys/kern/kern_exit.c:462 #5 proc_trampoline+0x1c exclusive mutex &uvm.pageqlock r = 0 (0xffffffff8297de48) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_fault_unwire_locked+0x243 sys/uvm/uvm_fault.c:1655 #4 uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #7 reaper+0x18b sys/kern/kern_exit.c:462 #8 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10243 6499K 7314K 78643K 36599 0 pcb 13 18K 23K 78643K 2946 0 rtable 166 23K 26K 78643K 4795 0 ifaddr 80 22K 26K 78643K 1674 0 sysctl 3 1K 1K 78643K 5 0 counters 46 34K 35K 78643K 452 0 ioctlops 0 0K 4K 78643K 5125 0 iov 0 0K 16K 78643K 1418 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1425 90K 90K 78643K 11424 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 149 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 24 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 49K 78643K 20649 0 sigio 0 0K 0K 78643K 139 0 proc 72 87K 111K 78643K 3163 0 subproc 39 2K 3K 78643K 962 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1047 0 in_multi 40 2K 3K 78643K 2085 0 ether_multi 1 0K 0K 78643K 287 0 mrt 1 0K 0K 78643K 57 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 427 1897K 1897K 78643K 427 0 exec 0 0K 2K 78643K 4212 0 pfkey data 0 0K 0K 78643K 7 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 628 1530K 1530K 78643K 264155 0 UVM aobj 131 9K 9K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1380 0 NDP 8 0K 1K 78643K 444 0 temp 110 4225K 8322K 78643K 155022 0 kqueue 10 14K 22K 78643K 766 0 SYN cache 2 8K 16K 78643K 3 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 1161 0 1158 18 17 1 3 0 8 0 rtentry 112 1224 0 1178 4 1 3 3 0 8 0 unpcb 128 53895 0 53880 174 173 1 9 0 8 0 syncache 296 63 0 63 21 21 0 1 0 8 0 tcpqe 32 14 27 14 5 5 0 1 0 8 0 tcpcb 736 7721 0 7713 237 234 3 19 0 8 1 arp 120 170 0 162 1 0 1 1 0 8 0 inpcb 304 35509 0 35498 239 236 3 19 0 8 2 rttmr 72 17 0 17 5 5 0 1 0 8 0 nd6 48 382 0 374 1 0 1 1 0 8 0 pkpcb 40 214 0 214 13 13 0 1 0 8 0 kcovpl 48 74 0 71 1 0 1 1 0 8 0 ppxss 1248 58 0 58 14 14 0 1 0 8 0 pfstscr 40 28 0 28 6 6 0 1 0 8 0 pffrag 232 110 0 108 10 9 1 1 0 482 0 pffrnode 88 110 0 108 10 9 1 1 0 8 0 pffrent 40 1308 0 1306 10 9 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 459 0 438 6 4 2 3 0 8 0 pftag 88 27 0 24 3 2 1 1 0 8 0 pfstitem 24 25 0 23 1 0 1 1 0 8 0 pfstkey 112 67 0 65 1 0 1 1 0 8 0 pfstate 320 45 0 43 1 0 1 1 0 8 0 pfsrctr 152 33 0 33 1 1 0 1 0 8 0 pfrule 1360 1055 0 957 12 3 9 9 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 5226 0 5015 48 31 17 20 0 8 0 art_table 32 5228 0 5016 4 1 3 3 0 8 0 art_node 16 1222 0 1183 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 18 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 28316 0 26833 94 0 94 94 0 8 0 ffsino 272 28316 0 26833 100 0 100 100 0 8 0 nchpl 144 54706 0 53118 61 0 61 61 0 8 0 uvmvnodes 80 6344 0 0 130 0 130 130 0 8 0 vnodes 224 6344 0 0 374 0 374 374 0 8 0 namei 1024 182346 0 182346 4 3 1 1 0 8 1 percpumem 16 238 0 203 1 0 1 1 0 8 0 vcpupl 2048 359 0 0 45 0 45 45 0 8 0 vmpool 560 388 0 29 26 0 26 26 0 8 0 pfiaddrpl 120 184 0 161 1 0 1 1 0 8 0 scxspl 216 173066 0 173066 42 41 1 8 0 8 1 plimitpl 152 2237 0 2226 1 0 1 1 0 8 0 sigapl 424 20731 0 20697 9 3 6 7 0 8 0 futexpl 64 181867 0 181867 6 5 1 1 0 8 1 knotepl 112 265 0 0 4 0 4 4 0 8 0 kqueuepl 216 3996 0 3987 84 83 1 8 0 8 0 pipepl 336 4128 0 4115 115 113 2 12 0 8 0 fdescpl 496 20673 0 20655 5 2 3 4 0 8 0 filepl 152 179304 0 179173 286 278 8 23 0 8 2 lockfpl 104 4860 0 4858 8 7 1 2 0 8 0 lockfspl 48 1328 0 1326 1 0 1 1 0 8 0 sessionpl 144 91 0 78 1 0 1 1 0 8 0 pgrppl 48 289 0 276 1 0 1 1 0 8 0 ucredpl 96 16650 0 16637 1 0 1 1 0 8 0 zombiepl 144 20697 0 20693 1 0 1 1 0 8 0 processpl 1064 20731 0 20693 4 1 3 4 0 8 0 procpl 672 62177 0 62121 34 29 5 8 0 8 0 srpgc 96 98 0 98 13 13 0 1 0 8 0 sosppl 168 142 0 140 21 20 1 1 0 8 0 sockpl 480 90896 0 90867 2141 2135 6 53 0 8 2 mcl64k 65536 66 0 0 3 1 2 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 43 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 36 0 0 4 1 3 3 0 8 0 mcl4k 4096 59 0 0 4 2 2 3 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 367 0 0 24 5 19 21 0 8 0 mtagpl 96 967 0 0 9 1 8 8 0 8 0 mbufpl 256 2400 0 0 116 1 115 116 0 8 0 bufpl 288 37365 0 31020 454 0 454 454 0 8 0 anonpl 24 5927106 0 5903101 475 313 162 188 0 186 0 amapchunkpl 152 645206 0 644055 164 118 46 62 0 158 0 amappl16 200 52186 0 51423 202 161 41 54 0 8 0 amappl15 192 4278 0 4278 2 2 0 1 0 8 0 amappl14 184 3421 0 3419 1 0 1 1 0 8 0 amappl13 176 3143 0 3141 1 0 1 1 0 8 0 amappl12 168 1410 0 1405 1 0 1 1 0 8 0 amappl11 160 2626 0 2611 1 0 1 1 0 8 0 amappl10 152 3517 0 3508 1 0 1 1 0 8 0 amappl9 144 3327 0 3318 1 0 1 1 0 8 0 amappl8 136 2357 0 2246 4 0 4 4 0 8 0 amappl7 128 787 0 776 1 0 1 1 0 8 0 amappl6 120 3433 0 3404 1 0 1 1 0 8 0 amappl5 112 18831 0 18810 1 0 1 1 0 8 0 amappl4 104 7881 0 7852 1 0 1 1 0 8 0 amappl3 96 4125 0 4107 1 0 1 1 0 8 0 amappl2 88 5140 0 5060 2 0 2 2 0 8 0 amappl1 80 379121 0 378603 14 3 11 13 0 8 0 amappl 88 262079 0 261735 9 1 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 21061 0 20681 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 21061 0 20681 3 0 3 3 0 8 0 vmmpekpl 168 147953 0 147882 5 1 4 4 0 8 0 vmmpepl 168 1899909 0 1896729 494 354 140 166 0 357 0 vmsppl 368 21060 0 20680 35 0 35 35 0 8 0 rwobjpl 56 460668 0 452329 157 39 118 121 0 8 0 pdppl 4096 42130 0 41719 509 97 412 415 0 8 1 pvpl 32 9995872 0 9974824 812 559 253 306 0 265 45 pmappl 248 21060 0 20680 24 0 24 24 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1816 0 495 39 0 39 39 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(ffffffff824566cc) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff824c41fc,ffffffff82447fad,4f4,ffffffff8247bae8) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pageunwire(fffffd8007e50a00) at uvm_pageunwire+0x19b sys/uvm/uvm_page.c:1268 uvm_fault_unwire_locked(fffffd806ef34cf8,f1ccd26000,f1ccf25000) at uvm_fault_unwire_locked+0x24b sys/uvm/uvm_fault.c:1656 uvm_unmap_kill_entry_withlock(fffffd806ef34cf8,fffffd805ffbb808,0) at uvm_unmap_kill_entry_withlock+0x67 sys/uvm/uvm_map.c:2136 uvm_map_teardown(fffffd806ef34cf8) at uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] uvm_map_teardown(fffffd806ef34cf8) at uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 uvmspace_free(fffffd806ef34cf8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149500) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) 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(ffffffff82982f18) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82982f18) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002124a4f0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002124a4f0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x20acf9e80, count: 9 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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(ffffffff82982f18) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82982f18) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002124a4f0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002124a4f0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x20acf9e80, count: -6