panic: mtx 0xffffffff838dea98: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 62331 22738 0 0x100002 0 1 ndp * 52333 37654 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83334dfa) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dea98) at mtx_enter_try+0x1da mtx_enter(ffffffff838dea98) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd80087d0600) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087d0600) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087d0600) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805fcbfcb0,0,ffff80003c45f9c8,ffff80003c45f9ac,0,2,2109099d72e17965,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45fbe0,ffff80003c45fc18,ffff80003c45fa60,ffff80003c45fa48) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c45fbe0,ffff80003c45fc18,ffff80003c45fb60) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b940400,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45fd70,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c45fd70) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7747bef27290, count: 2 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: mtx 0xffffffff838dea98: locking against myself ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83334dfa) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dea98) at mtx_enter_try+0x1da mtx_enter(ffffffff838dea98) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd80087d0600) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087d0600) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087d0600) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805fcbfcb0,0,ffff80003c45f9c8,ffff80003c45f9ac,0,2,2109099d72e17965,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45fbe0,ffff80003c45fc18,ffff80003c45fa60,ffff80003c45fa48) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c45fbe0,ffff80003c45fc18,ffff80003c45fb60) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b940400,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45fd70,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c45fd70) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7747bef27290, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c45f700 rbx 0xffffffff837a4ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80003c459250 rax 0xffffffff837a3ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc029bb288626dbab r11 0x59b31056bf1cce12 r12 0xffffffff837a4be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff81fa2605 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c45f6f0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=52333 pid=37654 tcnt=4 stat=onproc flags process=10 proc=0 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a36ea80,0xffff80003c458800 process=0xffff80003c47a730 user=0xffff80003c45a000, vmspace=0xfffffd806b940400 estcpu=30, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 1211 226776 43987 32767 2 0x10 syz-executor 75962 29827 79024 32767 2 0x10 syz-executor 22738 62331 21817 0 7 0x100002 ndp 21817 130593 23570 0 3 0x10008a sigsusp sh *37654 52333 24109 32767 7 0x10 syz-executor 37654 393428 24109 32767 3 0x4000090 fsleep syz-executor 37654 443904 24109 32767 3 0x4000010 biowait syz-executor 37654 302875 24109 32767 3 0x4000010 uobjlk syz-executor 66094 423777 56385 32767 2 0x10 syz-executor 66094 479673 56385 32767 3 0x4000090 lockf syz-executor 53571 197358 75351 0 2 0x100000 sh 75351 44417 94705 0 3 0x10008a sigsusp sh 54762 212671 66336 32767 2 0x10 syz-executor 54762 38380 66336 32767 3 0x4000090 fsleep syz-executor 23570 12732 75834 0 3 0x80 wait syz-executor 24109 123893 14074 32767 3 0x90 nanoslp syz-executor 94705 368742 78790 0 3 0x80 wait syz-executor 43987 396768 84373 32767 3 0x90 nanoslp syz-executor 73628 375413 81387 0 2 0 syz-executor 56385 517350 59049 32767 3 0x90 nanoslp syz-executor 66336 422501 60142 32767 3 0x90 nanoslp syz-executor 79024 323375 17472 32767 3 0x90 nanoslp syz-executor 81387 248431 84214 0 3 0x82 wait syz-executor 14074 470176 84214 0 3 0x82 wait syz-executor 78790 176445 84214 0 3 0x82 wait syz-executor 75834 41562 84214 0 3 0x82 wait syz-executor 84373 391862 84214 0 3 0x82 wait syz-executor 59049 475495 84214 0 3 0x82 wait syz-executor 60142 475371 84214 0 3 0x82 wait syz-executor 17472 13694 84214 0 3 0x82 wait syz-executor 84214 402460 15895 0 3 0x82 kqread syz-executor 15895 8417 10426 0 3 0x10008a sigsusp ksh 10426 501671 87533 0 3 0x98 kqread sshd-session 87533 380007 78470 0 3 0x92 kqread sshd-session 76282 129624 1 0 3 0x100083 ttyin getty 78470 294155 1 0 3 0x88 kqread sshd 14777 125876 58450 73 3 0x1100090 kqread syslogd 58450 439368 1 0 3 0x100082 sbwait syslogd 26993 254775 1 0 3 0x100080 kqread resolvd 44631 522101 63502 77 3 0x100092 kqread dhcpleased 28862 177489 63502 77 3 0x100092 kqread dhcpleased 63502 395298 1 0 3 0x80 kqread dhcpleased 49350 492205 0 0 2 0x40014200 smr 69901 364569 0 0 2 0x14200 zerothread 43758 372417 0 0 3 0x14200 aiodoned aiodoned 588 269253 0 0 3 0x14200 syncer update 10750 302502 0 0 3 0x14200 cleaner cleaner 45903 50901 0 0 3 0x14200 reaper reaper 70116 178416 0 0 3 0x14200 pgdaemon pagedaemon 22395 386269 0 0 3 0x14200 bored viomb 58046 270260 0 0 3 0x40014200 acpi0 acpi0 85199 502927 0 0 3 0x40014200 idle1 55049 107582 0 0 3 0x14200 bored softnet7 20656 171544 0 0 3 0x14200 bored softnet6 94439 413075 0 0 3 0x14200 bored softnet5 67624 328591 0 0 3 0x14200 bored softnet4 81452 305376 0 0 3 0x14200 bored softnet3 80023 410669 0 0 3 0x14200 bored softnet2 5568 119208 0 0 3 0x14200 bored softnet1 49636 93935 0 0 3 0x14200 bored softnet0 48001 396103 0 0 3 0x14200 smrbar systqmp 1918 313149 0 0 3 0x14200 bored systq 62095 289550 0 0 3 0x14200 tmoslp softclockmp 27034 51306 0 0 3 0x40014200 tmoslp softclock 47557 150943 0 0 3 0x40014200 idle0 1 223142 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838deaa8) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvn_get+0x674 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 37654 (syz-executor) thread 0xffff80003c459250 (52333) exclusive rwlock uobjlk r = 0 (0xfffffd80667817d0) #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 uvn_io+0x667 sys/uvm/uvm_vnode.c:1298 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff838deaa8) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvn_get+0x674 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 37654 (syz-executor) thread 0xffff80003c458558 (443904) exclusive rrwlock inode r = 0 (0xfffffd807233e450) #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 sys_ftruncate+0x1c1 sys/kern/vfs_syscalls.c:2916 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 48001 (systqmp) thread 0xffff8000ffffe530 (396103) shared rwlock systqmp r = 0 (0xffffffff837791e8) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10186 10955K 10968K 166960K 11264 0 pcb 17 12K 12K 166960K 17 0 rtable 193 5K 5K 166960K 245 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1350 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 27 101K 125K 166960K 139 0 proc 58 99K 147K 166960K 466 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 339 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 233 171K 178K 166960K 2700 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 49 98K 116K 166960K 1149 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 25 1K 1K 166960K 25 0 temp 34 8638K 8700K 166960K 3647 0 kqueue 14 22K 22K 166960K 22 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 34 0 30 1 0 1 1 0 8 0 rtentry 176 89 0 1 4 0 4 4 0 8 0 unpcb 144 31 0 16 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 7 0 2 1 0 1 1 0 8 0 arp 128 10 0 0 1 0 1 1 0 8 0 inpcb 328 54 0 46 1 0 1 1 0 8 0 nd6 144 14 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 398 0 0 25 0 25 25 0 8 0 art_table 40 399 0 0 5 0 5 5 0 8 0 art_node 32 89 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1541 0 40 94 0 94 94 0 8 0 ffsino 296 1541 0 40 116 0 116 116 0 8 0 nchpl 144 1720 0 45 63 0 63 63 0 8 0 uvmvnodes 80 1622 0 0 34 0 34 34 0 8 0 vnodes 216 1622 0 0 91 0 91 91 0 8 0 namei 1024 4997 0 4997 2 0 2 2 0 8 2 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 6229 0 6227 3 1 2 2 1 8 1 plimitpl 152 34 0 10 1 0 1 1 0 8 0 sigapl 424 422 0 361 8 0 8 8 0 8 0 knotepl 120 55 0 0 2 0 2 2 0 8 0 kqueuepl 224 18 0 8 1 0 1 1 0 8 0 pipepl 344 98 0 71 3 0 3 3 0 8 0 fdescpl 528 400 0 361 4 0 4 4 0 8 0 filepl 160 1263 0 1055 9 0 9 9 0 8 0 lockfpl 104 9 0 4 1 0 1 1 0 8 0 lockfspl 48 6 0 2 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 29 0 5 1 0 1 1 0 8 0 ucredpl 104 79 0 63 1 0 1 1 0 8 0 zombiepl 144 361 0 361 1 0 1 1 0 8 1 processpl 1248 422 0 361 7 1 6 6 0 8 0 procpl 664 427 0 361 6 0 6 6 0 8 0 sockpl 752 119 0 92 3 0 3 3 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 mcl2k 2048 14 0 0 2 0 2 2 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 134 0 0 9 0 9 9 0 8 0 bufpl 280 2799 0 116 192 0 192 192 0 8 0 anonpl 32 5156 0 0 42 0 42 42 0 246 0 amapchunkpl 152 7463 0 6873 27 4 23 23 0 158 0 amappl16 200 760 0 752 4 0 4 4 0 8 3 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 101 0 90 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 0 1 1 0 8 1 amappl12 168 994 0 958 2 0 2 2 0 8 0 amappl11 160 41 0 31 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 0 1 1 0 8 1 amappl9 144 259 0 259 1 0 1 1 0 8 1 amappl8 136 16 0 15 1 0 1 1 0 8 0 amappl7 128 92 0 81 1 0 1 1 0 8 0 amappl6 120 163 0 158 1 0 1 1 0 8 0 amappl5 112 118 0 112 1 0 1 1 0 8 0 amappl4 104 259 0 244 1 0 1 1 0 8 0 amappl3 96 1147 0 1040 3 0 3 3 0 8 0 amappl2 88 591 0 535 2 0 2 2 0 8 0 amappl1 80 7861 0 7267 15 0 15 15 0 8 2 amappl 88 2082 0 1920 4 0 4 4 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 401 0 362 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 401 0 362 1 0 1 1 0 8 0 vmmpekpl 168 4704 0 4671 2 0 2 2 0 8 0 vmmpepl 168 30919 0 28855 95 0 95 95 0 357 4 vmsppl 488 400 0 362 7 1 6 6 0 8 0 rwobjpl 80 12249 0 9778 53 0 53 53 0 8 1 pdppl 4096 810 0 724 112 14 98 98 0 8 12 pvpl 32 10805 0 0 90 1 89 89 0 265 1 pmappl 256 400 0 362 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 275 0 17 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83334dfa) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff838dea98) at mtx_enter_try+0x1da mtx_enter(ffffffff838dea98) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd80087d0600) at uvm_pageclean+0x28e uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd80087d0600) at uvm_pageclean+0x28e sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd80087d0600) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd805fcbfcb0,0,ffff80003c45f9c8,ffff80003c45f9ac,0,2,2109099d72e17965,2) at uvn_get+0x686 sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c45fbe0,ffff80003c45fc18,ffff80003c45fa60,ffff80003c45fa48) at uvm_fault_lower_io+0x2cd sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c45fbe0,ffff80003c45fc18,ffff80003c45fb60) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806b940400,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c45fd70,200000000000) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c45fd70) at usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7747bef27290, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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(ffffffff83952408) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83952408) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c465190) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c465190) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7acb08dd9d60, count: 9 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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(ffffffff83952408) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83952408) at __mp_lock+0x192 sys/kern/kern_lock.c:165 syscall(ffff80003c465190) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c465190) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7acb08dd9d60, count: -6