panic: mtx 0xffffffff83a242c0: locking against myself Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *334214 52082 32767 0x10 0 1 syz-executor 121496 52082 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833fa721) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a242c0) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83a242c0) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008656a00) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8062a46bf0,0,ffff80003c043008,ffff80003c042fec,0,2,ef130109e810ff55,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c043220,ffff80003c043258,ffff80003c0430a0,ffff80003c043088) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c043220,ffff80003c043258,ffff80003c0431a0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a623400,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c0433b0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c0433b0) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6f85758f6840, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: mtx 0xffffffff83a242c0: locking against myself ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833fa721) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a242c0) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83a242c0) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008656a00) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8062a46bf0,0,ffff80003c043008,ffff80003c042fec,0,2,ef130109e810ff55,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c043220,ffff80003c043258,ffff80003c0430a0,ffff80003c043088) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c043220,ffff80003c043258,ffff80003c0431a0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a623400,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c0433b0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c0433b0) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6f85758f6840, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c042d40 rbx 0xffff8000299deddf rdx 0 rcx 0xffff80003c46b740 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x37205e8c1f707cd4 r11 0x8e8270c4473cf99b r12 0xffff8000299debe0 r13 0 r14 0 r15 0x1 rip 0xffffffff82bab0d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c042d30 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=334214 pid=52082 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=0xffff80003c46a550,0xffff80003c46afa0 process=0xffff80003c46c9f0 user=0xffff80003c03e000, vmspace=0xfffffd806a623400 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18440 305988 94924 32767 2 0x10 syz-executor *52082 334214 51144 32767 7 0x10 syz-executor 52082 465890 51144 32767 3 0x4000090 fsleep syz-executor 52082 415085 51144 32767 3 0x4000010 biowait syz-executor 52082 121496 51144 32767 7 0x4000010 syz-executor 34008 455185 94036 32767 2 0x10 syz-executor 34008 134919 94036 32767 3 0x4000090 ttyout syz-executor 6111 178827 81145 32767 2 0x10 syz-executor 89391 354365 26105 32767 2 0x10 syz-executor 89391 354665 26105 32767 3 0x4000090 fsleep syz-executor 89391 238330 26105 32767 3 0x4000090 fsleep syz-executor 1759 14444 43678 32767 2 0x10 syz-executor 1759 323722 43678 32767 3 0x4000090 ttyin syz-executor 1759 251831 43678 32767 3 0x4000090 fsleep syz-executor 83942 85909 29012 32767 2 0x10 syz-executor 83942 35475 29012 32767 3 0x4000090 sbwait syz-executor 83942 154054 29012 32767 3 0x4000090 fsleep syz-executor 92456 277730 81981 32767 2 0x10 syz-executor 92456 419358 81981 32767 3 0x4000090 sbwait syz-executor 92456 372399 81981 32767 3 0x4000090 fsleep syz-executor 19401 60432 0 0 3 0x14200 bored sosplice 26105 270681 41968 32767 2 0x10 syz-executor 81145 441836 4911 32767 3 0x90 nanoslp syz-executor 81981 256973 38672 32767 2 0x10 syz-executor 43678 518072 75149 32767 2 0x10 syz-executor 94036 171599 37583 32767 3 0x90 nanoslp syz-executor 29012 364716 57172 32767 3 0x90 nanoslp syz-executor 51144 281927 3147 32767 3 0x90 nanoslp syz-executor 94924 455620 1961 32767 3 0x90 nanoslp syz-executor 38672 19407 1638 0 3 0x82 wait syz-executor 4911 360182 1638 0 3 0x82 wait syz-executor 75149 131388 1638 0 3 0x82 wait syz-executor 41968 451512 1638 0 3 0x82 wait syz-executor 37583 125461 1638 0 3 0x82 wait syz-executor 57172 272979 1638 0 3 0x82 wait syz-executor 3147 319439 1638 0 3 0x82 wait syz-executor 1961 200283 1638 0 3 0x82 wait syz-executor 1638 474281 91666 0 3 0x82 kqread syz-executor 91666 465872 95608 0 3 0x10008a sigsusp ksh 95608 389015 25288 0 3 0x98 kqread sshd-session 25288 15540 35720 0 3 0x92 kqread sshd-session 87747 401559 1 0 3 0x100083 ttyin getty 35720 447397 1 0 3 0x88 kqread sshd 31053 249618 3707 73 3 0x1100090 kqread syslogd 3707 167537 1 0 3 0x100082 sbwait syslogd 50353 141284 1 0 3 0x100080 kqread resolvd 92379 184041 69751 77 3 0x100092 kqread dhcpleased 90844 230445 69751 77 3 0x100092 kqread dhcpleased 69751 272280 1 0 3 0x80 kqread dhcpleased 4367 271875 0 0 3 0x14200 bored smr 94192 62135 0 0 2 0x14200 zerothread 37373 214147 0 0 3 0x14200 aiodoned aiodoned 96170 225669 0 0 3 0x14200 syncer update 33177 465973 0 0 3 0x14200 cleaner cleaner 9473 151975 0 0 3 0x14200 reaper reaper 82779 231036 0 0 3 0x14200 pgdaemon pagedaemon 32266 127163 0 0 3 0x14200 bored viomb 57273 438784 0 0 3 0x40014200 acpi0 acpi0 68294 183898 0 0 3 0x40014200 idle1 86447 212208 0 0 3 0x14200 bored softnet7 50493 379898 0 0 3 0x14200 bored softnet6 38966 298006 0 0 3 0x14200 bored softnet5 7331 266239 0 0 3 0x14200 bored softnet4 49923 424490 0 0 3 0x14200 bored softnet3 25252 326382 0 0 3 0x14200 bored softnet2 67721 314119 0 0 3 0x14200 bored softnet1 62299 386090 0 0 3 0x14200 bored softnet0 80292 118767 0 0 3 0x14200 bored systqmp 82643 140225 0 0 3 0x14200 bored systq 80679 160617 0 0 3 0x14200 tmoslp softclockmp 40670 145126 0 0 3 0x40014200 tmoslp softclock 14773 492522 0 0 3 0x40014200 idle0 1 312732 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83a242d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 52082 (syz-executor) thread 0xffff80003c46b740 (334214) exclusive rwlock uobjlk r = 0 (0xfffffd8062141f18) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 uvn_io+0x667 sys/uvm/uvm_vnode.c:1297 #3 uvn_get+0x31d sys/uvm/uvm_vnode.c:1102 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 exclusive mutex &uvm.pageqlock r = 0 (0xffffffff83a242d0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb 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+0x679 sys/uvm/uvm_vnode.c:1117 #4 uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 #5 uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 #6 uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 #7 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #8 usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 #9 recall_trap+0x8 Process 52082 (syz-executor) thread 0xffff80003c46bc60 (415085) exclusive rrwlock inode r = 0 (0xfffffd806b2da200) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_ftruncate+0x1c4 sys/kern/vfs_syscalls.c:2912 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 92456 (syz-executor) thread 0xffff80002a2d47d0 (419358) exclusive rwlock sbufrcv r = 0 (0xffff8000014d6ce0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 sblock+0xb7 sys/kern/uipc_socket2.c:536 #3 soreceive+0x28e sys/kern/uipc_socket.c:867 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10194 10956K 10968K 166960K 11272 0 pcb 17 12K 12K 166960K 17 0 rtable 213 6K 6K 166960K 278 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 33 0 iov 1 4K 12K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1369 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 16 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 121K 166960K 320 0 sigio 0 0K 0K 166960K 3 0 proc 58 99K 131K 166960K 518 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 34 0 in_multi 99 7K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 3 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 364 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 268 185K 197K 166960K 4518 0 UVM aobj 13 2K 2K 166960K 15 0 pinsyscall 47 94K 108K 166960K 1347 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 11 0K 2K 166960K 27 0 temp 37 8674K 8740K 166960K 4591 0 kqueue 14 22K 28K 166960K 55 0 SYN cache 2 16K 16K 166960K 2 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 86 0 83 2 0 2 2 0 8 1 rtentry 176 101 0 3 5 0 5 5 0 8 0 unpcb 144 209 0 190 4 0 4 4 0 8 3 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 146 0 142 7 0 7 7 0 8 6 arp 128 11 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 372 0 362 7 0 7 7 0 8 6 ip6q 72 4 0 3 1 0 1 1 0 8 0 ip6af 40 7 0 6 1 0 1 1 0 8 0 nd6 144 21 0 2 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 256 450 0 7 29 0 29 29 0 8 0 art_table 40 451 0 7 5 0 5 5 0 8 0 art_node 32 101 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 26 0 9 3 0 3 3 0 8 0 dino2pl 256 1824 0 318 95 0 95 95 0 8 0 ffsino 296 1824 0 318 117 0 117 117 0 8 0 nchpl 144 2258 0 583 63 0 63 63 0 8 0 uvmvnodes 80 1905 0 0 39 0 39 39 0 8 0 vnodes 216 1905 0 0 106 0 106 106 0 8 0 namei 1024 7064 0 7064 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 8904 0 8902 9 1 8 8 1 8 7 plimitpl 152 162 0 137 2 0 2 2 0 8 0 sigapl 424 604 0 543 8 0 8 8 0 8 0 knotepl 120 640 0 0 20 0 20 20 0 8 0 kqueuepl 224 131 0 121 5 0 5 5 0 8 4 pipepl 344 115 0 87 3 0 3 3 0 8 0 fdescpl 528 581 0 543 3 0 3 3 0 8 0 filepl 160 2726 0 2503 13 0 13 13 0 8 3 lockfpl 104 48 0 44 1 0 1 1 0 8 0 lockfspl 48 22 0 18 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 32 0 8 1 0 1 1 0 8 0 ucredpl 104 343 0 324 1 0 1 1 0 8 0 zombiepl 144 543 0 543 1 0 1 1 0 8 1 processpl 1248 604 0 543 7 1 6 6 0 8 0 procpl 656 915 0 842 7 0 7 7 0 8 0 sosppl 168 5 0 5 1 0 1 1 0 8 1 sockpl 752 670 0 638 10 0 10 10 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 1 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 265 0 0 17 0 17 17 0 8 0 bufpl 280 3357 0 116 232 0 232 232 0 8 0 anonpl 32 7478 0 0 61 0 61 61 0 246 0 amapchunkpl 152 14087 0 13504 34 2 32 32 0 158 4 amappl16 200 2269 0 2226 17 7 10 15 0 8 7 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 110 0 100 1 0 1 1 0 8 0 amappl13 176 42 0 42 1 1 0 1 0 8 0 amappl12 168 1185 0 1148 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 35 0 35 1 1 0 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 129 0 119 1 0 1 1 0 8 0 amappl6 120 193 0 190 1 0 1 1 0 8 0 amappl5 112 117 0 109 1 0 1 1 0 8 0 amappl4 104 287 0 272 1 0 1 1 0 8 0 amappl3 96 2431 0 2295 4 0 4 4 0 8 0 amappl2 88 638 0 583 2 0 2 2 0 8 0 amappl1 80 9081 0 8513 14 0 14 14 0 8 0 amappl 88 3845 0 3646 5 0 5 5 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 581 0 543 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 581 0 543 1 0 1 1 0 8 0 vmmpekpl 168 6294 0 6266 2 0 2 2 0 8 0 vmmpepl 168 43947 0 41776 104 0 104 104 0 357 9 vmsppl 488 580 0 543 7 1 6 6 0 8 0 rwobjpl 80 16586 0 13800 60 1 59 59 0 8 1 pdppl 4096 1169 0 1086 109 26 83 95 0 8 0 pvpl 32 17411 0 0 143 2 141 141 0 265 0 pmappl 256 580 0 543 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 292 0 29 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8387dff0) 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(ffffffff83a1e690) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a1e690) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4a3a70,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0xa91119fac90, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8387dff0) 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(ffffffff83a1e690) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff83a1e690) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4a3a70,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0xa91119fac90, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833fa721) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a242c0) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83a242c0) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008656a00) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8062a46bf0,0,ffff80003c043008,ffff80003c042fec,0,2,ef130109e810ff55,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c043220,ffff80003c043258,ffff80003c0430a0,ffff80003c043088) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c043220,ffff80003c043258,ffff80003c0431a0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a623400,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c0433b0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c0433b0) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6f85758f6840, count: 2 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833fa721) at panic+0x1e5 sys/kern/subr_prf.c:198 mtx_enter_try(ffffffff83a242c0) at mtx_enter_try+0x1da sys/kern/kern_lock.c:300 mtx_enter(ffffffff83a242c0) at mtx_enter+0x62 sys/kern/kern_lock.c:261 uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 uvm_pagedequeue sys/uvm/uvm_page.c:-1 [inline] uvm_pageclean(fffffd8008656a00) at uvm_pageclean+0x290 sys/uvm/uvm_page.c:980 uvm_pagefree(fffffd8008656a00) at uvm_pagefree+0x26 sys/uvm/uvm_page.c:1020 uvn_get(fffffd8062a46bf0,0,ffff80003c043008,ffff80003c042fec,0,2,ef130109e810ff55,2) at uvn_get+0x68b sys/uvm/uvm_vnode.c:1118 uvm_fault_lower_io(ffff80003c043220,ffff80003c043258,ffff80003c0430a0,ffff80003c043088) at uvm_fault_lower_io+0x2d1 sys/uvm/uvm_fault.c:1652 uvm_fault_lower(ffff80003c043220,ffff80003c043258,ffff80003c0431a0) at uvm_fault_lower+0x2bb sys/uvm/uvm_fault.c:1419 uvm_fault(fffffd806a623400,200000000000,0,2) at uvm_fault+0x278 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c0433b0,2000000000c0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c0433b0) at usertrap+0x403 sys/arch/amd64/amd64/trap.c:605 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x6f85758f6840, count: -13