panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 193518 31348 0 0x2 0x4000000 0 syz-fuzzer *395420 75607 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823f6d33) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828f7158,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db34e0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db34e0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 sys/kern/subr_pool.c:2025 pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559 taskq_thread(ffffffff826d8dd0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: 5 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 acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823f6d33) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828f7158,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db34e0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db34e0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 sys/kern/subr_pool.c:2025 pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559 taskq_thread(ffffffff826d8dd0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020db3250 rbx 0xffff800020db3300 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff812f44df kprintf+0x16f r9 0x1 r10 0x2 r11 0x2858cb17e5a14761 r12 0x3000000008 r13 0xffff800020db3260 r14 0x100 r15 0x1 rip 0xffffffff81db78a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020db3240 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=395420 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d98c30,0xffff800020d98280 process=0xffff800020d9a000 user=0xffff800020dae000, vmspace=0xffffffff8289e700 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97195 488769 76550 0 2 0 syz-executor.0 97195 443675 76550 0 2 0x4000000 syz-executor.0 96821 399892 1 0 3 0x100083 ttyin getty 55587 104374 0 0 3 0x14280 nfsidl nfsio 37469 97118 0 0 3 0x14280 nfsidl nfsio 29284 38220 0 0 3 0x14280 nfsidl nfsio 47400 135727 0 0 3 0x14280 nfsidl nfsio 67231 517232 0 0 3 0x14280 nfsidl nfsio 91245 263600 0 0 3 0x14280 nfsidl nfsio 77772 467033 0 0 3 0x14280 nfsidl nfsio 43166 163881 0 0 3 0x14280 nfsidl nfsio 20074 510667 0 0 3 0x14280 nfsidl nfsio 77217 222601 0 0 3 0x14280 nfsidl nfsio 11093 499087 0 0 3 0x14280 nfsidl nfsio 34016 354355 0 0 3 0x14280 nfsidl nfsio 39654 405609 0 0 3 0x14280 nfsidl nfsio 56218 38075 0 0 3 0x14280 nfsidl nfsio 99789 362246 0 0 3 0x14280 nfsidl nfsio 23805 17767 0 0 3 0x14280 nfsidl nfsio 87645 354711 0 0 3 0x14280 nfsidl nfsio 10260 451782 0 0 3 0x14280 nfsidl nfsio 7212 321431 0 0 3 0x14280 nfsidl nfsio 45459 278889 0 0 3 0x14280 nfsidl nfsio 95166 267684 0 0 3 0x14200 bored sosplice 55643 391579 31348 0 3 0x82 piperd syz-executor.1 76550 456944 31348 0 3 0x82 nanosleep syz-executor.0 31348 333185 2289 0 3 0x82 thrsleep syz-fuzzer 31348 286027 2289 0 3 0x4000082 nanosleep syz-fuzzer 31348 59930 2289 0 3 0x4000082 thrsleep syz-fuzzer 31348 131649 2289 0 3 0x4000082 thrsleep syz-fuzzer 31348 382964 2289 0 3 0x4000082 thrsleep syz-fuzzer 31348 481473 2289 0 3 0x4000082 thrsleep syz-fuzzer 31348 193518 2289 0 7 0x4000002 syz-fuzzer 31348 264445 2289 0 3 0x4000082 thrsleep syz-fuzzer 31348 267638 2289 0 3 0x4000082 kqread syz-fuzzer 31348 369853 2289 0 3 0x4000082 thrsleep syz-fuzzer 31348 479741 2289 0 3 0x4000082 thrsleep syz-fuzzer 2289 57380 68285 0 3 0x10008a pause ksh 68285 147619 9822 0 3 0x92 select sshd 9822 4467 1 0 3 0x80 select sshd 49832 303691 31103 74 3 0x100092 bpf pflogd 31103 13248 1 0 3 0x80 netio pflogd 89373 482742 82908 73 3 0x100090 kqread syslogd 82908 156932 1 0 3 0x100082 netio syslogd 53013 26502 1 77 3 0x100090 poll dhclient 70862 172507 1 0 3 0x80 poll dhclient 63836 454952 0 0 3 0x14200 bored smr 10552 276306 0 0 2 0x14200 zerothread 34854 419995 0 0 3 0x14200 aiodoned aiodoned 47158 485570 0 0 3 0x14200 syncer update 49245 488752 0 0 3 0x14200 cleaner cleaner 78745 280099 0 0 3 0x14200 reaper reaper 13323 498898 0 0 3 0x14200 pgdaemon pagedaemon 73837 482475 0 0 3 0x14200 bored crynlk 65955 493770 0 0 3 0x14200 bored crypto 66861 60758 0 0 3 0x40014200 acpi0 acpi0 95413 137149 0 0 3 0x40014200 idle1 86498 290911 0 0 3 0x14200 bored softnet *75607 395420 0 0 7 0x14200 systqmp 50116 92021 0 0 3 0x14200 bored systq 71330 294276 0 0 3 0x40014200 bored softclock 68157 470619 0 0 3 0x40014200 idle0 1 152657 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex mbufpl r = 0 (0xffffffff828e9ab8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_cache_gc+0x12d pl_enter sys/kern/subr_pool.c:104 [inline] #3 pool_cache_gc+0x12d pool_cache_list_put sys/kern/subr_pool.c:1968 [inline] #3 pool_cache_gc+0x12d sys/kern/subr_pool.c:2025 #4 pool_gc_pages+0x6c sys/kern/subr_pool.c:1559 #5 taskq_thread+0xec sys/kern/kern_task.c:437 #6 proc_trampoline+0x1c Process 75607 (systqmp) thread 0xffff800020d984e0 (395420) shared rwlock pools r = 0 (0xffffffff82746b80) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 pool_gc_pages+0x21 sys/kern/subr_pool.c:1555 #2 taskq_thread+0xec sys/kern/kern_task.c:437 #3 proc_trampoline+0x1c shared rwlock systqmp r = 0 (0xffffffff826d8e40) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 taskq_thread+0xdf sys/kern/kern_task.c:436 #2 proc_trampoline+0x1c exclusive mutex mbufpl r = 0 (0xffffffff828e9ab8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_cache_gc+0x12d pl_enter sys/kern/subr_pool.c:104 [inline] #3 pool_cache_gc+0x12d pool_cache_list_put sys/kern/subr_pool.c:1968 [inline] #3 pool_cache_gc+0x12d sys/kern/subr_pool.c:2025 #4 pool_gc_pages+0x6c sys/kern/subr_pool.c:1559 #5 taskq_thread+0xec sys/kern/kern_task.c:437 #6 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9543 6433K 6855K 78643K 11985 0 pcb 13 8K 8K 78643K 204 0 rtable 108 13K 14K 78643K 632 0 ifaddr 128 26K 26K 78643K 352 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 91 0 ioctlops 0 0K 4K 78643K 1645 0 iov 0 0K 32K 78643K 170 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1678 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 15 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 196 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 1073 0 sigio 0 0K 0K 78643K 7 0 proc 62 63K 83K 78643K 528 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 85 0 in_multi 153 5K 6K 78643K 246 0 ether_multi 1 0K 0K 78643K 25 0 mrt 1 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 294 0 pfkey data 0 0K 1K 78643K 2 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 157 106K 115K 78643K 4622 0 UVM aobj 41 4K 4K 78643K 43 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 175 0 NDP 15 0K 0K 78643K 45 0 temp 145 3861K 3934K 78643K 23166 0 kqueue 3 4K 8K 78643K 46 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 16 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 74 0 72 1 0 1 1 0 8 0 rtentry 112 77 0 39 2 0 2 2 0 8 0 unpcb 120 562 0 552 1 0 1 1 0 8 0 syncache 264 18 0 18 4 4 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 350 0 350 3 3 0 1 0 8 0 tcpcb 544 523 0 519 1 0 1 1 0 8 0 inpcb 280 2678 0 2669 5 3 2 2 0 8 0 rttmr 72 4 0 3 1 0 1 1 0 8 0 nd6 48 12 0 9 1 0 1 1 0 8 0 pkpcb 40 7 0 7 4 4 0 1 0 8 0 ppxss 1128 3 0 3 3 3 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 8 0 8 3 3 0 1 0 482 0 pffrnode 88 8 0 8 3 3 0 1 0 8 0 pffrent 40 109 0 109 3 3 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 67 0 63 2 1 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 30 0 26 1 0 1 1 0 8 0 pfstkey 112 30 0 26 1 0 1 1 0 8 0 pfstate 328 29 0 26 3 2 1 3 0 8 0 pfsrctr 152 11 0 9 2 1 1 1 0 8 0 pfrule 1360 58 0 35 4 2 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 321 0 155 14 1 13 14 0 8 2 art_table 32 322 0 155 2 0 2 2 0 8 0 art_node 16 76 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 54 0 35 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 193 0 183 1 0 1 1 0 8 0 shmpl 112 41 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 2877 0 1474 89 0 89 89 0 8 0 ffsino 272 2877 0 1474 96 2 94 95 0 8 0 nchpl 144 4682 0 3072 60 0 60 60 0 8 0 uvmvnodes 72 3236 0 0 59 0 59 59 0 8 0 vnodes 208 3236 0 0 171 0 171 171 0 8 0 namei 1024 12975 0 12975 5 4 1 1 0 8 1 percpumem 16 56 0 24 1 0 1 1 0 8 0 vcpupl 1984 12 0 0 2 0 2 2 0 8 0 vmpool 560 13 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 21 0 16 2 1 1 1 0 8 0 scxspl 192 14594 0 14594 15 14 1 7 0 8 1 plimitpl 152 83 0 75 1 0 1 1 0 8 0 sigapl 424 1310 0 1258 6 0 6 6 0 8 0 futexpl 56 16182 0 16182 4 3 1 1 0 8 1 knotepl 112 110 0 91 1 0 1 1 0 8 0 kqueuepl 144 127 0 123 1 0 1 1 0 8 0 pipelkpl 48 215 0 205 1 0 1 1 0 8 0 pipepl 120 430 0 411 1 0 1 1 0 8 0 fdescpl 496 1274 0 1258 3 0 3 3 0 8 0 filepl 152 8229 0 8129 7 2 5 6 0 8 1 lockfpl 104 283 0 282 1 0 1 1 0 8 0 lockfspl 48 96 0 95 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 34 0 23 1 0 1 1 0 8 0 ucredpl 96 720 0 710 1 0 1 1 0 8 0 zombiepl 144 1258 0 1258 2 1 1 1 0 8 1 processpl 984 1310 0 1258 8 1 7 7 0 8 0 procpl 624 3791 0 3728 6 0 6 6 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 15 0 15 3 2 1 1 0 8 1 sockpl 400 3327 0 3308 11 6 5 5 0 8 3 mcl64k 65536 511 0 0 64 12 52 64 0 8 1 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 172 0 0 21 0 21 21 0 8 0 mtagpl 80 62 0 0 2 0 2 2 0 8 0 mbufpl 256 601 0 0 37 0 37 37 0 8 0 bufpl 280 6036 0 137 422 0 422 422 0 8 0 anonpl 16 128518 0 112155 114 40 74 84 0 124 5 amapchunkpl 152 9085 0 8924 46 25 21 21 0 158 13 amappl16 192 6297 0 5409 75 29 46 57 0 8 1 amappl15 184 10 0 8 1 0 1 1 0 8 0 amappl14 176 27 0 20 1 0 1 1 0 8 0 amappl13 168 29 0 25 1 0 1 1 0 8 0 amappl12 160 10 0 8 1 0 1 1 0 8 0 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 548 0 538 1 0 1 1 0 8 0 amappl9 136 900 0 897 1 0 1 1 0 8 0 amappl8 128 907 0 853 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 28 0 23 1 0 1 1 0 8 0 amappl5 104 1174 0 1157 1 0 1 1 0 8 0 amappl4 96 515 0 481 1 0 1 1 0 8 0 amappl3 88 175 0 170 1 0 1 1 0 8 0 amappl2 80 9266 0 9194 2 0 2 2 0 8 0 amappl1 72 37997 0 37559 23 13 10 18 0 8 0 amappl 80 4047 0 3994 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 42 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1287 0 1259 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1287 0 1259 1 0 1 1 0 8 0 vmmpekpl 168 13622 0 13585 2 0 2 2 0 8 0 vmmpepl 168 160336 0 158233 128 30 98 114 0 357 2 vmsppl 368 1286 0 1259 3 0 3 3 0 8 0 pdppl 4096 2581 0 2530 8 1 7 7 0 8 0 pvpl 32 372637 0 353013 244 64 180 198 0 265 18 pmappl 232 1286 0 1259 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 370 0 31 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff826e9ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0xc0004645f0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff826e9ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0xc0004645f0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823f6d33) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828f7158,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db34e0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db34e0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 sys/kern/subr_pool.c:2025 pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559 taskq_thread(ffffffff826d8dd0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: 5 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823f6d33) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828f7158,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828f6f50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db34e0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db34e0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828e9aa8) at pool_cache_gc+0x138 sys/kern/subr_pool.c:2025 pool_gc_pages(0) at pool_gc_pages+0x6c sys/kern/subr_pool.c:1559 taskq_thread(ffffffff826d8dd0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10