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 386673 78121 0 0x14000 0x200 0 softnet *333890 46232 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823ff160) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82899198,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3d40,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3d40) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828c78a0) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828c78a0) 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(ffffffff826d45b0) 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(ffffffff823ff160) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82899198,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3d40,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3d40) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828c78a0) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828c78a0) 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(ffffffff826d45b0) 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 0xffff800020db3ab0 rbx 0xffff800020db3b60 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff821c2b4f kprintf+0x16f r9 0x1 r10 0x2 r11 0xf00fc91603838345 r12 0x3000000008 r13 0xffff800020db3ac0 r14 0x100 r15 0x1 rip 0xffffffff811a3778 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020db3aa0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=333890 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d98ea0,0xffff800020d98760 process=0xffff800020d9a3d8 user=0xffff800020dae000, vmspace=0xffffffff82910998 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84657 156375 89228 0 3 0x90 nanosleep syz-executor.0 84657 255059 89228 0 3 0x4000090 fsleep syz-executor.0 84657 133207 89228 0 3 0x4000090 msgwait syz-executor.0 84657 214736 89228 0 3 0x4000090 fsleep syz-executor.0 84657 398550 89228 0 3 0x4000090 fsleep syz-executor.0 89228 128792 62246 0 2 0x482 syz-executor.0 49940 149910 0 0 3 0x14200 bored sosplice 43750 496585 0 0 3 0x14200 acct acct 65656 95085 62246 0 3 0x82 piperd syz-executor.1 62246 521860 59165 0 3 0x82 thrsleep syz-fuzzer 62246 327121 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 406067 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 187662 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 27031 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 311662 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 451596 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 427685 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 373591 59165 0 3 0x4000082 thrsleep syz-fuzzer 62246 183849 59165 0 3 0x4000082 kqread syz-fuzzer 59165 292347 112 0 3 0x10008a pause ksh 112 292474 23881 0 3 0x92 select sshd 99694 133555 1 0 3 0x100083 ttyin getty 23881 52181 1 0 3 0x80 select sshd 84356 62832 13800 74 3 0x100092 bpf pflogd 13800 112425 1 0 3 0x80 netio pflogd 90231 449043 24419 73 3 0x100090 kqread syslogd 24419 155487 1 0 3 0x100082 netio syslogd 56576 395089 1 77 3 0x100090 poll dhclient 81423 302524 1 0 3 0x80 poll dhclient 18055 374536 0 0 3 0x14200 bored smr 36292 389380 0 0 3 0x14200 pgzero zerothread 2974 121845 0 0 3 0x14200 aiodoned aiodoned 79584 386266 0 0 3 0x14200 syncer update 39859 494662 0 0 3 0x14200 cleaner cleaner 32632 5204 0 0 3 0x14200 reaper reaper 42761 477833 0 0 3 0x14200 pgdaemon pagedaemon 57032 74955 0 0 3 0x14200 bored crynlk 39925 421600 0 0 3 0x14200 bored crypto 43762 206431 0 0 3 0x40014200 acpi0 acpi0 86472 143061 0 0 3 0x40014200 idle1 78121 386673 0 0 7 0x14200 softnet *46232 333890 0 0 7 0x14200 systqmp 61051 316651 0 0 3 0x14200 bored systq 26165 348600 0 0 3 0x40014200 bored softclock 74066 490321 0 0 3 0x40014200 idle0 1 439704 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 (0xffffffff828c78b0) #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 78121 (softnet) thread 0xffff800020d98750 (386673) exclusive rwlock netlock r = 0 (0xffffffff82707e28) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 pf_purge+0x27 sys/net/pf.c:1273 #2 taskq_thread+0xec sys/kern/kern_task.c:437 #3 proc_trampoline+0x1c exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82899198) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 pf_purge+0x1b sys/net/pf.c:1264 #2 taskq_thread+0xec sys/kern/kern_task.c:437 #3 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff80000002c070) #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 Process 46232 (systqmp) thread 0xffff800020d98c30 (333890) shared rwlock pools r = 0 (0xffffffff82742140) #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 (0xffffffff826d4620) #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 (0xffffffff828c78b0) #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 9530 6428K 6737K 78643K 10960 0 pcb 13 8K 8K 78643K 79 0 rtable 86 3K 5K 78643K 1268 0 ifaddr 74 14K 15K 78643K 743 0 sysctl 2 0K 0K 78643K 2 0 counters 41 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1523 0 iov 0 0K 16K 78643K 1431 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1368 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 101 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 1172 0 sigio 0 0K 0K 78643K 2 0 proc 61 63K 95K 78643K 515 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 15 0 in_multi 35 2K 2K 78643K 1994 0 ether_multi 1 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 259 0 pfkey data 0 0K 0K 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 148 40K 40K 78643K 4379 0 UVM aobj 13 2K 3K 78643K 20 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 48 0 NDP 13 0K 0K 78643K 34 0 temp 125 3853K 3917K 78643K 18390 0 kqueue 3 4K 12K 78643K 10 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 8 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 539 0 506 2 0 2 2 0 8 0 unpcb 120 538 0 526 1 0 1 1 0 8 0 syncache 264 6 0 6 3 3 0 1 0 8 0 tcpqe 32 80 0 80 2 2 0 1 0 8 0 tcpcb 544 166 0 160 1 0 1 1 0 8 0 inpcb 280 2716 0 2707 5 4 1 2 0 8 0 nd6 48 492 0 489 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pfstscr 40 7 0 2 1 0 1 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 10 0 10 2 2 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 37 0 13 1 0 1 1 0 8 0 pfstkey 112 39 0 15 1 0 1 1 0 8 0 pfstate 328 35 0 14 3 0 3 3 0 8 0 pfrule 1360 26 0 21 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 250 0 105 13 1 12 13 0 8 1 art_table 32 251 0 105 2 0 2 2 0 8 0 art_node 16 538 0 508 1 0 1 1 0 8 0 sysvmsgpl 40 48 0 21 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 99 0 89 1 0 1 1 0 8 0 shmpl 112 18 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2996 0 1588 89 0 89 89 0 8 0 ffsino 272 2996 0 1588 95 0 95 95 0 8 0 nchpl 144 4748 0 3150 60 0 60 60 0 8 0 uvmvnodes 72 3133 0 0 57 0 57 57 0 8 0 vnodes 208 3133 0 0 165 0 165 165 0 8 0 namei 1024 12561 0 12561 3 2 1 1 0 8 1 percpumem 16 35 0 4 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 3 3 2 1 1 0 8 0 pfiaddrpl 120 3 0 3 2 2 0 1 0 8 0 scxspl 192 14153 0 14153 8 7 1 5 0 8 1 plimitpl 152 24 0 16 1 0 1 1 0 8 0 sigapl 424 1386 0 1353 4 0 4 4 0 8 0 futexpl 56 18540 0 18537 3 2 1 1 0 8 0 knotepl 112 81 0 62 1 0 1 1 0 8 0 kqueuepl 144 44 0 42 1 0 1 1 0 8 0 pipelkpl 48 156 0 145 1 0 1 1 0 8 0 pipepl 120 312 0 291 1 0 1 1 0 8 0 fdescpl 496 1369 0 1353 3 0 3 3 0 8 0 filepl 152 8003 0 7899 5 0 5 5 0 8 0 lockfpl 104 1364 0 1363 1 0 1 1 0 8 0 lockfspl 48 296 0 295 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 344 0 334 1 0 1 1 0 8 0 zombiepl 144 1353 0 1353 1 0 1 1 0 8 1 processpl 984 1386 0 1353 5 0 5 5 0 8 0 procpl 624 3529 0 3483 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 10 0 10 2 2 0 1 0 8 0 sockpl 400 3300 0 3277 6 3 3 4 0 8 0 mcl64k 65536 8 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 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 172 0 0 21 0 21 21 0 8 0 mtagpl 80 13 0 0 1 0 1 1 0 8 0 mbufpl 256 317 0 0 19 0 19 19 0 8 0 bufpl 280 5309 0 135 370 0 370 370 0 8 0 anonpl 16 112896 0 97069 67 2 65 66 0 124 0 amapchunkpl 152 6740 0 6606 8 1 7 8 0 158 0 amappl16 192 5804 0 4907 47 1 46 46 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 558 0 552 1 0 1 1 0 8 0 amappl13 168 39 0 35 1 0 1 1 0 8 0 amappl12 160 549 0 546 1 0 1 1 0 8 0 amappl11 152 63 0 48 1 0 1 1 0 8 0 amappl10 144 19 0 14 1 0 1 1 0 8 0 amappl9 136 380 0 379 1 0 1 1 0 8 0 amappl8 128 410 0 356 2 0 2 2 0 8 0 amappl7 120 144 0 129 1 0 1 1 0 8 0 amappl6 112 24 0 20 1 0 1 1 0 8 0 amappl5 104 1279 0 1262 1 0 1 1 0 8 0 amappl4 96 503 0 474 1 0 1 1 0 8 0 amappl3 88 132 0 127 1 0 1 1 0 8 0 amappl2 80 10452 0 10381 2 0 2 2 0 8 0 amappl1 72 36838 0 36399 23 13 10 18 0 8 0 amappl 80 3792 0 3746 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 19 0 7 1 0 1 1 0 8 0 uaddrrnd 24 1374 0 1356 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1374 0 1356 1 0 1 1 0 8 0 vmmpekpl 168 12466 0 12431 2 0 2 2 0 8 0 vmmpepl 168 166632 0 164560 134 37 97 119 0 357 1 vmsppl 368 1373 0 1356 2 0 2 2 0 8 0 pdppl 4096 2755 0 2714 6 0 6 6 0 8 0 pvpl 32 384655 0 365508 169 9 160 160 0 265 4 pmappl 232 1373 0 1356 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 270 0 9 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82711ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:88 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f msleep(ffff80000002c000,ffff80000002c018,10,ffff800020db9b18,206) at msleep+0x10 sys/kern/kern_synch.c:207 taskq_next_work(ffff80000002c000,ffff800020db9b88) at taskq_next_work+0x8d sys/kern/kern_task.c:394 taskq_thread(ffff80000002c000) at taskq_thread+0x135 sys/kern/kern_task.c:434 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82711ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:88 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f msleep(ffff80000002c000,ffff80000002c018,10,ffff800020db9b18,206) at msleep+0x10 sys/kern/kern_synch.c:207 taskq_next_work(ffff80000002c000,ffff800020db9b88) at taskq_next_work+0x8d sys/kern/kern_task.c:394 taskq_thread(ffff80000002c000) at taskq_thread+0x135 sys/kern/kern_task.c:434 end trace frame: 0x0, count: -9 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(ffffffff823ff160) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82899198,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3d40,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3d40) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828c78a0) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828c78a0) 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(ffffffff826d45b0) 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(ffffffff823ff160) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82899198,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82898f90) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3d40,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3d40) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828c78a0) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828c78a0) 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(ffffffff826d45b0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10