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 11906 67209 74 0x100012 0 0K pflogd * 61499 89456 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823fabdf) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828c9c58,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2e90,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2e90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82900640) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82900640) 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(ffffffff8276ab00) 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(ffffffff823fabdf) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828c9c58,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2e90,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2e90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82900640) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82900640) 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(ffffffff8276ab00) 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 0xffff800020da2c00 rbx 0xffff800020da2cb0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81ba7bdf kprintf+0x16f r9 0x1 r10 0x2 r11 0xb6ce915f7cbc5195 r12 0x3000000008 r13 0xffff800020da2c10 r14 0x100 r15 0x1 rip 0xffffffff815eaaf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020da2bf0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=61499 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d889c0,0xffff800020d884f0 process=0xffff800020d8a7b0 user=0xffff800020d9e000, vmspace=0xffffffff828f41d8 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 48227 59901 15804 0 2 0 syz-executor.0 48227 128829 15804 0 3 0x4000080 fsleep syz-executor.0 83767 109128 32647 0 2 0x482 syz-executor.1 15366 377805 0 0 3 0x14280 nfsidl nfsio 56671 431985 0 0 3 0x14280 nfsidl nfsio 48099 80598 0 0 3 0x14280 nfsidl nfsio 88564 347084 0 0 3 0x14280 nfsidl nfsio 42662 87451 0 0 3 0x14280 nfsidl nfsio 31851 420890 0 0 3 0x14280 nfsidl nfsio 68089 324632 0 0 3 0x14280 nfsidl nfsio 62434 466896 0 0 3 0x14280 nfsidl nfsio 70495 232401 0 0 3 0x14280 nfsidl nfsio 37716 182456 0 0 3 0x14280 nfsidl nfsio 165 174095 0 0 3 0x14280 nfsidl nfsio 19181 475644 0 0 3 0x14280 nfsidl nfsio 31144 31003 0 0 3 0x14280 nfsidl nfsio 13614 70551 0 0 3 0x14280 nfsidl nfsio 89113 153319 0 0 3 0x14280 nfsidl nfsio 93109 274443 0 0 3 0x14280 nfsidl nfsio 76304 520732 0 0 3 0x14280 nfsidl nfsio 29387 471128 0 0 3 0x14280 nfsidl nfsio 18521 40386 0 0 3 0x14280 nfsidl nfsio 64986 168863 0 0 3 0x14280 nfsidl nfsio 81481 24301 0 0 3 0x14200 bored sosplice 15804 477137 32647 0 2 0x482 syz-executor.0 32647 170465 40301 0 3 0x82 thrsleep syz-fuzzer 32647 147255 40301 0 2 0x4000482 syz-fuzzer 32647 176580 40301 0 2 0x4000482 syz-fuzzer 32647 483212 40301 0 3 0x4000082 thrsleep syz-fuzzer 32647 173175 40301 0 3 0x4000082 thrsleep syz-fuzzer 32647 403623 40301 0 3 0x4000082 thrsleep syz-fuzzer 32647 40057 40301 0 3 0x4000082 thrsleep syz-fuzzer 32647 292970 40301 0 3 0x4000082 thrsleep syz-fuzzer 32647 115037 40301 0 2 0x4000482 syz-fuzzer 32647 472698 40301 0 3 0x4000082 kqread syz-fuzzer 40301 430672 23850 0 3 0x10008a pause ksh 23850 58010 25625 0 3 0x92 select sshd 44612 488579 1 0 3 0x100083 ttyin getty 25625 255106 1 0 3 0x80 select sshd 67209 11906 39313 74 7 0x100012 pflogd 39313 475180 1 0 3 0x80 netio pflogd 31507 416540 98296 73 2 0x100090 syslogd 98296 280928 1 0 3 0x100082 netio syslogd 39317 76764 1 77 3 0x100090 poll dhclient 9755 451907 1 0 3 0x80 poll dhclient 5409 456530 0 0 3 0x14200 bored smr 10908 75675 0 0 2 0x14200 zerothread 85042 240185 0 0 3 0x14200 aiodoned aiodoned 1296 321488 0 0 2 0x14200 update 52102 35883 0 0 3 0x14200 cleaner cleaner 54353 195320 0 0 3 0x14200 reaper reaper 30012 46820 0 0 3 0x14200 pgdaemon pagedaemon 55156 91646 0 0 3 0x14200 bored crynlk 68899 7372 0 0 3 0x14200 bored crypto 67760 408710 0 0 3 0x40014200 acpi0 acpi0 44971 109404 0 0 3 0x40014200 idle1 21194 77700 0 0 2 0x14200 softnet *89456 61499 0 0 7 0x14200 systqmp 81056 312157 0 0 3 0x14200 bored systq 53614 479601 0 0 3 0x40014200 bored softclock 46319 50040 0 0 3 0x40014200 idle0 1 407040 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 (0xffffffff82900650) #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 89456 (systqmp) thread 0xffff800020d88750 (61499) shared rwlock pools r = 0 (0xffffffff82724a30) #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 (0xffffffff8276ab70) #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 (0xffffffff82900650) #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 9526 6427K 7067K 78643K 11466 0 pcb 13 8K 8K 78643K 82 0 rtable 106 5K 7K 78643K 419 0 ifaddr 88 17K 17K 78643K 173 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 65 0 ioctlops 0 0K 4K 78643K 1520 0 iov 0 0K 16K 78643K 56 0 mount 1 1K 1K 78643K 1 0 vnodes 1223 77K 77K 78643K 1522 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 72 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 437 0 sigio 0 0K 0K 78643K 18 0 proc 61 63K 95K 78643K 519 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 28 0 in_multi 63 3K 3K 78643K 119 0 ether_multi 1 0K 0K 78643K 11 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 265 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 125 39K 43K 78643K 2397 0 UVM aobj 16 2K 2K 78643K 16 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 46 0 NDP 13 0K 0K 78643K 33 0 temp 123 3853K 3923K 78643K 11401 0 kqueue 3 4K 8K 78643K 19 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 11 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 75 0 35 3 1 2 2 0 8 0 unpcb 120 277 0 267 1 0 1 1 0 8 0 syncache 264 11 0 11 3 2 1 1 0 8 1 tcpqe 32 280 0 280 2 1 1 1 0 8 1 tcpcb 544 153 0 147 1 0 1 1 0 8 0 inpcb 280 779 0 767 3 1 2 2 0 8 1 nd6 48 14 0 12 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 2 0 2 2 1 1 1 0 8 1 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 45 0 45 1 1 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 26 0 23 1 0 1 1 0 8 0 pfstitem 24 56 0 13 1 0 1 1 0 8 0 pfstkey 112 56 0 13 2 0 2 2 0 8 0 pfstate 328 56 0 13 4 0 4 4 0 8 0 pfrule 1360 31 0 22 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 338 0 171 15 3 12 13 0 8 0 art_table 32 339 0 171 2 0 2 2 0 8 0 art_node 16 74 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 11 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 70 0 60 1 0 1 1 0 8 0 shmpl 112 14 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1997 0 597 89 1 88 89 0 8 0 ffsino 272 1997 0 597 95 1 94 94 0 8 0 nchpl 144 2762 0 1179 60 0 60 60 0 8 0 uvmvnodes 72 2270 0 0 42 0 42 42 0 8 0 vnodes 208 2270 0 0 120 0 120 120 0 8 0 namei 1024 7784 0 7784 4 3 1 1 0 8 1 percpumem 16 43 0 11 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 8 0 6 2 1 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 8382 0 8382 9 8 1 5 0 8 1 plimitpl 152 32 0 24 1 0 1 1 0 8 0 sigapl 424 670 0 618 6 0 6 6 0 8 0 futexpl 56 6299 0 6298 3 2 1 1 0 8 0 knotepl 112 89 0 70 1 0 1 1 0 8 0 kqueuepl 144 67 0 62 1 0 1 1 0 8 0 pipelkpl 48 147 0 137 1 0 1 1 0 8 0 pipepl 120 294 0 275 1 0 1 1 0 8 0 fdescpl 496 634 0 618 3 0 3 3 0 8 0 filepl 152 3815 0 3713 7 2 5 6 0 8 0 lockfpl 104 128 0 127 1 0 1 1 0 8 0 lockfspl 48 51 0 50 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 263 0 254 1 0 1 1 0 8 0 zombiepl 144 618 0 617 4 3 1 1 0 8 0 processpl 984 670 0 617 8 1 7 7 0 8 0 procpl 624 1589 0 1526 6 0 6 6 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 6 0 5 2 1 1 1 0 8 0 sockpl 400 1093 0 1071 7 3 4 4 0 8 1 mcl64k 65536 263 0 0 33 1 32 33 0 8 1 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 237 0 0 29 0 29 29 0 8 0 mtagpl 80 47 0 0 1 0 1 1 0 8 0 mbufpl 256 365 0 0 22 0 22 22 0 8 0 bufpl 280 4144 0 137 287 0 287 287 0 8 0 anonpl 16 86977 0 67446 93 14 79 81 0 124 0 amapchunkpl 152 3535 0 3377 9 2 7 8 0 158 0 amappl16 192 3694 0 2579 74 18 56 56 0 8 0 amappl15 184 196 0 193 1 0 1 1 0 8 0 amappl14 176 35 0 27 1 0 1 1 0 8 0 amappl13 168 36 0 32 1 0 1 1 0 8 0 amappl12 160 13 0 10 1 0 1 1 0 8 0 amappl11 152 64 0 49 1 0 1 1 0 8 0 amappl10 144 158 0 153 1 0 1 1 0 8 0 amappl9 136 308 0 305 1 0 1 1 0 8 0 amappl8 128 442 0 409 2 0 2 2 0 8 0 amappl7 120 128 0 114 1 0 1 1 0 8 0 amappl6 112 29 0 24 1 0 1 1 0 8 0 amappl5 104 803 0 787 1 0 1 1 0 8 0 amappl4 96 503 0 476 1 0 1 1 0 8 0 amappl3 88 123 0 118 1 0 1 1 0 8 0 amappl2 80 4214 0 4142 2 0 2 2 0 8 0 amappl1 72 23770 0 23338 23 12 11 18 0 8 0 amappl 80 1836 0 1791 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 636 0 618 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 636 0 618 1 0 1 1 0 8 0 vmmpekpl 168 8975 0 8933 2 0 2 2 0 8 0 vmmpepl 168 84766 0 82500 147 24 123 123 0 357 24 vmsppl 368 635 0 618 2 0 2 2 0 8 0 pdppl 4096 1279 0 1238 7 1 6 6 0 8 0 pvpl 32 246702 0 223915 217 33 184 194 0 265 0 pmappl 232 635 0 618 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 321 0 16 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8277cff0) 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_cmp8(0,ffffffffffffffcd) at __sanitizer_cov_trace_cmp8+0x60 sys/dev/kcov.c:144 bpfread(21700,ffff800020e47b18,0) at bpfread+0x203 sys/net/bpf.c:489 spec_read(ffff800020e47960) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e81a360,ffff800020e47b18,0,fffffd807f7bf7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806eae18f0,ffff800020e47b18,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e409d0,4,ffff800020e47b18,0,ffff800020e47c00) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e409d0,ffff800020e47bb0,ffff800020e47c00) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020e47c80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e47c80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc66a0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff8277cff0) 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_cmp8(0,ffffffffffffffcd) at __sanitizer_cov_trace_cmp8+0x60 sys/dev/kcov.c:144 bpfread(21700,ffff800020e47b18,0) at bpfread+0x203 sys/net/bpf.c:489 spec_read(ffff800020e47960) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e81a360,ffff800020e47b18,0,fffffd807f7bf7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806eae18f0,ffff800020e47b18,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e409d0,4,ffff800020e47b18,0,ffff800020e47c00) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e409d0,ffff800020e47bb0,ffff800020e47c00) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020e47c80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e47c80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc66a0, count: -12 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(ffffffff823fabdf) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828c9c58,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2e90,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2e90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82900640) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82900640) 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(ffffffff8276ab00) 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(ffffffff823fabdf) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828c9c58,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828c9a50) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2e90,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2e90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82900640) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82900640) 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(ffffffff8276ab00) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10