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 360294 16520 0 0x2 0x480 0 syz-executor.1 *211961 40775 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8241cf86) at panic+0x164 sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828ecbf8,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2eb0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2eb0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82936538) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82936538) 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(ffffffff827a7f80) 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(ffffffff8241cf86) at panic+0x164 sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828ecbf8,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2eb0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2eb0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82936538) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82936538) 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(ffffffff827a7f80) 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 0xffff800020da2c20 rbx 0xffff800020da2cd0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020da2be0 r9 0xffffffff817bd10f kprintf+0x16f r10 0x1 r11 0x7522c1cdff787cac r12 0x3000000008 r13 0xffff800020da2c30 r14 0x100 r15 0x1 rip 0xffffffff821dd518 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020da2c10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=211961 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020d88750,0xffff800020d88010 process=0xffff800020d8a000 user=0xffff800020d9e000, vmspace=0xffffffff8292ca08 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55325 355934 86525 0 3 0x82 piperd syz-executor.0 83793 395125 0 0 3 0x14200 bored sosplice 16520 360294 86525 0 7 0x482 syz-executor.1 86525 399569 38295 0 3 0x82 thrsleep syz-fuzzer 86525 274342 38295 0 3 0x4000082 thrsleep syz-fuzzer 86525 72620 38295 0 3 0x4000082 thrsleep syz-fuzzer 86525 221795 38295 0 3 0x4000082 thrsleep syz-fuzzer 86525 516770 38295 0 3 0x4000082 thrsleep syz-fuzzer 86525 314298 38295 0 3 0x4000082 thrsleep syz-fuzzer 86525 9447 38295 0 3 0x4000082 thrsleep syz-fuzzer 86525 406116 38295 0 3 0x4000082 kqread syz-fuzzer 38295 204959 86963 0 3 0x10008a pause ksh 86963 450656 63970 0 3 0x92 select sshd 37895 487995 1 0 3 0x100083 ttyin getty 63970 89937 1 0 3 0x80 select sshd 80305 362643 49550 74 3 0x100092 bpf pflogd 49550 517627 1 0 3 0x80 netio pflogd 51756 47876 59495 73 3 0x100090 kqread syslogd 59495 356438 1 0 3 0x100082 netio syslogd 3215 419550 1 77 3 0x100090 poll dhclient 75063 130749 1 0 3 0x80 poll dhclient 2821 266274 0 0 3 0x14200 bored smr 17522 508320 0 0 3 0x14200 pgzero zerothread 89412 395050 0 0 3 0x14200 aiodoned aiodoned 50024 444745 0 0 3 0x14200 syncer update 85049 409284 0 0 3 0x14200 cleaner cleaner 55342 451851 0 0 3 0x14200 reaper reaper 65816 312931 0 0 3 0x14200 pgdaemon pagedaemon 34246 151454 0 0 3 0x14200 bored crynlk 97897 380384 0 0 3 0x14200 bored crypto 19472 281316 0 0 3 0x40014200 acpi0 acpi0 31457 372766 0 0 3 0x40014200 idle1 20938 311035 0 0 3 0x14200 bored softnet *40775 211961 0 0 7 0x14200 systqmp 57146 519481 0 0 3 0x14200 bored systq 6427 86464 0 0 3 0x40014200 bored softclock 68081 519201 0 0 3 0x40014200 idle0 1 83012 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 (0xffffffff82936548) #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 40775 (systqmp) thread 0xffff800020d884e0 (211961) shared rwlock pools r = 0 (0xffffffff8279e510) #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 (0xffffffff827a7ff0) #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 (0xffffffff82936548) #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 9500 6408K 7371K 78643K 11452 0 pcb 13 8K 8K 78643K 37 0 rtable 112 4K 8K 78643K 336 0 ifaddr 64 13K 13K 78643K 103 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1503 0 iov 0 0K 12K 78643K 30 0 mount 1 1K 1K 78643K 1 0 vnodes 1232 77K 78K 78643K 1459 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 24 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 220 0 sigio 0 0K 0K 78643K 4 0 proc 61 63K 95K 78643K 504 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 7 0 in_multi 43 2K 2K 78643K 85 0 ether_multi 1 0K 0K 78643K 3 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 229 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 162 26K 26K 78643K 1760 0 UVM aobj 17 4K 4K 78643K 17 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 16 0 NDP 10 0K 0K 78643K 25 0 temp 123 3862K 3928K 78643K 6737 0 kqueue 3 4K 9K 78643K 12 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 9 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 29 2 0 2 2 0 8 0 unpcb 120 98 0 88 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 166 0 166 1 1 0 1 0 8 0 tcpcb 544 46 0 42 1 0 1 1 0 8 0 inpcb 296 213 0 206 3 1 2 2 0 8 1 nd6 48 20 0 13 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 1 0 1 0 8 0 pfstscr 40 2 0 2 1 0 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 2 0 2 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 16 0 16 2 2 0 1 0 8 0 pfstitem 24 24 0 11 1 0 1 1 0 8 0 pfstkey 112 27 0 14 1 0 1 1 0 8 0 pfstate 328 26 0 13 2 0 2 2 0 8 0 pfrule 1360 26 0 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 285 0 97 15 1 14 14 0 8 2 art_table 32 286 0 97 2 0 2 2 0 8 0 art_node 16 74 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 62 0 22 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 22 0 12 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 1695 0 289 89 0 89 89 0 8 0 ffsino 272 1695 0 289 95 0 95 95 0 8 0 nchpl 144 2193 0 605 60 0 60 60 0 8 0 uvmvnodes 72 1954 0 0 36 0 36 36 0 8 0 vnodes 208 1954 0 0 103 0 103 103 0 8 0 namei 1024 6175 0 6175 2 1 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 vmpool 560 2 0 2 1 1 0 1 0 8 0 pfiaddrpl 120 5 0 5 2 2 0 1 0 8 0 scxspl 192 6526 0 6526 8 7 1 7 0 8 1 plimitpl 152 30 0 22 1 0 1 1 0 8 0 sigapl 424 433 0 401 4 0 4 4 0 8 0 futexpl 56 3054 0 3054 2 1 1 1 0 8 1 knotepl 112 87 0 67 1 0 1 1 0 8 0 kqueuepl 144 29 0 27 1 0 1 1 0 8 0 pipepl 304 105 0 94 2 1 1 2 0 8 0 fdescpl 496 417 0 401 3 0 3 3 0 8 0 filepl 152 2350 0 2244 5 0 5 5 0 8 0 lockfpl 104 40 0 39 1 0 1 1 0 8 0 lockfspl 48 18 0 17 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 96 227 0 218 1 0 1 1 0 8 0 zombiepl 144 402 0 401 1 0 1 1 0 8 0 processpl 992 433 0 401 5 0 5 5 0 8 0 procpl 624 901 0 862 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 336 0 317 4 1 3 3 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 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 239 0 0 29 0 29 29 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 264 0 0 16 0 16 16 0 8 0 bufpl 280 3716 0 127 257 0 257 257 0 8 0 anonpl 16 55516 0 41693 76 1 75 75 0 124 0 amapchunkpl 152 2648 0 2349 14 0 14 14 0 158 0 amappl16 192 1652 0 815 43 0 43 43 0 8 0 amappl15 184 79 0 78 1 0 1 1 0 8 0 amappl14 176 4 0 0 1 0 1 1 0 8 0 amappl13 168 130 0 124 1 0 1 1 0 8 0 amappl12 160 29 0 26 1 0 1 1 0 8 0 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 102 0 98 1 0 1 1 0 8 0 amappl9 136 366 0 365 1 0 1 1 0 8 0 amappl8 128 359 0 322 2 0 2 2 0 8 0 amappl7 120 199 0 188 1 0 1 1 0 8 0 amappl6 112 34 0 26 1 0 1 1 0 8 0 amappl5 104 310 0 293 1 0 1 1 0 8 0 amappl4 96 582 0 553 1 0 1 1 0 8 0 amappl3 88 129 0 119 1 0 1 1 0 8 0 amappl2 80 2327 0 2257 2 0 2 2 0 8 0 amappl1 72 21854 0 21385 23 13 10 18 0 8 0 amappl 80 1213 0 1132 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 16 0 0 1 0 1 1 0 8 0 uaddrrnd 24 419 0 403 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 419 0 403 1 0 1 1 0 8 0 vmmpekpl 168 7398 0 7360 2 0 2 2 0 8 0 vmmpepl 168 60834 0 58760 151 25 126 129 0 357 33 vmsppl 368 418 0 403 2 0 2 2 0 8 0 pdppl 4096 845 0 806 8 2 6 6 0 8 1 pvpl 32 189045 0 172019 180 5 175 180 0 265 0 pmappl 232 418 0 403 3 2 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 276 0 8 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82713ff0) 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+0x58 sys/dev/kcov.c:86 __mp_acquire_count(ffffffff828ec9f0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800022af19d0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800022af19d0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800022af19d0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82892ec0,120,ffffffff823fd7ee,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020ddc278,ffff800022af1b00,ffff800022af1b50) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800022af1bd0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022af1bd0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6fe0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff82713ff0) 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+0x58 sys/dev/kcov.c:86 __mp_acquire_count(ffffffff828ec9f0,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800022af19d0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800022af19d0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800022af19d0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82892ec0,120,ffffffff823fd7ee,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020ddc278,ffff800022af1b00,ffff800022af1b50) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800022af1bd0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022af1bd0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6fe0, 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(ffffffff8241cf86) at panic+0x164 sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828ecbf8,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2eb0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2eb0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82936538) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82936538) 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(ffffffff827a7f80) 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(ffffffff8241cf86) at panic+0x164 sys/kern/subr_prf.c:218 witness_checkorder(ffffffff828ecbf8,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828ec9f0) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da2eb0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da2eb0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff82936538) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff82936538) 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(ffffffff827a7f80) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10