login: 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 365660 8752 0 0x2 0x480 0 syz-executor.1 *164492 16872 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82416036) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82910c78,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da39c0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da39c0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828b1670) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828b1670) 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(ffffffff827494e0) 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(ffffffff82416036) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82910c78,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da39c0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da39c0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828b1670) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828b1670) 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(ffffffff827494e0) 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 0xffff800020da3730 rbx 0xffff800020da37e0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8152edcf kprintf+0x16f r9 0x1 r10 0x2 r11 0x94d8b6cd91f74e29 r12 0x3000000008 r13 0xffff800020da3740 r14 0x100 r15 0x1 rip 0xffffffff81437b38 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020da3720 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=164492 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d88ea0,0xffff800020d884f0 process=0xffff800020d8a7b0 user=0xffff800020d9e000, vmspace=0xffffffff82907748 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66882 44087 1 0 3 0x100083 ttyin getty 59422 317924 88703 0 3 0x82 piperd syz-executor.0 13472 177409 0 0 3 0x14280 nfsidl nfsio 64486 403525 0 0 3 0x14280 nfsidl nfsio 68361 278414 0 0 3 0x14280 nfsidl nfsio 62070 505827 0 0 3 0x14280 nfsidl nfsio 3897 143905 0 0 3 0x14280 nfsidl nfsio 17433 360652 0 0 3 0x14280 nfsidl nfsio 86875 403900 0 0 3 0x14280 nfsidl nfsio 6615 353367 0 0 3 0x14280 nfsidl nfsio 21207 451651 0 0 3 0x14280 nfsidl nfsio 58438 469923 0 0 3 0x14280 nfsidl nfsio 15382 466825 0 0 3 0x14280 nfsidl nfsio 64788 234127 0 0 3 0x14280 nfsidl nfsio 91448 4756 0 0 3 0x14280 nfsidl nfsio 83904 392969 0 0 3 0x14280 nfsidl nfsio 21166 306457 0 0 3 0x14280 nfsidl nfsio 53557 127470 0 0 3 0x14280 nfsidl nfsio 80806 394644 0 0 3 0x14280 nfsidl nfsio 27995 112329 0 0 3 0x14280 nfsidl nfsio 80239 459694 0 0 3 0x14280 nfsidl nfsio 82127 172560 0 0 3 0x14280 nfsidl nfsio 8752 365660 88703 0 7 0x482 syz-executor.1 97488 249490 0 0 3 0x14200 bored sosplice 88703 194040 5682 0 3 0x82 thrsleep syz-fuzzer 88703 278990 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 387207 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 322243 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 521265 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 227964 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 180591 5682 0 3 0x4000082 kqread syz-fuzzer 88703 265450 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 312223 5682 0 3 0x4000082 thrsleep syz-fuzzer 88703 109653 5682 0 3 0x4000082 thrsleep syz-fuzzer 5682 17864 48508 0 3 0x10008a pause ksh 48508 126278 83227 0 3 0x92 select sshd 83227 199175 1 0 3 0x80 select sshd 76263 236017 90246 74 3 0x100092 bpf pflogd 90246 138029 1 0 3 0x80 netio pflogd 6567 350614 65053 73 3 0x100090 kqread syslogd 65053 119486 1 0 3 0x100082 netio syslogd 63979 245810 1 77 3 0x100090 poll dhclient 70112 360236 1 0 3 0x80 poll dhclient 12201 450458 0 0 3 0x14200 bored smr 35841 70371 0 0 3 0x14200 pgzero zerothread 68021 486806 0 0 3 0x14200 aiodoned aiodoned 87307 465582 0 0 3 0x14200 syncer update 84924 509471 0 0 3 0x14200 cleaner cleaner 30708 428952 0 0 3 0x14200 reaper reaper 36643 193452 0 0 3 0x14200 pgdaemon pagedaemon 41929 15217 0 0 3 0x14200 bored crynlk 94127 416165 0 0 3 0x14200 bored crypto 18783 408389 0 0 3 0x40014200 acpi0 acpi0 74074 380517 0 0 3 0x40014200 idle1 49059 157157 0 0 3 0x14200 bored softnet *16872 164492 0 0 7 0x14200 systqmp 4704 309717 0 0 3 0x14200 bored systq 34147 165523 0 0 3 0x40014200 bored softclock 10466 170306 0 0 3 0x40014200 idle0 1 431264 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 (0xffffffff828b1680) #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 16872 (systqmp) thread 0xffff800020d88c30 (164492) shared rwlock pools r = 0 (0xffffffff827a3390) #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 (0xffffffff82749550) #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 (0xffffffff828b1680) #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 9537 6424K 7126K 78643K 11869 0 pcb 13 8K 8K 78643K 103 0 rtable 157 15K 16K 78643K 705 0 ifaddr 110 22K 24K 78643K 265 0 counters 43 33K 34K 78643K 83 0 ioctlops 0 0K 4K 78643K 1629 0 iov 0 0K 16K 78643K 108 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1634 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 86 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 690 0 sigio 0 0K 0K 78643K 9 0 proc 61 63K 95K 78643K 621 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 51 0 in_multi 82 4K 4K 78643K 292 0 ether_multi 1 0K 0K 78643K 15 0 mrt 4 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 278 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 137 104K 113K 78643K 3329 0 UVM aobj 21 7K 7K 78643K 27 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 112 0 NDP 15 0K 0K 78643K 67 0 temp 147 3875K 3941K 78643K 11458 0 kqueue 9 13K 19K 78643K 35 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 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 63 0 61 1 0 1 1 0 8 0 rtentry 112 140 0 95 3 1 2 2 0 8 0 unpcb 120 452 0 442 1 0 1 1 0 8 0 syncache 264 7 0 7 3 3 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 104 0 104 2 2 0 1 0 8 0 tcpcb 544 286 0 281 3 2 1 2 0 8 0 inpcb 296 1852 0 1842 3 1 2 3 0 8 1 rttmr 72 4 0 4 2 2 0 1 0 8 0 nd6 48 48 0 42 1 0 1 1 0 8 0 ppxss 1128 3 0 3 1 1 0 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 1 0 1 1 0 8 0 pfosfp 40 847 0 423 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 52 0 33 2 0 2 2 0 8 0 pfstitem 24 23 0 17 1 0 1 1 0 8 0 pfstkey 112 23 0 17 1 0 1 1 0 8 0 pfstate 328 23 0 17 2 0 2 2 0 8 1 pfrule 1360 51 0 30 3 1 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1067 0 866 21 7 14 16 0 8 1 art_table 32 1069 0 866 3 0 3 3 0 8 1 art_node 16 139 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 18 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 84 0 74 1 0 1 1 0 8 0 shmpl 112 25 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2334 0 931 89 0 89 89 0 8 0 ffsino 272 2334 0 931 95 1 94 95 0 8 0 nchpl 144 3464 0 1866 60 0 60 60 0 8 0 uvmvnodes 72 2676 0 0 49 0 49 49 0 8 0 vnodes 208 2676 0 0 141 0 141 141 0 8 0 namei 1024 10214 0 10214 1 0 1 1 0 8 1 percpumem 16 52 0 20 1 0 1 1 0 8 0 vcpupl 1984 9 0 0 2 0 2 2 0 8 0 vmpool 560 15 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 32 0 18 1 0 1 1 0 8 0 scxspl 192 10434 0 10434 9 8 1 7 0 8 1 plimitpl 152 57 0 49 1 0 1 1 0 8 0 sigapl 424 922 0 870 6 0 6 6 0 8 0 futexpl 56 10590 0 10590 1 0 1 1 0 8 1 knotepl 112 134 0 115 1 0 1 1 0 8 0 kqueuepl 144 99 0 89 1 0 1 1 0 8 0 pipepl 304 207 0 197 5 4 1 2 0 8 0 fdescpl 496 886 0 870 3 0 3 3 0 8 0 filepl 152 6197 0 6091 7 2 5 6 0 8 0 lockfpl 104 159 0 158 1 0 1 1 0 8 0 lockfspl 48 63 0 62 1 0 1 1 0 8 0 sessionpl 112 22 0 11 1 0 1 1 0 8 0 pgrppl 48 28 0 17 1 0 1 1 0 8 0 ucredpl 96 593 0 584 1 0 1 1 0 8 0 zombiepl 144 871 0 870 1 0 1 1 0 8 0 processpl 984 922 0 870 7 0 7 7 0 8 0 procpl 624 2437 0 2376 6 0 6 6 0 8 0 srpgc 64 4 0 4 2 2 0 1 0 8 0 sosppl 128 6 0 6 2 2 0 1 0 8 0 sockpl 400 2371 0 2349 9 5 4 5 0 8 0 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 186 0 0 23 0 23 23 0 8 0 mtagpl 96 29 0 0 1 0 1 1 0 8 0 mbufpl 256 308 0 0 17 0 17 17 0 8 0 bufpl 280 4810 0 135 334 0 334 334 0 8 0 anonpl 16 111796 0 97581 102 23 79 85 0 124 9 amapchunkpl 152 5497 0 5339 17 5 12 12 0 158 5 amappl16 192 4729 0 3811 80 31 49 59 0 8 2 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 26 0 22 1 0 1 1 0 8 0 amappl13 168 198 0 192 1 0 1 1 0 8 0 amappl12 160 172 0 169 2 1 1 1 0 8 0 amappl11 152 529 0 514 1 0 1 1 0 8 0 amappl10 144 25 0 18 1 0 1 1 0 8 0 amappl9 136 389 0 388 1 0 1 1 0 8 0 amappl8 128 411 0 373 2 0 2 2 0 8 0 amappl7 120 131 0 119 1 0 1 1 0 8 0 amappl6 112 494 0 490 1 0 1 1 0 8 0 amappl5 104 636 0 620 1 0 1 1 0 8 0 amappl4 96 693 0 659 1 0 1 1 0 8 0 amappl3 88 280 0 272 1 0 1 1 0 8 0 amappl2 80 6002 0 5928 2 0 2 2 0 8 0 amappl1 72 29645 0 29198 23 13 10 18 0 8 0 amappl 80 2716 0 2666 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 26 0 6 1 0 1 1 0 8 0 uaddrrnd 24 901 0 876 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 901 0 876 1 0 1 1 0 8 0 vmmpekpl 168 11219 0 11179 3 0 3 3 0 8 0 vmmpepl 168 116518 0 114413 159 31 128 128 0 357 31 vmsppl 368 900 0 876 3 0 3 3 0 8 0 pdppl 4096 1809 0 1761 7 0 7 7 0 8 0 pvpl 32 314018 0 296628 217 23 194 200 0 265 30 pmappl 232 900 0 876 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 290 0 18 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82715ff0) 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 __mp_lock(ffffffff82910a70) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0x12e sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82910a70,1) 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(ffff800020eedca0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020eedca0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020eedca0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82808f08,120,ffffffff823f0ecf,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e23ae8,ffff800020eeddd0,ffff800020eede20) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020eedea0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020eedea0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc8010, count: 3 ddb{0}> trace x86_ipi_db(ffffffff82715ff0) 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 __mp_lock(ffffffff82910a70) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0x12e sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82910a70,1) 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(ffff800020eedca0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020eedca0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020eedca0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82808f08,120,ffffffff823f0ecf,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e23ae8,ffff800020eeddd0,ffff800020eede20) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020eedea0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020eedea0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc8010, 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(ffffffff82416036) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82910c78,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da39c0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da39c0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828b1670) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828b1670) 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(ffffffff827494e0) 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(ffffffff82416036) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff82910c78,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82910a70) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020da39c0,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020da39c0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff828b1670) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff828b1670) 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(ffffffff827494e0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10