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 449721 11778 0 0x14000 0x200 0K update *417321 11237 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(ffff800020db3690,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3690) 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(ffff800020db3690,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3690) 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 0xffff800020db3400 rbx 0xffff800020db34b0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff812f44df kprintf+0x16f r9 0x1 r10 0x2 r11 0x7a860121bce4c87a r12 0x3000000008 r13 0xffff800020db3410 r14 0x100 r15 0x1 rip 0xffffffff81db78a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020db33f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=417321 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d98270,0xffff800020d989d0 process=0xffff800020d9ab88 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 50857 445816 39903 0 3 0x80 fsleep syz-executor.1 50857 454102 39903 0 3 0x4000080 lockf syz-executor.1 55323 300045 60078 0 3 0x80 fsleep syz-executor.0 55323 98837 60078 0 3 0x4000080 ttyin syz-executor.0 86559 136167 0 0 3 0x14200 acct acct 90552 390331 0 0 3 0x14200 bored sosplice 39903 318964 28578 0 3 0x82 nanosleep syz-executor.1 60078 479221 28578 0 3 0x82 nanosleep syz-executor.0 28578 446723 46803 0 3 0x82 thrsleep syz-fuzzer 28578 324865 46803 0 2 0x4000082 syz-fuzzer 28578 140089 46803 0 3 0x4000082 thrsleep syz-fuzzer 28578 322655 46803 0 3 0x4000082 thrsleep syz-fuzzer 28578 26838 46803 0 3 0x4000082 thrsleep syz-fuzzer 28578 67358 46803 0 3 0x4000082 thrsleep syz-fuzzer 28578 262277 46803 0 3 0x4000082 thrsleep syz-fuzzer 28578 419320 46803 0 3 0x4000082 thrsleep syz-fuzzer 28578 228072 46803 0 3 0x4000082 kqread syz-fuzzer 28578 371101 46803 0 3 0x4000082 thrsleep syz-fuzzer 46803 486570 7257 0 3 0x10008a pause ksh 7257 287062 46997 0 3 0x92 select sshd 36647 334198 1 0 3 0x100083 ttyin getty 46997 21792 1 0 3 0x80 select sshd 10795 51463 86475 74 3 0x100092 bpf pflogd 86475 399893 1 0 3 0x80 netio pflogd 17575 242215 60127 73 3 0x100090 kqread syslogd 60127 129860 1 0 3 0x100082 netio syslogd 93208 519778 1 77 3 0x100090 poll dhclient 18338 295276 1 0 3 0x80 poll dhclient 45593 188583 0 0 3 0x14200 bored smr 53694 118829 0 0 3 0x14200 pgzero zerothread 6662 390199 0 0 3 0x14200 aiodoned aiodoned 11778 449721 0 0 7 0x14200 update 43324 300057 0 0 3 0x14200 cleaner cleaner 63277 354885 0 0 3 0x14200 reaper reaper 13083 55345 0 0 3 0x14200 pgdaemon pagedaemon 18739 21017 0 0 3 0x14200 bored crynlk 96025 478978 0 0 3 0x14200 bored crypto 68323 290516 0 0 3 0x40014200 acpi0 acpi0 55749 352723 0 0 3 0x40014200 idle1 97666 217336 0 0 3 0x14200 bored softnet *11237 417321 0 0 7 0x14200 systqmp 10731 241787 0 0 3 0x14200 bored systq 10851 160258 0 0 3 0x40014200 bored softclock 48148 115289 0 0 3 0x40014200 idle0 1 212804 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 28578 (syz-fuzzer) thread 0xffff800020dec278 (67358) shared rwlock vmmaplk r = 0 (0xfffffd806e905300) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvm_map_inentry_fix+0xa3 vm_map_lock_read_ln sys/uvm/uvm_map.c:5467 [inline] #1 uvm_map_inentry_fix+0xa3 sys/uvm/uvm_map.c:1858 #2 uvm_map_inentry+0xd2 sys/uvm/uvm_map.c:1890 #3 syscall+0x397 mi_syscall sys/sys/syscall_mi.h:81 [inline] #3 syscall+0x397 sys/arch/amd64/amd64/trap.c:570 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828f7158) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvm_map_inentry+0xbe sys/uvm/uvm_map.c:1890 #2 syscall+0x397 mi_syscall sys/sys/syscall_mi.h:81 [inline] #2 syscall+0x397 sys/arch/amd64/amd64/trap.c:570 #3 Xsyscall+0x128 Process 11237 (systqmp) thread 0xffff800020d98000 (417321) 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 9513 6413K 14601K 78643K 10911 0 pcb 13 8K 8K 78643K 50 0 rtable 108 4K 6K 78643K 307 0 ifaddr 83 17K 17K 78643K 119 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1497 0 iov 0 0K 16K 78643K 35 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1337 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 54 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 217 0 proc 61 63K 95K 78643K 460 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 17 0 in_multi 73 3K 3K 78643K 102 0 ether_multi 1 0K 0K 78643K 6 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 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 230 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 114 54K 54K 78643K 1661 0 UVM aobj 4 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 27 0 NDP 11 0K 0K 78643K 22 0 temp 100 3853K 3928K 78643K 5411 0 kqueue 3 4K 8K 78643K 11 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 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 61 0 19 2 0 2 2 0 8 0 unpcb 120 113 0 101 1 0 1 1 0 8 0 syncache 264 8 0 8 3 3 0 1 0 8 0 tcpqe 32 185 0 185 1 1 0 1 0 8 0 tcpcb 544 147 0 143 1 0 1 1 0 8 0 inpcb 280 298 0 291 3 2 1 2 0 8 0 nd6 48 9 0 5 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 17 0 14 1 0 1 1 0 8 0 pfstitem 24 22 0 9 1 0 1 1 0 8 0 pfstkey 112 22 0 9 1 0 1 1 0 8 0 pfstate 328 22 0 9 2 0 2 2 0 8 0 pfsrctr 152 4 0 4 2 1 1 1 0 8 1 pfrule 1360 27 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 270 0 90 13 0 13 13 0 8 0 art_table 32 271 0 90 2 0 2 2 0 8 0 art_node 16 60 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 52 0 42 1 0 1 1 0 8 0 shmpl 112 4 0 2 2 1 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1715 0 309 89 0 89 89 0 8 0 ffsino 272 1715 0 309 95 0 95 95 0 8 0 nchpl 144 2251 0 636 60 0 60 60 0 8 0 uvmvnodes 72 1835 0 0 34 0 34 34 0 8 0 vnodes 208 1835 0 0 97 0 97 97 0 8 0 namei 1024 6398 0 6398 1 0 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 6 0 4 1 0 1 1 0 8 0 scxspl 192 7364 0 7362 8 7 1 7 0 8 0 plimitpl 152 25 0 17 1 0 1 1 0 8 0 sigapl 424 434 0 400 4 0 4 4 0 8 0 futexpl 56 4006 0 4004 1 0 1 1 0 8 0 knotepl 112 71 0 52 1 0 1 1 0 8 0 kqueuepl 144 27 0 25 1 0 1 1 0 8 0 pipelkpl 48 127 0 117 1 0 1 1 0 8 0 pipepl 120 254 0 235 2 1 1 2 0 8 0 fdescpl 496 417 0 400 3 0 3 3 0 8 0 filepl 152 2655 0 2547 7 2 5 7 0 8 0 lockfpl 104 373 0 370 1 0 1 1 0 8 0 lockfspl 48 105 0 103 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 467 0 458 1 0 1 1 0 8 0 zombiepl 144 400 0 400 1 0 1 1 0 8 1 processpl 984 434 0 400 5 0 5 5 0 8 0 procpl 624 892 0 847 4 0 4 4 0 8 0 sosppl 128 6 0 6 3 3 0 1 0 8 0 sockpl 400 434 0 413 5 2 3 4 0 8 0 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 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 179 0 0 22 1 21 22 0 8 1 mtagpl 80 27 0 0 1 0 1 1 0 8 0 mbufpl 256 266 0 0 15 0 15 15 0 8 0 bufpl 280 4162 0 135 288 0 288 288 0 8 0 anonpl 16 53610 0 37056 72 5 67 69 0 124 0 amapchunkpl 152 2838 0 2673 21 11 10 21 0 158 0 amappl16 192 1875 0 1000 47 3 44 46 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 22 0 18 1 0 1 1 0 8 0 amappl13 168 116 0 111 1 0 1 1 0 8 0 amappl12 160 11 0 7 1 0 1 1 0 8 0 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 26 0 22 1 0 1 1 0 8 0 amappl9 136 477 0 474 1 0 1 1 0 8 0 amappl8 128 441 0 410 2 0 2 2 0 8 0 amappl7 120 121 0 108 1 0 1 1 0 8 0 amappl6 112 24 0 21 1 0 1 1 0 8 0 amappl5 104 323 0 306 1 0 1 1 0 8 0 amappl4 96 575 0 547 1 0 1 1 0 8 0 amappl3 88 115 0 109 1 0 1 1 0 8 0 amappl2 80 2385 0 2309 2 0 2 2 0 8 0 amappl1 72 19120 0 18663 23 13 10 18 0 8 0 amappl 80 1150 0 1100 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 5 0 2 1 0 1 1 0 8 0 uaddrrnd 24 421 0 400 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 421 0 400 1 0 1 1 0 8 0 vmmpekpl 168 7507 0 7470 2 0 2 2 0 8 0 vmmpepl 168 57739 0 55607 116 22 94 109 0 357 1 vmsppl 368 420 0 400 2 0 2 2 0 8 0 pdppl 4096 849 0 804 6 0 6 6 0 8 0 pvpl 32 183851 0 164046 180 19 161 173 0 265 1 pmappl 232 420 0 400 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 265 0 6 8 0 8 8 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 buf_rb_bufs_RBT_COMPARE(ffff800020deaf70,fffffd806f21e9f0) at buf_rb_bufs_RBT_COMPARE+0x23 rb_buf_compare sys/kern/vfs_subr.c:135 [inline] buf_rb_bufs_RBT_COMPARE(ffff800020deaf70,fffffd806f21e9f0) at buf_rb_bufs_RBT_COMPARE+0x23 sys/kern/vfs_subr.c:130 _rb_find(ffffffff8249d9e0,fffffd807efc3bc8,ffff800020deaf70) at _rb_find+0x5d sys/kern/subr_tree.c:450 getblk(fffffd807efc3b60,80,800,0,ffffffffffffffff) at getblk+0xa4 sys/kern/vfs_bio.c:1016 ffs_sbupdate(ffff8000006b1200,3) at ffs_sbupdate+0x1d6 sys/ufs/ffs/ffs_vfsops.c:1524 ffs_sync(ffff8000006c0000,3,0,fffffd807f7bff00,ffff800020dedd48) at ffs_sync+0x2c9 sys/ufs/ffs/ffs_vfsops.c:1294 sync_fsync(ffff800020deb2b0) at sync_fsync+0x1b0 sys/kern/vfs_sync.c:338 VOP_FSYNC(fffffd806f9791b0,fffffd807f7bff00,3,ffff800020dedd48) at VOP_FSYNC+0xbf sys/kern/vfs_vops.c:353 syncer_thread(ffff800020dedd48) at syncer_thread+0x241 sys/kern/vfs_sync.c:169 end trace frame: 0x0, count: 4 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 buf_rb_bufs_RBT_COMPARE(ffff800020deaf70,fffffd806f21e9f0) at buf_rb_bufs_RBT_COMPARE+0x23 rb_buf_compare sys/kern/vfs_subr.c:135 [inline] buf_rb_bufs_RBT_COMPARE(ffff800020deaf70,fffffd806f21e9f0) at buf_rb_bufs_RBT_COMPARE+0x23 sys/kern/vfs_subr.c:130 _rb_find(ffffffff8249d9e0,fffffd807efc3bc8,ffff800020deaf70) at _rb_find+0x5d sys/kern/subr_tree.c:450 getblk(fffffd807efc3b60,80,800,0,ffffffffffffffff) at getblk+0xa4 sys/kern/vfs_bio.c:1016 ffs_sbupdate(ffff8000006b1200,3) at ffs_sbupdate+0x1d6 sys/ufs/ffs/ffs_vfsops.c:1524 ffs_sync(ffff8000006c0000,3,0,fffffd807f7bff00,ffff800020dedd48) at ffs_sync+0x2c9 sys/ufs/ffs/ffs_vfsops.c:1294 sync_fsync(ffff800020deb2b0) at sync_fsync+0x1b0 sys/kern/vfs_sync.c:338 VOP_FSYNC(fffffd806f9791b0,fffffd807f7bff00,3,ffff800020dedd48) at VOP_FSYNC+0xbf sys/kern/vfs_vops.c:353 syncer_thread(ffff800020dedd48) at syncer_thread+0x241 sys/kern/vfs_sync.c:169 end trace frame: 0x0, count: -11 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(ffff800020db3690,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3690) 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(ffff800020db3690,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3690) 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