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 519787 24722 73 0x100010 0 0K syslogd * 60560 88735 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823f636b) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828b3748,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3650,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3650) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff8290a418) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff8290a418) 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(ffffffff827236a0) 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(ffffffff823f636b) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828b3748,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3650,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3650) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff8290a418) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff8290a418) 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(ffffffff827236a0) 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 0xffff800020db33c0 rbx 0xffff800020db3470 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8206186f kprintf+0x16f r9 0x1 r10 0x2 r11 0x9f16f8a3426fcf19 r12 0x3000000008 r13 0xffff800020db33d0 r14 0x100 r15 0x1 rip 0xffffffff81194858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020db33b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) pid=60560 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020d99110,0xffff800020d98760 process=0xffff800020d9a3d8 user=0xffff800020dae000, vmspace=0xffffffff82897490 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70141 343719 88050 0 2 0 syz-executor.0 70141 44119 88050 0 3 0x4000080 msgwait syz-executor.0 39873 288887 0 0 3 0x14200 bored sosplice 12450 466071 75978 0 3 0x82 nanosleep syz-executor.1 88050 149607 75978 0 2 0x482 syz-executor.0 75978 44108 42728 0 3 0x82 thrsleep syz-fuzzer 75978 100759 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 291098 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 160828 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 107379 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 188375 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 391671 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 424477 42728 0 3 0x4000082 kqread syz-fuzzer 75978 433454 42728 0 3 0x4000082 thrsleep syz-fuzzer 75978 244190 42728 0 3 0x4000082 thrsleep syz-fuzzer 42728 386062 32005 0 3 0x10008a pause ksh 32005 424334 62655 0 3 0x92 select sshd 14723 223990 1 0 3 0x100083 ttyin getty 62655 141973 1 0 3 0x80 select sshd 58356 436873 91118 74 3 0x100092 bpf pflogd 91118 56734 1 0 3 0x80 netio pflogd 24722 519787 86491 73 7 0x100010 syslogd 86491 103913 1 0 3 0x100082 netio syslogd 8048 443202 1 77 3 0x100090 poll dhclient 41374 94259 1 0 3 0x80 poll dhclient 18572 278928 0 0 3 0x14200 bored smr 22660 116928 0 0 2 0x14200 zerothread 21639 290127 0 0 3 0x14200 aiodoned aiodoned 73261 37554 0 0 2 0x14200 update 77906 85817 0 0 3 0x14200 cleaner cleaner 50653 375735 0 0 3 0x14200 reaper reaper 21580 2963 0 0 3 0x14200 pgdaemon pagedaemon 75094 463089 0 0 3 0x14200 bored crynlk 33503 326125 0 0 3 0x14200 bored crypto 11144 186782 0 0 3 0x40014200 acpi0 acpi0 98186 329430 0 0 3 0x40014200 idle1 79128 136704 0 0 3 0x14200 bored softnet *88735 60560 0 0 7 0x14200 systqmp 31826 386805 0 0 3 0x14200 bored systq 2719 174969 0 0 3 0x40014200 bored softclock 70142 255096 0 0 3 0x40014200 idle0 1 354538 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 (0xffffffff8290a428) #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 24722 (syslogd) thread 0xffff800020e51870 (519787) exclusive rrwlock inode r = 0 (0xfffffd806ec562b8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vn_read+0x52 sys/kern/vfs_vnops.c:359 #6 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #7 sys_read+0x83 sys/kern/sys_generic.c:157 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828b3748) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #3 sys_read+0x83 sys/kern/sys_generic.c:157 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 Process 88735 (systqmp) thread 0xffff800020d98ea0 (60560) shared rwlock pools r = 0 (0xffffffff82717300) #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 (0xffffffff82723710) #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 (0xffffffff8290a428) #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 9516 6486K 7256K 78643K 11852 0 pcb 13 8K 8K 78643K 61 0 rtable 61 11K 12K 78643K 350 0 ifaddr 63 12K 14K 78643K 115 0 counters 41 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1531 0 iov 0 0K 18K 78643K 54 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1546 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 65 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 311 0 sigio 0 0K 0K 78643K 2 0 proc 62 63K 95K 78643K 461 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 25 0 in_multi 33 1K 2K 78643K 86 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 7 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 225 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 113 54K 70K 78643K 1996 0 UVM aobj 12 2K 2K 78643K 18 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 42 0 NDP 11 0K 0K 78643K 19 0 temp 103 3852K 3912K 78643K 12545 0 kqueue 3 4K 12K 78643K 44 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 7 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 41 0 39 1 0 1 1 0 8 0 rtentry 112 56 0 40 2 0 2 2 0 8 0 unpcb 120 157 0 147 1 0 1 1 0 8 0 syncache 264 6 0 6 3 3 0 1 0 8 0 tcpqe 32 658 0 658 2 2 0 1 0 8 0 tcpcb 544 89 0 83 1 0 1 1 0 8 0 inpcb 280 418 0 409 3 1 2 2 0 8 1 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 7 0 7 1 0 1 1 0 8 1 pkpcb 40 4 0 4 2 1 1 1 0 8 1 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 6 0 6 2 1 1 1 0 482 1 pffrnode 88 6 0 6 2 1 1 1 0 8 1 pffrent 40 141 0 141 2 1 1 1 0 8 1 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 21 0 20 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 57 0 9 1 0 1 1 0 8 0 pfstkey 112 57 0 9 2 0 2 2 0 8 0 pfstate 328 56 0 9 4 0 4 4 0 8 0 pfrule 1360 31 0 20 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 224 0 157 13 3 10 13 0 8 4 art_table 32 226 0 157 2 0 2 2 0 8 0 art_node 16 53 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 59 0 49 1 0 1 1 0 8 0 shmpl 112 16 0 8 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1820 0 419 89 0 89 89 0 8 0 ffsino 272 1820 0 419 94 0 94 94 0 8 0 nchpl 144 2448 0 839 60 0 60 60 0 8 0 uvmvnodes 72 2146 0 0 40 0 40 40 0 8 0 vnodes 208 2146 0 0 113 0 113 113 0 8 0 namei 1024 7109 0 7109 1 0 1 1 0 8 1 percpumem 16 34 0 3 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 5 0 5 1 1 0 1 0 8 0 scxspl 192 7189 0 7188 10 9 1 7 0 8 0 plimitpl 152 40 0 32 1 0 1 1 0 8 0 sigapl 424 527 0 495 4 0 4 4 0 8 0 futexpl 56 4963 0 4963 1 0 1 1 0 8 1 knotepl 112 120 0 101 1 0 1 1 0 8 0 kqueuepl 144 65 0 63 1 0 1 1 0 8 0 pipelkpl 48 215 0 205 1 0 1 1 0 8 0 pipepl 120 430 0 411 1 0 1 1 0 8 0 fdescpl 496 511 0 495 3 0 3 3 0 8 0 filepl 152 3264 0 3163 5 0 5 5 0 8 1 lockfpl 104 73 0 72 1 0 1 1 0 8 0 lockfspl 48 25 0 24 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 331 0 322 1 0 1 1 0 8 0 zombiepl 144 495 0 494 1 0 1 1 0 8 0 processpl 984 527 0 494 5 0 5 5 0 8 0 procpl 624 1215 0 1172 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 0 1 1 0 8 1 sosppl 128 5 0 5 2 1 1 1 0 8 1 sockpl 400 620 0 599 4 0 4 4 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 190 0 0 23 0 23 23 0 8 0 mtagpl 80 17 0 0 1 0 1 1 0 8 0 mbufpl 256 325 0 0 19 0 19 19 0 8 0 bufpl 280 3907 0 135 270 0 270 270 0 8 0 anonpl 16 62949 0 46417 85 3 82 82 0 124 12 amapchunkpl 152 3061 0 2904 20 2 18 20 0 158 9 amappl16 192 2367 0 1468 57 1 56 56 0 8 8 amappl15 184 144 0 141 2 1 1 1 0 8 0 amappl14 176 25 0 21 1 0 1 1 0 8 0 amappl13 168 169 0 165 1 0 1 1 0 8 0 amappl12 160 9 0 9 1 1 0 1 0 8 0 amappl11 152 190 0 173 1 0 1 1 0 8 0 amappl10 144 27 0 20 1 0 1 1 0 8 0 amappl9 136 379 0 378 1 0 1 1 0 8 0 amappl8 128 324 0 305 1 0 1 1 0 8 0 amappl7 120 117 0 106 1 0 1 1 0 8 0 amappl6 112 164 0 158 1 0 1 1 0 8 0 amappl5 104 287 0 271 1 0 1 1 0 8 0 amappl4 96 757 0 728 1 0 1 1 0 8 0 amappl3 88 119 0 112 1 0 1 1 0 8 0 amappl2 80 3151 0 3079 2 0 2 2 0 8 0 amappl1 72 21176 0 20725 23 13 10 18 0 8 0 amappl 80 1479 0 1431 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 17 0 6 1 0 1 1 0 8 0 uaddrrnd 24 518 0 499 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 518 0 499 1 0 1 1 0 8 0 vmmpekpl 168 8464 0 8429 2 0 2 2 0 8 0 vmmpepl 168 69178 0 67118 129 24 105 113 0 357 13 vmsppl 368 517 0 499 2 0 2 2 0 8 0 pdppl 4096 1043 0 1001 6 0 6 6 0 8 0 pvpl 32 202940 0 183773 195 3 192 192 0 265 34 pmappl 232 517 0 499 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 269 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(ffffffff8272fff0) 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_const_cmp4(2,1) at __sanitizer_cov_trace_const_cmp4+0x10 sys/dev/kcov.c:162 tsleep(fffffd806f21c478,11,ffffffff82450ee6,0) at tsleep+0x99 sys/kern/kern_synch.c:127 biowait(fffffd806f21c478) at biowait+0xa6 sys/kern/vfs_bio.c:1256 bwrite(fffffd806f21c478) at bwrite+0x1e4 sys/kern/vfs_bio.c:765 ffs_update(fffffd806ec56aa0,1) at ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 VOP_FSYNC(fffffd806ec575c8,fffffd807f7bfcc0,1,ffff800020e51870) at VOP_FSYNC+0xbf sys/kern/vfs_vops.c:353 sys_fsync(ffff800020e51870,ffff800020e656b0,ffff800020e65700) at sys_fsync+0x127 sys/kern/vfs_syscalls.c:2874 syscall(ffff800020e65780) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e65780) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffef650, count: 3 ddb{0}> trace x86_ipi_db(ffffffff8272fff0) 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_const_cmp4(2,1) at __sanitizer_cov_trace_const_cmp4+0x10 sys/dev/kcov.c:162 tsleep(fffffd806f21c478,11,ffffffff82450ee6,0) at tsleep+0x99 sys/kern/kern_synch.c:127 biowait(fffffd806f21c478) at biowait+0xa6 sys/kern/vfs_bio.c:1256 bwrite(fffffd806f21c478) at bwrite+0x1e4 sys/kern/vfs_bio.c:765 ffs_update(fffffd806ec56aa0,1) at ffs_update+0x2c2 sys/ufs/ffs/ffs_inode.c:113 VOP_FSYNC(fffffd806ec575c8,fffffd807f7bfcc0,1,ffff800020e51870) at VOP_FSYNC+0xbf sys/kern/vfs_vops.c:353 sys_fsync(ffff800020e51870,ffff800020e656b0,ffff800020e65700) at sys_fsync+0x127 sys/kern/vfs_syscalls.c:2874 syscall(ffff800020e65780) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e65780) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffef650, 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(ffffffff823f636b) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828b3748,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3650,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3650) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff8290a418) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff8290a418) 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(ffffffff827236a0) 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(ffffffff823f636b) at panic+0x15c sys/kern/subr_prf.c:207 witness_checkorder(ffffffff828b3748,9,0) at witness_checkorder+0x10e0 sys/kern/subr_witness.c:821 __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff828b3540) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 pageflttrap(ffff800020db3650,0) at pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 kerntrap(ffff800020db3650) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pool_cache_gc(ffffffff8290a418) at pool_cache_gc+0x138 pool_cache_list_put sys/kern/subr_pool.c:1970 [inline] pool_cache_gc(ffffffff8290a418) 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(ffffffff827236a0) at taskq_thread+0xec sys/kern/kern_task.c:437 end trace frame: 0x0, count: -10