witness: lock order reversal: 1st 0xfffffd807effe748 vmmaplk (&map->lock) 2nd 0xfffffd806da2a3d8 inode (&ip->i_lock) lock order "&ip->i_lock"(rrwlock) -> "&map->lock"(rwlock) first seen at: #0 witness_checkorder+0x65e witness_lock_order_add sys/kern/subr_witness.c:2463 [inline] #0 witness_checkorder+0x65e sys/kern/subr_witness.c:880 #1 rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 #2 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1438 #3 uvm_fault+0x7e sys/uvm/uvm_fault.c:526 #4 pageflttrap+0x24f sys/arch/amd64/amd64/trap.c:219 #5 kerntrap+0xf1 sys/arch/amd64/amd64/trap.c:300 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x53 #8 ffs_read+0x3e2 sys/ufs/ffs/ffs_vnops.c:258 #9 VOP_READ+0xbf sys/kern/vfs_vops.c:253 #10 vn_rdwr+0x10b #11 vmcmd_map_readvn+0xda sys/kern/exec_subr.c:246 #12 exec_process_vmcmds+0xb2 sys/kern/exec_subr.c:143 #13 sys_execve+0x9ff sys/kern/kern_exec.c:461 #14 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 #15 Xsyscall+0x128 lock order "&map->lock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at: #0 witness_checkorder+0x65e witness_lock_order_add sys/kern/subr_witness.c:2463 [inline] #0 witness_checkorder+0x65e sys/kern/subr_witness.c:880 #1 rw_enter+0xd4 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 uvn_io+0x2b5 sys/uvm/uvm_vnode.c:1196 #6 uvn_get+0x226 sys/uvm/uvm_vnode.c:1056 #7 uvm_fault+0x1197 sys/uvm/uvm_fault.c:1016 #8 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1285 #9 uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367 #10 sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 #11 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 #12 Xsyscall+0x128 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd806da2a3d8,9,0) at witness_checkorder+0xf5a witness_debugger sys/kern/subr_witness.c:2490 [inline] witness_checkorder(fffffd806da2a3d8,9,0) at witness_checkorder+0xf5a sys/kern/subr_witness.c:1087 rw_enter(fffffd806da2a3c8,81) at rw_enter+0xd4 rrw_enter(fffffd806da2a3c8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462 VOP_LOCK(fffffd806d96cec0,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 vn_lock(fffffd806d96cec0,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575 uvn_io(fffffd806dd3eb48,ffff8000234e4e08,1,2,0) at uvn_io+0x2b5 sys/uvm/uvm_vnode.c:1196 uvn_get(fffffd806dd3eb48,6000,ffff8000234e5060,ffff8000234e4ffc,0,3) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1056 uvm_fault(fffffd807effe730,1b2e226000,2,3) at uvm_fault+0x1197 sys/uvm/uvm_fault.c:1016 uvm_fault_wire(fffffd807effe730,1b2e220000,1b2f220000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1285 uvm_map_pageable_wire(fffffd807effe730,fffffd8061928d48,0,35b,ffffffff818ce5a0,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367 sys_mlockall(ffff8000212d8020,ffff8000234e5238,ffff8000234e5280) at sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 syscall(ffff8000234e5300) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234e5300) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x204e90ddcf0, count: -14 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff8000234e4a60 rbx 0x3 rdx 0xffff800000abd200 rcx 0x3 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffffffff812026e3 witness_checkorder+0xf33 r9 0x5 r10 0x1ca00dce4a033694 r11 0xc5bf82f1c72cc21 r12 0xffffffff8281d3c0 w_lodata+0x54430 r13 0 r14 0xffffffff8280b1a0 w_lodata+0x42210 r15 0xfffffd8002c91480 rip 0xffffffff8200ee08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000234e4a50 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=138261 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212d9b48,0xffffffff82881f78 process=0xffff8000212c6400 user=0xffff8000234e0000, vmspace=0xfffffd807effe730 estcpu=36, cpticks=8, pctcpu=0.0 user=0, sys=8, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97519 145524 55462 0 2 0 syz-executor.0 *97519 138261 55462 0 7 0x4000000 syz-executor.0 80409 363189 97181 0 2 0x2 syz-executor.1 55462 492882 97181 0 2 0x482 syz-executor.0 97181 349683 21588 0 3 0x82 thrsleep syz-fuzzer 97181 139935 21588 0 7 0x4000482 syz-fuzzer 97181 182617 21588 0 3 0x4000082 kqread syz-fuzzer 97181 50552 21588 0 3 0x4000082 thrsleep syz-fuzzer 97181 130564 21588 0 3 0x4000082 thrsleep syz-fuzzer 97181 468867 21588 0 3 0x4000082 thrsleep syz-fuzzer 97181 475277 21588 0 3 0x4000082 thrsleep syz-fuzzer 97181 441198 21588 0 3 0x4000082 thrsleep syz-fuzzer 21588 368837 46464 0 3 0x10008a pause ksh 46464 306625 90605 0 3 0x92 select sshd 80247 367651 1 0 3 0x100083 ttyin getty 90605 196574 1 0 3 0x80 select sshd 66501 250159 25361 74 3 0x100092 bpf pflogd 25361 134967 1 0 3 0x80 netio pflogd 43480 518009 19160 73 3 0x100090 kqread syslogd 19160 231117 1 0 3 0x100082 netio syslogd 47631 176795 1 77 3 0x100090 poll dhclient 7659 472915 1 0 3 0x80 poll dhclient 84073 113209 0 0 3 0x14200 bored smr 29609 499049 0 0 2 0x14200 zerothread 6876 36096 0 0 3 0x14200 aiodoned aiodoned 1520 245487 0 0 3 0x14200 syncer update 84386 400207 0 0 3 0x14200 cleaner cleaner 89606 271197 0 0 3 0x14200 reaper reaper 76354 287536 0 0 3 0x14200 pgdaemon pagedaemon 27415 68741 0 0 3 0x14200 bored crynlk 44300 111094 0 0 3 0x14200 bored crypto 58394 334944 0 0 3 0x40014200 acpi0 acpi0 82341 84661 0 0 3 0x40014200 idle1 67795 491972 0 0 3 0x14200 bored softnet 30553 153426 0 0 3 0x14200 bored systqmp 40757 84984 0 0 3 0x14200 bored systq 31473 354767 0 0 3 0x40014200 bored softclock 2477 503363 0 0 3 0x40014200 idle0 1 157894 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 97519 (syz-executor.0) thread 0xffff8000212d8020 (138261) shared rwlock vmmaplk r = 0 (0xfffffd807effe748) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5452 #3 uvm_map_pageable_all+0x56 sys/uvm/uvm_map.c:2576 #4 sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 #5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82882a90) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3fd sys/arch/amd64/amd64/trap.c:566 #2 Xsyscall+0x128 Process 80409 (syz-executor.1) thread 0xffff8000212d8ef0 (363189) exclusive rrwlock inode r = 0 (0xfffffd8065cf41b0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x135 sys/ufs/ffs/ffs_vfsops.c:1350 #5 ffs_inode_alloc+0x1e1 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:459 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3064 #9 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8065cf4700) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 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:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x5f7 sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3049 #8 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9467 6396K 6527K 78643K 10605 0 pcb 13 8K 8K 78643K 15 0 rtable 105 3K 3K 78643K 199 0 ifaddr 44 10K 10K 78643K 45 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1469 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1236 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 6 0K 0K 78643K 6 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 46016 0 proc 59 63K 95K 78643K 447 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 33 2K 2K 78643K 33 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 362 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 246 44K 44K 78643K 93834 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 6 0K 0K 78643K 10 0 temp 65 3951K 4015K 78643K 94016 0 kqueue 3 4K 5K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 318 0 308 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 78 0 78 1 1 0 1 0 8 0 tcpcb 592 10 0 6 1 0 1 1 0 8 0 inpcb 296 55 0 48 1 0 1 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 kcovpl 48 2 0 0 1 0 1 1 0 8 0 pffrag 232 11 0 11 2 2 0 1 0 482 0 pffrnode 88 11 0 11 2 2 0 1 0 8 0 pffrent 40 33 0 33 2 2 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 pfstitem 24 14 0 12 1 0 1 1 0 8 0 pfstkey 112 14 0 12 1 0 1 1 0 8 0 pfstate 328 14 0 12 2 1 1 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semapl 112 4 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 47407 0 46003 88 0 88 88 0 8 0 ffsino 272 47407 0 46003 95 1 94 94 0 8 0 nchpl 144 93666 0 92063 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 188387 0 188386 2 1 1 1 0 8 0 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 192 281068 0 281068 8 7 1 7 0 8 1 plimitpl 152 16 0 7 1 0 1 1 0 8 0 sigapl 424 46231 0 46200 4 0 4 4 0 8 0 futexpl 56 181439 0 181439 1 0 1 1 0 8 1 knotepl 112 66 0 46 1 0 1 1 0 8 0 kqueuepl 152 44036 0 44034 1 0 1 1 0 8 0 pipepl 304 80 0 69 2 1 1 2 0 8 0 fdescpl 496 46216 0 46200 3 0 3 3 0 8 0 filepl 152 91588 0 91486 6 1 5 5 0 8 1 lockfpl 104 18 0 16 1 0 1 1 0 8 0 lockfspl 48 10 0 8 1 0 1 1 0 8 0 sessionpl 120 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 53 0 44 1 0 1 1 0 8 0 zombiepl 144 46200 0 46200 2 1 1 1 0 8 1 processpl 1008 46231 0 46200 6 1 5 5 0 8 0 procpl 632 93117 0 93078 5 1 4 4 0 8 0 sockpl 400 392 0 373 7 5 2 3 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 34 0 0 2 0 2 2 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 327 0 0 38 10 28 38 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 551 0 0 21 0 21 21 0 8 0 bufpl 280 49479 0 43229 447 0 447 447 0 8 0 anonpl 16 2816571 0 2783445 137 3 134 134 0 124 0 amapchunkpl 152 141971 0 140899 43 1 42 42 0 158 0 amappl16 192 137042 0 136028 51 0 51 51 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 25 0 19 1 0 1 1 0 8 0 amappl13 168 18995 0 18994 1 0 1 1 0 8 0 amappl12 160 10 0 6 1 0 1 1 0 8 0 amappl11 152 62 0 44 1 0 1 1 0 8 0 amappl10 144 23032 0 23027 1 0 1 1 0 8 0 amappl9 136 371 0 370 1 0 1 1 0 8 0 amappl8 128 233 0 147 3 0 3 3 0 8 0 amappl7 120 246 0 238 1 0 1 1 0 8 0 amappl6 112 23103 0 23083 1 0 1 1 0 8 0 amappl5 104 46386 0 46368 1 0 1 1 0 8 0 amappl4 96 294 0 270 1 0 1 1 0 8 0 amappl3 88 17199 0 17192 1 0 1 1 0 8 0 amappl2 80 332901 0 332831 3 0 3 3 0 8 0 amappl1 72 1265827 0 1265341 25 15 10 19 0 8 0 amappl 80 93480 0 93329 4 0 4 4 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 46216 0 46200 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 46216 0 46200 1 0 1 1 0 8 0 vmmpekpl 168 191283 0 191252 2 0 2 2 0 8 0 vmmpepl 168 5669535 0 5667165 161 51 110 138 0 357 3 vmsppl 368 46215 0 46200 2 0 2 2 0 8 0 pdppl 4096 92439 0 92400 7 1 6 6 0 8 0 pvpl 32 8760615 0 8724323 297 4 293 293 0 265 0 pmappl 232 46215 0 46200 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 289 0 22 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd806da2a3d8,9,0) at witness_checkorder+0xf5a witness_debugger sys/kern/subr_witness.c:2490 [inline] witness_checkorder(fffffd806da2a3d8,9,0) at witness_checkorder+0xf5a sys/kern/subr_witness.c:1087 rw_enter(fffffd806da2a3c8,81) at rw_enter+0xd4 rrw_enter(fffffd806da2a3c8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462 VOP_LOCK(fffffd806d96cec0,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 vn_lock(fffffd806d96cec0,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575 uvn_io(fffffd806dd3eb48,ffff8000234e4e08,1,2,0) at uvn_io+0x2b5 sys/uvm/uvm_vnode.c:1196 uvn_get(fffffd806dd3eb48,6000,ffff8000234e5060,ffff8000234e4ffc,0,3) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1056 uvm_fault(fffffd807effe730,1b2e226000,2,3) at uvm_fault+0x1197 sys/uvm/uvm_fault.c:1016 uvm_fault_wire(fffffd807effe730,1b2e220000,1b2f220000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1285 uvm_map_pageable_wire(fffffd807effe730,fffffd8061928d48,0,35b,ffffffff818ce5a0,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367 sys_mlockall(ffff8000212d8020,ffff8000234e5238,ffff8000234e5280) at sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 syscall(ffff8000234e5300) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234e5300) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x204e90ddcf0, count: -14 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d80ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82882888) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82882888) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82882888,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:435 sleep_finish(ffff80002128a180,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff80002128a180,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff80002128a180,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff82821124,120,ffffffff823b3e3b,2) at tsleep+0x1c2 sys/kern/kern_synch.c:155 sys_nanosleep(ffff8000ffffec68,ffff80002128a2b0,ffff80002128a300) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff80002128a380) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002128a380) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:566 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00004df20, count: -12