´´´´kernel: protection fault trap, code=0 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace witness_checkorder(fffffd806d58d400,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2434 [inline] witness_checkorder(fffffd806d58d400,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:885 rw_enter(fffffd806d58d3f0,1) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250 rwsleep(fffffd806d58d530,fffffd806d58d3f0,118,ffffffff82616c93,0) at rwsleep+0x100 sys/kern/kern_synch.c:314 sosend(fffffd806d58d3e8,0,ffff80002478a118,0,0,0) at sosend+0x76e sys/kern/uipc_socket.c:614 fifo_write(ffff80002478a060) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd806c789e98,ffff80002478a118,3,fffffd807f7d7340) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002127d508,fffffd806c789e98,fffffd807f7d7340,ffff80002478a1e0,ffff80002478a1c0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrgenio(ffff80002127d508,18,0,ffff800000d15350,c) at ktrgenio+0x292 ktrwrite2 sys/kern/kern_ktrace.c:624 [inline] ktrgenio(ffff80002127d508,18,0,ffff800000d15350,c) at ktrgenio+0x292 sys/kern/kern_ktrace.c:259 dofilereadv(ffff80002127d508,18,ffff80002478a358,0,ffff80002478a440) at dofilereadv+0x2e3 sys/kern/sys_generic.c:263 sys_read(ffff80002127d508,ffff80002478a3f0,ffff80002478a440) at sys_read+0x83 sys/kern/sys_generic.c:167 syscall(ffff80002478a4c0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002478a4c0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2fb515740, count: -12 ddb{1}> show registers rdi 0xffffffff rsi 0xffffffff rbp 0xffff800024789dd0 rbx 0xffffffff rdx 0 rcx 0xc rax 0xfffffd8002fb0000 r8 0xffffffff81f63300 uvm_map_inentry_pc r9 0x1 r10 0x3160b35817dd43f1 r11 0x893bce4804bbb1f8 r12 0xfffffd8002f88300 r13 0xfffffd806d58d400 r14 0xdeafbeaddeafbead r15 0xffffffff82adcc30 w_locklistdata+0x42820 rip 0xffffffff81974615 witness_checkorder+0x4f5 cs 0x8 rflags 0x10216 __ALIGN_SIZE+0xf216 rsp 0xffff800024789d20 ss 0x10 witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> show proc PROC (syz-fuzzer) pid=205089 stat=onproc flags process=2 proc=4000001 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80002127ca88,0xffff80002127cfd8 process=0xffff8000ffff71f0 user=0xffff800024785000, vmspace=0xfffffd806f281738 estcpu=1, cpticks=5, pctcpu=0.6 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77844 358874 62268 0 3 0x80 nanoslp syz-executor.3 77844 126543 62268 0 2 0x4000081 syz-executor.3 44629 3779 15731 -1 3 0x90 nanoslp syz-executor.5 44629 477068 15731 -1 3 0x4000090 fsleep syz-executor.5 44629 475224 15731 -1 3 0x4000090 fsleep syz-executor.5 44629 337249 15731 -1 3 0x4000090 fsleep syz-executor.5 52563 73219 54968 0 2 0x83 syz-executor.1 19257 519978 54968 0 3 0x82 nanoslp syz-executor.6 36588 234280 0 0 3 0x14200 acct acct 15731 217252 54968 0 3 0x82 nanoslp syz-executor.5 61938 80424 54968 0 3 0x82 piperd syz-executor.0 56402 84180 54968 0 2 0x83 syz-executor.4 62268 466732 54968 0 3 0x82 nanoslp syz-executor.3 59830 37832 0 0 3 0x14280 nfsidl nfsio 17399 318650 0 0 3 0x14280 nfsidl nfsio 56388 24497 0 0 3 0x14280 nfsidl nfsio 22611 436260 0 0 3 0x14280 nfsidl nfsio 89121 61183 0 0 3 0x14280 nfsidl nfsio 98943 74739 0 0 3 0x14280 nfsidl nfsio 23436 520709 0 0 3 0x14280 nfsidl nfsio 83196 307802 0 0 3 0x14280 nfsidl nfsio 40638 323391 0 0 3 0x14280 nfsidl nfsio 13315 8105 0 0 3 0x14280 nfsidl nfsio 61311 333643 0 0 3 0x14280 nfsidl nfsio 60065 18827 0 0 3 0x14280 nfsidl nfsio 35456 42203 0 0 3 0x14280 nfsidl nfsio 64331 387097 0 0 3 0x14280 nfsidl nfsio 73506 487844 0 0 3 0x14280 nfsidl nfsio 79609 27000 0 0 3 0x14280 nfsidl nfsio 29589 78340 0 0 3 0x14280 nfsidl nfsio 50079 351706 0 0 3 0x14280 nfsidl nfsio 70090 268288 0 0 3 0x14280 nfsidl nfsio 46122 7000 0 0 3 0x14280 nfsidl nfsio 13682 265477 1 0 3 0x100083 ttyin getty 35726 251849 54968 0 3 0x82 piperd syz-executor.2 97098 189359 0 0 3 0x14200 bored sosplice 54968 278269 52688 0 3 0x82 thrsleep syz-fuzzer 54968 252966 52688 0 3 0x4000082 nanoslp syz-fuzzer 54968 27142 52688 0 3 0x4000082 thrsleep syz-fuzzer 54968 58873 52688 0 3 0x4000082 wait syz-fuzzer 54968 109390 52688 0 2 0x4000002 syz-fuzzer 54968 24034 52688 0 3 0x4000082 wait syz-fuzzer 54968 390782 52688 0 3 0x4000082 thrsleep syz-fuzzer 54968 212280 52688 0 3 0x4000082 thrsleep syz-fuzzer 54968 502383 52688 0 3 0x4000082 wait syz-fuzzer *54968 205089 52688 0 7 0x4000003 syz-fuzzer 54968 503072 52688 0 3 0x4000082 thrsleep syz-fuzzer 54968 337869 52688 0 2 0x4000083 syz-fuzzer 54968 310001 52688 0 3 0x4000082 wait syz-fuzzer 54968 343092 52688 0 3 0x4000082 wait syz-fuzzer 54968 103583 52688 0 3 0x4000082 wait syz-fuzzer 54968 296150 52688 0 3 0x4000082 wait syz-fuzzer 52688 253197 18360 0 3 0x10008a sigsusp ksh 18360 303197 22397 0 3 0x9a kqread sshd 22397 490187 1 0 3 0x88 kqread sshd 49262 325413 62526 74 3 0x1100092 bpf pflogd 62526 201278 1 0 3 0x80 netio pflogd 91134 242654 54448 73 3 0x1100010 ffs_fsync syslogd 54448 168930 1 0 3 0x100082 netio syslogd 65399 36679 1 0 3 0x100080 kqread resolvd 38192 15866 11411 77 3 0x100092 kqread dhcpleased 24498 2317 11411 77 3 0x100092 kqread dhcpleased 11411 481907 1 0 3 0x80 kqread dhcpleased 80568 75118 0 0 3 0x14200 bored smr 16125 149004 0 0 2 0x14200 zerothread 34750 254683 0 0 3 0x14200 aiodoned aiodoned 72286 125253 0 0 3 0x14200 syncer update 66213 466056 0 0 3 0x14200 cleaner cleaner 1218 386473 0 0 7 0x14200 reaper 97919 485743 0 0 3 0x14200 pgdaemon pagedaemon 89059 372890 0 0 3 0x14200 bored viomb 40266 213902 0 0 3 0x40014200 acpi0 acpi0 67505 79465 0 0 3 0x40014200 idle1 9494 168796 0 0 3 0x14200 bored softnet 74281 382360 0 0 3 0x14200 bored softnet 43608 384084 0 0 3 0x14200 bored softnet 88751 323402 0 0 3 0x14200 bored softnet 50723 520443 0 0 3 0x14200 bored systqmp 99131 468215 0 0 3 0x14200 bored systq 67093 42980 0 0 3 0x40014200 bored softclock 33186 229977 0 0 3 0x40014200 idle0 1 2103 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff82a31cf0) #0 witness_lock+0x44d #1 wakeup_n+0x37 #2 uvm_pmr_freepageq+0x292 sys/uvm/uvm_pmemrange.c:1352 #3 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523 #4 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351 #5 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #7 reaper+0x19a sys/kern/kern_exit.c:448 #8 proc_trampoline+0x1c exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82b9f2a8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_freepageq+0xcc sys/uvm/uvm_pmemrange.c:1333 #4 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523 #5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351 #6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #8 reaper+0x19a sys/kern/kern_exit.c:448 #9 proc_trampoline+0x1c Process 54968 (syz-fuzzer) thread 0xffff80002127d508 (205089) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b6b108) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:415 #3 sleep_finish+0x180 sys/kern/kern_synch.c:417 #4 rwsleep+0xd5 sys/kern/kern_synch.c:311 #5 sosend+0x76e sys/kern/uipc_socket.c:614 #6 fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 #7 VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 #8 ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 #9 ktrgenio+0x292 ktrwrite2 sys/kern/kern_ktrace.c:624 [inline] #9 ktrgenio+0x292 sys/kern/kern_ktrace.c:259 #10 dofilereadv+0x2e3 sys/kern/sys_generic.c:263 #11 sys_read+0x83 sys/kern/sys_generic.c:167 #12 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #12 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 Process 91134 (syslogd) thread 0xffff800021279cf0 (242654) exclusive rrwlock inode r = 0 (0xfffffd806e7d24e0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0xf5 sys/kern/vfs_syscalls.c:2935 #6 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #6 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 1218 (reaper) thread 0xffff800021233508 (386473) exclusive rwlock amaplk r = 0 (0xfffffd8067a32d70) #0 witness_lock+0x44d #1 amap_unref+0x2b sys/uvm/uvm_amap.c:1363 #2 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351 #3 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 #4 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 #5 reaper+0x19a sys/kern/kern_exit.c:448 #6 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10225 6563K 7002K 78643K 16792 0 pcb 13 14K 16K 78643K 656 0 rtable 177 15K 21K 78643K 994 0 ifaddr 88 17K 20K 78643K 427 0 sysctl 2 0K 0K 78643K 2 0 counters 54 35K 35K 78643K 144 0 ioctlops 0 0K 4K 78643K 2954 0 iov 0 0K 32K 78643K 777 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1398 87K 88K 78643K 3286 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 45 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 366 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 85K 78643K 3865 0 sigio 0 0K 0K 78643K 64 0 proc 71 103K 140K 78643K 1073 0 subproc 91 5K 6K 78643K 273 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 216 0 in_multi 64 4K 6K 78643K 314 0 ether_multi 1 0K 0K 78643K 12 0 mrt 1 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 211 943K 943K 78643K 211 0 exec 0 0K 2K 78643K 1555 0 pfkey data 0 0K 1K 78643K 5 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 62K 78643K 8 0 UVM amap 312 305K 314K 78643K 24686 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 123 0 NDP 14 0K 2K 78643K 100 0 temp 145 4722K 5746K 78643K 44384 0 kqueue 12 18K 26K 78643K 298 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 440 0 437 10 5 5 5 0 8 4 rtentry 112 285 0 213 4 0 4 4 0 8 0 unpcb 144 2403 0 2386 32 23 9 10 0 8 8 syncache 296 33 0 33 7 6 1 1 0 8 1 tcpqe 32 551 0 551 5 5 0 2 0 8 0 tcpcb 768 5783 0 5743 140 130 10 29 0 8 5 arp 120 46 0 33 1 0 1 1 0 8 0 inpcb 368 8013 0 8004 75 65 10 19 0 8 8 nd6 48 67 0 52 1 0 1 1 0 8 0 pkpcb 40 21 0 21 3 3 0 1 0 8 0 kcovpl 48 21 0 14 1 0 1 1 0 8 0 ppxss 1256 24 0 24 6 5 1 1 0 8 1 pfstscr 40 77 0 77 4 4 0 1 0 8 0 pffrag 232 44 0 40 3 2 1 1 0 482 0 pffrnode 88 44 0 40 3 2 1 1 0 8 0 pffrent 40 94 0 90 3 2 1 1 0 8 0 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 716 21 0 21 21 0 8 0 pfrktable 1344 63 0 63 2 2 0 2 0 8 0 pfanchor 1280 290 0 57 20 0 20 20 0 8 0 pftag 88 7 0 5 1 0 1 1 0 8 0 pfstitem 24 50 0 48 1 0 1 1 0 8 0 pfstkey 120 204 0 202 1 0 1 1 0 8 0 pfstate 336 127 0 125 3 2 1 3 0 8 0 pfrule 1360 175 0 174 4 3 1 3 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1296 0 983 37 12 25 30 0 8 2 art_table 32 1298 0 983 4 0 4 4 0 8 0 art_node 16 284 0 222 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 364 0 354 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6597 0 5153 91 0 91 91 0 8 0 ffsino 272 6597 0 5153 97 0 97 97 0 8 0 nchpl 144 11677 0 10036 63 0 63 63 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 41843 0 41843 3 2 1 2 0 8 1 percpumem 16 84 0 45 1 0 1 1 0 8 0 vcpupl 2048 79 0 0 10 0 10 10 0 8 0 vmpool 568 83 0 4 6 0 6 6 0 8 0 pfiaddrpl 120 25 0 25 1 1 0 1 0 8 0 kstatmem 264 110 0 82 3 0 3 3 0 8 0 scxspl 216 31855 0 31854 13 12 1 8 0 8 0 plimitpl 152 508 0 494 1 0 1 1 0 8 0 sigapl 424 4166 0 4102 10 2 8 8 0 8 0 futexpl 64 33579 0 33576 1 0 1 1 0 8 0 knotepl 120 482 0 0 13 0 13 13 0 8 0 kqueuepl 216 707 0 699 13 8 5 5 0 8 4 pipepl 320 835 0 810 24 18 6 8 0 8 3 fdescpl 496 4127 0 4103 6 2 4 5 0 8 0 filepl 152 29191 0 28971 57 39 18 19 0 8 8 lockfpl 104 1121 0 1119 4 2 2 2 0 8 1 lockfspl 48 372 0 370 1 0 1 1 0 8 0 sessionpl 144 39 0 23 1 0 1 1 0 8 0 pgrppl 48 56 0 40 1 0 1 1 0 8 0 ucredpl 104 3833 0 3820 1 0 1 1 0 8 0 zombiepl 144 4103 0 4102 3 2 1 1 0 8 0 processpl 1064 4166 0 4102 5 0 5 5 0 8 0 procpl 672 11316 0 11233 15 6 9 10 0 8 0 srpgc 96 30 0 30 6 5 1 1 0 8 1 sosppl 168 27 0 27 6 5 1 1 0 8 1 sockpl 488 10877 0 10848 182 157 25 35 0 8 20 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 49 0 0 6 2 4 6 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 518 0 0 64 0 64 64 0 8 0 mtagpl 96 348 0 0 6 0 6 6 0 8 0 mbufpl 256 925 0 0 56 1 55 55 0 8 0 bufpl 288 8975 0 2640 453 0 453 453 0 8 0 anonpl 24 817031 0 802533 152 33 119 135 0 186 0 amapchunkpl 152 69548 0 68858 46 13 33 37 0 158 0 amappl16 200 11404 0 10840 69 32 37 43 0 8 5 amappl15 192 658 0 651 1 0 1 1 0 8 0 amappl14 184 155 0 152 1 0 1 1 0 8 0 amappl13 176 1153 0 1150 1 0 1 1 0 8 0 amappl12 168 828 0 822 1 0 1 1 0 8 0 amappl11 160 379 0 360 1 0 1 1 0 8 0 amappl10 152 372 0 366 1 0 1 1 0 8 0 amappl9 144 545 0 540 1 0 1 1 0 8 0 amappl8 136 1456 0 1382 3 0 3 3 0 8 0 amappl7 128 795 0 771 1 0 1 1 0 8 0 amappl6 120 338 0 325 2 1 1 2 0 8 0 amappl5 112 3371 0 3351 1 0 1 1 0 8 0 amappl4 104 1780 0 1753 2 1 1 2 0 8 0 amappl3 96 12730 0 12680 3 1 2 2 0 8 0 amappl2 88 2030 0 1989 3 2 1 2 0 8 0 amappl1 80 103977 0 103369 24 8 16 20 0 8 0 amappl 88 23882 0 23696 7 2 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 4210 0 4107 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4210 0 4107 1 0 1 1 0 8 0 vmmpekpl 168 36395 0 36315 4 0 4 4 0 8 0 vmmpepl 168 409068 0 406459 183 45 138 147 0 357 0 vmsppl 368 4209 0 4106 12 2 10 10 0 8 0 rwobjpl 56 107450 0 99797 120 8 112 112 0 8 0 pdppl 4096 8427 0 8291 374 226 148 148 0 8 12 pvpl 32 1644296 0 1625770 309 117 192 259 0 265 0 pmappl 248 4209 0 4106 8 1 7 7 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1306 0 322 29 0 29 29 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82940ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_cmp4(3ef7c1,3ef7c1) at __sanitizer_cov_trace_cmp4+0x2a kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_cmp4(3ef7c1,3ef7c1) at __sanitizer_cov_trace_cmp4+0x2a sys/dev/kcov.c:201 __mp_lock(ffffffff82a31ae8) at __mp_lock+0x62 __mp_lock_held sys/kern/kern_lock.c:236 [inline] __mp_lock(ffffffff82a31ae8) at __mp_lock+0x62 sys/kern/kern_lock.c:137 wakeup_n(ffffffff82b9f100,ffffffff) at wakeup_n+0xc5 wakeup_proc sys/kern/kern_synch.c:478 [inline] wakeup_n(ffffffff82b9f100,ffffffff) at wakeup_n+0xc5 sys/kern/kern_synch.c:551 uvm_pmr_freepageq(ffff8000212395c8) at uvm_pmr_freepageq+0x292 sys/uvm/uvm_pmemrange.c:1352 amap_wipeout(fffffd8068afa1a0) at amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523 uvm_unmap_detach(ffff800021239690,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1351 uvm_map_teardown(fffffd807effd2e0) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2541 uvmspace_free(fffffd807effd2e0) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3436 reaper(ffff800021233508) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -12 ddb{0}> machine ddbcpu 1 Stopped at witness_checkorder+0x4f5: movl 0x10(%r14),%ecx ddb{1}> trace witness_checkorder(fffffd806d58d400,9,0) at witness_checkorder+0x4f5 witness_lock_order_check sys/kern/subr_witness.c:2434 [inline] witness_checkorder(fffffd806d58d400,9,0) at witness_checkorder+0x4f5 sys/kern/subr_witness.c:885 rw_enter(fffffd806d58d3f0,1) at rw_enter+0xd1 sys/kern/kern_rwlock.c:250 rwsleep(fffffd806d58d530,fffffd806d58d3f0,118,ffffffff82616c93,0) at rwsleep+0x100 sys/kern/kern_synch.c:314 sosend(fffffd806d58d3e8,0,ffff80002478a118,0,0,0) at sosend+0x76e sys/kern/uipc_socket.c:614 fifo_write(ffff80002478a060) at fifo_write+0x7c sys/miscfs/fifofs/fifo_vnops.c:281 VOP_WRITE(fffffd806c789e98,ffff80002478a118,3,fffffd807f7d7340) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002127d508,fffffd806c789e98,fffffd807f7d7340,ffff80002478a1e0,ffff80002478a1c0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrgenio(ffff80002127d508,18,0,ffff800000d15350,c) at ktrgenio+0x292 ktrwrite2 sys/kern/kern_ktrace.c:624 [inline] ktrgenio(ffff80002127d508,18,0,ffff800000d15350,c) at ktrgenio+0x292 sys/kern/kern_ktrace.c:259 dofilereadv(ffff80002127d508,18,ffff80002478a358,0,ffff80002478a440) at dofilereadv+0x2e3 sys/kern/sys_generic.c:263 sys_read(ffff80002127d508,ffff80002478a3f0,ffff80002478a440) at sys_read+0x83 sys/kern/sys_generic.c:167 syscall(ffff80002478a4c0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002478a4c0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2fb515740, count: -12