witness: lock_object uninitialized: 0xffff800000d88028 Starting stack trace... witness_checkorder(ffff800000d88028,9,0) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000d88028,9,0) at witness_checkorder+0x137 sys/kern/subr_witness.c:777 rw_enter_write(ffff800000d88018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000d88000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000d88000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff2a00) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff8000211d98f0,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:220 sys_exit(ffff8000211d98f0,ffff80002129d310,ffff80002129d360) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002129d3e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002129d3e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ffda9ef0b30, count: 249 End of stack trace. Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800000d88028,9,0) at witness_checkorder+0x13c witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000d88028,9,0) at witness_checkorder+0x13c sys/kern/subr_witness.c:777 rw_enter_write(ffff800000d88018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000d88000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000d88000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff2a00) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff8000211d98f0,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:220 sys_exit(ffff8000211d98f0,ffff80002129d310,ffff80002129d360) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002129d3e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002129d3e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ffda9ef0b30, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002129d0b0 rbx 0x3 rdx 0 rcx 0xffff8000211d98f0 rax 0xffff800020d58ff0 r8 0xffff80002129d050 r9 0x8080808080808080 r10 0x236e30ae8444880 r11 0x6cf4a160176c9d2e r12 0xffff800000d88001 r13 0xffff800000d88028 r14 0 r15 0 rip 0xffffffff8255bacc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002129d0a0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.3) pid=415657 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000211d90c8,0xffff8000211d9390 process=0xffff8000ffff2a00 user=0xffff800021298000, vmspace=0xfffffd806512e930 estcpu=36, cpticks=33, pctcpu=0.0 user=0, sys=9, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16796 330366 57837 0 2 0 syz-executor.5 3714 1781 27149 0 2 0 syz-executor.2 45979 64407 17439 0 2 0 syz-executor.6 45979 128330 17439 0 3 0x4000080 kqpoll syz-executor.6 45979 188650 17439 0 2 0x4000000 syz-executor.6 45979 200558 17439 0 3 0x4000080 kqpoll syz-executor.6 33151 441131 0 0 3 0x14200 acct acct 62048 334986 49947 0 2 0x2 syz-executor.4 21587 108203 49947 0 2 0x2 syz-executor.0 89804 5885 0 0 3 0x14280 nfsidl nfsio 39820 86969 0 0 3 0x14280 nfsidl nfsio 69491 201947 0 0 3 0x14280 nfsidl nfsio 90710 276387 0 0 3 0x14280 nfsidl nfsio 14229 400801 0 0 3 0x14280 nfsidl nfsio 4406 215725 0 0 3 0x14280 nfsidl nfsio 30694 45822 0 0 3 0x14280 nfsidl nfsio 16272 99724 0 0 3 0x14280 nfsidl nfsio 46637 366097 0 0 3 0x14280 nfsidl nfsio 17806 431655 0 0 3 0x14280 nfsidl nfsio 7858 373903 0 0 3 0x14280 nfsidl nfsio 8001 276555 0 0 3 0x14280 nfsidl nfsio 11041 134480 0 0 3 0x14280 nfsidl nfsio 20648 81126 0 0 3 0x14280 nfsidl nfsio 41775 177989 0 0 3 0x14280 nfsidl nfsio 70788 187159 0 0 3 0x14280 nfsidl nfsio 82279 399156 0 0 3 0x14280 nfsidl nfsio 98862 484297 0 0 3 0x14280 nfsidl nfsio 37857 147206 0 0 3 0x14280 nfsidl nfsio 91266 241314 0 0 3 0x14280 nfsidl nfsio 73380 74808 0 0 3 0x14200 bored sosplice 71435 249788 49947 0 3 0x82 nanoslp syz-executor.7 17439 257706 49947 0 3 0x82 nanoslp syz-executor.6 57837 225217 49947 0 3 0x82 nanoslp syz-executor.5 21822 178754 49947 0 3 0x82 nanoslp syz-executor.3 27149 417948 49947 0 3 0x82 nanoslp syz-executor.2 47079 20556 49947 0 2 0x2 syz-executor.1 49947 473526 69857 0 3 0x2000082 thrsleep syz-fuzzer 49947 182142 69857 0 3 0x6000082 thrsleep syz-fuzzer 49947 49168 69857 0 3 0x6000082 thrsleep syz-fuzzer 49947 404914 69857 0 3 0x6000082 wait syz-fuzzer 49947 419309 69857 0 3 0x6000082 kqread syz-fuzzer 49947 171576 69857 0 3 0x6000082 wait syz-fuzzer 49947 328847 69857 0 3 0x6000082 wait syz-fuzzer 49947 519828 69857 0 3 0x6000082 thrsleep syz-fuzzer 49947 293836 69857 0 3 0x6000082 thrsleep syz-fuzzer 49947 218135 69857 0 3 0x6000082 thrsleep syz-fuzzer 49947 103925 69857 0 3 0x6000082 wait syz-fuzzer 49947 495094 69857 0 3 0x6000082 wait syz-fuzzer 49947 498579 69857 0 3 0x6000082 wait syz-fuzzer 49947 470323 69857 0 3 0x6000082 wait syz-fuzzer 49947 142595 69857 0 3 0x6000082 wait syz-fuzzer 49947 232449 69857 0 3 0x6000082 thrsleep syz-fuzzer 69857 464168 93135 0 3 0x10008a sigsusp ksh 93135 480725 35598 0 3 0x9a kqread sshd 49322 271265 1 0 3 0x100083 ttyopn getty 35598 97404 1 0 3 0x88 kqread sshd 60592 443323 40749 74 3 0x1100092 bpf pflogd 40749 481496 1 0 3 0x80 netio pflogd 17619 387155 38653 73 3 0x1100090 kqread syslogd 38653 240547 1 0 3 0x100082 netio syslogd 85826 175203 1 0 3 0x100080 kqread resolvd 30073 444727 15095 77 3 0x100092 kqread dhcpleased 89889 418417 15095 77 3 0x100092 kqread dhcpleased 15095 250519 1 0 3 0x80 kqread dhcpleased 5959 301613 0 0 3 0x14200 bored smr 55443 364855 0 0 2 0x14200 zerothread 2746 324161 0 0 3 0x14200 aiodoned aiodoned 69754 401897 0 0 3 0x14200 syncer update 47450 125211 0 0 3 0x14200 cleaner cleaner 76485 237078 0 0 7 0x14200 reaper 16227 18851 0 0 3 0x14200 pgdaemon pagedaemon 36111 106779 0 0 3 0x14200 bored viomb 96844 456213 0 0 3 0x40014200 acpi0 acpi0 32809 288024 0 0 3 0x40014200 idle1 41375 324068 0 0 3 0x14200 bored softnet3 1885 431673 0 0 3 0x14200 bored softnet2 77194 35630 0 0 3 0x14200 bored softnet1 61284 379746 0 0 3 0x14200 bored softnet0 24115 53042 0 0 3 0x14200 bored systqmp 42390 337069 0 0 3 0x14200 bored systq 70745 498801 0 0 3 0x40014200 bored softclock 35390 212959 0 0 3 0x40014200 idle0 1 67081 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 45979 (syz-executor.6) thread 0xffff8000211d8330 (188650) exclusive rwlock futex r = 0 (0xffffffff82c0ab40) #0 witness_lock+0x447 #1 sys_futex+0x60 sys/kern/sys_futex.c:98 #2 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #2 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #3 Xsyscall+0x128 Process 62048 (syz-executor.4) thread 0xffff800021290de8 (334986) exclusive rwlock vmmaplk r = 0 (0xfffffd806512e688) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0x3b sys/uvm/uvm_map.c:3894 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 Process 21587 (syz-executor.0) thread 0xffff8000212ad368 (108203) exclusive rwlock vmmaplk r = 0 (0xfffffd8075bcca18) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0xb6 sys/uvm/uvm_map.c:3903 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd806512e118) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0x3b sys/uvm/uvm_map.c:3894 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 Process 47079 (syz-executor.1) thread 0xffff80002121e590 (20556) exclusive rwlock vmmaplk r = 0 (0xfffffd8075bcc2d8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0xb6 sys/uvm/uvm_map.c:3903 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd8075bcc678) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0x3b sys/uvm/uvm_map.c:3894 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 Process 76485 (reaper) thread 0xffff8000211ac2c0 (237078) exclusive rwlock kmmaplk r = 0 (0xffffffff82d63c90) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvm_unmap+0x7c sys/uvm/uvm_map.c:1855 #4 uvm_uarea_free+0x39 sys/uvm/uvm_glue.c:288 #5 reaper+0x168 sys/kern/kern_exit.c:438 #6 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 6477K 7571K 78643K 11794 0 pcb 13 10K 12K 78643K 123 0 rtable 239 7K 7K 78643K 450 0 pf 34 9K 10K 78643K 87 0 ifaddr 46 15K 15K 78643K 73 0 ifgroup 57 2K 2K 78643K 119 0 sysctl 2 0K 0K 78643K 5 0 counters 62 36K 36K 78643K 96 0 ioctlops 0 0K 4K 78643K 1496 0 iov 0 0K 16K 78643K 51 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1385 87K 87K 78643K 1707 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 3 5K 9K 78643K 24 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 225 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 85K 78643K 1695 0 sigio 0 0K 0K 78643K 11 0 proc 74 115K 115K 78643K 718 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 105 0 in_multi 99 7K 7K 78643K 141 0 ether_multi 1 0K 0K 78643K 2 0 mrt 1 0K 0K 78643K 3 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 684 0 pfkey data 0 0K 0K 78643K 3 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 64K 78643K 10 0 UVM amap 349 88K 90K 78643K 19570 0 UVM aobj 65 3K 4K 78643K 71 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 23 0 NDP 13 0K 1K 78643K 50 0 temp 74 5920K 5990K 78643K 9651 0 kqueue 12 18K 24K 78643K 181 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 78 0 75 1 0 1 1 0 8 0 rtentry 112 136 0 25 4 0 4 4 0 8 0 unpcb 144 1270 0 1255 13 12 1 6 0 8 0 syncache 296 12 0 12 4 3 1 1 0 8 1 tcpqe 32 385 0 385 4 3 1 1 0 8 1 tcpcb 808 305 0 298 14 11 3 7 0 8 2 arp 120 23 0 4 1 0 1 1 0 8 0 inpcb 368 688 0 676 16 12 4 7 0 8 2 nd6 136 32 0 8 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1256 8 0 7 1 0 1 1 0 8 0 pffrag 232 4 0 2 1 0 1 1 0 482 0 pffrnode 88 4 0 2 1 0 1 1 0 8 0 pffrent 40 15 0 13 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 114 0 94 1 0 1 1 0 8 0 pfstkey 128 114 0 94 2 0 2 2 0 8 0 pfstate 376 114 0 94 6 2 4 5 0 8 0 pfrule 1344 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 256 553 0 97 29 0 29 29 0 8 0 art_table 32 554 0 97 4 0 4 4 0 8 0 art_node 16 135 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 3 2 1 1 1 0 8 0 semapl 112 223 0 213 1 0 1 1 0 8 0 shmpl 112 68 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3627 0 2176 91 0 91 91 0 8 0 ffsino 272 3627 0 2176 97 0 97 97 0 8 0 nchpl 144 6168 0 5667 63 40 23 63 0 8 0 uvmvnodes 80 3976 0 0 82 0 82 82 0 8 0 vnodes 216 3976 0 0 221 0 221 221 0 8 0 namei 1024 20624 0 20624 7 6 1 2 0 8 1 percpumem 16 61 0 17 1 0 1 1 0 8 0 kstatmem 264 60 0 34 2 0 2 2 0 8 0 scxspl 216 19218 0 19217 12 11 1 8 1 8 0 plimitpl 152 219 0 203 1 0 1 1 0 8 0 sigapl 424 2024 0 1954 9 1 8 8 0 8 0 futexpl 64 12213 0 12212 1 0 1 1 0 8 0 knotepl 120 821 0 0 24 0 24 24 0 8 0 kqueuepl 216 462 0 452 7 6 1 5 0 8 0 pipepl 320 450 0 422 7 4 3 6 0 8 0 fdescpl 496 1985 0 1956 5 0 5 5 0 8 0 filepl 152 10502 0 10263 23 12 11 15 0 8 1 lockfpl 104 437 0 434 1 0 1 1 0 8 0 lockfspl 48 151 0 148 1 0 1 1 0 8 0 sessionpl 144 26 0 9 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 1338 0 1326 1 0 1 1 0 8 0 zombiepl 144 2681 0 2679 2 1 1 1 0 8 0 processpl 1072 2024 0 1954 5 0 5 5 0 8 0 procpl 696 5058 0 4968 16 6 10 10 0 8 0 sosppl 168 15 0 15 2 2 0 1 0 8 0 sockpl 488 2042 0 2014 59 52 7 21 0 8 3 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 11 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 298 0 0 36 0 36 36 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1245 0 0 76 0 76 76 0 8 0 bufpl 288 6524 0 200 453 1 452 452 0 8 0 anonpl 24 347718 0 335068 139 52 87 128 0 186 0 amapchunkpl 152 61927 0 61082 47 8 39 40 0 158 1 amappl16 200 8897 0 8558 54 34 20 43 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 196 0 180 2 1 1 2 0 8 0 amappl13 176 15 0 15 1 1 0 1 0 8 0 amappl12 168 2672 0 2643 3 1 2 2 0 8 0 amappl11 160 62 0 48 1 0 1 1 0 8 0 amappl10 152 34 0 21 1 0 1 1 0 8 0 amappl9 144 199 0 198 1 0 1 1 0 8 0 amappl8 136 258 0 177 3 0 3 3 0 8 0 amappl7 128 80 0 64 2 1 1 2 0 8 0 amappl6 120 288 0 262 2 1 1 2 0 8 0 amappl5 112 191 0 180 1 0 1 1 0 8 0 amappl4 104 613 0 567 4 2 2 3 0 8 0 amappl3 96 12546 0 12470 4 1 3 3 0 8 0 amappl2 88 2294 0 2226 3 1 2 3 0 8 0 amappl1 80 15712 0 15163 24 11 13 23 0 8 0 amappl 88 18947 0 18719 7 0 7 7 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 70 0 6 2 0 2 2 0 8 0 uaddrrnd 24 1984 0 1955 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1984 0 1955 1 0 1 1 0 8 0 vmmpekpl 168 21783 0 21707 4 0 4 4 0 8 0 vmmpepl 168 141357 0 139126 164 58 106 125 0 357 0 vmsppl 464 1984 0 1955 5 1 4 5 0 8 0 rwobjpl 56 46417 0 40921 86 8 78 78 0 8 0 pdppl 4096 3978 0 3910 184 114 70 80 0 8 2 pvpl 32 843202 0 824625 421 251 170 367 0 265 0 pmappl 248 1984 0 1955 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1019 0 146 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82b97ff0) at x86_ipi_db+0x1e 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+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x25 sys/dev/kcov.c:158 __mp_lock(ffffffff82c77498) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c77498) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82c77498,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x4c6 sys/kern/sched_bsd.c:470 yield() at yield+0x5b sys/kern/sched_bsd.c:324 pool_get(ffffffff82d376a8,1) at pool_get+0x19d sys/kern/subr_pool.c:589 uvm_mapent_alloc(ffffffff82d63b98,0) at uvm_mapent_alloc+0x2ff sys/uvm/uvm_map.c:1542 uvm_map_clip_start(ffffffff82d63b98,fffffd8066979d38,ffff80002e45c000) at uvm_map_clip_start+0x9b sys/uvm/uvm_map.c:4722 uvm_unmap_remove(ffffffff82d63b98,ffff80002e45c000,ffff80002e462000,ffff8000211b9260,0,1,25414a9288b4aaac) at uvm_unmap_remove+0x3a1 uvm_unmap(ffffffff82d63b98,ffff80002e45c000,ffff80002e462000) at uvm_unmap+0x9d vm_map_unlock_ln sys/uvm/uvm_map.c:5379 [inline] uvm_unmap(ffffffff82d63b98,ffff80002e45c000,ffff80002e462000) at uvm_unmap+0x9d sys/uvm/uvm_map.c:1856 uvm_uarea_free(ffff8000211d85e8) at uvm_uarea_free+0x39 sys/uvm/uvm_glue.c:288 reaper(ffff8000211ac2c0) at reaper+0x168 sys/kern/kern_exit.c:438 end trace frame: 0x0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800000d88028,9,0) at witness_checkorder+0x13c witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000d88028,9,0) at witness_checkorder+0x13c sys/kern/subr_witness.c:777 rw_enter_write(ffff800000d88018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000d88000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000d88000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff8000ffff2a00) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff8000211d98f0,0,0,1) at exit1+0x3d5 sys/kern/kern_exit.c:220 sys_exit(ffff8000211d98f0,ffff80002129d310,ffff80002129d360) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002129d3e0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002129d3e0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ffda9ef0b30, count: -9