witness: lock order reversal: 1st 0xffffffff8290fe50 netlock (netlock) 2nd 0xfffffd80665d95f0 vmmaplk (&map->lock) lock order "&map->lock"(rwlock) -> "netlock"(rwlock) first seen at: #0 rw_enter_write+0x5b sys/kern/kern_rwlock.c:128 #1 udp_sysctl+0x8a sys/netinet/udp_usrreq.c:1269 #2 sys_sysctl+0x209 sys/kern/kern_sysctl.c:249 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 lock order "netlock"(rwlock) -> "&map->lock"(rwlock) first seen at: #0 rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 kpageflttrap+0x209 #5 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x53 #8 ifioctl_get+0x2dd #9 soo_ioctl+0x26c #10 sys_ioctl+0x4a2 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 Stopped at db_enter+0x18: 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+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(fffffd80665d95f0,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd80665d95f0,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd80665d95e0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800029532df0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff800029532df0,ffff800029532e28,ffff800029532e50) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd80665d95d8,20000000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff800029532f80,20000300) at kpageflttrap+0x209 kerntrap(ffff800029532f80) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 ifioctl_get(c0106924,ffff800029533230) at ifioctl_get+0x2dd soo_ioctl(fffffd8073d69448,c0106924,ffff800029533230,ffff800027eda2a8) at soo_ioctl+0x26c sys_ioctl(ffff800027eda2a8,ffff800029533348,ffff8000295333a0) at sys_ioctl+0x4a2 syscall(ffff800029533410) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800029533410) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3703f113a60, count: -15 ddb{1}> show registers rdi 0x3 rsi 0xffffffff8294abb0 __sancov_gen_cov_switch_values.134 rbp 0xffff800029532ae0 rbx 0x3 rdx 0 rcx 0 rax 0xffff800027eda2a8 r8 0xffff800029532a50 r9 0x8080808080808080 r10 0x5895a93ad6f5b19a r11 0x3b21ceec2e5e96b1 r12 0xffffffff82ab0900 w_lodata+0x52f90 r13 0 r14 0xffffffff82aa41a0 w_lodata+0x46830 r15 0xfffffd8002f62d80 rip 0xffffffff8138d658 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800029532ad0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=153472 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800027edba48,0xffff800027edb278 process=0xffff800028701d38 user=0xffff80002952e000, vmspace=0xfffffd80665d95d8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79246 425150 97552 32767 2 0x10 syz-executor.7 17336 156785 97561 32767 7 0x10 syz-executor.1 *17336 153472 97561 32767 7 0x4000010 syz-executor.1 17336 68788 97561 32767 2 0x4000010 syz-executor.1 17336 290702 97561 32767 2 0x4000010 syz-executor.1 17336 208457 97561 32767 2 0x4000010 syz-executor.1 25977 361502 64742 32767 2 0x10 syz-executor.4 25977 151306 64742 32767 3 0x4000090 fsleep syz-executor.4 25977 435387 64742 32767 2 0x4000010 syz-executor.4 10256 371682 78172 32767 2 0x10 syz-executor.3 6046 313526 79181 32767 2 0x10 syz-executor.0 6046 297945 79181 32767 3 0x4000090 fsleep syz-executor.0 11213 377982 0 0 3 0x14200 bored sosplice 69022 93390 89584 32767 3 0x90 nanoslp syz-executor.5 97552 384308 60146 32767 3 0x90 nanoslp syz-executor.7 31201 206969 61704 32767 3 0x10 biowait syz-executor.6 60146 506030 41467 0 3 0x82 wait syz-executor.7 64742 427648 87165 32767 3 0x90 nanoslp syz-executor.4 61704 62564 41467 0 3 0x82 wait syz-executor.6 89584 187533 41467 0 3 0x82 wait syz-executor.5 78172 418621 64697 32767 3 0x90 nanoslp syz-executor.3 90677 208975 63976 32767 3 0x10 biowait syz-executor.2 87165 48385 41467 0 3 0x82 wait syz-executor.4 64697 501072 41467 0 3 0x82 wait syz-executor.3 63976 419750 41467 0 3 0x82 wait syz-executor.2 79181 68509 14721 32767 3 0x90 nanoslp syz-executor.0 97561 19697 92400 32767 3 0x90 nanoslp syz-executor.1 92400 240875 41467 0 3 0x82 wait syz-executor.1 14721 157178 41467 0 3 0x82 wait syz-executor.0 41467 49508 3519 0 3 0x82 thrsleep syz-fuzzer 41467 492667 3519 0 3 0x4000082 nanoslp syz-fuzzer 41467 388464 3519 0 3 0x4000082 kqread syz-fuzzer 41467 183076 3519 0 3 0x4000082 thrsleep syz-fuzzer 41467 430954 3519 0 3 0x4000082 thrsleep syz-fuzzer 41467 149146 3519 0 3 0x4000082 thrsleep syz-fuzzer 41467 159616 3519 0 3 0x4000082 thrsleep syz-fuzzer 41467 396636 3519 0 3 0x4000082 thrsleep syz-fuzzer 41467 10282 3519 0 3 0x4000082 thrsleep syz-fuzzer 3519 487356 86977 0 3 0x10008a sigsusp ksh 86977 263554 827 0 3 0x9a kqread sshd 95751 236509 1 0 3 0x100083 ttyin getty 827 382879 1 0 3 0x88 kqread sshd 28299 482387 85215 73 3 0x1100090 kqread syslogd 85215 519037 1 0 3 0x100082 netio syslogd 96459 456823 1 0 3 0x100080 kqread resolvd 29219 57493 36778 77 3 0x100092 kqread dhcpleased 34672 201264 36778 77 3 0x100092 kqread dhcpleased 36778 314246 1 0 3 0x80 kqread dhcpleased 55155 185565 0 0 3 0x14200 bored smr 34175 39855 0 0 2 0x14200 zerothread 86381 274404 0 0 3 0x14200 aiodoned aiodoned 34174 521428 0 0 3 0x14200 syncer update 25912 92319 0 0 3 0x14200 cleaner cleaner 7982 39611 0 0 3 0x14200 reaper reaper 33390 465092 0 0 3 0x14200 pgdaemon pagedaemon 84812 193475 0 0 3 0x14200 bored viomb 8993 388045 0 0 3 0x40014200 acpi0 acpi0 65094 1389 0 0 3 0x40014200 idle1 9749 120461 0 0 3 0x14200 bored softnet 74927 458759 0 0 3 0x14200 bored systqmp 20344 161934 0 0 3 0x14200 bored systq 97974 52122 0 0 3 0x40014200 bored softclock 40517 129396 0 0 3 0x40014200 idle0 1 230631 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 17336 (syz-executor.1) thread 0xffff800027eda2a8 (153472) shared rwlock netlock r = 0 (0xffffffff8290fe50) #0 witness_lock+0x44d #1 ifioctl_get+0x2d5 sys/net/if.c:2319 #2 soo_ioctl+0x26c #3 sys_ioctl+0x4a2 #4 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829de988) #0 witness_lock+0x44d #1 soo_ioctl+0x25a sys/kern/sys_socket.c:136 #2 sys_ioctl+0x4a2 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 31201 (syz-executor.6) thread 0xffff80002466a548 (206969) exclusive rrwlock inode r = 0 (0xfffffd806e531a30) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80661e20a0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 90677 (syz-executor.2) thread 0xffff8000ffff67f0 (208975) exclusive rrwlock inode r = 0 (0xfffffd806e5311b0) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3101 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068ff31a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3086 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10176 6407K 6419K 78643K 11266 0 pcb 13 8K 8K 78643K 13 0 rtable 242 7K 7K 78643K 386 0 ifaddr 81 16K 16K 78643K 82 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 46 0 iov 0 0K 12K 78643K 92 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 1407 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 118 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 235 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 125K 78643K 5846 0 sigio 0 0K 0K 78643K 74 0 proc 56 74K 123K 78643K 502 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 52 0 in_multi 99 6K 7K 78643K 135 0 ether_multi 1 0K 0K 78643K 13 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 699 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 7 26K 26K 78643K 7 0 UVM amap 305 83K 88K 78643K 70460 0 UVM aobj 95 4K 4K 78643K 99 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 40 0 NDP 11 0K 2K 78643K 27 0 temp 124 4703K 4767K 78643K 16255 0 kqueue 12 18K 24K 78643K 309 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 120 122 0 116 2 0 2 2 0 8 1 rtentry 112 114 0 2 4 0 4 4 0 8 0 unpcb 136 1956 0 1943 14 13 1 9 0 8 0 syncache 296 11 0 11 3 3 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 631 0 627 20 12 8 9 0 8 7 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 7 0 7 2 2 0 1 0 8 0 ipqe 40 9 0 9 2 2 0 1 0 8 0 inpcb 304 1204 0 1197 22 16 6 11 0 8 5 ip6q 72 4 0 3 2 1 1 1 0 8 0 ip6af 40 7 0 6 2 1 1 1 0 8 0 nd6 48 27 0 1 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 473 0 2 30 0 30 30 0 8 0 art_table 32 474 0 2 4 0 4 4 0 8 0 art_node 16 113 0 11 1 0 1 1 0 8 0 semapl 112 233 0 223 1 0 1 1 0 8 0 shmpl 112 96 0 4 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7741 0 6308 90 0 90 90 0 8 0 ffsino 272 7741 0 6308 96 0 96 96 0 8 0 nchpl 144 14545 0 12888 62 0 62 62 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 35086 0 35084 2 1 1 2 0 8 0 percpumem 16 40 0 0 1 0 1 1 0 8 0 scxspl 216 41684 0 41682 14 13 1 8 0 8 0 plimitpl 152 247 0 225 1 0 1 1 0 8 0 sigapl 424 6131 0 6081 7 0 7 7 0 8 0 futexpl 64 16501 0 16499 1 0 1 1 0 8 0 knotepl 120 305 0 0 9 1 8 8 0 8 0 kqueuepl 216 669 0 660 9 4 5 5 0 8 4 pipepl 336 546 0 518 13 5 8 8 0 8 5 fdescpl 496 6116 0 6082 7 1 6 6 0 8 0 filepl 152 15903 0 15665 36 19 17 23 0 8 7 lockfpl 104 86 0 84 1 0 1 1 0 8 0 lockfspl 48 41 0 39 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 26 0 10 1 0 1 1 0 8 0 ucredpl 96 1636 0 1618 1 0 1 1 0 8 0 zombiepl 144 6082 0 6081 1 0 1 1 0 8 0 processpl 1064 6131 0 6081 5 1 4 4 0 8 0 procpl 672 12650 0 12585 8 1 7 7 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 480 3396 0 3370 80 69 11 41 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 1 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 187 0 0 16 1 15 16 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 693 0 0 37 0 37 37 0 8 0 bufpl 288 9433 0 3098 453 0 453 453 0 8 0 anonpl 24 1502110 0 1488456 154 44 110 114 0 186 16 amapchunkpl 152 166667 0 165928 43 7 36 37 0 158 0 amappl16 200 11112 0 10748 41 17 24 33 0 8 4 amappl15 192 2934 0 2924 1 0 1 1 0 8 0 amappl14 184 1446 0 1440 2 1 1 1 0 8 0 amappl13 176 79 0 78 1 0 1 1 0 8 0 amappl12 168 24 0 19 1 0 1 1 0 8 0 amappl11 160 764 0 752 1 0 1 1 0 8 0 amappl10 152 760 0 757 1 0 1 1 0 8 0 amappl9 144 1182 0 1178 1 0 1 1 0 8 0 amappl8 136 1355 0 1292 3 0 3 3 0 8 0 amappl7 128 831 0 816 1 0 1 1 0 8 0 amappl6 120 922 0 901 2 1 1 2 0 8 0 amappl5 112 4536 0 4517 1 0 1 1 0 8 0 amappl4 104 3689 0 3654 2 0 2 2 0 8 0 amappl3 96 221 0 210 1 0 1 1 0 8 0 amappl2 88 598 0 557 3 1 2 3 0 8 0 amappl1 80 101455 0 100845 18 3 15 18 0 8 0 amappl 88 69989 0 69759 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 98 0 4 2 0 2 2 0 8 0 uaddrrnd 24 6116 0 6082 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6116 0 6082 1 0 1 1 0 8 0 vmmpekpl 168 34603 0 34547 3 0 3 3 0 8 0 vmmpepl 168 523980 0 521496 177 48 129 147 0 357 10 vmsppl 368 6115 0 6082 4 0 4 4 0 8 0 rwobjpl 56 118582 0 111271 114 7 107 108 0 8 1 pdppl 4096 12239 0 12164 161 80 81 95 0 8 6 pvpl 32 2538878 0 2520378 331 139 192 243 0 265 20 pmappl 248 6115 0 6082 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 938 0 101 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff829baff0) 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 __mp_lock(ffffffff829de780) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829de780) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff800027ac7110,ffff800000077500) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff829de780) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829de780) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800027ac7260,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xb sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff829de780) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829de780) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800027ac75a0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800027ac75a0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff7da0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 witness_checkorder(fffffd80665d95f0,1,0) at witness_checkorder+0x10b7 witness_debugger sys/kern/subr_witness.c:2502 [inline] witness_checkorder(fffffd80665d95f0,1,0) at witness_checkorder+0x10b7 sys/kern/subr_witness.c:1105 rw_enter_read(fffffd80665d95e0) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800029532df0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1758 uvm_fault_check(ffff800029532df0,ffff800029532e28,ffff800029532e50) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(fffffd80665d95d8,20000000,0,2) at uvm_fault+0x102 sys/uvm/uvm_fault.c:602 kpageflttrap(ffff800029532f80,20000300) at kpageflttrap+0x209 kerntrap(ffff800029532f80) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 ifioctl_get(c0106924,ffff800029533230) at ifioctl_get+0x2dd soo_ioctl(fffffd8073d69448,c0106924,ffff800029533230,ffff800027eda2a8) at soo_ioctl+0x26c sys_ioctl(ffff800027eda2a8,ffff800029533348,ffff8000295333a0) at sys_ioctl+0x4a2 syscall(ffff800029533410) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800029533410) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3703f113a60, count: -15