panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 55882 50287 0 0x100002 0x8 0 sh *252194 73651 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830785dc) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bbc1988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806bbc1978,2) at rw_enter+0x122 uvmfault_lookup(ffff8000372774e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff8000372774e0,ffff800037277518,ffff800037277540) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bbc1898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037277680,20000110) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037277680) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277a04,5,20000100,ffff800037277a38,0,37,58f93c2b4d6db80c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff800029fe79b8,ffff800037277b70,ffff800037277ac0) at sys_sysctl+0x422 syscall(ffff800037277b70) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037277b70) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037277bf0, count: 0 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 *cpu1: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830785dc) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bbc1988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806bbc1978,2) at rw_enter+0x122 uvmfault_lookup(ffff8000372774e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff8000372774e0,ffff800037277518,ffff800037277540) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bbc1898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037277680,20000110) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037277680) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277a04,5,20000100,ffff800037277a38,0,37,58f93c2b4d6db80c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff800029fe79b8,ffff800037277b70,ffff800037277ac0) at sys_sysctl+0x422 syscall(ffff800037277b70) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037277b70) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa7052f1c8e0, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000372770e0 rbx 0xffff800029b7cdcf rdx 0 rcx 0xffff800029fe79b8 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x858dde4eb7f3f4d6 r11 0xee31df5b77c0d6f5 r12 0xffff800029b7cbd0 r13 0 r14 0 r15 0x1 rip 0xffffffff81f08875 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000372770d0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=252194 pid=73651 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800029fe74a8,0xffff800029fe7230 process=0xffff80004428fae8 user=0xffff800037272000, vmspace=0xfffffd806bbc1898 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7595 387896 50287 0 2 0x100000 sh 50287 55882 95690 0 7 0x10000a sh 95690 523051 97086 0 3 0x80 wait syz-executor 73651 12783 71465 32767 2 0x10 syz-executor 73651 124728 71465 32767 3 0x4000090 fsleep syz-executor 73651 507827 71465 32767 3 0x4000090 fsleep syz-executor *73651 252194 71465 32767 7 0x4000010 syz-executor 97086 50652 61727 0 3 0x82 wait syz-executor 10613 346138 9450 32767 3 0x90 nanoslp syz-executor 10613 243610 9450 32767 3 0x4000090 fsleep syz-executor 10613 137591 9450 32767 3 0x4000090 kqsel syz-executor 2628 239945 7276 32767 3 0x90 nanoslp syz-executor 2628 24874 7276 32767 3 0x4000090 netacc syz-executor 2628 65296 7276 32767 3 0x4000090 sbwait syz-executor 2628 228836 7276 32767 3 0x4000090 fsleep syz-executor 3781 202095 17009 32767 3 0x90 nanoslp syz-executor 3781 91275 17009 32767 3 0x4000090 kqread syz-executor 3781 417867 17009 32767 3 0x4000090 fsleep syz-executor 63911 268246 87527 32767 3 0x90 nanoslp syz-executor 63911 311575 87527 32767 3 0x4000090 kqsel syz-executor 63911 311126 87527 32767 3 0x4000090 fsleep syz-executor 63911 229833 87527 32767 3 0x4000090 fsleep syz-executor 71465 398773 10566 32767 3 0x90 nanoslp syz-executor 10566 84282 61727 0 3 0x82 wait syz-executor 93363 369046 23271 32767 3 0x90 nanoslp syz-executor 23271 340581 61727 0 3 0x82 wait syz-executor 9450 34135 87906 32767 3 0x90 nanoslp syz-executor 87906 226256 61727 0 3 0x82 wait syz-executor 17009 220757 85090 32767 3 0x90 nanoslp syz-executor 85090 136842 61727 0 3 0x82 wait syz-executor 41711 517036 98216 32767 3 0x90 wait syz-executor 98216 118300 61727 0 3 0x82 wait syz-executor 7276 269471 47296 32767 3 0x90 nanoslp syz-executor 47296 97524 61727 0 3 0x82 wait syz-executor 87527 331643 903 32767 3 0x90 nanoslp syz-executor 903 136556 61727 0 3 0x82 wait syz-executor 85181 377161 64415 0 3 0x100082 sbwait arp 64415 321371 59885 0 3 0x10008a sigsusp sh 59885 272314 1 0 3 0x80 wait syz-executor 25510 183 0 0 3 0x14200 bored sosplice 24414 179342 3270 0 3 0x100082 sbwait arp 3270 358749 76481 0 3 0x10008a sigsusp sh 59507 503929 54048 0 3 0x100082 sbwait arp 54048 64784 38347 0 3 0x10008a sigsusp sh 76481 9917 1 0 3 0x80 wait syz-executor 38347 300683 1 0 3 0x80 wait syz-executor 61727 474711 9200 0 3 0x82 kqread syz-executor 9200 416600 43952 0 3 0x10008a sigsusp ksh 43952 435791 42447 0 3 0x98 kqread sshd-session 42447 394655 80266 0 3 0x92 kqread sshd-session 55622 431080 1 0 3 0x100083 ttyin getty 80266 390661 1 0 3 0x88 kqread sshd 79875 94656 80352 73 3 0x1100090 kqread syslogd 80352 515521 1 0 3 0x100082 sbwait syslogd 44423 207280 1 0 3 0x100080 kqread resolvd 76400 218880 46326 77 3 0x100092 kqread dhcpleased 72598 455487 46326 77 3 0x100092 kqread dhcpleased 46326 381928 1 0 3 0x80 kqread dhcpleased 55397 260938 0 0 3 0x14200 bored smr 85106 362705 0 0 2 0x14200 zerothread 35352 351586 0 0 3 0x14200 aiodoned aiodoned 37784 467085 0 0 3 0x14200 syncer update 98249 163454 0 0 3 0x14200 cleaner cleaner 41265 414662 0 0 3 0x14200 reaper reaper 71455 23810 0 0 3 0x14200 pgdaemon pagedaemon 98391 521940 0 0 3 0x14200 bored viomb 83529 484122 0 0 3 0x40014200 acpi0 acpi0 98530 34124 0 0 3 0x40014200 idle1 2116 359898 0 0 3 0x14200 bored softnet3 93652 392700 0 0 3 0x14200 bored softnet2 60123 206290 0 0 3 0x14200 bored softnet1 10500 187504 0 0 3 0x14200 bored softnet0 76403 468269 0 0 3 0x14200 bored systqmp 43054 502840 0 0 3 0x14200 bored systq 88986 329099 0 0 3 0x14200 tmoslp softclockmp 43667 423880 0 0 3 0x40014200 tmoslp softclock 65419 73375 0 0 3 0x40014200 idle0 1 3352 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff8359d880) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 sysctl_file+0xa2d #4 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #5 sys_sysctl+0x422 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 73651 (syz-executor) thread 0xffff800036ba4570 (124728) exclusive rwlock vmmaplk r = 0 (0xfffffd806bbc1988) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #3 uvm_map_protect+0xe1 sys/uvm/uvm_map.c:3059 #4 sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 73651 (syz-executor) thread 0xffff800029fe79b8 (252194) exclusive rwlock netlock r = 0 (0xffffffff834250a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sysctl_file+0xa18 sys/kern/kern_sysctl.c:1675 #2 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #3 sys_sysctl+0x422 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83541f98) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sysctl_vslock+0x80 sys/kern/kern_sysctl.c:181 #2 kern_sysctl+0x1b3 sys/kern/kern_sysctl.c:498 #3 sys_sysctl+0x422 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff8345bb60) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:176 #3 kern_sysctl+0x1b3 sys/kern/kern_sysctl.c:498 #4 sys_sysctl+0x422 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive mutex &table->inpt_mtx r = 0 (0xffffffff8359d880) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 sysctl_file+0xa2d #4 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #5 sys_sysctl+0x422 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 14123K 14131K 166960K 12710 0 pcb 17 22K 24K 166960K 25 0 rtable 222 6K 7K 166960K 16449 0 pf 29 16K 16K 166960K 973 0 ifaddr 38 10K 11K 166960K 1910 0 ifgroup 46 2K 2K 166960K 1926 0 sysctl 4 1K 5K 166960K 36 0 counters 62 36K 36K 166960K 998 0 ioctlops 0 0K 2K 166960K 1034 0 iov 1 2K 33K 166960K 2420 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1496 94K 94K 166960K 13381 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 433 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 1010 0 dirhash 21 4K 5K 166960K 609 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 36 137K 193K 166960K 27042 0 sigio 0 0K 0K 166960K 668 0 proc 58 79K 176K 166960K 15682 0 subproc 143 8K 14K 166960K 8476 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 6 0K 0K 166960K 6188 0 in_multi 89 6K 8K 166960K 6257 0 ether_multi 1 0K 0K 166960K 178 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 313 1394K 1394K 166960K 313 0 exec 0 0K 1K 166960K 11038 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 340 101K 157K 166960K 225709 0 UVM aobj 131 6K 7K 166960K 143 0 pinsyscall 60 120K 154K 166960K 41007 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1838 0 NDP 10 0K 2K 166960K 1416 0 temp 90 6825K 6953K 166960K 180262 0 kqueue 15 24K 38K 166960K 4219 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 4058 0 4052 25 22 3 3 0 8 2 rtentry 112 5506 0 5402 14 10 4 4 0 8 0 unpcb 144 24329 0 24308 111 105 6 8 0 8 5 syncache 336 488 0 487 31 30 1 1 0 8 0 tcpqe 32 237 0 237 30 29 1 1 0 8 1 tcpcb 808 17094 0 17011 200 185 15 28 0 8 3 arp 120 967 0 950 1 0 1 1 0 8 0 ipq 40 140 0 138 1 0 1 1 0 8 0 ipqe 40 2411 0 2409 1 0 1 1 0 8 0 inpcb 336 38701 0 38608 223 210 13 29 0 8 0 ip6q 72 5 0 5 4 4 0 1 0 8 0 ip6af 40 10 0 10 4 4 0 1 0 8 0 nd6 136 1691 0 1667 9 7 2 2 0 8 1 kcovpl 48 652 0 641 1 0 1 1 0 8 0 rttmr 136 1 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 22321 0 21895 178 147 31 33 0 8 1 art_table 32 22322 0 21895 15 10 5 5 0 8 0 art_node 16 5505 0 5410 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 11 3 2 1 1 0 8 0 semapl 112 997 0 987 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 430 0 399 5 0 5 5 0 8 1 dino2pl 256 33216 0 30023 200 0 200 200 0 8 0 ffsino 272 33216 0 30023 214 1 213 213 0 8 0 nchpl 144 60889 0 57919 111 0 111 111 0 8 0 uvmvnodes 80 10105 0 0 207 0 207 207 0 8 0 vnodes 216 10105 0 0 562 0 562 562 0 8 0 namei 1024 269914 0 269914 35 34 1 2 0 8 1 percpumem 16 513 0 468 1 0 1 1 0 8 0 kstatmem 264 956 0 936 2 0 2 2 0 8 0 scxspl 216 302504 0 302504 78 75 3 8 1 8 3 plimitpl 152 7748 0 7721 2 0 2 2 0 8 0 sigapl 424 26210 0 26143 14 5 9 10 0 8 0 futexpl 64 294510 0 294503 26 25 1 1 0 8 0 knotepl 120 1619 0 0 26 0 26 26 0 8 0 kqueuepl 216 9343 0 9330 73 68 5 8 0 8 4 pipepl 320 5896 0 5860 67 61 6 11 0 8 2 fdescpl 496 26191 0 26143 12 4 8 8 0 8 0 filepl 152 186427 0 186111 141 123 18 24 0 8 3 lockfpl 104 7861 0 7859 4 3 1 2 0 8 0 lockfspl 48 1991 0 1989 1 0 1 1 0 8 0 sessionpl 144 668 0 649 2 0 2 2 0 8 0 pgrppl 48 1694 0 1667 1 0 1 1 0 8 0 ucredpl 104 33870 0 33852 1 0 1 1 0 8 0 zombiepl 144 26145 0 26143 1 0 1 1 0 8 0 processpl 1160 26210 0 26143 7 1 6 6 0 8 0 procpl 648 59446 0 59366 14 6 8 8 0 8 0 srpgc 96 17 0 17 8 8 0 1 0 8 0 sosppl 168 310 0 307 20 19 1 1 0 8 0 sockpl 664 67780 0 67662 327 306 21 31 0 8 5 mcl64k 65536 53 0 0 3 0 3 3 0 8 0 mcl16k 16384 23 0 0 3 1 2 3 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 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 654 0 0 28 7 21 28 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 8754 0 0 488 0 488 488 0 8 0 bufpl 280 48063 0 37957 722 0 722 722 0 8 0 anonpl 24 3253179 0 3243231 282 174 108 108 0 185 24 amapchunkpl 152 736708 0 735777 260 212 48 55 0 158 6 amappl16 200 71383 0 71190 266 242 24 35 0 8 8 amappl15 192 11 0 11 5 4 1 1 0 8 1 amappl14 184 1404 0 1391 1 0 1 1 0 8 0 amappl13 176 23 0 23 12 12 0 1 0 8 0 amappl12 168 34525 0 34475 3 0 3 3 0 8 0 amappl11 160 48 0 37 1 0 1 1 0 8 0 amappl10 152 10 0 9 2 1 1 1 0 8 0 amappl9 144 132 0 131 2 1 1 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 1218 0 1204 1 0 1 1 0 8 0 amappl6 120 4805 0 4799 1 0 1 1 0 8 0 amappl5 112 2168 0 2158 1 0 1 1 0 8 0 amappl4 104 2426 0 2405 1 0 1 1 0 8 0 amappl3 96 149897 0 149729 5 0 5 5 0 8 0 amappl2 88 9412 0 9337 3 0 3 3 0 8 0 amappl1 80 161717 0 161074 33 9 24 24 0 8 1 amappl 88 219313 0 219039 8 1 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 72 142 0 12 3 0 3 3 0 8 0 uaddrrnd 24 26191 0 26143 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 26191 0 26143 1 0 1 1 0 8 0 vmmpekpl 168 236145 0 236098 9 4 5 5 0 8 0 vmmpepl 168 1662615 0 1659995 353 219 134 157 0 357 12 vmsppl 440 26190 0 26143 15 9 6 7 0 8 0 rwobjpl 56 433622 0 422095 199 30 169 169 0 8 1 pdppl 4096 52389 0 52286 1192 1089 103 133 0 8 0 pvpl 32 48581 0 0 393 1 392 392 0 265 0 pmappl 248 26190 0 26143 5 1 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2808 0 1706 32 0 32 32 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834c6ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 tsleep(ffffffff83549150,128,ffffffff82ff8183,0) at tsleep+0x1a1 sys/kern/kern_synch.c:141 sys_sigsuspend(ffff800036ba59b0,ffff80002e179ff0,ffff80002e179f40) at sys_sigsuspend+0x95 sys/kern/kern_sig.c:513 syscall(ffff80002e179ff0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002e179ff0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7384be9901d0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff834c6ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x4f sys/dev/kcov.c:164 tsleep(ffffffff83549150,128,ffffffff82ff8183,0) at tsleep+0x1a1 sys/kern/kern_synch.c:141 sys_sigsuspend(ffff800036ba59b0,ffff80002e179ff0,ffff80002e179f40) at sys_sigsuspend+0x95 sys/kern/kern_sig.c:513 syscall(ffff80002e179ff0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002e179ff0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7384be9901d0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830785dc) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bbc1988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806bbc1978,2) at rw_enter+0x122 uvmfault_lookup(ffff8000372774e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff8000372774e0,ffff800037277518,ffff800037277540) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bbc1898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037277680,20000110) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037277680) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277a04,5,20000100,ffff800037277a38,0,37,58f93c2b4d6db80c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff800029fe79b8,ffff800037277b70,ffff800037277ac0) at sys_sysctl+0x422 syscall(ffff800037277b70) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037277b70) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037277bf0, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830785dc) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806bbc1988,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806bbc1978,2) at rw_enter+0x122 uvmfault_lookup(ffff8000372774e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff8000372774e0,ffff800037277518,ffff800037277540) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806bbc1898,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037277680,20000110) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037277680) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277a04,5,20000100,ffff800037277a38,0,37,58f93c2b4d6db80c) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff800029fe79b8,ffff800037277b70,ffff800037277ac0) at sys_sysctl+0x422 syscall(ffff800037277b70) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037277b70) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa7052f1c8e0, count: -15