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 *138160 77270 32767 0x10 0x4000000 1 syz-executor 312554 77270 32767 0x10 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83071c68) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806c1acb58,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806c1acb48,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a91fe60,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a91fe60,ffff80002a91fe98,ffff80002a91fec0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806c1aca68,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a920000,2000020c) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a920000) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a920384,5,20000100,ffff80002a9203b8,0,37,e4213288eab61726) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000385e4fb8,ffff80002a9204f0,ffff80002a920440) at sys_sysctl+0x422 syscall(ffff80002a9204f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9204f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002a920570, 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(ffffffff83071c68) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806c1acb58,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806c1acb48,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a91fe60,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a91fe60,ffff80002a91fe98,ffff80002a91fec0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806c1aca68,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a920000,2000020c) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a920000) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a920384,5,20000100,ffff80002a9203b8,0,37,e4213288eab61726) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000385e4fb8,ffff80002a9204f0,ffff80002a920440) at sys_sysctl+0x422 syscall(ffff80002a9204f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9204f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcf5678b3fc0, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a91fa60 rbx 0xffff800029b7cdbf rdx 0 rcx 0xffff8000385e4fb8 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x61a8438f4c14619e r11 0xf6ba90f226b7a01f r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff820e3355 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a91fa50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=138160 pid=77270 tcnt=4 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000385e4310,0xffff8000385e4830 process=0xffff800029fea8d0 user=0xffff80002a91b000, vmspace=0xfffffd806c1aca68 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77270 430902 15998 32767 2 0x10 syz-executor 77270 460013 15998 32767 2 0x4000010 syz-executor *77270 138160 15998 32767 7 0x4000010 syz-executor 77270 312554 15998 32767 7 0x4000010 syz-executor 28578 306310 67968 32767 2 0x10 syz-executor 28578 112726 67968 32767 3 0x4000090 fsleep syz-executor 84964 313692 58934 32767 2 0x10 syz-executor 84964 155063 58934 32767 3 0x4000090 sbwait syz-executor 27877 101269 45490 32767 3 0x90 nanoslp syz-executor 27877 390003 45490 32767 3 0x4000090 sbwait syz-executor 38518 166977 30706 32767 3 0x90 nanoslp syz-executor 38518 475678 30706 32767 3 0x4000090 kqread syz-executor 63646 383804 51028 32767 3 0x90 nanoslp syz-executor 63646 244970 51028 32767 3 0x4000090 lockf syz-executor 63646 463309 51028 32767 3 0x4000090 fsleep syz-executor 67968 36222 65740 32767 3 0x90 nanoslp syz-executor 65740 482962 44434 0 3 0x82 wait syz-executor 58934 200394 21314 32767 3 0x90 nanoslp syz-executor 21314 246502 44434 0 3 0x82 wait syz-executor 15998 338675 68565 32767 3 0x90 nanoslp syz-executor 68565 473168 44434 0 3 0x82 wait syz-executor 44790 196811 34734 32767 3 0x90 piperd syz-executor 34734 455806 44434 0 3 0x82 wait syz-executor 42556 205107 17634 32767 3 0x90 wait syz-executor 17634 56637 44434 0 3 0x82 wait syz-executor 30706 319072 89526 32767 3 0x90 nanoslp syz-executor 89526 270754 44434 0 3 0x82 wait syz-executor 45490 486116 16848 32767 3 0x90 nanoslp syz-executor 16848 494858 44434 0 3 0x82 wait syz-executor 51028 305236 85691 32767 3 0x90 nanoslp syz-executor 85691 280422 44434 0 3 0x82 wait syz-executor 46675 499888 56302 0 3 0x100082 sbwait arp 56302 450055 34207 0 3 0x10008a sigsusp sh 34207 367479 1 0 3 0x80 wait syz-executor 18299 416024 77149 32767 3 0x3810 suspend syz-executor 18299 271151 77149 32767 4 0x4081810 syz-executor 77149 347558 1 32767 3 0x90 wait syz-executor 51514 406116 0 0 3 0x14200 bored sosplice 44434 395549 89224 0 2 0x2 syz-executor 89224 507018 41649 0 3 0x10008a sigsusp ksh 41649 348151 50144 0 3 0x98 kqread sshd-session 50144 226500 45494 0 3 0x92 kqread sshd-session 98873 187779 1 0 3 0x100083 ttyin getty 45494 227320 1 0 3 0x88 kqread sshd 89478 10304 34191 73 3 0x1100090 kqread syslogd 34191 416554 1 0 3 0x100082 sbwait syslogd 98740 235536 1 0 3 0x100080 kqread resolvd 13596 451511 67361 77 3 0x100092 kqread dhcpleased 30871 515363 67361 77 3 0x100092 kqread dhcpleased 67361 470734 1 0 3 0x80 kqread dhcpleased 58440 357058 0 0 3 0x14200 bored smr 87708 16837 0 0 2 0x14200 zerothread 9304 137925 0 0 3 0x14200 aiodoned aiodoned 68362 245455 0 0 3 0x14200 syncer update 63483 60874 0 0 3 0x14200 cleaner cleaner 79308 143581 0 0 3 0x14200 reaper reaper 55625 448598 0 0 3 0x14200 pgdaemon pagedaemon 13363 274293 0 0 3 0x14200 bored viomb 28106 385787 0 0 3 0x40014200 acpi0 acpi0 4092 425972 0 0 3 0x40014200 idle1 4682 32218 0 0 3 0x14200 bored softnet3 86818 159826 0 0 3 0x14200 bored softnet2 12709 304756 0 0 3 0x14200 bored softnet1 28614 11305 0 0 3 0x14200 bored softnet0 84074 464169 0 0 3 0x14200 bored systqmp 94847 43154 0 0 3 0x14200 bored systq 40224 444521 0 0 3 0x14200 tmoslp softclockmp 80618 150354 0 0 3 0x40014200 tmoslp softclock 7570 413515 0 0 3 0x40014200 idle0 1 452591 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 (0xffffffff835ccb38) #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+0x1771 #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 77270 (syz-executor) thread 0xffff8000385e4fb8 (138160) exclusive rwlock netlock r = 0 (0xffffffff834f07f0) #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 (0xffffffff835c9da0) #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 (0xffffffff834f5e30) #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 (0xffffffff835ccb38) #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+0x1771 #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 77270 (syz-executor) thread 0xffff8000385e4820 (312554) exclusive rwlock vmmaplk r = 0 (0xfffffd806c1acb58) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 11052K 11059K 166960K 13067 0 pcb 17 24K 28K 166960K 27 0 rtable 238 6K 7K 166960K 20856 0 pf 31 16K 16K 166960K 1219 0 ifaddr 42 15K 19K 166960K 2404 0 ifgroup 50 2K 2K 166960K 2416 0 sysctl 4 1K 5K 166960K 37 0 counters 64 36K 36K 166960K 1242 0 ioctlops 0 0K 2K 166960K 1256 0 iov 0 0K 36K 166960K 2728 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1456 92K 92K 166960K 15722 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 589 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1120 0 dirhash 15 3K 4K 166960K 879 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 30 113K 157K 166960K 34696 0 sigio 0 0K 0K 166960K 1019 0 proc 58 79K 176K 166960K 19746 0 subproc 130 8K 12K 166960K 9867 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 7726 0 in_multi 99 7K 7K 166960K 7762 0 ether_multi 1 0K 0K 166960K 186 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 14033 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 309 92K 131K 166960K 293701 0 UVM aobj 131 4K 8K 166960K 146 0 pinsyscall 52 104K 126K 166960K 52761 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2079 0 NDP 11 0K 2K 166960K 1786 0 temp 83 6825K 6952K 166960K 208657 0 kqueue 13 20K 38K 166960K 5559 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 5481 0 5476 28 27 1 3 0 8 0 rtentry 112 6934 0 6822 12 8 4 4 0 8 0 unpcb 144 31525 0 31510 149 147 2 9 0 8 1 syncache 336 649 0 649 36 35 1 1 0 8 1 tcpqe 32 306 0 306 37 36 1 1 0 8 1 tcpcb 808 20991 0 20925 252 238 14 20 0 8 5 arp 120 1210 0 1192 1 0 1 1 0 8 0 ipq 40 246 0 241 8 7 1 1 0 8 0 ipqe 40 5812 0 5807 8 7 1 1 0 8 0 inpcb 336 47616 0 47544 289 277 12 22 0 8 3 ip6q 72 5 0 5 3 3 0 1 0 8 0 ip6af 40 10 0 10 3 3 0 1 0 8 0 nd6 136 2137 0 2111 10 8 2 2 0 8 0 kcovpl 48 759 0 749 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 28084 0 27618 191 159 32 34 0 8 1 art_table 32 28085 0 27618 10 5 5 5 0 8 0 art_node 16 6933 0 6831 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1114 0 1104 1 0 1 1 0 8 0 shmpl 112 143 0 15 4 0 4 4 0 8 0 dirhash 1024 610 0 583 18 14 4 4 0 8 0 dino2pl 256 43095 0 39468 230 2 228 228 0 8 0 ffsino 272 43095 0 39468 243 0 243 243 0 8 0 nchpl 144 78765 0 75581 120 1 119 119 0 8 0 uvmvnodes 80 10521 0 0 215 0 215 215 0 8 0 vnodes 216 10521 0 0 585 0 585 585 0 8 0 namei 1024 351388 0 351388 31 30 1 2 0 8 1 percpumem 16 635 0 589 1 0 1 1 0 8 0 kstatmem 264 1200 0 1178 2 0 2 2 0 8 0 scxspl 216 365336 0 365336 91 90 1 7 1 8 1 plimitpl 152 10246 0 10218 2 0 2 2 0 8 0 sigapl 424 33833 0 33772 15 7 8 9 0 8 0 futexpl 64 389314 0 389312 24 23 1 1 0 8 0 knotepl 120 1701 0 0 26 0 26 26 0 8 0 kqueuepl 216 10956 0 10946 101 99 2 7 0 8 1 pipepl 320 7184 0 7151 92 86 6 11 0 8 2 fdescpl 496 33814 0 33772 17 11 6 7 0 8 0 filepl 152 236466 0 236156 181 165 16 21 0 8 3 lockfpl 104 9646 0 9641 11 10 1 4 0 8 0 lockfspl 48 2706 0 2703 1 0 1 1 0 8 0 sessionpl 144 972 0 954 1 0 1 1 0 8 0 pgrppl 48 2531 0 2505 1 0 1 1 0 8 0 ucredpl 104 43893 0 43873 1 0 1 1 0 8 0 zombiepl 144 33774 0 33772 1 0 1 1 0 8 0 processpl 1160 33833 0 33772 9 4 5 6 0 8 0 procpl 648 77371 0 77300 25 18 7 8 0 8 0 srpgc 96 20 0 20 9 9 0 1 0 8 0 sosppl 168 369 0 366 30 29 1 1 0 8 0 sockpl 664 85315 0 85213 413 398 15 29 0 8 2 mcl64k 65536 52 0 0 5 1 4 4 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 261 0 0 19 4 15 19 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 424 0 0 8 1 7 7 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 5984 0 0 297 0 297 297 0 8 0 bufpl 280 57721 0 47135 757 0 757 757 0 8 0 anonpl 24 4091845 0 4085025 471 403 68 127 0 185 0 amapchunkpl 152 952851 0 952025 324 280 44 48 0 158 7 amappl16 200 88715 0 88639 593 576 17 46 0 8 9 amappl15 192 19 0 19 9 9 0 1 0 8 0 amappl14 184 2016 0 2005 1 0 1 1 0 8 0 amappl13 176 32 0 31 6 5 1 1 0 8 0 amappl12 168 44282 0 44239 21 18 3 3 0 8 0 amappl11 160 49 0 39 1 0 1 1 0 8 0 amappl10 152 11 0 10 2 1 1 1 0 8 0 amappl9 144 120 0 119 2 1 1 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 1646 0 1634 1 0 1 1 0 8 0 amappl6 120 6028 0 6025 1 0 1 1 0 8 0 amappl5 112 2846 0 2836 1 0 1 1 0 8 0 amappl4 104 3517 0 3498 1 0 1 1 0 8 0 amappl3 96 194773 0 194615 5 0 5 5 0 8 0 amappl2 88 13390 0 13324 3 1 2 3 0 8 0 amappl1 80 238092 0 237502 25 8 17 18 0 8 1 amappl 88 284673 0 284424 10 3 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 72 145 0 15 3 0 3 3 0 8 0 uaddrrnd 24 33814 0 33772 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 33814 0 33772 1 0 1 1 0 8 0 vmmpekpl 168 305061 0 304998 5 1 4 5 0 8 0 vmmpepl 168 2133165 0 2130863 431 312 119 131 0 357 6 vmsppl 440 33813 0 33772 13 7 6 6 0 8 0 rwobjpl 56 581288 0 569586 213 43 170 172 0 8 0 pdppl 4096 67635 0 67544 1521 1424 97 113 0 8 6 pvpl 32 46535 0 0 373 2 371 371 0 265 0 pmappl 248 33813 0 33772 12 8 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3147 0 2187 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8348fff0) 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 __mp_lock(ffffffff835c9b98) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835c9b98) at __mp_lock+0x199 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+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(ffffffff835c9b98) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835c9b98) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff80002a8f4130) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a8f4130) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcf5bc39f060, count: 5 ddb{0}> trace x86_ipi_db(ffffffff8348fff0) 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 __mp_lock(ffffffff835c9b98) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835c9b98) at __mp_lock+0x199 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+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(ffffffff835c9b98) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835c9b98) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff80002a8f4130) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a8f4130) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcf5bc39f060, count: -10 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(ffffffff83071c68) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806c1acb58,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806c1acb48,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a91fe60,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a91fe60,ffff80002a91fe98,ffff80002a91fec0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806c1aca68,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a920000,2000020c) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a920000) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a920384,5,20000100,ffff80002a9203b8,0,37,e4213288eab61726) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000385e4fb8,ffff80002a9204f0,ffff80002a920440) at sys_sysctl+0x422 syscall(ffff80002a9204f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9204f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80002a920570, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83071c68) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806c1acb58,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd806c1acb48,2) at rw_enter+0x122 uvmfault_lookup(ffff80002a91fe60,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80002a91fe60,ffff80002a91fe98,ffff80002a91fec0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806c1aca68,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80002a920000,2000020c) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80002a920000) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80002a920384,5,20000100,ffff80002a9203b8,0,37,e4213288eab61726) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff8000385e4fb8,ffff80002a9204f0,ffff80002a920440) at sys_sysctl+0x422 syscall(ffff80002a9204f0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a9204f0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcf5678b3fc0, count: -15