panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) kmmaplk Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *390519 30389 0 0 0 0K syz-executor.1 355589 9743 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e9800) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82955680,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82955670) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000222b75c0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 uvm_fault_check(ffff8000222b75c0,ffff8000222b75f8,ffff8000222b7620) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(ffffffff82955668,ffff8000232b5000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 kpageflttrap(ffff8000222b7750,ffff8000232b5ce8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000222b7750) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff80002126b860) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff80002126b860) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff80002126b860,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 end trace frame: 0xffff8000222b7990, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic acquiring blockable sleep lock with spinlock or critical section held (rwlock) kmmaplk ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e9800) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82955680,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82955670) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000222b75c0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 uvm_fault_check(ffff8000222b75c0,ffff8000222b75f8,ffff8000222b7620) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(ffffffff82955668,ffff8000232b5000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 kpageflttrap(ffff8000222b7750,ffff8000232b5ce8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000222b7750) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff80002126b860) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff80002126b860) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff80002126b860,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f uvm_fault_upper_lookup(ffff8000222b7bc0,ffff8000222b7bf8,ffff8000222b7ac0,ffff8000222b7b40) at uvm_fault_upper_lookup+0x216 sys/uvm/uvm_fault.c:880 uvm_fault(fffffd807eff9a10,7433db8d000,0,2) at uvm_fault+0x129 sys/uvm/uvm_fault.c:606 upageflttrap(ffff8000222b7d30,7433db8d818) at upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 usertrap(ffff8000222b7d30) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffc61c0, count: -21 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000222b7220 rbx 0xffff8000222b7230 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff818e0585 kprintf+0x145 r9 0x1 r10 0x9088e96ef9377bab r11 0x2b5abc2aa5e0e47e r12 0x3000000008 r13 0xffff8000222b72d0 r14 0x100 r15 0x1 rip 0xffffffff816993f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000222b7210 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=390519 stat=onproc flags process=0 proc=0 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002126b500,0xffffffff8285a990 process=0xffff8000212250f0 user=0xffff8000222b2000, vmspace=0xfffffd807eff9a10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *30389 390519 53200 0 7 0 syz-executor.1 37254 410536 1 0 3 0x100083 ttyin getty 53200 505906 42836 0 3 0x82 nanoslp syz-executor.1 41219 473404 42836 0 2 0x482 syz-executor.0 42836 43498 17579 0 3 0x82 thrsleep syz-fuzzer 42836 351459 17579 0 3 0x4000082 nanoslp syz-fuzzer 42836 11326 17579 0 3 0x4000082 thrsleep syz-fuzzer 42836 416953 17579 0 3 0x4000082 thrsleep syz-fuzzer 42836 374934 17579 0 3 0x4000082 kqread syz-fuzzer 42836 259464 17579 0 3 0x4000082 thrsleep syz-fuzzer 42836 520508 17579 0 3 0x4000082 thrsleep syz-fuzzer 42836 437031 17579 0 3 0x4000082 thrsleep syz-fuzzer 17579 287855 97104 0 3 0x10008a sigsusp ksh 97104 393092 32273 0 3 0x92 select sshd 32273 441844 1 0 3 0x80 select sshd 62320 388096 60056 74 3 0x100092 bpf pflogd 60056 182354 1 0 3 0x80 netio pflogd 62033 165816 89623 73 3 0x100090 kqread syslogd 89623 161958 1 0 3 0x100082 netio syslogd 77445 150836 1 77 3 0x100090 poll dhclient 43454 133089 1 0 3 0x80 poll dhclient 48049 441858 0 0 3 0x14200 bored smr 85654 164976 0 0 2 0x14200 zerothread 42748 376982 0 0 3 0x14200 aiodoned aiodoned 82737 293230 0 0 3 0x14200 syncer update 69860 327463 0 0 3 0x14200 cleaner cleaner 9743 355589 0 0 7 0x14200 reaper 70822 467548 0 0 3 0x14200 pgdaemon pagedaemon 24232 329461 0 0 3 0x14200 bored crynlk 26680 34758 0 0 3 0x14200 bored crypto 76392 314140 0 0 3 0x14200 bored viomb 2379 427060 0 0 3 0x40014200 acpi0 acpi0 56270 451784 0 0 3 0x40014200 idle1 40133 81763 0 0 3 0x14200 bored softnet 79922 53329 0 0 3 0x14200 bored systqmp 93834 271559 0 0 3 0x14200 bored systq 95162 38375 0 0 3 0x40014200 bored softclock 16277 216569 0 0 3 0x40014200 idle0 1 277114 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff82735db8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 kcov_remote_leave+0x1f sys/dev/kcov.c:674 #4 timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] #4 timeout_run+0xd6 sys/kern/kern_timeout.c:676 #5 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #6 softclock+0x11a sys/kern/kern_timeout.c:752 #7 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #8 Xsoftclock+0x1f #9 uvm_fault_upper_lookup+0x216 sys/uvm/uvm_fault.c:880 #10 uvm_fault+0x129 sys/uvm/uvm_fault.c:606 #11 upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 #12 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #13 recall_trap+0x8 shared mutex timeout r = 0 (0xffffffff8273eee0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #3 softclock+0x11a sys/kern/kern_timeout.c:752 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x1f #6 uvm_fault_upper_lookup+0x216 sys/uvm/uvm_fault.c:880 #7 uvm_fault+0x129 sys/uvm/uvm_fault.c:606 #8 upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 #9 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #10 recall_trap+0x8 CPU 1: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff82877690) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_freepages+0x10c sys/uvm/uvm_pmemrange.c:1289 #4 pmap_do_remove+0x646 sys/arch/amd64/amd64/pmap.c:1872 #5 uvm_map_teardown+0x195 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x195 sys/uvm/uvm_map.c:2743 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655 #7 reaper+0x189 sys/kern/kern_exit.c:462 #8 proc_trampoline+0x1c Process 30389 (syz-executor.1) thread 0xffff80002126a000 (390519) exclusive rwlock amaplk r = 0 (0xfffffd806c46eac8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault_check+0x3d7 sys/uvm/uvm_fault.c:774 #2 uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 #4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd807eff9a28) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 #3 uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 #5 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #6 recall_trap+0x8 exclusive kernel_lock &kernel_lock r = 2 (0xffffffff8285e998) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 upageflttrap+0x77 sys/arch/amd64/amd64/trap.c:180 #2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #3 recall_trap+0x8 exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff82735db8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 kcov_remote_leave+0x1f sys/dev/kcov.c:674 #4 timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] #4 timeout_run+0xd6 sys/kern/kern_timeout.c:676 #5 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #6 softclock+0x11a sys/kern/kern_timeout.c:752 #7 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #8 Xsoftclock+0x1f #9 uvm_fault_upper_lookup+0x216 sys/uvm/uvm_fault.c:880 #10 uvm_fault+0x129 sys/uvm/uvm_fault.c:606 #11 upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 #12 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #13 recall_trap+0x8 shared mutex timeout r = 0 (0xffffffff8273eee0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 timeout_run+0xb7 sys/kern/kern_timeout.c:670 #2 softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 #3 softclock+0x11a sys/kern/kern_timeout.c:752 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x1f #6 uvm_fault_upper_lookup+0x216 sys/uvm/uvm_fault.c:880 #7 uvm_fault+0x129 sys/uvm/uvm_fault.c:606 #8 upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 #9 usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 #10 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9485 6416K 6554K 78643K 10725 0 pcb 13 8K 8K 78643K 78 0 rtable 105 3K 3K 78643K 196 0 ifaddr 44 10K 10K 78643K 45 0 counters 44 34K 34K 78643K 44 0 ioctlops 0 0K 4K 78643K 1579 0 iov 0 0K 2K 78643K 43 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 1 0 vnodes 1220 77K 77K 78643K 1258 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 359 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 7414 0 sigio 0 0K 0K 78643K 2 0 proc 59 63K 95K 78643K 472 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 78 0 in_multi 33 2K 2K 78643K 41 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 362 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 280 38K 38K 78643K 90546 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 4 0 NDP 6 0K 0K 78643K 10 0 temp 72 3969K 4080K 78643K 17168 0 kqueue 3 4K 5K 78643K 11 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 120 19 0 17 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 1378 0 1368 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 668 0 668 1 1 0 1 0 8 0 tcpcb 736 128 0 122 3 2 1 2 0 8 0 inpcb 304 12000 0 11994 5 4 1 2 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 kcovpl 48 2 0 0 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 11 0 9 1 0 1 1 0 8 0 pfstkey 112 11 0 9 1 0 1 1 0 8 0 pfstate 320 11 0 9 1 0 1 1 0 8 0 pfrule 1360 111 0 106 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 187 0 0 12 0 12 12 0 8 0 art_table 32 188 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 2 1 0 1 1 0 8 0 semupl 112 6 0 6 2 2 0 1 0 8 0 semapl 112 357 0 347 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8943 0 7536 89 1 88 89 0 8 0 ffsino 272 8943 0 7536 95 1 94 94 0 8 0 nchpl 144 17005 0 15397 60 0 60 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 36535 0 36535 2 1 1 1 0 8 1 percpumem 16 33 0 0 1 0 1 1 0 8 0 scxspl 216 51754 0 51754 9 8 1 8 0 8 1 plimitpl 152 16 0 8 1 0 1 1 0 8 0 sigapl 424 7630 0 7598 4 0 4 4 0 8 0 futexpl 56 52598 0 52598 1 0 1 1 0 8 1 knotepl 112 68 0 48 1 0 1 1 0 8 0 kqueuepl 168 8843 0 8841 1 0 1 1 0 8 0 pipepl 336 517 0 506 7 5 2 2 0 8 1 fdescpl 496 7614 0 7598 3 0 3 3 0 8 0 filepl 152 33501 0 33400 6 1 5 5 0 8 0 lockfpl 104 600 0 598 1 0 1 1 0 8 0 lockfspl 48 244 0 242 1 0 1 1 0 8 0 sessionpl 144 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 150 0 141 1 0 1 1 0 8 0 zombiepl 144 7598 0 7597 2 1 1 1 0 8 0 processpl 1080 7630 0 7597 3 0 3 3 0 8 0 procpl 672 16558 0 16518 5 1 4 5 0 8 0 sockpl 432 13397 0 13379 8 5 3 4 0 8 0 mcl64k 65536 18 0 0 3 1 2 3 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 246 0 0 25 2 23 25 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 399 0 0 16 0 16 16 0 8 0 bufpl 280 11560 0 5294 448 0 448 448 0 8 0 anonpl 24 1916358 0 1890682 163 1 162 163 0 186 0 amapchunkpl 152 212841 0 211906 40 1 39 39 0 158 0 amappl16 200 11621 0 10784 47 2 45 46 0 8 0 amappl15 192 63 0 55 1 0 1 1 0 8 0 amappl14 184 4 0 2 1 0 1 1 0 8 0 amappl13 176 28 0 27 1 0 1 1 0 8 0 amappl12 168 42 0 35 1 0 1 1 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 13 0 7 1 0 1 1 0 8 0 amappl9 144 4016 0 4013 1 0 1 1 0 8 0 amappl8 136 7688 0 7631 2 0 2 2 0 8 0 amappl7 128 3776 0 3764 1 0 1 1 0 8 0 amappl6 120 109 0 94 1 0 1 1 0 8 0 amappl5 112 7638 0 7622 1 0 1 1 0 8 0 amappl4 104 570 0 541 1 0 1 1 0 8 0 amappl3 96 96 0 91 1 0 1 1 0 8 0 amappl2 88 477 0 429 2 0 2 2 0 8 0 amappl1 80 128440 0 128020 14 4 10 12 0 8 0 amappl 88 89416 0 89216 5 0 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 64 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 7614 0 7598 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7614 0 7598 1 0 1 1 0 8 0 vmmpekpl 168 38520 0 38490 2 0 2 2 0 8 0 vmmpepl 168 846757 0 844538 131 30 101 127 0 357 1 vmsppl 368 7613 0 7597 2 0 2 2 0 8 0 rwobjpl 56 143196 0 141595 30 6 24 24 0 8 1 pdppl 4096 15235 0 15194 62 21 41 45 0 8 0 pvpl 32 4189697 0 4160965 272 26 246 247 0 265 5 pmappl 232 7613 0 7597 2 1 1 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 330 0 37 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823e9800) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82955680,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82955670) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000222b75c0,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1701 uvm_fault_check(ffff8000222b75c0,ffff8000222b75f8,ffff8000222b7620) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:674 uvm_fault(ffffffff82955668,ffff8000232b5000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:601 kpageflttrap(ffff8000222b7750,ffff8000232b5ce8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000222b7750) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffff80002126b860) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffff80002126b860) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffff80002126b860,0) at softclock_process_tick_timeout+0x196 sys/kern/kern_timeout.c:721 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:752 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x1f uvm_fault_upper_lookup(ffff8000222b7bc0,ffff8000222b7bf8,ffff8000222b7ac0,ffff8000222b7b40) at uvm_fault_upper_lookup+0x216 sys/uvm/uvm_fault.c:880 uvm_fault(fffffd807eff9a10,7433db8d000,0,2) at uvm_fault+0x129 sys/uvm/uvm_fault.c:606 upageflttrap(ffff8000222b7d30,7433db8d818) at upageflttrap+0x87 sys/arch/amd64/amd64/trap.c:180 usertrap(ffff8000222b7d30) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffc61c0, count: -21 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 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(ffffffff8285e790) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8285e790) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211b19b0,1) at uvm_unmap_detach+0xfc sys/uvm/uvm_map.c:1585 uvm_map_teardown(fffffd807eff9730) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2761 uvmspace_free(fffffd807eff9730) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655 reaper(ffff8000211b3a48) at reaper+0x189 sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 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(ffffffff8285e790) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8285e790) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211b19b0,1) at uvm_unmap_detach+0xfc sys/uvm/uvm_map.c:1585 uvm_map_teardown(fffffd807eff9730) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2761 uvmspace_free(fffffd807eff9730) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3655 reaper(ffff8000211b3a48) at reaper+0x189 sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -8