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 23030 97311 0 0 0 1 syz-executor.0 *495709 97311 0 0 0x4000000 0K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff823daa71) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82948b78,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82948b68) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000234c3740,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1641 uvm_fault_check(ffff8000234c3740,ffff8000234c3778,ffff8000234c37a0) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:637 uvm_fault(ffffffff82948b60,ffff8000232bd000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:591 kpageflttrap(ffff8000234c38d0,ffff8000232bdfe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000234c38d0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffffffff827d7e78) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffffffff827d7e78) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffffffff827d7e78,1) 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: 0xffff8000234c3b10, 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(ffffffff823daa71) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82948b78,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82948b68) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000234c3740,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1641 uvm_fault_check(ffff8000234c3740,ffff8000234c3778,ffff8000234c37a0) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:637 uvm_fault(ffffffff82948b60,ffff8000232bd000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:591 kpageflttrap(ffff8000234c38d0,ffff8000232bdfe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000234c38d0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffffffff827d7e78) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffffffff827d7e78) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffffffff827d7e78,1) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x82 kd_claim sys/dev/kcov.c:602 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x82 sys/dev/kcov.c:147 _kernel_lock() at _kernel_lock+0x10 sys/kern/kern_lock.c:63 sleep_setup(ffff8000234c3ca8,ffff80002123c7e8,120,ffffffff823c21e7,0) at sleep_setup+0xcd sys/kern/kern_synch.c:370 rwsleep(ffff80002123c7e8,ffffffff827383c0,120,ffffffff823c21e7,0) at rwsleep+0xcf sys/kern/kern_synch.c:311 futex_wait(7378bc0c430,a,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:254 sys_futex(ffff80002123c7e8,ffff8000234c3e40,ffff8000234c3e90) at sys_futex+0x114 sys/kern/sys_futex.c:110 syscall(ffff8000234c3f10) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234c3f10) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x737e2e1e2f0, count: -24 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000234c33a0 rbx 0xffff8000234c33b0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff819c3b45 kprintf+0x145 r9 0x1 r10 0x2997db0ef5311d08 r11 0xeed0f6fe395e3612 r12 0x3000000008 r13 0xffff8000234c3450 r14 0x100 r15 0x1 rip 0xffffffff81e1d5b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000234c3390 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=495709 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002123c2a8,0xffffffff82947930 process=0xffff800021236608 user=0xffff8000234be000, vmspace=0xfffffd807effa5c0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97311 23030 29746 0 7 0 syz-executor.0 *97311 495709 29746 0 7 0x4000000 syz-executor.0 78707 462928 77037 0 2 0x482 syz-executor.1 29746 236467 77037 0 3 0x82 nanoslp syz-executor.0 77037 287741 83699 0 3 0x82 thrsleep syz-fuzzer 77037 341306 83699 0 2 0x4000482 syz-fuzzer 77037 179913 83699 0 3 0x4000082 thrsleep syz-fuzzer 77037 328737 83699 0 3 0x4000082 thrsleep syz-fuzzer 77037 72820 83699 0 3 0x4000082 kqread syz-fuzzer 77037 347192 83699 0 3 0x4000082 thrsleep syz-fuzzer 77037 97631 83699 0 3 0x4000082 thrsleep syz-fuzzer 77037 79836 83699 0 3 0x4000082 nanoslp syz-fuzzer 83699 427952 49707 0 3 0x10008a sigsusp ksh 49707 149720 99968 0 3 0x92 select sshd 51312 209308 1 0 3 0x100083 ttyin getty 99968 84818 1 0 3 0x80 select sshd 345 106691 37329 74 3 0x100092 bpf pflogd 37329 449524 1 0 3 0x80 netio pflogd 25313 91276 1268 73 3 0x100090 kqread syslogd 1268 291110 1 0 3 0x100082 netio syslogd 76079 399140 1 77 3 0x100090 poll dhclient 81421 53398 1 0 3 0x80 poll dhclient 79293 64008 0 0 3 0x14200 bored smr 16559 228512 0 0 3 0x14200 pgzero zerothread 38901 503663 0 0 3 0x14200 aiodoned aiodoned 94949 245562 0 0 3 0x14200 syncer update 58197 500535 0 0 3 0x14200 cleaner cleaner 53587 48111 0 0 3 0x14200 reaper reaper 1192 373028 0 0 3 0x14200 pgdaemon pagedaemon 15924 445972 0 0 3 0x14200 bored crynlk 63316 248755 0 0 3 0x14200 bored crypto 23598 489153 0 0 3 0x14200 bored viomb 86689 515779 0 0 3 0x40014200 acpi0 acpi0 51070 61029 0 0 3 0x40014200 idle1 12108 305905 0 0 3 0x14200 bored softnet 13389 974 0 0 3 0x14200 bored systqmp 24801 491822 0 0 3 0x14200 bored systq 75152 130811 0 0 3 0x40014200 bored softclock 19535 117460 0 0 3 0x40014200 idle0 1 295211 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 (0xffffffff826e8438) #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 __sanitizer_cov_trace_pc+0x82 kd_claim sys/dev/kcov.c:602 [inline] #9 __sanitizer_cov_trace_pc+0x82 sys/dev/kcov.c:147 #10 _kernel_lock+0x10 sys/kern/kern_lock.c:63 #11 sleep_setup+0xcd sys/kern/kern_synch.c:370 #12 rwsleep+0xcf sys/kern/kern_synch.c:311 #13 futex_wait+0x13c sys/kern/sys_futex.c:254 #14 sys_futex+0x114 sys/kern/sys_futex.c:110 #15 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #15 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #16 Xsyscall+0x128 shared mutex timeout r = 0 (0xffffffff826cb3d0) #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 __sanitizer_cov_trace_pc+0x82 kd_claim sys/dev/kcov.c:602 [inline] #6 __sanitizer_cov_trace_pc+0x82 sys/dev/kcov.c:147 #7 _kernel_lock+0x10 sys/kern/kern_lock.c:63 #8 sleep_setup+0xcd sys/kern/kern_synch.c:370 #9 rwsleep+0xcf sys/kern/kern_synch.c:311 #10 futex_wait+0x13c sys/kern/sys_futex.c:254 #11 sys_futex+0x114 sys/kern/sys_futex.c:110 #12 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #13 Xsyscall+0x128 Process 97311 (syz-executor.0) thread 0xffff80002123c7e8 (495709) exclusive rwlock futex r = 0 (0xffffffff827383d0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 sys_futex+0x102 sys/kern/sys_futex.c:109 #2 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #3 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 2 (0xffffffff8289cfb0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 sys_futex+0xf6 sys/kern/sys_futex.c:109 #2 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #3 Xsyscall+0x128 exclusive mutex /syzkaller/managers/multicore/kernel/sys/dev/kcov.c:125 r = 0 (0xffffffff826e8438) #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 __sanitizer_cov_trace_pc+0x82 kd_claim sys/dev/kcov.c:602 [inline] #9 __sanitizer_cov_trace_pc+0x82 sys/dev/kcov.c:147 #10 _kernel_lock+0x10 sys/kern/kern_lock.c:63 #11 sleep_setup+0xcd sys/kern/kern_synch.c:370 #12 rwsleep+0xcf sys/kern/kern_synch.c:311 #13 futex_wait+0x13c sys/kern/sys_futex.c:254 #14 sys_futex+0x114 sys/kern/sys_futex.c:110 #15 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #15 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #16 Xsyscall+0x128 shared mutex timeout r = 0 (0xffffffff826cb3d0) #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 __sanitizer_cov_trace_pc+0x82 kd_claim sys/dev/kcov.c:602 [inline] #6 __sanitizer_cov_trace_pc+0x82 sys/dev/kcov.c:147 #7 _kernel_lock+0x10 sys/kern/kern_lock.c:63 #8 sleep_setup+0xcd sys/kern/kern_synch.c:370 #9 rwsleep+0xcf sys/kern/kern_synch.c:311 #10 futex_wait+0x13c sys/kern/sys_futex.c:254 #11 sys_futex+0x114 sys/kern/sys_futex.c:110 #12 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9490 6419K 6435K 78643K 10638 0 pcb 13 8K 8K 78643K 23 0 rtable 105 3K 3K 78643K 197 0 ifaddr 49 11K 11K 78643K 50 0 counters 44 34K 34K 78643K 44 0 ioctlops 0 0K 4K 78643K 1469 0 iov 0 0K 2K 78643K 4 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1241 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 10 0K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 30541 0 sigio 1 0K 0K 78643K 45 0 proc 59 63K 95K 78643K 447 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 641 0 in_multi 33 2K 2K 78643K 33 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 31 148K 148K 78643K 31 0 exec 0 0K 2K 78643K 356 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 269 40K 40K 78643K 62850 0 UVM aobj 6 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 7 0K 0K 78643K 11 0 temp 71 3964K 4028K 78643K 63674 0 kqueue 3 4K 9K 78643K 26 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 21 0 19 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 137 0 127 1 0 1 1 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 152 0 152 1 1 0 1 0 8 0 tcpcb 736 349 0 335 9 3 6 6 0 8 4 inpcb 304 393 0 387 3 1 2 2 0 8 1 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 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 256 189 0 0 12 0 12 12 0 8 0 art_table 32 190 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 semupl 112 5 0 5 1 0 1 1 0 8 1 semapl 112 9 0 1 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 31939 0 30534 88 0 88 88 0 8 0 ffsino 272 31939 0 30534 95 1 94 94 0 8 0 nchpl 144 62707 0 61102 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 126597 0 126597 2 1 1 1 0 8 1 percpumem 16 33 0 0 1 0 1 1 0 8 0 scxspl 216 188059 0 188059 9 8 1 8 0 8 1 plimitpl 152 15 0 7 1 0 1 1 0 8 0 sigapl 424 30756 0 30724 4 0 4 4 0 8 0 futexpl 56 112676 0 112675 1 0 1 1 0 8 0 knotepl 112 82 0 62 1 0 1 1 0 8 0 kqueuepl 168 29229 0 29226 1 0 1 1 0 8 0 pipepl 336 159 0 147 4 2 2 2 0 8 1 fdescpl 496 30740 0 30724 3 0 3 3 0 8 0 filepl 152 61728 0 61624 8 3 5 5 0 8 1 lockfpl 104 20 0 19 1 0 1 1 0 8 0 lockfspl 48 9 0 8 1 0 1 1 0 8 0 sessionpl 144 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 65 0 56 1 0 1 1 0 8 0 zombiepl 144 30724 0 30723 2 1 1 1 0 8 0 processpl 1080 30756 0 30723 3 0 3 3 0 8 0 procpl 672 62099 0 62058 5 1 4 4 0 8 0 sockpl 432 551 0 533 5 1 4 4 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 27 0 0 2 0 2 2 0 8 0 mcl9k 9216 26 0 0 2 0 2 2 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 193 0 0 21 1 20 21 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 786 0 0 23 0 23 23 0 8 0 bufpl 280 33862 0 27602 448 0 448 448 0 8 0 anonpl 24 1839055 0 1807694 220 1 219 219 0 186 0 amapchunkpl 152 95368 0 94236 46 0 46 46 0 158 0 amappl16 200 75528 0 74441 65 7 58 60 0 8 0 amappl15 192 15300 0 15296 1 0 1 1 0 8 0 amappl14 184 15215 0 15213 1 0 1 1 0 8 0 amappl13 176 25 0 24 1 0 1 1 0 8 0 amappl12 168 26 0 20 1 0 1 1 0 8 0 amappl11 160 46 0 33 1 0 1 1 0 8 0 amappl10 152 20 0 12 1 0 1 1 0 8 0 amappl9 144 285 0 284 1 0 1 1 0 8 0 amappl8 136 361 0 299 3 0 3 3 0 8 0 amappl7 128 70 0 60 1 0 1 1 0 8 0 amappl6 120 85 0 73 1 0 1 1 0 8 0 amappl5 112 30664 0 30653 1 0 1 1 0 8 0 amappl4 104 520 0 492 1 0 1 1 0 8 0 amappl3 96 7693 0 7682 1 0 1 1 0 8 0 amappl2 88 260332 0 260264 2 0 2 2 0 8 0 amappl1 80 821765 0 821292 26 15 11 21 0 8 0 amappl 88 62494 0 62308 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 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 30740 0 30724 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 30740 0 30724 1 0 1 1 0 8 0 vmmpekpl 168 100144 0 100117 3 1 2 2 0 8 0 vmmpepl 168 3749039 0 3746591 156 43 113 137 0 357 3 vmsppl 368 30739 0 30724 2 0 2 2 0 8 0 rwobjpl 56 743706 0 741776 37 9 28 29 0 8 0 pdppl 4096 61487 0 61448 62 21 41 45 0 8 2 pvpl 32 10184914 0 10150563 326 7 319 323 0 265 0 pmappl 232 30739 0 30724 2 1 1 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 333 0 32 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(ffffffff823daa71) at panic+0x15e sys/kern/subr_prf.c:218 witness_checkorder(ffffffff82948b78,1,0) at witness_checkorder+0x1188 sys/kern/subr_witness.c:833 rw_enter_read(ffffffff82948b68) at rw_enter_read+0x66 sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff8000234c3740,0) at uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1641 uvm_fault_check(ffff8000234c3740,ffff8000234c3778,ffff8000234c37a0) at uvm_fault_check+0x3a sys/uvm/uvm_fault.c:637 uvm_fault(ffffffff82948b60,ffff8000232bd000,0,2) at uvm_fault+0xe2 sys/uvm/uvm_fault.c:591 kpageflttrap(ffff8000234c38d0,ffff8000232bdfe8) at kpageflttrap+0x202 sys/arch/amd64/amd64/trap.c:265 kerntrap(ffff8000234c38d0) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:321 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b memcpy() at memcpy+0x15 timeout_run(ffffffff827d7e78) at timeout_run+0xd6 timeout_sync_leave sys/kern/kern_timeout.c:207 [inline] timeout_run(ffffffff827d7e78) at timeout_run+0xd6 sys/kern/kern_timeout.c:676 softclock_process_tick_timeout(ffffffff827d7e78,1) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x82 kd_claim sys/dev/kcov.c:602 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x82 sys/dev/kcov.c:147 _kernel_lock() at _kernel_lock+0x10 sys/kern/kern_lock.c:63 sleep_setup(ffff8000234c3ca8,ffff80002123c7e8,120,ffffffff823c21e7,0) at sleep_setup+0xcd sys/kern/kern_synch.c:370 rwsleep(ffff80002123c7e8,ffffffff827383c0,120,ffffffff823c21e7,0) at rwsleep+0xcf sys/kern/kern_synch.c:311 futex_wait(7378bc0c430,a,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:254 sys_futex(ffff80002123c7e8,ffff8000234c3e40,ffff8000234c3e90) at sys_futex+0x114 sys/kern/sys_futex.c:110 syscall(ffff8000234c3f10) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000234c3f10) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:590 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x737e2e1e2f0, count: -24 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d68ff0) 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(ffffffff8289cda8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8289cda8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 upageflttrap(ffff800021218ee0,7379a9db000) at upageflttrap+0x77 sys/arch/amd64/amd64/trap.c:180 usertrap(ffff800021218ee0) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffc8a90, count: 8 ddb{1}> trace x86_ipi_db(ffff800020d68ff0) 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(ffffffff8289cda8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8289cda8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 upageflttrap(ffff800021218ee0,7379a9db000) at upageflttrap+0x77 sys/arch/amd64/amd64/trap.c:180 usertrap(ffff800021218ee0) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:406 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffc8a90, count: -7