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 * 41055 32977 32767 0x10 0x4000000 1 syz-executor 227509 63718 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8050a04b40,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8050a04b30,2) at rw_enter+0x122 uvmfault_lookup(ffff800034383420,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800034383420,ffff800034383458,ffff800034383480) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8050a04a50,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000343835c0,20000134) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000343835c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800034383944,5,20000100,ffff800034383978,0,37,c2d48156add4aa0e) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003d3d0fa0,ffff800034383ab0,ffff800034383a00) at sys_sysctl+0x422 syscall(ffff800034383ab0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800034383ab0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800034383b30, 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(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8050a04b40,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8050a04b30,2) at rw_enter+0x122 uvmfault_lookup(ffff800034383420,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800034383420,ffff800034383458,ffff800034383480) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8050a04a50,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000343835c0,20000134) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000343835c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800034383944,5,20000100,ffff800034383978,0,37,c2d48156add4aa0e) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003d3d0fa0,ffff800034383ab0,ffff800034383a00) at sys_sysctl+0x422 syscall(ffff800034383ab0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800034383ab0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x357604bc4b0, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800034383020 rbx 0xffff800029b7cdcf rdx 0 rcx 0xffff80003d3d0fa0 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe1d94f4e74e883a8 r11 0x445983df1c2d9a08 r12 0xffff800029b7cbd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82a3f635 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800034383010 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=41055 pid=32977 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=0xffff80003d3d0d18,0xffff800034bb62c0 process=0xffff800032f7b1e8 user=0xffff80003437e000, vmspace=0xfffffd8050a04a50 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15735 454772 94498 32767 2 0x10 syz-executor 15735 36283 94498 32767 3 0x4000090 fsleep syz-executor 32977 517141 8351 32767 2 0x10 syz-executor *32977 41055 8351 32767 7 0x4000010 syz-executor 32977 313071 8351 32767 3 0x4000090 fsleep syz-executor 32977 105299 8351 32767 2 0x4000010 syz-executor 51698 312768 53057 32767 3 0x90 nanoslp syz-executor 51698 221449 53057 32767 3 0x4000090 kqsel syz-executor 51698 150896 53057 32767 3 0x4000090 fsleep syz-executor 80827 213833 83061 32767 2 0x10 syz-executor 80827 242988 83061 32767 3 0x4000090 kqread syz-executor 80827 460068 83061 32767 3 0x4000090 fsleep syz-executor 14765 157539 1164 32767 2 0x10 syz-executor 14765 434635 1164 32767 3 0x4000090 kqsel syz-executor 67829 353179 51942 32767 3 0x90 nanoslp syz-executor 51942 43880 59263 0 3 0x82 wait syz-executor 94498 163645 98097 32767 3 0x90 nanoslp syz-executor 98097 282625 59263 0 3 0x82 wait syz-executor 1164 496863 57221 32767 2 0x10 syz-executor 57221 6071 59263 0 3 0x82 wait syz-executor 53057 141471 39809 32767 3 0x90 nanoslp syz-executor 39809 370706 59263 0 3 0x82 wait syz-executor 22252 488485 29880 32767 2 0x10 syz-executor 29880 248289 59263 0 3 0x82 wait syz-executor 83061 10540 16866 32767 3 0x90 nanoslp syz-executor 94771 334804 69522 0 3 0x82 netio sshd-session 16866 406166 59263 0 3 0x82 wait syz-executor 85809 251495 72205 32767 2 0x10 syz-executor 72205 380211 59263 0 3 0x82 wait syz-executor 8351 159152 47091 32767 2 0x490 syz-executor 47091 520050 59263 0 3 0x82 wait syz-executor 59531 463669 84867 0 3 0x100082 sbwait arp 84867 66367 21419 0 3 0x10008a sigsusp sh 21419 259180 1 0 3 0x80 wait syz-executor 3446 125354 0 0 3 0x14200 bored sosplice 59263 395314 9742 0 2 0x2 syz-executor 9742 483021 98603 0 3 0x10008a sigsusp ksh 98603 317726 47533 0 3 0x98 kqread sshd-session 47533 483261 69522 0 3 0x92 kqread sshd-session 7500 96728 1 0 3 0x100083 ttyin getty 69522 83666 1 0 3 0x88 kqread sshd 84489 188855 98856 73 3 0x1100090 kqread syslogd 98856 327900 1 0 3 0x100082 sbwait syslogd 75131 36349 1 0 3 0x100080 kqread resolvd 67332 8826 3238 77 3 0x100092 kqread dhcpleased 75053 136836 3238 77 3 0x100092 kqread dhcpleased 3238 317334 1 0 3 0x80 kqread dhcpleased 54724 512498 0 0 3 0x14200 bored smr 28907 419997 0 0 2 0x14200 zerothread 19391 266753 0 0 3 0x14200 aiodoned aiodoned 91373 478344 0 0 3 0x14200 syncer update 96043 212884 0 0 3 0x14200 cleaner cleaner 81988 434377 0 0 3 0x14200 reaper reaper 24634 153984 0 0 3 0x14200 pgdaemon pagedaemon 31050 88211 0 0 3 0x14200 bored viomb 27990 514044 0 0 3 0x40014200 acpi0 acpi0 41035 206978 0 0 3 0x40014200 idle1 23258 254270 0 0 3 0x14200 bored softnet3 16381 90213 0 0 3 0x14200 bored softnet2 41906 415828 0 0 3 0x14200 bored softnet1 20625 496141 0 0 2 0x14200 softnet0 43909 263130 0 0 3 0x14200 bored systqmp 80746 510673 0 0 3 0x14200 bored systq 6414 245282 0 0 3 0x14200 tmoslp softclockmp 63718 227509 0 0 7 0x40014200 softclock 4659 34922 0 0 3 0x40014200 idle0 1 280217 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 (0xffffffff83596170) #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 32977 (syz-executor) thread 0xffff80003d3d0fa0 (41055) exclusive rwlock netlock r = 0 (0xffffffff8347bd10) #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 (0xffffffff8361ff38) #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 (0xffffffff83493120) #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 (0xffffffff83596170) #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 32977 (syz-executor) thread 0xffff800034bb7978 (313071) exclusive rwlock amaplk r = 0 (0xfffffd8061325328) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 uvm_map_protect+0xaf2 uvm_map_lock_entry sys/uvm/uvm_map.c:464 [inline] #1 uvm_map_protect+0xaf2 sys/uvm/uvm_map.c:3185 #2 sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585 #3 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #3 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd8050a04b40) #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 10228 11053K 11059K 166960K 13135 0 pcb 17 24K 26K 166960K 27 0 rtable 248 7K 7K 166960K 21199 0 pf 31 16K 16K 166960K 1258 0 ifaddr 42 15K 19K 166960K 2475 0 ifgroup 50 2K 2K 166960K 2495 0 sysctl 4 1K 5K 166960K 23 0 counters 64 36K 36K 166960K 1282 0 ioctlops 0 0K 2K 166960K 1386 0 iov 0 0K 32K 166960K 2897 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1470 92K 92K 166960K 15610 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 566 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1787 0 dirhash 21 4K 5K 166960K 816 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 28 105K 169K 166960K 34991 0 sigio 0 0K 0K 166960K 1047 0 proc 58 79K 176K 166960K 20274 0 subproc 117 7K 13K 166960K 9737 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 7673 0 in_multi 99 7K 7K 166960K 8033 0 ether_multi 1 0K 0K 166960K 196 0 mrt 2 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 307 1367K 1367K 166960K 307 0 exec 0 0K 1K 166960K 14109 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 297 85K 140K 166960K 294177 0 UVM aobj 131 6K 8K 166960K 153 0 pinsyscall 52 104K 136K 166960K 52861 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 2377 0 NDP 11 0K 2K 166960K 1838 0 temp 81 6825K 6952K 166960K 272601 0 kqueue 15 24K 38K 166960K 5451 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 5291 0 5286 33 32 1 3 0 8 0 rtentry 112 7083 0 6966 17 13 4 4 0 8 0 unpcb 144 31819 0 31801 156 152 4 9 0 8 3 syncache 336 682 0 682 34 33 1 1 0 8 1 tcpqe 32 304 0 304 43 43 0 1 0 8 0 tcpcb 808 21710 0 21557 241 225 16 23 0 8 0 arp 120 1243 0 1224 1 0 1 1 0 8 0 ipq 40 160 0 155 3 2 1 1 0 8 0 ipqe 40 2252 0 2247 3 2 1 1 0 8 0 inpcb 336 49498 0 49340 261 247 14 26 0 8 0 ip6q 72 4 0 4 4 4 0 1 0 8 0 ip6af 40 8 0 8 4 4 0 1 0 8 0 nd6 136 2151 0 2121 9 7 2 2 0 8 0 kcovpl 48 749 0 740 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 28655 0 28178 186 155 31 32 0 8 0 art_table 32 28656 0 28178 8 4 4 5 0 8 0 art_node 16 7082 0 6975 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 8 2 1 1 1 0 8 0 semapl 112 1778 0 1768 1 0 1 1 0 8 0 shmpl 112 150 0 22 4 0 4 4 0 8 0 dirhash 1024 568 0 537 9 4 5 5 0 8 1 dino2pl 256 42783 0 39114 230 0 230 230 0 8 0 ffsino 272 42783 0 39114 247 1 246 246 0 8 0 nchpl 144 79311 0 76142 118 0 118 118 0 8 0 uvmvnodes 80 10596 0 0 217 0 217 217 0 8 0 vnodes 216 10596 0 0 589 0 589 589 0 8 0 namei 1024 347882 0 347882 59 58 1 3 0 8 1 percpumem 16 655 0 609 1 0 1 1 0 8 0 kstatmem 264 1240 0 1218 2 0 2 2 0 8 0 scxspl 216 337718 0 337718 100 97 3 8 1 8 3 plimitpl 152 12074 0 12046 2 0 2 2 0 8 0 sigapl 424 34023 0 33963 16 8 8 9 0 8 0 futexpl 64 392908 0 392904 34 33 1 1 0 8 0 knotepl 120 1834 0 0 25 0 25 25 0 8 0 kqueuepl 216 11568 0 11556 102 100 2 8 0 8 0 pipepl 320 7166 0 7135 78 70 8 9 0 8 4 fdescpl 496 34004 0 33963 27 20 7 8 0 8 0 filepl 152 237586 0 237184 181 164 17 22 0 8 1 lockfpl 104 9395 0 9393 8 7 1 2 0 8 0 lockfspl 48 2679 0 2677 1 0 1 1 0 8 0 sessionpl 144 855 0 837 1 0 1 1 0 8 0 pgrppl 48 2191 0 2165 1 0 1 1 0 8 0 ucredpl 104 43299 0 43280 1 0 1 1 0 8 0 zombiepl 144 33965 0 33963 1 0 1 1 0 8 0 processpl 1160 34023 0 33963 15 10 5 6 0 8 0 procpl 648 77486 0 77417 16 9 7 8 0 8 0 srpgc 96 25 0 25 13 13 0 1 0 8 0 sosppl 168 398 0 388 19 18 1 1 0 8 0 sockpl 664 87318 0 87135 430 414 16 30 0 8 0 mcl64k 65536 68 0 0 6 1 5 5 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 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 304 0 0 20 5 15 20 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 469 0 0 10 3 7 7 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 7341 0 0 408 0 408 408 0 8 0 bufpl 280 58828 0 48231 758 0 758 758 0 8 0 anonpl 24 4246131 0 4234309 431 333 98 146 0 185 0 amapchunkpl 152 976864 0 975977 338 293 45 54 0 158 6 amappl16 200 96787 0 96537 402 376 26 52 0 8 4 amappl15 192 22 0 22 6 6 0 1 0 8 0 amappl14 184 1800 0 1786 2 1 1 2 0 8 0 amappl13 176 27 0 27 14 14 0 1 0 8 0 amappl12 168 44576 0 44534 12 9 3 3 0 8 0 amappl11 160 62 0 51 1 0 1 1 0 8 0 amappl10 152 14 0 14 1 1 0 1 0 8 0 amappl9 144 187 0 186 2 1 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 1576 0 1562 1 0 1 1 0 8 0 amappl6 120 6206 0 6203 1 0 1 1 0 8 0 amappl5 112 2776 0 2766 1 0 1 1 0 8 0 amappl4 104 3151 0 3133 1 0 1 1 0 8 0 amappl3 96 195188 0 195048 8 3 5 5 0 8 0 amappl2 88 12013 0 11938 4 1 3 3 0 8 0 amappl1 80 206370 0 205716 37 19 18 24 0 8 0 amappl 88 285883 0 285649 9 2 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 72 152 0 22 3 0 3 3 0 8 0 uaddrrnd 24 34004 0 33963 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 34004 0 33963 1 0 1 1 0 8 0 vmmpekpl 168 297111 0 297050 9 5 4 5 0 8 0 vmmpepl 168 2161634 0 2159125 413 286 127 146 0 357 6 vmsppl 440 34003 0 33963 13 7 6 7 0 8 0 rwobjpl 56 561923 0 549924 220 46 174 176 0 8 2 pdppl 4096 68015 0 67926 1466 1373 93 119 0 8 4 pvpl 32 49875 0 0 390 0 390 390 0 265 0 pmappl 248 34003 0 33963 17 13 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3185 0 2107 31 0 31 31 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83486ff0) 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 __mp_acquire_count(ffffffff8361fd30,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 msleep(ffffffff835b30e0,ffffffff83445cc0,0,ffffffff830e3bea,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000fffff440) at softclock_thread+0x11f sys/kern/kern_timeout.c:807 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83486ff0) 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 __mp_acquire_count(ffffffff8361fd30,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 msleep(ffffffff835b30e0,ffffffff83445cc0,0,ffffffff830e3bea,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000fffff440) at softclock_thread+0x11f sys/kern/kern_timeout.c:807 end trace frame: 0x0, count: -9 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(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8050a04b40,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8050a04b30,2) at rw_enter+0x122 uvmfault_lookup(ffff800034383420,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800034383420,ffff800034383458,ffff800034383480) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8050a04a50,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000343835c0,20000134) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000343835c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800034383944,5,20000100,ffff800034383978,0,37,c2d48156add4aa0e) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003d3d0fa0,ffff800034383ab0,ffff800034383a00) at sys_sysctl+0x422 syscall(ffff800034383ab0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800034383ab0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800034383b30, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830711b3) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd8050a04b40,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter(fffffd8050a04b30,2) at rw_enter+0x122 uvmfault_lookup(ffff800034383420,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800034383420,ffff800034383458,ffff800034383480) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd8050a04a50,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff8000343835c0,20000134) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff8000343835c0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800034383944,5,20000100,ffff800034383978,0,37,c2d48156add4aa0e) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003d3d0fa0,ffff800034383ab0,ffff800034383a00) at sys_sysctl+0x422 syscall(ffff800034383ab0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800034383ab0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x357604bc4b0, count: -15