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 457401 79140 73 0x1100010 0 0 syslogd * 21083 32733 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83076719) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff8354dfd0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(ffffffff8354dfc0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800029fe5630,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800029fe5630,ffff800029fe5668,ffff800029fe5690) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(ffffffff8354dee0,7fbf1e0a5000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800029fe57d0,7fbf1e0a5050) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800029fe57d0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree_list(fffffd807082e000,0) at uvm_anfree_list+0xd6 amap_wipeout(fffffd806e5d3e20) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 uvm_unmap_detach(ffff800029fe5a00,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 end trace frame: 0xffff800029fe5a40, 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(ffffffff83076719) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff8354dfd0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(ffffffff8354dfc0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800029fe5630,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800029fe5630,ffff800029fe5668,ffff800029fe5690) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(ffffffff8354dee0,7fbf1e0a5000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800029fe57d0,7fbf1e0a5050) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800029fe57d0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree_list(fffffd807082e000,0) at uvm_anfree_list+0xd6 amap_wipeout(fffffd806e5d3e20) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 uvm_unmap_detach(ffff800029fe5a00,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd806bdfba50) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 uvmspace_free(fffffd806bdfba50) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 reaper(ffff800029fd8f38) at reaper+0x246 sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -17 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800029fe5290 rbx 0xffff800029b7cdbf rdx 0 rcx 0xffff800029fd8f38 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf563fcdf851cedb4 r11 0xf54edf07556a79d8 r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff82475685 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800029fe5280 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (reaper) tid=21083 pid=32733 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=84, usrpri=85, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800029fd91c0,0xffff800029fd8a38 process=0xffff800029febaf0 user=0xffff800029fe0000, vmspace=0xffffffff8354dee0 estcpu=35, cpticks=6, pctcpu=18.88, user=0, sys=9870, intr=35 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15011 42948 1 0 3 0x100083 ttyin getty 64686 506884 40741 0 3 0x82 wait syz-executor 89034 259128 0 0 3 0x14200 acct acct 3555 422155 40741 0 3 0x82 wait syz-executor 12723 68038 40741 0 3 0x82 wait syz-executor 60252 199870 40741 0 3 0x82 wait syz-executor 17880 66574 40741 0 3 0x82 wait syz-executor 28909 240736 40741 0 3 0x82 wait syz-executor 12151 201730 40741 0 3 0x82 wait syz-executor 22533 322005 0 0 3 0x14200 bored sosplice 28156 521460 0 0 3 0x14280 nfsidl nfsio 55837 451353 0 0 3 0x14280 nfsidl nfsio 90762 112724 0 0 3 0x14280 nfsidl nfsio 86303 51212 0 0 3 0x14280 nfsidl nfsio 8946 493274 0 0 3 0x14280 nfsidl nfsio 83881 511533 0 0 3 0x14280 nfsidl nfsio 5850 215203 0 0 3 0x14280 nfsidl nfsio 29456 198530 0 0 3 0x14280 nfsidl nfsio 4601 29498 0 0 3 0x14280 nfsidl nfsio 5096 72476 0 0 3 0x14280 nfsidl nfsio 12177 498514 0 0 3 0x14280 nfsidl nfsio 89111 213293 0 0 3 0x14280 nfsidl nfsio 30280 276876 0 0 3 0x14280 nfsidl nfsio 39894 51756 0 0 3 0x14280 nfsidl nfsio 6592 147431 0 0 3 0x14280 nfsidl nfsio 2480 476548 0 0 3 0x14280 nfsidl nfsio 25646 190348 0 0 3 0x14280 nfsidl nfsio 65339 330062 0 0 3 0x14280 nfsidl nfsio 98456 270469 0 0 3 0x14280 nfsidl nfsio 50793 209576 0 0 3 0x14280 nfsidl nfsio 40741 209055 97929 0 3 0x82 wait syz-executor 97929 68357 10876 0 3 0x10008a sigsusp ksh 10876 496849 49992 0 3 0x98 kqread sshd-session 49992 435206 94474 0 3 0x92 kqread sshd-session 94474 500829 1 0 3 0x88 kqread sshd 15574 482161 91117 74 3 0x1100092 bpf pflogd 91117 69635 1 0 3 0x80 sbwait pflogd 79140 457401 34071 73 7 0x1100010 syslogd 34071 379237 1 0 3 0x100082 sbwait syslogd 2245 96388 1 0 3 0x100080 kqread resolvd 61938 169169 67174 77 3 0x100092 kqread dhcpleased 27846 481677 67174 77 3 0x100092 kqread dhcpleased 67174 317366 1 0 3 0x80 kqread dhcpleased 49974 137832 0 0 3 0x14200 bored smr 54727 19383 0 0 3 0x14200 pgzero zerothread 83483 134297 0 0 3 0x14200 aiodoned aiodoned 22202 403180 0 0 3 0x14200 syncer update 33639 467804 0 0 3 0x14200 cleaner cleaner *32733 21083 0 0 7 0x14200 reaper 57805 289303 0 0 3 0x14200 pgdaemon pagedaemon 15234 453004 0 0 3 0x14200 bored viomb 97257 148224 0 0 3 0x40014200 acpi0 acpi0 10467 470089 0 0 3 0x40014200 idle1 99533 118275 0 0 3 0x14200 bored softnet3 65489 186389 0 0 3 0x14200 bored softnet2 29085 383510 0 0 3 0x14200 bored softnet1 83007 484701 0 0 3 0x14200 bored softnet0 57422 502806 0 0 3 0x14200 bored systqmp 90373 498795 0 0 3 0x14200 bored systq 9815 382425 0 0 3 0x14200 tmoslp softclockmp 15057 235001 0 0 3 0x40014200 tmoslp softclock 71057 98005 0 0 3 0x40014200 idle0 1 343096 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b463210) #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 pmap_page_remove+0xcd rcr3 machine/cpufunc.h:139 [inline] #3 pmap_page_remove+0xcd pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_page_remove+0xcd sys/arch/amd64/amd64/pmap.c:1974 #4 uvm_anfree_list+0xd6 #5 amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 #6 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #7 uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 #8 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #9 reaper+0x246 sys/kern/kern_exit.c:477 #10 proc_trampoline+0x10 Process 79140 (syslogd) thread 0xffff8000ffffdbe8 (457401) exclusive rrwlock inode r = 0 (0xfffffd806e3d20a0) #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 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 32733 (reaper) thread 0xffff800029fd8f38 (21083) exclusive rwlock amaplk r = 0 (0xfffffd806a1b2c90) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 amap_unref+0x38 sys/uvm/uvm_amap.c:1360 #2 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #3 uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 #4 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #5 reaper+0x246 sys/kern/kern_exit.c:477 #6 proc_trampoline+0x10 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b463210) #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 pmap_page_remove+0xcd rcr3 machine/cpufunc.h:139 [inline] #3 pmap_page_remove+0xcd pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_page_remove+0xcd sys/arch/amd64/amd64/pmap.c:1974 #4 uvm_anfree_list+0xd6 #5 amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 #6 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #7 uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 #8 uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 #9 reaper+0x246 sys/kern/kern_exit.c:477 #10 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11128K 11414K 166960K 13101 0 pcb 17 19K 20K 166960K 384 0 rtable 205 7K 10K 166960K 1584 0 pf 38 18K 21K 166960K 205 0 ifaddr 40 7K 8K 166960K 253 0 ifgroup 59 2K 2K 166960K 265 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 36K 166960K 178 0 ioctlops 0 0K 4K 166960K 1721 0 iov 0 0K 16K 166960K 187 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1419 89K 90K 166960K 3281 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 29 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 118 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 9 29K 93K 166960K 1988 0 sigio 0 0K 0K 166960K 56 0 proc 72 91K 140K 166960K 1646 0 subproc 91 5K 6K 166960K 534 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 202 0 in_multi 81 6K 7K 166960K 541 0 ether_multi 1 0K 0K 166960K 19 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 1193 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 72K 92K 166960K 18505 0 UVM aobj 39 4K 6K 166960K 42 0 pinsyscall 34 68K 106K 166960K 3937 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 96 0 NDP 12 0K 2K 166960K 157 0 temp 75 6824K 6920K 166960K 84793 0 kqueue 13 20K 30K 166960K 267 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 120 249 0 246 3 2 1 3 0 8 0 rtentry 112 554 0 464 5 2 3 4 0 8 0 unpcb 144 2284 0 2267 28 22 6 11 0 8 5 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 806 0 802 31 29 2 11 0 8 1 arp 120 90 0 71 1 0 1 1 0 8 0 inpcb 336 2402 0 2395 49 44 5 18 0 8 4 nd6 136 135 0 113 1 0 1 1 0 8 0 pkpcb 40 6 0 6 4 4 0 1 0 8 0 kcovpl 48 41 0 34 1 0 1 1 0 8 0 ppxss 1168 13 0 13 4 4 0 1 0 8 0 pfstscr 40 5 0 5 2 2 0 1 0 8 0 pffrag 232 18 0 10 1 0 1 1 0 482 0 pffrnode 88 17 0 9 1 0 1 1 0 8 0 pffrent 40 31 0 23 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 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pfstitem 24 239 0 164 1 0 1 1 0 8 0 pfstkey 128 245 0 136 5 0 5 5 0 8 0 pfstate 376 206 0 133 9 0 9 9 0 8 0 pfrule 1344 28 0 23 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 2225 0 1790 37 7 30 30 0 8 0 art_table 32 2228 0 1790 4 0 4 4 0 8 0 art_node 16 517 0 436 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 115 0 105 1 0 1 1 0 8 0 shmpl 112 39 0 3 2 0 2 2 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 4544 0 2984 99 0 99 99 0 8 0 ffsino 272 4544 0 2984 105 0 105 105 0 8 0 nchpl 144 6738 0 5009 65 0 65 65 0 8 0 uvmvnodes 80 5743 0 0 118 0 118 118 0 8 0 vnodes 216 5743 0 0 320 0 320 320 0 8 0 namei 1024 28094 0 28094 6 5 1 2 0 8 1 percpumem 16 103 0 57 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 138 0 114 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 36798 0 36798 10 9 1 8 1 8 1 plimitpl 152 600 0 583 1 0 1 1 0 8 0 sigapl 424 2249 0 2178 10 1 9 9 0 8 0 futexpl 64 21319 0 21319 4 3 1 1 0 8 1 knotepl 120 476 0 0 15 0 15 15 0 8 0 kqueuepl 216 468 0 459 3 2 1 2 0 8 0 pipepl 320 375 0 348 6 3 3 6 0 8 0 fdescpl 496 2207 0 2184 9 4 5 5 0 8 0 filepl 152 16162 0 15940 54 37 17 24 0 8 5 lockfpl 104 946 0 944 4 3 1 4 0 8 0 lockfspl 48 289 0 287 1 0 1 1 0 8 0 sessionpl 144 59 0 50 1 0 1 1 0 8 0 pgrppl 48 116 0 99 1 0 1 1 0 8 0 ucredpl 104 3351 0 3338 1 0 1 1 0 8 0 zombiepl 144 2186 0 2178 2 1 1 1 0 8 0 processpl 1160 2249 0 2178 6 0 6 6 0 8 0 procpl 648 4652 0 4574 10 2 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 10 0 10 3 3 0 1 0 8 0 sockpl 664 4962 0 4935 93 85 8 30 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 150 0 0 19 0 19 19 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 79 0 0 2 0 2 2 0 8 0 mbufpl 256 1286 0 0 78 0 78 78 0 8 0 bufpl 280 11260 0 3582 550 1 549 550 0 8 0 anonpl 24 369322 0 364986 189 131 58 78 0 185 19 amapchunkpl 152 61714 0 61211 87 52 35 40 0 158 9 amappl16 200 8088 0 8055 75 66 9 28 0 8 5 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 187 0 175 1 0 1 1 0 8 0 amappl13 176 21 0 21 2 2 0 1 0 8 0 amappl12 168 3410 0 3381 3 1 2 2 0 8 0 amappl11 160 61 0 47 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 162 0 161 2 1 1 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 223 0 210 1 0 1 1 0 8 0 amappl6 120 495 0 494 1 0 1 1 0 8 0 amappl5 112 272 0 261 1 0 1 1 0 8 0 amappl4 104 423 0 403 1 0 1 1 0 8 0 amappl3 96 12243 0 12143 4 0 4 4 0 8 0 amappl2 88 1166 0 1096 2 0 2 2 0 8 0 amappl1 80 15665 0 15098 14 0 14 14 0 8 0 amappl 88 17738 0 17575 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma16384 16384 3 0 3 3 3 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 8 0 8 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 41 0 3 1 0 1 1 0 8 0 uaddrrnd 24 2207 0 2177 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2207 0 2177 1 0 1 1 0 8 0 vmmpekpl 168 18659 0 18598 4 0 4 4 0 8 0 vmmpepl 168 141013 0 139205 134 41 93 106 0 357 3 vmsppl 440 2206 0 2176 6 2 4 5 0 8 0 rwobjpl 56 46294 0 39583 102 6 96 97 0 8 0 pdppl 4096 4421 0 4352 167 96 71 85 0 8 2 pvpl 32 43776 0 0 354 0 354 354 0 265 0 pmappl 248 2206 0 2176 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 616 0 192 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83420ff0) 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+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 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+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff8361b028,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 vwaitforio(fffffd806e182638,0,ffffffff8309f30f,ffffffffffffffff) at vwaitforio+0xd2 ffs_fsync(ffff80002a06aa40) at ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482 end trace frame: 0xffff80002a06aab0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83420ff0) 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+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 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+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8361b028) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff8361b028,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 vwaitforio(fffffd806e182638,0,ffffffff8309f30f,ffffffffffffffff) at vwaitforio+0xd2 ffs_fsync(ffff80002a06aa40) at ffs_fsync+0x376 sys/ufs/ffs/ffs_vnops.c:482 VOP_FSYNC(fffffd806e182638,fffffd807f7d39c0,1,ffff8000ffffdbe8) at VOP_FSYNC+0x108 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffdbe8,ffff80002a06abf0,ffff80002a06ab40) at sys_fsync+0x16f sys/kern/vfs_syscalls.c:2926 syscall(ffff80002a06abf0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a06abf0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ec7ec6f0d00, count: -18 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(ffffffff83076719) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff8354dfd0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(ffffffff8354dfc0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800029fe5630,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800029fe5630,ffff800029fe5668,ffff800029fe5690) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(ffffffff8354dee0,7fbf1e0a5000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800029fe57d0,7fbf1e0a5050) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800029fe57d0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree_list(fffffd807082e000,0) at uvm_anfree_list+0xd6 amap_wipeout(fffffd806e5d3e20) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 uvm_unmap_detach(ffff800029fe5a00,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 end trace frame: 0xffff800029fe5a40, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83076719) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffffffff8354dfd0,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(ffffffff8354dfc0) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff800029fe5630,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800029fe5630,ffff800029fe5668,ffff800029fe5690) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(ffffffff8354dee0,7fbf1e0a5000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800029fe57d0,7fbf1e0a5050) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800029fe57d0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80086f3b00) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree_list(fffffd807082e000,0) at uvm_anfree_list+0xd6 amap_wipeout(fffffd806e5d3e20) at amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 uvm_unmap_detach(ffff800029fe5a00,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd806bdfba50) at uvm_map_teardown+0x35e sys/uvm/uvm_map.c:2518 uvmspace_free(fffffd806bdfba50) at uvmspace_free+0xcd sys/uvm/uvm_map.c:3422 reaper(ffff800029fd8f38) at reaper+0x246 sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -17