panic: uvm_fault_unwire_loWcAkeRd:N aINdGdr:e sSsP Ln oNt OiTn LOmaWEp RESD tONa rtinSgY sStCAacLk Lt r7a3c 48e.7..42 4 EXIT 0 a Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 433615 25174 0 0 0x4000000 1K syz-executor *112338 25174 0 0 0x4000000 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0xebbd7887a20, count: 14 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 *cpu1: uvm_fault_unwire_locked: address not in map ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xebbd7887a20, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a377a80 rbx 0 rdx 0 rcx 0xffff80002a355748 rax 0x37 r8 0xffff80002a3779b0 r9 0 r10 0xd1329608170573b5 r11 0x7de9aa00a17df2d6 r12 0 r13 0 r14 0xffff80002a355748 r15 0 rip 0xffffffff82a863ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a377a00 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=112338 pid=25174 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a3554b8,0xffffffff83929778 process=0xffff80003a815d60 user=0xffff80002a372000, vmspace=0xfffffd800ebc3020 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25174 62502 53055 0 2 0 syz-executor 25174 393478 53055 0 2 0x4000000 syz-executor 25174 433615 53055 0 7 0x4000000 syz-executor *25174 112338 53055 0 7 0x4000000 syz-executor 26372 445266 86043 0 2 0 syz-executor 26372 99116 86043 0 3 0x4000080 bell syz-executor 21960 326712 46743 0 2 0 syz-executor 21960 24860 46743 0 3 0x4000080 fsleep syz-executor 76936 84762 5631 0 2 0 syz-executor 76936 232192 5631 0 3 0x4000080 fsleep syz-executor 71082 75201 98493 0 2 0 syz-executor 71082 245073 98493 0 3 0x4000080 fsleep syz-executor 20802 225573 85801 0 2 0 syz-executor 20802 473911 85801 0 3 0x4000080 fsleep syz-executor 92103 153520 76575 0 3 0x3000 suspend syz-executor 92103 184101 76575 0 2 0x4081000 syz-executor 86043 90691 57342 0 3 0x82 nanoslp syz-executor 53055 40348 57342 0 3 0x82 nanoslp syz-executor 46743 308591 57342 0 3 0x82 nanoslp syz-executor 67355 207558 0 0 3 0x14200 acct acct 98493 67689 57342 0 3 0x82 nanoslp syz-executor 15836 443944 57342 0 3 0x82 nanoslp syz-executor 76575 326704 57342 0 3 0x82 nanoslp syz-executor 13188 276543 1 0 3 0x100083 ttyin getty 85801 50786 57342 0 3 0x82 nanoslp syz-executor 39039 19012 0 0 3 0x14200 bored sosplice 5631 245667 57342 0 3 0x82 nanoslp syz-executor 57342 119938 68500 0 3 0x82 kqread syz-executor 68500 242409 46899 0 3 0x10008a sigsusp ksh 46899 247908 70598 0 3 0x98 kqread sshd-session 70598 356105 50532 0 3 0x92 kqread sshd-session 50532 506822 1 0 3 0x88 kqread sshd 2504 170757 31585 74 3 0x1100092 bpf pflogd 31585 373719 1 0 3 0x80 sbwait pflogd 73359 121407 36258 73 3 0x1100090 kqread syslogd 36258 342442 1 0 3 0x100082 sbwait syslogd 87313 309482 1 0 3 0x100080 kqread resolvd 12107 104978 60520 77 3 0x100092 kqread dhcpleased 99640 457034 60520 77 3 0x100092 kqread dhcpleased 60520 292609 1 0 3 0x80 kqread dhcpleased 19540 429604 0 0 3 0x14200 bored smr 75782 382692 0 0 2 0x14200 zerothread 3373 241240 0 0 3 0x14200 aiodoned aiodoned 68173 112548 0 0 3 0x14200 syncer update 5851 61809 0 0 3 0x14200 cleaner cleaner 20523 426458 0 0 3 0x14200 reaper reaper 78616 278339 0 0 3 0x14200 pgdaemon pagedaemon 63948 508443 0 0 3 0x14200 bored viomb 40986 85675 0 0 3 0x40014200 acpi0 acpi0 88938 77516 0 0 3 0x40014200 idle1 28887 185060 0 0 3 0x14200 bored softnet7 14316 350931 0 0 3 0x14200 bored softnet6 47392 11377 0 0 3 0x14200 bored softnet5 466 225680 0 0 3 0x14200 bored softnet4 58952 222203 0 0 3 0x14200 bored softnet3 35843 454929 0 0 3 0x14200 bored softnet2 77491 282450 0 0 3 0x14200 bored softnet1 14164 440824 0 0 3 0x14200 bored softnet0 5171 46299 0 0 3 0x14200 bored systqmp 71921 298671 0 0 3 0x14200 bored systq 93125 168572 0 0 3 0x14200 tmoslp softclockmp 18890 109065 0 0 3 0x40014200 tmoslp softclock 34285 158689 0 0 3 0x40014200 idle0 1 3563 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83975120) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepages+0x1a8 sys/uvm/uvm_pmemrange.c:1323 #4 uvm_anfree_list+0x1e3 sys/uvm/uvm_anon.c:120 #5 amap_wiperange_chunk+0x1a8 sys/uvm/uvm_amap.c:961 #6 amap_wiperange+0x49e sys/uvm/uvm_amap.c:1039 #7 amap_pp_adjref+0x6f4 sys/uvm/uvm_amap.c:922 #8 amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1300 #9 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #10 sys_munmap+0x32f sys/uvm/uvm_mmap.c:544 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #12 Xsyscall+0x128 Process 25174 (syz-executor) thread 0xffff80002a3554b8 (433615) shared rwlock vmmaplk r = 0 (0xfffffd800ebc3120) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:412 #2 uvm_fault_wire+0x116 uvm_fault_unwire sys/uvm/uvm_fault.c:1765 [inline] #2 uvm_fault_wire+0x116 sys/uvm/uvm_fault.c:1748 #3 uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 #4 physio+0x277 sys/kern/kern_physio.c:139 #5 spec_read+0x155 sys/kern/spec_vnops.c:215 #6 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #7 vn_read+0x17b sys/kern/vfs_vnops.c:369 #8 dofilereadv+0x230 sys/kern/sys_generic.c:252 #9 sys_pread+0xae sys/kern/vfs_syscalls.c:3303 #10 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83927578) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2da sys/kern/kern_synch.c:366 #3 rw_do_enter_read+0x30c sys/kern/kern_rwlock.c:392 #4 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1924 #5 uvm_fault_check+0x4a sys/uvm/uvm_fault.c:741 #6 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #7 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1745 #8 uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 #9 physio+0x277 sys/kern/kern_physio.c:139 #10 spec_read+0x155 sys/kern/spec_vnops.c:215 #11 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #12 vn_read+0x17b sys/kern/vfs_vnops.c:369 #13 dofilereadv+0x230 sys/kern/sys_generic.c:252 #14 sys_pread+0xae sys/kern/vfs_syscalls.c:3303 #15 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #15 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #16 Xsyscall+0x128 Process 25174 (syz-executor) thread 0xffff80002a355748 (112338) exclusive rwlock amaplk r = 0 (0xfffffd8063411d88) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 amap_unref+0x3d sys/uvm/uvm_amap.c:1331 #3 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #4 sys_munmap+0x32f sys/uvm/uvm_mmap.c:544 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83975120) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepages+0x1a8 sys/uvm/uvm_pmemrange.c:1323 #4 uvm_anfree_list+0x1e3 sys/uvm/uvm_anon.c:120 #5 amap_wiperange_chunk+0x1a8 sys/uvm/uvm_amap.c:961 #6 amap_wiperange+0x49e sys/uvm/uvm_amap.c:1039 #7 amap_pp_adjref+0x6f4 sys/uvm/uvm_amap.c:922 #8 amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1300 #9 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #10 sys_munmap+0x32f sys/uvm/uvm_mmap.c:544 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #12 Xsyscall+0x128 Process 92103 (syz-executor) thread 0xffff80003c49f9d0 (184101) exclusive rwlock vmmaplk r = 0 (0xfffffd800ebc3308) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x8a5 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x8a5 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:283 #7 kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 #8 alltraps_kern_meltdown+0x7b #9 _copyin+0x57 #10 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10251 11130K 12746K 166960K 18604 0 pcb 17 16K 18K 166960K 1246 0 rtable 236 14K 15K 166960K 1029 0 pf 37 18K 81K 166960K 505 0 ifaddr 41 8K 9K 166960K 275 0 ifgroup 59 2K 2K 166960K 463 0 sysctl 4 1K 9K 166960K 37 0 counters 70 37K 38K 166960K 646 0 ioctlops 0 0K 4K 166960K 2753 0 iov 0 0K 40K 166960K 343 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1534 96K 97K 166960K 6105 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 28K 166960K 56 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 313 0 dirhash 12 2K 2K 166960K 87 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 244K 166960K 4750 0 sigio 1 0K 0K 166960K 113 0 proc 72 115K 164K 166960K 1421 0 subproc 72 4K 4K 166960K 192 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1050 0 in_multi 79 5K 7K 166960K 393 0 ether_multi 1 0K 0K 166960K 30 0 mrt 1 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 1149 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 256 158K 174K 166960K 45299 0 UVM aobj 157 6K 6K 166960K 158 0 pinsyscall 43 86K 103K 166960K 6192 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 222 0 NDP 13 0K 2K 166960K 203 0 temp 82 8684K 8781K 166960K 196986 0 kqueue 14 22K 34K 166960K 927 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 672 0 668 7 6 1 3 0 8 0 rtentry 176 332 0 248 5 0 5 5 0 8 0 unpcb 144 3717 0 3698 22 21 1 6 0 8 0 syncache 336 11 0 11 3 3 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1619 0 1614 34 33 1 7 0 8 0 arp 128 44 0 32 1 0 1 1 0 8 0 inpcb 328 5418 0 5409 50 48 2 13 0 8 0 nd6 144 56 0 37 1 0 1 1 0 8 0 pkpcb 40 41 0 41 5 4 1 1 0 8 1 kcovpl 48 21 0 13 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 247 0 247 6 5 1 1 0 8 1 pppxif 1504 13 0 13 6 6 0 1 0 8 0 pffrag 232 51 0 46 1 0 1 1 0 482 0 pffrnode 88 50 0 45 1 0 1 1 0 8 0 pffrent 40 108 0 103 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 5 0 5 3 3 0 1 0 8 0 pfstitem 24 317 0 169 1 0 1 1 0 8 0 pfstkey 128 317 0 169 6 0 6 6 0 8 0 pfstate 384 317 0 169 17 1 16 16 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1629 0 1263 39 13 26 32 0 8 0 art_table 40 1633 0 1263 6 0 6 6 0 8 0 art_node 32 327 0 257 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 2 1 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 305 0 295 1 0 1 1 0 8 0 shmpl 112 155 0 1 5 0 5 5 0 8 0 dirhash 1024 69 0 52 3 0 3 3 0 8 0 dino2pl 256 10199 0 8662 97 0 97 97 0 8 0 ffsino 296 10199 0 8662 119 0 119 119 0 8 0 nchpl 144 16837 0 16263 65 40 25 65 0 8 0 rtmask 32 39 0 39 7 6 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 62252 0 62252 9 8 1 2 0 8 1 percpumem 16 338 0 288 1 0 1 1 0 8 0 kstatmem 264 326 0 296 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 15 0 15 6 6 0 1 0 8 0 scxspl 216 124973 0 124973 17 16 1 8 1 8 1 plimitpl 152 1047 0 1030 1 0 1 1 0 8 0 sigapl 424 5012 0 4956 7 0 7 7 0 8 0 knotepl 120 826 0 0 23 0 23 23 0 8 0 kqueuepl 224 1904 0 1893 17 16 1 5 0 8 0 pipepl 344 751 0 723 20 17 3 9 0 8 0 fdescpl 528 4972 0 4940 3 0 3 3 0 8 0 filepl 160 36797 0 36571 36 23 13 18 0 8 0 lockfpl 104 2959 0 2955 6 5 1 3 0 8 0 lockfspl 48 1236 0 1232 2 1 1 2 0 8 0 sessionpl 144 43 0 34 1 0 1 1 0 8 0 pgrppl 48 227 0 210 1 0 1 1 0 8 0 ucredpl 104 6587 0 6574 1 0 1 1 0 8 0 zombiepl 144 6219 0 6217 4 3 1 1 0 8 0 processpl 1248 5012 0 4956 5 0 5 5 0 8 0 procpl 656 12618 0 12553 8 1 7 7 0 8 0 sosppl 168 37 0 37 7 6 1 1 0 8 1 sockpl 752 10031 0 9999 98 93 5 18 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 43 0 0 6 1 5 5 0 8 0 mtagpl 96 197 0 0 5 0 5 5 0 8 0 mbufpl 256 1239 0 0 77 0 77 77 0 8 0 bufpl 280 49672 0 43529 440 0 440 440 0 8 0 anonpl 32 18057 0 0 146 0 146 146 0 246 0 amapchunkpl 152 156182 0 155504 67 38 29 35 0 158 1 amappl16 200 17821 0 17673 101 90 11 40 0 8 0 amappl15 192 36 0 36 2 2 0 1 0 8 0 amappl14 184 159 0 146 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 2 0 1 0 8 0 amappl12 168 5848 0 5816 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 8 0 8 2 2 0 1 0 8 0 amappl9 144 252 0 251 3 2 1 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 147 0 135 1 0 1 1 0 8 0 amappl6 120 312 0 308 1 0 1 1 0 8 0 amappl5 112 193 0 181 1 0 1 1 0 8 0 amappl4 104 420 0 400 1 0 1 1 0 8 0 amappl3 96 31951 0 31823 6 2 4 4 0 8 0 amappl2 88 968 0 902 2 0 2 2 0 8 0 amappl1 80 29040 0 28428 18 3 15 16 0 8 0 amappl 88 43462 0 43279 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 260 0 260 7 7 0 1 0 8 0 dma64 64 10 0 10 4 4 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 157 0 1 3 0 3 3 0 8 0 uaddrrnd 24 4972 0 4940 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4972 0 4940 1 0 1 1 0 8 0 vmmpekpl 168 37064 0 37001 4 0 4 4 0 8 0 vmmpepl 168 315034 0 312819 164 61 103 124 0 357 0 vmsppl 488 4971 0 4940 5 0 5 5 0 8 0 rwobjpl 80 85212 0 78043 165 12 153 159 0 8 0 pdppl 4096 9952 0 9880 126 54 72 84 0 8 0 pvpl 32 27222 0 0 220 1 219 219 0 265 0 pmappl 256 4971 0 4940 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 429 0 121 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xebbd7887a20, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 db_elf_sym_search(ffffffff81d398b0,0,ffff80002a371220) at db_elf_sym_search+0xac sys/ddb/db_elf.c:290 db_search_symbol(ffffffff81d398b0,0,ffff80002a371290) at db_search_symbol+0x52 sys/ddb/db_sym.c:106 db_stack_trace_print(ffff80002a371360,1,100,ffffffff833a1ee3,ffffffff81d39ed0) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147 db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243 panic(ffffffff83437ffe) at panic+0x1d0 sys/kern/subr_prf.c:229 uvm_fault_unwire_locked(fffffd800ebc3020,200000360000,20000036b000) at uvm_fault_unwire_locked+0x4de uvm_fault_wire(fffffd800ebc3020,200000360000,200000371000,3) at uvm_fault_wire+0x12d uvm_fault_unwire sys/uvm/uvm_fault.c:1766 [inline] uvm_fault_wire(fffffd800ebc3020,200000360000,200000371000,3) at uvm_fault_wire+0x12d sys/uvm/uvm_fault.c:1748 uvm_vslock_device(ffff80002a3554b8,200000360040,10000,3,ffff80002a371620) at uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 physio(ffffffff8203c040,d02,8000,ffffffff8203c8a0,ffff80002a3718d8) at physio+0x277 sys/kern/kern_physio.c:139 spec_read(ffff80002a371740) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8062b063c0,ffff80002a3718d8,0,fffffd80097fb270) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 end trace frame: 0xffff80002a371830, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 db_elf_sym_search(ffffffff81d398b0,0,ffff80002a371220) at db_elf_sym_search+0xac sys/ddb/db_elf.c:290 db_search_symbol(ffffffff81d398b0,0,ffff80002a371290) at db_search_symbol+0x52 sys/ddb/db_sym.c:106 db_stack_trace_print(ffff80002a371360,1,100,ffffffff833a1ee3,ffffffff81d39ed0) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147 db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243 panic(ffffffff83437ffe) at panic+0x1d0 sys/kern/subr_prf.c:229 uvm_fault_unwire_locked(fffffd800ebc3020,200000360000,20000036b000) at uvm_fault_unwire_locked+0x4de uvm_fault_wire(fffffd800ebc3020,200000360000,200000371000,3) at uvm_fault_wire+0x12d uvm_fault_unwire sys/uvm/uvm_fault.c:1766 [inline] uvm_fault_wire(fffffd800ebc3020,200000360000,200000371000,3) at uvm_fault_wire+0x12d sys/uvm/uvm_fault.c:1748 uvm_vslock_device(ffff80002a3554b8,200000360040,10000,3,ffff80002a371620) at uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 physio(ffffffff8203c040,d02,8000,ffffffff8203c8a0,ffff80002a3718d8) at physio+0x277 sys/kern/kern_physio.c:139 spec_read(ffff80002a371740) at spec_read+0x155 sys/kern/spec_vnops.c:215 VOP_READ(fffffd8062b063c0,ffff80002a3718d8,0,fffffd80097fb270) at VOP_READ+0x102 sys/kern/vfs_vops.c:227 vn_read(fffffd806c8e6298,ffff80002a3718d8,1) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a3554b8,4,ffff80002a3718d8,1,ffff80002a371990) at dofilereadv+0x230 sys/kern/sys_generic.c:252 sys_pread(ffff80002a3554b8,ffff80002a371a40,ffff80002a371990) at sys_pread+0xae sys/kern/vfs_syscalls.c:3303 syscall(ffff80002a371a40) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a371a40) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xebbdbcc49e0, count: -19