panic:WA kRerNnIeNlG: dSPL iNaOgnoTsti c LOWEasREserDt iOoN nT R"A(Ppg E->XpITg_ fal a0gs Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *106615 26020 0 0 0 0 syz-executor 162632 30450 0 0 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f53f1004000, 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: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1309 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f53f1004000, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c419f10 rbx 0 rdx 0 rcx 0xffff8000fffe9248 rax 0x2a r8 0xffff80003c419e40 r9 0 r10 0x754fc39db2b1be1 r11 0xc6cef28e45778225 r12 0 r13 0xffffffff829f25b8 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8293e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c419e90 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=106615 pid=26020 tcnt=2 stat=onproc flags process=0 proc=0 runpri=81, usrpri=81, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe9778,0xffff80002a270fb8 process=0xffff8000fffcdd08 user=0xffff80003c414000, vmspace=0xfffffd805db529b8 estcpu=31, cpticks=4, pctcpu=0.0, user=2, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66702 248786 63775 0 3 0x80 nanoslp syz-executor 66702 68748 63775 0 3 0x4000080 fsleep syz-executor 42879 365963 67812 0 2 0 syz-executor 42879 489506 67812 0 3 0x4000080 fsleep syz-executor *26020 106615 19019 0 7 0 syz-executor 26020 395236 19019 0 2 0x4000000 syz-executor 30450 162632 86865 0 7 0 syz-executor 30450 377975 86865 0 3 0x4000080 fsleep syz-executor 50701 120802 47422 0 2 0 syz-executor 50701 194200 47422 0 3 0x4000080 fsleep syz-executor 50701 323356 47422 0 3 0x4000080 fsleep syz-executor 14847 202928 1 0 3 0x100083 ttyin getty 45081 179511 0 0 3 0x14200 acct acct 73574 459738 0 0 3 0x14280 nfsidl nfsio 46851 450508 0 0 3 0x14280 nfsidl nfsio 10205 322300 0 0 3 0x14280 nfsidl nfsio 2307 328346 0 0 3 0x14280 nfsidl nfsio 43567 342221 0 0 3 0x14280 nfsidl nfsio 29979 369252 0 0 3 0x14280 nfsidl nfsio 74928 102790 0 0 3 0x14280 nfsidl nfsio 9170 189846 0 0 3 0x14280 nfsidl nfsio 8963 98471 0 0 3 0x14280 nfsidl nfsio 9764 247427 0 0 3 0x14280 nfsidl nfsio 52602 1239 0 0 3 0x14280 nfsidl nfsio 5186 481489 0 0 3 0x14280 nfsidl nfsio 7375 463876 0 0 3 0x14280 nfsidl nfsio 53678 174607 0 0 3 0x14280 nfsidl nfsio 44343 399597 0 0 3 0x14280 nfsidl nfsio 12140 343078 0 0 3 0x14280 nfsidl nfsio 85825 214152 0 0 3 0x14280 nfsidl nfsio 59835 344121 0 0 3 0x14280 nfsidl nfsio 87863 401507 0 0 3 0x14280 nfsidl nfsio 92141 84008 0 0 3 0x14280 nfsidl nfsio 86865 72420 28259 0 3 0x82 nanoslp syz-executor 19019 425552 28259 0 3 0x82 nanoslp syz-executor 63775 455690 28259 0 3 0x82 nanoslp syz-executor 44309 155498 28259 0 3 0x82 nanoslp syz-executor 4601 207574 28259 0 3 0x82 nanoslp syz-executor 67812 204821 28259 0 3 0x82 nanoslp syz-executor 47422 70925 28259 0 3 0x82 nanoslp syz-executor 9713 2767 28259 0 3 0x2 biowait syz-executor 28259 273206 95821 0 3 0x82 kqread syz-executor 95821 194781 46373 0 3 0x10008a sigsusp ksh 46373 18060 89246 0 3 0x98 kqread sshd-session 89246 308803 21343 0 3 0x92 kqread sshd-session 21343 104674 1 0 3 0x88 kqread sshd 60322 32660 18601 74 3 0x1100092 bpf pflogd 18601 427430 1 0 3 0x80 sbwait pflogd 94431 165729 41680 73 3 0x1100090 kqread syslogd 41680 248966 1 0 3 0x100082 sbwait syslogd 61648 341331 1 0 3 0x100080 kqread resolvd 57604 53909 65650 77 3 0x100092 kqread dhcpleased 84688 68034 65650 77 3 0x100092 kqread dhcpleased 65650 267930 1 0 3 0x80 kqread dhcpleased 10893 184161 0 0 3 0x14200 bored smr 72164 57426 0 0 2 0x14200 zerothread 36007 469814 0 0 3 0x14200 aiodoned aiodoned 11300 475012 0 0 3 0x14200 syncer update 22049 426436 0 0 3 0x14200 cleaner cleaner 39841 429537 0 0 2 0x14200 reaper 2104 344796 0 0 3 0x14200 pgdaemon pagedaemon 43223 297585 0 0 3 0x14200 bored viomb 60742 52262 0 0 3 0x40014200 acpi0 acpi0 49002 273671 0 0 3 0x40014200 idle1 44813 303049 0 0 3 0x14200 bored softnet1 9116 459639 0 0 3 0x14200 bored softnet0 54238 179058 0 0 3 0x14200 bored systqmp 3390 183641 0 0 3 0x14200 bored systq 70595 506290 0 0 3 0x14200 tmoslp softclockmp 43846 446009 0 0 3 0x40014200 tmoslp softclock 30096 177666 0 0 3 0x40014200 idle0 1 37318 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 (0xffffffff839e74c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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:-1 #4 pmap_do_remove+0x89f sys/arch/amd64/amd64/pmap.c:1939 #5 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #6 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #6 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #7 exit1+0x6fc sys/kern/kern_exit.c:260 #8 sys_exit+0x1a sys/kern/kern_exit.c:-1 #9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 Process 30450 (syz-executor) thread 0xffff8000fffe9778 (162632) exclusive rwlock uobjlk r = 0 (0xfffffd806066bea8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd805db52130) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 #7 recall_trap+0x8 Process 9713 (syz-executor) thread 0xffff8000ffffd4c8 (2767) exclusive rrwlock inode r = 0 (0xfffffd806e89f488) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80709eed80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 11124K 12632K 166960K 13239 0 pcb 17 16K 20K 166960K 331 0 rtable 177 7K 8K 166960K 500 0 pf 29 16K 18K 166960K 121 0 ifaddr 32 5K 7K 166960K 87 0 ifgroup 43 2K 2K 166960K 132 0 sysctl 3 1K 9K 166960K 17 0 counters 64 36K 37K 166960K 154 0 ioctlops 0 0K 4K 166960K 1633 0 iov 0 0K 16K 166960K 127 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1453 91K 92K 166960K 2355 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 23 137K 137K 166960K 31 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 86K 110K 166960K 1025 0 sigio 0 0K 0K 166960K 22 0 proc 72 115K 163K 166960K 676 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 102 0 in_multi 65 4K 7K 166960K 139 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 500 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 245 177K 198K 166960K 11328 0 UVM aobj 24 10K 12K 166960K 27 0 pinsyscall 41 82K 105K 166960K 2192 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 68 0 NDP 9 0K 2K 166960K 55 0 temp 69 8677K 8744K 166960K 49602 0 kqueue 13 20K 32K 166960K 205 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 120 187 0 184 3 0 3 3 0 8 2 rtentry 176 152 0 81 6 0 6 6 0 8 0 unpcb 144 606 0 589 5 1 4 4 0 8 3 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 3 0 3 2 1 1 1 0 8 1 tcpcb 736 275 0 268 4 0 4 4 0 8 2 arp 136 22 0 9 1 0 1 1 0 8 0 inpcb 328 1069 0 1059 15 6 9 10 0 8 8 nd6 152 28 0 13 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 34 0 34 1 0 1 1 0 8 1 pppxif 1504 6 0 6 3 2 1 1 0 8 1 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 9 0 3 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 4 0 4 2 2 0 1 0 8 0 pfstitem 24 76 0 27 1 0 1 1 0 8 0 pfstkey 128 76 0 27 2 0 2 2 0 8 0 pfstate 448 76 0 27 6 0 6 6 0 8 0 pfrule 1344 27 0 22 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 631 0 318 29 8 21 29 0 8 0 art_table 40 634 0 318 5 0 5 5 0 8 0 art_node 32 151 0 88 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 26 0 5 1 0 1 1 0 8 0 shmpl 112 18 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3283 0 1781 96 1 95 96 0 8 0 ffsino 296 3283 0 1781 117 0 117 117 0 8 0 nchpl 144 4761 0 3059 64 0 64 64 0 8 0 rtmask 32 5 0 5 3 2 1 1 0 8 1 vnodes 216 3996 0 0 222 0 222 222 0 8 0 namei 1024 15470 0 15469 2 1 1 2 0 8 0 percpumem 16 92 0 45 1 0 1 1 0 8 0 vcpupl 3968 5 0 1 1 0 1 1 0 8 0 vmpool 840 6 0 2 1 0 1 1 0 8 0 kstatmem 264 76 0 56 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 30529 0 30528 6 5 1 4 1 8 0 plimitpl 152 272 0 254 1 0 1 1 0 8 0 sigapl 424 1361 0 1293 8 0 8 8 0 8 0 knotepl 120 748 0 0 23 0 23 23 0 8 0 kqueuepl 224 416 0 407 6 4 2 5 0 8 1 pipepl 344 200 0 173 3 0 3 3 0 8 0 fdescpl 528 1318 0 1288 3 0 3 3 0 8 0 filepl 160 7999 0 7780 23 6 17 23 0 8 6 lockfpl 104 667 0 663 4 3 1 4 0 8 0 lockfspl 48 184 0 181 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 1198 0 1183 1 0 1 1 0 8 0 zombiepl 144 1295 0 1293 1 0 1 1 0 8 0 processpl 1232 1361 0 1293 6 0 6 6 0 8 0 procpl 664 2926 0 2852 8 0 8 8 0 8 1 sosppl 176 5 0 5 1 1 0 1 0 8 0 sockpl 752 1912 0 1882 26 12 14 20 0 8 10 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 24 0 0 1 0 1 1 0 8 0 mbufpl 256 733 0 0 46 0 46 46 0 8 0 bufpl 280 12383 0 6246 439 0 439 439 0 8 0 anonpl 32 10200 0 0 83 0 83 83 0 246 0 amapchunkpl 152 38431 0 37834 36 5 31 32 0 158 5 amappl16 200 5429 0 5393 45 32 13 24 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 39 0 39 1 1 0 1 0 8 0 amappl13 176 437 0 436 1 0 1 1 0 8 0 amappl12 168 1718 0 1677 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 48 0 33 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 298 0 284 1 0 1 1 0 8 0 amappl5 112 78 0 67 1 0 1 1 0 8 0 amappl4 104 449 0 417 1 0 1 1 0 8 0 amappl3 96 7393 0 7289 5 1 4 4 0 8 0 amappl2 88 576 0 516 2 0 2 2 0 8 0 amappl1 80 13792 0 13204 15 1 14 14 0 8 0 amappl 88 10371 0 10208 5 0 5 5 0 92 0 uvmvnodes 80 145 0 0 3 0 3 3 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 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 26 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1318 0 1288 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1318 0 1288 1 0 1 1 0 8 0 vmmpekpl 168 12449 0 12411 3 0 3 3 0 8 0 vmmpepl 168 91457 0 89573 111 8 103 106 0 357 8 vmsppl 488 1317 0 1287 7 2 5 5 0 8 0 rwobjpl 80 27357 0 26261 33 3 30 31 0 8 0 pdppl 4096 2655 0 2582 114 38 76 85 0 8 3 pvpl 32 17402 0 0 141 0 141 141 0 265 0 pmappl 256 1323 0 1289 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 336 0 54 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f53f1004000, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(26) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(26) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833850a9) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff833adf27) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff833f0c16,ffffffff833e0b18,51d,ffffffff8341d8f1) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageactivate(fffffd80088818f8) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306 uvm_fault_lower(ffff80003c40dfd0,ffff80003c40e008,ffff80003c40df50) at uvm_fault_lower+0x25c sys/uvm/uvm_fault.c:1379 uvm_fault(fffffd805db52030,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 end trace frame: 0xffff80003c40e100, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1269 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(26) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(26) at db_putchar+0x126 sys/ddb/db_output.c:153 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833850a9) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff833adf27) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff833f0c16,ffffffff833e0b18,51d,ffffffff8341d8f1) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageactivate(fffffd80088818f8) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306 uvm_fault_lower(ffff80003c40dfd0,ffff80003c40e008,ffff80003c40df50) at uvm_fault_lower+0x25c sys/uvm/uvm_fault.c:1379 uvm_fault(fffffd805db52030,200000000000,0,2) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 upageflttrap(ffff80003c40e170,200000000040) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c40e170) at usertrap+0x42f sys/arch/amd64/amd64/trap.c:632 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x798addb433c0, count: -17