panic: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1207 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 466636 96601 32767 0x1010 0x4080000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834bc089) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f85b7,ffffffff8344a9a4,4b7,ffffffff8344a9d9) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffc8008dfef68) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206 uvm_fault_unwire_locked(fffffc806b371030,539fbe48000,539fc247000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffc806b371030,fffffc806d03c0e8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff800045fee2b0,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff800045fee2b0,ffff800039fd1d40,ffff800039fd1c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800039fd1d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fd1d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e5f0e781270, count: 4 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: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1207 ddb{1}> show kasan No such command ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834bc089) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f85b7,ffffffff8344a9a4,4b7,ffffffff8344a9d9) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffc8008dfef68) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206 uvm_fault_unwire_locked(fffffc806b371030,539fbe48000,539fc247000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffc806b371030,fffffc806d03c0e8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff800045fee2b0,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff800045fee2b0,ffff800039fd1d40,ffff800039fd1c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800039fd1d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fd1d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e5f0e781270, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800039fd1960 rbx 0xffff80002999ee07 rdx 0 rcx 0xffff800045fee2b0 rax 0xffff80002999dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6744a81813144593 r11 0x194c93b030e23976 r12 0xffff80002999ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff811083e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800039fd1950 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=162056 pid=27765 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=57, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800045fee2b0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800039bb9778,0xffff800039bb9a20 process=0xffff8000397ace90 user=0xffff800039fcc000, vmspace=0xfffffc806b371030 estcpu=7, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 46122 296162 20456 0 2 0x2 0 syz-executor 6952 119842 87386 32767 2 0x10 0 syz-executor 6952 256419 87386 32767 3 0x10 0x4000080 fsleep syz-executor 6952 338947 87386 32767 3 0x10 0x4000080 fsleep syz-executor 29833 13460 20152 32767 2 0x10 0 syz-executor 29833 226921 20152 32767 3 0x10 0x4000080 fsleep syz-executor 29833 290852 20152 32767 3 0x10 0x4000080 fsleep syz-executor 96601 458171 74499 32767 3 0x1010 0x2000 suspend syz-executor 96601 466636 74499 32767 7 0x1010 0x4080000 syz-executor 74499 104732 2452 32767 3 0x10 0x80 wait syz-executor 44057 491386 97762 32767 2 0x10 0 syz-executor 4836 90161 12888 32767 2 0x10 0xc80 syz-executor 38223 238246 40090 32767 3 0x10 0x80 piperd syz-executor 20152 359925 29220 32767 2 0x10 0xc80 syz-executor 87386 512580 24312 32767 2 0x10 0xc80 syz-executor 21306 192131 79944 32767 2 0x10 0 syz-executor 2452 8474 20456 0 3 0x2 0x80 wait syz-executor 12888 188625 20456 0 3 0x2 0x80 wait syz-executor 24312 277225 20456 0 3 0x2 0x80 wait syz-executor 97762 359390 20456 0 3 0x2 0x80 wait syz-executor 79944 290083 20456 0 3 0x2 0x80 wait syz-executor 29220 446958 20456 0 3 0x2 0x80 wait syz-executor 40090 442013 20456 0 3 0x2 0x80 wait syz-executor 20456 93266 73752 0 2 0x2 0 syz-executor 73752 428226 98197 0 3 0x100002 0x88 sigsusp ksh 98197 418136 87754 0 3 0x10 0x88 kqread sshd-session 87754 212727 41052 0 3 0x12 0x80 kqread sshd-session 25808 19457 1 0 3 0x100003 0x80 ttyin getty 41052 278428 1 0 3 0 0x88 kqread sshd 50964 102011 15888 73 2 0x1100010 0x80 syslogd 15888 55445 1 0 3 0x100002 0x80 sbwait syslogd 77347 261989 1 0 3 0x100000 0x80 kqread resolvd 18211 423167 72507 77 3 0x100012 0x80 kqread dhcpleased 76171 179960 72507 77 3 0x100012 0x80 kqread dhcpleased 72507 487629 1 0 3 0 0x80 kqread dhcpleased 81512 13881 0 0 3 0x14000 0x200 bored smr 20771 254485 0 0 2 0x14000 0x200 zerothread 8856 7973 0 0 3 0x14000 0x200 aiodoned aiodoned 790 19704 0 0 3 0x14000 0x200 syncer update 19156 458335 0 0 3 0x14000 0x200 cleaner cleaner 2430 127136 0 0 3 0x14000 0x200 reaper reaper 4469 423038 0 0 3 0x14000 0x200 pgdaemon pagedaemon 34738 83011 0 0 3 0x14000 0x200 bored viomb 93047 71197 0 0 3 0x14000 0x40000200 acpi0 acpi0 68011 189633 0 0 3 0x14000 0x40000200 idle1 53202 75542 0 0 3 0x14000 0x200 bored softnet1 91767 402904 0 0 3 0x14000 0x200 bored softnet0 97652 374459 0 0 3 0x14000 0x200 bored systqmp 90108 458910 0 0 3 0x14000 0x200 bored systq 12956 20545 0 0 3 0x14000 0x200 tmoslp softclockmp 272 403389 0 0 3 0x14000 0x40000200 tmoslp softclock 60806 370789 0 0 3 0x14000 0x40000200 idle0 1 306046 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 96601 (syz-executor) thread 0xffff800039bb9778 (466636) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a4a640) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 uiomove+0x251 sys/kern/kern_subr.c:140 #3 ptcwrite+0x193 sys/kern/tty_pty.c:551 #4 spec_write+0x11f sys/kern/spec_vnops.c:302 #5 VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 #6 vn_write+0x1d3 sys/kern/vfs_vnops.c:414 #7 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #8 sys_writev+0xd8 sys/kern/sys_generic.c:327 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #10 Xsyscall+0x128 Process 44057 (syz-executor) thread 0xffff800039bb87e8 (491386) exclusive rrwlock inode r = 0 (0xfffffc806b0de690) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffc806d8c57a0) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 21306 (syz-executor) thread 0xffff800045feefa8 (192131) exclusive rrwlock inode r = 0 (0xfffffc806d470d70) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffc806d8c5300) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11053 12017K 12034K 166960K 12147 0 pcb 17 12K 12K 166960K 17 0 rtable 217 6K 7K 166960K 363 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 35 0 iov 0 0K 8K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1392 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 16 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 20 73K 117K 166960K 265 0 proc 58 99K 147K 166960K 509 0 subproc 68 4K 4K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 64 0 in_multi 88 6K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 371 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 217 144K 159K 166960K 4036 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 41 82K 111K 166960K 1368 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 10 0K 2K 166960K 27 0 temp 34 9114K 9134K 166960K 4031 0 kqueue 16 22K 27K 166960K 57 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 50 0 45 1 0 1 1 0 8 0 rtentry 176 113 0 13 6 0 6 6 0 8 0 unpcb 144 152 0 137 4 0 4 4 0 8 3 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpcb 736 86 0 82 4 3 1 4 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 258 0 249 4 2 2 4 0 8 1 nd6 152 26 0 4 1 0 1 1 0 8 0 kcovpl 48 11 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 469 0 46 30 0 30 30 0 8 2 art_table 40 470 0 46 5 0 5 5 0 8 0 art_node 32 113 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 72 12 0 2 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1716 0 249 92 0 92 92 0 8 0 ffsino 296 1716 0 249 114 0 114 114 0 8 0 nchpl 144 2045 0 352 63 0 63 63 0 8 0 vnodes 216 1829 0 0 102 0 102 102 0 8 0 namei 1024 6228 0 6228 2 1 1 2 0 8 1 percpumem 16 51 0 1 1 0 1 1 0 8 0 kstatmem 264 25 0 2 2 0 2 2 0 8 0 scxspl 216 6888 0 6888 3 2 1 3 1 8 1 plimitpl 152 64 0 39 2 0 2 2 0 8 0 sigapl 424 556 0 507 7 0 7 7 0 8 0 knotepl 120 295 0 0 9 0 9 9 0 8 0 kqueuepl 224 60 0 50 2 0 2 2 0 8 1 pipepl 344 141 0 114 3 0 3 3 0 8 0 fdescpl 528 540 0 508 3 0 3 3 0 8 0 filepl 160 2320 0 2110 14 1 13 13 0 8 1 lockfpl 104 40 0 38 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 31 0 16 1 0 1 1 0 8 0 pgrppl 48 46 0 23 1 0 1 1 0 8 0 ucredpl 104 251 0 233 1 0 1 1 0 8 0 zombiepl 144 509 0 507 1 0 1 1 0 8 0 processpl 1232 556 0 507 5 0 5 5 0 8 0 procpl 664 752 0 698 6 0 6 6 0 8 0 sockpl 752 460 0 431 12 1 11 11 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k 2048 12 0 0 2 0 2 2 0 8 0 mextrefs 64 13 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 195 0 0 13 0 13 13 0 8 0 bufpl 272 4637 0 102 303 0 303 303 0 8 0 anonpl 32 8174 0 0 66 0 66 66 0 247 0 amapchunkpl 152 11820 0 11099 32 1 31 31 0 158 0 amappl16 200 2216 0 2196 15 2 13 14 0 8 8 amappl15 192 98 0 98 1 1 0 1 0 8 0 amappl14 184 414 0 413 1 0 1 1 0 8 0 amappl13 176 116 0 106 1 0 1 1 0 8 0 amappl12 168 780 0 747 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 60 0 50 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 1 0 1 0 8 0 amappl8 136 96 0 95 1 0 1 1 0 8 0 amappl7 128 140 0 129 1 0 1 1 0 8 0 amappl6 120 151 0 150 1 0 1 1 0 8 0 amappl5 112 96 0 89 1 0 1 1 0 8 0 amappl4 104 264 0 249 1 0 1 1 0 8 0 amappl3 96 2142 0 2034 4 0 4 4 0 8 0 amappl2 88 522 0 467 2 0 2 2 0 8 0 amappl1 80 10649 0 10086 14 1 13 14 0 8 0 amappl 88 3328 0 3171 5 0 5 5 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 540 0 507 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 540 0 507 1 0 1 1 0 8 0 vmmpekpl 168 6271 0 6233 3 0 3 3 0 8 0 vmmpepl 168 43557 0 41711 101 1 100 100 0 357 12 vmsppl 488 539 0 507 7 1 6 6 0 8 0 rwobjpl 80 15703 0 14783 25 0 25 25 0 8 1 pdppl 4096 1087 0 1014 119 38 81 95 0 8 8 pvpl 32 29415 0 0 238 0 238 238 0 265 0 pmappl 256 539 0 507 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 593 0 46 16 0 16 16 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8399eff0) 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 ttyoutput(1ff,ffff800001635000) at ttyoutput+0x8fa sys/kern/tty.c:707 ttyretype(ffff800001635000) at ttyretype+0x5fa sys/kern/tty.c:-1 ttyinput(0,ffff800001635000) at ttyinput+0x1d4b sys/kern/tty.c:345 ptcwrite(608,ffff800039fc71a0,1) at ptcwrite+0x317 sys/kern/tty_pty.c:567 spec_write(ffff800039fc6f70) at spec_write+0x11f sys/kern/spec_vnops.c:302 VOP_WRITE(fffffc806f70a7f8,ffff800039fc71a0,1,fffffc80097fd4e0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffc806d0d7410,ffff800039fc71a0,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800039bb9778,8,ffff800039fc71a0,0,ffff800039fc7260) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_writev(ffff800039bb9778,ffff800039fc7310,ffff800039fc7260) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff800039fc7310) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fc7310) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6d068fa07b0, count: 1 ddb{0}> trace x86_ipi_db(ffffffff8399eff0) 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 ttyoutput(1ff,ffff800001635000) at ttyoutput+0x8fa sys/kern/tty.c:707 ttyretype(ffff800001635000) at ttyretype+0x5fa sys/kern/tty.c:-1 ttyinput(0,ffff800001635000) at ttyinput+0x1d4b sys/kern/tty.c:345 ptcwrite(608,ffff800039fc71a0,1) at ptcwrite+0x317 sys/kern/tty_pty.c:567 spec_write(ffff800039fc6f70) at spec_write+0x11f sys/kern/spec_vnops.c:302 VOP_WRITE(fffffc806f70a7f8,ffff800039fc71a0,1,fffffc80097fd4e0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffc806d0d7410,ffff800039fc71a0,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:414 dofilewritev(ffff800039bb9778,8,ffff800039fc71a0,0,ffff800039fc7260) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_writev(ffff800039bb9778,ffff800039fc7310,ffff800039fc7260) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff800039fc7310) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fc7310) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6d068fa07b0, count: -14 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:438 panic(ffffffff834bc089) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f85b7,ffffffff8344a9a4,4b7,ffffffff8344a9d9) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffc8008dfef68) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206 uvm_fault_unwire_locked(fffffc806b371030,539fbe48000,539fc247000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffc806b371030,fffffc806d03c0e8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff800045fee2b0,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff800045fee2b0,ffff800039fd1d40,ffff800039fd1c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800039fd1d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fd1d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e5f0e781270, count: 4 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834bc089) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff834f85b7,ffffffff8344a9a4,4b7,ffffffff8344a9d9) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffc8008dfef68) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1206 uvm_fault_unwire_locked(fffffc806b371030,539fbe48000,539fc247000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffc806b371030,fffffc806d03c0e8,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffc806b371030) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff800045fee2b0,0,0,1) at exit1+0x71b sys/kern/kern_exit.c:260 sys_exit(ffff800045fee2b0,ffff800039fd1d40,ffff800039fd1c90) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800039fd1d40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fd1d40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e5f0e781270, count: -11