panic: kernel diagnostic assertion "to->to_kclock == KCLOCK_UPTIME" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c", line 502 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 59775 74047 0 0x2000 0x4080000 0K syz-executor.6 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279ae1e) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82818433,ffffffff8285eb92,1f6,ffffffff827ed6bb) at __assert+0x29 sys/kern/subr_prf.c:157 timeout_bucket(fffffd8069454e78) at timeout_bucket+0x1f4 sys/kern/kern_timeout.c:505 softclock_process_kclock_timeout(fffffd8069454e78,0) at softclock_process_kclock_timeout+0xe9 sys/kern/kern_timeout.c:655 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:716 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 ttyinput(0,ffff800000ce0200) at ttyinput+0x896 sys/kern/tty.c:327 ptcwrite(601,ffff80002afb9c10,1) at ptcwrite+0x28a sys/kern/tty_pty.c:566 spec_write(ffff80002afb99f0) at spec_write+0xd9 sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd806e0fb210,ffff80002afb9c10,1,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd80663d0b68,ffff80002afb9c10,0) at vn_write+0x15b sys/kern/vfs_vnops.c:408 dofilewritev(ffff800021296030,5,ffff80002afb9c10,0,ffff80002afb9d00) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375 end trace frame: 0xffff80002afb9ca0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "to->to_kclock == KCLOCK_UPTIME" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c", line 502 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279ae1e) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82818433,ffffffff8285eb92,1f6,ffffffff827ed6bb) at __assert+0x29 sys/kern/subr_prf.c:157 timeout_bucket(fffffd8069454e78) at timeout_bucket+0x1f4 sys/kern/kern_timeout.c:505 softclock_process_kclock_timeout(fffffd8069454e78,0) at softclock_process_kclock_timeout+0xe9 sys/kern/kern_timeout.c:655 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:716 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 ttyinput(0,ffff800000ce0200) at ttyinput+0x896 sys/kern/tty.c:327 ptcwrite(601,ffff80002afb9c10,1) at ptcwrite+0x28a sys/kern/tty_pty.c:566 spec_write(ffff80002afb99f0) at spec_write+0xd9 sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd806e0fb210,ffff80002afb9c10,1,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd80663d0b68,ffff80002afb9c10,0) at vn_write+0x15b sys/kern/vfs_vnops.c:408 dofilewritev(ffff800021296030,5,ffff80002afb9c10,0,ffff80002afb9d00) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375 sys_writev(ffff800021296030,ffff80002afb9cb0,ffff80002afb9d00) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002afb9d80) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afb9d80) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x31336e9f300, count: -17 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002afb94a0 rbx 0xffffffff82c1ab8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0xffff800021296030 rax 0xffffffff82c19ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xa228b39f9207cdf2 r11 0xccec418323658889 r12 0xffffffff82c1a990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff812779ec db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002afb9490 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.6) pid=59775 stat=onproc flags process=2000 proc=4080000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021297080,0xffffffff82c553f0 process=0xffff8000212a6e28 user=0xffff80002afb4000, vmspace=0xfffffd8069a7f758 estcpu=36, cpticks=90, pctcpu=9.66 user=0, sys=19, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74047 514999 13716 0 4 0x82000 syz-executor.6 74047 63692 13716 0 3 0x4002000 suspend syz-executor.6 *74047 59775 13716 0 7 0x4082000 syz-executor.6 18782 338436 0 0 3 0x14200 acct acct 96185 380629 91460 0 3 0x82 piperd syz-executor.1 93926 282203 91460 0 3 0x82 piperd syz-executor.2 44159 26010 91460 0 3 0x82 piperd syz-executor.5 10158 381831 1 0 3 0x100083 ttyin getty 59233 199867 91460 0 3 0x82 piperd syz-executor.0 92941 518440 91460 0 3 0x82 piperd syz-executor.3 13716 130415 91460 0 3 0x82 wait syz-executor.6 63983 219009 91460 0 3 0x82 piperd syz-executor.7 88753 153700 91460 0 3 0x82 piperd syz-executor.4 78901 196860 0 0 3 0x14200 bored sosplice 91460 124899 90920 0 3 0x82 wait syz-fuzzer 91460 243895 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 187294 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 491401 90920 0 3 0x4000082 wait syz-fuzzer 91460 232984 90920 0 3 0x4000082 wait syz-fuzzer 91460 517113 90920 0 3 0x4000082 wait syz-fuzzer 91460 161441 90920 0 3 0x4000082 wait syz-fuzzer 91460 188444 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 385006 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 498091 90920 0 3 0x4000082 wait syz-fuzzer 91460 87556 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 152806 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 245837 90920 0 3 0x4000082 thrsleep syz-fuzzer 91460 169793 90920 0 3 0x4000082 kqread syz-fuzzer 91460 462784 90920 0 3 0x4000082 wait syz-fuzzer 91460 482551 90920 0 3 0x4000082 wait syz-fuzzer 90920 13815 17926 0 3 0x10008a sigsusp ksh 17926 278007 69639 0 3 0x9a kqread sshd 69639 336635 1 0 3 0x88 kqread sshd 55535 362240 81990 74 3 0x1100092 bpf pflogd 81990 157336 1 0 3 0x80 netio pflogd 46005 213673 52181 73 3 0x1100090 kqread syslogd 52181 21146 1 0 3 0x100082 netio syslogd 62066 259015 1 0 3 0x100080 kqread resolvd 76899 286895 21544 77 3 0x100092 kqread dhcpleased 52096 27759 21544 77 3 0x100092 kqread dhcpleased 21544 500115 1 0 3 0x80 kqread dhcpleased 2778 268478 0 0 3 0x14200 bored smr 16304 486951 0 0 3 0x14200 pgzero zerothread 23055 398191 0 0 3 0x14200 aiodoned aiodoned 94037 9257 0 0 3 0x14200 syncer update 4793 179858 0 0 3 0x14200 cleaner cleaner 69085 193239 0 0 3 0x14200 reaper reaper 11857 460903 0 0 3 0x14200 pgdaemon pagedaemon 30851 168525 0 0 3 0x14200 bored viomb 31606 442779 0 0 3 0x40014200 acpi0 acpi0 3721 244024 0 0 7 0x40014200 idle1 94418 257466 0 0 3 0x14200 bored softnet3 32120 480015 0 0 3 0x14200 bored softnet2 12162 127431 0 0 3 0x14200 bored softnet1 51464 481923 0 0 3 0x14200 bored softnet0 59426 419152 0 0 3 0x14200 bored systqmp 45462 63497 0 0 3 0x14200 bored systq 98729 77707 0 0 2 0x40014200 softclock 30971 30857 0 0 3 0x40014200 idle0 1 420277 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82bfe4f0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 softclock+0x31 sys/kern/kern_timeout.c:707 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x27 #6 ttyinput+0x896 sys/kern/tty.c:327 #7 ptcwrite+0x28a sys/kern/tty_pty.c:566 #8 spec_write+0xd9 sys/kern/spec_vnops.c:302 #9 VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 #10 vn_write+0x15b sys/kern/vfs_vnops.c:408 #11 dofilewritev+0x1a0 sys/kern/sys_generic.c:375 #12 sys_writev+0xab sys/kern/sys_generic.c:322 #13 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 Process 74047 (syz-executor.6) thread 0xffff800021296030 (59775) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82c53a70) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x440 sys/kern/sched_bsd.c:420 #3 preempt+0x5b sys/kern/sched_bsd.c:300 #4 uiomove+0x1b4 sys/kern/kern_subr.c:140 #5 ptcwrite+0x154 sys/kern/tty_pty.c:550 #6 spec_write+0xd9 sys/kern/spec_vnops.c:302 #7 VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 #8 vn_write+0x15b sys/kern/vfs_vnops.c:408 #9 dofilewritev+0x1a0 sys/kern/sys_generic.c:375 #10 sys_writev+0xab sys/kern/sys_generic.c:322 #11 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #12 Xsyscall+0x128 exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_timeout.c:57 r = 0 (0xffffffff82bfe4f0) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 softclock+0x31 sys/kern/kern_timeout.c:707 #4 softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 #5 Xsoftclock+0x27 #6 ttyinput+0x896 sys/kern/tty.c:327 #7 ptcwrite+0x28a sys/kern/tty_pty.c:566 #8 spec_write+0xd9 sys/kern/spec_vnops.c:302 #9 VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 #10 vn_write+0x15b sys/kern/vfs_vnops.c:408 #11 dofilewritev+0x1a0 sys/kern/sys_generic.c:375 #12 sys_writev+0xab sys/kern/sys_generic.c:322 #13 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10234 6495K 9129K 78643K 15008 0 pcb 13 16K 18K 78643K 544 0 rtable 244 7K 8K 78643K 1269 0 pf 32 9K 10K 78643K 235 0 ifaddr 45 16K 17K 78643K 203 0 ifgroup 55 2K 2K 78643K 371 0 sysctl 2 0K 2K 78643K 9 0 counters 60 35K 36K 78643K 222 0 ioctlops 0 0K 4K 78643K 1674 0 iov 0 0K 34K 78643K 1035 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1730 108K 109K 78643K 13283 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 102 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 868 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 93K 78643K 11222 0 sigio 0 0K 0K 78643K 337 0 proc 78 92K 128K 78643K 1809 0 subproc 104 6K 6K 78643K 406 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 439 0 in_multi 99 7K 7K 78643K 453 0 ether_multi 1 0K 0K 78643K 2 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 325 1447K 1447K 78643K 325 0 exec 0 0K 1K 78643K 1916 0 pfkey data 0 0K 0K 78643K 2 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 396 91K 107K 78643K 112072 0 UVM aobj 131 7K 7K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 168 0 NDP 12 0K 1K 78643K 155 0 temp 74 5872K 6000K 78643K 83552 0 kqueue 12 18K 26K 78643K 592 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 382 0 379 6 5 1 3 0 8 0 rtentry 112 416 0 304 4 0 4 4 0 8 0 unpcb 144 8544 0 8529 114 113 1 6 0 8 0 syncache 296 40 0 40 13 13 0 1 0 8 0 tcpqe 32 153 0 153 6 6 0 1 0 8 0 tcpcb 808 1920 0 1916 69 68 1 11 0 8 0 arp 120 64 0 46 1 0 1 1 0 8 0 inpcb 368 4983 0 4976 123 122 1 13 0 8 0 nd6 136 105 0 79 2 0 2 2 0 8 0 pkpcb 40 76 0 76 4 4 0 1 0 8 0 kcovpl 48 31 0 23 1 0 1 1 0 8 0 ppxss 1256 19 0 19 8 8 0 1 0 8 0 pffrag 232 105 0 104 2 1 1 1 0 482 0 pffrnode 88 105 0 104 2 1 1 1 0 8 0 pffrent 40 391 0 390 2 1 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 pfstitem 24 303 0 298 1 0 1 1 0 8 0 pfstkey 128 303 0 298 2 0 2 2 0 8 0 pfstate 376 303 0 298 9 8 1 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1544 0 1075 32 2 30 31 0 8 0 art_table 32 1545 0 1075 4 0 4 4 0 8 0 art_node 16 376 0 274 1 0 1 1 0 8 0 sysvmsgpl 40 79 0 43 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 857 0 847 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15611 0 14087 96 0 96 96 0 8 0 ffsino 272 15611 0 14087 102 0 102 102 0 8 0 nchpl 144 31647 0 31066 64 40 24 64 0 8 0 uvmvnodes 80 6738 0 0 138 0 138 138 0 8 0 vnodes 216 6738 0 0 375 0 375 375 0 8 0 namei 1024 109861 0 109861 30 29 1 2 0 8 1 percpumem 16 124 0 81 1 0 1 1 0 8 0 kstatmem 264 186 0 162 2 0 2 2 0 8 0 scxspl 216 98273 0 98273 65 64 1 8 0 8 1 plimitpl 152 1732 0 1715 1 0 1 1 0 8 0 sigapl 424 11686 0 11643 10 2 8 9 0 8 0 futexpl 64 79489 0 79489 7 6 1 1 0 8 1 knotepl 120 296 0 0 7 0 7 7 0 8 0 kqueuepl 216 1602 0 1594 30 29 1 6 0 8 0 pipepl 320 2234 0 2206 71 68 3 8 0 8 0 fdescpl 496 11475 0 11451 5 0 5 5 0 8 0 filepl 152 69769 0 69528 173 163 10 20 0 8 0 lockfpl 104 1609 0 1607 3 2 1 2 0 8 0 lockfspl 48 689 0 687 1 0 1 1 0 8 0 sessionpl 144 52 0 35 1 0 1 1 0 8 0 pgrppl 48 290 0 273 1 0 1 1 0 8 0 ucredpl 104 9154 0 9138 1 0 1 1 0 8 0 zombiepl 144 11643 0 11643 4 3 1 1 0 8 1 processpl 1072 11686 0 11643 6 1 5 6 0 8 0 procpl 696 31423 0 31363 23 15 8 11 0 8 0 sosppl 168 80 0 80 14 14 0 1 0 8 0 sockpl 488 14001 0 13974 413 409 4 29 0 8 0 mcl64k 65536 27 0 0 3 0 3 3 0 8 0 mcl16k 16384 33 0 0 5 2 3 3 0 8 0 mcl12k 12288 26 0 0 2 0 2 2 0 8 0 mcl9k 9216 27 0 0 2 1 1 2 0 8 0 mcl8k 8192 27 0 0 4 1 3 3 0 8 0 mcl4k 4096 97 0 0 10 7 3 9 0 8 0 mcl2k2 2112 11 0 0 1 0 1 1 0 8 0 mcl2k 2048 366 0 0 33 7 26 33 0 8 0 mtagpl 96 210 0 0 6 2 4 6 0 8 0 mbufpl 256 1828 0 0 82 0 82 82 0 8 0 bufpl 288 25307 0 18568 482 0 482 482 0 8 0 anonpl 24 1175613 0 1161397 225 127 98 124 0 186 0 amapchunkpl 152 353352 0 352587 89 51 38 48 0 158 0 amappl16 200 23138 0 22667 155 130 25 39 0 8 0 amappl15 192 16 0 15 1 0 1 1 0 8 0 amappl14 184 242 0 226 2 1 1 2 0 8 0 amappl13 176 15 0 15 4 4 0 1 0 8 0 amappl12 168 12500 0 12470 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 57 0 44 1 0 1 1 0 8 0 amappl9 144 268 0 266 2 1 1 2 0 8 0 amappl8 136 708 0 554 6 0 6 6 0 8 0 amappl7 128 151 0 130 1 0 1 1 0 8 0 amappl6 120 499 0 477 2 1 1 2 0 8 0 amappl5 112 464 0 454 1 0 1 1 0 8 0 amappl4 104 1124 0 1074 3 1 2 3 0 8 0 amappl3 96 69453 0 69386 4 1 3 3 0 8 0 amappl2 88 12018 0 11952 3 1 2 3 0 8 0 amappl1 80 50135 0 49590 23 9 14 23 0 8 0 amappl 88 111033 0 110825 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 11475 0 11451 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11475 0 11451 1 0 1 1 0 8 0 vmmpekpl 168 91602 0 91541 3 0 3 3 0 8 0 vmmpepl 168 692362 0 690084 345 227 118 134 0 357 0 vmsppl 464 11474 0 11451 5 0 5 5 0 8 0 rwobjpl 56 173663 0 165158 142 22 120 122 0 8 0 pdppl 4096 22958 0 22902 797 738 59 84 0 8 3 pvpl 32 3279867 0 3260016 573 400 173 370 0 265 0 pmappl 248 11474 0 11451 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1883 0 986 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8279ae1e) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82818433,ffffffff8285eb92,1f6,ffffffff827ed6bb) at __assert+0x29 sys/kern/subr_prf.c:157 timeout_bucket(fffffd8069454e78) at timeout_bucket+0x1f4 sys/kern/kern_timeout.c:505 softclock_process_kclock_timeout(fffffd8069454e78,0) at softclock_process_kclock_timeout+0xe9 sys/kern/kern_timeout.c:655 softclock(0) at softclock+0x11a sys/kern/kern_timeout.c:716 softintr_dispatch(0) at softintr_dispatch+0xfb sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 ttyinput(0,ffff800000ce0200) at ttyinput+0x896 sys/kern/tty.c:327 ptcwrite(601,ffff80002afb9c10,1) at ptcwrite+0x28a sys/kern/tty_pty.c:566 spec_write(ffff80002afb99f0) at spec_write+0xd9 sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd806e0fb210,ffff80002afb9c10,1,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd80663d0b68,ffff80002afb9c10,0) at vn_write+0x15b sys/kern/vfs_vnops.c:408 dofilewritev(ffff800021296030,5,ffff80002afb9c10,0,ffff80002afb9d00) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375 sys_writev(ffff800021296030,ffff80002afb9cb0,ffff80002afb9d00) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002afb9d80) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002afb9d80) at syscall+0x606 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x31336e9f300, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d58ff0) at sched_idle+0x41e sys/kern/kern_sched.c:184 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d58ff0) at sched_idle+0x41e sys/kern/kern_sched.c:184 end trace frame: 0x0, count: -5