V:J%R ?-4*@GLntzr70|`$ܕ~r|겿8-)voڱ,r˘vx +Fv7F'witness: lock_object uninitialized: 0xffff8000015b6030 Starting stack trace... witness_checkorder(ffff8000015b6030,9,0) at witness_checkorder+0x1af witness_debugger sys/kern/subr_witness.c:2522 [inline] witness_checkorder(ffff8000015b6030,9,0) at witness_checkorder+0x1af sys/kern/subr_witness.c:779 rw_do_enter_write(ffff8000015b6018,0) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 unveil_delete_names(ffff8000015b6000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002a444248) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff8548,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff8548,ffff80003c5003a0,ffff80003c5002f0) at sys_exit+0x1a syscall(ffff80003c5003a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5003a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71cc3b2dc750, count: 249 End of stack trace. Stopped at db_enter+0x25: addq $0x8,%rsp ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000015b6030,9,0) at witness_checkorder+0x1b4 rw_do_enter_write(ffff8000015b6018,0) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 unveil_delete_names(ffff8000015b6000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002a444248) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff8548,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff8548,ffff80003c5003a0,ffff80003c5002f0) at sys_exit+0x1a syscall(ffff80003c5003a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5003a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71cc3b2dc750, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c500030 rbx 0 rdx 0 rcx 0xffff8000ffff8548 rax 0xffffffff83851ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80003c4fffd0 r9 0x8080808080808080 r10 0x882d25b8759074b r11 0xf3e28b100d2262c2 r12 0 r13 0x1 r14 0xffff8000015b6030 r15 0x3 rip 0xffffffff81441685 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c500020 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=402700 pid=89870 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=84, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000ffff8548 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a3719c0,0xffff8000ffff82c8 process=0xffff80002a444248 user=0xffff80003c4fb000, vmspace=0xfffffd807eb8c390 estcpu=36, cpticks=13, pctcpu=0.5, user=0, sys=8, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61600 85792 68350 0 2 0 syz-executor 61600 490952 68350 0 3 0x4000080 fsleep syz-executor 68156 212287 2825 0 2 0 syz-executor 68156 345738 2825 0 3 0x4000080 kqsel syz-executor 68156 372772 2825 0 3 0x4000080 fsleep syz-executor 64711 239769 60003 0 2 0 syz-executor 64711 372232 60003 0 3 0x4000080 fsleep syz-executor 78067 251318 53144 0 2 0 syz-executor 78067 355506 53144 0 3 0x4000080 kqsel syz-executor 78067 183893 53144 0 3 0x4000080 kqread syz-executor 78067 455259 53144 0 3 0x4000080 fsleep syz-executor 58747 146364 50 0 3 0x82 wait syz-executor 83232 343244 0 0 3 0x14200 acct acct 99483 196584 1 0 2 0x100083 getty 2825 66564 50 0 2 0x482 syz-executor 30354 437760 50 0 2 0x482 syz-executor 68350 150460 50 0 2 0x482 syz-executor 60003 418286 50 0 2 0x482 syz-executor 53144 394131 50 0 2 0x482 syz-executor 318 49599 50 0 2 0x2 syz-executor 93740 152119 0 0 3 0x14200 bored sosplice 10693 246162 50 0 2 0x2 syz-executor 50 285475 68444 0 3 0x82 kqread syz-executor 68444 3130 56342 0 3 0x10008a sigsusp ksh 56342 41857 53134 0 3 0x98 kqread sshd-session 53134 438100 71093 0 3 0x92 kqread sshd-session 71093 310924 1 0 3 0x88 kqread sshd 9282 337108 92966 74 3 0x1100092 bpf pflogd 92966 367956 1 0 3 0x80 sbwait pflogd 69015 153335 73976 73 2 0x1100090 syslogd 73976 210263 1 0 3 0x100082 sbwait syslogd 4769 27846 1 0 3 0x100080 kqread resolvd 51834 402147 89150 77 3 0x100092 kqread dhcpleased 37119 139878 89150 77 3 0x100092 kqread dhcpleased 89150 364089 1 0 3 0x80 kqread dhcpleased 660 142154 0 0 3 0x14200 bored smr 79190 265358 0 0 2 0x14200 zerothread 73812 437707 0 0 3 0x14200 aiodoned aiodoned 62565 411786 0 0 3 0x14200 syncer update 2063 98257 0 0 3 0x14200 cleaner cleaner 67384 317196 0 0 3 0x14200 reaper reaper 91751 320386 0 0 3 0x14200 pgdaemon pagedaemon 52317 303609 0 0 3 0x14200 bored viomb 43467 201187 0 0 3 0x40014200 acpi0 acpi0 23057 40518 0 0 7 0x40014200 idle1 23869 434020 0 0 3 0x14200 bored softnet3 59238 136295 0 0 3 0x14200 bored softnet2 69795 256896 0 0 3 0x14200 bored softnet1 18019 446915 0 0 2 0x14200 softnet0 89145 235354 0 0 3 0x14200 bored systqmp 69399 509720 0 0 3 0x14200 bored systq 99169 466147 0 0 2 0x14200 softclockmp 72335 110574 0 0 2 0x40014200 softclock 19539 215250 0 0 3 0x40014200 idle0 1 336365 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 318 (syz-executor) thread 0xffff80002a373728 (49599) exclusive rrwlock inode r = 0 (0xfffffd80789e8528) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3102 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80788e0cc0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3087 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 10693 (syz-executor) thread 0xffff80002a3727c8 (246162) exclusive rrwlock inode r = 0 (0xfffffd80787aeaa0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1851 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e6061c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1851 #12 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 11179K 11501K 166960K 16069 0 pcb 17 15K 16K 166960K 672 0 rtable 188 9K 11K 166960K 1036 0 pf 40 19K 25K 166960K 313 0 ifaddr 34 6K 8K 166960K 189 0 ifgroup 54 2K 3K 166960K 294 0 sysctl 4 1K 3K 166960K 13 0 counters 62 36K 37K 166960K 246 0 ioctlops 0 0K 4K 166960K 1955 0 iov 0 0K 28K 166960K 365 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1448 91K 92K 166960K 4445 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 28K 36K 166960K 79 0 VM map 2 1K 1K 166960K 2 0 sem 28 28K 29K 166960K 159 0 dirhash 15 2K 2K 166960K 75 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 93K 166960K 3511 0 sigio 1 0K 0K 166960K 137 0 proc 75 115K 116K 166960K 1226 0 subproc 72 4K 4K 166960K 172 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 936 0 in_multi 69 4K 7K 166960K 382 0 ether_multi 1 0K 0K 166960K 25 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 1246 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 4K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 73K 91K 166960K 33887 0 UVM aobj 181 6K 8K 166960K 196 0 pinsyscall 41 82K 104K 166960K 4920 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 1K 166960K 184 0 NDP 11 0K 2K 166960K 136 0 temp 80 8644K 8900K 166960K 128509 0 kqueue 13 20K 31K 166960K 599 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 389 0 386 3 2 1 2 0 8 0 rtentry 112 306 0 230 4 1 3 4 0 8 0 unpcb 144 4054 0 4036 32 26 6 6 0 8 5 syncache 336 9 0 9 5 5 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 1511 0 1503 33 31 2 8 0 8 0 arp 120 52 0 38 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 376 4909 0 4897 35 27 8 9 0 8 5 nd6 136 68 0 48 1 0 1 1 0 8 0 pkpcb 40 52 0 52 6 6 0 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1168 59 0 59 6 5 1 1 0 8 1 pppxif 1472 7 0 7 3 3 0 1 0 8 0 pffrag 232 18 0 14 1 0 1 1 0 482 0 pffrnode 88 18 0 14 1 0 1 1 0 8 0 pffrent 40 59 0 55 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 10 0 7 2 1 1 1 0 8 0 pfqueue 320 35 0 34 1 0 1 1 0 8 0 pfstitem 24 257 0 131 1 0 1 1 0 8 0 pfstkey 128 257 0 131 5 0 5 5 0 8 0 pfstate 376 257 0 131 14 0 14 14 0 8 0 pfrule 1344 49 0 32 3 1 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1232 0 902 36 12 24 30 0 8 0 art_table 32 1235 0 902 4 0 4 4 0 8 0 art_node 16 296 0 229 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 19 2 1 1 1 0 8 0 semapl 112 152 0 126 1 0 1 1 0 8 0 shmpl 112 193 0 15 6 0 6 6 0 8 0 dirhash 1024 59 0 40 3 0 3 3 0 8 0 dino2pl 256 7959 0 6433 96 0 96 96 0 8 0 ffsino 280 7959 0 6433 110 0 110 110 0 8 0 nchpl 144 12984 0 12400 64 40 24 64 0 8 0 rtmask 32 5 0 5 2 2 0 1 0 8 0 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 48860 0 48859 4 3 1 2 0 8 0 percpumem 16 137 0 92 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 178 0 156 4 2 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 12 0 12 6 5 1 1 0 8 1 scxspl 216 41387 0 41387 17 16 1 8 1 8 1 plimitpl 152 830 0 811 1 0 1 1 0 8 0 sigapl 424 3822 0 3772 10 3 7 9 0 8 0 futexpl 64 53847 0 53843 1 0 1 1 0 8 0 knotepl 120 608 0 0 17 0 17 17 0 8 0 kqueuepl 216 1387 0 1375 15 14 1 5 0 8 0 pipepl 328 607 0 580 8 5 3 8 0 8 0 fdescpl 504 3779 0 3750 5 0 5 5 0 8 0 filepl 152 29829 0 29605 39 25 14 18 0 8 1 lockfpl 104 1371 0 1369 3 2 1 2 0 8 0 lockfspl 48 452 0 450 1 0 1 1 0 8 0 sessionpl 144 42 0 33 1 0 1 1 0 8 0 pgrppl 48 109 0 92 1 0 1 1 0 8 0 ucredpl 104 5080 0 5067 1 0 1 1 0 8 0 zombiepl 144 4247 0 4245 2 1 1 1 0 8 0 processpl 1168 3822 0 3772 7 2 5 6 0 8 0 procpl 656 9031 0 8974 9 2 7 8 0 8 0 srpgc 96 27 0 27 7 6 1 1 0 8 1 sosppl 168 36 0 36 9 8 1 1 0 8 1 sockpl 688 9471 0 9440 77 61 16 16 0 8 11 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 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 44 0 0 5 0 5 5 0 8 0 mtagpl 96 161 0 0 4 0 4 4 0 8 0 mbufpl 256 851 0 0 52 0 52 52 0 8 0 bufpl 280 13412 0 7258 440 0 440 440 0 8 0 anonpl 24 442281 0 435452 137 70 67 88 0 184 0 amapchunkpl 152 109908 0 109356 60 31 29 30 0 158 3 amappl16 200 9224 0 9059 86 67 19 30 0 8 4 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 187 0 175 1 0 1 1 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 4611 0 4581 2 0 2 2 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 261 0 260 1 0 1 1 0 8 0 amappl8 136 58 0 55 1 0 1 1 0 8 0 amappl7 128 163 0 149 1 0 1 1 0 8 0 amappl6 120 309 0 306 1 0 1 1 0 8 0 amappl5 112 174 0 163 1 0 1 1 0 8 0 amappl4 104 388 0 369 1 0 1 1 0 8 0 amappl3 96 23467 0 23357 4 0 4 4 0 8 0 amappl2 88 880 0 815 2 0 2 2 0 8 0 amappl1 80 20099 0 19523 15 1 14 14 0 8 0 amappl 88 33150 0 32978 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma8192 8192 2 0 2 2 2 0 1 0 8 0 dma4096 4096 3 0 3 3 2 1 1 0 8 1 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma512 512 2 0 2 2 2 0 1 0 8 0 dma256 256 7 0 7 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 195 0 15 4 0 4 4 0 8 0 uaddrrnd 24 3779 0 3749 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3779 0 3749 1 0 1 1 0 8 0 vmmpekpl 168 28207 0 28147 4 0 4 4 0 8 0 vmmpepl 168 230002 0 228029 137 38 99 109 0 357 1 vmsppl 456 3778 0 3749 5 0 5 5 0 8 0 rwobjpl 64 62325 0 55136 130 10 120 123 0 8 0 pdppl 4096 7565 0 7498 125 52 73 85 0 8 6 pvpl 32 22087 0 0 177 0 177 177 0 265 0 pmappl 248 3778 0 3749 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 411 0 121 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff8000015b6030,9,0) at witness_checkorder+0x1b4 rw_do_enter_write(ffff8000015b6018,0) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233 unveil_delete_names(ffff8000015b6000) at unveil_delete_names+0x3d sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002a444248) at unveil_destroy+0xbd sys/kern/kern_unveil.c:183 exit1(ffff8000ffff8548,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000ffff8548,ffff80003c5003a0,ffff80003c5002f0) at sys_exit+0x1a syscall(ffff80003c5003a0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c5003a0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71cc3b2dc750, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp