login: kernel: integer divide fault trap, code=0 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace rc4_keysetup(ffff8000261ac312,ffff8000261ac424,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000261ac2d8,ffffaebb,158e,ffff800000688e6c,ffffaebb) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002ff29c38,ffff800000688c00) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002ff29c38,ffff800000688c00) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000688c00,1,ffff8000ffff4a88) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000688c00,1,ffff8000ffff4a88) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80689bb2c0,82907003,ffff800000688c00,1,fffffd807f7d7618,ffff8000ffff4a88) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8073dc2010,82907003,ffff800000688c00,ffff8000ffff4a88) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000ffff4a88,ffff80002ff29f88,ffff80002ff29fd0) at sys_ioctl+0x4a2 syscall(ffff80002ff2a050) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002ff2a050) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x15f78a71330, count: -9 ddb{0}> show registers rdi 0xffff8000261ac312 rsi 0 rbp 0xffff80002ff29ac0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x2f166a8646c99939 r11 0xe355612af6b00b3b r12 0xffff8000261ac424 r13 0 r14 0xffff8000261ac312 r15 0 rip 0xffffffff81cdbf3f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002ff29a60 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor.5) pid=504209 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff4fc8,0xffff8000212f1520 process=0xffff800021309d38 user=0xffff80002ff25000, vmspace=0xfffffd806a9128b0 estcpu=33, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29443 310878 23708 0 2 0 syz-executor.3 27397 279932 28337 0 2 0 syz-executor.0 27397 16784 28337 0 3 0x4000080 fsleep syz-executor.0 27397 48118 28337 0 3 0x4000080 fsleep syz-executor.0 27397 249169 28337 0 2 0x4000000 syz-executor.0 51904 381692 7643 0 2 0 syz-executor.2 51904 421110 7643 0 3 0x4000080 fsleep syz-executor.2 51904 79982 7643 0 3 0x4000080 fsleep syz-executor.2 31176 285984 87883 0 2 0 syz-executor.1 31176 129950 87883 0 3 0x4000080 bell syz-executor.1 31176 111476 87883 0 3 0x4000080 fsleep syz-executor.1 23923 204413 17383 0 2 0 syz-executor.4 23923 229751 17383 0 3 0x4000080 fsleep syz-executor.4 23923 82546 17383 0 3 0x4000080 fsleep syz-executor.4 23923 252400 17383 0 3 0x4000080 fsleep syz-executor.4 53949 152889 9684 0 7 0 syz-executor.5 *53949 504209 9684 0 7 0x4000000 syz-executor.5 53949 203396 9684 0 2 0x4000000 syz-executor.5 53949 22845 9684 0 2 0x4000000 syz-executor.5 53949 179363 9684 0 2 0x4000000 syz-executor.5 23708 107231 47169 0 3 0x82 nanoslp syz-executor.3 40168 512589 1 0 3 0x100083 ttyin getty 28337 206024 47169 0 3 0x82 nanoslp syz-executor.0 85248 363344 47169 0 3 0x82 nanoslp syz-executor.7 9684 478040 47169 0 3 0x82 nanoslp syz-executor.5 17383 212902 47169 0 3 0x82 nanoslp syz-executor.4 7643 351954 47169 0 2 0x2 syz-executor.2 87883 346021 47169 0 3 0x82 nanoslp syz-executor.1 93941 428920 47169 0 2 0x2 syz-executor.6 16728 340450 0 0 3 0x14280 nfsidl nfsio 97346 21780 0 0 3 0x14280 nfsidl nfsio 42966 67480 0 0 3 0x14280 nfsidl nfsio 36667 294864 0 0 3 0x14280 nfsidl nfsio 56833 258055 0 0 3 0x14280 nfsidl nfsio 27794 183094 0 0 3 0x14280 nfsidl nfsio 959 236223 0 0 3 0x14280 nfsidl nfsio 24812 353288 0 0 3 0x14280 nfsidl nfsio 75827 1986 0 0 3 0x14280 nfsidl nfsio 99458 440336 0 0 3 0x14280 nfsidl nfsio 51551 143836 0 0 3 0x14280 nfsidl nfsio 86633 474344 0 0 3 0x14280 nfsidl nfsio 37888 523843 0 0 3 0x14280 nfsidl nfsio 71895 280691 0 0 3 0x14280 nfsidl nfsio 21051 87959 0 0 3 0x14280 nfsidl nfsio 7722 511563 0 0 3 0x14280 nfsidl nfsio 54809 426463 0 0 3 0x14280 nfsidl nfsio 75212 505180 0 0 3 0x14280 nfsidl nfsio 83359 492208 0 0 3 0x14280 nfsidl nfsio 12239 489259 0 0 3 0x14280 nfsidl nfsio 25207 78351 0 0 3 0x14200 bored sosplice 22445 289299 30348 0 3 0x100082 netio arp 30348 176924 1 0 3 0x10008a sigsusp sh 47169 358138 46197 0 3 0x82 wait syz-fuzzer 47169 125062 46197 0 3 0x4000082 nanoslp syz-fuzzer 47169 204390 46197 0 3 0x4000082 wait syz-fuzzer 47169 169733 46197 0 3 0x4000082 wait syz-fuzzer 47169 148019 46197 0 3 0x4000082 wait syz-fuzzer 47169 137180 46197 0 3 0x4000082 thrsleep syz-fuzzer 47169 127463 46197 0 3 0x4000082 wait syz-fuzzer 47169 343624 46197 0 3 0x4000082 thrsleep syz-fuzzer 47169 6391 46197 0 3 0x4000082 thrsleep syz-fuzzer 47169 325238 46197 0 3 0x4000082 kqread syz-fuzzer 47169 446835 46197 0 3 0x4000082 wait syz-fuzzer 47169 316389 46197 0 3 0x4000082 wait syz-fuzzer 47169 149839 46197 0 3 0x4000082 thrsleep syz-fuzzer 47169 318435 46197 0 3 0x4000082 wait syz-fuzzer 47169 203657 46197 0 3 0x4000082 nanoslp syz-fuzzer 47169 242122 46197 0 3 0x4000082 thrsleep syz-fuzzer 46197 270337 41007 0 3 0x10008a sigsusp ksh 41007 141258 63142 0 3 0x9a kqread sshd 63142 204101 1 0 3 0x88 kqread sshd 31668 455530 9933 74 3 0x1100092 bpf pflogd 9933 138170 1 0 3 0x80 netio pflogd 94476 411940 35808 73 3 0x1100090 kqread syslogd 35808 360169 1 0 3 0x100082 netio syslogd 84757 135419 1 0 3 0x100080 kqread resolvd 90041 420925 69040 77 3 0x100092 kqread dhcpleased 86801 125706 69040 77 3 0x100092 kqread dhcpleased 69040 357985 1 0 3 0x80 kqread dhcpleased 52036 485245 0 0 3 0x14200 bored smr 27903 241828 0 0 2 0x14200 zerothread 5002 469436 0 0 3 0x14200 aiodoned aiodoned 2407 291127 0 0 3 0x14200 syncer update 16568 60499 0 0 3 0x14200 cleaner cleaner 4206 14342 0 0 3 0x14200 reaper reaper 3276 170429 0 0 3 0x14200 pgdaemon pagedaemon 71107 235305 0 0 3 0x14200 bored viomb 86066 339641 0 0 3 0x40014200 acpi0 acpi0 81152 140889 0 0 3 0x40014200 idle1 85781 232070 0 0 3 0x14200 bored softnet 93996 251640 0 0 3 0x14200 bored softnet 48166 215028 0 0 3 0x14200 bored softnet 87354 203089 0 0 3 0x14200 bored softnet 45106 100697 0 0 3 0x14200 bored systqmp 55137 109017 0 0 3 0x14200 bored systq 76143 268429 0 0 3 0x40014200 bored softclock 51323 24253 0 0 3 0x40014200 idle0 1 423050 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 53949 (syz-executor.5) thread 0xffff8000ffff4a88 (504209) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ba46e8) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:508 #2 sys_ioctl+0x4a2 #3 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #3 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 93941 (syz-executor.6) thread 0xffff8000212f0d30 (428920) exclusive rrwlock inode r = 0 (0xfffffd8067874d60) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1324 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 #11 namei+0x36a sys/kern/vfs_lookup.c:244 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #13 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #13 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068e9da28) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1848 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10237 6641K 7160K 78643K 18222 0 pcb 13 14K 16K 78643K 495 0 rtable 235 16K 16K 78643K 1260 0 ifaddr 106 21K 21K 78643K 457 0 sysctl 2 0K 0K 78643K 2 0 counters 60 36K 36K 78643K 200 0 ioctlops 1 1K 4K 78643K 2011 0 iov 0 0K 16K 78643K 388 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1346 84K 84K 78643K 3427 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 37 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 97 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 18 65K 89K 78643K 4001 0 sigio 0 0K 0K 78643K 3 0 proc 71 91K 116K 78643K 1275 0 subproc 117 7K 7K 78643K 364 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 473 0 in_multi 106 7K 7K 78643K 391 0 ether_multi 1 0K 0K 78643K 18 0 mrt 0 0K 0K 78643K 30 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 163 731K 731K 78643K 163 0 exec 0 0K 2K 78643K 1419 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 62K 78643K 8 0 UVM amap 337 285K 858K 78643K 25675 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 110 0 NDP 16 0K 1K 78643K 139 0 temp 142 4722K 5744K 78643K 36995 0 kqueue 13 20K 26K 78643K 321 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 120 176 0 172 1 0 1 1 0 8 0 rtentry 112 376 0 272 4 1 3 4 0 8 0 unpcb 144 2058 0 2010 22 20 2 6 0 8 0 syncache 296 35 0 35 7 6 1 1 0 8 1 tcpqe 32 141 0 141 3 3 0 1 0 8 0 tcpcb 768 1328 0 1321 48 39 9 15 0 8 8 arp 120 58 0 40 1 0 1 1 0 8 0 inpcb 368 3581 0 3571 66 57 9 16 0 8 8 nd6 48 90 0 66 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 28 0 19 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 27 0 25 5 4 1 1 0 8 0 pffrag 232 18 0 16 3 2 1 1 0 482 0 pffrnode 88 18 0 16 3 2 1 1 0 8 0 pffrent 40 110 0 108 3 2 1 1 0 8 0 pfosfp 40 1432 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1432 0 717 21 0 21 21 0 8 0 pfstitem 24 172 0 138 1 0 1 1 0 8 0 pfstkey 120 172 0 138 2 0 2 2 0 8 0 pfstate 336 172 0 138 7 3 4 4 0 8 0 pfrule 1360 27 0 20 2 1 1 2 0 8 0 rttmr 136 9 0 9 3 3 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1845 0 1375 39 9 30 30 0 8 0 art_table 32 1846 0 1375 5 1 4 4 0 8 0 art_node 16 375 0 284 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 5 1 1 0 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 93 0 83 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6615 0 5169 91 0 91 91 0 8 0 ffsino 272 6615 0 5169 97 0 97 97 0 8 0 nchpl 144 12032 0 10380 63 0 63 63 0 8 0 rtmask 32 3 0 3 1 0 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 46916 0 46916 4 3 1 2 0 8 1 percpumem 16 112 0 70 1 0 1 1 0 8 0 vcpupl 2048 16 0 0 2 0 2 2 0 8 0 vmpool 568 31 0 15 3 1 2 2 0 8 0 kstatmem 264 166 0 134 3 0 3 3 0 8 0 scsiplug 72 7 0 7 2 2 0 1 0 8 0 scxspl 216 38474 0 38474 24 21 3 8 0 8 3 plimitpl 152 438 0 422 1 0 1 1 0 8 0 sigapl 424 4289 0 4219 11 2 9 9 0 8 0 futexpl 64 31776 0 31768 3 2 1 1 0 8 0 knotepl 120 474 0 0 11 0 11 11 0 8 0 kqueuepl 216 1157 0 1147 16 15 1 5 0 8 0 pipepl 320 860 0 829 28 25 3 9 0 8 0 fdescpl 496 4248 0 4217 5 0 5 5 0 8 0 filepl 152 29047 0 28715 53 35 18 19 0 8 5 lockfpl 104 625 0 623 1 0 1 1 0 8 0 lockfspl 48 245 0 243 1 0 1 1 0 8 0 sessionpl 144 45 0 27 1 0 1 1 0 8 0 pgrppl 48 49 0 31 1 0 1 1 0 8 0 ucredpl 104 4816 0 4804 1 0 1 1 0 8 0 zombiepl 144 4220 0 4219 2 1 1 1 0 8 0 processpl 1064 4289 0 4219 5 0 5 5 0 8 0 procpl 672 11718 0 11619 15 6 9 10 0 8 0 srpgc 96 22 0 22 5 4 1 1 0 8 1 sosppl 168 38 0 38 7 6 1 1 0 8 1 sockpl 488 5820 0 5758 131 119 12 28 0 8 4 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 20 0 0 3 1 2 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 434 0 0 53 10 43 53 0 8 0 mtagpl 96 176 0 0 3 0 3 3 0 8 0 mbufpl 256 656 0 0 30 0 30 30 0 8 0 bufpl 288 10970 0 4638 453 0 453 453 0 8 0 anonpl 24 845747 0 828842 166 46 120 146 0 186 0 amapchunkpl 152 112986 0 112158 368 209 159 345 0 158 123 amappl16 200 11945 0 11393 94 61 33 42 0 8 3 amappl15 192 856 0 847 1 0 1 1 0 8 0 amappl14 184 430 0 421 1 0 1 1 0 8 0 amappl13 176 396 0 392 1 0 1 1 0 8 0 amappl12 168 1073 0 1068 1 0 1 1 0 8 0 amappl11 160 983 0 961 2 0 2 2 0 8 0 amappl10 152 104 0 96 1 0 1 1 0 8 0 amappl9 144 676 0 673 1 0 1 1 0 8 0 amappl8 136 1642 0 1556 4 0 4 4 0 8 1 amappl7 128 835 0 811 1 0 1 1 0 8 0 amappl6 120 528 0 513 2 1 1 2 0 8 0 amappl5 112 2448 0 2428 1 0 1 1 0 8 0 amappl4 104 3149 0 3107 2 0 2 2 0 8 0 amappl3 96 13262 0 13197 2 0 2 2 0 8 0 amappl2 88 1327 0 1284 2 0 2 2 0 8 0 amappl1 80 107013 0 106260 22 5 17 20 0 8 0 amappl 88 24805 0 24595 6 1 5 5 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 4279 0 4232 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4279 0 4232 1 0 1 1 0 8 0 vmmpekpl 168 38410 0 38335 4 0 4 4 0 8 0 vmmpepl 168 424068 0 421265 222 83 139 143 0 357 4 vmsppl 368 4278 0 4232 5 0 5 5 0 8 0 rwobjpl 56 110703 0 102905 114 3 111 113 0 8 0 pdppl 4096 8565 0 8480 282 193 89 89 0 8 4 pvpl 32 1753718 0 1732398 388 195 193 266 0 265 1 pmappl 248 4278 0 4232 4 0 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1157 0 284 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff8000261ac312,ffff8000261ac424,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000261ac2d8,ffffaebb,158e,ffff800000688e6c,ffffaebb) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002ff29c38,ffff800000688c00) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002ff29c38,ffff800000688c00) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000688c00,1,ffff8000ffff4a88) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000688c00,1,ffff8000ffff4a88) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80689bb2c0,82907003,ffff800000688c00,1,fffffd807f7d7618,ffff8000ffff4a88) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8073dc2010,82907003,ffff800000688c00,ffff8000ffff4a88) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000ffff4a88,ffff80002ff29f88,ffff80002ff29fd0) at sys_ioctl+0x4a2 syscall(ffff80002ff2a050) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002ff2a050) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x15f78a71330, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82ba44e0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ba44e0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002ff12a00) at syscall+0x41d mi_syscall sys/sys/syscall_mi.h:100 [inline] syscall(ffff80002ff12a00) at syscall+0x41d sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb600, count: -6