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(ffff80002883a7e2,ffff80002883a8f4,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002883a7a8,fffffffe,42,ffff8000006d1e6c,fffffffe) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e4ef028,ffff8000006d1c00) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e4ef028,ffff8000006d1c00) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff8000006d1c00,1,ffff8000212efcf0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff8000006d1c00,1,ffff8000212efcf0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80779641d8,82907003,ffff8000006d1c00,1,fffffd807f7d73a8,ffff8000212efcf0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80661dfda8,82907003,ffff8000006d1c00,ffff8000212efcf0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000212efcf0,ffff80002e4ef378,ffff80002e4ef3c0) at sys_ioctl+0x4a2 syscall(ffff80002e4ef440) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4ef440) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3a8e0eba710, count: -9 ddb{0}> show registers rdi 0xffff80002883a7e2 rsi 0 rbp 0xffff80002e4eeeb0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x64f80f30de21b669 r11 0x61dab15fa312d768 r12 0xffff80002883a8f4 r13 0 r14 0xffff80002883a7e2 r15 0 rip 0xffffffff818fba1f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e4eee50 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor.2) pid=496766 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002e486fd0,0xffff8000212ee020 process=0xffff8000ffff8c80 user=0xffff80002e4ea000, vmspace=0xfffffd8064d9f1a0 estcpu=33, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55099 150453 12835 0 2 0 syz-executor.4 51902 210939 41917 0 2 0 syz-executor.5 82243 334612 41077 0 2 0 syz-executor.6 82243 149810 41077 0 3 0x4000080 fsleep syz-executor.6 64020 198645 14622 0 2 0 syz-executor.2 *64020 496766 14622 0 7 0x4000000 syz-executor.2 64020 469798 14622 0 3 0x4000080 fsleep syz-executor.2 64020 406092 14622 0 3 0x4000080 fsleep syz-executor.2 22021 416876 39625 0 2 0 syz-executor.3 22021 154352 39625 0 3 0x4000080 ttyout syz-executor.3 86140 392134 69035 0 2 0 syz-executor.0 86140 216341 69035 0 2 0x4000000 syz-executor.0 69833 406594 0 0 3 0x14200 acct acct 41917 54623 95472 0 3 0x82 nanoslp syz-executor.5 29694 422805 95472 0 2 0x2 syz-executor.1 25726 171714 95472 0 2 0x2 syz-executor.7 31817 424201 0 0 3 0x14280 nfsidl nfsio 47182 336480 0 0 3 0x14280 nfsidl nfsio 98132 151876 0 0 3 0x14280 nfsidl nfsio 76049 445920 0 0 3 0x14280 nfsidl nfsio 48433 375840 0 0 3 0x14280 nfsidl nfsio 65970 444811 0 0 3 0x14280 nfsidl nfsio 80848 330990 0 0 3 0x14280 nfsidl nfsio 8571 243444 0 0 3 0x14280 nfsidl nfsio 58958 141774 0 0 3 0x14280 nfsidl nfsio 90968 97203 0 0 3 0x14280 nfsidl nfsio 67934 124224 0 0 3 0x14280 nfsidl nfsio 87381 118699 0 0 3 0x14280 nfsidl nfsio 26874 40 0 0 3 0x14280 nfsidl nfsio 1305 160481 0 0 3 0x14280 nfsidl nfsio 60511 269973 0 0 3 0x14280 nfsidl nfsio 50642 483167 0 0 3 0x14280 nfsidl nfsio 98176 325642 0 0 3 0x14280 nfsidl nfsio 36176 101389 0 0 3 0x14280 nfsidl nfsio 21442 403922 0 0 3 0x14280 nfsidl nfsio 10932 508185 0 0 3 0x14280 nfsidl nfsio 14622 217394 95472 0 3 0x82 nanoslp syz-executor.2 69035 170084 95472 0 3 0x82 nanoslp syz-executor.0 12835 269512 95472 0 2 0x2 syz-executor.4 39625 348637 95472 0 3 0x82 nanoslp syz-executor.3 11900 96895 1 0 3 0x100083 ttyopn getty 41077 75505 95472 0 3 0x82 nanoslp syz-executor.6 90949 405850 0 0 3 0x14200 bored sosplice 95472 492692 31264 0 3 0x82 wait syz-fuzzer 95472 360443 31264 0 3 0x4000082 nanoslp syz-fuzzer 95472 217876 31264 0 3 0x4000082 thrsleep syz-fuzzer 95472 388232 31264 0 3 0x4000082 thrsleep syz-fuzzer 95472 228386 31264 0 3 0x4000082 wait syz-fuzzer 95472 248911 31264 0 3 0x4000082 thrsleep syz-fuzzer 95472 127860 31264 0 3 0x4000082 wait syz-fuzzer 95472 93967 31264 0 3 0x4000082 wait syz-fuzzer 95472 182805 31264 0 3 0x4000082 thrsleep syz-fuzzer 95472 501621 31264 0 3 0x4000082 wait syz-fuzzer 95472 341908 31264 0 3 0x4000082 kqread syz-fuzzer 95472 168982 31264 0 3 0x4000082 nanoslp syz-fuzzer 95472 275143 31264 0 3 0x4000082 thrsleep syz-fuzzer 95472 288895 31264 0 3 0x4000082 wait syz-fuzzer 95472 494821 31264 0 3 0x4000082 wait syz-fuzzer 95472 26455 31264 0 3 0x4000082 wait syz-fuzzer 95472 320944 31264 0 3 0x4000082 thrsleep syz-fuzzer 31264 28678 36564 0 3 0x10008a sigsusp ksh 36564 483127 55770 0 3 0x9a kqread sshd 55770 32512 1 0 3 0x88 kqread sshd 95198 276219 64577 74 3 0x1100092 bpf pflogd 64577 355555 1 0 3 0x80 netio pflogd 1269 29777 54106 73 3 0x1100090 kqread syslogd 54106 379076 1 0 3 0x100082 netio syslogd 67785 260762 1 0 3 0x100080 kqread resolvd 70945 384248 22432 77 3 0x100092 kqread dhcpleased 10298 234763 22432 77 3 0x100092 kqread dhcpleased 22432 201232 1 0 3 0x80 kqread dhcpleased 17687 229240 0 0 3 0x14200 bored smr 46032 200594 0 0 2 0x14200 zerothread 50328 72073 0 0 3 0x14200 aiodoned aiodoned 16383 409609 0 0 3 0x14200 syncer update 75447 287334 0 0 3 0x14200 cleaner cleaner 11148 74917 0 0 3 0x14200 reaper reaper 1168 89769 0 0 3 0x14200 pgdaemon pagedaemon 32189 17165 0 0 3 0x14200 bored viomb 45659 246496 0 0 3 0x40014200 acpi0 acpi0 91750 125502 0 0 7 0x40014200 idle1 44901 470923 0 0 3 0x14200 bored softnet 58306 477259 0 0 3 0x14200 bored softnet 4600 86945 0 0 3 0x14200 bored softnet 36179 107546 0 0 3 0x14200 bored softnet 99453 166918 0 0 3 0x14200 bored systqmp 39783 68518 0 0 3 0x14200 bored systq 44277 211214 0 0 3 0x40014200 bored softclock 17995 122381 0 0 3 0x40014200 idle0 1 391361 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10258 6665K 7294K 78643K 50136 0 pcb 13 16K 18K 78643K 3465 0 rtable 202 17K 18K 78643K 2930 0 ifaddr 106 27K 31K 78643K 1370 0 sysctl 3 1K 2K 78643K 6 0 counters 60 36K 36K 78643K 660 0 ioctlops 1 1K 8K 78643K 5964 0 iov 0 0K 28K 78643K 2845 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1396 87K 88K 78643K 13554 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 198 0 VM map 2 1K 1K 78643K 2 0 sem 17 2K 2K 78643K 165 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 93K 78643K 22023 0 sigio 0 0K 0K 78643K 216 0 proc 74 91K 128K 78643K 2910 0 subproc 104 6K 6K 78643K 749 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 673 0 in_multi 78 5K 6K 78643K 957 0 ether_multi 1 0K 0K 78643K 87 0 mrt 1 0K 0K 78643K 111 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 5505 0 pfkey data 0 0K 0K 78643K 17 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 704 1869K 1876K 78643K 131318 0 UVM aobj 7 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1239 0 NDP 17 0K 1K 78643K 407 0 temp 150 4727K 86647K 78643K 208984 0 kqueue 12 18K 30K 78643K 2380 0 SYN cache 2 16K 24K 78643K 4 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 1279 0 1276 17 16 1 5 0 8 0 rtentry 112 835 0 756 4 1 3 4 0 8 0 unpcb 144 56067 0 56038 281 270 11 12 0 8 9 syncache 296 89 0 89 23 23 0 1 0 8 0 tcpqe 32 135 0 135 9 9 0 1 0 8 0 tcpcb 768 7796 0 7792 295 291 4 19 0 8 3 arp 120 126 0 113 1 0 1 1 0 8 0 inpcb 368 18410 0 18402 296 292 4 19 0 8 3 nd6 48 204 0 186 1 0 1 1 0 8 0 pkpcb 40 689 0 689 31 31 0 2 0 8 0 kcovpl 48 57 0 49 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 182 0 180 26 25 1 1 0 8 0 pffrag 232 70 0 70 8 7 1 1 0 482 1 pffrnode 88 70 0 70 8 7 1 1 0 8 1 pffrent 40 397 0 397 10 9 1 1 0 8 1 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 24 639 0 630 1 0 1 1 0 8 0 pfstkey 120 639 0 630 4 2 2 4 0 8 0 pfstate 336 639 0 630 17 14 3 11 0 8 1 pfrule 1360 21 0 16 2 1 1 2 0 8 0 rttmr 136 33 0 33 9 9 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 4160 0 3773 62 34 28 31 0 8 0 art_table 32 4162 0 3774 5 1 4 4 0 8 0 art_node 16 828 0 758 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 161 0 146 1 0 1 1 0 8 0 shmpl 112 7 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 31602 0 30088 95 0 95 95 0 8 0 ffsino 272 31602 0 30088 102 0 102 102 0 8 0 nchpl 144 60726 0 59082 64 0 64 64 0 8 0 rtmask 32 10 0 10 5 4 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 214123 0 214123 8 7 1 2 0 8 1 percpumem 16 342 0 300 1 0 1 1 0 8 0 vcpupl 2048 453 0 1 57 0 57 57 0 8 0 vmpool 568 490 0 38 33 0 33 33 0 8 0 kstatmem 264 538 0 504 4 1 3 3 0 8 0 scsiplug 72 21 0 21 8 8 0 1 0 8 0 scxspl 216 180748 0 180748 54 53 1 8 0 8 1 plimitpl 152 3196 0 3180 1 0 1 1 0 8 0 sigapl 424 22289 0 22221 11 3 8 8 0 8 0 futexpl 64 202838 0 202835 3 2 1 1 0 8 0 knotepl 120 1401 0 0 17 0 17 17 0 8 0 kqueuepl 216 5553 0 5545 104 103 1 5 0 8 0 pipepl 320 4403 0 4375 138 135 3 9 0 8 0 fdescpl 496 22215 0 22186 5 1 4 5 0 8 0 filepl 152 186059 0 185797 326 302 24 24 0 8 13 lockfpl 104 8539 0 8537 16 15 1 3 0 8 0 lockfspl 48 2702 0 2700 1 0 1 1 0 8 0 sessionpl 144 75 0 58 1 0 1 1 0 8 0 pgrppl 48 352 0 335 1 0 1 1 0 8 0 ucredpl 104 17219 0 17204 1 0 1 1 0 8 0 zombiepl 144 22221 0 22221 1 0 1 1 0 8 1 processpl 1064 22289 0 22221 5 0 5 5 0 8 0 procpl 672 63678 0 63588 30 21 9 10 0 8 0 srpgc 96 67 0 67 25 25 0 1 0 8 0 sosppl 168 148 0 148 29 28 1 1 0 8 1 sockpl 488 76533 0 76494 1686 1644 42 42 0 8 36 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 41 0 0 6 3 3 3 0 8 0 mcl12k 12288 49 0 0 2 0 2 2 0 8 0 mcl9k 9216 32 0 0 2 0 2 2 0 8 0 mcl8k 8192 50 0 0 5 2 3 3 0 8 0 mcl4k 4096 41 0 0 4 0 4 4 0 8 0 mcl2k2 2112 14 0 0 1 0 1 1 0 8 0 mcl2k 2048 575 0 0 42 21 21 42 0 8 0 mtagpl 96 1315 0 0 21 0 21 21 0 8 0 mbufpl 256 1791 0 0 67 2 65 66 0 8 0 bufpl 288 37017 0 30688 453 0 453 453 0 8 0 anonpl 24 4296363 0 4267042 474 293 181 229 0 186 0 amapchunkpl 152 380834 0 379642 186 114 72 75 0 158 23 amappl16 200 58369 0 57427 208 158 50 51 0 8 0 amappl15 192 5115 0 5102 1 0 1 1 0 8 0 amappl14 184 3575 0 3568 1 0 1 1 0 8 0 amappl13 176 1418 0 1417 1 0 1 1 0 8 0 amappl12 168 2363 0 2357 1 0 1 1 0 8 0 amappl11 160 3507 0 3483 3 1 2 2 0 8 0 amappl10 152 2415 0 2407 1 0 1 1 0 8 0 amappl9 144 2527 0 2524 1 0 1 1 0 8 0 amappl8 136 3986 0 3820 6 0 6 6 0 8 0 amappl7 128 2452 0 2427 1 0 1 1 0 8 0 amappl6 120 2555 0 2540 2 1 1 2 0 8 0 amappl5 112 19555 0 19535 1 0 1 1 0 8 0 amappl4 104 7824 0 7780 7 5 2 2 0 8 0 amappl3 96 69526 0 69470 2 0 2 2 0 8 0 amappl2 88 4300 0 4257 2 0 2 2 0 8 0 amappl1 80 552793 0 552121 20 4 16 20 0 8 0 amappl 88 129240 0 128913 10 2 8 8 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 9 0 3 1 0 1 1 0 8 0 uaddrrnd 24 22705 0 22224 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 22705 0 22224 3 0 3 3 0 8 0 vmmpekpl 168 158753 0 158629 6 0 6 6 0 8 0 vmmpepl 168 2163786 0 2158897 505 281 224 242 0 357 0 vmsppl 368 22704 0 22224 45 1 44 44 0 8 0 rwobjpl 56 529107 0 520945 148 31 117 117 0 8 0 pdppl 4096 45417 0 44900 1380 859 521 522 0 8 4 pvpl 32 8136249 0 8109291 700 474 226 320 0 265 1 pmappl 248 22704 0 22224 33 2 31 31 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2679 0 1264 41 0 41 41 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff80002883a7e2,ffff80002883a8f4,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002883a7a8,fffffffe,42,ffff8000006d1e6c,fffffffe) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e4ef028,ffff8000006d1c00) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e4ef028,ffff8000006d1c00) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff8000006d1c00,1,ffff8000212efcf0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff8000006d1c00,1,ffff8000212efcf0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80779641d8,82907003,ffff8000006d1c00,1,fffffd807f7d73a8,ffff8000212efcf0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80661dfda8,82907003,ffff8000006d1c00,ffff8000212efcf0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000212efcf0,ffff80002e4ef378,ffff80002e4ef3c0) at sys_ioctl+0x4a2 syscall(ffff80002e4ef440) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4ef440) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3a8e0eba710, 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: -5