kernel: integer divide fault trap, code=0 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace rc4_keysetup(ffff80002461fcaa,ffff80002461fdbc,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002461fc90,d2d,324,ffff800000da0e6c,d2d) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e992e98,ffff800000da0c00) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e992e98,ffff800000da0c00) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000da0c00,9,ffff800026241a48) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000da0c00,9,ffff800026241a48) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8062ae7958,82907003,ffff800000da0c00,9,fffffd807f7d7618,ffff800026241a48) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80680d9ae0,82907003,ffff800000da0c00,ffff800026241a48) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800026241a48,ffff80002e9931e8,ffff80002e993240) at sys_ioctl+0x49e syscall(ffff80002e9932b0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd4690ab1730, count: -9 ddb> show registers rdi 0xffff800026256000 rsi 0 rbp 0xffff80002e992d20 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0xa42666ae9d4a7358 r11 0x141cd8caa4c968e r12 0xffff80002461fdbc r13 0 r14 0xffff80002461fcaa r15 0 rip 0xffffffff821ab99f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e992cc0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.3) pid=522704 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000262417a8,0xffff8000262402b8 process=0xffff800027e5b798 user=0xffff80002e98e000, vmspace=0xfffffd8078055220 estcpu=32, cpticks=1, pctcpu=0.1 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 64746 58458 62884 0 2 0 syz-executor.0 64746 223973 62884 0 3 0x4000080 fsleep syz-executor.0 64746 207123 62884 0 3 0x4000080 fsleep syz-executor.0 4497 195478 19986 0 2 0 syz-executor.3 * 4497 522704 19986 0 7 0x4000000 syz-executor.3 45001 214271 9176 0 3 0x80 nanoslp syz-executor.1 45001 422257 9176 0 3 0x4000080 piperd syz-executor.1 45001 350950 9176 0 3 0x4000080 fsleep syz-executor.1 9176 454835 42846 0 3 0x82 nanoslp syz-executor.1 11531 467242 42846 0 3 0x82 piperd syz-executor.5 32810 285506 0 0 3 0x14280 nfsidl nfsio 78960 514773 0 0 3 0x14280 nfsidl nfsio 7510 128838 0 0 3 0x14280 nfsidl nfsio 31134 470928 0 0 3 0x14280 nfsidl nfsio 92224 155056 0 0 3 0x14280 nfsidl nfsio 84985 310257 0 0 3 0x14280 nfsidl nfsio 17610 513179 0 0 3 0x14280 nfsidl nfsio 2128 212801 0 0 3 0x14280 nfsidl nfsio 35842 98391 0 0 3 0x14280 nfsidl nfsio 19622 118268 0 0 3 0x14280 nfsidl nfsio 63429 446986 0 0 3 0x14280 nfsidl nfsio 62690 468742 0 0 3 0x14280 nfsidl nfsio 34791 351895 0 0 3 0x14280 nfsidl nfsio 86324 498233 0 0 3 0x14280 nfsidl nfsio 83978 73618 0 0 3 0x14280 nfsidl nfsio 93067 341229 0 0 3 0x14280 nfsidl nfsio 41704 442327 0 0 3 0x14280 nfsidl nfsio 66339 171517 0 0 3 0x14280 nfsidl nfsio 42568 227671 0 0 3 0x14280 nfsidl nfsio 36112 402325 0 0 3 0x14280 nfsidl nfsio 95521 313986 42846 0 3 0x82 piperd syz-executor.4 7901 27296 1 0 3 0x100083 ttyin getty 62884 222937 42846 0 3 0x82 nanoslp syz-executor.0 69631 158213 42846 0 2 0x482 syz-executor.6 35691 274482 42846 0 3 0x82 piperd syz-executor.2 19986 259536 42846 0 3 0x82 nanoslp syz-executor.3 27485 309104 42846 0 3 0x82 piperd syz-executor.7 84574 48257 0 0 3 0x14200 bored sosplice 42846 462957 79006 0 3 0x82 thrsleep syz-fuzzer 42846 380607 79006 0 3 0x4000082 nanoslp syz-fuzzer 42846 449310 79006 0 3 0x4000082 wait syz-fuzzer 42846 116539 79006 0 3 0x4000082 wait syz-fuzzer 42846 195412 79006 0 3 0x4000082 kqread syz-fuzzer 42846 81324 79006 0 3 0x4000082 thrsleep syz-fuzzer 42846 496495 79006 0 3 0x4000082 wait syz-fuzzer 42846 136556 79006 0 3 0x4000082 thrsleep syz-fuzzer 42846 516875 79006 0 3 0x4000082 thrsleep syz-fuzzer 42846 151795 79006 0 3 0x4000082 wait syz-fuzzer 42846 436388 79006 0 3 0x4000082 wait syz-fuzzer 42846 337801 79006 0 3 0x4000082 wait syz-fuzzer 42846 194451 79006 0 3 0x4000082 wait syz-fuzzer 42846 209712 79006 0 3 0x4000082 wait syz-fuzzer 79006 165195 606 0 3 0x10008a sigsusp ksh 606 383521 2662 0 3 0x9a kqread sshd 2662 337966 1 0 3 0x88 kqread sshd 96490 11919 21095 73 3 0x1100090 kqread syslogd 21095 479997 1 0 3 0x100082 netio syslogd 78495 290540 1 0 3 0x100080 kqread resolvd 41652 356501 7585 77 3 0x100092 kqread dhcpleased 76873 12260 7585 77 3 0x100092 kqread dhcpleased 7585 496682 1 0 3 0x80 kqread dhcpleased 61462 114385 0 0 3 0x14200 bored smr 87717 18715 0 0 2 0x14200 zerothread 74953 342510 0 0 3 0x14200 aiodoned aiodoned 3555 145380 0 0 3 0x14200 syncer update 66399 129697 0 0 3 0x14200 cleaner cleaner 84007 46571 0 0 3 0x14200 reaper reaper 7247 268112 0 0 3 0x14200 pgdaemon pagedaemon 80229 475079 0 0 3 0x14200 bored viomb 84407 85942 0 0 3 0x40014200 acpi0 acpi0 64256 472603 0 0 3 0x14200 bored softnet 52591 507948 0 0 3 0x14200 bored softnet 36329 261818 0 0 3 0x14200 bored softnet 59039 163065 0 0 3 0x14200 bored softnet 67842 465864 0 0 3 0x14200 bored systqmp 96808 153188 0 0 3 0x14200 bored systq 98479 121505 0 0 2 0x40014200 softclock 71402 22825 0 0 3 0x40014200 idle0 1 337252 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 6453K 7935K 78643K 71123 0 pcb 13 18K 23K 78643K 9992 0 rtable 264 21K 22K 78643K 9436 0 ifaddr 122 33K 37K 78643K 3193 0 sysctl 3 1K 3K 78643K 9 0 counters 30 17K 17K 78643K 615 0 ioctlops 1 1K 4K 78643K 9426 0 iov 0 0K 28K 78643K 4878 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1599 100K 100K 78643K 24137 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 299 0 VM map 2 0K 0K 78643K 2 0 sem 12 28K 56K 78643K 40 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 73K 78643K 37964 0 sigio 0 0K 0K 78643K 1187 0 proc 62 59K 83K 78643K 7933 0 subproc 104 6K 6K 78643K 2356 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2161 0 in_multi 92 6K 7K 78643K 3539 0 ether_multi 1 0K 0K 78643K 158 0 mrt 2 0K 0K 78643K 674 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 12499 0 pfkey data 0 0K 0K 78643K 164 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 793 2818K 7286K 78643K 204676 0 UVM aobj 131 5K 5K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 993 0 NDP 19 0K 2K 78643K 1184 0 temp 158 4719K 70255K 78643K 498041 0 kqueue 12 18K 28K 78643K 3907 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 3212 0 3209 41 40 1 3 0 8 0 rtentry 112 3025 0 2921 6 2 4 4 0 8 0 unpcb 144 25917 0 25904 254 251 3 8 0 8 2 syncache 296 23 0 23 6 6 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 5 0 5 2 2 0 1 0 8 0 tcpcb 768 12132 0 12124 487 485 2 20 0 8 1 arp 88 428 0 410 1 0 1 1 0 8 0 ipq 40 100 0 100 14 14 0 1 0 8 0 ipqe 40 257 0 257 14 14 0 1 0 8 0 inpcb 320 39136 0 39129 609 602 7 20 0 8 6 ip6q 72 9 0 9 4 4 0 1 0 8 0 ip6af 40 16 0 16 4 4 0 1 0 8 0 nd6 48 628 0 604 1 0 1 1 0 8 0 pkpcb 40 275 0 275 26 26 0 1 0 8 0 kcovpl 48 181 0 173 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 299 0 297 45 44 1 1 0 8 0 pfstscr 40 80 0 77 1 0 1 1 0 8 0 pfosfp 40 3 0 2 1 0 1 1 0 8 0 pfosfpen 112 3 0 2 1 0 1 1 0 8 0 pfrktable 1344 191 0 186 2 1 1 2 0 8 0 pfanchor 1280 80 0 12 6 0 6 6 0 8 0 pftag 88 47 0 44 1 0 1 1 0 8 0 pfstitem 24 12 0 6 1 0 1 1 0 8 0 pfstkey 120 154 0 149 1 0 1 1 0 8 0 pfstate 336 77 0 74 1 0 1 1 0 8 0 pfrule 1360 325 0 278 5 1 4 5 0 8 0 rttmr 136 262 0 262 15 15 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 23331 0 22913 130 101 29 31 0 8 1 art_table 32 23332 0 22913 9 5 4 4 0 8 0 art_node 16 2968 0 2876 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 16 4 4 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 53941 0 52315 102 0 102 102 0 8 0 ffsino 240 53941 0 52315 96 0 96 96 0 8 0 nchpl 144 102805 0 101165 63 0 63 63 0 8 0 rtmask 32 34 0 34 12 12 0 1 0 8 0 uvmvnodes 80 8744 0 0 179 0 179 179 0 8 0 vnodes 216 8744 0 0 486 0 486 486 0 8 0 namei 1024 389730 0 389730 23 22 1 2 0 8 1 vcpupl 2048 299 0 0 38 0 38 38 0 8 0 vmpool 536 399 0 100 21 1 20 20 0 8 0 pfiaddrpl 120 68 0 54 1 0 1 1 0 8 0 kstatmem 264 1064 0 1026 5 2 3 3 0 8 0 scsiplug 72 42 0 42 10 10 0 1 0 8 0 scxspl 216 296567 0 296567 74 73 1 8 0 8 1 plimitpl 152 4569 0 4554 1 0 1 1 0 8 0 sigapl 424 38000 0 37938 12 4 8 8 0 8 0 futexpl 64 407852 0 407849 16 15 1 1 0 8 0 knotepl 120 719172 0 719092 212 205 7 11 0 8 2 kqueuepl 184 10064 0 10056 139 138 1 7 0 8 0 pipepl 288 52815 0 52785 401 390 11 14 0 8 8 fdescpl 432 37878 0 37854 4 0 4 4 0 8 0 filepl 120 354152 0 353910 484 469 15 21 0 8 7 lockfpl 104 10419 0 10417 23 21 2 4 0 8 1 lockfspl 48 2972 0 2970 1 0 1 1 0 8 0 sessionpl 144 204 0 188 1 0 1 1 0 8 0 pgrppl 48 447 0 431 1 0 1 1 0 8 0 ucredpl 104 41938 0 41927 1 0 1 1 0 8 0 zombiepl 144 37939 0 37938 7 6 1 1 0 8 0 processpl 1000 38000 0 37938 17 8 9 9 0 8 0 procpl 672 95520 0 95440 81 72 9 9 0 8 1 sosppl 168 283 0 283 46 46 0 1 0 8 0 sockpl 456 68575 0 68552 1501 1490 11 44 0 8 8 mcl64k 65536 1244 0 1244 88 87 1 1 0 8 1 mcl16k 16384 390 0 390 87 86 1 1 0 8 1 mcl12k 12288 1305 0 1305 83 82 1 1 0 8 1 mcl9k 9216 424 0 424 80 79 1 1 0 8 1 mcl8k 8192 2045 0 2045 80 79 1 1 0 8 1 mcl4k 4096 4082 0 4082 59 58 1 3 0 8 1 mcl2k2 2112 321 0 321 84 84 0 1 0 8 0 mcl2k 2048 150136 0 150074 101 91 10 26 0 8 1 mtagpl 96 8383 0 8114 74 67 7 17 0 8 0 mbufpl 256 467798 0 467325 361 328 33 69 0 8 2 bufpl 288 64870 0 56126 625 0 625 625 0 8 0 anonpl 24 7071692 0 7049019 700 548 152 204 0 188 0 amapchunkpl 152 2139667 0 2138685 26239 23510 2729 4429 0 158 2686 amappl16 200 102584 0 101844 410 368 42 60 0 8 1 amappl15 192 7405 0 7397 1 0 1 1 0 8 0 amappl14 184 2697 0 2690 1 0 1 1 0 8 0 amappl13 176 6122 0 6121 1 0 1 1 0 8 0 amappl12 168 4181 0 4176 1 0 1 1 0 8 0 amappl11 160 5946 0 5929 1 0 1 1 0 8 0 amappl10 152 6933 0 6931 5 4 1 1 0 8 0 amappl9 144 3316 0 3313 1 0 1 1 0 8 0 amappl8 136 6843 0 6722 6 1 5 5 0 8 0 amappl7 128 3886 0 3864 1 0 1 1 0 8 0 amappl6 120 4242 0 4218 2 1 1 2 0 8 0 amappl5 112 34238 0 34223 1 0 1 1 0 8 0 amappl4 104 14486 0 14455 3 1 2 2 0 8 0 amappl3 96 113909 0 113850 3 0 3 3 0 8 0 amappl2 88 10069 0 10030 2 0 2 2 0 8 0 amappl1 80 916356 0 915764 24 9 15 19 0 8 0 amappl 88 200460 0 200128 11 3 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 38277 0 37954 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 38277 0 37954 2 0 2 2 0 8 0 vmmpekpl 168 433742 0 433640 5 0 5 5 0 8 0 vmmpepl 168 3699253 0 3696347 608 454 154 174 0 357 0 vmsppl 272 38276 0 37954 24 2 22 22 0 8 0 rwobjpl 24 867436 0 856613 84 17 67 67 0 8 1 pdppl 4096 76560 0 76207 2476 2113 363 363 0 8 10 pvpl 32 13983488 0 13962066 991 790 201 312 0 265 6 pmappl 216 38276 0 37954 21 2 19 19 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 4705 0 3360 39 0 39 39 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002461fcaa,ffff80002461fdbc,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002461fc90,d2d,324,ffff800000da0e6c,d2d) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e992e98,ffff800000da0c00) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e992e98,ffff800000da0c00) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000da0c00,9,ffff800026241a48) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000da0c00,9,ffff800026241a48) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8062ae7958,82907003,ffff800000da0c00,9,fffffd807f7d7618,ffff800026241a48) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80680d9ae0,82907003,ffff800000da0c00,ffff800026241a48) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800026241a48,ffff80002e9931e8,ffff80002e993240) at sys_ioctl+0x49e syscall(ffff80002e9932b0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd4690ab1730, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002461fcaa,ffff80002461fdbc,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002461fc90,d2d,324,ffff800000da0e6c,d2d) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e992e98,ffff800000da0c00) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e992e98,ffff800000da0c00) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000da0c00,9,ffff800026241a48) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000da0c00,9,ffff800026241a48) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8062ae7958,82907003,ffff800000da0c00,9,fffffd807f7d7618,ffff800026241a48) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80680d9ae0,82907003,ffff800000da0c00,ffff800026241a48) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800026241a48,ffff80002e9931e8,ffff80002e993240) at sys_ioctl+0x49e syscall(ffff80002e9932b0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd4690ab1730, count: -9