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(ffff80002e99cf5a,ffff80002e99d06c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e99cf40,ffffe4bd,67bb,ffff800000d2e66c,ffffe4bd) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff800029853788,ffff800000d2e400) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff800029853788,ffff800000d2e400) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d2e400,1,ffff8000217b9508) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d2e400,1,ffff8000217b9508) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8061e11138,82907003,ffff800000d2e400,1,fffffd807f7d7618,ffff8000217b9508) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807cf2fcc0,82907003,ffff800000d2e400,ffff8000217b9508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000217b9508,ffff800029853ad8,ffff800029853b30) at sys_ioctl+0x49e syscall(ffff800029853ba0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8db78e055d0, count: -9 ddb> show registers rdi 0xffff80002b480000 rsi 0 rbp 0xffff800029853610 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x3343ec32eb8dc68a r11 0x621583138be65cc r12 0xffff80002e99d06c r13 0 r14 0xffff80002e99cf5a r15 0 rip 0xffffffff81e480ff rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000298535b0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.1) pid=207281 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8a88,0xffff8000217b8d38 process=0xffff80002170b3b0 user=0xffff80002984e000, vmspace=0xfffffd80604efcc8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 31817 442965 75411 0 3 0x80 nanoslp syz-executor.5 31817 475757 75411 0 3 0x4000080 fsleep syz-executor.5 39167 201650 74091 0 2 0 syz-executor.1 *39167 207281 74091 0 7 0x4000000 syz-executor.1 17087 42059 86296 0 3 0x80 nanoslp syz-executor.3 17087 371119 86296 0 3 0x4000080 kqread syz-executor.3 17087 490033 86296 0 3 0x4000080 fsleep syz-executor.3 65964 276656 55268 0 3 0x82 piperd syz-executor.7 32385 72896 0 0 3 0x14200 acct acct 28366 318592 55268 0 2 0x2 syz-executor.2 75411 315229 55268 0 3 0x82 nanoslp syz-executor.5 85743 126802 55268 0 3 0x82 nanoslp syz-executor.4 86296 87206 55268 0 3 0x82 nanoslp syz-executor.3 41087 55467 55268 0 3 0x82 piperd syz-executor.6 74091 161142 55268 0 3 0x82 nanoslp syz-executor.1 87478 358055 55268 0 3 0x82 piperd syz-executor.0 92059 208643 1 0 3 0x100083 ttyin getty 49288 216241 0 0 3 0x14200 bored sosplice 55268 261991 83034 0 3 0x82 thrsleep syz-fuzzer 55268 307982 83034 0 3 0x4000082 nanoslp syz-fuzzer 55268 383754 83034 0 3 0x4000082 thrsleep syz-fuzzer 55268 35054 83034 0 3 0x4000082 kqread syz-fuzzer 55268 95289 83034 0 3 0x4000082 wait syz-fuzzer 55268 362662 83034 0 3 0x4000082 thrsleep syz-fuzzer 55268 94066 83034 0 3 0x4000082 wait syz-fuzzer 55268 522652 83034 0 3 0x4000082 thrsleep syz-fuzzer 55268 460737 83034 0 3 0x4000082 wait syz-fuzzer 55268 411652 83034 0 3 0x4000082 wait syz-fuzzer 55268 72590 83034 0 3 0x4000082 wait syz-fuzzer 55268 239262 83034 0 3 0x4000082 wait syz-fuzzer 55268 366451 83034 0 3 0x4000082 wait syz-fuzzer 55268 156364 83034 0 3 0x4000082 wait syz-fuzzer 83034 269382 2082 0 3 0x10008a sigsusp ksh 2082 398792 29944 0 3 0x9a kqread sshd 29944 75286 1 0 3 0x88 kqread sshd 78806 281238 96332 73 3 0x1100090 kqread syslogd 96332 250154 1 0 3 0x100082 netio syslogd 74060 148856 1 0 3 0x100080 kqread resolvd 91264 6330 15571 77 3 0x100092 kqread dhcpleased 39398 227880 15571 77 3 0x100092 kqread dhcpleased 15571 418660 1 0 3 0x80 kqread dhcpleased 48955 177793 0 0 3 0x14200 bored smr 36795 118561 0 0 2 0x14200 zerothread 98649 439996 0 0 3 0x14200 aiodoned aiodoned 89611 141596 0 0 3 0x14200 syncer update 58381 184311 0 0 3 0x14200 cleaner cleaner 20870 214985 0 0 3 0x14200 reaper reaper 39056 123195 0 0 3 0x14200 pgdaemon pagedaemon 53120 291867 0 0 3 0x14200 bored viomb 23054 115131 0 0 3 0x40014200 acpi0 acpi0 22114 193231 0 0 3 0x14200 bored softnet 41850 126478 0 0 3 0x14200 bored softnet 85477 506016 0 0 3 0x14200 bored softnet 91301 315795 0 0 3 0x14200 bored softnet 78601 254720 0 0 3 0x14200 bored systqmp 10611 496492 0 0 3 0x14200 bored systq 70152 274753 0 0 3 0x40014200 bored softclock 13495 193431 0 0 3 0x40014200 idle0 1 327302 0 0 3 0x80082 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 10219 6447K 7675K 78643K 58467 0 pcb 13 18K 23K 78643K 5791 0 rtable 305 32K 34K 78643K 9086 0 ifaddr 149 37K 37K 78643K 3497 0 sysctl 3 1K 3K 78643K 11 0 counters 30 17K 17K 78643K 357 0 ioctlops 1 1K 4K 78643K 11822 0 iov 0 0K 32K 78643K 3958 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1535 96K 96K 78643K 18843 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 285 0 VM map 2 0K 0K 78643K 2 0 sem 15 20K 36K 78643K 418 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 69K 78643K 39873 0 sigio 0 0K 0K 78643K 9926 0 proc 71 59K 84K 78643K 5716 0 subproc 104 6K 7K 78643K 1924 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1519 0 in_multi 90 6K 6K 78643K 1962 0 ether_multi 1 0K 0K 78643K 171 0 mrt 4 0K 0K 78643K 208 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 223 996K 996K 78643K 223 0 exec 0 0K 2K 78643K 7606 0 pfkey data 0 0K 0K 78643K 22 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 614 1371K 1387K 78643K 209966 0 UVM aobj 131 6K 6K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 935 0 NDP 19 0K 2K 78643K 658 0 temp 147 4718K 66414K 78643K 460921 0 kqueue 15 20K 28K 78643K 2581 0 SYN cache 2 24K 32K 78643K 4 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 2128 0 2125 24 22 2 3 0 8 1 rtentry 112 2337 0 2235 6 2 4 4 0 8 0 unpcb 144 45113 0 45094 283 279 4 10 0 8 3 syncache 296 93 0 93 28 28 0 1 0 8 0 tcpqe 32 575 0 575 20 20 0 1 0 8 0 tcpcb 768 8868 0 8858 371 363 8 21 0 8 6 arp 88 396 0 376 1 0 1 1 0 8 0 ipq 40 20 0 19 10 9 1 1 0 8 0 ipqe 40 50 0 46 10 9 1 1 0 8 0 inpcb 320 29398 0 29388 422 415 7 17 0 8 5 nd6 48 543 0 518 1 0 1 1 0 8 0 pkpcb 40 300 0 300 23 23 0 1 0 8 0 kcovpl 48 148 0 140 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 107 0 105 25 24 1 1 0 8 0 pfstscr 40 395 0 391 7 6 1 1 0 8 0 pffrag 232 361 0 361 3 3 0 1 0 482 0 pffrnode 88 361 0 361 3 3 0 1 0 8 0 pffrent 40 1494 0 1494 3 3 0 1 0 8 0 pfosfp 40 60 0 52 1 0 1 1 0 8 0 pfosfpen 112 60 0 29 1 0 1 1 0 8 0 pfrke_plain 168 3 0 3 3 3 0 1 0 8 0 pfrktable 1344 1018 0 988 19 16 3 3 0 8 0 pfanchor 1280 511 0 260 27 6 21 22 0 8 0 pftag 88 183 0 171 2 1 1 1 0 8 0 pfqueue 264 49 0 49 5 5 0 1 0 8 0 pfstitem 24 39 0 31 3 2 1 1 0 8 0 pfstkey 120 629 0 625 8 7 1 1 0 8 0 pfstate 336 320 0 316 8 7 1 1 0 8 0 pfrule 1360 2279 0 2083 31 14 17 17 0 8 0 rttmr 136 14 0 14 4 4 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 8795 0 8366 97 70 27 41 0 8 0 art_table 32 8797 0 8367 6 2 4 6 0 8 0 art_node 16 2260 0 2173 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 401 0 388 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 49837 0 48245 100 0 100 100 0 8 0 ffsino 240 49837 0 48245 95 1 94 94 0 8 0 nchpl 144 101204 0 99571 63 0 63 63 0 8 0 rtmask 32 7 0 7 3 3 0 1 0 8 0 uvmvnodes 80 8563 0 0 175 0 175 175 0 8 0 vnodes 216 8563 0 0 476 0 476 476 0 8 0 namei 1024 350094 0 350094 18 17 1 2 0 8 1 vcpupl 2048 514 0 2 65 0 65 65 0 8 0 vmpool 536 587 0 75 35 0 35 35 0 8 0 pfiaddrpl 120 601 0 523 7 4 3 3 0 8 0 kstatmem 264 684 0 650 5 2 3 3 0 8 0 scsiplug 72 40 0 40 11 11 0 1 0 8 0 scxspl 216 295058 0 295058 44 43 1 8 0 8 1 plimitpl 152 3946 0 3932 1 0 1 1 0 8 0 sigapl 424 39888 0 39845 8 2 6 8 0 8 0 futexpl 64 355590 0 355588 10 9 1 1 0 8 0 knotepl 120 536518 0 536437 227 214 13 17 0 8 8 kqueuepl 184 5910 0 5901 68 67 1 7 0 8 0 pipepl 288 5885 0 5857 130 125 5 7 0 8 2 fdescpl 432 39846 0 39822 5 1 4 4 0 8 0 filepl 120 247420 0 247177 301 289 12 19 0 8 2 lockfpl 104 8391 0 8389 22 21 1 2 0 8 0 lockfspl 48 2528 0 2526 1 0 1 1 0 8 0 sessionpl 144 167 0 151 1 0 1 1 0 8 0 pgrppl 48 980 0 964 1 0 1 1 0 8 0 ucredpl 104 25119 0 25107 1 0 1 1 0 8 0 zombiepl 144 39846 0 39845 4 3 1 1 0 8 0 processpl 1000 39888 0 39845 11 5 6 9 0 8 0 procpl 672 96485 0 96425 31 24 7 9 0 8 1 sosppl 168 316 0 316 37 36 1 1 0 8 1 sockpl 456 76964 0 76929 1354 1341 13 34 0 8 8 mcl64k 65536 1051 0 1045 39 38 1 2 0 8 0 mcl16k 16384 336 0 336 79 78 1 1 0 8 1 mcl12k 12288 1387 0 1387 64 63 1 1 0 8 1 mcl9k 9216 558 0 558 71 70 1 1 0 8 1 mcl8k 8192 2867 0 2867 56 55 1 1 0 8 1 mcl4k 4096 3487 0 3487 51 50 1 3 0 8 1 mcl2k2 2112 250 0 250 83 82 1 1 0 8 1 mcl2k 2048 170021 0 169930 87 74 13 21 0 8 0 mtagpl 96 4763 0 4609 46 41 5 12 0 8 0 mbufpl 256 501229 0 500650 682 636 46 302 0 8 2 bufpl 288 61605 0 53042 612 0 612 612 0 8 0 anonpl 24 7113909 0 7095691 455 326 129 151 0 188 0 amapchunkpl 152 613089 0 612356 226 193 33 57 0 158 2 amappl16 200 101460 0 100703 353 309 44 63 0 8 0 amappl15 192 9032 0 9024 1 0 1 1 0 8 0 amappl14 184 3369 0 3362 1 0 1 1 0 8 0 amappl13 176 5433 0 5430 1 0 1 1 0 8 0 amappl12 168 6023 0 6015 1 0 1 1 0 8 0 amappl11 160 4089 0 4073 1 0 1 1 0 8 0 amappl10 152 4011 0 4007 1 0 1 1 0 8 0 amappl9 144 5330 0 5324 1 0 1 1 0 8 0 amappl8 136 7476 0 7268 8 0 8 8 0 8 0 amappl7 128 4415 0 4395 1 0 1 1 0 8 0 amappl6 120 5985 0 5963 2 1 1 2 0 8 0 amappl5 112 37137 0 37126 1 0 1 1 0 8 0 amappl4 104 9607 0 9571 8 7 1 2 0 8 0 amappl3 96 119741 0 119686 2 0 2 2 0 8 0 amappl2 88 8599 0 8547 3 1 2 2 0 8 0 amappl1 80 953140 0 952545 21 6 15 19 0 8 0 amappl 88 206549 0 206303 11 4 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 40433 0 39897 4 0 4 4 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 40433 0 39897 4 0 4 4 0 8 0 vmmpekpl 168 244377 0 244267 6 0 6 6 0 8 0 vmmpepl 168 3844061 0 3840272 753 554 199 236 0 357 8 vmsppl 272 40432 0 39897 41 4 37 37 0 8 0 rwobjpl 24 883455 0 872814 75 10 65 65 0 8 0 pdppl 4096 80872 0 80306 2414 1838 576 578 0 8 10 pvpl 32 14395189 0 14375279 760 569 191 237 0 265 0 pmappl 216 40432 0 39897 31 0 31 31 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 4614 0 3010 57 11 46 52 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002e99cf5a,ffff80002e99d06c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e99cf40,ffffe4bd,67bb,ffff800000d2e66c,ffffe4bd) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff800029853788,ffff800000d2e400) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff800029853788,ffff800000d2e400) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d2e400,1,ffff8000217b9508) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d2e400,1,ffff8000217b9508) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8061e11138,82907003,ffff800000d2e400,1,fffffd807f7d7618,ffff8000217b9508) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807cf2fcc0,82907003,ffff800000d2e400,ffff8000217b9508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000217b9508,ffff800029853ad8,ffff800029853b30) at sys_ioctl+0x49e syscall(ffff800029853ba0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8db78e055d0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002e99cf5a,ffff80002e99d06c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e99cf40,ffffe4bd,67bb,ffff800000d2e66c,ffffe4bd) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff800029853788,ffff800000d2e400) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff800029853788,ffff800000d2e400) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d2e400,1,ffff8000217b9508) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d2e400,1,ffff8000217b9508) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8061e11138,82907003,ffff800000d2e400,1,fffffd807f7d7618,ffff8000217b9508) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807cf2fcc0,82907003,ffff800000d2e400,ffff8000217b9508) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000217b9508,ffff800029853ad8,ffff800029853b30) at sys_ioctl+0x49e syscall(ffff800029853ba0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8db78e055d0, count: -9