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(ffff80002801f37a,ffff80002801f48c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002801f360,6908,2e9c,ffff800000c4626c,6908) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002ea059f8,ffff800000c46000) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002ea059f8,ffff800000c46000) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000c46000,1,ffff8000216f1ce0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000c46000,1,ffff8000216f1ce0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807c045b10,82907003,ffff800000c46000,1,fffffd807f7d7270,ffff8000216f1ce0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8068cf7880,82907003,ffff800000c46000,ffff8000216f1ce0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000216f1ce0,ffff80002ea05d48,ffff80002ea05da0) at sys_ioctl+0x49e syscall(ffff80002ea05e10) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d3fd01e40, count: -9 ddb> show registers rdi 0xffff8000231e4000 rsi 0 rbp 0xffff80002ea05880 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x723f209b6501d37a r11 0xacf25917bcfac3af r12 0xffff80002801f48c r13 0 r14 0xffff80002801f37a r15 0 rip 0xffffffff8187e55f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002ea05820 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.3) pid=23790 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000216f07e0,0xffff8000216f1a50 process=0xffff800021710410 user=0xffff80002ea00000, vmspace=0xfffffd806fbd4de0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 42189 9887 17553 0 2 0 syz-executor.3 *42189 23790 17553 0 7 0x4000000 syz-executor.3 65327 129474 68702 0 3 0x80 nanoslp syz-executor.2 65327 142288 68702 0 3 0x4000080 fsleep syz-executor.2 94519 376602 61809 0 3 0x80 nanoslp syz-executor.1 94519 263114 61809 0 3 0x4000080 fsleep syz-executor.1 28061 309742 43132 0 2 0 syz-executor.4 28061 8062 43132 0 3 0x4000080 pipewr syz-executor.4 28061 408769 43132 0 3 0x4000080 fsleep syz-executor.4 28061 119425 43132 0 3 0x4000080 fsleep syz-executor.4 60315 497352 30664 0 2 0x2 syz-executor.7 43132 7410 30664 0 3 0x82 nanoslp syz-executor.4 17553 246261 30664 0 3 0x82 nanoslp syz-executor.3 87496 245173 1 0 3 0x100083 ttyin getty 72251 113678 0 0 3 0x14280 nfsidl nfsio 77619 313270 0 0 3 0x14280 nfsidl nfsio 63798 450157 0 0 3 0x14280 nfsidl nfsio 45872 428633 0 0 3 0x14280 nfsidl nfsio 10620 432843 0 0 3 0x14280 nfsidl nfsio 16996 166333 0 0 3 0x14280 nfsidl nfsio 48875 454087 0 0 3 0x14280 nfsidl nfsio 93100 183954 0 0 3 0x14280 nfsidl nfsio 30455 80608 0 0 3 0x14280 nfsidl nfsio 29709 301623 0 0 3 0x14280 nfsidl nfsio 3845 466685 0 0 3 0x14280 nfsidl nfsio 38943 430988 0 0 3 0x14280 nfsidl nfsio 77372 322561 0 0 3 0x14280 nfsidl nfsio 61411 263302 0 0 3 0x14280 nfsidl nfsio 15912 180680 0 0 3 0x14280 nfsidl nfsio 54507 250259 0 0 3 0x14280 nfsidl nfsio 49750 238418 0 0 3 0x14280 nfsidl nfsio 1841 446659 0 0 3 0x14280 nfsidl nfsio 37833 182808 0 0 3 0x14280 nfsidl nfsio 14636 297023 0 0 3 0x14280 nfsidl nfsio 70879 514233 0 0 3 0x14200 bored sosplice 34792 75324 30664 0 2 0x2 syz-executor.6 39221 386473 30664 0 2 0x2 syz-executor.5 68702 249224 30664 0 3 0x82 nanoslp syz-executor.2 61809 482272 30664 0 3 0x82 nanoslp syz-executor.1 67631 482140 30664 0 3 0x82 nanoslp syz-executor.0 30664 460327 44137 0 3 0x82 thrsleep syz-fuzzer 30664 189205 44137 0 3 0x4000082 nanoslp syz-fuzzer 30664 146591 44137 0 3 0x4000082 thrsleep syz-fuzzer 30664 206396 44137 0 3 0x4000082 thrsleep syz-fuzzer 30664 305585 44137 0 3 0x4000082 wait syz-fuzzer 30664 353471 44137 0 3 0x4000082 wait syz-fuzzer 30664 464951 44137 0 3 0x4000082 wait syz-fuzzer 30664 428818 44137 0 3 0x4000082 thrsleep syz-fuzzer 30664 315756 44137 0 3 0x4000082 wait syz-fuzzer 30664 407662 44137 0 3 0x4000082 wait syz-fuzzer 30664 118416 44137 0 3 0x4000082 wait syz-fuzzer 30664 214264 44137 0 3 0x4000082 wait syz-fuzzer 30664 20990 44137 0 3 0x4000082 kqread syz-fuzzer 30664 177569 44137 0 3 0x4000082 wait syz-fuzzer 44137 455828 80858 0 3 0x10008a sigsusp ksh 80858 286537 65744 0 3 0x9a kqread sshd 65744 337489 1 0 3 0x88 kqread sshd 17942 11413 95975 73 3 0x1100090 kqread syslogd 95975 308785 1 0 3 0x100082 netio syslogd 504 358845 1 0 3 0x100080 kqread resolvd 93785 27158 21576 77 3 0x100092 kqread dhcpleased 70768 62366 21576 77 3 0x100092 kqread dhcpleased 21576 287460 1 0 3 0x80 kqread dhcpleased 90700 323824 0 0 3 0x14200 bored smr 9410 317368 0 0 2 0x14200 zerothread 80476 241934 0 0 3 0x14200 aiodoned aiodoned 66718 33827 0 0 3 0x14200 syncer update 29130 230227 0 0 3 0x14200 cleaner cleaner 54444 429552 0 0 3 0x14200 reaper reaper 39539 230782 0 0 3 0x14200 pgdaemon pagedaemon 87320 381599 0 0 3 0x14200 bored viomb 74229 53789 0 0 3 0x40014200 acpi0 acpi0 9599 344721 0 0 3 0x14200 bored softnet 62008 294341 0 0 3 0x14200 bored softnet 87108 69675 0 0 3 0x14200 bored softnet 84017 177154 0 0 3 0x14200 bored softnet 29340 453049 0 0 3 0x14200 bored systqmp 1195 282082 0 0 3 0x14200 bored systq 30751 325386 0 0 3 0x40014200 bored softclock 16709 436418 0 0 3 0x40014200 idle0 1 13020 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 10187 7132K 8096K 78643K 21381 0 pcb 13 17K 22K 78643K 598 0 rtable 241 8K 9K 78643K 1171 0 ifaddr 100 20K 21K 78643K 576 0 sysctl 3 1K 1K 78643K 70 0 counters 29 17K 17K 78643K 76 0 ioctlops 1 1K 4K 78643K 902 0 iov 0 0K 20K 78643K 497 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1406 88K 88K 78643K 4061 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 48 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 62 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 77K 78643K 3164 0 sigio 0 0K 0K 78643K 185 0 proc 60 59K 75K 78643K 779 0 subproc 104 6K 6K 78643K 225 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 87 0 in_multi 99 6K 7K 78643K 271 0 ether_multi 1 0K 0K 78643K 19 0 mrt 1 0K 0K 78643K 11 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 2K 78643K 1124 0 pfkey data 0 0K 0K 78643K 4 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 331 555K 555K 78643K 18299 0 UVM aobj 11 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 96 0 NDP 13 0K 2K 78643K 90 0 temp 114 4714K 5738K 78643K 46599 0 kqueue 13 20K 26K 78643K 270 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 120 178 0 175 1 0 1 1 0 8 0 rtentry 112 227 0 119 4 0 4 4 0 8 0 unpcb 144 3519 0 3506 36 32 4 10 0 8 3 syncache 296 21 0 21 7 7 0 1 0 8 0 tcpqe 32 57 0 57 3 3 0 1 0 8 0 tcpcb 768 2606 0 2564 64 59 5 23 0 8 0 arp 88 37 0 18 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 336 4390 0 4375 51 47 4 13 0 8 2 nd6 48 56 0 30 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 2 0 1 0 8 0 kcovpl 48 17 0 9 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 32 0 30 6 5 1 1 0 8 0 pfstscr 40 35 0 35 1 1 0 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 119 0 117 1 0 1 1 0 8 0 pfanchor 1280 120 0 44 7 0 7 7 0 8 0 pftag 88 7 0 3 1 0 1 1 0 8 0 pfstkey 120 70 0 70 1 1 0 1 0 8 0 pfstate 336 35 0 35 1 1 0 1 0 8 0 pfrule 1360 166 0 163 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1017 0 553 38 8 30 31 0 8 0 art_table 32 1018 0 553 4 0 4 4 0 8 0 art_node 16 226 0 131 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 34 2 1 1 1 0 8 0 semapl 112 60 0 50 1 0 1 1 0 8 0 shmpl 112 11 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5664 0 4220 91 0 91 91 0 8 0 ffsino 240 5665 0 4220 86 0 86 86 0 8 0 nchpl 144 9917 0 8297 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 1 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 37386 0 37383 2 1 1 2 0 8 0 vcpupl 2048 30 0 0 4 0 4 4 0 8 0 vmpool 536 73 0 43 3 1 2 2 0 8 0 pfiaddrpl 120 12 0 9 1 0 1 1 0 8 0 kstatmem 264 110 0 84 2 0 2 2 0 8 0 scxspl 216 27581 0 27581 15 13 2 8 0 8 2 plimitpl 152 682 0 668 1 0 1 1 0 8 0 sigapl 424 3455 0 3392 8 0 8 8 0 8 0 futexpl 64 32091 0 32087 1 0 1 1 0 8 0 knotepl 120 46511 0 46430 17 13 4 7 0 8 0 kqueuepl 184 779 0 770 12 11 1 4 0 8 0 pipepl 288 632 0 599 15 10 5 7 0 8 2 fdescpl 432 3418 0 3393 4 0 4 4 0 8 0 filepl 120 26894 0 26642 41 29 12 16 0 8 3 lockfpl 104 1095 0 1093 2 1 1 2 0 8 0 lockfspl 48 230 0 228 1 0 1 1 0 8 0 sessionpl 144 33 0 17 1 0 1 1 0 8 0 pgrppl 48 36 0 20 1 0 1 1 0 8 0 ucredpl 104 3247 0 3237 1 0 1 1 0 8 0 zombiepl 144 3393 0 3392 1 0 1 1 0 8 0 processpl 1000 3455 0 3392 11 2 9 9 0 8 0 procpl 672 7988 0 7906 14 5 9 9 0 8 1 sosppl 168 40 0 39 3 2 1 1 0 8 0 sockpl 456 8101 0 8070 166 156 10 34 0 8 6 mcl64k 65536 86 0 86 6 5 1 1 0 8 1 mcl16k 16384 40 0 40 4 4 0 1 0 8 0 mcl12k 12288 75 0 75 6 5 1 1 0 8 1 mcl9k 9216 30 0 30 7 7 0 1 0 8 0 mcl8k 8192 194 0 194 6 5 1 1 0 8 1 mcl4k 4096 284 0 284 4 3 1 1 0 8 1 mcl2k2 2112 21 0 21 5 5 0 1 0 8 0 mcl2k 2048 73019 0 72947 18 7 11 13 0 8 1 mtagpl 96 402 0 106 9 1 8 8 0 8 0 mbufpl 256 141108 0 140645 39 7 32 33 0 8 0 bufpl 288 8711 0 2307 458 0 458 458 0 8 0 anonpl 24 672683 0 654344 170 55 115 133 0 188 0 amapchunkpl 152 52470 0 51721 53 21 32 37 0 158 0 amappl16 200 12244 0 11612 96 61 35 47 0 8 0 amappl15 192 1055 0 1043 1 0 1 1 0 8 0 amappl14 184 516 0 510 1 0 1 1 0 8 0 amappl13 176 141 0 140 1 0 1 1 0 8 0 amappl12 168 20 0 13 1 0 1 1 0 8 0 amappl11 160 118 0 103 1 0 1 1 0 8 0 amappl10 152 264 0 264 2 2 0 1 0 8 0 amappl9 144 1672 0 1666 1 0 1 1 0 8 0 amappl8 136 892 0 817 3 0 3 3 0 8 0 amappl7 128 276 0 256 1 0 1 1 0 8 0 amappl6 120 1432 0 1415 2 1 1 2 0 8 0 amappl5 112 3189 0 3176 1 0 1 1 0 8 0 amappl4 104 1174 0 1143 2 1 1 2 0 8 0 amappl3 96 9114 0 9067 2 0 2 2 0 8 0 amappl2 88 587 0 552 2 1 1 2 0 8 0 amappl1 80 84562 0 83953 19 4 15 19 0 8 0 amappl 88 17567 0 17390 5 0 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 13 0 3 1 0 1 1 0 8 0 uaddrrnd 24 3491 0 3436 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3491 0 3436 1 0 1 1 0 8 0 vmmpekpl 168 27576 0 27510 4 0 4 4 0 8 0 vmmpepl 168 335723 0 333257 183 59 124 146 0 357 1 vmsppl 272 3490 0 3436 6 2 4 4 0 8 0 rwobjpl 24 88193 0 80638 47 0 47 47 0 8 0 pdppl 4096 6988 0 6902 251 157 94 94 0 8 8 pvpl 32 1328145 0 1307821 282 100 182 255 0 265 0 pmappl 216 3490 0 3436 4 0 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1090 0 260 24 0 24 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002801f37a,ffff80002801f48c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002801f360,6908,2e9c,ffff800000c4626c,6908) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002ea059f8,ffff800000c46000) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002ea059f8,ffff800000c46000) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000c46000,1,ffff8000216f1ce0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000c46000,1,ffff8000216f1ce0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807c045b10,82907003,ffff800000c46000,1,fffffd807f7d7270,ffff8000216f1ce0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8068cf7880,82907003,ffff800000c46000,ffff8000216f1ce0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000216f1ce0,ffff80002ea05d48,ffff80002ea05da0) at sys_ioctl+0x49e syscall(ffff80002ea05e10) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d3fd01e40, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002801f37a,ffff80002801f48c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002801f360,6908,2e9c,ffff800000c4626c,6908) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002ea059f8,ffff800000c46000) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002ea059f8,ffff800000c46000) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000c46000,1,ffff8000216f1ce0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000c46000,1,ffff8000216f1ce0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807c045b10,82907003,ffff800000c46000,1,fffffd807f7d7270,ffff8000216f1ce0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8068cf7880,82907003,ffff800000c46000,ffff8000216f1ce0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000216f1ce0,ffff80002ea05d48,ffff80002ea05da0) at sys_ioctl+0x49e syscall(ffff80002ea05e10) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x47d3fd01e40, count: -9