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(ffff80002802f052,ffff80002802f164,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002802f038,ffffe707,5783,ffff800000c60a80,0) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e97ade8,ffff800000c60800) at pipex_init_session+0x62c pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002e97ade8,ffff800000c60800) at pipex_init_session+0x62c sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000c60800,1,ffff80002172c548) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c60800,1,ffff80002172c548) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806464b2a0,82907003,ffff800000c60800,1,fffffd807f7d78f0,ffff80002172c548) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80681f73d8,82907003,ffff800000c60800,ffff80002172c548) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002172c548,ffff80002e97b138,ffff80002e97b190) at sys_ioctl+0x49e syscall(ffff80002e97b200) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b7e7a0720, count: -9 ddb> show registers rdi 0xffff80002b4e6000 rsi 0 rbp 0xffff80002e97ac70 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x10fba10e6834ebaa r11 0xa8c3a44ebeff731c r12 0xffff80002802f164 r13 0 r14 0xffff80002802f052 r15 0 rip 0xffffffff8172258f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e97ac10 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.6) pid=186429 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002172c7e8,0xffffffff82a54f90 process=0xffff80002b4d2fe8 user=0xffff80002e976000, vmspace=0xfffffd806c5a5560 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 90680 496762 85632 0 3 0x80 fsleep syz-executor.6 *90680 186429 85632 0 7 0x4000000 syz-executor.6 67342 227815 17249 0 3 0x80 fsleep syz-executor.5 67342 316918 17249 0 3 0x4000080 lockf syz-executor.5 6541 429380 59756 0 3 0x82 piperd syz-executor.4 20592 134285 59756 0 2 0x482 syz-executor.7 17249 1608 59756 0 3 0x82 nanoslp syz-executor.5 64102 462961 0 0 3 0x14280 nfsidl nfsio 44961 504967 0 0 3 0x14280 nfsidl nfsio 96908 309319 0 0 3 0x14280 nfsidl nfsio 97694 437362 0 0 3 0x14280 nfsidl nfsio 70745 445825 0 0 3 0x14280 nfsidl nfsio 59439 196040 0 0 3 0x14280 nfsidl nfsio 54515 240391 0 0 3 0x14280 nfsidl nfsio 603 488368 0 0 3 0x14280 nfsidl nfsio 24141 11615 0 0 3 0x14280 nfsidl nfsio 56541 45145 0 0 3 0x14280 nfsidl nfsio 62122 340317 0 0 3 0x14280 nfsidl nfsio 65363 379660 0 0 3 0x14280 nfsidl nfsio 43733 199984 0 0 3 0x14280 nfsidl nfsio 4758 239770 0 0 3 0x14280 nfsidl nfsio 17310 35578 0 0 3 0x14280 nfsidl nfsio 55356 325715 0 0 3 0x14280 nfsidl nfsio 44704 362090 0 0 3 0x14280 nfsidl nfsio 93825 151078 0 0 3 0x14280 nfsidl nfsio 5993 478860 0 0 3 0x14280 nfsidl nfsio 80193 431697 0 0 3 0x14280 nfsidl nfsio 56217 476395 59756 0 2 0x482 syz-executor.3 71827 171231 0 0 3 0x14200 bored sosplice 85632 76879 59756 0 2 0x482 syz-executor.6 32676 468277 59756 0 2 0x482 syz-executor.2 13800 418656 59756 0 2 0x2 syz-executor.0 3626 200137 59756 0 3 0x82 piperd syz-executor.1 59756 195331 59791 0 3 0x82 thrsleep syz-fuzzer 59756 106421 59791 0 2 0x4000482 syz-fuzzer 59756 142877 59791 0 3 0x4000082 wait syz-fuzzer 59756 366157 59791 0 3 0x4000082 thrsleep syz-fuzzer 59756 256135 59791 0 3 0x4000082 wait syz-fuzzer 59756 388424 59791 0 3 0x4000082 thrsleep syz-fuzzer 59756 248235 59791 0 3 0x4000082 wait syz-fuzzer 59756 41989 59791 0 3 0x4000082 thrsleep syz-fuzzer 59756 315996 59791 0 3 0x4000082 wait syz-fuzzer 59756 216174 59791 0 3 0x4000082 wait syz-fuzzer 59756 114481 59791 0 3 0x4000082 wait syz-fuzzer 59756 185972 59791 0 3 0x4000082 kqread syz-fuzzer 59756 260522 59791 0 3 0x4000082 wait syz-fuzzer 59756 174893 59791 0 3 0x4000082 wait syz-fuzzer 59791 338395 94482 0 3 0x10008a sigsusp ksh 94482 369366 46746 0 3 0x9a kqread sshd 27926 307445 1 0 3 0x100083 ttyin getty 46746 377589 1 0 3 0x88 kqread sshd 84726 184703 5951 73 3 0x1100090 kqread syslogd 5951 413475 1 0 3 0x100082 netio syslogd 82095 256686 1 0 3 0x100080 kqread resolvd 82080 37051 59738 77 3 0x100092 kqread dhcpleased 87912 240148 59738 77 3 0x100092 kqread dhcpleased 59738 20835 1 0 3 0x80 kqread dhcpleased 66095 369308 0 0 3 0x14200 bored smr 98829 434166 0 0 2 0x14200 zerothread 81857 402686 0 0 3 0x14200 aiodoned aiodoned 89908 10024 0 0 3 0x14200 syncer update 49327 295155 0 0 3 0x14200 cleaner cleaner 99885 395350 0 0 3 0x14200 reaper reaper 17210 139559 0 0 3 0x14200 pgdaemon pagedaemon 14856 389696 0 0 3 0x14200 bored viomb 68898 475554 0 0 3 0x40014200 acpi0 acpi0 40344 92327 0 0 3 0x14200 bored softnet 94144 476224 0 0 3 0x14200 bored softnet 76740 125710 0 0 3 0x14200 bored softnet 21915 444113 0 0 3 0x14200 bored softnet 23225 105155 0 0 3 0x14200 bored systqmp 29405 108563 0 0 3 0x14200 bored systq 42682 305518 0 0 3 0x40014200 bored softclock 15744 105759 0 0 3 0x40014200 idle0 1 181502 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 10181 6411K 7701K 78643K 13185 0 pcb 14 14K 16K 78643K 460 0 rtable 132 16K 18K 78643K 836 0 ifaddr 84 16K 18K 78643K 394 0 sysctl 2 0K 0K 78643K 2 0 counters 28 17K 17K 78643K 67 0 ioctlops 1 1K 4K 78643K 558 0 iov 0 0K 16K 78643K 118 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1334 83K 83K 78643K 2241 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 0K 0K 78643K 2 0 sem 10 1K 1K 78643K 14 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 73K 78643K 1681 0 sigio 0 0K 0K 78643K 68 0 proc 59 59K 83K 78643K 839 0 subproc 104 6K 6K 78643K 247 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 308 0 in_multi 45 3K 6K 78643K 252 0 ether_multi 1 0K 0K 78643K 4 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 1064 0 pfkey data 0 0K 0K 78643K 11 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 258 229K 230K 78643K 11285 0 UVM aobj 25 2K 2K 78643K 28 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 32 0 NDP 13 0K 2K 78643K 89 0 temp 130 4718K 5734K 78643K 14850 0 kqueue 12 18K 26K 78643K 143 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 97 0 94 1 0 1 1 0 8 0 rtentry 112 244 0 199 4 0 4 4 0 8 0 unpcb 144 1195 0 1182 14 13 1 4 0 8 0 syncache 296 10 0 10 2 2 0 1 0 8 0 tcpqe 32 76 0 76 1 1 0 1 0 8 0 tcpcb 768 632 0 560 39 31 8 8 0 8 0 arp 88 40 0 32 1 0 1 1 0 8 0 inpcb 336 3017 0 3007 50 43 7 13 0 8 6 nd6 48 61 0 52 1 0 1 1 0 8 0 pkpcb 40 119 0 119 4 4 0 1 0 8 0 kcovpl 48 19 0 11 1 0 1 1 0 8 0 ppxss 1160 14 0 12 4 3 1 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pfrktable 1344 24 0 16 1 0 1 1 0 8 0 pfanchor 1280 15 0 0 2 0 2 2 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstkey 120 8 0 8 1 1 0 1 0 8 0 pfstate 336 4 0 4 1 1 0 1 0 8 0 pfrule 1360 96 0 84 4 3 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1083 0 854 31 13 18 30 0 8 0 art_table 32 1084 0 854 4 1 3 4 0 8 0 art_node 16 243 0 205 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 4 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 11 0 3 1 0 1 1 0 8 0 shmpl 112 25 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3470 0 2035 90 0 90 90 0 8 0 ffsino 240 3470 0 2035 85 0 85 85 0 8 0 nchpl 144 5670 0 4032 63 1 62 63 0 8 0 uvmvnodes 80 4271 0 0 88 0 88 88 0 8 0 vnodes 216 4271 0 0 238 0 238 238 0 8 0 namei 1024 20566 0 20565 3 2 1 2 0 8 0 vcpupl 2048 11 0 0 2 0 2 2 0 8 0 vmpool 536 19 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 18 0 9 1 0 1 1 0 8 0 kstatmem 264 98 0 72 2 0 2 2 0 8 0 scxspl 216 15753 0 15753 11 10 1 8 0 8 1 plimitpl 152 188 0 174 1 0 1 1 0 8 0 sigapl 424 1970 0 1907 8 0 8 8 0 8 0 futexpl 64 14403 0 14401 1 0 1 1 0 8 0 knotepl 120 22031 0 21951 21 16 5 8 0 8 0 kqueuepl 184 327 0 319 4 3 1 4 0 8 0 pipepl 288 569 0 541 14 11 3 6 0 8 0 fdescpl 432 1933 0 1910 4 0 4 4 0 8 0 filepl 120 13788 0 13548 28 18 10 15 0 8 2 lockfpl 104 612 0 607 2 1 1 2 0 8 0 lockfspl 48 188 0 185 1 0 1 1 0 8 0 sessionpl 144 34 0 18 1 0 1 1 0 8 0 pgrppl 48 37 0 21 1 0 1 1 0 8 0 ucredpl 104 1468 0 1456 1 0 1 1 0 8 0 zombiepl 144 1910 0 1907 1 0 1 1 0 8 0 processpl 1000 1970 0 1907 10 1 9 9 0 8 0 procpl 672 5436 0 5358 15 7 8 9 0 8 0 sosppl 168 3 0 3 1 1 0 1 0 8 0 sockpl 456 4570 0 4544 85 73 12 21 0 8 7 mcl64k 65536 54 0 54 7 7 0 1 0 8 0 mcl16k 16384 15 0 15 6 6 0 1 0 8 0 mcl12k 12288 42 0 42 9 8 1 1 0 8 1 mcl9k 9216 21 0 21 7 6 1 1 0 8 1 mcl8k 8192 81 0 81 7 6 1 1 0 8 1 mcl4k 4096 167 0 167 2 1 1 1 0 8 1 mcl2k2 2112 13 0 13 7 7 0 1 0 8 0 mcl2k 2048 73587 0 73526 19 10 9 17 0 8 0 mtagpl 96 75 0 58 2 1 1 1 0 8 0 mbufpl 256 126595 0 126420 24 8 16 23 0 8 0 bufpl 288 5660 0 138 395 0 395 395 0 8 0 anonpl 24 364318 0 349150 126 22 104 117 0 188 0 amapchunkpl 152 31559 0 30962 47 20 27 38 0 158 1 amappl16 200 4545 0 3941 47 14 33 42 0 8 0 amappl15 192 883 0 877 1 0 1 1 0 8 0 amappl14 184 537 0 527 1 0 1 1 0 8 0 amappl13 176 396 0 394 1 0 1 1 0 8 0 amappl12 168 23 0 19 1 0 1 1 0 8 0 amappl11 160 111 0 96 1 0 1 1 0 8 0 amappl10 152 13 0 12 1 0 1 1 0 8 0 amappl9 144 661 0 656 1 0 1 1 0 8 0 amappl8 136 953 0 887 3 0 3 3 0 8 0 amappl7 128 353 0 334 1 0 1 1 0 8 0 amappl6 120 430 0 415 2 1 1 2 0 8 0 amappl5 112 1017 0 1006 1 0 1 1 0 8 0 amappl4 104 1599 0 1568 2 1 1 2 0 8 0 amappl3 96 5181 0 5140 3 1 2 2 0 8 0 amappl2 88 806 0 771 2 1 1 2 0 8 0 amappl1 80 49785 0 49216 22 7 15 20 0 8 0 amappl 88 10599 0 10448 8 3 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 27 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1952 0 1918 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1952 0 1918 1 0 1 1 0 8 0 vmmpekpl 168 20763 0 20708 3 0 3 3 0 8 0 vmmpepl 168 197095 0 194858 180 59 121 137 0 357 7 vmsppl 272 1951 0 1918 5 2 3 3 0 8 0 rwobjpl 24 53032 0 47205 36 0 36 36 0 8 0 pdppl 4096 3910 0 3847 320 245 75 75 0 8 12 pvpl 32 809530 0 790407 247 75 172 239 0 265 0 pmappl 216 1951 0 1918 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1072 0 360 21 0 21 21 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002802f052,ffff80002802f164,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002802f038,ffffe707,5783,ffff800000c60a80,0) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e97ade8,ffff800000c60800) at pipex_init_session+0x62c pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002e97ade8,ffff800000c60800) at pipex_init_session+0x62c sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000c60800,1,ffff80002172c548) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c60800,1,ffff80002172c548) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806464b2a0,82907003,ffff800000c60800,1,fffffd807f7d78f0,ffff80002172c548) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80681f73d8,82907003,ffff800000c60800,ffff80002172c548) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002172c548,ffff80002e97b138,ffff80002e97b190) at sys_ioctl+0x49e syscall(ffff80002e97b200) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b7e7a0720, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002802f052,ffff80002802f164,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002802f038,ffffe707,5783,ffff800000c60a80,0) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e97ade8,ffff800000c60800) at pipex_init_session+0x62c pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002e97ade8,ffff800000c60800) at pipex_init_session+0x62c sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000c60800,1,ffff80002172c548) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c60800,1,ffff80002172c548) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806464b2a0,82907003,ffff800000c60800,1,fffffd807f7d78f0,ffff80002172c548) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80681f73d8,82907003,ffff800000c60800,ffff80002172c548) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002172c548,ffff80002e97b138,ffff80002e97b190) at sys_ioctl+0x49e syscall(ffff80002e97b200) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3b7e7a0720, count: -9