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(ffff80002b49f382,ffff80002b49f494,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002b49f368,ffffeda7,7e96,ffff800000bfba6c,ffffeda7) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e9b30d8,ffff800000bfb800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e9b30d8,ffff800000bfb800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000bfb800,1,ffff800021776548) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000bfb800,1,ffff800021776548) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8068b53ce0,82907003,ffff800000bfb800,1,fffffd807f7d7820,ffff800021776548) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c6f4358,82907003,ffff800000bfb800,ffff800021776548) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021776548,ffff80002e9b3428,ffff80002e9b3480) at sys_ioctl+0x49e syscall(ffff80002e9b34f0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f6094d7da0, count: -9 ddb> show registers rdi 0xffff80002b49f382 rsi 0 rbp 0xffff80002e9b2f60 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x34d9f0583c3b03d3 r11 0x670d0ce267cf8adb r12 0xffff80002b49f494 r13 0 r14 0xffff80002b49f382 r15 0 rip 0xffffffff812128df rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e9b2f00 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.4) pid=90170 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000217767e8,0xffff8000217762b8 process=0xffff80002e916ff0 user=0xffff80002e9ae000, vmspace=0xfffffd8062fc9440 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 1313 40500 6003 0 2 0 syz-executor.3 1313 199198 6003 0 3 0x4000080 fsleep syz-executor.3 76244 474913 82651 0 2 0 syz-executor.4 *76244 90170 82651 0 7 0x4000000 syz-executor.4 69714 222647 35733 0 2 0 syz-executor.7 69714 427490 35733 0 3 0x4000080 fsleep syz-executor.7 57966 391366 38878 0 2 0 syz-executor.0 57966 478284 38878 0 3 0x4000080 fsleep syz-executor.0 57966 222354 38878 0 3 0x4000080 fsleep syz-executor.0 56167 286094 69651 0 2 0x480 syz-executor.5 56167 181947 69651 0 3 0x4000080 fsleep syz-executor.5 84988 437477 81771 0 3 0x82 nanoslp syz-executor.1 34570 330250 0 0 3 0x14200 bored sosplice 49670 29595 0 0 3 0x14280 nfsidl nfsio 47676 85620 0 0 3 0x14280 nfsidl nfsio 82401 110710 0 0 3 0x14280 nfsidl nfsio 10673 33337 0 0 3 0x14280 nfsidl nfsio 51092 489595 0 0 3 0x14280 nfsidl nfsio 5463 458709 0 0 3 0x14280 nfsidl nfsio 4984 446386 0 0 3 0x14280 nfsidl nfsio 83560 410922 0 0 3 0x14280 nfsidl nfsio 86900 518863 0 0 3 0x14280 nfsidl nfsio 56928 499594 0 0 3 0x14280 nfsidl nfsio 32210 202328 0 0 3 0x14280 nfsidl nfsio 97472 162129 0 0 3 0x14280 nfsidl nfsio 6563 21826 0 0 3 0x14280 nfsidl nfsio 84251 423106 0 0 3 0x14280 nfsidl nfsio 43370 170197 0 0 3 0x14280 nfsidl nfsio 59588 172953 0 0 3 0x14280 nfsidl nfsio 72562 78260 0 0 3 0x14280 nfsidl nfsio 14194 354652 0 0 3 0x14280 nfsidl nfsio 13376 412570 0 0 3 0x14280 nfsidl nfsio 95318 413024 0 0 3 0x14280 nfsidl nfsio 58637 494042 81771 0 3 0x82 nanoslp syz-executor.6 35733 229417 81771 0 2 0x482 syz-executor.7 69651 205059 81771 0 3 0x82 nanoslp syz-executor.5 82651 336605 81771 0 3 0x82 nanoslp syz-executor.4 44582 284745 81771 0 2 0x482 syz-executor.2 6003 490332 81771 0 3 0x82 nanoslp syz-executor.3 38878 493728 81771 0 3 0x82 nanoslp syz-executor.0 81771 167542 11120 0 3 0x82 wait syz-fuzzer 81771 294227 11120 0 3 0x4000082 thrsleep syz-fuzzer 81771 238411 11120 0 3 0x4000082 thrsleep syz-fuzzer 81771 86074 11120 0 3 0x4000082 thrsleep syz-fuzzer 81771 379982 11120 0 3 0x4000082 wait syz-fuzzer 81771 67547 11120 0 3 0x4000082 wait syz-fuzzer 81771 60633 11120 0 3 0x4000082 thrsleep syz-fuzzer 81771 101228 11120 0 3 0x4000082 thrsleep syz-fuzzer 81771 429118 11120 0 3 0x4000082 wait syz-fuzzer 81771 280348 11120 0 3 0x4000082 wait syz-fuzzer 81771 328153 11120 0 3 0x4000082 wait syz-fuzzer 81771 365128 11120 0 3 0x4000082 wait syz-fuzzer 81771 212789 11120 0 3 0x4000082 wait syz-fuzzer 81771 189007 11120 0 3 0x4000082 kqread syz-fuzzer 11120 465551 64373 0 3 0x10008a sigsusp ksh 64373 411513 98458 0 3 0x9a kqread sshd 31841 51602 1 0 3 0x100083 ttyin getty 98458 135205 1 0 3 0x88 kqread sshd 34062 126753 51871 73 3 0x1100090 kqread syslogd 51871 92117 1 0 3 0x100082 netio syslogd 7246 496166 1 0 3 0x100080 kqread resolvd 70227 222719 32199 77 3 0x100092 kqread dhcpleased 26871 293115 32199 77 3 0x100092 kqread dhcpleased 32199 512071 1 0 3 0x80 kqread dhcpleased 7397 129573 0 0 3 0x14200 bored smr 50505 443789 0 0 2 0x14200 zerothread 23399 153609 0 0 3 0x14200 aiodoned aiodoned 68577 255401 0 0 3 0x14200 syncer update 68106 109994 0 0 3 0x14200 cleaner cleaner 65750 497668 0 0 3 0x14200 reaper reaper 23754 132448 0 0 3 0x14200 pgdaemon pagedaemon 79193 395366 0 0 3 0x14200 bored viomb 211 301230 0 0 3 0x40014200 acpi0 acpi0 39269 14174 0 0 3 0x14200 bored softnet 10858 302759 0 0 3 0x14200 bored softnet 34852 136549 0 0 3 0x14200 bored softnet 45485 318045 0 0 3 0x14200 bored softnet 57584 3372 0 0 3 0x14200 bored systqmp 45237 198135 0 0 3 0x14200 bored systq 79393 254499 0 0 3 0x40014200 bored softclock 59242 18832 0 0 3 0x40014200 idle0 1 135309 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 10190 6552K 6792K 78643K 11829 0 pcb 13 14K 16K 78643K 165 0 rtable 244 8K 10K 78643K 480 0 ifaddr 92 18K 18K 78643K 209 0 counters 30 17K 17K 78643K 50 0 ioctlops 1 1K 4K 78643K 251 0 iov 0 0K 16K 78643K 66 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1282 80K 80K 78643K 1786 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 80 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 77K 78643K 786 0 proc 58 59K 83K 78643K 549 0 subproc 104 6K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 11 0 in_multi 99 6K 6K 78643K 114 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 667 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 255 212K 213K 78643K 5646 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 34 0 NDP 13 0K 2K 78643K 51 0 temp 91 4708K 4773K 78643K 5708 0 kqueue 13 20K 24K 78643K 73 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 55 0 50 1 0 1 1 0 8 0 rtentry 112 130 0 19 4 0 4 4 0 8 0 unpcb 144 259 0 246 2 0 2 2 0 8 1 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 45 0 45 1 1 0 1 0 8 0 tcpcb 768 247 0 242 8 6 2 7 0 8 0 arp 88 20 0 2 1 0 1 1 0 8 0 inpcb 336 1365 0 1358 18 11 7 12 0 8 6 ip6q 72 3 0 2 1 0 1 1 0 8 0 ip6af 40 5 0 4 1 0 1 1 0 8 0 nd6 48 28 0 4 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 10 0 7 2 1 1 1 0 8 0 pfrktable 1344 33 0 31 2 1 1 1 0 8 0 pfanchor 1280 25 0 3 3 1 2 2 0 8 0 pftag 88 3 0 3 1 1 0 1 0 8 0 pfrule 1360 78 0 75 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 554 0 99 30 0 30 30 0 8 0 art_table 32 555 0 99 4 0 4 4 0 8 0 art_node 16 129 0 29 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 71 0 61 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 2694 0 1259 90 0 90 90 0 8 0 ffsino 240 2694 0 1259 85 0 85 85 0 8 0 nchpl 144 3866 0 2222 63 0 63 63 0 8 0 uvmvnodes 80 2938 0 0 60 0 60 60 0 8 0 vnodes 216 2938 0 0 164 0 164 164 0 8 0 namei 1024 13455 0 13455 2 1 1 2 0 8 1 vcpupl 2048 76 0 0 10 0 10 10 0 8 0 vmpool 536 79 0 3 6 0 6 6 0 8 0 pfiaddrpl 120 12 0 9 2 1 1 1 0 8 0 kstatmem 264 66 0 40 2 0 2 2 0 8 0 scxspl 216 10786 0 10786 9 8 1 8 0 8 1 plimitpl 152 95 0 80 1 0 1 1 0 8 0 sigapl 424 1091 0 1025 8 0 8 8 0 8 0 futexpl 64 7296 0 7291 1 0 1 1 0 8 0 knotepl 120 20119 0 20039 7 3 4 7 0 8 1 kqueuepl 184 105 0 96 1 0 1 1 0 8 0 pipepl 288 286 0 258 7 4 3 7 0 8 0 fdescpl 432 1054 0 1028 4 0 4 4 0 8 0 filepl 120 6974 0 6733 18 6 12 16 0 8 4 lockfpl 104 160 0 158 1 0 1 1 0 8 0 lockfspl 48 42 0 40 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 24 0 8 1 0 1 1 0 8 0 ucredpl 104 1392 0 1378 1 0 1 1 0 8 0 zombiepl 144 1028 0 1025 1 0 1 1 0 8 0 processpl 1000 1091 0 1025 11 2 9 9 0 8 0 procpl 672 2244 0 2159 10 2 8 9 0 8 0 sosppl 168 6 0 6 2 1 1 1 0 8 1 sockpl 456 1679 0 1654 34 23 11 20 0 8 7 mcl64k 65536 50 0 50 2 1 1 1 0 8 1 mcl16k 16384 9 0 9 3 2 1 1 0 8 1 mcl12k 12288 23 0 23 2 1 1 1 0 8 1 mcl9k 9216 10 0 10 3 2 1 1 0 8 1 mcl8k 8192 40 0 40 4 3 1 1 0 8 1 mcl4k 4096 98 0 98 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 70361 0 70299 13 3 10 12 0 8 1 mtagpl 96 32 0 12 2 1 1 1 0 8 0 mbufpl 256 116109 0 115845 24 4 20 22 0 8 0 bufpl 288 4668 0 132 324 0 324 324 0 8 0 anonpl 24 201157 0 184906 131 12 119 120 0 188 8 amapchunkpl 152 15649 0 15038 39 13 26 36 0 158 0 amappl16 200 3743 0 3097 55 11 44 47 0 8 8 amappl15 192 176 0 166 1 0 1 1 0 8 0 amappl14 184 5 0 0 1 0 1 1 0 8 0 amappl13 176 160 0 157 1 0 1 1 0 8 0 amappl12 168 88 0 83 1 0 1 1 0 8 0 amappl11 160 80 0 66 1 0 1 1 0 8 0 amappl10 152 96 0 93 1 0 1 1 0 8 0 amappl9 144 562 0 559 1 0 1 1 0 8 0 amappl8 136 871 0 809 3 0 3 3 0 8 0 amappl7 128 418 0 401 1 0 1 1 0 8 0 amappl6 120 268 0 256 2 1 1 2 0 8 0 amappl5 112 747 0 732 1 0 1 1 0 8 0 amappl4 104 826 0 800 2 1 1 2 0 8 0 amappl3 96 2554 0 2501 2 0 2 2 0 8 0 amappl2 88 617 0 579 2 1 1 2 0 8 0 amappl1 80 27178 0 26549 19 4 15 19 0 8 0 amappl 88 5145 0 4989 4 0 4 4 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 1133 0 1031 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1133 0 1031 1 0 1 1 0 8 0 vmmpekpl 168 12440 0 12388 3 0 3 3 0 8 0 vmmpepl 168 106569 0 103989 143 11 132 132 0 357 13 vmsppl 272 1132 0 1031 8 1 7 7 0 8 0 rwobjpl 24 30211 0 25660 29 0 29 29 0 8 0 pdppl 4096 2272 0 2138 206 66 140 140 0 8 6 pvpl 32 478043 0 459103 239 41 198 239 0 265 31 pmappl 216 1132 0 1031 6 0 6 6 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 838 0 100 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002b49f382,ffff80002b49f494,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002b49f368,ffffeda7,7e96,ffff800000bfba6c,ffffeda7) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e9b30d8,ffff800000bfb800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e9b30d8,ffff800000bfb800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000bfb800,1,ffff800021776548) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000bfb800,1,ffff800021776548) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8068b53ce0,82907003,ffff800000bfb800,1,fffffd807f7d7820,ffff800021776548) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c6f4358,82907003,ffff800000bfb800,ffff800021776548) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021776548,ffff80002e9b3428,ffff80002e9b3480) at sys_ioctl+0x49e syscall(ffff80002e9b34f0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f6094d7da0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002b49f382,ffff80002b49f494,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002b49f368,ffffeda7,7e96,ffff800000bfba6c,ffffeda7) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e9b30d8,ffff800000bfb800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e9b30d8,ffff800000bfb800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000bfb800,1,ffff800021776548) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000bfb800,1,ffff800021776548) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8068b53ce0,82907003,ffff800000bfb800,1,fffffd807f7d7820,ffff800021776548) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c6f4358,82907003,ffff800000bfb800,ffff800021776548) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021776548,ffff80002e9b3428,ffff80002e9b3480) at sys_ioctl+0x49e syscall(ffff80002e9b34f0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8f6094d7da0, count: -9