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(ffff800028e7aefa,ffff800028e7b00c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800028e7aee0,ffff9b53,1391,ffff800000d2fe6c,ffff9b53) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e8ceb58,ffff800000d2fc00) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e8ceb58,ffff800000d2fc00) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d2fc00,1,ffff8000231daa88) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d2fc00,1,ffff8000231daa88) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80685095e8,82907003,ffff800000d2fc00,1,fffffd807f7d77b8,ffff8000231daa88) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80667c18e8,82907003,ffff800000d2fc00,ffff8000231daa88) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000231daa88,ffff80002e8ceea8,ffff80002e8cef00) at sys_ioctl+0x49e syscall(ffff80002e8cef70) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf283e5f8f0, count: -9 ddb> show registers rdi 0xffff8000231e8000 rsi 0 rbp 0xffff80002e8ce9e0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x70986222feb90abe r11 0xaba4be523afa4241 r12 0xffff800028e7b00c r13 0 r14 0xffff800028e7aefa r15 0 rip 0xffffffff82395bdf rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e8ce980 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.1) pid=367002 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000231dad28,0xffffffff829b1c28 process=0xffff800026646418 user=0xffff80002e8ca000, vmspace=0xfffffd806289c778 estcpu=3, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 81906 435877 24683 0 2 0 syz-executor.1 *81906 367002 24683 0 7 0x4000000 syz-executor.1 24683 215204 57781 0 3 0x82 nanoslp syz-executor.1 10765 473155 57781 0 3 0x82 piperd syz-executor.7 89099 414779 57781 0 3 0x82 piperd syz-executor.0 71218 450914 57781 0 3 0x82 piperd syz-executor.5 94015 133144 57781 0 3 0x82 piperd syz-executor.2 96081 9479 57781 0 3 0x82 piperd syz-executor.3 90956 272859 57781 0 3 0x82 piperd syz-executor.6 29603 244327 1 0 3 0x100083 ttyin getty 12475 147652 57781 0 3 0x82 piperd syz-executor.4 90928 329775 0 0 3 0x14280 nfsidl nfsio 8189 472998 0 0 3 0x14280 nfsidl nfsio 68097 248909 0 0 3 0x14280 nfsidl nfsio 17856 287210 0 0 3 0x14280 nfsidl nfsio 18256 167218 0 0 3 0x14280 nfsidl nfsio 7738 330934 0 0 3 0x14280 nfsidl nfsio 41251 23758 0 0 3 0x14280 nfsidl nfsio 24430 376477 0 0 3 0x14280 nfsidl nfsio 2362 197827 0 0 3 0x14280 nfsidl nfsio 84663 322641 0 0 3 0x14280 nfsidl nfsio 74734 256366 0 0 3 0x14280 nfsidl nfsio 56111 508742 0 0 3 0x14280 nfsidl nfsio 4199 225246 0 0 3 0x14280 nfsidl nfsio 96357 175167 0 0 3 0x14280 nfsidl nfsio 26691 422673 0 0 3 0x14280 nfsidl nfsio 90502 79691 0 0 3 0x14280 nfsidl nfsio 49881 146434 0 0 3 0x14280 nfsidl nfsio 16678 507199 0 0 3 0x14280 nfsidl nfsio 57804 188717 0 0 3 0x14280 nfsidl nfsio 83253 430559 0 0 3 0x14280 nfsidl nfsio 69285 314735 0 0 3 0x14200 bored sosplice 57781 132704 73524 0 3 0x82 wait syz-fuzzer 57781 358539 73524 0 3 0x4000082 thrsleep syz-fuzzer 57781 194121 73524 0 3 0x4000082 thrsleep syz-fuzzer 57781 436922 73524 0 3 0x4000082 wait syz-fuzzer 57781 348018 73524 0 3 0x4000082 wait syz-fuzzer 57781 327759 73524 0 3 0x4000082 thrsleep syz-fuzzer 57781 286842 73524 0 3 0x4000082 wait syz-fuzzer 57781 461009 73524 0 3 0x4000082 kqread syz-fuzzer 57781 12390 73524 0 3 0x4000082 thrsleep syz-fuzzer 57781 6666 73524 0 3 0x4000082 thrsleep syz-fuzzer 57781 360262 73524 0 3 0x4000082 wait syz-fuzzer 57781 21349 73524 0 3 0x4000082 wait syz-fuzzer 57781 265143 73524 0 3 0x4000082 wait syz-fuzzer 57781 401416 73524 0 3 0x4000082 wait syz-fuzzer 73524 227036 7686 0 3 0x10008a sigsusp ksh 7686 500913 51628 0 3 0x9a kqread sshd 51628 253157 1 0 3 0x88 kqread sshd 30101 40086 2120 73 3 0x1100090 kqread syslogd 2120 398907 1 0 3 0x100082 netio syslogd 30343 128048 1 0 3 0x100080 kqread resolvd 50705 515729 74797 77 3 0x100092 kqread dhcpleased 66999 288968 74797 77 3 0x100092 kqread dhcpleased 74797 6652 1 0 3 0x80 kqread dhcpleased 4937 185289 0 0 3 0x14200 bored smr 69619 301348 0 0 2 0x14200 zerothread 56124 20835 0 0 3 0x14200 aiodoned aiodoned 9556 165010 0 0 3 0x14200 syncer update 40030 88473 0 0 3 0x14200 cleaner cleaner 36450 392386 0 0 3 0x14200 reaper reaper 69822 405991 0 0 3 0x14200 pgdaemon pagedaemon 3052 269596 0 0 3 0x14200 bored viomb 98282 921 0 0 3 0x40014200 acpi0 acpi0 22738 345400 0 0 3 0x14200 bored softnet 91751 362547 0 0 3 0x14200 bored softnet 35141 33521 0 0 3 0x14200 bored softnet 45085 274355 0 0 3 0x14200 bored softnet 11177 56472 0 0 3 0x14200 bored systqmp 81402 143265 0 0 3 0x14200 bored systq 28147 412416 0 0 3 0x40014200 bored softclock 21012 208191 0 0 3 0x40014200 idle0 1 103198 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 10223 6442K 8014K 78643K 28078 0 pcb 13 20K 25K 78643K 1114 0 rtable 231 18K 18K 78643K 2319 0 ifaddr 114 22K 22K 78643K 686 0 sysctl 2 0K 0K 78643K 2 0 counters 29 17K 17K 78643K 160 0 ioctlops 1 1K 4K 78643K 2071 0 iov 0 0K 32K 78643K 1017 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1500 94K 94K 78643K 6640 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 47 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 1568 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 11 37K 73K 78643K 7615 0 sigio 0 0K 0K 78643K 59 0 proc 60 59K 75K 78643K 1711 0 subproc 104 6K 6K 78643K 513 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 221 0 in_multi 92 6K 6K 78643K 581 0 ether_multi 1 0K 0K 78643K 29 0 mrt 1 0K 0K 78643K 31 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 2422 0 pfkey data 0 0K 0K 78643K 5 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 382 620K 622K 78643K 43106 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 657 0 NDP 20 0K 2K 78643K 200 0 temp 154 4719K 5358K 78643K 87073 0 kqueue 12 18K 26K 78643K 998 0 SYN cache 2 20K 28K 78643K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 763 0 760 10 7 3 3 0 8 2 rtentry 112 554 0 461 5 2 3 4 0 8 0 unpcb 144 4668 0 4655 42 41 1 10 0 8 0 syncache 296 57 0 57 9 9 0 1 0 8 0 tcpqe 32 415 229 415 1 1 0 1 0 8 0 tcpcb 768 3118 0 3106 109 106 3 21 0 8 1 arp 88 83 0 67 1 0 1 1 0 8 0 ipq 40 12 0 10 6 5 1 1 0 8 0 ipqe 40 38 0 36 6 5 1 1 0 8 0 inpcb 336 8604 0 8589 112 107 5 18 0 8 3 nd6 48 133 0 112 1 0 1 1 0 8 0 pkpcb 40 26 0 26 6 6 0 1 0 8 0 kcovpl 48 39 0 31 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 86 0 84 12 11 1 1 0 8 0 pfstscr 40 9 0 8 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 pfrke_plain 168 38 0 38 1 1 0 1 0 8 0 pfrktable 1344 186 0 183 1 0 1 1 0 8 0 pfanchor 1280 89 0 56 3 0 3 3 0 8 0 pftag 88 13 0 9 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 120 18 0 16 1 0 1 1 0 8 0 pfstate 336 9 0 8 1 0 1 1 0 8 0 pfrule 1360 95 0 79 4 2 2 2 0 8 0 rttmr 136 10 0 10 3 3 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 2571 0 2146 50 23 27 29 0 8 0 art_table 32 2573 0 2147 5 1 4 4 0 8 0 art_node 16 549 0 468 1 0 1 1 0 8 0 sysvmsgpl 40 121 0 81 1 0 1 1 0 8 0 semapl 112 1566 0 1556 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 11674 0 10207 92 0 92 92 0 8 0 ffsino 240 11674 0 10207 87 0 87 87 0 8 0 nchpl 144 21984 0 20358 63 1 62 63 0 8 0 rtmask 32 78 0 78 2 2 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 88100 0 88100 3 2 1 2 0 8 1 vcpupl 2048 106 0 0 14 0 14 14 0 8 0 vmpool 536 122 0 16 8 0 8 8 0 8 0 pfiaddrpl 120 85 0 82 1 0 1 1 0 8 0 kstatmem 264 224 0 188 6 3 3 3 0 8 0 scsiplug 72 10 0 10 2 2 0 1 0 8 0 scxspl 216 59079 0 59079 18 17 1 8 0 8 1 plimitpl 152 1231 0 1217 1 0 1 1 0 8 0 sigapl 424 7868 0 7809 8 0 8 8 0 8 0 futexpl 64 81819 0 81819 1 0 1 1 0 8 1 knotepl 120 146149 0 146069 73 66 7 11 0 8 2 kqueuepl 184 2066 0 2058 25 24 1 4 0 8 0 pipepl 288 1539 0 1511 36 33 3 7 0 8 0 fdescpl 432 7831 0 7809 4 0 4 4 0 8 0 filepl 120 60438 0 60203 86 76 10 17 0 8 1 lockfpl 104 4043 0 4041 10 8 2 3 0 8 1 lockfspl 48 1566 0 1564 2 1 1 2 0 8 0 sessionpl 144 58 0 42 1 0 1 1 0 8 0 pgrppl 48 116 0 100 1 0 1 1 0 8 0 ucredpl 104 7352 0 7342 1 0 1 1 0 8 0 zombiepl 144 7809 0 7809 2 1 1 1 0 8 1 processpl 1000 7868 0 7809 10 1 9 9 0 8 0 procpl 672 19904 0 19831 23 15 8 10 0 8 0 sosppl 168 70 0 69 6 5 1 1 0 8 0 sockpl 456 14069 0 14038 281 268 13 37 0 8 8 mcl64k 65536 428 0 428 17 16 1 1 0 8 1 mcl16k 16384 97 0 97 20 19 1 1 0 8 1 mcl12k 12288 280 0 280 15 14 1 1 0 8 1 mcl9k 9216 81 0 81 21 20 1 1 0 8 1 mcl8k 8192 381 0 381 12 11 1 1 0 8 1 mcl4k 4096 922 0 922 11 10 1 3 0 8 1 mcl2k2 2112 62 0 62 19 18 1 1 0 8 1 mcl2k 2048 85941 0 85854 28 15 13 16 0 8 0 mtagpl 96 1287 0 941 21 12 9 12 0 8 0 mbufpl 256 201959 0 201382 856 816 40 545 0 8 0 bufpl 288 15320 0 8916 458 0 458 458 0 8 0 anonpl 24 1575812 0 1560329 217 78 139 142 0 188 7 amapchunkpl 152 131182 0 130583 104 74 30 43 0 158 0 amappl16 200 26714 0 25944 156 102 54 56 0 8 9 amappl15 192 1087 0 1078 1 0 1 1 0 8 0 amappl14 184 484 0 478 1 0 1 1 0 8 0 amappl13 176 1086 0 1085 1 0 1 1 0 8 0 amappl12 168 841 0 838 1 0 1 1 0 8 0 amappl11 160 976 0 961 1 0 1 1 0 8 0 amappl10 152 1558 0 1552 1 0 1 1 0 8 0 amappl9 144 1564 0 1558 1 0 1 1 0 8 0 amappl8 136 2287 0 2178 4 0 4 4 0 8 0 amappl7 128 1275 0 1253 1 0 1 1 0 8 0 amappl6 120 1464 0 1446 2 1 1 2 0 8 0 amappl5 112 7968 0 7958 1 0 1 1 0 8 0 amappl4 104 2769 0 2735 2 1 1 2 0 8 0 amappl3 96 23012 0 22968 2 0 2 2 0 8 0 amappl2 88 2067 0 2028 2 0 2 2 0 8 0 amappl1 80 191599 0 191063 19 4 15 19 0 8 0 amappl 88 41879 0 41690 6 0 6 6 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 7953 0 7825 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7953 0 7825 1 0 1 1 0 8 0 vmmpekpl 168 57636 0 57561 5 1 4 4 0 8 0 vmmpepl 168 777012 0 774424 293 142 151 175 0 357 4 vmsppl 272 7952 0 7825 11 2 9 9 0 8 0 rwobjpl 24 193606 0 185795 52 2 50 50 0 8 0 pdppl 4096 15912 0 15756 573 409 164 170 0 8 8 pvpl 32 3001389 0 2984099 415 209 206 234 0 265 12 pmappl 216 7952 0 7825 8 0 8 8 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2394 0 1468 45 17 28 37 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff800028e7aefa,ffff800028e7b00c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800028e7aee0,ffff9b53,1391,ffff800000d2fe6c,ffff9b53) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e8ceb58,ffff800000d2fc00) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e8ceb58,ffff800000d2fc00) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d2fc00,1,ffff8000231daa88) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d2fc00,1,ffff8000231daa88) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80685095e8,82907003,ffff800000d2fc00,1,fffffd807f7d77b8,ffff8000231daa88) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80667c18e8,82907003,ffff800000d2fc00,ffff8000231daa88) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000231daa88,ffff80002e8ceea8,ffff80002e8cef00) at sys_ioctl+0x49e syscall(ffff80002e8cef70) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf283e5f8f0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff800028e7aefa,ffff800028e7b00c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800028e7aee0,ffff9b53,1391,ffff800000d2fe6c,ffff9b53) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e8ceb58,ffff800000d2fc00) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e8ceb58,ffff800000d2fc00) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d2fc00,1,ffff8000231daa88) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d2fc00,1,ffff8000231daa88) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80685095e8,82907003,ffff800000d2fc00,1,fffffd807f7d77b8,ffff8000231daa88) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd80667c18e8,82907003,ffff800000d2fc00,ffff8000231daa88) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000231daa88,ffff80002e8ceea8,ffff80002e8cef00) at sys_ioctl+0x49e syscall(ffff80002e8cef70) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbf283e5f8f0, count: -9