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(ffff800024e13392,ffff800024e134a4,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800024e13378,3f92,7514,ffff800000df6a6c,3f92) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002cceb338,ffff800000df6800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002cceb338,ffff800000df6800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000df6800,1,ffff800022bc4550) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000df6800,1,ffff800022bc4550) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806a623008,82907003,ffff800000df6800,1,fffffd807f7d7750,ffff800022bc4550) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8074ac4ca8,82907003,ffff800000df6800,ffff800022bc4550) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800022bc4550,ffff80002cceb688,ffff80002cceb6e0) at sys_ioctl+0x49e syscall(ffff80002cceb750) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60a772118c0, count: -9 ddb> show registers rdi 0xffff80002b498000 rsi 0 rbp 0xffff80002cceb1c0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x842fef25f84b218e r11 0xe5bad129bf173e7f r12 0xffff800024e134a4 r13 0 r14 0xffff800024e13392 r15 0 rip 0xffffffff81455f0f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002cceb160 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.2) pid=365055 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800022bc57b0,0xffff8000217857b8 process=0xffff8000217113d8 user=0xffff80002cce6000, vmspace=0xfffffd80768ab998 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 35453 349048 3620 0 2 0 syz-executor.1 35453 189431 3620 0 3 0x4000080 fsleep syz-executor.1 70641 22064 73169 0 2 0 syz-executor.2 *70641 365055 73169 0 7 0x4000000 syz-executor.2 43721 72253 43376 0 2 0 syz-executor.3 43721 479703 43376 0 3 0x4000080 fsleep syz-executor.3 18451 457747 63425 0 2 0 syz-executor.0 18451 488087 63425 0 3 0x4000080 fsleep syz-executor.0 43374 197410 40437 0 2 0 syz-executor.5 43374 407140 40437 0 3 0x4000080 fsleep syz-executor.5 43374 54563 40437 0 3 0x4000080 fsleep syz-executor.5 84466 352438 53063 0 3 0x80 nanoslp syz-executor.7 84466 398455 53063 0 3 0x4000080 fsleep syz-executor.7 62307 473570 88269 0 3 0x82 nanoslp syz-executor.6 43376 244132 88269 0 3 0x82 nanoslp syz-executor.3 40437 276087 88269 0 3 0x82 nanoslp syz-executor.5 3620 149975 88269 0 3 0x82 nanoslp syz-executor.1 53063 175674 88269 0 3 0x82 nanoslp syz-executor.7 74312 485260 0 0 3 0x14200 acct acct 94423 240737 88269 0 3 0x82 nanoslp syz-executor.4 73169 380698 88269 0 3 0x82 nanoslp syz-executor.2 63425 231358 88269 0 3 0x82 nanoslp syz-executor.0 58060 484408 1 0 3 0x100083 ttyin getty 56655 460795 0 0 3 0x14200 bored sosplice 88269 59063 53033 0 3 0x82 thrsleep syz-fuzzer 88269 390767 53033 0 3 0x4000082 thrsleep syz-fuzzer 88269 456070 53033 0 3 0x4000082 wait syz-fuzzer 88269 99481 53033 0 3 0x4000082 thrsleep syz-fuzzer 88269 139247 53033 0 3 0x4000082 wait syz-fuzzer 88269 488261 53033 0 3 0x4000082 wait syz-fuzzer 88269 89282 53033 0 3 0x4000082 thrsleep syz-fuzzer 88269 286176 53033 0 3 0x4000082 thrsleep syz-fuzzer 88269 153804 53033 0 3 0x4000082 kqread syz-fuzzer 88269 514182 53033 0 3 0x4000082 wait syz-fuzzer 88269 155689 53033 0 3 0x4000082 wait syz-fuzzer 88269 305795 53033 0 3 0x4000082 wait syz-fuzzer 88269 341988 53033 0 3 0x4000082 wait syz-fuzzer 88269 90279 53033 0 3 0x4000082 wait syz-fuzzer 88269 345185 53033 0 3 0x4000082 thrsleep syz-fuzzer 53033 252412 12908 0 3 0x10008a sigsusp ksh 12908 32401 84509 0 3 0x9a kqread sshd 84509 186867 1 0 3 0x88 kqread sshd 39092 454936 75995 73 3 0x1100090 kqread syslogd 75995 146673 1 0 3 0x100082 netio syslogd 22000 150863 1 0 3 0x100080 kqread resolvd 9256 387960 0 0 3 0x14200 bored smr 80024 128802 0 0 2 0x14200 zerothread 16256 486533 0 0 3 0x14200 aiodoned aiodoned 91654 144375 0 0 3 0x14200 syncer update 5964 162624 0 0 3 0x14200 cleaner cleaner 35954 131699 0 0 3 0x14200 reaper reaper 14224 62233 0 0 3 0x14200 pgdaemon pagedaemon 76125 305769 0 0 3 0x14200 bored viomb 16830 200659 0 0 3 0x40014200 acpi0 acpi0 29679 207859 0 0 3 0x14200 bored softnet 77992 337172 0 0 3 0x14200 bored softnet 29039 78180 0 0 3 0x14200 bored softnet 6226 243457 0 0 3 0x14200 bored softnet 29415 172706 0 0 3 0x14200 bored systqmp 18735 234723 0 0 3 0x14200 bored systq 62184 277646 0 0 3 0x40014200 bored softclock 70775 71816 0 0 3 0x40014200 idle0 1 256790 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 10210 6434K 11108K 78643K 33842 0 pcb 13 18K 22K 78643K 3213 0 rtable 188 17K 19K 78643K 3647 0 ifaddr 102 21K 24K 78643K 1317 0 sysctl 2 0K 2K 78643K 5 0 counters 29 17K 17K 78643K 271 0 ioctlops 1 1K 4K 78643K 4092 0 iov 0 0K 20K 78643K 1792 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1493 93K 94K 78643K 10758 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 114 0 VM map 2 0K 0K 78643K 2 0 sem 18 16K 32K 78643K 351 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 69K 78643K 15577 0 sigio 0 0K 0K 78643K 370 0 proc 57 43K 84K 78643K 3303 0 subproc 104 6K 7K 78643K 1157 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 671 0 in_multi 66 4K 6K 78643K 1265 0 ether_multi 1 0K 0K 78643K 83 0 mrt 1 0K 0K 78643K 45 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 4579 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 590 1612K 1614K 78643K 85351 0 UVM aobj 134 8K 8K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1504 0 NDP 17 0K 1K 78643K 425 0 temp 147 4718K 66415K 78643K 259807 0 kqueue 6 10K 26K 78643K 1151 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 1339 0 1338 12 11 1 3 0 8 0 rtentry 112 1153 0 1082 6 3 3 4 0 8 0 unpcb 144 9333 0 9326 110 104 6 8 0 8 5 syncache 296 73 0 73 18 18 0 1 0 8 0 sackhl 24 1 3 1 1 1 0 1 0 8 0 tcpqe 32 73 0 73 12 12 0 1 0 8 0 tcpcb 768 6380 0 6372 220 214 6 15 0 8 5 arp 88 186 0 174 1 0 1 1 0 8 0 ipq 40 16 0 15 7 6 1 1 0 8 0 ipqe 40 42 0 41 7 6 1 1 0 8 0 inpcb 336 17074 0 17069 231 227 4 13 0 8 3 nd6 48 289 0 273 1 0 1 1 0 8 0 pkpcb 40 206 0 206 8 8 0 1 0 8 0 kcovpl 48 89 0 81 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 106 0 104 19 18 1 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pfrke_plain 168 2 0 2 1 1 0 1 0 8 0 pfrktable 1344 22 0 20 1 0 1 1 0 8 0 pfanchor 1280 20 0 18 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstkey 120 4 0 4 1 1 0 1 0 8 0 pfstate 336 4 0 4 1 1 0 1 0 8 0 pfrule 1360 85 0 73 3 2 1 2 0 8 0 rttmr 136 8 0 8 3 3 0 1 0 8 0 art_heap8 4096 4 0 3 3 2 1 3 0 8 0 art_heap4 256 5304 0 4986 84 62 22 29 0 8 1 art_table 32 5308 0 4989 5 2 3 4 0 8 0 art_node 16 1145 0 1084 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 14 3 3 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 324 0 308 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 22111 0 20642 93 0 93 93 0 8 0 ffsino 240 22111 0 20642 88 0 88 88 0 8 0 nchpl 144 42683 0 41052 63 1 62 63 0 8 0 rtmask 32 16 0 16 7 7 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 170152 0 170152 13 12 1 2 0 8 1 vcpupl 2048 243 0 1 31 0 31 31 0 8 0 vmpool 536 271 0 29 17 0 17 17 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 486 0 452 7 4 3 3 0 8 0 scsiplug 72 23 0 23 7 7 0 1 0 8 0 scxspl 216 134969 0 134969 29 28 1 8 0 8 1 plimitpl 152 2137 0 2124 1 0 1 1 0 8 0 sigapl 424 15761 0 15717 15 9 6 8 0 8 0 futexpl 64 167512 0 167506 8 7 1 1 0 8 0 knotepl 120 251184 0 251120 108 103 5 11 0 8 2 kqueuepl 184 2521 0 2516 26 25 1 4 0 8 0 pipepl 288 3750 0 3722 85 82 3 11 0 8 0 fdescpl 432 15682 0 15658 4 1 3 4 0 8 0 filepl 120 118488 0 118265 177 163 14 17 0 8 5 lockfpl 104 20477 0 20473 41 39 2 4 0 8 1 lockfspl 48 5186 0 5184 1 0 1 1 0 8 0 sessionpl 144 103 0 88 1 0 1 1 0 8 0 pgrppl 48 137 0 122 1 0 1 1 0 8 0 ucredpl 104 15084 0 15075 1 0 1 1 0 8 0 zombiepl 144 15719 0 15717 4 3 1 1 0 8 0 processpl 1000 15761 0 15717 17 11 6 9 0 8 0 procpl 672 39549 0 39484 35 27 8 9 0 8 0 sosppl 168 110 0 110 20 20 0 1 0 8 0 sockpl 456 27979 0 27966 616 606 10 29 0 8 8 mcl64k 65536 709 0 709 36 36 0 1 0 8 0 mcl16k 16384 212 0 212 39 39 0 1 0 8 0 mcl12k 12288 545 0 545 43 42 1 1 0 8 1 mcl9k 9216 304 0 304 45 44 1 1 0 8 1 mcl8k 8192 932 0 932 38 37 1 1 0 8 1 mcl4k 4096 2011 0 2011 29 28 1 3 0 8 1 mcl2k2 2112 142 0 142 42 41 1 1 0 8 1 mcl2k 2048 103634 0 103601 58 52 6 16 0 8 1 mtagpl 96 4562 0 4562 34 34 0 29 0 8 0 mbufpl 256 269249 0 269198 322 315 7 198 0 8 0 bufpl 288 28722 0 22315 458 0 458 458 0 8 0 anonpl 24 2946607 0 2928321 305 178 127 193 0 188 0 amapchunkpl 152 268634 0 267866 203 170 33 62 0 158 0 amappl16 200 40729 0 40033 156 117 39 50 0 8 0 amappl15 192 3174 0 3169 1 0 1 1 0 8 0 amappl14 184 2225 0 2218 2 1 1 1 0 8 0 amappl13 176 3069 0 3066 1 0 1 1 0 8 0 amappl12 168 1238 0 1234 1 0 1 1 0 8 0 amappl11 160 951 0 940 1 0 1 1 0 8 0 amappl10 152 1855 0 1849 1 0 1 1 0 8 0 amappl9 144 1486 0 1486 3 3 0 1 0 8 0 amappl8 136 5311 0 5189 5 0 5 5 0 8 0 amappl7 128 3500 0 3472 1 0 1 1 0 8 0 amappl6 120 1731 0 1709 2 1 1 2 0 8 0 amappl5 112 13278 0 13266 1 0 1 1 0 8 0 amappl4 104 4989 0 4947 3 1 2 2 0 8 0 amappl3 96 46857 0 46810 2 0 2 2 0 8 0 amappl2 88 4347 0 4312 2 0 2 2 0 8 0 amappl1 80 384262 0 383650 24 10 14 20 0 8 0 amappl 88 82991 0 82730 9 2 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 72 139 0 6 3 0 3 3 0 8 0 uaddrrnd 24 15953 0 15687 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15953 0 15687 2 0 2 2 0 8 0 vmmpekpl 168 111785 0 111690 5 0 5 5 0 8 0 vmmpepl 168 1548035 0 1544991 405 262 143 172 0 357 0 vmsppl 272 15952 0 15687 22 4 18 18 0 8 0 rwobjpl 24 365854 0 358016 49 0 49 49 0 8 0 pdppl 4096 31912 0 31616 1190 890 300 300 0 8 4 pvpl 32 5924457 0 5903912 500 308 192 306 0 265 0 pmappl 216 15952 0 15687 15 0 15 15 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2831 0 1791 34 3 31 33 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff800024e13392,ffff800024e134a4,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800024e13378,3f92,7514,ffff800000df6a6c,3f92) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002cceb338,ffff800000df6800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002cceb338,ffff800000df6800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000df6800,1,ffff800022bc4550) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000df6800,1,ffff800022bc4550) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806a623008,82907003,ffff800000df6800,1,fffffd807f7d7750,ffff800022bc4550) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8074ac4ca8,82907003,ffff800000df6800,ffff800022bc4550) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800022bc4550,ffff80002cceb688,ffff80002cceb6e0) at sys_ioctl+0x49e syscall(ffff80002cceb750) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60a772118c0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff800024e13392,ffff800024e134a4,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800024e13378,3f92,7514,ffff800000df6a6c,3f92) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002cceb338,ffff800000df6800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002cceb338,ffff800000df6800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000df6800,1,ffff800022bc4550) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000df6800,1,ffff800022bc4550) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806a623008,82907003,ffff800000df6800,1,fffffd807f7d7750,ffff800022bc4550) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8074ac4ca8,82907003,ffff800000df6800,ffff800022bc4550) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800022bc4550,ffff80002cceb688,ffff80002cceb6e0) at sys_ioctl+0x49e syscall(ffff80002cceb750) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60a772118c0, count: -9