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(ffff80002ea1b37a,ffff80002ea1b48c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002ea1b360,fffff67c,1fee,ffff800000cb4a6c,fffff67c) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e9d9138,ffff800000cb4800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e9d9138,ffff800000cb4800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000cb4800,1,ffff8000216f1ce0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000cb4800,1,ffff8000216f1ce0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80771c6d80,82907003,ffff800000cb4800,1,fffffd807f7d7888,ffff8000216f1ce0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a8072d0,82907003,ffff800000cb4800,ffff8000216f1ce0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000216f1ce0,ffff80002e9d9488,ffff80002e9d94e0) at sys_ioctl+0x49e syscall(ffff80002e9d9550) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddee7e14e60, count: -9 ddb> show registers rdi 0xffff8000231d4000 rsi 0 rbp 0xffff80002e9d8fc0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0xf4c92b0778dfc682 r11 0xa70adce7415597a2 r12 0xffff80002ea1b48c r13 0 r14 0xffff80002ea1b37a r15 0 rip 0xffffffff81771c5f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e9d8f60 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.0) pid=382724 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000216f07e0,0xffffffff829b5088 process=0xffff8000ffff63f8 user=0xffff80002e9d4000, vmspace=0xfffffd807a7a6dd0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 7760 501200 13819 0 2 0 syz-executor.0 * 7760 382724 13819 0 7 0x4000000 syz-executor.0 69262 144501 76382 0 3 0x80 nanoslp syz-executor.1 69262 462794 76382 0 3 0x4000080 netcon syz-executor.1 69262 343947 76382 0 3 0x4000080 fsleep syz-executor.1 69262 365950 76382 0 3 0x4000080 fsleep syz-executor.1 8476 447017 12076 0 2 0 syz-executor.6 8476 68784 12076 0 3 0x4000080 kqread syz-executor.6 76382 132796 45483 0 3 0x82 nanoslp syz-executor.1 54561 45773 1 0 3 0x100083 ttyin getty 11677 501213 45483 0 2 0x2 syz-executor.3 8425 23988 45483 0 2 0x2 syz-executor.7 13819 399 45483 0 3 0x82 nanoslp syz-executor.0 82473 522181 45483 0 2 0x2 syz-executor.2 51540 487413 45483 0 3 0x82 nanoslp syz-executor.4 12076 390106 45483 0 3 0x82 nanoslp syz-executor.6 27019 88411 45483 0 3 0x82 piperd syz-executor.5 63214 6466 0 0 3 0x14280 nfsidl nfsio 68144 291445 0 0 3 0x14280 nfsidl nfsio 87320 457717 0 0 3 0x14280 nfsidl nfsio 60710 410605 0 0 3 0x14280 nfsidl nfsio 94856 2578 0 0 3 0x14280 nfsidl nfsio 60450 400994 0 0 3 0x14280 nfsidl nfsio 4324 292293 0 0 3 0x14280 nfsidl nfsio 64404 389179 0 0 3 0x14280 nfsidl nfsio 3654 511540 0 0 3 0x14280 nfsidl nfsio 64588 188288 0 0 3 0x14280 nfsidl nfsio 42315 294109 0 0 3 0x14280 nfsidl nfsio 50205 140403 0 0 3 0x14280 nfsidl nfsio 62668 119045 0 0 3 0x14280 nfsidl nfsio 78805 89402 0 0 3 0x14280 nfsidl nfsio 81697 16669 0 0 3 0x14280 nfsidl nfsio 42900 183070 0 0 3 0x14280 nfsidl nfsio 61434 438695 0 0 3 0x14280 nfsidl nfsio 17484 462234 0 0 3 0x14280 nfsidl nfsio 50194 20115 0 0 3 0x14280 nfsidl nfsio 41815 499285 0 0 3 0x14280 nfsidl nfsio 27365 289474 0 0 3 0x14200 bored sosplice 45483 294796 61327 0 3 0x82 wait syz-fuzzer 45483 519275 61327 0 3 0x4000082 nanoslp syz-fuzzer 45483 353130 61327 0 3 0x4000082 wait syz-fuzzer 45483 355319 61327 0 3 0x4000082 thrsleep syz-fuzzer 45483 62891 61327 0 3 0x4000082 wait syz-fuzzer 45483 344542 61327 0 3 0x4000082 thrsleep syz-fuzzer 45483 133992 61327 0 3 0x4000082 thrsleep syz-fuzzer 45483 7049 61327 0 3 0x4000082 thrsleep syz-fuzzer 45483 139203 61327 0 3 0x4000082 wait syz-fuzzer 45483 107810 61327 0 3 0x4000082 wait syz-fuzzer 45483 463283 61327 0 3 0x4000082 wait syz-fuzzer 45483 488291 61327 0 3 0x4000082 wait syz-fuzzer 45483 471594 61327 0 3 0x4000082 wait syz-fuzzer 45483 297957 61327 0 3 0x4000082 kqread syz-fuzzer 61327 308430 24482 0 3 0x10008a sigsusp ksh 24482 381977 95181 0 3 0x9a kqread sshd 95181 456788 1 0 3 0x88 kqread sshd 68884 184181 59521 73 3 0x1100090 kqread syslogd 59521 239395 1 0 3 0x100082 netio syslogd 25669 503269 1 0 3 0x100080 kqread resolvd 61895 136201 57911 77 3 0x100092 kqread dhcpleased 16132 475917 57911 77 3 0x100092 kqread dhcpleased 57911 314187 1 0 3 0x80 kqread dhcpleased 78401 233262 0 0 3 0x14200 bored smr 1544 256444 0 0 2 0x14200 zerothread 34591 41044 0 0 3 0x14200 aiodoned aiodoned 20867 432946 0 0 3 0x14200 syncer update 46991 195707 0 0 3 0x14200 cleaner cleaner 21777 416245 0 0 3 0x14200 reaper reaper 87508 68180 0 0 3 0x14200 pgdaemon pagedaemon 47002 474488 0 0 3 0x14200 bored viomb 25975 144050 0 0 3 0x40014200 acpi0 acpi0 11545 495649 0 0 3 0x14200 bored softnet 94229 60159 0 0 3 0x14200 bored softnet 68020 113874 0 0 3 0x14200 bored softnet 50186 324532 0 0 3 0x14200 bored softnet 93614 466167 0 0 3 0x14200 bored systqmp 48016 519614 0 0 3 0x14200 bored systq 6951 217668 0 0 3 0x40014200 bored softclock 53749 126729 0 0 3 0x40014200 idle0 1 327899 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 10214 6505K 7713K 78643K 28324 0 pcb 13 20K 25K 78643K 2359 0 rtable 190 12K 13K 78643K 2431 0 ifaddr 98 21K 23K 78643K 966 0 sysctl 3 1K 3K 78643K 7 0 counters 29 17K 17K 78643K 205 0 ioctlops 1 1K 4K 78643K 7653 0 iov 0 0K 32K 78643K 1590 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1516 95K 95K 78643K 8275 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 102 0 VM map 2 0K 0K 78643K 2 0 sem 20 10K 20K 78643K 42 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 73K 78643K 13296 0 sigio 0 0K 0K 78643K 1343 0 proc 67 59K 75K 78643K 1972 0 subproc 104 6K 6K 78643K 598 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 640 0 in_multi 70 4K 6K 78643K 711 0 ether_multi 1 0K 0K 78643K 57 0 mrt 1 0K 0K 78643K 84 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 187 837K 837K 78643K 187 0 exec 0 0K 2K 78643K 3962 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 550 1444K 1449K 78643K 74261 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 623 0 NDP 16 0K 2K 78643K 290 0 temp 144 4718K 66403K 78643K 157715 0 kqueue 13 20K 28K 78643K 1012 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 1222 0 1219 17 15 2 3 0 8 1 rtentry 112 706 0 631 5 2 3 4 0 8 0 unpcb 144 10069 0 10056 107 105 2 8 0 8 1 syncache 296 282 0 282 25 24 1 1 0 8 1 tcpqe 32 215 0 215 15 14 1 1 0 8 1 tcpcb 768 8296 0 8285 249 246 3 26 0 8 1 arp 88 116 0 101 1 0 1 1 0 8 0 ipq 40 48 0 48 8 8 0 1 0 8 0 ipqe 40 251 0 251 8 8 0 1 0 8 0 inpcb 336 16334 0 16324 236 234 2 16 0 8 1 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 165 0 148 1 0 1 1 0 8 0 pkpcb 40 51 0 51 5 4 1 1 0 8 1 kcovpl 48 46 0 38 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 84 0 82 21 20 1 1 0 8 0 pfanchor 1280 42 0 25 2 0 2 2 0 8 0 pfrule 1360 3 0 3 1 1 0 1 0 8 0 rttmr 136 19 0 19 6 6 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2819 0 2482 58 32 26 30 0 8 0 art_table 32 2820 0 2482 4 0 4 4 0 8 0 art_node 16 657 0 592 1 0 1 1 0 8 0 sysvmsgpl 40 46 0 26 2 1 1 1 0 8 0 semapl 112 18 0 0 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 19722 0 18231 94 0 94 94 0 8 0 ffsino 240 19722 0 18231 89 0 89 89 0 8 0 nchpl 144 37359 0 35722 63 1 62 63 0 8 0 rtmask 32 3 0 3 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 148988 0 148988 5 4 1 2 0 8 1 vcpupl 2048 241 0 0 31 0 31 31 0 8 0 vmpool 536 251 0 10 17 0 17 17 0 8 0 kstatmem 264 374 0 342 3 0 3 3 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 107519 0 107519 33 31 2 8 0 8 2 plimitpl 152 2281 0 2267 1 0 1 1 0 8 0 sigapl 424 13529 0 13467 8 0 8 8 0 8 0 futexpl 64 139201 0 139199 4 3 1 1 0 8 0 knotepl 120 186032 0 185949 110 106 4 17 0 8 0 kqueuepl 184 3187 0 3145 50 47 3 7 0 8 0 pipepl 288 3693 0 3665 85 80 5 10 0 8 2 fdescpl 432 13492 0 13468 4 0 4 4 0 8 0 filepl 120 110973 0 110700 167 156 11 17 0 8 2 lockfpl 104 4162 0 4160 10 9 1 2 0 8 0 lockfspl 48 1257 0 1255 1 0 1 1 0 8 0 sessionpl 144 65 0 49 1 0 1 1 0 8 0 pgrppl 48 199 0 183 1 0 1 1 0 8 0 ucredpl 104 14074 0 14064 1 0 1 1 0 8 0 zombiepl 144 13468 0 13467 2 1 1 1 0 8 0 processpl 1000 13529 0 13467 10 1 9 9 0 8 0 procpl 672 35048 0 34968 37 29 8 9 0 8 0 sosppl 168 162 0 162 25 25 0 1 0 8 0 sockpl 456 27699 0 27673 576 568 8 42 0 8 4 mcl64k 65536 437 0 437 32 31 1 1 0 8 1 mcl16k 16384 191 0 191 40 39 1 1 0 8 1 mcl12k 12288 417 0 417 33 32 1 1 0 8 1 mcl9k 9216 181 0 181 40 39 1 1 0 8 1 mcl8k 8192 614 0 614 26 25 1 1 0 8 1 mcl4k 4096 1563 0 1563 13 12 1 1 0 8 1 mcl2k2 2112 93 0 93 32 31 1 1 0 8 1 mcl2k 2048 98410 0 98348 37 27 10 13 0 8 1 mtagpl 96 1223 0 1151 17 15 2 6 0 8 0 mbufpl 256 249007 0 248764 172 145 27 107 0 8 6 bufpl 288 25487 0 19083 458 0 458 458 0 8 0 anonpl 24 2542541 0 2519960 327 174 153 172 0 188 5 amapchunkpl 152 214177 0 213313 97 59 38 47 0 158 1 amappl16 200 36963 0 36124 155 106 49 59 0 8 3 amappl15 192 2108 0 2102 1 0 1 1 0 8 0 amappl14 184 2707 0 2698 1 0 1 1 0 8 0 amappl13 176 1997 0 1995 1 0 1 1 0 8 0 amappl12 168 1475 0 1468 1 0 1 1 0 8 0 amappl11 160 1317 0 1301 1 0 1 1 0 8 0 amappl10 152 898 0 894 1 0 1 1 0 8 0 amappl9 144 1473 0 1466 1 0 1 1 0 8 0 amappl8 136 5239 0 5141 4 0 4 4 0 8 0 amappl7 128 4098 0 4078 1 0 1 1 0 8 0 amappl6 120 1442 0 1423 2 1 1 2 0 8 0 amappl5 112 9883 0 9872 1 0 1 1 0 8 0 amappl4 104 5268 0 5234 4 3 1 2 0 8 0 amappl3 96 40474 0 40425 2 0 2 2 0 8 0 amappl2 88 4186 0 4147 2 1 1 2 0 8 0 amappl1 80 331937 0 331341 21 6 15 20 0 8 0 amappl 88 72640 0 72394 7 0 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 13743 0 13478 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 13743 0 13478 2 0 2 2 0 8 0 vmmpekpl 168 100437 0 100356 4 0 4 4 0 8 0 vmmpepl 168 1311227 0 1308154 347 188 159 174 0 357 2 vmsppl 272 13742 0 13478 22 4 18 18 0 8 0 rwobjpl 24 318486 0 310500 53 2 51 51 0 8 0 pdppl 4096 27492 0 27197 1010 705 305 305 0 8 10 pvpl 32 4968041 0 4948152 504 315 189 239 0 265 5 pmappl 216 13742 0 13478 16 1 15 15 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2417 0 1341 33 2 31 31 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002ea1b37a,ffff80002ea1b48c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002ea1b360,fffff67c,1fee,ffff800000cb4a6c,fffff67c) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e9d9138,ffff800000cb4800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e9d9138,ffff800000cb4800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000cb4800,1,ffff8000216f1ce0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000cb4800,1,ffff8000216f1ce0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80771c6d80,82907003,ffff800000cb4800,1,fffffd807f7d7888,ffff8000216f1ce0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a8072d0,82907003,ffff800000cb4800,ffff8000216f1ce0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000216f1ce0,ffff80002e9d9488,ffff80002e9d94e0) at sys_ioctl+0x49e syscall(ffff80002e9d9550) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddee7e14e60, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002ea1b37a,ffff80002ea1b48c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002ea1b360,fffff67c,1fee,ffff800000cb4a6c,fffff67c) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002e9d9138,ffff800000cb4800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e9d9138,ffff800000cb4800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000cb4800,1,ffff8000216f1ce0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000cb4800,1,ffff8000216f1ce0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd80771c6d80,82907003,ffff800000cb4800,1,fffffd807f7d7888,ffff8000216f1ce0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807a8072d0,82907003,ffff800000cb4800,ffff8000216f1ce0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000216f1ce0,ffff80002e9d9488,ffff80002e9d94e0) at sys_ioctl+0x49e syscall(ffff80002e9d9550) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddee7e14e60, count: -9