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(ffff80002e96b822,ffff80002e96b934,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e96b808,3be6,1502,ffff8000006cba6c,3be6) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002b0bb0b8,ffff8000006cb800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002b0bb0b8,ffff8000006cb800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff8000006cb800,1,ffff80002170a7e0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff8000006cb800,1,ffff80002170a7e0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8075b3ede0,82907003,ffff8000006cb800,1,fffffd807f7d78f0,ffff80002170a7e0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c6f8f10,82907003,ffff8000006cb800,ffff80002170a7e0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002170a7e0,ffff80002b0bb408,ffff80002b0bb460) at sys_ioctl+0x49e syscall(ffff80002b0bb4d0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfecb696810, count: -9 ddb> show registers rdi 0xffff80002845e000 rsi 0 rbp 0xffff80002b0baf40 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0xa9b7f56357a26380 r11 0x2fcf20fa8409ffb3 r12 0xffff80002e96b934 r13 0 r14 0xffff80002e96b822 r15 0 rip 0xffffffff814045cf rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002b0baee0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.7) pid=337821 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff80002170a000,0xffff80002170ba50 process=0xffff8000ffff63f8 user=0xffff80002b0b6000, vmspace=0xfffffd806d8e5bb0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 1302 240977 58148 0 3 0x80 nanoslp syz-executor.3 1302 408787 58148 0 3 0x4000080 fsleep syz-executor.3 94925 56874 9179 0 2 0 syz-executor.5 94925 460451 9179 0 2 0x4000000 syz-executor.5 10347 330521 79783 0 2 0 syz-executor.7 *10347 337821 79783 0 7 0x4000000 syz-executor.7 51430 202704 79725 0 3 0x80 nanoslp syz-executor.2 51430 320841 79725 0 3 0x4000080 ttyout syz-executor.2 51430 29876 79725 0 3 0x4000080 fsleep syz-executor.2 51430 363994 79725 0 3 0x4000080 fsleep syz-executor.2 81146 493551 69568 0 3 0x82 nanoslp syz-executor.1 62465 61509 69568 0 2 0x2 syz-executor.0 9179 59113 69568 0 3 0x82 nanoslp syz-executor.5 31104 186955 69568 0 2 0x2 syz-executor.6 79783 7419 69568 0 3 0x82 nanoslp syz-executor.7 79725 440969 69568 0 3 0x82 nanoslp syz-executor.2 98824 384795 1 0 3 0x100083 ttyin getty 58148 497490 69568 0 3 0x82 nanoslp syz-executor.3 65444 261529 69568 0 3 0x82 nanoslp syz-executor.4 57345 63847 0 0 3 0x14200 bored sosplice 69568 523709 71223 0 3 0x82 thrsleep syz-fuzzer 69568 142131 71223 0 3 0x4000082 nanoslp syz-fuzzer 69568 371520 71223 0 3 0x4000082 thrsleep syz-fuzzer 69568 111056 71223 0 3 0x4000082 wait syz-fuzzer 69568 59472 71223 0 3 0x4000082 wait syz-fuzzer 69568 521152 71223 0 3 0x4000082 wait syz-fuzzer 69568 116214 71223 0 3 0x4000082 wait syz-fuzzer 69568 452582 71223 0 3 0x4000082 thrsleep syz-fuzzer 69568 175507 71223 0 3 0x4000082 thrsleep syz-fuzzer 69568 431020 71223 0 3 0x4000082 wait syz-fuzzer 69568 343877 71223 0 3 0x4000082 wait syz-fuzzer 69568 2745 71223 0 3 0x4000082 wait syz-fuzzer 69568 477552 71223 0 3 0x4000082 kqread syz-fuzzer 69568 90834 71223 0 3 0x4000082 wait syz-fuzzer 71223 516899 77344 0 3 0x10008a sigsusp ksh 77344 481686 97746 0 3 0x9a kqread sshd 97746 288930 1 0 3 0x88 kqread sshd 9909 168376 17600 73 3 0x1100090 kqread syslogd 17600 346344 1 0 3 0x100082 netio syslogd 53441 192091 1 0 3 0x100080 kqread resolvd 70924 100670 0 0 3 0x14200 bored smr 95066 394972 0 0 2 0x14200 zerothread 747 466979 0 0 3 0x14200 aiodoned aiodoned 8460 13770 0 0 3 0x14200 syncer update 58164 78260 0 0 3 0x14200 cleaner cleaner 57894 261795 0 0 3 0x14200 reaper reaper 77986 319428 0 0 3 0x14200 pgdaemon pagedaemon 98082 6845 0 0 3 0x14200 bored viomb 7253 426410 0 0 3 0x40014200 acpi0 acpi0 38284 39064 0 0 3 0x14200 bored softnet 93668 75301 0 0 3 0x14200 bored softnet 91407 265265 0 0 3 0x14200 bored softnet 14594 509494 0 0 3 0x14200 bored softnet 35160 301994 0 0 3 0x14200 bored systqmp 82830 137401 0 0 3 0x14200 bored systq 62463 38148 0 0 3 0x40014200 bored softclock 42234 215555 0 0 3 0x40014200 idle0 1 249440 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 10180 6420K 7260K 78643K 15381 0 pcb 13 15K 20K 78643K 1315 0 rtable 228 25K 26K 78643K 4136 0 ifaddr 107 23K 24K 78643K 1287 0 sysctl 3 1K 1K 78643K 5 0 counters 30 17K 17K 78643K 291 0 ioctlops 1 1K 4K 78643K 2176 0 iov 0 0K 32K 78643K 859 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1338 84K 84K 78643K 3487 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 46 0 VM map 2 0K 0K 78643K 2 0 sem 19 11K 11K 78643K 277 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 73K 78643K 6190 0 sigio 0 0K 0K 78643K 27 0 proc 55 43K 75K 78643K 2076 0 subproc 104 6K 6K 78643K 741 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 310 0 in_multi 68 4K 7K 78643K 768 0 ether_multi 1 0K 0K 78643K 22 0 mrt 1 0K 0K 78643K 16 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 2980 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 378 803K 804K 78643K 34612 0 UVM aobj 71 3K 3K 78643K 74 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 229 0 NDP 16 0K 2K 78643K 254 0 temp 144 4718K 5742K 78643K 99126 0 kqueue 6 10K 24K 78643K 558 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 120 728 0 727 8 7 1 3 0 8 0 rtentry 112 823 0 746 4 1 3 4 0 8 0 unpcb 144 5115 0 5109 56 55 1 10 0 8 0 syncache 296 35 0 35 8 8 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 60 49 60 2 2 0 1 0 8 0 tcpcb 768 2367 0 2357 105 103 2 15 0 8 0 arp 88 118 0 104 1 0 1 1 0 8 0 ipq 40 11 0 11 4 4 0 1 0 8 0 ipqe 40 33 0 33 4 4 0 1 0 8 0 inpcb 336 6030 0 6019 100 93 7 13 0 8 5 nd6 48 183 0 165 1 0 1 1 0 8 0 pkpcb 40 85 0 85 3 3 0 1 0 8 0 kcovpl 48 57 0 49 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1160 188 0 186 10 9 1 1 0 8 0 pfstscr 40 19 0 19 4 4 0 1 0 8 0 pfrktable 1344 706 0 687 5 3 2 2 0 8 0 pfanchor 1280 113 0 74 4 0 4 4 0 8 0 pftag 88 51 0 38 1 0 1 1 0 8 0 pfstitem 24 23 0 21 1 0 1 1 0 8 0 pfstkey 120 37 0 35 2 1 1 1 0 8 0 pfstate 336 22 0 21 2 1 1 1 0 8 0 pfrule 1360 429 0 350 8 1 7 7 0 8 0 art_heap8 4096 5 0 4 3 2 1 3 0 8 0 art_heap4 256 3460 0 3151 52 29 23 29 0 8 0 art_table 32 3465 0 3155 4 0 4 4 0 8 0 art_node 16 754 0 688 1 0 1 1 0 8 0 sysvmsgpl 40 85 0 79 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 237 0 220 1 0 1 1 0 8 0 shmpl 112 71 0 3 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8947 0 7489 92 0 92 92 0 8 0 ffsino 240 8947 0 7489 86 0 86 86 0 8 0 nchpl 144 17043 0 16540 63 41 22 63 0 8 0 rtmask 32 10 0 10 4 4 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 72612 0 72611 11 10 1 2 0 8 0 vcpupl 2048 210 0 0 27 0 27 27 0 8 0 vmpool 536 250 0 40 14 0 14 14 0 8 0 pfiaddrpl 120 227 0 196 1 0 1 1 0 8 0 kstatmem 264 268 0 236 3 0 3 3 0 8 0 scsiplug 72 20 0 20 3 3 0 1 0 8 0 scxspl 216 57255 0 57255 21 20 1 8 0 8 1 plimitpl 152 1031 0 1017 1 0 1 1 0 8 0 sigapl 424 6420 0 6379 8 3 5 8 0 8 0 futexpl 64 63423 0 63420 8 7 1 1 0 8 0 knotepl 120 111987 0 111923 48 42 6 10 0 8 3 kqueuepl 184 1319 0 1314 19 18 1 4 0 8 0 pipepl 288 1291 0 1263 32 27 5 7 0 8 2 fdescpl 432 6363 0 6339 4 1 3 4 0 8 0 filepl 120 48023 0 47799 70 59 11 16 0 8 3 lockfpl 104 2328 0 2327 9 8 1 2 0 8 0 lockfspl 48 350 0 349 1 0 1 1 0 8 0 sessionpl 144 74 0 59 1 0 1 1 0 8 0 pgrppl 48 99 0 84 1 0 1 1 0 8 0 ucredpl 104 4712 0 4705 1 0 1 1 0 8 0 zombiepl 144 6381 0 6379 2 1 1 1 0 8 0 processpl 1000 6420 0 6379 9 3 6 9 0 8 0 procpl 672 15538 0 15478 12 5 7 9 0 8 0 sosppl 168 72 0 71 10 9 1 1 0 8 0 sockpl 456 12027 0 12009 273 262 11 33 0 8 8 mcl64k 65536 200 0 200 17 16 1 1 0 8 1 mcl16k 16384 57 0 57 17 17 0 1 0 8 0 mcl12k 12288 187 0 187 22 21 1 1 0 8 1 mcl9k 9216 68 0 68 16 16 0 1 0 8 0 mcl8k 8192 350 0 350 14 14 0 1 0 8 0 mcl4k 4096 783 0 783 14 13 1 3 0 8 1 mcl2k2 2112 43 0 43 15 14 1 1 0 8 1 mcl2k 2048 80923 0 80883 42 36 6 22 0 8 0 mtagpl 96 1021 0 1021 25 25 0 24 0 8 0 mbufpl 256 181780 0 181687 431 422 9 340 0 8 0 bufpl 288 14749 0 8348 458 0 458 458 0 8 0 anonpl 24 1260347 0 1243815 271 159 112 175 0 188 0 amapchunkpl 152 102906 0 102194 106 77 29 57 0 158 0 amappl16 200 18598 0 17992 114 81 33 44 0 8 0 amappl15 192 1682 0 1676 1 0 1 1 0 8 0 amappl14 184 1144 0 1140 1 0 1 1 0 8 0 amappl13 176 1198 0 1197 1 0 1 1 0 8 0 amappl12 168 461 0 453 1 0 1 1 0 8 0 amappl11 160 556 0 546 1 0 1 1 0 8 0 amappl10 152 917 0 915 1 0 1 1 0 8 0 amappl9 144 1025 0 1022 1 0 1 1 0 8 0 amappl8 136 1612 0 1531 3 0 3 3 0 8 0 amappl7 128 492 0 468 1 0 1 1 0 8 0 amappl6 120 1030 0 1010 2 1 1 2 0 8 0 amappl5 112 5410 0 5400 1 0 1 1 0 8 0 amappl4 104 2882 0 2851 2 1 1 2 0 8 0 amappl3 96 17733 0 17685 2 0 2 2 0 8 0 amappl2 88 2039 0 2008 2 1 1 2 0 8 0 amappl1 80 155166 0 154558 21 7 14 19 0 8 0 amappl 88 33197 0 33004 5 0 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 73 0 3 2 0 2 2 0 8 0 uaddrrnd 24 6613 0 6379 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6613 0 6379 2 0 2 2 0 8 0 vmmpekpl 168 47882 0 47805 4 0 4 4 0 8 0 vmmpepl 168 638956 0 636173 269 139 130 145 0 357 1 vmsppl 272 6612 0 6379 16 0 16 16 0 8 0 rwobjpl 24 155007 0 147446 47 0 47 47 0 8 0 pdppl 4096 13232 0 12968 682 416 266 268 0 8 2 pvpl 32 2563156 0 2543675 495 313 182 293 0 265 0 pmappl 216 6612 0 6379 15 1 14 14 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2111 0 1099 39 9 30 38 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002e96b822,ffff80002e96b934,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e96b808,3be6,1502,ffff8000006cba6c,3be6) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002b0bb0b8,ffff8000006cb800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002b0bb0b8,ffff8000006cb800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff8000006cb800,1,ffff80002170a7e0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff8000006cb800,1,ffff80002170a7e0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8075b3ede0,82907003,ffff8000006cb800,1,fffffd807f7d78f0,ffff80002170a7e0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c6f8f10,82907003,ffff8000006cb800,ffff80002170a7e0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002170a7e0,ffff80002b0bb408,ffff80002b0bb460) at sys_ioctl+0x49e syscall(ffff80002b0bb4d0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfecb696810, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002e96b822,ffff80002e96b934,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e96b808,3be6,1502,ffff8000006cba6c,3be6) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002b0bb0b8,ffff8000006cb800) at pipex_init_session+0x5d6 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002b0bb0b8,ffff8000006cb800) at pipex_init_session+0x5d6 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff8000006cb800,1,ffff80002170a7e0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff8000006cb800,1,ffff80002170a7e0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8075b3ede0,82907003,ffff8000006cb800,1,fffffd807f7d78f0,ffff80002170a7e0) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c6f8f10,82907003,ffff8000006cb800,ffff80002170a7e0) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002170a7e0,ffff80002b0bb408,ffff80002b0bb460) at sys_ioctl+0x49e syscall(ffff80002b0bb4d0) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdfecb696810, count: -9