kernel: integer divide fault trap, code=0 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace rc4_keysetup(ffff80002e537f6a,ffff80002e53807c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e537f30,ffffd510,7d71,ffff800000c4f26c,ffffd510) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff800021345d28,ffff800000c4f000) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff800021345d28,ffff800000c4f000) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000c4f000,1,ffff80002961da48) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c4f000,1,ffff80002961da48) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8067e41870,82907003,ffff800000c4f000,1,fffffd807f7d7478,ffff80002961da48) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806694ce58,82907003,ffff800000c4f000,ffff80002961da48) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002961da48,ffff800021346078,ffff8000213460c0) at sys_ioctl+0x4a2 syscall(ffff800021346140) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800021346140) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6e49f0044b0, count: -9 ddb{0}> show registers rdi 0xffff800027c0d000 rsi 0 rbp 0xffff800021345bb0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x6124fe6cd3e3afa7 r11 0x42d23a84714c796e r12 0xffff80002e53807c r13 0 r14 0xffff80002e537f6a r15 0 rip 0xffffffff817ad5df rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021345b50 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor.3) pid=440810 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002961c7e8,0xffff80002961d7b8 process=0xffff80002962cc90 user=0xffff800021341000, vmspace=0xfffffd8068bb3310 estcpu=36, cpticks=7, pctcpu=0.97 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95910 418427 39398 0 3 0x80 nanoslp syz-executor.1 95910 12926 39398 0 3 0x4000080 fsleep syz-executor.1 58081 160277 60637 0 2 0 syz-executor.0 58081 309078 60637 0 3 0x4000080 fsleep syz-executor.0 58081 517051 60637 0 2 0x4000000 syz-executor.0 37299 205668 12301 0 2 0 syz-executor.6 37299 87592 12301 0 2 0x4000000 syz-executor.6 37299 306999 12301 0 3 0x4000080 fsleep syz-executor.6 58530 111790 80760 0 2 0 syz-executor.3 *58530 440810 80760 0 7 0x4000000 syz-executor.3 58530 429184 80760 0 3 0x4000080 fsleep syz-executor.3 72886 339470 82727 0 2 0 syz-executor.4 72886 136988 82727 0 3 0x4000080 netio syz-executor.4 72886 427498 82727 0 3 0x4000080 fsleep syz-executor.4 72886 521476 82727 0 3 0x4000080 fsleep syz-executor.4 12301 25026 17617 0 3 0x82 nanoslp syz-executor.6 82727 349091 17617 0 3 0x82 nanoslp syz-executor.4 58730 3 0 0 3 0x14200 acct acct 29127 469145 0 0 3 0x14200 bored sosplice 7020 164414 0 0 3 0x14280 nfsidl nfsio 47365 269477 0 0 3 0x14280 nfsidl nfsio 9480 388928 0 0 3 0x14280 nfsidl nfsio 40079 13876 0 0 3 0x14280 nfsidl nfsio 76758 139870 0 0 3 0x14280 nfsidl nfsio 28500 133504 0 0 3 0x14280 nfsidl nfsio 63666 2925 0 0 3 0x14280 nfsidl nfsio 38350 447028 0 0 3 0x14280 nfsidl nfsio 63866 263818 0 0 3 0x14280 nfsidl nfsio 6828 88558 0 0 3 0x14280 nfsidl nfsio 91113 311505 0 0 3 0x14280 nfsidl nfsio 59157 490919 0 0 3 0x14280 nfsidl nfsio 97225 429649 0 0 3 0x14280 nfsidl nfsio 20981 253725 0 0 3 0x14280 nfsidl nfsio 5831 469287 0 0 3 0x14280 nfsidl nfsio 86813 247949 0 0 3 0x14280 nfsidl nfsio 18085 75249 0 0 3 0x14280 nfsidl nfsio 42096 472773 0 0 3 0x14280 nfsidl nfsio 81579 428718 0 0 3 0x14280 nfsidl nfsio 53384 45118 0 0 3 0x14280 nfsidl nfsio 43695 440998 17617 0 3 0x82 nanoslp syz-executor.7 39398 102566 17617 0 7 0x2 syz-executor.1 80760 413976 17617 0 2 0x482 syz-executor.3 88731 184097 17617 0 2 0x482 syz-executor.5 72529 418400 17617 0 3 0x82 nanoslp syz-executor.2 60637 521953 17617 0 2 0x482 syz-executor.0 17617 101274 11623 0 3 0x82 wait syz-fuzzer 17617 144514 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 427311 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 255555 11623 0 3 0x4000082 wait syz-fuzzer 17617 229495 11623 0 3 0x4000082 wait syz-fuzzer 17617 383333 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 228586 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 145451 11623 0 3 0x4000082 wait syz-fuzzer 17617 89085 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 257520 11623 0 3 0x4000082 wait syz-fuzzer 17617 108244 11623 0 3 0x4000082 wait syz-fuzzer 17617 487240 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 320706 11623 0 3 0x4000082 wait syz-fuzzer 17617 468007 11623 0 3 0x4000082 thrsleep syz-fuzzer 17617 300063 11623 0 3 0x4000082 wait syz-fuzzer 17617 89184 11623 0 3 0x4000082 kqread syz-fuzzer 11623 90921 27290 0 3 0x10008a sigsusp ksh 27290 420888 57901 0 3 0x9a kqread sshd 45826 153129 1 0 3 0x100083 ttyin getty 57901 403525 1 0 3 0x88 kqread sshd 49922 45520 34796 74 3 0x1100092 bpf pflogd 34796 481660 1 0 3 0x80 netio pflogd 42009 326446 91128 73 3 0x1100090 kqread syslogd 91128 371765 1 0 3 0x100082 netio syslogd 30250 250948 1 0 3 0x100080 kqread resolvd 14135 41585 4353 77 3 0x100092 kqread dhcpleased 30115 100256 4353 77 3 0x100092 kqread dhcpleased 4353 29705 1 0 3 0x80 kqread dhcpleased 45961 306686 0 0 3 0x14200 bored smr 929 108101 0 0 2 0x14200 zerothread 84921 206378 0 0 3 0x14200 aiodoned aiodoned 62276 195930 0 0 3 0x14200 syncer update 56083 128973 0 0 3 0x14200 cleaner cleaner 95382 397567 0 0 3 0x14200 reaper reaper 58471 357252 0 0 3 0x14200 pgdaemon pagedaemon 37180 491101 0 0 3 0x14200 bored viomb 48956 282472 0 0 3 0x40014200 acpi0 acpi0 28804 178593 0 0 3 0x40014200 idle1 74909 174974 0 0 3 0x14200 bored softnet 86705 242071 0 0 3 0x14200 bored softnet 96972 160492 0 0 3 0x14200 bored softnet 22216 176419 0 0 3 0x14200 bored softnet 88198 427497 0 0 3 0x14200 bored systqmp 55196 473637 0 0 3 0x14200 bored systq 39345 172574 0 0 3 0x40014200 bored softclock 43756 491629 0 0 3 0x40014200 idle0 1 157824 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 58530 (syz-executor.3) thread 0xffff80002961da48 (440810) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ba6bf0) #0 witness_lock+0x44d #1 vn_ioctl+0x41 sys/kern/vfs_vnops.c:508 #2 sys_ioctl+0x4a2 #3 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #3 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 6618K 6794K 78643K 12379 0 pcb 13 9K 10K 78643K 147 0 rtable 245 8K 9K 78643K 480 0 ifaddr 92 19K 20K 78643K 582 0 counters 60 36K 36K 78643K 190 0 ioctlops 1 1K 4K 78643K 1747 0 iov 0 0K 16K 78643K 118 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1275 80K 80K 78643K 1532 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 15 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 192 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 89K 78643K 1348 0 sigio 0 0K 0K 78643K 13 0 proc 70 91K 128K 78643K 656 0 subproc 104 6K 6K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2 0 in_multi 103 6K 7K 78643K 129 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 4 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 733 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 275 162K 162K 78643K 9666 0 UVM aobj 20 2K 2K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 74 0 NDP 13 0K 1K 78643K 95 0 temp 97 4714K 5736K 78643K 18071 0 kqueue 14 18K 24K 78643K 86 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 187 0 184 4 3 1 3 0 8 0 rtentry 112 136 0 24 4 0 4 4 0 8 0 unpcb 144 1151 0 1134 24 14 10 10 0 8 9 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 183 0 183 2 2 0 2 0 8 0 tcpcb 768 200 0 195 10 9 1 8 0 8 0 arp 120 23 0 4 1 0 1 1 0 8 0 inpcb 368 638 0 629 24 20 4 7 0 8 3 nd6 48 30 0 6 1 0 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 65 0 63 4 3 1 1 0 8 0 pffrag 232 5 0 5 2 1 1 1 0 482 1 pffrnode 88 5 0 5 2 1 1 1 0 8 1 pffrent 40 10 0 10 2 1 1 1 0 8 1 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 716 21 0 21 21 0 8 0 pfrktable 1344 7 0 7 2 2 0 1 0 8 0 pfanchor 1280 19 0 8 2 0 2 2 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 39 0 37 1 0 1 1 0 8 0 pfstkey 120 39 0 37 1 0 1 1 0 8 0 pfstate 336 39 0 37 2 1 1 2 0 8 0 pfrule 1360 102 0 101 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 559 0 100 31 2 29 29 0 8 0 art_table 32 560 0 100 4 0 4 4 0 8 0 art_node 16 135 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semapl 112 190 0 180 1 0 1 1 0 8 0 shmpl 112 20 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3014 0 1577 90 0 90 90 0 8 0 ffsino 272 3014 0 1577 96 0 96 96 0 8 0 nchpl 144 5176 0 3527 63 0 63 63 0 8 0 uvmvnodes 80 3299 0 0 68 0 68 68 0 8 0 vnodes 216 3299 0 0 184 0 184 184 0 8 0 namei 1024 18489 0 18489 5 4 1 2 0 8 1 percpumem 16 107 0 65 1 0 1 1 0 8 0 vcpupl 2048 37 0 0 5 0 5 5 0 8 0 vmpool 568 44 0 7 4 1 3 3 0 8 0 kstatmem 264 150 0 124 2 0 2 2 0 8 0 scxspl 216 14278 0 14278 12 11 1 8 0 8 1 plimitpl 152 103 0 88 1 0 1 1 0 8 0 sigapl 424 1672 0 1602 10 2 8 8 0 8 0 futexpl 64 9765 0 9759 1 0 1 1 0 8 0 knotepl 120 314 0 0 7 0 7 7 0 8 0 kqueuepl 216 131 0 119 1 0 1 1 0 8 0 pipepl 320 322 0 294 12 6 6 8 0 8 3 fdescpl 496 1633 0 1605 5 1 4 5 0 8 0 filepl 152 9236 0 8987 43 25 18 19 0 8 8 lockfpl 104 379 0 376 2 1 1 2 0 8 0 lockfspl 48 82 0 79 1 0 1 1 0 8 0 sessionpl 144 26 0 9 1 0 1 1 0 8 0 pgrppl 48 100 0 83 1 0 1 1 0 8 0 ucredpl 104 645 0 633 1 0 1 1 0 8 0 zombiepl 144 1605 0 1602 2 1 1 1 0 8 0 processpl 1064 1672 0 1602 5 0 5 5 0 8 0 procpl 672 4018 0 3923 14 5 9 9 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 11 0 11 2 2 0 1 0 8 0 sockpl 488 1976 0 1948 98 65 33 34 0 8 29 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 436 0 0 54 0 54 54 0 8 0 mtagpl 96 77 0 0 2 0 2 2 0 8 0 mbufpl 256 482 0 0 29 0 29 29 0 8 0 bufpl 288 5141 0 139 358 0 358 358 0 8 0 anonpl 24 283629 0 269445 111 10 101 102 0 186 0 amapchunkpl 152 26994 0 26305 51 22 29 40 0 158 0 amappl16 200 3405 0 2892 29 1 28 28 0 8 0 amappl15 192 256 0 249 1 0 1 1 0 8 0 amappl14 184 323 0 313 1 0 1 1 0 8 0 amappl13 176 246 0 244 1 0 1 1 0 8 0 amappl12 168 155 0 152 1 0 1 1 0 8 0 amappl11 160 88 0 70 1 0 1 1 0 8 0 amappl10 152 132 0 127 1 0 1 1 0 8 0 amappl9 144 530 0 523 1 0 1 1 0 8 0 amappl8 136 1097 0 1037 3 0 3 3 0 8 0 amappl7 128 606 0 583 1 0 1 1 0 8 0 amappl6 120 261 0 242 2 1 1 2 0 8 0 amappl5 112 1258 0 1241 1 0 1 1 0 8 0 amappl4 104 1074 0 1047 2 1 1 2 0 8 0 amappl3 96 4448 0 4394 2 0 2 2 0 8 0 amappl2 88 659 0 621 2 0 2 2 0 8 0 amappl1 80 42265 0 41580 23 7 16 20 0 8 0 amappl 88 9124 0 8947 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 22 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1678 0 1613 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1678 0 1613 1 0 1 1 0 8 0 vmmpekpl 168 16637 0 16562 4 0 4 4 0 8 0 vmmpepl 168 159957 0 157345 185 38 147 148 0 357 25 vmsppl 368 1677 0 1613 7 0 7 7 0 8 0 rwobjpl 56 43230 0 38335 70 0 70 70 0 8 0 pdppl 4096 3363 0 3263 297 191 106 108 0 8 6 pvpl 32 686843 0 667752 277 106 171 258 0 265 0 pmappl 248 1677 0 1613 5 0 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1019 0 224 23 0 23 23 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff80002e537f6a,ffff80002e53807c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e537f30,ffffd510,7d71,ffff800000c4f26c,ffffd510) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff800021345d28,ffff800000c4f000) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff800021345d28,ffff800000c4f000) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000c4f000,1,ffff80002961da48) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c4f000,1,ffff80002961da48) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8067e41870,82907003,ffff800000c4f000,1,fffffd807f7d7478,ffff80002961da48) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806694ce58,82907003,ffff800000c4f000,ffff80002961da48) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002961da48,ffff800021346078,ffff8000213460c0) at sys_ioctl+0x4a2 syscall(ffff800021346140) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800021346140) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6e49f0044b0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82ba69e8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ba69e8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800027bf49c0) at syscall+0x41d mi_syscall sys/sys/syscall_mi.h:100 [inline] syscall(ffff800027bf49c0) at syscall+0x41d sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff6b10, count: -6