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(ffff80002e4cc442,ffff80002e4cc554,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e4cc408,ffffb309,3670,ffff8000006d766c,ffffb309) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e4766a8,ffff8000006d7400) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e4766a8,ffff8000006d7400) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff8000006d7400,1,ffff80002962ed20) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff8000006d7400,1,ffff80002962ed20) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd805bc88530,82907003,ffff8000006d7400,1,fffffd807f7d70d0,ffff80002962ed20) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069581578,82907003,ffff8000006d7400,ffff80002962ed20) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002962ed20,ffff80002e4769f8,ffff80002e476a40) at sys_ioctl+0x4a2 syscall(ffff80002e476ac0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e476ac0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x263f9a226c0, count: -9 ddb{0}> show registers rdi 0xffff80002b641000 rsi 0 rbp 0xffff80002e476530 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x501d2fa28f30d23b r11 0xc467e8749e2238d r12 0xffff80002e4cc554 r13 0 r14 0xffff80002e4cc442 r15 0 rip 0xffffffff81b4bf7f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e4764d0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor.0) pid=312633 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff80002962e540,0xffff8000fffef518 process=0xffff80002e5094e8 user=0xffff80002e471000, vmspace=0xfffffd8065a06450 estcpu=35, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42479 481841 98507 0 2 0 syz-executor.5 8176 216053 59863 0 7 0 syz-executor.3 87529 390772 40256 0 2 0 syz-executor.0 *87529 312633 40256 0 7 0x4000000 syz-executor.0 97780 467797 96363 0 2 0 syz-executor.6 97780 507859 96363 0 3 0x4000080 fsleep syz-executor.6 9431 290673 12271 0 2 0 syz-executor.2 9431 21359 12271 0 3 0x4000080 fsleep syz-executor.2 9431 518830 12271 0 2 0x4000000 syz-executor.2 9431 262302 12271 0 2 0x4000000 syz-executor.2 9431 324719 12271 0 2 0x4000000 syz-executor.2 9431 453564 12271 0 2 0x4000000 syz-executor.2 9431 226819 12271 0 2 0x4000000 syz-executor.2 9431 26955 12271 0 2 0x4000000 syz-executor.2 5401 456022 73451 0 2 0 syz-executor.1 5401 109100 73451 0 3 0x4000080 ttyin syz-executor.1 40256 290231 12672 0 3 0x82 nanoslp syz-executor.0 52990 177252 12672 0 3 0x82 piperd syz-executor.7 98507 277158 12672 0 3 0x82 nanoslp syz-executor.5 36911 402670 12672 0 3 0x82 nanoslp syz-executor.4 73451 451320 12672 0 3 0x82 nanoslp syz-executor.1 12271 386226 12672 0 2 0x482 syz-executor.2 96363 334398 12672 0 3 0x82 nanoslp syz-executor.6 59863 433320 12672 0 3 0x82 nanoslp syz-executor.3 54073 16702 1 0 3 0x100083 ttyopn getty 24735 200088 0 0 3 0x14200 bored sosplice 12672 495954 99424 0 3 0x82 kqread syz-fuzzer 12672 464232 99424 0 3 0x4000082 nanoslp syz-fuzzer 12672 100130 99424 0 3 0x4000082 wait syz-fuzzer 12672 520344 99424 0 3 0x4000082 wait syz-fuzzer 12672 510051 99424 0 3 0x4000082 wait syz-fuzzer 12672 197124 99424 0 3 0x4000082 thrsleep syz-fuzzer 12672 408618 99424 0 3 0x4000082 thrsleep syz-fuzzer 12672 246963 99424 0 3 0x4000082 wait syz-fuzzer 12672 449535 99424 0 3 0x4000082 thrsleep syz-fuzzer 12672 227126 99424 0 3 0x4000082 thrsleep syz-fuzzer 12672 464665 99424 0 3 0x4000082 wait syz-fuzzer 12672 236078 99424 0 3 0x4000082 wait syz-fuzzer 12672 359860 99424 0 2 0x4000482 syz-fuzzer 12672 260182 99424 0 3 0x4000082 thrsleep syz-fuzzer 12672 442691 99424 0 3 0x4000082 wait syz-fuzzer 12672 402447 99424 0 3 0x4000082 wait syz-fuzzer 99424 242197 65022 0 3 0x10008a sigsusp ksh 65022 389694 65671 0 3 0x9a kqread sshd 65671 160269 1 0 3 0x88 kqread sshd 68398 228891 56406 74 3 0x1100092 bpf pflogd 56406 240267 1 0 3 0x80 netio pflogd 69525 212911 94555 73 3 0x1100090 kqread syslogd 94555 104696 1 0 3 0x100082 netio syslogd 49302 205140 1 0 3 0x100080 kqread resolvd 67765 115789 2595 77 3 0x100092 kqread dhcpleased 16440 508830 2595 77 3 0x100092 kqread dhcpleased 2595 327840 1 0 3 0x80 kqread dhcpleased 69388 107949 0 0 3 0x14200 bored smr 27869 91105 0 0 2 0x14200 zerothread 53338 301732 0 0 3 0x14200 aiodoned aiodoned 51400 481749 0 0 3 0x14200 syncer update 3895 4675 0 0 3 0x14200 cleaner cleaner 86675 7764 0 0 3 0x14200 reaper reaper 62846 52981 0 0 3 0x14200 pgdaemon pagedaemon 25490 2778 0 0 3 0x14200 bored viomb 54314 250831 0 0 3 0x40014200 acpi0 acpi0 76112 421084 0 0 3 0x40014200 idle1 52177 77322 0 0 3 0x14200 bored softnet 34051 338880 0 0 3 0x14200 bored softnet 46329 47560 0 0 3 0x14200 bored softnet 70392 294034 0 0 3 0x14200 bored softnet 87004 297753 0 0 3 0x14200 bored systqmp 7817 127157 0 0 3 0x14200 bored systq 65386 76241 0 0 3 0x40014200 bored softclock 57867 77903 0 0 3 0x40014200 idle0 1 173273 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 87529 (syz-executor.0) thread 0xffff80002962ed20 (312633) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82afcd50) #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 10251 6541K 8262K 78643K 79404 0 pcb 13 20K 24K 78643K 4116 0 rtable 225 21K 22K 78643K 6117 0 ifaddr 125 30K 31K 78643K 2613 0 sysctl 3 1K 3K 78643K 85 0 counters 60 36K 36K 78643K 1328 0 ioctlops 1 1K 6K 78643K 17296 0 iov 0 0K 32K 78643K 5229 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1841 115K 115K 78643K 22875 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 382 0 VM map 2 1K 1K 78643K 2 0 sem 18 17K 27K 78643K 1339 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 85K 78643K 33388 0 sigio 0 0K 0K 78643K 620 0 proc 72 91K 140K 78643K 5471 0 subproc 104 6K 6K 78643K 1645 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1448 0 in_multi 79 5K 7K 78643K 2071 0 ether_multi 1 0K 0K 78643K 235 0 mrt 1 0K 0K 78643K 123 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 235 1049K 1049K 78643K 235 0 exec 0 0K 2K 78643K 8232 0 pfkey data 0 0K 0K 78643K 15 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 662 1889K 1905K 78643K 202044 0 UVM aobj 134 4K 4K 78643K 140 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2249 0 NDP 19 0K 2K 78643K 772 0 temp 155 4727K 70263K 78643K 526333 0 kqueue 12 18K 28K 78643K 2444 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 3087 0 3084 42 41 1 5 0 8 0 rtentry 112 1963 0 1883 4 1 3 4 0 8 0 unpcb 144 20743 0 20728 212 211 1 10 0 8 0 syncache 296 36 0 36 12 12 0 1 0 8 0 tcpqe 32 14 0 14 4 4 0 1 0 8 0 tcpcb 768 11246 0 11241 403 402 1 17 0 8 0 arp 120 282 0 268 1 0 1 1 0 8 0 inpcb 368 28101 0 27947 413 398 15 24 0 8 0 nd6 48 433 0 412 1 0 1 1 0 8 0 pkpcb 40 183 0 183 32 32 0 1 0 8 0 kcovpl 48 125 0 117 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 410 0 408 50 49 1 1 0 8 0 pfstscr 40 9 0 4 1 0 1 1 0 8 0 pffrag 232 96 0 95 11 10 1 1 0 482 0 pffrnode 88 96 0 95 11 10 1 1 0 8 0 pffrent 40 515 0 514 11 10 1 1 0 8 0 pfosfp 40 1433 0 1008 5 0 5 5 0 8 0 pfosfpen 112 1433 0 717 21 0 21 21 0 8 0 pfrktable 1344 38 0 31 2 1 1 1 0 8 0 pfanchor 1280 95 0 22 7 0 7 7 0 8 0 pftag 88 9 0 1 1 0 1 1 0 8 0 pfstitem 24 74 0 67 1 0 1 1 0 8 0 pfstkey 120 78 0 75 2 1 1 2 0 8 0 pfstate 336 78 0 71 4 1 3 4 0 8 0 pfrule 1360 160 0 126 6 3 3 3 0 8 0 rttmr 136 31 0 31 11 11 0 1 0 8 0 art_heap8 4096 3 0 2 2 1 1 2 0 8 0 art_heap4 256 8442 0 8097 62 39 23 30 0 8 0 art_table 32 8445 0 8099 4 1 3 4 0 8 0 art_node 16 1803 0 1735 1 0 1 1 0 8 0 semupl 112 5 0 5 2 2 0 1 0 8 0 semapl 112 1324 0 1308 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 44851 0 43298 98 0 98 98 0 8 0 ffsino 272 44851 0 43298 104 0 104 104 0 8 0 nchpl 144 88952 0 87300 63 0 63 63 0 8 0 rtmask 32 27 0 27 11 11 0 1 0 8 0 uvmvnodes 80 8641 0 0 177 0 177 177 0 8 0 vnodes 216 8641 0 0 481 0 481 481 0 8 0 namei 1024 345276 0 345276 9 8 1 2 0 8 1 percpumem 16 676 0 634 1 0 1 1 0 8 0 vcpupl 2048 428 0 0 54 0 54 54 0 8 0 vmpool 568 489 0 61 31 0 31 31 0 8 0 pfiaddrpl 120 25 0 14 2 1 1 1 0 8 0 kstatmem 264 972 0 934 5 2 3 3 0 8 0 scsiplug 72 81 0 81 25 25 0 1 0 8 0 scxspl 216 258858 0 258858 78 77 1 8 0 8 1 plimitpl 152 3874 0 3858 1 0 1 1 0 8 0 sigapl 424 33494 0 33446 9 2 7 8 0 8 0 futexpl 64 317486 0 317484 5 4 1 1 0 8 0 knotepl 120 1926 0 0 17 0 17 17 0 8 0 kqueuepl 216 6255 0 6247 110 109 1 8 0 8 0 pipepl 320 5070 0 5042 109 106 3 8 0 8 0 fdescpl 496 33451 0 33422 8 4 4 5 0 8 0 filepl 152 234311 0 234063 297 286 11 21 0 8 0 lockfpl 104 9414 0 9412 21 20 1 2 0 8 0 lockfspl 48 2608 0 2606 1 0 1 1 0 8 0 sessionpl 144 145 0 128 1 0 1 1 0 8 0 pgrppl 48 397 0 380 1 0 1 1 0 8 0 ucredpl 104 27940 0 27925 1 0 1 1 0 8 0 zombiepl 144 33447 0 33446 2 1 1 1 0 8 0 processpl 1064 33494 0 33446 5 0 5 5 0 8 0 procpl 672 98272 0 98199 24 15 9 10 0 8 0 srpgc 96 169 0 169 45 45 0 1 0 8 0 sosppl 168 264 0 264 49 49 0 1 0 8 0 sockpl 488 52145 0 51973 982 960 22 42 0 8 0 mcl64k 65536 59 0 0 3 1 2 3 0 8 0 mcl16k 16384 33 0 0 5 2 3 3 0 8 0 mcl12k 12288 58 0 0 3 1 2 2 0 8 0 mcl9k 9216 31 0 0 2 0 2 2 0 8 0 mcl8k 8192 36 0 0 4 1 3 3 0 8 0 mcl4k 4096 57 0 0 4 1 3 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 773 0 0 58 37 21 58 0 8 0 mtagpl 96 1680 0 0 21 1 20 21 0 8 0 mbufpl 256 8055 0 0 452 0 452 452 0 8 0 bufpl 288 63233 0 54592 618 0 618 618 0 8 0 anonpl 24 6573658 0 6554407 431 293 138 166 0 186 0 amapchunkpl 152 628370 0 627542 485 444 41 346 0 158 5 amappl16 200 89682 0 88928 310 266 44 63 0 8 0 amappl15 192 8841 0 8832 1 0 1 1 0 8 0 amappl14 184 4380 0 4366 1 0 1 1 0 8 0 amappl13 176 4453 0 4451 1 0 1 1 0 8 0 amappl12 168 2517 0 2513 2 1 1 1 0 8 0 amappl11 160 3352 0 3333 2 0 2 2 0 8 0 amappl10 152 5336 0 5324 1 0 1 1 0 8 0 amappl9 144 5073 0 5067 1 0 1 1 0 8 0 amappl8 136 5526 0 5362 6 0 6 6 0 8 0 amappl7 128 3015 0 2989 2 1 1 2 0 8 0 amappl6 120 5655 0 5628 2 1 1 2 0 8 0 amappl5 112 30818 0 30798 1 0 1 1 0 8 0 amappl4 104 10746 0 10707 3 1 2 2 0 8 0 amappl3 96 105210 0 105156 2 0 2 2 0 8 0 amappl2 88 8047 0 7997 5 3 2 2 0 8 0 amappl1 80 834267 0 833609 20 4 16 20 0 8 0 amappl 88 198736 0 198434 10 2 8 8 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 33941 0 33484 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 33941 0 33484 3 0 3 3 0 8 0 vmmpekpl 168 241195 0 241079 6 0 6 6 0 8 0 vmmpepl 168 3291623 0 3288058 456 285 171 177 0 357 0 vmsppl 368 33940 0 33484 43 1 42 42 0 8 0 rwobjpl 56 812076 0 801272 205 50 155 157 0 8 0 pdppl 4096 67889 0 67396 1860 1363 497 497 0 8 4 pvpl 32 12842659 0 12822192 783 585 198 259 0 265 0 pmappl 248 33940 0 33484 29 0 29 29 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3856 0 1907 56 0 56 56 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff80002e4cc442,ffff80002e4cc554,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002e4cc408,ffffb309,3670,ffff8000006d766c,ffffb309) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e4766a8,ffff8000006d7400) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e4766a8,ffff8000006d7400) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff8000006d7400,1,ffff80002962ed20) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff8000006d7400,1,ffff80002962ed20) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd805bc88530,82907003,ffff8000006d7400,1,fffffd807f7d70d0,ffff80002962ed20) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069581578,82907003,ffff8000006d7400,ffff80002962ed20) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002962ed20,ffff80002e4769f8,ffff80002e476a40) at sys_ioctl+0x4a2 syscall(ffff80002e476ac0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e476ac0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x263f9a226c0, 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(ffffffff82afcb48) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82afcb48) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff80002e49e310) at syscall+0x41d mi_syscall sys/sys/syscall_mi.h:100 [inline] syscall(ffff80002e49e310) at syscall+0x41d sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc1d00, count: -6