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(ffff8000247840ba,ffff8000247841cc,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800024784080,fffff554,25da,ffff800000d22e80,0) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002b01e918,ffff800000d22c00) at pipex_init_session+0x637 pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002b01e918,ffff800000d22c00) at pipex_init_session+0x637 sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000d22c00,1,ffff8000fffee2a8) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000d22c00,1,ffff8000fffee2a8) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd805a9c71d0,82907003,ffff800000d22c00,1,fffffd807f7d7618,ffff8000fffee2a8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066adc150,82907003,ffff800000d22c00,ffff8000fffee2a8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000fffee2a8,ffff80002b01ec68,ffff80002b01ecb0) at sys_ioctl+0x4a2 syscall(ffff80002b01ed30) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002b01ed30) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4fb2b4c2190, count: -9 ddb{0}> show registers rdi 0xffff8000267e5000 rsi 0 rbp 0xffff80002b01e7a0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x1451981c75579a88 r11 0xdfe000e930a4aa3d r12 0xffff8000247841cc r13 0 r14 0xffff8000247840ba r15 0 rip 0xffffffff81b4bf7f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002b01e740 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor.2) pid=405372 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffefce8,0xffff8000fffeefd8 process=0xffff80002e5b90c0 user=0xffff80002b019000, vmspace=0xfffffd8066d2bbb0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22331 109932 1806 0 2 0 syz-executor.0 22331 377428 1806 0 3 0x4000080 netio syz-executor.0 92656 199787 40439 0 2 0 syz-executor.2 *92656 405372 40439 0 7 0x4000000 syz-executor.2 71289 72378 32774 0 2 0 syz-executor.1 71289 111115 32774 0 3 0x4000080 fsleep syz-executor.1 81402 67202 62527 0 2 0 syz-executor.5 81402 117809 62527 0 3 0x4000080 fsleep syz-executor.5 55212 425999 95266 0 2 0 syz-executor.6 55212 263952 95266 0 3 0x4000080 fsleep syz-executor.6 19834 105877 14297 0 2 0 syz-executor.4 19834 145141 14297 0 3 0x4000080 netio syz-executor.4 19834 454833 14297 0 2 0x4000000 syz-executor.4 95266 346618 71459 0 3 0x82 nanoslp syz-executor.6 14297 366292 71459 0 3 0x82 nanoslp syz-executor.4 62527 488809 71459 0 3 0x82 nanoslp syz-executor.5 32774 29190 71459 0 3 0x82 nanoslp syz-executor.1 40439 289359 71459 0 3 0x82 nanoslp syz-executor.2 1806 176717 71459 0 3 0x82 nanoslp syz-executor.0 4048 296268 71459 0 3 0x82 nanoslp syz-executor.7 48639 133347 0 0 3 0x14200 bored sosplice 35693 426239 71459 0 2 0x2 syz-executor.3 71459 465142 7321 0 3 0x82 thrsleep syz-fuzzer 71459 73227 7321 0 3 0x4000082 nanoslp syz-fuzzer 71459 27818 7321 0 3 0x4000082 wait syz-fuzzer 71459 362959 7321 0 3 0x4000082 wait syz-fuzzer 71459 312604 7321 0 3 0x4000082 thrsleep syz-fuzzer 71459 71431 7321 0 3 0x4000082 wait syz-fuzzer 71459 194682 7321 0 3 0x4000082 thrsleep syz-fuzzer 71459 292708 7321 0 3 0x4000082 thrsleep syz-fuzzer 71459 68797 7321 0 3 0x4000082 thrsleep syz-fuzzer 71459 116205 7321 0 3 0x4000082 wait syz-fuzzer 71459 37854 7321 0 3 0x4000082 wait syz-fuzzer 71459 442060 7321 0 3 0x4000082 nanoslp syz-fuzzer 71459 232977 7321 0 3 0x4000082 kqread syz-fuzzer 71459 261728 7321 0 3 0x4000082 wait syz-fuzzer 71459 322146 7321 0 3 0x4000082 wait syz-fuzzer 71459 49438 7321 0 3 0x4000082 wait syz-fuzzer 7321 138046 40618 0 3 0x10008a sigsusp ksh 40618 100803 6842 0 3 0x9a kqread sshd 84896 197918 1 0 3 0x100083 ttyin getty 6842 341870 1 0 3 0x88 kqread sshd 52038 262498 24424 74 3 0x1100092 bpf pflogd 24424 53850 1 0 3 0x80 netio pflogd 93882 274477 70170 73 3 0x1100090 kqread syslogd 70170 367635 1 0 3 0x100082 netio syslogd 5138 371194 1 0 3 0x100080 kqread resolvd 42121 419273 88198 77 3 0x100092 kqread dhcpleased 27365 414762 88198 77 3 0x100092 kqread dhcpleased 88198 484801 1 0 3 0x80 kqread dhcpleased 86532 55166 0 0 3 0x14200 bored smr 91925 457384 0 0 2 0x14200 zerothread 42931 287230 0 0 3 0x14200 aiodoned aiodoned 29470 431299 0 0 3 0x14200 syncer update 88114 98516 0 0 3 0x14200 cleaner cleaner 94893 151653 0 0 3 0x14200 reaper reaper 518 293883 0 0 3 0x14200 pgdaemon pagedaemon 36860 253517 0 0 3 0x14200 bored viomb 95479 150824 0 0 3 0x40014200 acpi0 acpi0 47736 13968 0 0 7 0x40014200 idle1 3645 332198 0 0 3 0x14200 bored softnet 37689 126972 0 0 3 0x14200 bored softnet 53456 220523 0 0 3 0x14200 bored softnet 28100 454057 0 0 3 0x14200 bored softnet 25793 67196 0 0 3 0x14200 bored systqmp 54685 96307 0 0 3 0x14200 bored systq 86911 334291 0 0 3 0x40014200 bored softclock 8147 503183 0 0 3 0x40014200 idle0 1 523931 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 92656 (syz-executor.2) thread 0xffff8000fffee2a8 (405372) 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 10240 6514K 7123K 78643K 23361 0 pcb 16 18K 28K 78643K 5799 0 rtable 212 16K 18K 78643K 3533 0 ifaddr 110 21K 21K 78643K 1283 0 sysctl 2 0K 0K 78643K 2 0 counters 60 36K 36K 78643K 262 0 ioctlops 1 1K 8K 78643K 2933 0 iov 0 0K 28K 78643K 450 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1377 86K 86K 78643K 5276 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 57 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 2K 78643K 20 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 93K 78643K 6869 0 sigio 0 0K 0K 78643K 375 0 proc 70 91K 128K 78643K 1530 0 subproc 104 6K 6K 78643K 429 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 418 0 in_multi 87 5K 6K 78643K 556 0 ether_multi 1 0K 0K 78643K 39 0 mrt 1 0K 0K 78643K 48 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 2397 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 408 484K 1061K 78643K 41582 0 UVM aobj 100 3K 3K 78643K 100 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 3 0K 1K 78643K 2484 0 NDP 18 0K 1K 78643K 189 0 temp 152 4727K 5758K 78643K 85132 0 kqueue 12 18K 26K 78643K 576 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 120 480 0 476 7 5 2 3 0 8 1 rtentry 112 479 0 391 4 0 4 4 0 8 0 unpcb 144 3571 0 3556 32 31 1 9 0 8 0 syncache 296 25 0 25 7 6 1 1 0 8 1 tcpqe 32 241 0 241 4 4 0 1 0 8 0 tcpcb 768 1876 0 1867 65 62 3 11 0 8 2 arp 120 70 0 56 1 0 1 1 0 8 0 inpcb 368 10868 0 10857 106 97 9 19 0 8 7 nd6 48 112 0 91 1 0 1 1 0 8 0 pkpcb 40 11 0 11 3 3 0 1 0 8 0 kcovpl 48 33 0 25 1 0 1 1 0 8 0 ppxss 1256 46 0 44 9 8 1 1 0 8 0 pfstscr 40 22 0 21 2 1 1 1 0 8 0 pffrag 232 47 0 44 2 1 1 1 0 482 0 pffrnode 88 47 0 44 2 1 1 1 0 8 0 pffrent 40 133 0 130 3 2 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 1056 0 1055 2 1 1 1 0 8 0 pfanchor 1280 89 0 51 4 0 4 4 0 8 0 pftag 88 104 0 102 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 49 0 46 1 0 1 1 0 8 0 pfstkey 120 81 0 78 1 0 1 1 0 8 0 pfstate 336 66 0 63 3 2 1 3 0 8 0 pfrule 1360 309 0 301 5 4 1 3 0 8 0 rttmr 136 13 0 13 4 3 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2310 0 1910 45 16 29 29 0 8 1 art_table 32 2311 0 1910 4 0 4 4 0 8 0 art_node 16 475 0 399 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 7 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 97 0 2 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10453 0 8994 92 0 92 92 0 8 0 ffsino 272 10453 0 8994 98 0 98 98 0 8 0 nchpl 144 19753 0 18103 63 0 63 63 0 8 0 rtmask 32 5 0 5 2 2 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 72708 0 72708 5 4 1 2 0 8 1 percpumem 16 143 0 101 1 0 1 1 0 8 0 vcpupl 2048 31 0 0 4 0 4 4 0 8 0 vmpool 568 76 0 45 3 0 3 3 0 8 0 pfiaddrpl 120 324 0 324 2 2 0 1 0 8 0 kstatmem 264 226 0 190 4 1 3 3 0 8 0 scsiplug 72 17 0 17 4 4 0 1 0 8 0 scxspl 216 55187 0 55187 18 17 1 8 0 8 1 plimitpl 152 1177 0 1162 1 0 1 1 0 8 0 sigapl 424 7141 0 7093 10 3 7 8 0 8 0 futexpl 64 63371 0 63368 1 0 1 1 0 8 0 knotepl 120 770 0 0 17 0 17 17 0 8 0 kqueuepl 216 1334 0 1326 27 26 1 5 0 8 0 pipepl 320 1429 0 1401 31 28 3 8 0 8 0 fdescpl 496 7102 0 7073 7 3 4 5 0 8 0 filepl 152 49043 0 48794 77 62 15 24 0 8 4 lockfpl 104 1762 0 1759 2 1 1 2 0 8 0 lockfspl 48 646 0 643 1 0 1 1 0 8 0 sessionpl 144 49 0 32 1 0 1 1 0 8 0 pgrppl 48 96 0 79 1 0 1 1 0 8 0 ucredpl 104 5751 0 5738 1 0 1 1 0 8 0 zombiepl 144 7094 0 7093 1 0 1 1 0 8 0 processpl 1064 7141 0 7093 5 0 5 5 0 8 0 procpl 672 19418 0 19348 17 9 8 10 0 8 0 srpgc 96 32 0 32 10 9 1 1 0 8 1 sosppl 168 44 0 44 5 4 1 1 0 8 1 sockpl 488 15016 0 14986 247 235 12 33 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 526 0 0 65 3 62 65 0 8 0 mtagpl 96 768 0 0 17 0 17 17 0 8 0 mbufpl 256 1096 0 0 55 0 55 55 0 8 0 bufpl 288 14339 0 8007 453 0 453 453 0 8 0 anonpl 24 1405850 0 1387196 177 55 122 130 0 186 1 amapchunkpl 152 152753 0 151927 409 217 192 349 0 158 158 amappl16 200 20848 0 20264 107 73 34 44 0 8 2 amappl15 192 1148 0 1140 1 0 1 1 0 8 0 amappl14 184 1640 0 1634 1 0 1 1 0 8 0 amappl13 176 1346 0 1344 1 0 1 1 0 8 0 amappl12 168 882 0 876 1 0 1 1 0 8 0 amappl11 160 1646 0 1622 2 0 2 2 0 8 0 amappl10 152 418 0 411 1 0 1 1 0 8 0 amappl9 144 1015 0 1012 1 0 1 1 0 8 0 amappl8 136 1373 0 1268 4 0 4 4 0 8 0 amappl7 128 504 0 480 1 0 1 1 0 8 0 amappl6 120 920 0 906 2 1 1 2 0 8 0 amappl5 112 4411 0 4394 1 0 1 1 0 8 0 amappl4 104 4658 0 4621 4 2 2 2 0 8 0 amappl3 96 22194 0 22138 2 0 2 2 0 8 0 amappl2 88 2115 0 2076 2 0 2 2 0 8 0 amappl1 80 177512 0 176826 20 4 16 20 0 8 0 amappl 88 40464 0 40235 7 1 6 6 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 99 0 0 2 0 2 2 0 8 0 uaddrrnd 24 7178 0 7118 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7178 0 7118 1 0 1 1 0 8 0 vmmpekpl 168 57107 0 57040 4 0 4 4 0 8 0 vmmpepl 168 700776 0 698011 284 152 132 153 0 357 2 vmsppl 368 7177 0 7118 7 1 6 6 0 8 0 rwobjpl 56 177135 0 169392 119 8 111 114 0 8 0 pdppl 4096 14363 0 14267 391 291 100 100 0 8 4 pvpl 32 2733732 0 2711042 292 95 197 252 0 265 1 pmappl 248 7177 0 7118 5 1 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1356 0 428 27 0 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff8000247840ba,ffff8000247841cc,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800024784080,fffff554,25da,ffff800000d22e80,0) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002b01e918,ffff800000d22c00) at pipex_init_session+0x637 pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002b01e918,ffff800000d22c00) at pipex_init_session+0x637 sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000d22c00,1,ffff8000fffee2a8) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000d22c00,1,ffff8000fffee2a8) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd805a9c71d0,82907003,ffff800000d22c00,1,fffffd807f7d7618,ffff8000fffee2a8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8066adc150,82907003,ffff800000d22c00,ffff8000fffee2a8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000fffee2a8,ffff80002b01ec68,ffff80002b01ecb0) at sys_ioctl+0x4a2 syscall(ffff80002b01ed30) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002b01ed30) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4fb2b4c2190, 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 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: -5