kernel: integer divide fault trap, code=0 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace rc4_keysetup(ffff8000261b71f2,ffff8000261b7304,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000261b71b8,fffff325,7927,ffff800000cea66c,fffff325) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e473c78,ffff800000cea400) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e473c78,ffff800000cea400) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000cea400,1,ffff80002de667f0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000cea400,1,ffff80002de667f0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807af2caf8,82907003,ffff800000cea400,1,fffffd807f7d72d8,ffff80002de667f0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e5d5d20,82907003,ffff800000cea400,ffff80002de667f0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002de667f0,ffff80002e473fc8,ffff80002e474010) at sys_ioctl+0x4a2 syscall(ffff80002e474090) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e474090) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d6a2e4930, count: -9 ddb{1}> show registers rdi 0xffff80002477f000 rsi 0 rbp 0xffff80002e473b00 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0xfa55245c18870c98 r11 0xe9163182963947cf r12 0xffff8000261b7304 r13 0 r14 0xffff8000261b71f2 r15 0 rip 0xffffffff81c3ca2f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e473aa0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> show proc PROC (syz-executor.1) pid=177353 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80002de66010,0xffff80002de67280 process=0xffff8000fffe8448 user=0xffff80002e46f000, vmspace=0xfffffd80653108d0 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 42988 350227 32979 0 2 0 syz-executor.3 42988 306048 32979 0 2 0x4000080 syz-executor.3 42988 329611 32979 0 3 0x4000080 fsleep syz-executor.3 16257 275807 29870 0 7 0 syz-executor.1 *16257 177353 29870 0 7 0x4000000 syz-executor.1 46333 137161 3938 0 2 0 syz-executor.2 46333 361502 3938 0 2 0x4000000 syz-executor.2 95734 256691 0 0 3 0x14280 nfsidl nfsio 71828 479336 0 0 3 0x14280 nfsidl nfsio 51585 287199 0 0 3 0x14280 nfsidl nfsio 36567 328910 0 0 3 0x14280 nfsidl nfsio 79987 506571 0 0 3 0x14280 nfsidl nfsio 79541 114768 0 0 3 0x14280 nfsidl nfsio 42644 61867 0 0 3 0x14280 nfsidl nfsio 27848 11811 0 0 3 0x14280 nfsidl nfsio 83249 413358 0 0 3 0x14280 nfsidl nfsio 48393 252085 0 0 3 0x14280 nfsidl nfsio 39636 514016 0 0 3 0x14280 nfsidl nfsio 62156 32483 0 0 3 0x14280 nfsidl nfsio 2219 399673 0 0 3 0x14280 nfsidl nfsio 75565 21021 0 0 3 0x14280 nfsidl nfsio 68256 97469 0 0 3 0x14280 nfsidl nfsio 44402 337926 0 0 3 0x14280 nfsidl nfsio 95664 105656 0 0 3 0x14280 nfsidl nfsio 69138 489111 0 0 3 0x14280 nfsidl nfsio 64692 218677 0 0 3 0x14280 nfsidl nfsio 32584 396814 0 0 3 0x14280 nfsidl nfsio 79695 25463 1 0 3 0x100083 ttyin getty 61943 238742 0 0 3 0x14200 bored sosplice 38432 27652 59898 0 3 0x82 piperd syz-executor.6 32979 166556 59898 0 3 0x82 nanoslp syz-executor.3 29870 478579 59898 0 3 0x82 nanoslp syz-executor.1 3938 183608 59898 0 3 0x82 nanoslp syz-executor.2 59898 161691 35102 0 3 0x82 thrsleep syz-fuzzer 59898 55354 35102 0 3 0x4000082 nanoslp syz-fuzzer 59898 115779 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 286975 35102 0 3 0x4000082 wait syz-fuzzer 59898 417343 35102 0 3 0x4000082 wait syz-fuzzer 59898 378421 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 285853 35102 0 3 0x4000082 wait syz-fuzzer 59898 309851 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 363116 35102 0 3 0x4000082 kqread syz-fuzzer 59898 327160 35102 0 2 0x4000002 syz-fuzzer 59898 320314 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 239665 35102 0 3 0x4000082 wait syz-fuzzer 59898 430039 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 515168 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 40720 35102 0 3 0x4000082 thrsleep syz-fuzzer 59898 305530 35102 0 3 0x4000082 thrsleep syz-fuzzer 35102 314013 67947 0 3 0x10008a sigsusp ksh 67947 295370 67394 0 3 0x9a kqread sshd 67394 513038 1 0 3 0x88 kqread sshd 82052 132937 44301 74 3 0x1100092 bpf pflogd 44301 27264 1 0 3 0x80 netio pflogd 3568 48862 52220 73 3 0x1100090 kqread syslogd 52220 166403 1 0 3 0x100082 netio syslogd 96895 231457 1 0 3 0x100080 kqread resolvd 12051 416156 4176 77 3 0x100092 kqread dhcpleased 2870 324413 4176 77 3 0x100092 kqread dhcpleased 4176 15190 1 0 3 0x80 kqread dhcpleased 33878 239892 0 0 3 0x14200 bored smr 49678 123444 0 0 2 0x14200 zerothread 59387 462218 0 0 3 0x14200 aiodoned aiodoned 40731 168826 0 0 3 0x14200 syncer update 28036 249813 0 0 3 0x14200 cleaner cleaner 42056 215749 0 0 3 0x14200 reaper reaper 58620 254394 0 0 3 0x14200 pgdaemon pagedaemon 63570 99443 0 0 3 0x14200 bored viomb 94235 28940 0 0 3 0x40014200 acpi0 acpi0 35411 158051 0 0 3 0x40014200 idle1 20724 266759 0 0 3 0x14200 bored softnet 53069 248090 0 0 3 0x14200 bored softnet 3639 439648 0 0 3 0x14200 bored softnet 74578 418124 0 0 3 0x14200 bored softnet 83614 500307 0 0 3 0x14200 bored systqmp 63312 16297 0 0 3 0x14200 bored systq 99852 63545 0 0 3 0x40014200 bored softclock 88538 284691 0 0 3 0x40014200 idle0 1 181833 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 16257 (syz-executor.1) thread 0xffff80002de667f0 (177353) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829f36e0) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 6623K 7027K 78643K 16561 0 pcb 13 11K 12K 78643K 365 0 rtable 147 16K 22K 78643K 552 0 ifaddr 66 14K 20K 78643K 303 0 sysctl 3 1K 1K 78643K 8 0 counters 50 34K 36K 78643K 118 0 ioctlops 1 1K 8K 78643K 2032 0 iov 0 0K 16K 78643K 364 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1400 87K 88K 78643K 2525 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 270 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 9 29K 85K 78643K 2123 0 sigio 0 0K 0K 78643K 17 0 proc 70 91K 128K 78643K 658 0 subproc 52 3K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 256 0 in_multi 48 3K 7K 78643K 182 0 ether_multi 1 0K 0K 78643K 18 0 mrt 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 127 572K 572K 78643K 127 0 exec 0 0K 2K 78643K 1063 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 304 378K 427K 78643K 14570 0 UVM aobj 63 6K 6K 78643K 63 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 91 0 NDP 9 0K 2K 78643K 65 0 temp 99 4724K 5750K 78643K 19325 0 kqueue 12 18K 28K 78643K 214 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 140 0 137 3 2 1 3 0 8 0 rtentry 112 141 0 85 4 0 4 4 0 8 0 unpcb 144 1399 0 1381 15 9 6 6 0 8 5 syncache 296 16 0 16 4 4 0 1 0 8 0 tcpqe 32 238 0 238 3 3 0 1 0 8 0 tcpcb 768 779 0 771 24 21 3 12 0 8 1 arp 120 20 0 12 1 0 1 1 0 8 0 inpcb 368 1923 0 1913 17 15 2 10 0 8 1 nd6 48 31 0 22 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 9 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 14 0 12 3 2 1 1 0 8 0 pfstscr 40 10 0 10 2 1 1 1 0 8 1 pffrag 232 6 0 3 1 0 1 1 0 482 0 pffrnode 88 6 0 3 1 0 1 1 0 8 0 pffrent 40 16 0 13 1 0 1 1 0 8 0 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 52 0 45 3 1 2 2 0 8 1 pfanchor 1280 25 0 9 3 1 2 2 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 67 0 48 1 0 1 1 0 8 0 pfstkey 120 78 0 63 2 1 1 2 0 8 0 pfstate 336 71 0 55 3 0 3 3 0 8 0 pfrule 1360 152 0 116 6 2 4 4 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 612 0 381 29 3 26 29 0 8 7 art_table 32 613 0 381 4 0 4 4 0 8 0 art_node 16 140 0 90 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 263 0 253 1 0 1 1 0 8 0 shmpl 112 60 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4187 0 2762 91 0 91 91 0 8 0 ffsino 272 4187 0 2762 97 0 97 97 0 8 0 nchpl 144 7328 0 5707 63 0 63 63 0 8 0 uvmvnodes 80 5150 0 0 106 0 106 106 0 8 0 vnodes 216 5150 0 0 287 0 287 287 0 8 0 namei 1024 29139 0 29139 2 1 1 2 0 8 1 percpumem 16 71 0 34 1 0 1 1 0 8 0 vcpupl 2048 31 0 0 4 0 4 4 0 8 0 vmpool 568 70 0 39 3 0 3 3 0 8 0 pfiaddrpl 120 29 0 11 2 1 1 1 0 8 0 kstatmem 264 86 0 68 2 0 2 2 0 8 0 scxspl 216 20531 0 20531 14 11 3 8 0 8 3 plimitpl 152 208 0 197 1 0 1 1 0 8 0 sigapl 424 2446 0 2386 11 3 8 8 0 8 0 futexpl 64 18508 0 18507 1 0 1 1 0 8 0 knotepl 120 386 0 0 11 0 11 11 0 8 0 kqueuepl 216 502 0 494 9 8 1 5 0 8 0 pipepl 320 916 0 900 17 14 3 11 0 8 0 fdescpl 496 2408 0 2386 6 2 4 5 0 8 1 filepl 152 17615 0 17452 30 15 15 19 0 8 5 lockfpl 104 361 0 359 1 0 1 1 0 8 0 lockfspl 48 150 0 148 1 0 1 1 0 8 0 sessionpl 144 26 0 13 1 0 1 1 0 8 0 pgrppl 48 31 0 18 1 0 1 1 0 8 0 ucredpl 104 2014 0 2000 1 0 1 1 0 8 0 zombiepl 144 2386 0 2386 2 1 1 1 0 8 1 processpl 1064 2446 0 2386 5 0 5 5 0 8 0 procpl 672 6529 0 6450 12 3 9 9 0 8 1 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 12 0 12 3 3 0 1 0 8 0 sockpl 488 3465 0 3434 54 42 12 21 0 8 8 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 382 0 0 47 0 47 47 0 8 0 mtagpl 96 416 0 0 11 0 11 11 0 8 0 mbufpl 256 747 0 0 45 0 45 45 0 8 0 bufpl 288 6860 0 528 453 0 453 453 0 8 0 anonpl 24 474790 0 460411 171 41 130 136 0 186 13 amapchunkpl 152 46683 0 46011 54 12 42 45 0 158 9 amappl16 200 7501 0 6949 70 33 37 44 0 8 6 amappl15 192 508 0 501 1 0 1 1 0 8 0 amappl14 184 31 0 27 1 0 1 1 0 8 0 amappl13 176 88 0 86 1 0 1 1 0 8 0 amappl12 168 520 0 514 1 0 1 1 0 8 0 amappl11 160 442 0 423 2 0 2 2 0 8 1 amappl10 152 506 0 503 1 0 1 1 0 8 0 amappl9 144 509 0 504 1 0 1 1 0 8 0 amappl8 136 939 0 867 3 0 3 3 0 8 0 amappl7 128 393 0 372 1 0 1 1 0 8 0 amappl6 120 226 0 212 2 1 1 2 0 8 0 amappl5 112 2011 0 1995 1 0 1 1 0 8 0 amappl4 104 1367 0 1338 3 2 1 2 0 8 0 amappl3 96 7314 0 7268 3 1 2 2 0 8 0 amappl2 88 1052 0 1014 2 1 1 2 0 8 0 amappl1 80 61782 0 61211 20 4 16 20 0 8 0 amappl 88 13964 0 13787 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 62 0 0 2 0 2 2 0 8 0 uaddrrnd 24 2478 0 2425 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2478 0 2425 1 0 1 1 0 8 0 vmmpekpl 168 26113 0 26065 4 0 4 4 0 8 0 vmmpepl 168 236910 0 234668 159 26 133 136 0 357 9 vmsppl 368 2477 0 2425 7 1 6 6 0 8 0 rwobjpl 56 66382 0 59667 99 2 97 97 0 8 0 pdppl 4096 4963 0 4881 170 70 100 101 0 8 18 pvpl 32 976934 0 958578 276 63 213 237 0 265 25 pmappl 248 2477 0 2425 4 0 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 990 0 96 26 0 26 26 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8296bff0) 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 end of kernel end trace frame: 0x7f7fffff1d50, count: -3 ddb{0}> machine ddbcpu 1 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> trace rc4_keysetup(ffff8000261b71f2,ffff8000261b7304,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000261b71b8,fffff325,7927,ffff800000cea66c,fffff325) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e473c78,ffff800000cea400) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e473c78,ffff800000cea400) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000cea400,1,ffff80002de667f0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000cea400,1,ffff80002de667f0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807af2caf8,82907003,ffff800000cea400,1,fffffd807f7d72d8,ffff80002de667f0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e5d5d20,82907003,ffff800000cea400,ffff80002de667f0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002de667f0,ffff80002e473fc8,ffff80002e474010) at sys_ioctl+0x4a2 syscall(ffff80002e474090) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e474090) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d6a2e4930, count: -9