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(ffff800022540312,ffff800022540424,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000225402d8,ffff9dae,6c24,ffff800000c3da6c,ffff9dae) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e513df8,ffff800000c3d800) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e513df8,ffff800000c3d800) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000c3d800,1,ffff8000212faa80) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c3d800,1,ffff8000212faa80) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8067ab1010,82907003,ffff800000c3d800,1,fffffd807f7d7410,ffff8000212faa80) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067a277c0,82907003,ffff800000c3d800,ffff8000212faa80) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000212faa80,ffff80002e514148,ffff80002e514190) at sys_ioctl+0x4a2 syscall(ffff80002e514210) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e514210) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x58c60707a20, count: -9 ddb{1}> show registers rdi 0xffff800022540312 rsi 0 rbp 0xffff80002e513c80 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x859d7504b77e02aa r11 0xd21bb6b73c8c675 r12 0xffff800022540424 r13 0 r14 0xffff800022540312 r15 0 rip 0xffffffff814ec96f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e513c20 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> show proc PROC (syz-executor.3) pid=284145 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212fba40,0xffff8000212fad30 process=0xffff8000fffec020 user=0xffff80002e50f000, vmspace=0xfffffd806c7a9468 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88625 317422 74358 60928 3 0x90 nanoslp syz-executor.6 88625 480659 74358 60928 3 0x4000090 netcon2 syz-executor.6 88625 415604 74358 60928 3 0x4000090 fsleep syz-executor.6 88625 482221 74358 60928 3 0x4000090 fsleep syz-executor.6 92979 144296 74613 0 2 0 syz-executor.3 *92979 284145 74613 0 7 0x4000000 syz-executor.3 99300 115642 87183 0 2 0 syz-executor.2 99300 59917 87183 0 3 0x4000080 fsleep syz-executor.2 99300 164798 87183 0 3 0x4000080 fsleep syz-executor.2 51997 441682 64142 0 2 0 syz-executor.5 51997 132690 64142 0 3 0x4000080 fsleep syz-executor.5 72902 56333 6348 0 7 0 syz-executor.1 72902 61965 6348 0 2 0x4000000 syz-executor.1 33825 196051 1183 0 3 0x82 nanoslp syz-executor.7 74613 226096 1183 0 3 0x82 nanoslp syz-executor.3 9989 264105 0 0 3 0x14280 nfsidl nfsio 15979 24172 0 0 3 0x14280 nfsidl nfsio 86325 186255 0 0 3 0x14280 nfsidl nfsio 62145 203202 0 0 3 0x14280 nfsidl nfsio 21509 185926 0 0 3 0x14280 nfsidl nfsio 60012 52488 0 0 3 0x14280 nfsidl nfsio 55249 88881 0 0 3 0x14280 nfsidl nfsio 68638 327330 0 0 3 0x14280 nfsidl nfsio 82702 101500 0 0 3 0x14280 nfsidl nfsio 93073 333488 0 0 3 0x14280 nfsidl nfsio 74423 282222 0 0 3 0x14280 nfsidl nfsio 97449 90785 0 0 3 0x14280 nfsidl nfsio 52260 3630 0 0 3 0x14280 nfsidl nfsio 111 456255 0 0 3 0x14280 nfsidl nfsio 24451 362922 0 0 3 0x14280 nfsidl nfsio 90410 86723 0 0 3 0x14280 nfsidl nfsio 88155 96995 0 0 3 0x14280 nfsidl nfsio 45275 53207 0 0 3 0x14280 nfsidl nfsio 80794 349737 0 0 3 0x14280 nfsidl nfsio 81345 12933 0 0 3 0x14280 nfsidl nfsio 87183 256852 1183 0 3 0x82 nanoslp syz-executor.2 81330 99544 1183 0 3 0x82 nanoslp syz-executor.0 74358 476048 1183 0 3 0x82 nanoslp syz-executor.6 82573 112277 1 0 3 0x100083 ttyin getty 50960 457317 0 0 3 0x14200 bored sosplice 64142 449129 1183 0 3 0x82 nanoslp syz-executor.5 98578 257738 1183 0 2 0x2 syz-executor.4 6348 365705 1183 0 3 0x82 nanoslp syz-executor.1 1183 357065 55011 0 3 0x82 thrsleep syz-fuzzer 1183 330240 55011 0 3 0x4000082 nanoslp syz-fuzzer 1183 189188 55011 0 3 0x4000082 wait syz-fuzzer 1183 271917 55011 0 3 0x4000082 thrsleep syz-fuzzer 1183 220358 55011 0 3 0x4000082 thrsleep syz-fuzzer 1183 420863 55011 0 3 0x4000082 wait syz-fuzzer 1183 394232 55011 0 3 0x4000082 wait syz-fuzzer 1183 483858 55011 0 3 0x4000082 thrsleep syz-fuzzer 1183 471308 55011 0 3 0x4000082 thrsleep syz-fuzzer 1183 79280 55011 0 3 0x4000082 kqread syz-fuzzer 1183 473129 55011 0 3 0x4000082 thrsleep syz-fuzzer 1183 166676 55011 0 3 0x4000082 wait syz-fuzzer 1183 121982 55011 0 3 0x4000082 wait syz-fuzzer 1183 102721 55011 0 3 0x4000082 wait syz-fuzzer 1183 466678 55011 0 3 0x4000082 wait syz-fuzzer 1183 465627 55011 0 3 0x4000082 wait syz-fuzzer 55011 277752 1031 0 3 0x10008a sigsusp ksh 1031 261785 36501 0 3 0x9a kqread sshd 36501 469555 1 0 3 0x88 kqread sshd 11084 299606 71573 74 3 0x1100092 bpf pflogd 71573 182759 1 0 3 0x80 netio pflogd 89583 134581 12663 73 3 0x1100090 kqread syslogd 12663 159594 1 0 3 0x100082 netio syslogd 64540 487342 1 0 3 0x100080 kqread resolvd 11024 164854 13620 77 3 0x100092 kqread dhcpleased 8006 381555 13620 77 3 0x100092 kqread dhcpleased 13620 494043 1 0 3 0x80 kqread dhcpleased 98047 36466 0 0 3 0x14200 bored smr 4164 113654 0 0 2 0x14200 zerothread 12976 138092 0 0 3 0x14200 aiodoned aiodoned 35173 198626 0 0 3 0x14200 syncer update 64264 172489 0 0 3 0x14200 cleaner cleaner 80702 465235 0 0 3 0x14200 reaper reaper 18011 132824 0 0 3 0x14200 pgdaemon pagedaemon 41852 483686 0 0 3 0x14200 bored viomb 74506 206495 0 0 3 0x40014200 acpi0 acpi0 61344 90656 0 0 3 0x40014200 idle1 73449 440640 0 0 3 0x14200 bored softnet 95739 162769 0 0 3 0x14200 bored softnet 62414 377083 0 0 3 0x14200 bored softnet 60494 41855 0 0 3 0x14200 bored softnet 95061 217867 0 0 3 0x14200 bored systqmp 48747 487228 0 0 3 0x14200 bored systq 85603 151198 0 0 3 0x40014200 bored softclock 95779 207762 0 0 3 0x40014200 idle0 1 436562 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 92979 (syz-executor.3) thread 0xffff8000212faa80 (284145) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82aa2ee0) #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 10197 6486K 7000K 78643K 16582 0 pcb 13 11K 12K 78643K 246 0 rtable 229 16K 16K 78643K 1526 0 ifaddr 100 20K 21K 78643K 597 0 sysctl 2 0K 0K 78643K 2 0 counters 60 36K 36K 78643K 162 0 ioctlops 1 1K 4K 78643K 1980 0 iov 0 0K 16K 78643K 276 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1333 83K 83K 78643K 2595 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 35 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 514 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 89K 78643K 3576 0 sigio 0 0K 0K 78643K 73 0 proc 71 91K 115K 78643K 930 0 subproc 104 6K 6K 78643K 238 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 77 0 in_multi 92 6K 6K 78643K 246 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 1 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 1044 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 309 237K 238K 78643K 22798 0 UVM aobj 51 6K 6K 78643K 68 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 77 0 NDP 15 0K 1K 78643K 103 0 temp 139 4726K 38518K 78643K 70205 0 kqueue 12 18K 24K 78643K 153 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 120 147 0 144 1 0 1 1 0 8 0 rtentry 112 241 0 141 4 0 4 4 0 8 0 unpcb 144 1861 0 1844 18 14 4 6 0 8 3 syncache 296 8 0 8 4 4 0 1 0 8 0 tcpqe 32 221 0 221 3 3 0 1 0 8 0 tcpcb 768 508 0 498 27 22 5 8 0 8 3 arp 120 39 0 23 1 0 1 1 0 8 0 inpcb 320 1668 0 1656 32 25 7 7 0 8 6 nd6 48 57 0 36 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 27 0 25 5 4 1 1 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 12 0 11 1 0 1 1 0 482 0 pffrnode 88 12 0 11 1 0 1 1 0 8 0 pffrent 40 46 0 45 1 0 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 375 0 374 3 2 1 1 0 8 0 pfanchor 1280 115 0 103 4 2 2 2 0 8 0 pftag 88 38 0 37 3 2 1 1 0 8 0 pfstitem 24 65 0 63 1 0 1 1 0 8 0 pfstkey 120 71 0 69 1 0 1 1 0 8 0 pfstate 336 68 0 66 4 3 1 3 0 8 0 pfrule 1360 152 0 147 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1042 0 628 31 5 26 30 0 8 0 art_table 32 1043 0 628 4 0 4 4 0 8 0 art_node 16 240 0 150 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 512 0 502 1 0 1 1 0 8 0 shmpl 112 65 0 17 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5637 0 4183 92 0 92 92 0 8 0 ffsino 272 5637 0 4183 98 0 98 98 0 8 0 nchpl 144 10141 0 8489 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 1 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 34692 0 34692 2 1 1 2 0 8 1 percpumem 16 93 0 51 1 0 1 1 0 8 0 vcpupl 2048 11 0 0 2 0 2 2 0 8 0 vmpool 568 25 0 14 1 0 1 1 0 8 0 pfiaddrpl 120 111 0 111 2 2 0 1 0 8 0 kstatmem 264 130 0 100 4 1 3 3 0 8 1 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 30466 0 30466 15 14 1 8 0 8 1 plimitpl 152 270 0 254 1 0 1 1 0 8 0 sigapl 424 3890 0 3822 10 2 8 8 0 8 0 futexpl 64 36858 0 36853 1 0 1 1 0 8 0 knotepl 120 423 0 0 11 0 11 11 0 8 0 kqueuepl 216 774 0 766 7 4 3 5 0 8 2 pipepl 320 1183 0 1155 22 16 6 8 0 8 3 fdescpl 496 3852 0 3824 5 0 5 5 0 8 0 filepl 152 21602 0 21350 36 20 16 19 0 8 5 lockfpl 104 316 0 314 1 0 1 1 0 8 0 lockfspl 48 140 0 138 1 0 1 1 0 8 0 sessionpl 144 35 0 18 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 1920 0 1907 1 0 1 1 0 8 0 zombiepl 144 3824 0 3822 1 0 1 1 0 8 0 processpl 1064 3890 0 3822 5 0 5 5 0 8 0 procpl 672 10030 0 9939 13 4 9 9 0 8 0 srpgc 96 8 0 8 3 3 0 1 0 8 0 sosppl 168 22 0 20 4 3 1 1 0 8 0 sockpl 488 3682 0 3650 102 90 12 29 0 8 8 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 1 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 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 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 345 0 0 43 1 42 43 0 8 0 mtagpl 96 344 0 0 9 0 9 9 0 8 0 mbufpl 256 630 0 0 36 0 36 36 0 8 0 bufpl 288 9944 0 3612 453 0 453 453 0 8 0 anonpl 24 724983 0 707439 157 29 128 130 0 186 16 amapchunkpl 152 62870 0 62076 37 3 34 35 0 158 0 amappl16 200 9906 0 9361 60 24 36 42 0 8 6 amappl15 192 143 0 137 1 0 1 1 0 8 0 amappl14 184 156 0 150 1 0 1 1 0 8 0 amappl13 176 603 0 598 1 0 1 1 0 8 0 amappl12 168 739 0 733 2 1 1 1 0 8 0 amappl11 160 1006 0 984 2 0 2 2 0 8 1 amappl10 152 150 0 144 1 0 1 1 0 8 0 amappl9 144 1121 0 1114 1 0 1 1 0 8 0 amappl8 136 1248 0 1167 3 0 3 3 0 8 0 amappl7 128 589 0 567 1 0 1 1 0 8 0 amappl6 120 919 0 904 2 1 1 2 0 8 0 amappl5 112 2164 0 2149 1 0 1 1 0 8 0 amappl4 104 2839 0 2805 2 0 2 2 0 8 0 amappl3 96 12369 0 12310 2 0 2 2 0 8 0 amappl2 88 1655 0 1612 2 0 2 2 0 8 0 amappl1 80 96473 0 95805 20 4 16 20 0 8 0 amappl 88 21631 0 21435 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 67 0 17 1 0 1 1 0 8 0 uaddrrnd 24 3877 0 3838 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3877 0 3838 1 0 1 1 0 8 0 vmmpekpl 168 34642 0 34587 3 0 3 3 0 8 0 vmmpepl 168 378391 0 375812 165 38 127 133 0 357 2 vmsppl 368 3876 0 3838 4 0 4 4 0 8 0 rwobjpl 56 98897 0 91295 111 2 109 110 0 8 0 pdppl 4096 7761 0 7687 257 177 80 81 0 8 6 pvpl 32 1467864 0 1446577 310 101 209 258 0 265 25 pmappl 248 3876 0 3838 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1048 0 194 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82948ff0) 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(ffffffff82aa2cd8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82aa2cd8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x31 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x31 sys/dev/kcov.c:225 syscall(ffff800026181f80) at syscall+0x594 mi_syscall_return sys/sys/syscall_mi.h:128 [inline] syscall(ffff800026181f80) at syscall+0x594 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffef660, count: -9 ddb{0}> machine ddbcpu 1 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> trace rc4_keysetup(ffff800022540312,ffff800022540424,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000225402d8,ffff9dae,6c24,ffff800000c3da6c,ffff9dae) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e513df8,ffff800000c3d800) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e513df8,ffff800000c3d800) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000c3d800,1,ffff8000212faa80) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000c3d800,1,ffff8000212faa80) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8067ab1010,82907003,ffff800000c3d800,1,fffffd807f7d7410,ffff8000212faa80) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8067a277c0,82907003,ffff800000c3d800,ffff8000212faa80) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000212faa80,ffff80002e514148,ffff80002e514190) at sys_ioctl+0x4a2 syscall(ffff80002e514210) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e514210) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x58c60707a20, count: -9