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(ffff8000261c5e1a,ffff8000261c5f2c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000261c5de0,3409,b81,ffff800000d24e6c,3409) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e4762c8,ffff800000d24c00) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e4762c8,ffff800000d24c00) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d24c00,1,ffff80002129cd30) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d24c00,1,ffff80002129cd30) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8066f44a38,82907003,ffff800000d24c00,1,fffffd807f7d7068,ffff80002129cd30) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8071263270,82907003,ffff800000d24c00,ffff80002129cd30) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002129cd30,ffff80002e476618,ffff80002e476660) at sys_ioctl+0x4a2 syscall(ffff80002e4766e0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4766e0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26cbcc2eef0, count: -9 ddb{0}> show registers rdi 0xffff800022d6b000 rsi 0 rbp 0xffff80002e476150 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x501179aef451981c r11 0x5a0aacfa0d146881 r12 0xffff8000261c5f2c r13 0 r14 0xffff8000261c5e1a r15 0 rip 0xffffffff81b4bf7f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e4760f0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor.2) pid=465383 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff80002129ed30,0xffff80002129caa0 process=0xffff8000fffed0c0 user=0xffff80002e471000, vmspace=0xfffffd80673aeb88 estcpu=33, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5690 228421 54985 0 2 0 syz-executor.1 42499 276097 9371 0 2 0 syz-executor.0 42499 511023 9371 0 3 0x4000080 fsleep syz-executor.0 594 462722 78959 0 2 0 syz-executor.6 594 254291 78959 0 3 0x4000080 fsleep syz-executor.6 39751 386483 49131 0 2 0 syz-executor.7 82168 368112 19162 0 2 0 syz-executor.5 58298 445271 64214 0 2 0 syz-executor.4 49803 63566 61032 0 2 0 syz-executor.2 *49803 465383 61032 0 7 0x4000000 syz-executor.2 79811 280647 26926 0 2 0 syz-executor.3 79811 387280 26926 0 3 0x4000080 fsleep syz-executor.3 26926 189483 39809 0 3 0x82 nanoslp syz-executor.3 61032 306038 39809 0 2 0x482 syz-executor.2 9371 227884 39809 0 2 0x482 syz-executor.0 64214 217772 39809 0 2 0x2 syz-executor.4 54985 330065 39809 0 3 0x82 nanoslp syz-executor.1 19162 85150 39809 0 2 0x482 syz-executor.5 33363 37748 1 0 3 0x100083 ttyin getty 78959 4445 39809 0 2 0x482 syz-executor.6 49131 45733 39809 0 2 0x2 syz-executor.7 54382 455269 0 0 3 0x14280 nfsidl nfsio 69581 357807 0 0 3 0x14280 nfsidl nfsio 83691 479926 0 0 3 0x14280 nfsidl nfsio 94511 377316 0 0 3 0x14280 nfsidl nfsio 66317 268450 0 0 3 0x14280 nfsidl nfsio 6881 328367 0 0 3 0x14280 nfsidl nfsio 22342 9658 0 0 3 0x14280 nfsidl nfsio 58574 281131 0 0 3 0x14280 nfsidl nfsio 31671 50057 0 0 3 0x14280 nfsidl nfsio 76225 11587 0 0 3 0x14280 nfsidl nfsio 33917 324390 0 0 3 0x14280 nfsidl nfsio 12172 9562 0 0 3 0x14280 nfsidl nfsio 58753 518569 0 0 3 0x14280 nfsidl nfsio 6723 480063 0 0 3 0x14280 nfsidl nfsio 77417 60453 0 0 3 0x14280 nfsidl nfsio 20573 150662 0 0 3 0x14280 nfsidl nfsio 39649 264265 0 0 3 0x14280 nfsidl nfsio 57895 175372 0 0 3 0x14280 nfsidl nfsio 47256 83761 0 0 3 0x14280 nfsidl nfsio 58741 4425 0 0 3 0x14280 nfsidl nfsio 94947 449183 0 0 3 0x14200 bored sosplice 39809 170555 3850 0 3 0x82 thrsleep syz-fuzzer 39809 487486 3850 0 3 0x4000082 thrsleep syz-fuzzer 39809 209966 3850 0 3 0x4000082 thrsleep syz-fuzzer 39809 477196 3850 0 3 0x4000082 wait syz-fuzzer 39809 296683 3850 0 3 0x4000082 wait syz-fuzzer 39809 380957 3850 0 3 0x4000082 thrsleep syz-fuzzer 39809 165606 3850 0 3 0x4000082 wait syz-fuzzer 39809 11749 3850 0 3 0x4000082 thrsleep syz-fuzzer 39809 154860 3850 0 3 0x4000082 wait syz-fuzzer 39809 469487 3850 0 3 0x4000082 wait syz-fuzzer 39809 436065 3850 0 3 0x4000082 kqread syz-fuzzer 39809 434539 3850 0 3 0x4000082 wait syz-fuzzer 39809 111882 3850 0 3 0x4000082 thrsleep syz-fuzzer 39809 374458 3850 0 3 0x4000082 wait syz-fuzzer 39809 365355 3850 0 3 0x4000082 thrsleep syz-fuzzer 39809 239748 3850 0 3 0x4000082 wait syz-fuzzer 3850 228344 3667 0 3 0x10008a sigsusp ksh 3667 297027 18723 0 3 0x9a kqread sshd 18723 200897 1 0 3 0x88 kqread sshd 12253 209048 86933 74 3 0x1100092 bpf pflogd 86933 130424 1 0 3 0x80 netio pflogd 53987 20937 65663 73 3 0x1100090 kqread syslogd 65663 88002 1 0 3 0x100082 netio syslogd 83484 485926 1 0 3 0x100080 kqread resolvd 7516 198901 27013 77 3 0x100092 kqread dhcpleased 56740 130881 27013 77 3 0x100092 kqread dhcpleased 27013 262057 1 0 3 0x80 kqread dhcpleased 23340 370158 0 0 3 0x14200 bored smr 51094 436415 0 0 2 0x14200 zerothread 368 435852 0 0 3 0x14200 aiodoned aiodoned 17839 518915 0 0 3 0x14200 syncer update 15857 875 0 0 3 0x14200 cleaner cleaner 99744 109247 0 0 3 0x14200 reaper reaper 32848 275142 0 0 3 0x14200 pgdaemon pagedaemon 62122 133221 0 0 3 0x14200 bored viomb 12402 238062 0 0 3 0x40014200 acpi0 acpi0 51746 19698 0 0 7 0x40014200 idle1 6852 82605 0 0 3 0x14200 bored softnet 51386 23613 0 0 3 0x14200 bored softnet 20617 101848 0 0 3 0x14200 bored softnet 70997 305106 0 0 3 0x14200 bored softnet 98934 385540 0 0 3 0x14200 bored systqmp 60761 354643 0 0 3 0x14200 bored systq 25492 143955 0 0 2 0x40014200 softclock 4881 405189 0 0 3 0x40014200 idle0 1 449512 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49803 (syz-executor.2) thread 0xffff80002129cd30 (465383) 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 10243 6714K 7438K 78643K 38159 0 pcb 13 28K 30K 78643K 2142 0 rtable 275 25K 25K 78643K 4373 0 ifaddr 118 25K 25K 78643K 1417 0 sysctl 3 1K 1K 78643K 7 0 counters 62 36K 36K 78643K 670 0 ioctlops 1 1K 4K 78643K 4865 0 iov 0 0K 32K 78643K 1424 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1563 98K 98K 78643K 10377 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 13K 78643K 223 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1197 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 18 65K 85K 78643K 17848 0 sigio 0 0K 0K 78643K 535 0 proc 70 91K 128K 78643K 3363 0 subproc 104 6K 6K 78643K 1138 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1193 0 in_multi 86 5K 7K 78643K 1351 0 ether_multi 1 0K 0K 78643K 63 0 mrt 1 0K 0K 78643K 61 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 211 943K 943K 78643K 211 0 exec 0 0K 2K 78643K 5007 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 585 1235K 1236K 78643K 101043 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 759 0 NDP 18 0K 2K 78643K 438 0 temp 152 4727K 70263K 78643K 176555 0 kqueue 12 18K 26K 78643K 1396 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 1024 0 1021 12 11 1 3 0 8 0 rtentry 112 1373 0 1270 5 2 3 4 0 8 0 unpcb 144 29785 0 29769 151 149 2 8 0 8 1 syncache 296 74 0 74 19 19 0 1 0 8 0 tcpqe 32 268 0 268 11 11 0 1 0 8 0 tcpcb 768 23151 0 23146 533 532 1 32 0 8 0 arp 120 182 0 163 1 0 1 1 0 8 0 inpcb 368 32370 0 32362 329 327 2 22 0 8 1 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 316 0 291 1 0 1 1 0 8 0 pkpcb 40 166 0 165 18 17 1 1 0 8 0 kcovpl 48 86 0 78 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 168 0 166 19 18 1 1 0 8 0 pfstscr 40 11 0 11 2 2 0 1 0 8 0 pffrag 232 89 0 89 10 10 0 1 0 482 0 pffrnode 88 83 0 83 10 10 0 1 0 8 0 pffrent 40 270 0 270 12 12 0 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 pfrke_plain 168 3 0 3 1 1 0 1 0 8 0 pfrktable 1344 129 0 115 4 2 2 2 0 8 0 pfanchor 1280 78 0 72 4 2 2 2 0 8 0 pftag 88 9 0 5 1 0 1 1 0 8 0 pfqueue 264 7 0 7 2 2 0 1 0 8 0 pfstitem 24 175 0 173 1 0 1 1 0 8 0 pfstkey 120 189 0 187 2 1 1 2 0 8 0 pfstate 336 179 0 177 6 5 1 5 0 8 0 pfrule 1360 142 0 107 6 3 3 4 0 8 0 rttmr 136 13 0 13 5 5 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 6002 0 5596 68 42 26 32 0 8 0 art_table 32 6004 0 5597 5 1 4 5 0 8 0 art_node 16 1233 0 1143 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 5 1 0 1 1 0 8 0 semapl 112 1195 0 1185 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 23936 0 22440 94 0 94 94 0 8 0 ffsino 272 23936 0 22440 102 1 101 101 0 8 0 nchpl 144 46962 0 45317 63 0 63 63 0 8 0 rtmask 32 13 0 13 4 4 0 1 0 8 0 uvmvnodes 80 8268 0 0 169 0 169 169 0 8 0 vnodes 216 8268 0 0 460 0 460 460 0 8 0 namei 1024 166436 0 166436 8 7 1 2 0 8 1 percpumem 16 347 0 304 1 0 1 1 0 8 0 vcpupl 2048 115 0 0 15 0 15 15 0 8 0 vmpool 568 127 0 12 9 0 9 9 0 8 0 pfiaddrpl 120 42 0 20 3 2 1 1 0 8 0 kstatmem 264 478 0 442 3 0 3 3 0 8 0 scsiplug 72 31 0 31 7 7 0 1 0 8 0 scxspl 216 154209 0 154209 46 45 1 8 0 8 1 plimitpl 152 3174 0 3159 1 0 1 1 0 8 0 sigapl 424 18049 0 17980 11 3 8 8 0 8 0 futexpl 64 169353 0 169350 10 9 1 1 0 8 0 knotepl 120 1460 0 0 17 0 17 17 0 8 0 kqueuepl 216 3852 0 3844 61 60 1 5 0 8 0 pipepl 320 3417 0 3389 97 94 3 8 0 8 0 fdescpl 496 17988 0 17957 7 3 4 5 0 8 0 filepl 152 141696 0 141453 220 209 11 25 0 8 0 lockfpl 104 4721 0 4719 11 10 1 4 0 8 0 lockfspl 48 1504 0 1502 1 0 1 1 0 8 0 sessionpl 144 104 0 87 1 0 1 1 0 8 0 pgrppl 48 281 0 264 1 0 1 1 0 8 0 ucredpl 104 14992 0 14978 1 0 1 1 0 8 0 zombiepl 144 17980 0 17980 2 1 1 1 0 8 1 processpl 1064 18049 0 17980 5 0 5 5 0 8 0 procpl 672 46710 0 46622 25 16 9 10 0 8 0 srpgc 96 138 0 138 30 30 0 1 0 8 0 sosppl 168 178 0 178 29 29 0 1 0 8 0 sockpl 488 63432 0 63404 1281 1274 7 50 0 8 3 mcl64k 65536 24 0 0 3 1 2 3 0 8 0 mcl16k 16384 19 0 0 3 1 2 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 11 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 29 0 0 4 1 3 4 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 601 0 0 54 17 37 54 0 8 0 mtagpl 96 895 0 0 12 0 12 12 0 8 0 mbufpl 256 1377 0 0 43 0 43 43 0 8 0 bufpl 288 33854 0 25585 592 1 591 591 0 8 0 anonpl 24 3625654 0 3606827 442 313 129 195 0 186 0 amapchunkpl 152 333127 0 332301 435 399 36 346 0 158 0 amappl16 200 55775 0 55146 296 260 36 47 0 8 0 amappl15 192 3960 0 3953 1 0 1 1 0 8 0 amappl14 184 3122 0 3116 1 0 1 1 0 8 0 amappl13 176 1706 0 1704 1 0 1 1 0 8 0 amappl12 168 1812 0 1801 1 0 1 1 0 8 0 amappl11 160 2618 0 2596 2 0 2 2 0 8 0 amappl10 152 1395 0 1391 1 0 1 1 0 8 0 amappl9 144 2619 0 2614 1 0 1 1 0 8 0 amappl8 136 4554 0 4379 7 0 7 7 0 8 0 amappl7 128 2613 0 2590 1 0 1 1 0 8 0 amappl6 120 2841 0 2822 2 1 1 2 0 8 0 amappl5 112 15121 0 15104 1 0 1 1 0 8 0 amappl4 104 7386 0 7343 2 0 2 2 0 8 0 amappl3 96 53082 0 53025 2 0 2 2 0 8 0 amappl2 88 4010 0 3965 2 0 2 2 0 8 0 amappl1 80 440745 0 440090 23 7 16 20 0 8 0 amappl 88 98721 0 98447 10 3 7 7 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 18116 0 17970 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 18116 0 17970 1 0 1 1 0 8 0 vmmpekpl 168 126949 0 126856 5 0 5 5 0 8 0 vmmpepl 168 1768014 0 1764933 493 348 145 180 0 357 0 vmsppl 368 18115 0 17970 16 2 14 14 0 8 0 rwobjpl 56 431539 0 421282 179 32 147 149 0 8 0 pdppl 4096 36239 0 36055 1149 965 184 184 0 8 0 pvpl 32 7090904 0 7068538 770 558 212 321 0 265 7 pmappl 248 18115 0 17970 11 1 10 10 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2523 0 1394 33 0 33 33 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff8000261c5e1a,ffff8000261c5f2c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000261c5de0,3409,b81,ffff800000d24e6c,3409) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e4762c8,ffff800000d24c00) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e4762c8,ffff800000d24c00) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086334,82907003,ffff800000d24c00,1,ffff80002129cd30) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086334,82907003,ffff800000d24c00,1,ffff80002129cd30) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8066f44a38,82907003,ffff800000d24c00,1,fffffd807f7d7068,ffff80002129cd30) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8071263270,82907003,ffff800000d24c00,ffff80002129cd30) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002129cd30,ffff80002e476618,ffff80002e476660) at sys_ioctl+0x4a2 syscall(ffff80002e4766e0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4766e0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x26cbcc2eef0, 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