kernel: integer divide fault trap, code=0 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace rc4_keysetup(ffff80002a2ab94a,ffff80002a2aba5c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002a2ab930,ffffccb4,1303,ffff800000687e80,0) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002665d158,ffff800000687c00) at pipex_init_session+0x62c pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002665d158,ffff800000687c00) at pipex_init_session+0x62c sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000687c00,1,ffff8000217c5268) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000687c00,1,ffff8000217c5268) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806972d528,82907003,ffff800000687c00,1,fffffd807f7d75b0,ffff8000217c5268) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806812cb58,82907003,ffff800000687c00,ffff8000217c5268) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000217c5268,ffff80002665d4a8,ffff80002665d500) at sys_ioctl+0x49e syscall(ffff80002665d570) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7593ddc2940, count: -9 ddb> show registers rdi 0xffff800029a84000 rsi 0 rbp 0xffff80002665cfe0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x4682f5ae540e8ae0 r11 0xa70b32af1148fb30 r12 0xffff80002a2aba5c r13 0 r14 0xffff80002a2ab94a r15 0 rip 0xffffffff81e480ff rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002665cf80 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb> show proc PROC (syz-executor.7) pid=33036 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=71, nice=20 forw=0xffffffffffffffff, list=0xffff800024bdcfd0,0xffff800021704560 process=0xffff800021711b80 user=0xffff800026658000, vmspace=0xfffffd806d12b670 estcpu=21, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 62361 463973 28355 0 2 0 syz-executor.5 62361 15278 28355 0 3 0x4000080 ttyout syz-executor.5 62361 240479 28355 0 3 0x4000080 fsleep syz-executor.5 39022 92937 57991 0 2 0 syz-executor.7 *39022 33036 57991 0 7 0x4000000 syz-executor.7 39022 464191 57991 0 3 0x4000080 fsleep syz-executor.7 82006 283788 86476 0 2 0x2 syz-executor.1 74785 300713 86476 0 3 0x82 nanoslp syz-executor.4 71887 97939 86476 0 3 0x82 nanoslp syz-executor.3 20088 198642 0 0 3 0x14200 bored sosplice 28355 8122 86476 0 3 0x82 nanoslp syz-executor.5 69497 426004 86476 0 3 0x82 nanoslp syz-executor.6 57991 40976 86476 0 3 0x82 nanoslp syz-executor.7 67910 20014 86476 0 2 0x2 syz-executor.0 26986 481977 86476 0 3 0x82 nanoslp syz-executor.2 86476 384644 67854 0 3 0x82 thrsleep syz-fuzzer 86476 357729 67854 0 3 0x4000082 nanoslp syz-fuzzer 86476 312787 67854 0 3 0x4000082 wait syz-fuzzer 86476 490773 67854 0 3 0x4000082 thrsleep syz-fuzzer 86476 42473 67854 0 3 0x4000082 wait syz-fuzzer 86476 173881 67854 0 3 0x4000082 thrsleep syz-fuzzer 86476 79989 67854 0 3 0x4000082 wait syz-fuzzer 86476 397844 67854 0 3 0x4000082 thrsleep syz-fuzzer 86476 166789 67854 0 3 0x4000082 kqread syz-fuzzer 86476 512710 67854 0 3 0x4000082 wait syz-fuzzer 86476 155034 67854 0 3 0x4000082 wait syz-fuzzer 86476 244870 67854 0 3 0x4000082 wait syz-fuzzer 86476 155603 67854 0 3 0x4000082 thrsleep syz-fuzzer 86476 343801 67854 0 3 0x4000082 wait syz-fuzzer 86476 190408 67854 0 3 0x4000082 wait syz-fuzzer 67854 476471 74281 0 3 0x10008a sigsusp ksh 74281 41570 78564 0 3 0x9a kqread sshd 3433 343451 1 0 3 0x100083 ttyin getty 78564 385940 1 0 3 0x88 kqread sshd 57714 494696 14848 73 3 0x1100090 kqread syslogd 14848 276822 1 0 3 0x100082 netio syslogd 71925 147987 1 0 3 0x100080 kqread resolvd 5661 157918 43490 77 3 0x100092 kqread dhcpleased 73881 142326 43490 77 3 0x100092 kqread dhcpleased 43490 107574 1 0 3 0x80 kqread dhcpleased 73526 183477 0 0 3 0x14200 bored smr 69870 240874 0 0 2 0x14200 zerothread 28400 126176 0 0 3 0x14200 aiodoned aiodoned 877 136489 0 0 3 0x14200 syncer update 57770 431967 0 0 3 0x14200 cleaner cleaner 23672 306425 0 0 3 0x14200 reaper reaper 5944 237 0 0 3 0x14200 pgdaemon pagedaemon 67951 521448 0 0 3 0x14200 bored viomb 1662 376004 0 0 3 0x40014200 acpi0 acpi0 17152 207769 0 0 3 0x14200 bored softnet 72175 210800 0 0 3 0x14200 bored softnet 51416 230504 0 0 3 0x14200 bored softnet 77210 252771 0 0 3 0x14200 bored softnet 45968 368202 0 0 3 0x14200 bored systqmp 46920 26858 0 0 3 0x14200 bored systq 81936 493341 0 0 3 0x40014200 bored softclock 38583 454296 0 0 3 0x40014200 idle0 1 432477 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10190 6598K 7699K 78643K 20944 0 pcb 13 15K 17K 78643K 497 0 rtable 222 9K 10K 78643K 675 0 ifaddr 101 20K 20K 78643K 308 0 sysctl 2 0K 0K 78643K 2 0 counters 30 17K 17K 78643K 57 0 ioctlops 1 1K 4K 78643K 375 0 iov 0 0K 16K 78643K 247 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1365 85K 86K 78643K 2778 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 96 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 77K 78643K 2615 0 sigio 0 0K 0K 78643K 125 0 proc 59 59K 75K 78643K 633 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 6 0K 0K 78643K 1545 0 in_multi 85 5K 6K 78643K 206 0 ether_multi 1 0K 0K 78643K 16 0 mrt 1 0K 0K 78643K 4 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 971 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 253 180K 181K 78643K 15292 0 UVM aobj 21 2K 2K 78643K 24 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 55 0 NDP 14 0K 1K 78643K 66 0 temp 138 4718K 5302K 78643K 43625 0 kqueue 12 18K 26K 78643K 193 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 246 0 243 4 3 1 3 0 8 0 rtentry 112 184 0 88 4 0 4 4 0 8 0 unpcb 144 1562 0 1549 23 22 1 6 0 8 0 syncache 296 18 0 18 5 5 0 1 0 8 0 tcpcb 768 708 0 704 33 32 1 20 0 8 0 arp 88 26 0 9 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 320 3665 0 3654 42 40 2 13 0 8 1 nd6 48 42 0 21 1 0 1 1 0 8 0 pkpcb 40 18 0 18 1 1 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1160 16 0 14 6 5 1 1 0 8 0 pfstscr 40 15 0 11 1 0 1 1 0 8 0 pfosfp 40 5 0 4 1 0 1 1 0 8 0 pfosfpen 112 5 0 4 1 0 1 1 0 8 0 pfrktable 1344 58 0 52 2 1 1 1 0 8 0 pfanchor 1280 8 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfqueue 264 68 0 68 1 1 0 1 0 8 0 pfstitem 24 5 0 0 1 0 1 1 0 8 0 pfstkey 120 25 0 20 1 0 1 1 0 8 0 pfstate 336 14 0 11 1 0 1 1 0 8 0 pfrule 1360 53 0 44 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 844 0 421 32 5 27 29 0 8 0 art_table 32 846 0 421 4 0 4 4 0 8 0 art_node 16 183 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 94 0 84 1 0 1 1 0 8 0 shmpl 112 21 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4515 0 3078 91 0 91 91 0 8 0 ffsino 240 4515 0 3078 85 0 85 85 0 8 0 nchpl 144 7945 0 6309 63 0 63 63 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 26517 0 26516 3 2 1 2 0 8 0 vcpupl 2048 7 0 0 1 0 1 1 0 8 0 vmpool 536 10 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 20 0 14 1 0 1 1 0 8 0 kstatmem 264 82 0 54 3 1 2 3 0 8 0 scxspl 216 22771 0 22771 9 8 1 8 0 8 1 plimitpl 152 186 0 172 1 0 1 1 0 8 0 sigapl 424 2897 0 2853 6 0 6 6 0 8 0 futexpl 64 25114 0 25112 1 0 1 1 0 8 0 knotepl 120 40784 0 40704 32 29 3 17 0 8 0 kqueuepl 184 500 0 492 10 9 1 4 0 8 0 pipepl 288 616 0 588 14 11 3 7 0 8 0 fdescpl 432 2880 0 2857 4 0 4 4 0 8 0 filepl 120 18107 0 17866 28 19 9 15 0 8 1 lockfpl 104 486 0 484 3 2 1 2 0 8 0 lockfspl 48 100 0 98 1 0 1 1 0 8 0 sessionpl 144 26 0 10 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 104 1315 0 1304 1 0 1 1 0 8 0 zombiepl 144 2857 0 2853 1 0 1 1 0 8 0 processpl 1000 2897 0 2853 8 2 6 7 0 8 0 procpl 672 6591 0 6529 13 7 6 8 0 8 0 sosppl 168 23 0 23 6 6 0 1 0 8 0 sockpl 456 5526 0 5499 109 103 6 21 0 8 2 mcl64k 65536 98 0 98 4 3 1 1 0 8 1 mcl16k 16384 30 0 30 8 8 0 1 0 8 0 mcl12k 12288 150 0 150 3 3 0 1 0 8 0 mcl9k 9216 22 0 22 5 5 0 1 0 8 0 mcl8k 8192 93 0 93 5 4 1 1 0 8 1 mcl4k 4096 227 0 227 2 1 1 1 0 8 1 mcl2k2 2112 12 0 12 5 5 0 1 0 8 0 mcl2k 2048 76453 0 76395 16 7 9 14 0 8 0 mtagpl 96 378 0 200 7 1 6 6 0 8 0 mbufpl 256 141363 0 140928 39 7 32 35 0 8 0 bufpl 288 6938 0 531 458 0 458 458 0 8 0 anonpl 24 518435 0 502843 139 34 105 126 0 188 0 amapchunkpl 152 43128 0 42523 31 3 28 29 0 158 0 amappl16 200 7654 0 7074 61 29 32 43 0 8 0 amappl15 192 408 0 400 1 0 1 1 0 8 0 amappl14 184 252 0 250 1 0 1 1 0 8 0 amappl13 176 765 0 761 1 0 1 1 0 8 0 amappl12 168 14 0 8 1 0 1 1 0 8 0 amappl11 160 327 0 311 1 0 1 1 0 8 0 amappl10 152 83 0 79 1 0 1 1 0 8 0 amappl9 144 816 0 812 1 0 1 1 0 8 0 amappl8 136 1303 0 1230 3 0 3 3 0 8 0 amappl7 128 778 0 757 1 0 1 1 0 8 0 amappl6 120 555 0 541 2 1 1 2 0 8 0 amappl5 112 1873 0 1861 1 0 1 1 0 8 0 amappl4 104 1407 0 1379 2 1 1 2 0 8 0 amappl3 96 8384 0 8342 2 0 2 2 0 8 0 amappl2 88 1158 0 1121 2 1 1 2 0 8 0 amappl1 80 71241 0 70674 19 4 15 19 0 8 0 amappl 88 14713 0 14565 6 1 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 23 0 3 1 0 1 1 0 8 0 uaddrrnd 24 2890 0 2860 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2890 0 2860 1 0 1 1 0 8 0 vmmpekpl 168 23049 0 23002 3 0 3 3 0 8 0 vmmpepl 168 277457 0 275228 167 47 120 141 0 357 0 vmsppl 272 2889 0 2860 5 2 3 3 0 8 0 rwobjpl 24 72600 0 65137 46 0 46 46 0 8 0 pdppl 4096 5786 0 5727 199 128 71 71 0 8 12 pvpl 32 1061518 0 1042111 250 77 173 239 0 265 0 pmappl 216 2889 0 2860 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 972 0 180 23 0 23 23 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace rc4_keysetup(ffff80002a2ab94a,ffff80002a2aba5c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002a2ab930,ffffccb4,1303,ffff800000687e80,0) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002665d158,ffff800000687c00) at pipex_init_session+0x62c pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002665d158,ffff800000687c00) at pipex_init_session+0x62c sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000687c00,1,ffff8000217c5268) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000687c00,1,ffff8000217c5268) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806972d528,82907003,ffff800000687c00,1,fffffd807f7d75b0,ffff8000217c5268) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806812cb58,82907003,ffff800000687c00,ffff8000217c5268) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000217c5268,ffff80002665d4a8,ffff80002665d500) at sys_ioctl+0x49e syscall(ffff80002665d570) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7593ddc2940, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace rc4_keysetup(ffff80002a2ab94a,ffff80002a2aba5c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002a2ab930,ffffccb4,1303,ffff800000687e80,0) at pipex_mppe_init+0x207 sys/net/pipex.c:2319 pipex_init_session(ffff80002665d158,ffff800000687c00) at pipex_init_session+0x62c pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff80002665d158,ffff800000687c00) at pipex_init_session+0x62c sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000687c00,1,ffff8000217c5268) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000687c00,1,ffff8000217c5268) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd806972d528,82907003,ffff800000687c00,1,fffffd807f7d75b0,ffff8000217c5268) at VOP_IOCTL+0x8d sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806812cb58,82907003,ffff800000687c00,ffff8000217c5268) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000217c5268,ffff80002665d4a8,ffff80002665d500) at sys_ioctl+0x49e syscall(ffff80002665d570) at syscall+0x447 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7593ddc2940, count: -9