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(ffff8000212de45a,ffff8000212de56c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000212de420,ffff9e5f,f2,ffff800000ba2280,0) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff8000212da7c8,ffff800000ba2000) at pipex_init_session+0x637 pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff8000212da7c8,ffff800000ba2000) at pipex_init_session+0x637 sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000ba2000,1,ffff800021232fc8) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000ba2000,1,ffff800021232fc8) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807ea60950,82907003,ffff800000ba2000,1,fffffd807f7d7750,ffff800021232fc8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e5df860,82907003,ffff800000ba2000,ffff800021232fc8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021232fc8,ffff8000212dab18,ffff8000212dab60) at sys_ioctl+0x4a2 syscall(ffff8000212dabe0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000212dabe0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8e5fc99dc70, count: -9 ddb{0}> show registers rdi 0xffff8000212de45a rsi 0 rbp 0xffff8000212da650 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0xc1b9720fb863b10f r11 0x4aec7913fc530af8 r12 0xffff8000212de56c r13 0 r14 0xffff8000212de45a r15 0 rip 0xffffffff823d811f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000212da5f0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor2054414396) pid=373511 stat=onproc flags process=0 proc=4000000 pri=52, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff800021233508,0xffffffff82ba7f40 process=0xffff80002129adc8 user=0xffff8000212d5000, vmspace=0xfffffd8072d6d738 estcpu=2, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17955 376531 65216 0 7 0 syz-executor2054414396 *17955 373511 65216 0 7 0x4000000 syz-executor2054414396 65216 306216 61028 0 3 0x82 nanoslp syz-executor2054414396 61028 145510 7011 0 3 0x10008a sigsusp ksh 7011 445906 8428 0 3 0x9a kqread sshd 85914 105848 1 0 3 0x100083 ttyin getty 8428 292383 1 0 3 0x88 kqread sshd 88574 27264 12650 74 3 0x1100092 bpf pflogd 12650 257928 1 0 3 0x80 netio pflogd 50634 8392 70378 73 3 0x1100090 kqread syslogd 70378 261922 1 0 3 0x100082 netio syslogd 77050 436583 1 0 3 0x100080 kqread resolvd 65718 438219 73333 77 3 0x100092 kqread dhcpleased 34876 190107 73333 77 3 0x100092 kqread dhcpleased 73333 202438 1 0 3 0x80 kqread dhcpleased 56516 494740 0 0 3 0x14200 bored smr 41713 194789 0 0 3 0x14200 pgzero zerothread 89204 371839 0 0 3 0x14200 aiodoned aiodoned 71763 499403 0 0 3 0x14200 syncer update 13431 189635 0 0 3 0x14200 cleaner cleaner 73210 18999 0 0 3 0x14200 reaper reaper 17773 141439 0 0 3 0x14200 pgdaemon pagedaemon 92623 497339 0 0 3 0x14200 bored viomb 67782 165095 0 0 3 0x40014200 acpi0 acpi0 8379 255443 0 0 3 0x40014200 idle1 70303 423777 0 0 3 0x14200 bored softnet 72480 169388 0 0 3 0x14200 bored softnet 71550 514642 0 0 3 0x14200 bored softnet 39636 208515 0 0 3 0x14200 bored softnet 8458 72948 0 0 3 0x14200 bored systqmp 77311 96316 0 0 3 0x14200 bored systq 40777 383209 0 0 3 0x40014200 bored softclock 52137 190345 0 0 3 0x40014200 idle0 1 448628 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 17955 (syz-executor2054414396) thread 0xffff800021232fc8 (373511) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b5a398) #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 10158 6457K 6457K 78643K 11248 0 pcb 13 8K 8K 78643K 13 0 rtable 58 1K 2K 78643K 115 0 ifaddr 34 8K 8K 78643K 37 0 counters 44 34K 34K 78643K 44 0 ioctlops 1 1K 4K 78643K 1480 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1168 73K 73K 78643K 1181 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 67 91K 91K 78643K 282 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 2K 78643K 451 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 60 3K 5K 78643K 1611 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 5 0K 0K 78643K 5 0 temp 25 4709K 4773K 78643K 2601 0 kqueue 11 16K 18K 78643K 24 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 21 0 18 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 37 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 768 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 368 32 0 26 1 0 1 1 0 8 0 ppxss 1256 2 0 0 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 pfstitem 24 9 0 2 1 0 1 1 0 8 0 pfstkey 120 9 0 2 1 0 1 1 0 8 0 pfstate 336 9 0 2 1 0 1 1 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1426 0 40 87 0 87 87 0 8 0 ffsino 272 1426 0 40 93 0 93 93 0 8 0 nchpl 144 1612 0 48 58 0 58 58 0 8 0 uvmvnodes 80 1436 0 0 30 0 30 30 0 8 0 vnodes 216 1436 0 0 80 0 80 80 0 8 0 namei 1024 4447 0 4447 2 1 1 1 0 8 1 percpumem 16 34 0 0 1 0 1 1 0 8 0 kstatmem 264 10 0 0 1 0 1 1 0 8 0 scxspl 216 4066 0 4066 10 9 1 8 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 335 0 302 5 1 4 5 0 8 0 knotepl 120 49 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 320 90 0 87 2 1 1 1 0 8 0 fdescpl 496 318 0 302 3 0 3 3 0 8 0 filepl 152 1209 0 1148 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 104 69 0 57 1 0 1 1 0 8 0 zombiepl 144 302 0 302 2 1 1 1 0 8 1 processpl 1064 335 0 302 3 0 3 3 0 8 0 procpl 672 336 0 302 4 1 3 4 0 8 0 sockpl 488 90 0 64 5 1 4 4 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 89 0 0 11 0 11 11 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 148 0 0 9 0 9 9 0 8 0 bufpl 288 1999 0 85 137 0 137 137 0 8 0 anonpl 24 39795 0 37654 17 4 13 15 0 186 0 amapchunkpl 152 2921 0 2814 7 2 5 6 0 158 0 amappl16 200 31 0 30 2 1 1 1 0 8 0 amappl15 192 71 0 67 1 0 1 1 0 8 0 amappl13 176 36 0 34 1 0 1 1 0 8 0 amappl12 168 4 0 4 2 1 1 1 0 8 1 amappl11 160 66 0 49 1 0 1 1 0 8 0 amappl10 152 2 0 1 1 0 1 1 0 8 0 amappl9 144 483 0 481 1 0 1 1 0 8 0 amappl8 136 383 0 380 2 1 1 1 0 8 0 amappl7 128 66 0 59 1 0 1 1 0 8 0 amappl6 120 95 0 88 1 0 1 1 0 8 0 amappl5 112 94 0 82 1 0 1 1 0 8 0 amappl4 104 654 0 635 1 0 1 1 0 8 0 amappl3 96 464 0 437 1 0 1 1 0 8 0 amappl2 88 328 0 299 1 0 1 1 0 8 0 amappl1 80 9977 0 9545 12 2 10 10 0 8 0 amappl 88 1319 0 1276 2 1 1 2 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 318 0 302 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 318 0 302 1 0 1 1 0 8 0 vmmpekpl 168 6300 0 6282 1 0 1 1 0 8 0 vmmpepl 168 28086 0 27168 47 6 41 42 0 357 1 vmsppl 368 317 0 302 2 0 2 2 0 8 0 rwobjpl 56 10106 0 8083 29 0 29 29 0 8 0 pdppl 4096 643 0 604 67 28 39 45 0 8 0 pvpl 32 131619 0 127454 42 7 35 35 0 265 0 pmappl 248 317 0 302 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 428 0 32 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff8000212de45a,ffff8000212de56c,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff8000212de420,ffff9e5f,f2,ffff800000ba2280,0) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff8000212da7c8,ffff800000ba2000) at pipex_init_session+0x637 pipex_session_init_mppe_send sys/net/pipex.c:2336 [inline] pipex_init_session(ffff8000212da7c8,ffff800000ba2000) at pipex_init_session+0x637 sys/net/pipex.c:390 pppacioctl(4086337,82907003,ffff800000ba2000,1,ffff800021232fc8) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000ba2000,1,ffff800021232fc8) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd807ea60950,82907003,ffff800000ba2000,1,fffffd807f7d7750,ffff800021232fc8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e5df860,82907003,ffff800000ba2000,ffff800021232fc8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021232fc8,ffff8000212dab18,ffff8000212dab60) at sys_ioctl+0x4a2 syscall(ffff8000212dabe0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000212dabe0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8e5fc99dc70, 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 end of kernel end trace frame: 0x7f7ffffd05a0, count: -3 ddb{1}>