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(ffff80002126e7da,ffff80002126e8ec,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002126e7a0,2df7,340,ffff800000ba2a6c,2df7) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff8000212d62c8,ffff800000ba2800) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff8000212d62c8,ffff800000ba2800) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000ba2800,1,ffff800021233ce8) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000ba2800,1,ffff800021233ce8) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8079578950,82907003,ffff800000ba2800,1,fffffd807f7d7888,ffff800021233ce8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e5c97c8,82907003,ffff800000ba2800,ffff800021233ce8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021233ce8,ffff8000212d6618,ffff8000212d6660) at sys_ioctl+0x4a2 syscall(ffff8000212d66e0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000212d66e0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2dc0, count: -9 ddb{0}> show registers rdi 0xffff80002126e7da rsi 0 rbp 0xffff8000212d6150 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0xdc6e5d4fb957d3bb r11 0xcb8521b052bc4d50 r12 0xffff80002126e8ec r13 0 r14 0xffff80002126e7da r15 0 rip 0xffffffff8187a46f rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000212d60f0 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{0}> show proc PROC (syz-executor1805900762) pid=169268 stat=onproc flags process=2 proc=0 pri=17, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021233a48,0xffffffff82a6df58 process=0xffff80002129a150 user=0xffff8000212d1000, vmspace=0xfffffd806ef6ca18 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *11242 169268 614 0 7 0x2 syz-executor1805900762 614 345349 36146 0 3 0x10008a sigsusp ksh 36146 352457 19406 0 3 0x9a kqread sshd 4793 155002 1 0 3 0x100083 ttyin getty 19406 442985 1 0 3 0x88 kqread sshd 63747 89465 27263 74 3 0x1100092 bpf pflogd 27263 13570 1 0 3 0x80 netio pflogd 97369 390801 28592 73 3 0x1100090 kqread syslogd 28592 184835 1 0 3 0x100082 netio syslogd 59587 374118 1 0 3 0x100080 kqread resolvd 41766 127812 12610 77 7 0x100012 dhcpleased 78214 162485 12610 77 3 0x100092 kqread dhcpleased 12610 338156 1 0 3 0x80 kqread dhcpleased 93852 11570 0 0 3 0x14200 bored smr 19171 327331 0 0 3 0x14200 pgzero zerothread 51304 477800 0 0 3 0x14200 aiodoned aiodoned 49913 238243 0 0 3 0x14200 syncer update 96114 229415 0 0 3 0x14200 cleaner cleaner 58075 277910 0 0 3 0x14200 reaper reaper 5983 380036 0 0 3 0x14200 pgdaemon pagedaemon 14152 298423 0 0 3 0x14200 bored viomb 1490 307109 0 0 3 0x40014200 acpi0 acpi0 11503 375993 0 0 3 0x40014200 idle1 20875 117701 0 0 3 0x14200 bored softnet 12068 37700 0 0 3 0x14200 bored softnet 15351 174505 0 0 3 0x14200 bored softnet 12854 465333 0 0 3 0x14200 bored softnet 30903 386848 0 0 3 0x14200 bored systqmp 64084 446012 0 0 3 0x14200 bored systq 79064 90376 0 0 3 0x40014200 bored softclock 9097 494636 0 0 3 0x40014200 idle0 1 336505 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 11242 (syz-executor1805900762) thread 0xffff800021233ce8 (169268) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82ad7058) #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 57 3K 5K 78643K 1607 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 2593 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 35 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 mppekey 1024 1 0 0 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 8 0 0 1 0 1 1 0 8 0 pfstkey 120 8 0 0 1 0 1 1 0 8 0 pfstate 336 8 0 0 1 0 1 1 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 95 0 0 6 0 6 6 0 8 0 art_table 32 96 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 3793 0 3793 2 1 1 2 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 334 0 302 5 1 4 5 0 8 0 knotepl 120 47 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 496 317 0 302 3 0 3 3 0 8 0 filepl 152 1207 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 334 0 302 3 0 3 3 0 8 0 procpl 672 334 0 302 4 1 3 4 0 8 0 sockpl 488 88 0 64 5 1 4 4 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 73 0 0 10 0 10 10 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 124 0 0 8 0 8 8 0 8 0 bufpl 288 1989 0 85 136 0 136 136 0 8 0 anonpl 24 39247 0 37253 17 3 14 15 0 186 1 amapchunkpl 152 2917 0 2819 7 2 5 6 0 158 1 amappl16 200 30 0 29 2 1 1 1 0 8 0 amappl15 192 71 0 67 1 0 1 1 0 8 0 amappl14 184 1 0 1 1 1 0 1 0 8 0 amappl13 176 34 0 33 2 1 1 1 0 8 0 amappl12 168 3 0 3 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 144 473 0 471 1 0 1 1 0 8 0 amappl8 136 382 0 381 2 1 1 1 0 8 0 amappl7 128 68 0 61 1 0 1 1 0 8 0 amappl6 120 93 0 87 1 0 1 1 0 8 0 amappl5 112 94 0 81 1 0 1 1 0 8 0 amappl4 104 655 0 632 1 0 1 1 0 8 0 amappl3 96 468 0 443 1 0 1 1 0 8 0 amappl2 88 328 0 299 1 0 1 1 0 8 0 amappl1 80 9837 0 9420 10 0 10 10 0 8 0 amappl 88 1314 0 1274 2 0 2 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 0 303 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 318 0 303 1 0 1 1 0 8 0 vmmpekpl 168 6288 0 6267 2 0 2 2 0 8 0 vmmpepl 168 27854 0 26992 45 3 42 42 0 357 0 vmsppl 368 317 0 303 2 0 2 2 0 8 0 rwobjpl 56 9945 0 7935 31 1 30 30 0 8 1 pdppl 4096 643 0 606 59 22 37 45 0 8 0 pvpl 32 130812 0 126849 37 2 35 35 0 265 0 pmappl 248 317 0 303 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 418 0 25 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace rc4_keysetup(ffff80002126e7da,ffff80002126e8ec,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff80002126e7a0,2df7,340,ffff800000ba2a6c,2df7) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff8000212d62c8,ffff800000ba2800) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff8000212d62c8,ffff800000ba2800) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000ba2800,1,ffff800021233ce8) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000ba2800,1,ffff800021233ce8) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8079578950,82907003,ffff800000ba2800,1,fffffd807f7d7888,ffff800021233ce8) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e5c97c8,82907003,ffff800000ba2800,ffff800021233ce8) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff800021233ce8,ffff8000212d6618,ffff8000212d6660) at sys_ioctl+0x4a2 syscall(ffff8000212d66e0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000212d66e0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd2dc0, 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 __mp_lock(ffffffff82ad6e50) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82ad6e50) at __mp_lock+0x129 sys/kern/kern_lock.c:147 kqueue_scan(ffff8000212961e0,8,ffff8000212962e0,0,ffff8000ffff6a90,ffff80002129643c) at kqueue_scan+0xf7 sys/kern/kern_event.c:1293 sys_kevent(ffff8000ffff6a90,ffff8000212964a0,ffff8000212964f0) at sys_kevent+0x4a4 sys/kern/kern_event.c:978 syscall(ffff800021296570) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800021296570) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffeeb80, count: -8 ddb{1}>