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(ffff800027be3312,ffff800027be3424,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800027be32d8,1803,682e,ffff800000dbb26c,1803) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e57be48,ffff800000dbb000) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e57be48,ffff800000dbb000) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000dbb000,1,ffff8000212597b0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000dbb000,1,ffff8000212597b0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8074017a80,82907003,ffff800000dbb000,1,fffffd807f7d7820,ffff8000212597b0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069757be8,82907003,ffff800000dbb000,ffff8000212597b0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000212597b0,ffff80002e57c198,ffff80002e57c1e0) at sys_ioctl+0x4a2 syscall(ffff80002e57c260) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e57c260) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x775c5d0ac30, count: -9 ddb{1}> show registers rdi 0xffff800022d7b000 rsi 0 rbp 0xffff80002e57bcd0 rbx 0 rdx 0 rcx 0 rax 0x1 r8 0x60 r9 0x2f2d33bf r10 0x2b9d8fa46b765f95 r11 0xeb68a958846c6f19 r12 0xffff800027be3424 r13 0 r14 0xffff800027be3312 r15 0 rip 0xffffffff8222daff rc4_keysetup+0xaf cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002e57bc70 ss 0x10 rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> show proc PROC (syz-executor.0) pid=280169 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=65, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5508,0xffffffff829f51c0 process=0xffff8000fffeba50 user=0xffff80002e577000, vmspace=0xfffffd8066057a30 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77787 315989 40277 0 7 0 syz-executor.0 *77787 280169 40277 0 7 0x4000000 syz-executor.0 1948 224782 65478 0 2 0 syz-executor.1 1948 365045 65478 0 3 0x4000080 fsleep syz-executor.1 1114 160933 19152 0 2 0 syz-executor.7 1114 129116 19152 0 3 0x4000080 fsleep syz-executor.7 86003 497660 70574 0 2 0 syz-executor.6 86003 522229 70574 0 3 0x4000080 fsleep syz-executor.6 21757 492390 13584 0 2 0 syz-executor.4 21757 459116 13584 0 3 0x4000080 ttyin syz-executor.4 66743 384626 16281 0 2 0 syz-executor.3 66743 133674 16281 0 3 0x4000080 fsleep syz-executor.3 13584 450703 53890 0 3 0x82 nanoslp syz-executor.4 65478 175178 53890 0 3 0x82 nanoslp syz-executor.1 70574 440505 53890 0 3 0x82 nanoslp syz-executor.6 75142 286224 53890 0 3 0x82 nanoslp syz-executor.2 16281 391968 53890 0 3 0x82 nanoslp syz-executor.3 40277 10410 53890 0 3 0x82 nanoslp syz-executor.0 40938 206192 0 0 3 0x14200 acct acct 19152 21345 53890 0 3 0x82 nanoslp syz-executor.7 18526 426558 0 0 3 0x14200 bored sosplice 53890 419748 25210 0 3 0x82 wait syz-fuzzer 53890 474523 25210 0 2 0x4000002 syz-fuzzer 53890 399966 25210 0 3 0x4000082 wait syz-fuzzer 53890 457854 25210 0 3 0x4000082 thrsleep syz-fuzzer 53890 372723 25210 0 3 0x4000082 thrsleep syz-fuzzer 53890 519748 25210 0 3 0x4000082 wait syz-fuzzer 53890 244322 25210 0 3 0x4000082 thrsleep syz-fuzzer 53890 407095 25210 0 3 0x4000082 wait syz-fuzzer 53890 288577 25210 0 3 0x4000082 thrsleep syz-fuzzer 53890 5675 25210 0 3 0x4000082 wait syz-fuzzer 53890 363722 25210 0 3 0x4000082 kqread syz-fuzzer 53890 400388 25210 0 3 0x4000082 thrsleep syz-fuzzer 53890 142230 25210 0 3 0x4000082 wait syz-fuzzer 53890 286765 25210 0 3 0x4000082 wait syz-fuzzer 53890 499395 25210 0 3 0x4000082 thrsleep syz-fuzzer 53890 56954 25210 0 3 0x4000082 wait syz-fuzzer 25210 390529 78359 0 3 0x10008a sigsusp ksh 78359 244251 30902 0 3 0x9a kqread sshd 20959 453975 1 0 3 0x100083 ttyin getty 30902 407809 1 0 3 0x88 kqread sshd 39709 361914 54860 74 3 0x1100092 bpf pflogd 54860 369138 1 0 3 0x80 netio pflogd 51354 217827 64041 73 3 0x1100090 kqread syslogd 64041 172772 1 0 3 0x100082 netio syslogd 46948 419934 1 0 3 0x100080 kqread resolvd 98621 139756 44773 77 3 0x100092 kqread dhcpleased 46523 339554 44773 77 3 0x100092 kqread dhcpleased 44773 299860 1 0 3 0x80 kqread dhcpleased 40391 420726 0 0 3 0x14200 bored smr 29622 379753 0 0 2 0x14200 zerothread 40373 175213 0 0 3 0x14200 aiodoned aiodoned 29681 333151 0 0 3 0x14200 syncer update 66413 425281 0 0 3 0x14200 cleaner cleaner 18911 415302 0 0 3 0x14200 reaper reaper 70242 8623 0 0 3 0x14200 pgdaemon pagedaemon 42981 481475 0 0 3 0x14200 bored viomb 72799 277549 0 0 3 0x40014200 acpi0 acpi0 88155 355144 0 0 3 0x40014200 idle1 51612 422714 0 0 3 0x14200 bored softnet 2447 194092 0 0 3 0x14200 bored softnet 83933 258899 0 0 3 0x14200 bored softnet 12221 186088 0 0 3 0x14200 bored softnet 52521 400376 0 0 3 0x14200 bored systqmp 74420 47666 0 0 3 0x14200 bored systq 90667 149150 0 0 3 0x40014200 bored softclock 47013 344439 0 0 3 0x40014200 idle0 1 419768 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 77787 (syz-executor.0) thread 0xffff8000212597b0 (280169) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82a42348) #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 10244 6527K 6941K 78643K 22746 0 pcb 13 18K 23K 78643K 1428 0 rtable 221 18K 22K 78643K 2766 0 ifaddr 119 24K 25K 78643K 1530 0 sysctl 3 1K 1K 78643K 3 0 counters 60 36K 36K 78643K 334 0 ioctlops 1 1K 4K 78643K 3478 0 iov 0 0K 24K 78643K 805 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1380 86K 86K 78643K 6389 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 65 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 816 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 89K 78643K 9048 0 sigio 0 0K 0K 78643K 66 0 proc 71 91K 116K 78643K 1881 0 subproc 104 6K 6K 78643K 552 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 350 0 in_multi 80 5K 6K 78643K 676 0 ether_multi 1 0K 0K 78643K 48 0 mrt 1 0K 0K 78643K 39 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 217 970K 970K 78643K 217 0 exec 0 0K 2K 78643K 2523 0 pfkey data 0 0K 0K 78643K 2 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 469 777K 1052K 78643K 55754 0 UVM aobj 131 8K 8K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 330 0 NDP 20 0K 2K 78643K 244 0 temp 160 4727K 38519K 78643K 89593 0 kqueue 14 20K 24K 78643K 1062 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 120 631 0 628 8 7 1 3 0 8 0 rtentry 112 699 0 613 4 0 4 4 0 8 0 unpcb 144 5600 0 5585 91 85 6 10 0 8 5 syncache 296 46 0 46 18 18 0 1 0 8 0 tcpqe 32 214 19 214 3 3 0 1 0 8 0 tcpcb 768 2687 0 2681 124 113 11 18 0 8 9 arp 120 99 0 85 1 0 1 1 0 8 0 inpcb 320 7048 0 7039 160 148 12 12 0 8 11 nd6 48 141 0 120 1 0 1 1 0 8 0 pkpcb 40 43 0 43 7 7 0 1 0 8 0 kcovpl 48 42 0 34 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1256 66 0 64 13 12 1 1 0 8 0 pfstscr 40 38 0 38 7 7 0 1 0 8 0 pffrag 232 46 0 44 5 4 1 1 0 482 0 pffrnode 88 46 0 44 5 4 1 1 0 8 0 pffrent 40 197 0 195 5 4 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 319 0 319 4 4 0 1 0 8 0 pfanchor 1280 255 0 46 19 1 18 18 0 8 0 pftag 88 18 0 11 2 1 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 134 0 132 1 0 1 1 0 8 0 pfstkey 120 190 0 188 1 0 1 1 0 8 0 pfstate 336 159 0 157 4 3 1 3 0 8 0 pfrule 1360 668 0 631 10 6 4 4 0 8 0 rttmr 136 9 0 9 3 3 0 1 0 8 0 art_heap8 4096 7 0 6 4 3 1 3 0 8 0 art_heap4 256 2951 0 2575 51 27 24 29 0 8 0 art_table 32 2958 0 2581 4 0 4 4 0 8 0 art_node 16 631 0 556 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semapl 112 814 0 804 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15267 0 13792 93 0 93 93 0 8 0 ffsino 272 15267 0 13792 99 0 99 99 0 8 0 nchpl 144 28671 0 27025 63 0 63 63 0 8 0 rtmask 32 3 0 3 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 110543 0 110543 6 5 1 2 0 8 1 percpumem 16 179 0 137 1 0 1 1 0 8 0 vcpupl 2048 120 0 0 15 0 15 15 0 8 0 vmpool 568 130 0 10 9 0 9 9 0 8 0 pfiaddrpl 120 168 0 168 4 4 0 1 0 8 0 kstatmem 264 298 0 258 3 0 3 3 0 8 0 scsiplug 72 8 0 8 3 3 0 1 0 8 0 scxspl 216 77520 0 77520 29 28 1 8 0 8 1 plimitpl 152 816 0 799 1 0 1 1 0 8 0 sigapl 424 9302 0 9253 9 2 7 8 0 8 0 futexpl 64 77690 0 77686 4 3 1 1 0 8 0 knotepl 120 920 0 0 17 0 17 17 0 8 0 kqueuepl 216 3047 0 3037 53 52 1 5 0 8 0 pipepl 320 1515 0 1488 46 43 3 8 0 8 0 fdescpl 496 9263 0 9234 5 1 4 5 0 8 0 filepl 152 71160 0 70911 159 143 16 19 0 8 6 lockfpl 104 2885 0 2883 8 7 1 2 0 8 0 lockfspl 48 648 0 646 1 0 1 1 0 8 0 sessionpl 144 58 0 41 1 0 1 1 0 8 0 pgrppl 48 135 0 118 1 0 1 1 0 8 0 ucredpl 104 14044 0 14027 1 0 1 1 0 8 0 zombiepl 144 9255 0 9253 2 1 1 1 0 8 0 processpl 1064 9302 0 9253 5 0 5 5 0 8 0 procpl 672 26341 0 26271 17 9 8 10 0 8 0 srpgc 96 46 0 46 16 16 0 1 0 8 0 sosppl 168 101 0 101 24 24 0 1 0 8 0 sockpl 488 13330 0 13303 390 370 20 34 0 8 16 mcl64k 65536 32 0 0 4 2 2 3 0 8 0 mcl16k 16384 23 0 0 3 0 3 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 34 0 0 4 0 4 4 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 475 0 0 44 13 31 44 0 8 0 mtagpl 96 520 0 0 7 0 7 7 0 8 0 mbufpl 256 974 0 0 29 0 29 29 0 8 0 bufpl 288 17239 0 10907 453 0 453 453 0 8 0 anonpl 24 1887887 0 1867574 241 97 144 159 0 186 0 amapchunkpl 152 186475 0 185707 402 292 110 347 0 158 76 amappl16 200 29260 0 28450 145 98 47 56 0 8 0 amappl15 192 2115 0 2107 1 0 1 1 0 8 0 amappl14 184 934 0 929 1 0 1 1 0 8 0 amappl13 176 1071 0 1070 1 0 1 1 0 8 0 amappl12 168 934 0 927 1 0 1 1 0 8 0 amappl11 160 1942 0 1920 3 1 2 2 0 8 0 amappl10 152 526 0 522 1 0 1 1 0 8 0 amappl9 144 2121 0 2113 1 0 1 1 0 8 0 amappl8 136 2417 0 2294 6 1 5 5 0 8 0 amappl7 128 1235 0 1209 1 0 1 1 0 8 0 amappl6 120 2065 0 2046 2 1 1 2 0 8 0 amappl5 112 6935 0 6917 1 0 1 1 0 8 0 amappl4 104 5004 0 4969 3 1 2 2 0 8 0 amappl3 96 28600 0 28548 2 0 2 2 0 8 0 amappl2 88 2462 0 2422 2 0 2 2 0 8 0 amappl1 80 231278 0 230596 25 9 16 20 0 8 0 amappl 88 54431 0 54192 6 0 6 6 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 9393 0 9244 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9393 0 9244 1 0 1 1 0 8 0 vmmpekpl 168 74295 0 74223 5 1 4 4 0 8 0 vmmpepl 168 918433 0 915347 307 159 148 154 0 357 0 vmsppl 368 9392 0 9244 15 1 14 14 0 8 0 rwobjpl 56 234739 0 226726 128 13 115 117 0 8 0 pdppl 4096 18793 0 18608 757 568 189 190 0 8 4 pvpl 32 3792215 0 3770485 355 153 202 243 0 265 0 pmappl 248 9392 0 9244 12 2 10 10 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1614 0 642 28 0 28 28 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82975ff0) 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: 0x7f7fffffb570, count: -3 ddb{0}> machine ddbcpu 1 Stopped at rc4_keysetup+0xaf: divl 0xffffffffffffffac(%rbp),%eax ddb{1}> trace rc4_keysetup(ffff800027be3312,ffff800027be3424,0) at rc4_keysetup+0xaf sys/crypto/arc4.c:41 pipex_mppe_init(ffff800027be32d8,1803,682e,ffff800000dbb26c,1803) at pipex_mppe_init+0x212 sys/net/pipex.c:2319 pipex_init_session(ffff80002e57be48,ffff800000dbb000) at pipex_init_session+0x5e1 pipex_session_init_mppe_recv sys/net/pipex.c:2327 [inline] pipex_init_session(ffff80002e57be48,ffff800000dbb000) at pipex_init_session+0x5e1 sys/net/pipex.c:385 pppacioctl(4086337,82907003,ffff800000dbb000,1,ffff8000212597b0) at pppacioctl+0x156 pppac_add_session sys/net/if_pppx.c:1315 [inline] pppacioctl(4086337,82907003,ffff800000dbb000,1,ffff8000212597b0) at pppacioctl+0x156 sys/net/if_pppx.c:1165 VOP_IOCTL(fffffd8074017a80,82907003,ffff800000dbb000,1,fffffd807f7d7820,ffff8000212597b0) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd8069757be8,82907003,ffff800000dbb000,ffff8000212597b0) at vn_ioctl+0xbc sys/kern/vfs_vnops.c:525 sys_ioctl(ffff8000212597b0,ffff80002e57c198,ffff80002e57c1e0) at sys_ioctl+0x4a2 syscall(ffff80002e57c260) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e57c260) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x775c5d0ac30, count: -9