panic: mallocarray: overflow 18446744071562067968 * 8 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *379437 10767 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:208 __assert(ffffffff80000000,8,2,2) at __assert wsmux_getmux(7fffffff) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152 wsmux_add_mux(7fffffff,ffff800000669100) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594 VOP_IOCTL(fffffd8030b012b0,80085761,ffff800014a2ea10,82,fffffd803f7c6a80,ffff8000ffff4970) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802e9c5e20,80085761,ffff800014a2ea10,ffff8000ffff4970) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000ffff4970,ffff800014a2eb58,ffff800014a2eb40) at sys_ioctl+0x638 syscall(ffff800014a2ebf0) at syscall+0x541 Xsyscall(6,0,ffffffffffffff86,0,3,67472319010) at Xsyscall+0x128 end of kernel end trace frame: 0x676983f4320, count: 5 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic mallocarray: overflow 18446744071562067968 * 8 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:208 __assert(ffffffff80000000,8,2,2) at __assert wsmux_getmux(7fffffff) at wsmux_getmux+0x71 sys/dev/wscons/wsmux.c:152 wsmux_add_mux(7fffffff,ffff800000669100) at wsmux_add_mux+0x2f sys/dev/wscons/wsmux.c:594 VOP_IOCTL(fffffd8030b012b0,80085761,ffff800014a2ea10,82,fffffd803f7c6a80,ffff8000ffff4970) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:290 vn_ioctl(fffffd802e9c5e20,80085761,ffff800014a2ea10,ffff8000ffff4970) at vn_ioctl+0xc9 sys/kern/vfs_vnops.c:512 sys_ioctl(ffff8000ffff4970,ffff800014a2eb58,ffff800014a2eb40) at sys_ioctl+0x638 syscall(ffff800014a2ebf0) at syscall+0x541 Xsyscall(6,0,ffffffffffffff86,0,3,67472319010) at Xsyscall+0x128 end of kernel end trace frame: 0x676983f4320, count: -10 ddb> show registers rdi 0xffffffff81a24927 db_enter+0x17 rsi 0x158d __ALIGN_SIZE+0x58d rbp 0xffff800014a2e650 rbx 0xffff800014a2e700 rdx 0x158e __ALIGN_SIZE+0x58e rcx 0xffff80000113b000 rax 0xffff80000113b000 r8 0xffff800014a2e610 r9 0x1 r10 0xffff800000936b40 r11 0x5b2a05b670f05c63 r12 0x3000000008 r13 0xffff800014a2e660 r14 0x100 r15 0x1 rip 0xffffffff81a24928 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800014a2e640 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=379437 stat=onproc flags process=0 proc=4000000 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5078,0xffffffff82253390 process=0xffff8000ffff6d30 user=0xffff800014a29000, vmspace=0xfffffd803f014528 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 10767 356837 5192 0 2 0 syz-executor.0 *10767 379437 5192 0 7 0x4000000 syz-executor.0 5192 437275 84825 0 3 0x82 nanosleep syz-executor.0 4528 427365 84825 0 2 0x2 syz-executor.1 44136 8867 1 0 3 0x100083 ttyin getty 69198 285295 0 0 3 0x14200 bored sosplice 84825 263287 37853 0 3 0x82 thrsleep syz-fuzzer 84825 499244 37853 0 3 0x4000082 thrsleep syz-fuzzer 84825 232500 37853 0 3 0x4000082 thrsleep syz-fuzzer 84825 456756 37853 0 3 0x4000082 kqread syz-fuzzer 84825 52361 37853 0 3 0x4000082 thrsleep syz-fuzzer 84825 439406 37853 0 3 0x4000082 thrsleep syz-fuzzer 84825 181860 37853 0 3 0x4000082 thrsleep syz-fuzzer 84825 474061 37853 0 3 0x4000082 thrsleep syz-fuzzer 37853 16655 54582 0 3 0x10008a pause ksh 54582 310821 35484 0 3 0x92 select sshd 35484 332744 1 0 3 0x80 select sshd 96278 51768 89329 73 3 0x100010 ffs_fsync syslogd 89329 43109 1 0 3 0x100082 netio syslogd 43320 12476 1 77 3 0x100090 poll dhclient 4955 5841 1 0 3 0x80 poll dhclient 40087 508188 0 0 2 0x14200 zerothread 15446 307377 0 0 3 0x14200 aiodoned aiodoned 29543 85677 0 0 3 0x14200 syncer update 482 39493 0 0 3 0x14200 cleaner cleaner 13535 438085 0 0 3 0x14200 reaper reaper 40312 252916 0 0 3 0x14200 pgdaemon pagedaemon 63285 224956 0 0 3 0x14200 bored crynlk 64205 89950 0 0 3 0x14200 bored crypto 26134 236363 0 0 3 0x40014200 acpi0 acpi0 99560 444705 0 0 3 0x14200 bored softnet 94962 212877 0 0 3 0x14200 bored systqmp 84707 123875 0 0 3 0x14200 bored systq 38398 447897 0 0 3 0x40014200 bored softclock 16578 54739 0 0 3 0x40014200 idle0 19883 417826 0 0 3 0x14200 bored smr 1 63046 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 Kern Lim devbuf 9496 10452K 10452K 78643K 11070 0 0 pcb 23 9K 11K 78643K 731 0 0 rtable 100 3K 3K 78643K 776 0 0 ifaddr 53 13K 13K 78643K 265 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 32 0 0 iov 0 0K 24K 78643K 186 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1195 75K 76K 78643K 2003 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 23 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 1K 1K 78643K 183 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12537 0 0 file desc 5 13K 21K 78643K 1177 0 0 sigio 0 0K 0K 78643K 24 0 0 proc 41 30K 46K 78643K 610 0 0 subproc 64 65538K 67586K 78643K 447 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 148 0 0 in_multi 33 2K 2K 78643K 188 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 90 397K 397K 78643K 90 0 0 exec 0 0K 1K 78643K 346 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 76 20K 22K 78643K 3638 0 0 UVM aobj 58 4K 4K 78643K 68 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 86 0 0 NDP 12 0K 0K 78643K 86 0 0 temp 155 2355K 2427K 78643K 6817 0 0 kqueue 0 0K 0K 78643K 6 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 15 0 11 1 0 1 1 0 8 0 inpcbpl 280 624 0 617 1 0 1 1 0 8 0 plimitpl 152 66 0 59 1 0 1 1 0 8 0 rtentry 112 140 0 100 2 0 2 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 216 0 212 1 0 1 1 0 8 0 nd6 48 26 0 22 1 0 1 1 0 8 0 ppxss 1128 28 0 28 6 6 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 645 0 457 12 0 12 12 0 8 0 art_table 32 646 0 457 2 0 2 2 0 8 0 art_node 16 139 0 105 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 181 0 171 1 0 1 1 0 8 0 shmpl 112 66 0 10 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3551 0 2103 47 0 47 47 0 8 0 ffsino 240 3551 0 2103 87 1 86 86 0 8 0 nchpl 144 5396 0 3743 63 1 62 62 0 8 0 uvmvnodes 72 3868 0 0 71 0 71 71 0 8 0 vnodes 200 3868 0 0 204 0 204 204 0 8 0 namei 1024 16942 0 16942 2 1 1 1 0 8 1 scsiplug 64 3 0 3 2 2 0 1 0 8 0 scxspl 192 18816 0 18815 12 11 1 6 0 8 0 sigapl 432 1315 0 1302 2 0 2 2 0 8 0 futexpl 56 19399 0 19399 1 0 1 1 0 8 1 knotepl 112 512 0 493 1 0 1 1 0 8 0 kqueuepl 104 355 0 353 1 0 1 1 0 8 0 pipepl 112 972 0 951 6 5 1 2 0 8 0 fdescpl 424 1316 0 1302 2 0 2 2 0 8 0 filepl 120 8596 0 8498 6 2 4 5 0 8 1 lockfpl 104 366 0 364 4 3 1 1 0 8 0 lockfspl 32 407 0 406 4 3 1 1 0 8 0 sessionpl 112 29 0 19 1 0 1 1 0 8 0 pgrppl 48 45 0 35 1 0 1 1 0 8 0 ucredpl 96 2029 0 2022 1 0 1 1 0 8 0 zombiepl 144 1302 0 1302 2 1 1 1 0 8 1 processpl 840 1331 0 1302 4 0 4 4 0 8 0 procpl 600 2795 0 2758 4 0 4 4 0 8 1 sosppl 128 28 0 28 6 6 0 1 0 8 0 sockpl 384 1233 0 1216 4 1 3 4 0 8 1 mcl64k 65536 286 0 286 37 24 13 32 0 8 13 mcl16k 16384 9 0 9 7 7 0 1 0 8 0 mcl12k 12288 28 0 28 7 6 1 1 0 8 1 mcl9k 9216 18 0 18 7 6 1 1 0 8 1 mcl8k 8192 18 0 18 7 6 1 1 0 8 1 mcl4k 4096 64 0 64 6 5 1 1 0 8 1 mcl2k2 2112 10 0 10 5 5 0 1 0 8 0 mcl2k 2048 49314 0 49278 16 11 5 11 0 8 0 mtagpl 80 2 0 2 1 1 0 1 0 8 0 mbufpl 256 87856 0 87779 32 25 7 22 0 8 0 bufpl 256 9271 0 3560 358 0 358 358 0 8 0 anonpl 16 167343 0 159955 81 41 40 54 0 62 1 amapchunkpl 152 5881 0 5801 19 14 5 13 0 158 1 amappl16 192 8102 0 7609 91 64 27 38 0 8 1 amappl15 184 152 0 147 1 0 1 1 0 8 0 amappl14 176 158 0 155 2 1 1 1 0 8 0 amappl13 168 531 0 528 1 0 1 1 0 8 0 amappl12 160 214 0 213 4 3 1 1 0 8 0 amappl11 152 92 0 80 1 0 1 1 0 8 0 amappl10 144 324 0 320 2 1 1 1 0 8 0 amappl9 136 787 0 784 1 0 1 1 0 8 0 amappl8 128 353 0 335 1 0 1 1 0 8 0 amappl7 120 314 0 306 1 0 1 1 0 8 0 amappl6 112 112 0 105 1 0 1 1 0 8 0 amappl5 104 259 0 249 1 0 1 1 0 8 0 amappl4 96 1430 0 1404 2 1 1 2 0 8 0 amappl3 88 385 0 379 1 0 1 1 0 8 0 amappl2 80 10727 0 10677 2 0 2 2 0 8 0 amappl1 72 32520 0 32109 26 17 9 19 0 8 0 amappl 72 3085 0 3053 1 0 1 1 0 75 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 67 0 10 1 0 1 1 0 8 0 uaddrrnd 24 1316 0 1302 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1316 0 1302 1 0 1 1 0 8 0 vmmpekpl 168 13153 0 13131 2 0 2 2 0 8 0 vmmpepl 168 152030 0 150611 144 64 80 84 0 357 12 vmsppl 264 1315 0 1302 3 2 1 2 0 8 0 pdppl 4096 2638 0 2604 5 0 5 5 0 8 0 pvpl 32 522087 0 511551 227 106 121 188 0 265 19 pmappl 192 1315 0 1302 1 0 1 1 0 8 0 extentpl 40 39 0 25 1 0 1 1 0 8 0 phpool 112 576 0 82 15 0 15 15 0 8 0