panic: malloc: allocation too large, type = 2, size = 18446744073709550496 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *372171 15930 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:207 malloc(fffffffffffffba0,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344 vm_get_info(ffff80001531aaa0) at vm_get_info+0x9a VOP_IOCTL(fffffd803a9ca680,c0185603,ffff80001531aaa0,2,fffffd803f7c6ae0,ffff8000ffff2780) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d55a360,c0185603,ffff80001531aaa0,ffff8000ffff2780) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff8000ffff2780,ffff80001531abb8,ffff80001531ac00) at sys_ioctl+0x5b9 syscall(ffff80001531ac80) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff53,0,3,3e8ddbfb010) at Xsyscall+0x128 end of kernel end trace frame: 0x3eb13b5bbf0, count: 6 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 malloc: allocation too large, type = 2, size = 18446744073709550496 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:207 malloc(fffffffffffffba0,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344 vm_get_info(ffff80001531aaa0) at vm_get_info+0x9a VOP_IOCTL(fffffd803a9ca680,c0185603,ffff80001531aaa0,2,fffffd803f7c6ae0,ffff8000ffff2780) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd802d55a360,c0185603,ffff80001531aaa0,ffff8000ffff2780) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff8000ffff2780,ffff80001531abb8,ffff80001531ac00) at sys_ioctl+0x5b9 syscall(ffff80001531ac80) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff53,0,3,3e8ddbfb010) at Xsyscall+0x128 end of kernel end trace frame: 0x3eb13b5bbf0, count: -9 ddb> show registers rdi 0xffffffff8118e297 db_enter+0x17 rsi 0x25a6 __ALIGN_SIZE+0x15a6 rbp 0xffff80001531a6e0 rbx 0xffff80001531a790 rdx 0x25a7 __ALIGN_SIZE+0x15a7 rcx 0xffff800015115000 rax 0xffff800015115000 r8 0xffff80001531a6a0 r9 0x1 r10 0xffff800000a63fc0 r11 0xda0d9c9f60d2beb5 r12 0x3000000008 r13 0xffff80001531a6f0 r14 0x100 r15 0x1 rip 0xffffffff8118e298 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001531a6d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=372171 stat=onproc flags process=0 proc=4000000<THREAD> pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3650,0xffffffff825545b0 process=0xffff8000ffff6d90 user=0xffff800015315000, vmspace=0xfffffd803f013cc0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 15930 280744 51871 0 2 0 syz-executor.0 *15930 372171 51871 0 7 0x4000000 syz-executor.0 51871 327266 64305 0 3 0x82 nanosleep syz-executor.0 50459 513696 64305 0 2 0x2 syz-executor.1 17870 261921 0 0 3 0x14200 acct acct 98046 380824 0 0 3 0x14200 bored sosplice 64305 99042 94260 0 3 0x82 thrsleep syz-fuzzer 64305 245528 94260 0 2 0x4000002 syz-fuzzer 64305 226417 94260 0 3 0x4000082 thrsleep syz-fuzzer 64305 407171 94260 0 3 0x4000082 thrsleep syz-fuzzer 64305 434020 94260 0 2 0x4000002 syz-fuzzer 64305 199498 94260 0 3 0x4000082 thrsleep syz-fuzzer 64305 165057 94260 0 3 0x4000082 thrsleep syz-fuzzer 94260 172367 1787 0 3 0x10008a pause ksh 1787 32424 27543 0 3 0x92 select sshd 50356 333629 1 0 3 0x100083 ttyin getty 27543 88982 1 0 3 0x80 select sshd 27904 364086 24876 73 3 0x100090 kqread syslogd 24876 5883 1 0 3 0x100082 netio syslogd 57733 45955 1 77 3 0x100090 poll dhclient 40547 301515 1 0 3 0x80 poll dhclient 44267 357472 0 0 2 0x14200 zerothread 34604 230467 0 0 3 0x14200 aiodoned aiodoned 49483 439610 0 0 3 0x14200 syncer update 46785 405020 0 0 3 0x14200 cleaner cleaner 4901 265271 0 0 3 0x14200 reaper reaper 21730 507648 0 0 3 0x14200 pgdaemon pagedaemon 82873 335946 0 0 3 0x14200 bored crynlk 47406 347048 0 0 3 0x14200 bored crypto 26537 440216 0 0 3 0x40014200 acpi0 acpi0 82050 185601 0 0 3 0x14200 bored softnet 78136 331070 0 0 3 0x14200 bored systqmp 72669 308589 0 0 3 0x14200 bored systq 70576 262682 0 0 3 0x40014200 bored softclock 2160 331524 0 0 3 0x40014200 idle0 50813 451089 0 0 3 0x14200 bored smr 1 58461 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 9554 6367K 6997K 78643K 23562 0 0 pcb 13 8K 8K 78643K 795 0 0 rtable 114 4K 4K 78643K 2094 0 0 ifaddr 71 18K 19K 78643K 609 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 223 0 0 iov 0 0K 16K 78643K 495 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1210 76K 77K 78643K 6521 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 76 0 0 VM map 2 0K 0K 78643K 9 0 0 sem 12 0K 1K 78643K 956 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 5 13K 25K 78643K 12838 0 0 sigio 0 0K 0K 78643K 38 0 0 proc 50 38K 55K 78643K 1933 0 0 subproc 32 2K 2K 78643K 527 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 435 0 0 in_multi 33 2K 2K 78643K 469 0 0 ether_multi 1 0K 0K 78643K 26 0 0 mrt 0 0K 0K 78643K 16 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 126 556K 556K 78643K 126 0 0 exec 0 0K 1K 78643K 952 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 106 22K 38K 78643K 28698 0 0 UVM aobj 130 4K 4K 78643K 192 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 584 0 0 NDP 18 0K 1K 78643K 205 0 0 temp 198 3536K 4175K 78643K 91880 0 0 kqueue 0 0K 0K 78643K 27 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 64 0 58 1 0 1 1 0 8 0 rtpcb 80 269 0 267 1 0 1 1 0 8 0 rtentry 112 341 0 296 2 0 2 2 0 8 0 unpcb 120 1809 0 1794 3 2 1 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 4 0 4 1 1 0 1 0 8 0 tcpqe 32 5378 0 5378 1 1 0 1 0 8 0 tcpcb 544 1198 0 1194 1 0 1 1 0 8 0 ipq 40 6 0 6 3 3 0 1 0 8 0 ipqe 40 12 0 12 3 3 0 1 0 8 0 inpcb 280 11090 0 11083 23 21 2 3 0 8 1 rttmr 72 2 0 2 2 2 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 62 0 58 1 0 1 1 0 8 0 pkpcb 40 16 0 16 6 6 0 1 0 8 0 ppxss 1128 68 0 68 27 26 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1571 0 1355 24 10 14 16 0 8 0 art_table 32 1572 0 1355 2 0 2 2 0 8 0 art_node 16 337 0 297 1 0 1 1 0 8 0 sysvmsgpl 40 64 0 50 1 0 1 1 0 8 0 semapl 112 954 0 944 1 0 1 1 0 8 0 shmpl 112 190 0 62 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 17325 0 15923 46 0 46 46 0 8 0 ffsino 240 17325 0 15923 83 0 83 83 0 8 0 nchpl 144 34247 0 32624 61 0 61 61 0 8 0 uvmvnodes 72 6992 0 0 128 0 128 128 0 8 0 vnodes 208 6992 0 0 368 0 368 368 0 8 0 namei 1024 96338 0 96338 6 5 1 1 0 8 1 vmpool 520 7 0 7 4 4 0 1 0 8 0 scsiplug 64 6 0 6 5 4 1 1 0 8 1 scxspl 192 94932 0 94932 19 18 1 7 0 8 1 plimitpl 152 410 0 403 1 0 1 1 0 8 0 sigapl 432 12922 0 12909 2 0 2 2 0 8 0 futexpl 56 197627 0 197627 4 3 1 1 0 8 1 knotepl 112 1375 0 1356 2 1 1 2 0 8 0 kqueuepl 104 1222 0 1220 1 0 1 1 0 8 0 pipepl 112 2676 0 2657 7 6 1 2 0 8 0 fdescpl 424 12923 0 12909 2 0 2 2 0 8 0 filepl 120 55909 0 55800 8 4 4 5 0 8 0 lockfpl 104 1540 0 1539 1 0 1 1 0 8 0 lockfspl 48 524 0 523 1 0 1 1 0 8 0 sessionpl 112 46 0 36 1 0 1 1 0 8 0 pgrppl 48 95 0 85 1 0 1 1 0 8 0 ucredpl 96 10042 0 10034 1 0 1 1 0 8 0 zombiepl 144 12911 0 12911 3 2 1 1 0 8 1 processpl 864 12941 0 12911 4 0 4 4 0 8 0 procpl 632 26628 0 26591 4 0 4 4 0 8 0 sosppl 128 2167 0 2167 5 4 1 1 0 8 1 sockpl 384 13234 0 13210 27 23 4 6 0 8 1 mcl64k 65536 393 0 393 54 53 1 29 0 8 1 mcl16k 16384 30 0 30 17 17 0 1 0 8 0 mcl12k 12288 142 0 142 28 27 1 1 0 8 1 mcl9k 9216 50 0 50 25 24 1 1 0 8 1 mcl8k 8192 114 0 114 28 27 1 1 0 8 1 mcl4k 4096 316 0 316 13 12 1 1 0 8 1 mcl2k2 2112 29 0 29 18 17 1 1 0 8 1 mcl2k 2048 75045 0 75000 33 26 7 15 0 8 1 mtagpl 80 316 0 316 12 12 0 3 0 8 0 mbufpl 256 184847 0 184731 65 55 10 30 0 8 0 bufpl 256 27186 0 20177 439 0 439 439 0 8 0 anonpl 16 944370 0 933951 229 161 68 71 0 62 10 amapchunkpl 152 47730 0 47626 54 48 6 18 0 158 1 amappl16 192 57367 0 56592 201 155 46 52 0 8 6 amappl15 184 1488 0 1486 1 0 1 1 0 8 0 amappl14 176 3138 0 3135 2 1 1 1 0 8 0 amappl13 168 2004 0 2004 6 5 1 1 0 8 1 amappl12 160 963 0 958 1 0 1 1 0 8 0 amappl11 152 1559 0 1548 1 0 1 1 0 8 0 amappl10 144 2900 0 2899 1 0 1 1 0 8 0 amappl9 136 1810 0 1804 1 0 1 1 0 8 0 amappl8 128 1316 0 1281 4 2 2 2 0 8 0 amappl7 120 3052 0 3045 1 0 1 1 0 8 0 amappl6 112 1495 0 1486 1 0 1 1 0 8 0 amappl5 104 1334 0 1321 1 0 1 1 0 8 0 amappl4 96 12563 0 12537 1 0 1 1 0 8 0 amappl3 88 3624 0 3616 1 0 1 1 0 8 0 amappl2 80 103064 0 102997 4 2 2 3 0 8 0 amappl1 72 244857 0 244453 28 19 9 20 0 8 0 amappl 80 27327 0 27292 1 0 1 1 0 84 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 64 191 0 62 3 0 3 3 0 8 0 uaddrrnd 24 12930 0 12909 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 12930 0 12909 1 0 1 1 0 8 0 vmmpekpl 168 60365 0 60338 2 0 2 2 0 8 0 vmmpepl 168 1478301 0 1476479 464 355 109 114 0 357 25 vmsppl 272 12922 0 12909 3 2 1 2 0 8 0 pdppl 4096 25866 0 25832 6 1 5 6 0 8 0 pvpl 32 2717823 0 2704322 511 344 167 217 0 265 26 pmappl 200 12929 0 12916 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 778 0 210 17 0 17 17 0 8 0