panic: malloc: allocation too large, type = 2, size = 18446744073709550336 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 12864 24303 0 0 0x4000000 0K syz-executor.0 209309 61275 0 0 0 1 syz-executor.1 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(fffffffffffffb00,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344 vm_get_info(ffff800022b9f8a0) at vm_get_info+0x9d VOP_IOCTL(fffffd806eb47b60,c0185603,ffff800022b9f8a0,1,fffffd807f7c6960,ffff800020abe018) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8064edf7b8,c0185603,ffff800022b9f8a0,ffff800020abe018) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff800020abe018,ffff800022b9f9b8,ffff800022b9fa00) at sys_ioctl+0x5b9 syscall(ffff800022b9fa80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b9fa80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff53,0,3,17922c6f010) at Xsyscall+0x128 end of kernel end trace frame: 0x17b8eda2c90, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic malloc: allocation too large, type = 2, size = 18446744073709550336 ddb{0}> 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(fffffffffffffb00,2,a) at malloc+0x9c9 sys/kern/kern_malloc.c:344 vm_get_info(ffff800022b9f8a0) at vm_get_info+0x9d VOP_IOCTL(fffffd806eb47b60,c0185603,ffff800022b9f8a0,1,fffffd807f7c6960,ffff800020abe018) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd8064edf7b8,c0185603,ffff800022b9f8a0,ffff800020abe018) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 sys_ioctl(ffff800020abe018,ffff800022b9f9b8,ffff800022b9fa00) at sys_ioctl+0x5b9 syscall(ffff800022b9fa80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b9fa80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff53,0,3,17922c6f010) at Xsyscall+0x128 end of kernel end trace frame: 0x17b8eda2c90, count: -9 ddb{0}> show registers rdi 0xffffffff81bdfd17 db_enter+0x17 rsi 0x1c21 __ALIGN_SIZE+0xc21 rbp 0xffff800022b9f4e0 rbx 0xffff800022b9f590 rdx 0x1c22 __ALIGN_SIZE+0xc22 rcx 0xffff800021b90000 rax 0xffff800021b90000 r8 0xffffffff816bf1ff kprintf+0x16f r9 0x1 r10 0x25 r11 0xf81a4fce8216aee4 r12 0x3000000008 r13 0xffff800022b9f4f0 r14 0x100 r15 0x1 rip 0xffffffff81bdfd18 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022b9f4d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=12864 stat=onproc flags process=0 proc=4000000 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020abf160,0xffffffff8265d288 process=0xffff800020a8b510 user=0xffff800022b9a000, vmspace=0xfffffd807f00b5c0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24303 154214 44035 0 2 0 syz-executor.0 *24303 12864 44035 0 7 0x4000000 syz-executor.0 61275 209309 92998 0 7 0 syz-executor.1 61275 378917 92998 0 3 0x4000080 netio syz-executor.1 92998 508341 59569 0 3 0x82 nanosleep syz-executor.1 44035 133835 59569 0 3 0x82 nanosleep syz-executor.0 48231 115711 1 0 3 0x100083 ttyin getty 60873 101210 0 0 3 0x14200 acct acct 13613 131265 0 0 3 0x14200 bored sosplice 59569 383914 85835 0 3 0x82 thrsleep syz-fuzzer 59569 389704 85835 0 3 0x4000082 nanosleep syz-fuzzer 59569 480389 85835 0 3 0x4000082 thrsleep syz-fuzzer 59569 476603 85835 0 3 0x4000082 thrsleep syz-fuzzer 59569 452395 85835 0 3 0x4000082 thrsleep syz-fuzzer 59569 315114 85835 0 3 0x4000082 thrsleep syz-fuzzer 59569 296578 85835 0 3 0x4000082 kqread syz-fuzzer 59569 142923 85835 0 3 0x4000082 thrsleep syz-fuzzer 59569 37108 85835 0 3 0x4000082 thrsleep syz-fuzzer 59569 31154 85835 0 3 0x4000082 thrsleep syz-fuzzer 85835 312506 99343 0 3 0x10008a pause ksh 99343 388120 80172 0 3 0x92 select sshd 80172 170886 1 0 3 0x80 select sshd 14367 126342 46099 74 3 0x100092 bpf pflogd 46099 19256 1 0 3 0x80 netio pflogd 3916 69392 11238 73 3 0x100090 kqread syslogd 11238 364334 1 0 3 0x100082 netio syslogd 10865 489265 1 77 3 0x100090 poll dhclient 32913 196354 1 0 3 0x80 poll dhclient 84929 343761 0 0 2 0x14200 zerothread 5698 230508 0 0 3 0x14200 aiodoned aiodoned 23838 130300 0 0 3 0x14200 syncer update 86836 136334 0 0 3 0x14200 cleaner cleaner 7187 156008 0 0 3 0x14200 reaper reaper 94218 341094 0 0 3 0x14200 pgdaemon pagedaemon 42266 407360 0 0 3 0x14200 bored crynlk 55377 222024 0 0 3 0x14200 bored crypto 25051 76094 0 0 3 0x40014200 acpi0 acpi0 10415 95224 0 0 3 0x40014200 idle1 15363 66256 0 0 3 0x14200 bored softnet 83327 523224 0 0 3 0x14200 bored systqmp 48665 419454 0 0 3 0x14200 bored systq 95683 306473 0 0 3 0x40014200 bored softclock 150 244501 0 0 3 0x40014200 idle0 12103 30658 0 0 3 0x14200 bored smr 1 49714 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 24303 (syz-executor.0) thread 0xffff800020abe018 (12864) shared rwlock vmlistlock r = 0 (0xffff80000066e478) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vm_get_info+0x39 sys/arch/amd64/amd64/vmm.c:3712 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82662188) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9597 6458K 7838K 78643K 20758 0 0 pcb 13 9K 9K 78643K 582 0 0 rtable 118 12K 13K 78643K 1934 0 0 ifaddr 85 19K 22K 78643K 642 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1595 0 0 iov 0 0K 28K 78643K 383 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1205 76K 77K 78643K 5518 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 66 0 0 VM map 2 1K 1K 78643K 10 0 0 sem 12 0K 1K 78643K 559 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 4318 0 0 sigio 0 0K 0K 78643K 73 0 0 proc 62 63K 95K 78643K 1743 0 0 subproc 32 2K 2K 78643K 429 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 376 0 0 in_multi 33 2K 2K 78643K 406 0 0 ether_multi 1 0K 0K 78643K 18 0 0 mrt 0 0K 0K 78643K 11 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 120 530K 530K 78643K 120 0 0 exec 0 0K 1K 78643K 806 0 0 pfkey data 0 0K 4K 78643K 4 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 115 22K 32K 78643K 15664 0 0 UVM aobj 130 6K 6K 78643K 138 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 901 0 0 NDP 20 0K 0K 78643K 203 0 0 temp 228 3556K 4190K 78643K 74596 0 0 kqueue 0 0K 0K 78643K 25 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 53 0 47 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 258 0 256 1 0 1 1 0 8 0 rtentry 112 284 0 240 2 0 2 2 0 8 0 unpcb 120 2213 0 2189 8 7 1 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 5 0 5 4 4 0 1 0 8 0 tcpqe 32 5301 0 5301 1 1 0 1 0 8 0 tcpcb 544 905 0 901 1 0 1 1 0 8 0 inpcb 280 8863 0 8853 14 11 3 4 0 8 1 rttmr 72 3 0 3 2 2 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 1 0 1 1 1 0 1 0 8 0 nd6 48 48 0 44 1 0 1 1 0 8 0 pkpcb 40 25 0 25 12 12 0 1 0 8 0 ppxss 1128 85 0 85 13 12 1 1 0 8 1 pffrag 232 9 0 9 5 5 0 1 0 482 0 pffrnode 88 9 0 9 5 5 0 1 0 8 0 pffrent 40 18 0 18 5 5 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 213 0 179 1 0 1 1 0 8 0 pfstkey 112 213 0 179 2 0 2 2 0 8 0 pfstate 328 213 0 178 6 3 3 4 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 1227 0 1012 19 5 14 15 0 8 0 art_table 32 1228 0 1012 2 0 2 2 0 8 0 art_node 16 272 0 232 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 553 0 543 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 7723 0 6323 46 0 46 46 0 8 0 ffsino 272 7723 0 6323 94 0 94 94 0 8 0 nchpl 144 13871 0 12241 61 0 61 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 48864 0 48864 5 4 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 8 0 8 2 1 1 1 0 8 1 scsiplug 64 2 0 2 2 2 0 1 0 8 0 scxspl 192 39864 0 39864 25 23 2 7 0 8 2 plimitpl 152 413 0 405 1 0 1 1 0 8 0 sigapl 432 4450 0 4434 4 2 2 3 0 8 0 futexpl 56 81725 0 81725 2 1 1 1 0 8 1 knotepl 112 1145 0 1126 2 1 1 2 0 8 0 kqueuepl 104 1135 0 1133 1 0 1 1 0 8 0 pipepl 112 2626 0 2607 7 6 1 2 0 8 0 fdescpl 488 4451 0 4434 3 0 3 3 0 8 0 filepl 152 36827 0 36722 24 18 6 7 0 8 1 lockfpl 104 1665 0 1664 1 0 1 1 0 8 0 lockfspl 48 562 0 561 1 0 1 1 0 8 0 sessionpl 112 42 0 31 1 0 1 1 0 8 0 pgrppl 48 458 0 447 1 0 1 1 0 8 0 ucredpl 96 5216 0 5207 1 0 1 1 0 8 0 zombiepl 144 4434 0 4434 3 2 1 1 0 8 1 processpl 896 4468 0 4434 5 1 4 5 0 8 0 procpl 632 13813 0 13768 9 4 5 5 0 8 1 srpgc 64 46 0 46 19 19 0 1 0 8 0 sosppl 128 61 0 61 14 13 1 1 0 8 1 sockpl 384 11551 0 11515 26 19 7 7 0 8 2 mcl64k 65536 759 0 0 89 25 64 64 0 8 2 mcl16k 16384 32 0 0 4 2 2 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 135 0 0 14 0 14 14 0 8 0 mtagpl 80 35 0 0 1 0 1 1 0 8 0 mbufpl 256 879 0 0 38 1 37 37 0 8 0 bufpl 256 14326 0 7278 441 0 441 441 0 8 0 anonpl 16 443708 0 429603 163 103 60 74 0 124 0 amapchunkpl 152 28973 0 28864 48 43 5 12 0 158 0 amappl16 192 21075 0 20282 138 97 41 52 0 8 0 amappl15 184 700 0 700 3 3 0 1 0 8 0 amappl14 176 670 0 667 2 1 1 1 0 8 0 amappl13 168 530 0 529 5 4 1 1 0 8 0 amappl12 160 809 0 808 2 1 1 1 0 8 0 amappl11 152 946 0 931 1 0 1 1 0 8 0 amappl10 144 308 0 303 1 0 1 1 0 8 0 amappl9 136 1400 0 1392 1 0 1 1 0 8 0 amappl8 128 908 0 873 4 2 2 2 0 8 0 amappl7 120 414 0 407 1 0 1 1 0 8 0 amappl6 112 904 0 891 1 0 1 1 0 8 0 amappl5 104 1144 0 1129 1 0 1 1 0 8 0 amappl4 96 4991 0 4958 1 0 1 1 0 8 0 amappl3 88 725 0 720 1 0 1 1 0 8 0 amappl2 80 33927 0 33846 3 1 2 3 0 8 0 amappl1 72 108845 0 108397 27 17 10 20 0 8 0 amappl 80 14434 0 14395 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 64 137 0 8 3 0 3 3 0 8 0 uaddrrnd 24 4459 0 4434 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4459 0 4434 1 0 1 1 0 8 0 vmmpekpl 168 40568 0 40534 2 0 2 2 0 8 0 vmmpepl 168 557426 0 555401 303 196 107 118 0 357 16 vmsppl 368 4450 0 4434 2 0 2 2 0 8 0 pdppl 4096 8925 0 8884 7 1 6 6 0 8 0 pvpl 32 1203408 0 1185999 348 200 148 178 0 265 2 pmappl 232 4458 0 4442 6 4 2 2 0 8 1 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 726 0 41 20 0 20 20 0 8 0