panic: malloc: allocation too large, type = 98, size = 760898376 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *366334 70733 0 0x2 0 0 syz-executor3062 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218 malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344 amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338 amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393 uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109 sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline] sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423 syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd81c0, 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 = 98, size = 760898376 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218 malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344 amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338 amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393 uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109 sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline] sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423 syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd81c0, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d91f1f0 rbx 0xffff80001d91f200 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff811f91f0 kprintf+0x140 r9 0x1 r10 0x83ad1e7d3c1054f5 r11 0xb62d605af128619b r12 0x3000000008 r13 0xffff80001d91f2a0 r14 0x100 r15 0x1 rip 0xffffffff81506bd8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d91f1e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor3062) pid=366334 stat=onproc flags process=2 proc=0 pri=53, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff80001d8fcc68,0xffffffff827db0d8 process=0xffff80001d8fe3c8 user=0xffff80001d91a000, vmspace=0xfffffd806bc0a880 estcpu=3, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *70733 366334 58819 0 7 0x2 syz-executor3062 58819 206191 7567 0 3 0x10008a pause ksh 7567 41459 83690 0 3 0x92 select sshd 32299 496488 1 0 3 0x100083 ttyin getty 83690 168893 1 0 3 0x80 select sshd 7862 194759 12669 73 3 0x100090 kqread syslogd 12669 342253 1 0 3 0x100082 netio syslogd 28075 477893 1 77 3 0x100090 poll dhclient 27706 414274 1 0 3 0x80 poll dhclient 25846 407789 0 0 3 0x14200 bored smr 93397 276521 0 0 2 0x14200 zerothread 52438 238550 0 0 3 0x14200 aiodoned aiodoned 61459 271481 0 0 3 0x14200 syncer update 7475 268871 0 0 3 0x14200 cleaner cleaner 38162 215346 0 0 3 0x14200 reaper reaper 15405 76264 0 0 3 0x14200 pgdaemon pagedaemon 93380 407255 0 0 3 0x14200 bored crynlk 62787 459969 0 0 3 0x14200 bored crypto 74577 293832 0 0 3 0x40014200 acpi0 acpi0 14677 51560 0 0 3 0x14200 bored softnet 43145 112191 0 0 3 0x14200 bored systqmp 72837 146343 0 0 3 0x14200 bored systq 21883 449755 0 0 3 0x40014200 bored softclock 31651 185149 0 0 3 0x40014200 idle0 1 521466 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 devbuf 9438 6318K 6319K 78643K 10536 0 pcb 13 8K 8K 78643K 13 0 rtable 61 1K 2K 78643K 117 0 ifaddr 24 7K 7K 78643K 24 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 13 0 mount 1 1K 1K 78643K 1 0 vnodes 1182 74K 74K 78643K 1187 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 0K 0K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 1 0K 0K 78643K 1 0 proc 47 38K 46K 78643K 284 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 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 261 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 32 1K 2K 78643K 511 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 3 0K 0K 78643K 3 0 temp 18 3945K 4009K 78643K 1435 0 kqueue 2 2K 2K 78643K 2 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 2 0 0 1 0 1 1 0 8 0 rtpcb 96 15 0 13 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 27 0 19 1 0 1 1 0 8 0 syncache 272 5 0 5 2 1 1 1 0 8 1 tcpcb 592 8 0 5 1 0 1 1 0 8 0 inpcb 296 22 0 16 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 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 1389 0 15 86 0 86 86 0 8 0 ffsino 240 1389 0 15 81 0 81 81 0 8 0 nchpl 144 1563 0 31 57 0 57 57 0 8 0 uvmvnodes 72 1398 0 0 26 0 26 26 0 8 0 vnodes 208 1398 0 0 74 0 74 74 0 8 0 namei 1024 3489 0 3489 2 1 1 1 0 8 1 scxspl 192 3094 0 3094 1 0 1 1 0 8 1 plimitpl 152 13 0 8 1 0 1 1 0 8 0 sigapl 424 191 0 166 4 0 4 4 0 8 0 knotepl 112 5 0 0 1 0 1 1 0 8 0 kqueuepl 152 1 0 0 1 0 1 1 0 8 0 pipepl 272 57 0 53 2 1 1 1 0 8 0 fdescpl 432 177 0 166 2 0 2 2 0 8 0 filepl 120 822 0 779 2 0 2 2 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 120 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 57 0 50 1 0 1 1 0 8 0 zombiepl 144 166 0 166 2 1 1 1 0 8 1 processpl 944 191 0 166 4 0 4 4 0 8 0 procpl 632 191 0 166 3 0 3 3 0 8 0 sockpl 400 64 0 48 2 0 2 2 0 8 0 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 5409 0 5381 8 2 6 6 0 8 2 mtagpl 96 2 0 2 1 1 0 1 0 8 0 mbufpl 256 9410 0 9369 5 1 4 4 0 8 0 bufpl 280 1837 0 105 124 0 124 124 0 8 0 anonpl 16 17691 0 16566 7 2 5 7 0 107 0 amapchunkpl 152 468 0 433 3 1 2 3 0 158 0 amappl16 192 73 0 69 1 0 1 1 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl13 168 12 0 11 2 1 1 1 0 8 0 amappl12 160 6 0 6 1 1 0 1 0 8 0 amappl11 152 39 0 30 1 0 1 1 0 8 0 amappl10 144 7 0 5 1 0 1 1 0 8 0 amappl9 136 190 0 190 1 1 0 1 0 8 0 amappl8 128 61 0 57 1 0 1 1 0 8 0 amappl7 120 207 0 205 1 0 1 1 0 8 0 amappl6 112 92 0 81 1 0 1 1 0 8 0 amappl5 104 288 0 281 1 0 1 1 0 8 0 amappl4 96 254 0 230 1 0 1 1 0 8 0 amappl3 88 51 0 46 1 0 1 1 0 8 0 amappl2 80 748 0 700 3 1 2 2 0 8 0 amappl1 72 12784 0 12403 14 6 8 14 0 8 0 amappl 80 349 0 330 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 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 177 0 166 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 177 0 166 1 0 1 1 0 8 0 vmmpekpl 168 5206 0 5192 1 0 1 1 0 8 0 vmmpepl 168 26150 0 25410 44 8 36 44 0 357 2 vmsppl 272 176 0 166 1 0 1 1 0 8 0 pdppl 4096 360 0 332 5 0 5 5 0 8 0 pvpl 32 72251 0 69521 29 3 26 26 0 265 1 pmappl 200 176 0 166 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 209 0 9 6 0 6 6 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218 malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344 amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338 amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393 uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109 sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline] sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423 syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd81c0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82398933) at panic+0x15e sys/kern/subr_prf.c:218 malloc(2d5a6348,62,1) at malloc+0x9bd sys/kern/kern_malloc.c:344 amap_alloc1(5ab4c68c,1,0) at amap_alloc1+0x207 sys/uvm/uvm_amap.c:338 amap_alloc(5ab4c68c000,1,0) at amap_alloc+0x80 sys/uvm/uvm_amap.c:393 uvm_mapanon(fffffd806bc0a880,ffff80001d91f5d8,5ab4c68c000,0,1030700) at uvm_mapanon+0x8b9 sys/uvm/uvm_map.c:1109 sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c uvm_mmapanon sys/uvm/uvm_mmap.c:949 [inline] sys_mmap(ffff80001d8fc010,ffff80001d91f688,ffff80001d91f6d0) at sys_mmap+0x98c sys/uvm/uvm_mmap.c:423 syscall(ffff80001d91f750) at syscall+0x507 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd81c0, count: -9 ddb>