panic: malloc: allocation too large, type = 31, size = 4294965210 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *453907 2184 0 0x10 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8309df59) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff80003b985c10,ffff80003c618de0,ffff80003c618d30) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c618de0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c618de0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x524be35d8b0, count: 9 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 *cpu0: malloc: allocation too large, type = 31, size = 4294965210 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8309df59) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff80003b985c10,ffff80003c618de0,ffff80003c618d30) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c618de0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c618de0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x524be35d8b0, count: -6 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c618a50 rbx 0xffffffff834d1dc7 cpu_info_full_primary+0x2dc7 rdx 0xffff80000127fb00 rcx 0xffff80003b985c10 rax 0xffffffff834d0ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5448508aba53ca1a r11 0x952d04df3cc7c1c1 r12 0xffffffff834d1bc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff8176dda5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c618a40 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=453907 pid=2184 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a430cf0,0xffffffff835dd0c0 process=0xffff80003b98f4b0 user=0xffff80003c613000, vmspace=0xfffffd807eb8d1c8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2184 150130 32363 0 2 0x10 syz-executor * 2184 453907 32363 0 7 0x4000010 syz-executor 58583 195089 83690 0 2 0 syz-executor 58583 275172 83690 0 3 0x4000080 rest syz-executor 46210 371964 78291 0 2 0 syz-executor 46210 343148 78291 0 3 0x4000080 fsleep syz-executor 86011 20438 14452 0 2 0 syz-executor 86011 422883 14452 0 3 0x4000080 fsleep syz-executor 13490 330901 74879 0 2 0 syz-executor 13490 381457 74879 0 3 0x4000080 fsleep syz-executor 13490 234192 74879 0 3 0x4000080 fsleep syz-executor 13490 206143 74879 0 3 0x4000080 fsleep syz-executor 91333 441399 95064 0 3 0x80 nanoslp syz-executor 91333 295411 95064 0 3 0x4000080 dtread syz-executor 91333 413341 95064 0 3 0x4000080 fsleep syz-executor 51781 431263 27556 0 3 0x80 nanoslp syz-executor 51781 313537 27556 0 3 0x4000080 nanoslp syz-executor 51781 104928 27556 0 3 0x4000080 fsleep syz-executor 8515 252587 14686 60929 3 0x90 nanoslp syz-executor 8515 346825 14686 60929 3 0x4000090 sbwait syz-executor 8515 357567 14686 60929 3 0x4000010 inode syz-executor 8515 403169 14686 60929 3 0x4000010 inode syz-executor 8515 95572 14686 60929 3 0x4000010 inode syz-executor 8515 403196 14686 60929 3 0x4000090 fsleep syz-executor 9122 163831 1 0 3 0x80 nanoslp init 74879 46265 21212 0 3 0x82 nanoslp syz-executor 78291 351996 21212 0 3 0x82 nanoslp syz-executor 60877 89386 58509 0 3 0x82 sbwait sshd-session 83690 101528 21212 0 3 0x82 nanoslp syz-executor 20054 318920 0 0 3 0x14200 bored sosplice 95064 173240 21212 0 3 0x82 nanoslp syz-executor 14686 499018 21212 0 3 0x82 nanoslp syz-executor 27556 286649 21212 0 3 0x82 nanoslp syz-executor 32363 492535 21212 0 3 0x82 nanoslp syz-executor 14452 274132 21212 0 3 0x82 nanoslp syz-executor 21212 45416 40337 0 2 0x2 syz-executor 40337 226286 4483 0 3 0x10008a sigsusp ksh 4483 410874 83289 0 3 0x98 kqread sshd-session 83289 293598 58509 0 3 0x92 kqread sshd-session 58509 341398 1 0 3 0x88 kqread sshd 74589 121579 12167 74 3 0x1100092 bpf pflogd 12167 21740 1 0 3 0x80 sbwait pflogd 27395 15562 27640 73 3 0x1100090 kqread syslogd 27640 320065 1 0 3 0x100082 sbwait syslogd 75228 148769 1 0 3 0x100080 kqread resolvd 31583 43907 76291 77 3 0x100092 kqread dhcpleased 96660 319151 76291 77 3 0x100092 kqread dhcpleased 76291 190537 1 0 3 0x80 kqread dhcpleased 55731 64383 0 0 3 0x14200 bored smr 80743 342839 0 0 2 0x14200 zerothread 44622 170197 0 0 3 0x14200 aiodoned aiodoned 88891 256633 0 0 3 0x14200 syncer update 87068 219065 0 0 3 0x14200 cleaner cleaner 41161 116878 0 0 3 0x14200 reaper reaper 32698 145010 0 0 3 0x14200 pgdaemon pagedaemon 64599 196040 0 0 3 0x14200 bored viomb 84036 186651 0 0 3 0x40014200 acpi0 acpi0 7110 1718 0 0 7 0x40014200 idle1 4137 437583 0 0 3 0x14200 bored softnet3 3648 98265 0 0 3 0x14200 bored softnet2 97083 286380 0 0 3 0x14200 bored softnet1 14020 349335 0 0 3 0x14200 bored softnet0 4098 364363 0 0 3 0x14200 bored systqmp 31495 367923 0 0 3 0x14200 bored systq 77918 226578 0 0 3 0x14200 tmoslp softclockmp 86828 519480 0 0 3 0x40014200 tmoslp softclock 14269 435963 0 0 3 0x40014200 idle0 1 86493 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 2184 (syz-executor) thread 0xffff80003b985c10 (453907) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8356f038) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 Process 8515 (syz-executor) thread 0xffff80003b985700 (346825) exclusive rrwlock inode r = 0 (0xfffffd807aff5738) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #9 namei+0x7aa sys/kern/vfs_lookup.c:250 #10 vn_open+0x13f sys/kern/vfs_vnops.c:140 #11 vndioctl+0xcb1 sys/dev/vnd.c:457 #12 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #13 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #14 sys_ioctl+0x5c3 #15 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #15 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #16 Xsyscall+0x128 Process 8515 (syz-executor) thread 0xffff8000ffffd448 (357567) exclusive rrwlock inode r = 0 (0xfffffd807aff5ee0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1575 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 11116K 11755K 166960K 17775 0 pcb 17 20K 22K 166960K 1077 0 rtable 161 7K 9K 166960K 891 0 pf 35 17K 21K 166960K 175 0 ifaddr 32 5K 8K 166960K 128 0 ifgroup 51 2K 2K 166960K 219 0 sysctl 4 1K 3K 166960K 13 0 counters 62 36K 37K 166960K 166 0 ioctlops 0 0K 4K 166960K 1848 0 iov 0 0K 32K 166960K 480 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1450 91K 92K 166960K 4790 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 18K 166960K 71 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 162 0 dirhash 12 2K 3K 166960K 123 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 89K 166960K 3954 0 sigio 0 0K 0K 166960K 183 0 proc 63 79K 127K 166960K 1149 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 475 0 in_multi 55 4K 7K 166960K 294 0 ether_multi 1 0K 0K 166960K 23 0 mrt 2 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 1071 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 269 75K 91K 166960K 39672 0 UVM aobj 349 77K 77K 166960K 357 0 pinsyscall 44 88K 104K 166960K 5331 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 234 0 NDP 11 0K 2K 166960K 94 0 temp 82 6901K 7010K 166960K 147073 0 kqueue 16 26K 34K 166960K 713 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 665 0 662 9 6 3 3 0 8 2 rtentry 112 267 0 202 4 0 4 4 0 8 0 unpcb 144 3385 0 3359 30 26 4 7 0 8 3 syncache 336 30 0 30 8 8 0 1 0 8 0 tcpqe 32 13 0 13 6 6 0 1 0 8 0 tcpcb 808 1475 0 1460 38 28 10 14 0 8 8 arp 120 53 0 41 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 376 5540 0 5519 92 81 11 15 0 8 8 nd6 136 52 0 38 1 0 1 1 0 8 0 pkpcb 40 24 0 24 8 7 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 28 0 28 12 11 1 1 0 8 1 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 25 0 19 1 0 1 1 0 482 0 pffrnode 88 23 0 17 1 0 1 1 0 8 0 pffrent 40 48 0 42 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 240 0 146 1 0 1 1 0 8 0 pfstkey 128 244 0 150 4 0 4 4 0 8 0 pfstate 376 241 0 148 10 0 10 10 0 8 0 pfrule 1344 25 0 20 2 1 1 2 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1052 0 750 42 11 31 31 0 8 6 art_table 32 1057 0 750 4 0 4 4 0 8 0 art_node 16 252 0 194 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 10 1 0 1 1 0 8 0 semupl 112 4 0 4 3 3 0 1 0 8 0 semapl 112 152 0 142 1 0 1 1 0 8 0 shmpl 112 354 0 8 10 0 10 10 0 8 0 dirhash 1024 93 0 76 3 0 3 3 0 8 0 dino2pl 256 8790 0 7268 96 0 96 96 0 8 0 ffsino 280 8790 0 7268 110 0 110 110 0 8 0 nchpl 144 14663 0 14111 64 39 25 64 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 52687 0 52684 7 6 1 2 0 8 0 percpumem 16 97 0 52 1 0 1 1 0 8 0 kstatmem 264 126 0 104 5 3 2 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 19 0 19 10 9 1 1 0 8 1 scxspl 216 43442 0 43442 18 16 2 8 1 8 2 plimitpl 152 1019 0 1001 1 0 1 1 0 8 0 sigapl 424 4316 0 4264 10 3 7 9 0 8 0 futexpl 64 60463 0 60455 1 0 1 1 0 8 0 knotepl 120 889 0 0 25 0 25 25 0 8 0 kqueuepl 216 1436 0 1423 16 11 5 5 0 8 4 pipepl 328 527 0 499 3 0 3 3 0 8 0 fdescpl 504 4271 0 4238 5 0 5 5 0 8 0 filepl 152 32666 0 32419 57 40 17 18 0 8 5 lockfpl 104 2050 0 2047 4 2 2 2 0 8 1 lockfspl 48 631 0 628 1 0 1 1 0 8 0 sessionpl 144 60 0 51 1 0 1 1 0 8 0 pgrppl 48 125 0 108 1 0 1 1 0 8 0 ucredpl 104 5495 0 5478 1 0 1 1 0 8 0 zombiepl 144 4836 0 4836 3 2 1 1 0 8 1 processpl 1168 4316 0 4264 6 2 4 6 0 8 0 procpl 648 10825 0 10757 10 3 7 8 0 8 0 srpgc 96 34 0 34 9 8 1 1 0 8 1 sosppl 168 21 0 21 6 5 1 1 0 8 1 sockpl 688 9668 0 9618 115 102 13 23 0 8 8 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 123 0 0 15 0 15 15 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 141 0 0 4 0 4 4 0 8 0 mbufpl 256 1601 0 0 95 0 95 95 0 8 0 bufpl 280 13140 0 6974 441 0 441 441 0 8 0 anonpl 24 552281 0 545429 192 118 74 78 0 185 18 amapchunkpl 152 130308 0 129586 81 41 40 41 0 158 9 amappl16 200 13297 0 13191 155 140 15 27 0 8 8 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 184 0 171 1 0 1 1 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 5031 0 4999 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 6 0 6 2 2 0 1 0 8 0 amappl9 144 254 0 253 2 1 1 1 0 8 0 amappl8 136 40 0 37 1 0 1 1 0 8 0 amappl7 128 156 0 143 1 0 1 1 0 8 0 amappl6 120 245 0 240 1 0 1 1 0 8 0 amappl5 112 147 0 136 1 0 1 1 0 8 0 amappl4 104 476 0 457 1 0 1 1 0 8 0 amappl3 96 27533 0 27401 6 2 4 4 0 8 0 amappl2 88 1002 0 932 2 0 2 2 0 8 0 amappl1 80 26152 0 25518 16 0 16 16 0 8 0 amappl 88 38807 0 38597 5 0 5 5 0 92 0 dma65536 65536 2 0 2 1 1 0 1 0 8 0 dma32768 32768 3 0 3 2 2 0 1 0 8 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 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 3 3 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 356 0 8 7 0 7 7 0 8 0 uaddrrnd 24 4271 0 4238 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4271 0 4238 1 0 1 1 0 8 0 vmmpekpl 168 34222 0 34168 4 1 3 3 0 8 0 vmmpepl 168 270318 0 268168 167 59 108 108 0 357 9 vmsppl 456 4270 0 4238 7 2 5 5 0 8 0 rwobjpl 64 76795 0 69392 134 9 125 125 0 8 1 pdppl 4096 8549 0 8476 167 94 73 83 0 8 0 pvpl 32 20516 0 0 165 0 165 165 0 265 0 pmappl 248 4270 0 4238 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 516 0 166 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8309df59) at panic+0x1e5 sys/kern/subr_prf.c:198 malloc(fffff7da,1f,1) at malloc+0xcf4 sys/kern/kern_malloc.c:334 sys_semop(ffff80003b985c10,ffff80003c618de0,ffff80003c618d30) at sys_semop+0x234 sys/kern/sysv_sem.c:564 syscall(ffff80003c618de0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c618de0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x524be35d8b0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b5bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b5bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029b5bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu.c:1218 sched_idle(ffff800029b5bff0) at sched_idle+0x558 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5