panic: malloc: allocation too large, type = 2, size = 184467440737095p5an12ic9:6 ke rnel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 690 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 376410 10139 0 0 0x4000000 0 syz-executor.1 *261399 94384 0 0 0x4000000 1 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 __assert(ffffffff8220282e,ffffffff821f0ad1,2b2,ffffffff821d1b09) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 11 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic malloc: allocation too large, type = 2, size = 18446744073709551296 ddb{1}> 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 __assert(ffffffff8220282e,ffffffff821f0ad1,2b2,ffffffff821d1b09) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b55590 rbx 0xffff800020b55640 rdx 0xffff800020ab0780 rcx 0 rax 0 r8 0xffffffff8216e5cf kprintf+0x16f r9 0x1 r10 0x25 r11 0x59c57b7c37ae7790 r12 0x3000000008 r13 0xffff800020b555a0 r14 0x104 r15 0x1 rip 0xffffffff81f247d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b55580 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=261399 stat=onproc flags process=0 proc=4000000 pri=71, usrpri=71, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0290,0xffff800020ab0ef8 process=0xffff800020adc700 user=0xffff800020b50000, vmspace=0xfffffd807f00c5c0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10139 361198 89468 0 2 0 syz-executor.1 10139 376410 89468 0 7 0x4000000 syz-executor.1 94384 344909 45509 0 2 0 syz-executor.0 *94384 261399 45509 0 7 0x4000000 syz-executor.0 45509 291558 78440 0 3 0x82 nanosleep syz-executor.0 89468 8150 78440 0 3 0x82 nanosleep syz-executor.1 644 248378 0 0 3 0x14200 acct acct 78522 117844 0 0 3 0x14200 bored sosplice 78440 445329 95111 0 3 0x82 thrsleep syz-fuzzer 78440 145657 95111 0 3 0x4000082 nanosleep syz-fuzzer 78440 413307 95111 0 3 0x4000082 thrsleep syz-fuzzer 78440 195856 95111 0 3 0x4000082 thrsleep syz-fuzzer 78440 474951 95111 0 3 0x4000082 thrsleep syz-fuzzer 78440 235348 95111 0 3 0x4000082 thrsleep syz-fuzzer 78440 201439 95111 0 3 0x4000082 thrsleep syz-fuzzer 78440 99480 95111 0 3 0x4000082 kqread syz-fuzzer 78440 358326 95111 0 3 0x4000082 thrsleep syz-fuzzer 78440 507113 95111 0 3 0x4000082 thrsleep syz-fuzzer 95111 292688 22113 0 3 0x10008a pause ksh 22113 447775 21071 0 3 0x92 select sshd 60571 161566 1 0 3 0x100083 ttyin getty 21071 4340 1 0 3 0x80 select sshd 66888 4955 28465 74 3 0x100092 bpf pflogd 28465 292502 1 0 3 0x80 netio pflogd 41647 511196 5339 73 3 0x100090 kqread syslogd 5339 351468 1 0 3 0x100082 netio syslogd 69702 170319 1 77 3 0x100090 poll dhclient 99051 78609 1 0 3 0x80 poll dhclient 89166 12164 0 0 2 0x14200 zerothread 58758 516979 0 0 3 0x14200 aiodoned aiodoned 83784 237007 0 0 3 0x14200 syncer update 66584 475551 0 0 3 0x14200 cleaner cleaner 76367 353251 0 0 3 0x14200 reaper reaper 66025 96001 0 0 3 0x14200 pgdaemon pagedaemon 63136 11336 0 0 3 0x14200 bored crynlk 25503 199370 0 0 3 0x14200 bored crypto 20042 92062 0 0 3 0x40014200 acpi0 acpi0 61719 310695 0 0 3 0x40014200 idle1 42709 9532 0 0 3 0x14200 bored softnet 17134 446112 0 0 3 0x14200 bored systqmp 4754 522877 0 0 3 0x14200 bored systq 69888 88256 0 0 3 0x40014200 bored softclock 60755 42815 0 0 3 0x40014200 idle0 81455 381394 0 0 3 0x14200 bored smr 1 120715 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 10139 (syz-executor.1) thread 0xffff800020ab0ee8 (376410) shared rwlock vmlistlock r = 0 (0xffff80000066f478) #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 (0xffffffff82620168) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9572 6653K 7364K 78643K 18582 0 0 pcb 13 8K 8K 78643K 397 0 0 rtable 109 4K 4K 78643K 1099 0 0 ifaddr 69 16K 16K 78643K 408 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1638 0 0 iov 0 0K 32K 78643K 279 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1214 76K 77K 78643K 3992 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 36 0 0 VM map 2 1K 1K 78643K 4 0 0 sem 12 1K 1K 78643K 129 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12843 0 0 file desc 6 17K 25K 78643K 3043 0 0 sigio 0 0K 0K 78643K 39 0 0 proc 62 63K 95K 78643K 1014 0 0 subproc 32 2K 2K 78643K 176 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 301 0 0 in_multi 33 2K 2K 78643K 202 0 0 ether_multi 1 0K 0K 78643K 16 0 0 mrt 0 0K 0K 78643K 14 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 78 344K 344K 78643K 78 0 0 exec 0 0K 1K 78643K 540 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 107 22K 26K 78643K 10697 0 0 UVM aobj 108 3K 3K 78643K 109 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 372 0 0 NDP 15 0K 0K 78643K 121 0 0 temp 193 3556K 3632K 78643K 31015 0 0 kqueue 0 0K 0K 78643K 11 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 23 0 17 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 156 0 154 1 0 1 1 0 8 0 rtentry 112 132 0 88 2 0 2 2 0 8 0 unpcb 120 917 0 907 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 2 0 2 2 1 1 1 0 8 1 tcpqe 32 7328 0 7328 3 3 0 2 0 8 0 tcpcb 544 621 0 617 1 0 1 1 0 8 0 inpcb 280 1777 0 1770 2 1 1 2 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 20 0 16 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 57 0 57 10 9 1 1 0 8 1 pffrag 232 2 0 2 2 2 0 1 0 482 0 pffrnode 88 2 0 2 2 2 0 1 0 8 0 pffrent 40 4 0 4 2 2 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 99 0 83 1 0 1 1 0 8 0 pfstkey 112 99 0 83 1 0 1 1 0 8 0 pfstate 328 99 0 83 3 0 3 3 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 256 572 0 354 14 0 14 14 0 8 0 art_table 32 573 0 354 2 0 2 2 0 8 0 art_node 16 127 0 87 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 125 0 115 1 0 1 1 0 8 0 shmpl 112 107 0 1 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 6072 0 4671 46 0 46 46 0 8 0 ffsino 272 6072 0 4671 95 1 94 95 0 8 0 nchpl 144 10484 0 8882 61 0 61 61 0 8 0 uvmvnodes 72 6009 0 0 110 0 110 110 0 8 0 vnodes 208 6009 0 0 317 0 317 317 0 8 0 namei 1024 33313 0 33313 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 2 0 2 1 1 0 1 0 8 0 scsiplug 64 6 0 6 5 5 0 1 0 8 0 scxspl 192 30833 0 30833 21 20 1 7 0 8 1 plimitpl 152 264 0 256 1 0 1 1 0 8 0 sigapl 432 3219 0 3203 3 1 2 3 0 8 0 futexpl 56 39268 0 39268 1 0 1 1 0 8 1 knotepl 112 704 0 685 1 0 1 1 0 8 0 kqueuepl 104 642 0 640 1 0 1 1 0 8 0 pipepl 112 1690 0 1669 2 1 1 2 0 8 0 fdescpl 488 3220 0 3203 3 0 3 3 0 8 0 filepl 152 18853 0 18746 8 3 5 6 0 8 0 lockfpl 104 1083 0 1082 1 0 1 1 0 8 0 lockfspl 48 357 0 356 1 0 1 1 0 8 0 sessionpl 112 26 0 15 1 0 1 1 0 8 0 pgrppl 48 63 0 52 1 0 1 1 0 8 0 ucredpl 96 3271 0 3262 1 0 1 1 0 8 0 zombiepl 144 3203 0 3203 3 2 1 1 0 8 1 processpl 896 3237 0 3203 4 0 4 4 0 8 0 procpl 632 9530 0 9485 10 5 5 5 0 8 1 srpgc 64 18 0 18 8 8 0 1 0 8 0 sosppl 128 29 0 29 12 11 1 1 0 8 1 sockpl 384 2884 0 2865 6 3 3 4 0 8 1 mcl64k 65536 269 0 0 34 10 24 34 0 8 1 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 235 0 0 29 8 21 29 0 8 0 mtagpl 80 35 0 0 1 0 1 1 0 8 0 mbufpl 256 471 0 0 23 0 23 23 0 8 0 bufpl 256 16704 0 9656 441 0 441 441 0 8 0 anonpl 16 308180 0 295581 140 72 68 70 0 124 13 amapchunkpl 152 18684 0 18579 27 17 10 10 0 158 5 amappl16 192 16049 0 15333 135 91 44 49 0 8 8 amappl15 184 102 0 102 2 2 0 1 0 8 0 amappl14 176 1111 0 1105 1 0 1 1 0 8 0 amappl13 168 431 0 431 1 1 0 1 0 8 0 amappl12 160 205 0 203 2 1 1 1 0 8 0 amappl11 152 587 0 572 1 0 1 1 0 8 0 amappl10 144 20 0 17 1 0 1 1 0 8 0 amappl9 136 1406 0 1397 1 0 1 1 0 8 0 amappl8 128 967 0 936 2 0 2 2 0 8 0 amappl7 120 76 0 70 1 0 1 1 0 8 0 amappl6 112 590 0 578 1 0 1 1 0 8 0 amappl5 104 422 0 407 1 0 1 1 0 8 0 amappl4 96 3207 0 3176 1 0 1 1 0 8 0 amappl3 88 1113 0 1107 1 0 1 1 0 8 0 amappl2 80 24863 0 24782 3 1 2 3 0 8 0 amappl1 72 78548 0 78096 27 16 11 20 0 8 0 amappl 80 9904 0 9867 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 64 108 0 1 2 0 2 2 0 8 0 uaddrrnd 24 3222 0 3203 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3222 0 3203 1 0 1 1 0 8 0 vmmpekpl 168 26124 0 26084 2 0 2 2 0 8 0 vmmpepl 168 395038 0 393085 231 136 95 111 0 357 8 vmsppl 368 3219 0 3203 2 0 2 2 0 8 0 pdppl 4096 6451 0 6410 7 1 6 6 0 8 0 pvpl 32 849123 0 833271 284 119 165 170 0 265 36 pmappl 232 3221 0 3205 3 2 1 2 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 661 0 25 19 0 19 19 0 8 0