login: panic: panic: kernel 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 * 7509 61987 0 0 0 1 syz-executor.0 386843 76027 0 0 0x4000000 0 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 __assert(ffffffff822024c6,ffffffff821f12d9,2b2,ffffffff821d28fc) at __assert+0x2e 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 = 18446744073709549216 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(ffffffff822024c6,ffffffff821f12d9,2b2,ffffffff821d28fc) at __assert+0x2e 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 0xffff8000221a1580 rbx 0xffff8000221a1630 rdx 0xffff800020abec70 rcx 0 rax 0 r8 0xffffffff81048ff3 kprintf+0x173 r9 0x1 r10 0x25 r11 0xec76c151ac0b68d r12 0x3000000008 r13 0xffff8000221a1590 r14 0x104 r15 0x1 rip 0xffffffff81ae7518 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000221a1570 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=7509 stat=onproc flags process=0 proc=0 pri=66, usrpri=66, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe780,0xffffffff8262aaa8 process=0xffff800020a8a390 user=0xffff80002219c000, vmspace=0xfffffd807f00c000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *61987 7509 87302 0 7 0 syz-executor.0 76027 104544 94021 0 2 0 syz-executor.1 76027 520748 94021 0 3 0x4000080 fsleep syz-executor.1 76027 386843 94021 0 7 0x4000000 syz-executor.1 94021 472424 50066 0 3 0x82 nanosleep syz-executor.1 78188 329330 1 0 3 0x100083 ttyin getty 87302 368931 50066 0 2 0x2 syz-executor.0 13133 306525 0 0 3 0x14200 acct acct 50892 355073 0 0 3 0x14200 bored sosplice 50066 392158 50109 0 3 0x82 thrsleep syz-fuzzer 50066 84801 50109 0 3 0x4000082 nanosleep syz-fuzzer 50066 374820 50109 0 3 0x4000082 thrsleep syz-fuzzer 50066 339583 50109 0 3 0x4000082 thrsleep syz-fuzzer 50066 217030 50109 0 3 0x4000082 thrsleep syz-fuzzer 50066 59683 50109 0 2 0x4000082 syz-fuzzer 50066 284900 50109 0 3 0x4000082 thrsleep syz-fuzzer 50066 257306 50109 0 3 0x4000082 thrsleep syz-fuzzer 50066 85585 50109 0 3 0x4000082 nanosleep syz-fuzzer 50066 43031 50109 0 3 0x4000082 thrsleep syz-fuzzer 50109 386427 46434 0 3 0x10008a pause ksh 46434 228986 84728 0 3 0x92 select sshd 84728 514173 1 0 3 0x80 select sshd 93703 435427 37859 74 3 0x100092 bpf pflogd 37859 397275 1 0 3 0x80 netio pflogd 91080 234193 38170 73 3 0x100090 kqread syslogd 38170 291282 1 0 3 0x100082 netio syslogd 13616 167375 1 77 3 0x100090 poll dhclient 10102 164553 1 0 3 0x80 poll dhclient 24768 7220 0 0 2 0x14200 zerothread 45668 396712 0 0 3 0x14200 aiodoned aiodoned 13540 440322 0 0 3 0x14200 syncer update 88075 140089 0 0 3 0x14200 cleaner cleaner 80501 132178 0 0 3 0x14200 reaper reaper 26152 30604 0 0 3 0x14200 pgdaemon pagedaemon 9095 312907 0 0 3 0x14200 bored crynlk 84229 409835 0 0 3 0x14200 bored crypto 12008 401940 0 0 3 0x40014200 acpi0 acpi0 79178 82051 0 0 3 0x40014200 idle1 44952 69230 0 0 3 0x14200 bored softnet 13076 54656 0 0 3 0x14200 bored systqmp 40829 170708 0 0 3 0x14200 bored systq 1868 107082 0 0 3 0x40014200 bored softclock 94108 177002 0 0 3 0x40014200 idle0 15720 416923 0 0 3 0x14200 bored smr 1 76197 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 76027 (syz-executor.1) thread 0xffff800020abe780 (386843) 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:290 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:524 #4 sys_ioctl+0x5b8 #5 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8262c5a8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x412 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x412 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 Process 87302 (syz-executor.0) thread 0xffff800020ace2b0 (368931) exclusive rrwlock inode r = 0 (0xfffffd8066c3e2c8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xce sys/kern/vfs_vops.c:449 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #9 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e113d60) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:561 #5 vfs_lookup+0xec sys/kern/vfs_lookup.c:418 #6 namei+0x61c sys/kern/vfs_lookup.c:248 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x552 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9624 6720K 7616K 78643K 21666 0 0 pcb 13 8K 8K 78643K 472 0 0 rtable 114 12K 12K 78643K 1411 0 0 ifaddr 85 19K 22K 78643K 540 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1679 0 0 iov 0 0K 32K 78643K 389 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1214 76K 77K 78643K 5122 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 54 0 0 VM map 2 1K 1K 78643K 17 0 0 sem 12 0K 0K 78643K 482 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 4239 0 0 sigio 1 0K 0K 78643K 72 0 0 proc 54 51K 83K 78643K 1237 0 0 subproc 32 2K 2K 78643K 221 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 328 0 0 in_multi 33 2K 2K 78643K 271 0 0 ether_multi 1 0K 0K 78643K 16 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 114 503K 503K 78643K 114 0 0 exec 0 0K 1K 78643K 645 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 109 22K 31K 78643K 14461 0 0 UVM aobj 130 5K 5K 78643K 153 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 453 0 0 NDP 20 0K 0K 78643K 158 0 0 temp 229 3557K 4196K 78643K 64532 0 0 kqueue 0 0K 0K 78643K 33 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 29 0 22 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 189 0 187 1 0 1 1 0 8 0 rtentry 112 172 0 127 2 0 2 2 0 8 0 unpcb 120 1368 0 1358 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 8353 0 8353 1 1 0 1 0 8 0 tcpcb 544 804 0 800 1 0 1 1 0 8 0 inpcb 280 2296 0 2287 7 5 2 2 0 8 1 rttmr 72 3 0 3 2 2 0 1 0 8 0 nd6 48 39 0 33 1 0 1 1 0 8 0 pkpcb 40 20 0 20 8 8 0 1 0 8 0 ppxss 1128 84 0 84 10 9 1 1 0 8 1 pffrag 232 5 0 5 2 2 0 1 0 482 0 pffrnode 88 5 0 5 2 2 0 1 0 8 0 pffrent 40 12 0 12 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 24 118 0 93 1 0 1 1 0 8 0 pfstkey 112 118 0 93 1 0 1 1 0 8 0 pfstate 328 118 0 93 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 256 716 0 521 14 1 13 14 0 8 0 art_table 32 717 0 521 2 0 2 2 0 8 0 art_node 16 169 0 128 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 29 2 1 1 1 0 8 0 semapl 112 478 0 468 1 0 1 1 0 8 0 shmpl 112 151 0 23 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 8003 0 6570 47 0 47 47 0 8 0 ffsino 272 8003 0 6570 96 0 96 96 0 8 0 nchpl 144 14061 0 12422 62 0 62 62 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 45828 0 45828 5 4 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 15 0 15 6 6 0 1 0 8 0 scsiplug 64 14 0 14 9 9 0 1 0 8 0 scxspl 192 40618 0 40611 28 27 1 7 0 8 0 plimitpl 152 454 0 446 1 0 1 1 0 8 0 sigapl 432 4410 0 4394 3 1 2 3 0 8 0 futexpl 56 54196 0 54195 4 3 1 1 0 8 0 knotepl 112 918 0 899 1 0 1 1 0 8 0 kqueuepl 104 825 0 823 1 0 1 1 0 8 0 pipepl 112 2336 0 2317 5 4 1 2 0 8 0 fdescpl 488 4411 0 4394 3 0 3 3 0 8 0 filepl 152 26164 0 26063 12 7 5 7 0 8 1 lockfpl 104 1504 0 1504 4 3 1 1 0 8 1 lockfspl 48 500 0 500 4 3 1 1 0 8 1 sessionpl 112 33 0 22 1 0 1 1 0 8 0 pgrppl 48 65 0 54 1 0 1 1 0 8 0 ucredpl 96 5177 0 5168 1 0 1 1 0 8 0 zombiepl 144 4394 0 4394 2 1 1 1 0 8 1 processpl 896 4428 0 4394 4 0 4 4 0 8 0 procpl 632 13083 0 13038 8 3 5 5 0 8 0 srpgc 64 25 0 25 11 11 0 1 0 8 0 sosppl 128 53 0 53 11 10 1 1 0 8 1 sockpl 384 3916 0 3897 9 6 3 4 0 8 1 mcl64k 65536 261 0 0 33 11 22 33 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 16 0 0 2 0 2 2 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 20 0 0 3 1 2 3 0 8 0 mcl2k2 2112 16 0 0 2 0 2 2 0 8 0 mcl2k 2048 188 0 0 20 5 15 20 0 8 0 mtagpl 80 48 0 0 1 0 1 1 0 8 0 mbufpl 256 471 0 0 21 1 20 20 0 8 0 bufpl 256 14604 0 7585 439 0 439 439 0 8 0 anonpl 16 394161 0 383322 161 98 63 70 0 124 7 amapchunkpl 152 25867 0 25756 41 34 7 19 0 158 0 amappl16 192 21253 0 20536 123 74 49 49 0 8 12 amappl15 184 367 0 367 1 1 0 1 0 8 0 amappl14 176 1006 0 999 1 0 1 1 0 8 0 amappl13 168 792 0 792 3 3 0 1 0 8 0 amappl12 160 447 0 444 2 1 1 1 0 8 0 amappl11 152 289 0 274 1 0 1 1 0 8 0 amappl10 144 359 0 352 1 0 1 1 0 8 0 amappl9 136 1735 0 1730 1 0 1 1 0 8 0 amappl8 128 1275 0 1244 3 1 2 2 0 8 0 amappl7 120 328 0 320 1 0 1 1 0 8 0 amappl6 112 277 0 268 1 0 1 1 0 8 0 amappl5 104 658 0 643 1 0 1 1 0 8 0 amappl4 96 4440 0 4411 2 1 1 2 0 8 0 amappl3 88 1487 0 1476 1 0 1 1 0 8 0 amappl2 80 33900 0 33827 3 1 2 3 0 8 0 amappl1 72 102893 0 102451 26 16 10 20 0 8 0 amappl 80 13540 0 13501 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 64 152 0 23 3 0 3 3 0 8 0 uaddrrnd 24 4426 0 4394 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4426 0 4394 1 0 1 1 0 8 0 vmmpekpl 168 34975 0 34938 2 0 2 2 0 8 0 vmmpepl 168 534954 0 533025 278 172 106 107 0 357 20 vmsppl 368 4410 0 4394 2 0 2 2 0 8 0 pdppl 4096 8859 0 8818 7 1 6 6 0 8 0 pvpl 32 1091710 0 1077647 346 185 161 169 0 265 24 pmappl 232 4425 0 4409 4 3 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 652 0 27 20 1 19 19 0 8 0