`‹#'?µY`‹#'?µY`‹#'?µYpanic: malloc: allocatpanic: 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 *464308 15210 0 0 0 1 syz-executor.1 20864 38171 0 0 0x4000000 0 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(ffffffff82201a2f,ffffffff821ee306,2b2,ffffffff821d0079) 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 = 18446744073709548896 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(ffffffff82201a2f,ffffffff821ee306,2b2,ffffffff821d0079) 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 0xffff8000239a5700 rbx 0xffff8000239a57b0 rdx 0xffff800020ab1160 rcx 0 rax 0 r8 0xffffffff8187164f kprintf+0x16f r9 0x1 r10 0x25 r11 0x81a9f596cfc1e5d5 r12 0x3000000008 r13 0xffff8000239a5710 r14 0x104 r15 0x1 rip 0xffffffff818fc578 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000239a56f0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=464308 stat=onproc flags process=0 proc=0 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0780,0xffffffff8266bed8 process=0xffff800020addc00 user=0xffff8000239a0000, vmspace=0xfffffd807f00ba10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *15210 464308 9388 0 7 0 syz-executor.1 38171 407225 31007 0 3 0x80 fsleep syz-executor.0 38171 20864 31007 0 7 0x4000000 syz-executor.0 38171 345454 31007 0 3 0x4000080 fsleep syz-executor.0 9388 185102 24836 0 2 0x2 syz-executor.1 82082 352901 1 0 3 0x100083 ttyin getty 31007 165480 24836 0 3 0x82 nanosleep syz-executor.0 15081 295049 0 0 3 0x14200 acct acct 58178 49081 0 0 3 0x14200 bored sosplice 24836 155328 679 0 3 0x82 thrsleep syz-fuzzer 24836 160624 679 0 3 0x4000082 nanosleep syz-fuzzer 24836 520867 679 0 3 0x4000082 thrsleep syz-fuzzer 24836 15278 679 0 2 0x4000082 syz-fuzzer 24836 176027 679 0 3 0x4000082 thrsleep syz-fuzzer 24836 393648 679 0 3 0x4000082 thrsleep syz-fuzzer 24836 199283 679 0 3 0x4000082 thrsleep syz-fuzzer 24836 183595 679 0 3 0x4000082 thrsleep syz-fuzzer 24836 101817 679 0 3 0x4000082 thrsleep syz-fuzzer 24836 363186 679 0 3 0x4000082 thrsleep syz-fuzzer 679 32662 81280 0 3 0x10008a pause ksh 81280 282219 82119 0 3 0x92 select sshd 82119 116579 1 0 3 0x80 select sshd 74921 83958 82467 74 3 0x100092 bpf pflogd 82467 392599 1 0 3 0x80 netio pflogd 8787 295682 28676 73 3 0x100090 kqread syslogd 28676 234580 1 0 3 0x100082 netio syslogd 87865 53157 1 77 3 0x100090 poll dhclient 32016 323169 1 0 3 0x80 poll dhclient 85899 411947 0 0 3 0x14200 pgzero zerothread 3004 211307 0 0 3 0x14200 aiodoned aiodoned 29821 366595 0 0 3 0x14200 syncer update 42295 484024 0 0 3 0x14200 cleaner cleaner 1937 12502 0 0 3 0x14200 reaper reaper 74608 251506 0 0 3 0x14200 pgdaemon pagedaemon 69711 151544 0 0 3 0x14200 bored crynlk 88619 79339 0 0 3 0x14200 bored crypto 12438 257236 0 0 3 0x40014200 acpi0 acpi0 14429 206497 0 0 3 0x40014200 idle1 31320 111579 0 0 3 0x14200 bored softnet 79967 442125 0 0 3 0x14200 bored systqmp 84050 15396 0 0 3 0x14200 bored systq 62329 354731 0 0 3 0x40014200 bored softclock 85133 351477 0 0 3 0x40014200 idle0 40097 423638 0 0 3 0x14200 bored smr 1 190970 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 38171 (syz-executor.0) thread 0xffff800020ab0508 (20864) 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 (0xffffffff82630048) #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 Process 9388 (syz-executor.1) thread 0xffff800020acf3e8 (185102) exclusive rrwlock inode r = 0 (0xfffffd806e164810) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 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+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8077a79a28) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:562 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:418 #6 namei+0x62c sys/kern/vfs_lookup.c:248 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 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 9619 6485K 7308K 78643K 22734 0 0 pcb 13 8K 8K 78643K 710 0 0 rtable 115 4K 5K 78643K 1872 0 0 ifaddr 89 19K 21K 78643K 680 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1764 0 0 iov 0 0K 32K 78643K 1231 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1201 75K 76K 78643K 5845 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 98 0 0 VM map 2 1K 1K 78643K 19 0 0 sem 12 0K 0K 78643K 1346 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12843 0 0 file desc 6 17K 25K 78643K 5444 0 0 sigio 0 0K 0K 78643K 69 0 0 proc 62 63K 83K 78643K 1511 0 0 subproc 32 2K 2K 78643K 327 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 528 0 0 in_multi 33 2K 2K 78643K 349 0 0 ether_multi 1 0K 0K 78643K 21 0 0 mrt 0 0K 0K 78643K 22 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 916 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 132 23K 32K 78643K 19409 0 0 UVM aobj 130 9K 9K 78643K 151 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 734 0 0 NDP 22 0K 0K 78643K 207 0 0 temp 242 3561K 4200K 78643K 65232 0 0 kqueue 0 0K 0K 78643K 23 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 42 0 36 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 677 0 675 1 0 1 1 0 8 0 rtentry 112 227 0 183 2 0 2 2 0 8 0 unpcb 120 20032 0 20018 17 15 2 2 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 5951 0 5951 1 1 0 1 0 8 0 tcpcb 544 1240 0 1236 3 2 1 3 0 8 0 inpcb 280 3704 0 3695 11 10 1 3 0 8 0 rttmr 72 6 0 6 5 5 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 nd6 48 36 0 32 1 0 1 1 0 8 0 pkpcb 40 26 0 26 7 7 0 1 0 8 0 ppxss 1128 107 0 107 11 10 1 1 0 8 1 pffrag 232 3 0 3 2 2 0 1 0 482 0 pffrnode 88 3 0 3 2 2 0 1 0 8 0 pffrent 40 8 0 8 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 24 133 0 106 1 0 1 1 0 8 0 pfstkey 112 134 0 107 2 0 2 2 0 8 0 pfstate 328 134 0 107 4 1 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 256 984 0 765 21 7 14 15 0 8 0 art_table 32 985 0 765 2 0 2 2 0 8 0 art_node 16 216 0 176 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1344 0 1334 1 0 1 1 0 8 0 shmpl 112 149 0 21 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 10103 0 8707 46 0 46 46 0 8 0 ffsino 272 10103 0 8707 94 0 94 94 0 8 0 nchpl 144 18504 0 16875 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 60018 0 60018 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 17 0 17 8 8 0 1 0 8 0 scsiplug 64 7 0 7 5 5 0 1 0 8 0 scxspl 192 50492 0 50492 21 20 1 7 0 8 1 plimitpl 152 495 0 487 1 0 1 1 0 8 0 sigapl 432 5595 0 5579 3 1 2 3 0 8 0 futexpl 56 102539 0 102537 1 0 1 1 0 8 0 knotepl 112 1181 0 1162 5 4 1 2 0 8 0 kqueuepl 104 1110 0 1108 1 0 1 1 0 8 0 pipepl 112 2736 0 2717 7 5 2 2 0 8 1 fdescpl 488 5596 0 5579 3 0 3 3 0 8 0 filepl 152 55090 0 54984 24 18 6 7 0 8 1 lockfpl 104 1799 0 1798 1 0 1 1 0 8 0 lockfspl 48 574 0 573 1 0 1 1 0 8 0 sessionpl 112 37 0 26 1 0 1 1 0 8 0 pgrppl 48 93 0 82 1 0 1 1 0 8 0 ucredpl 96 5535 0 5526 1 0 1 1 0 8 0 zombiepl 144 5581 0 5581 2 1 1 1 0 8 1 processpl 896 5615 0 5581 4 0 4 4 0 8 0 procpl 632 17784 0 17739 6 1 5 5 0 8 0 srpgc 64 34 0 34 15 15 0 1 0 8 0 sosppl 128 86 0 86 16 15 1 1 0 8 1 sockpl 384 24501 0 24476 36 30 6 8 0 8 3 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 16 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 28 0 0 3 0 3 3 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 151 0 0 17 1 16 17 0 8 0 mtagpl 80 55 0 0 1 0 1 1 0 8 0 mbufpl 256 556 0 0 31 1 30 30 0 8 0 bufpl 256 16209 0 9161 441 0 441 441 0 8 0 anonpl 16 512660 0 498265 155 82 73 73 0 124 12 amapchunkpl 152 34912 0 34801 44 38 6 12 0 158 1 amappl16 192 25991 0 25190 147 99 48 52 0 8 7 amappl15 184 913 0 912 3 2 1 1 0 8 0 amappl14 176 964 0 963 1 0 1 1 0 8 0 amappl13 168 703 0 703 3 3 0 1 0 8 0 amappl12 160 27 0 26 1 0 1 1 0 8 0 amappl11 152 664 0 645 1 0 1 1 0 8 0 amappl10 144 1400 0 1395 1 0 1 1 0 8 0 amappl9 136 1875 0 1869 1 0 1 1 0 8 0 amappl8 128 1451 0 1410 2 0 2 2 0 8 0 amappl7 120 1507 0 1497 1 0 1 1 0 8 0 amappl6 112 630 0 615 1 0 1 1 0 8 0 amappl5 104 307 0 293 1 0 1 1 0 8 0 amappl4 96 6163 0 6128 1 0 1 1 0 8 0 amappl3 88 503 0 497 1 0 1 1 0 8 0 amappl2 80 43874 0 43800 3 1 2 3 0 8 0 amappl1 72 132114 0 131673 26 15 11 20 0 8 0 amappl 80 18288 0 18248 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 64 150 0 21 3 0 3 3 0 8 0 uaddrrnd 24 5613 0 5579 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5613 0 5579 1 0 1 1 0 8 0 vmmpekpl 168 43298 0 43259 2 0 2 2 0 8 0 vmmpepl 168 687341 0 685310 299 192 107 127 0 357 14 vmsppl 368 5595 0 5579 2 0 2 2 0 8 0 pdppl 4096 11233 0 11192 7 1 6 6 0 8 0 pvpl 32 1389728 0 1372079 337 161 176 182 0 265 33 pmappl 232 5612 0 5596 9 8 1 2 0 8 0 extentpl 40 38 0 22 1 0 1 1 0 8 0 phpool 112 638 0 16 18 0 18 18 0 8 0