ppanic: 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 *381394 3599 0 0 0 1 syz-executor.1 103679 45440 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(ffffffff8220100d,ffffffff821ee1f1,2b2,ffffffff821d25b5) 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 = 18446744073709550656 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(ffffffff8220100d,ffffffff821ee1f1,2b2,ffffffff821d25b5) 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 0xffff800021b7d5a0 rbx 0xffff800021b7d650 rdx 0xffff800020ab1b40 rcx 0 rax 0 r8 0xffffffff8136a8df kprintf+0x16f r9 0x1 r10 0x25 r11 0xce0184eb670ed97b r12 0x3000000008 r13 0xffff800021b7d5b0 r14 0x104 r15 0x1 rip 0xffffffff8159f288 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b7d590 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=381394 stat=onproc flags process=0 proc=0 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0290,0xffffffff8265f578 process=0xffff800020add880 user=0xffff800021b78000, vmspace=0xfffffd807f00cb80 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 3599 381394 92966 0 7 0 syz-executor.1 45440 367210 8480 0 2 0 syz-executor.0 45440 423955 8480 0 3 0x4000080 fsleep syz-executor.0 45440 103679 8480 0 7 0x4000000 syz-executor.0 49261 334753 1 0 3 0x100083 ttyin getty 92966 371662 43052 0 2 0x2 syz-executor.1 8480 49889 43052 0 3 0x82 nanosleep syz-executor.0 74109 8258 0 0 3 0x14200 bored sosplice 43052 504265 11757 0 3 0x82 thrsleep syz-fuzzer 43052 245101 11757 0 3 0x4000082 nanosleep syz-fuzzer 43052 387122 11757 0 3 0x4000082 thrsleep syz-fuzzer 43052 305013 11757 0 3 0x4000082 nanosleep syz-fuzzer 43052 507609 11757 0 3 0x4000082 thrsleep syz-fuzzer 43052 113870 11757 0 3 0x4000082 thrsleep syz-fuzzer 43052 287719 11757 0 3 0x4000082 thrsleep syz-fuzzer 43052 52321 11757 0 3 0x4000082 thrsleep syz-fuzzer 43052 130883 11757 0 2 0x4000082 syz-fuzzer 43052 64204 11757 0 3 0x4000082 thrsleep syz-fuzzer 11757 39664 68271 0 3 0x10008a pause ksh 68271 199722 72845 0 3 0x92 select sshd 72845 208159 1 0 3 0x80 select sshd 83845 70582 21397 74 3 0x100092 bpf pflogd 21397 71513 1 0 3 0x80 netio pflogd 40942 269821 68090 73 3 0x100090 kqread syslogd 68090 424436 1 0 3 0x100082 netio syslogd 90886 248998 1 77 3 0x100090 poll dhclient 46343 437430 1 0 3 0x80 poll dhclient 3381 480060 0 0 2 0x14200 zerothread 41138 307323 0 0 3 0x14200 aiodoned aiodoned 83703 152965 0 0 3 0x14200 syncer update 26709 482380 0 0 3 0x14200 cleaner cleaner 33354 276447 0 0 3 0x14200 reaper reaper 56896 65956 0 0 3 0x14200 pgdaemon pagedaemon 18816 216259 0 0 3 0x14200 bored crynlk 86150 34623 0 0 3 0x14200 bored crypto 5196 103073 0 0 3 0x40014200 acpi0 acpi0 19840 216924 0 0 3 0x40014200 idle1 91059 113270 0 0 3 0x14200 bored softnet 23061 6572 0 0 3 0x14200 bored systqmp 23049 395866 0 0 3 0x14200 bored systq 67239 296356 0 0 3 0x40014200 bored softclock 16675 76988 0 0 3 0x40014200 idle0 66934 70689 0 0 3 0x14200 bored smr 1 487326 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 45440 (syz-executor.0) thread 0xffff800020ab0290 (103679) 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: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 (0xffffffff8264ee38) #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 92966 (syz-executor.1) thread 0xffff800020ab09f8 (371662) exclusive rrwlock inode r = 0 (0xfffffd806ac7e5e8) #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 (0xfffffd806d8693d8) #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 9605 6709K 8909K 78643K 23542 0 0 pcb 13 8K 8K 78643K 301 0 0 rtable 113 4K 4K 78643K 1028 0 0 ifaddr 81 17K 18K 78643K 368 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1552 0 0 iov 0 0K 32K 78643K 279 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1246 78K 78K 78643K 5152 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 32 0 0 VM map 2 1K 1K 78643K 8 0 0 sem 12 0K 1K 78643K 420 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 2599 0 0 sigio 0 0K 0K 78643K 17 0 0 proc 62 63K 83K 78643K 1110 0 0 subproc 32 2K 2K 78643K 189 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 290 0 0 in_multi 33 2K 2K 78643K 239 0 0 ether_multi 1 0K 0K 78643K 24 0 0 mrt 0 0K 0K 78643K 8 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 498 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 103 21K 30K 78643K 10339 0 0 UVM aobj 126 4K 4K 78643K 141 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 300 0 0 NDP 19 0K 0K 78643K 113 0 0 temp 221 3556K 3645K 78643K 38653 0 0 kqueue 0 0K 0K 78643K 6 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 26 0 19 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 177 0 175 1 0 1 1 0 8 0 rtentry 112 139 0 94 2 0 2 2 0 8 0 unpcb 120 1038 0 1024 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 5386 0 5386 2 2 0 2 0 8 0 tcpcb 544 626 0 622 3 2 1 3 0 8 0 inpcb 280 1719 0 1711 4 3 1 3 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 22 0 18 1 0 1 1 0 8 0 pkpcb 40 10 0 10 4 4 0 1 0 8 0 ppxss 1128 50 0 50 7 7 0 1 0 8 0 pffrag 232 4 0 4 2 2 0 1 0 482 0 pffrnode 88 4 0 4 2 2 0 1 0 8 0 pffrent 40 13 0 13 3 3 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 78 0 52 1 0 1 1 0 8 0 pfstkey 112 78 0 52 1 0 1 1 0 8 0 pfstate 328 78 0 52 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 256 620 0 404 19 5 14 14 0 8 0 art_table 32 621 0 404 2 0 2 2 0 8 0 art_node 16 138 0 97 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 402 0 392 1 0 1 1 0 8 0 shmpl 112 139 0 15 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 5332 0 3929 46 0 46 46 0 8 0 ffsino 272 5332 0 3929 94 0 94 94 0 8 0 nchpl 144 9162 0 7542 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 38768 0 38768 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 6 0 6 3 3 0 1 0 8 0 scsiplug 64 6 0 6 4 4 0 1 0 8 0 scxspl 192 25739 0 25712 17 15 2 6 0 8 0 plimitpl 152 272 0 263 1 0 1 1 0 8 0 sigapl 432 2777 0 2761 3 1 2 3 0 8 0 futexpl 56 76825 0 76824 1 0 1 1 0 8 0 knotepl 112 665 0 646 4 3 1 2 0 8 0 kqueuepl 104 602 0 600 1 0 1 1 0 8 0 pipepl 112 1464 0 1445 7 5 2 2 0 8 1 fdescpl 488 2778 0 2761 3 0 3 3 0 8 0 filepl 152 25901 0 25797 17 10 7 7 0 8 2 lockfpl 104 6552 0 6550 1 0 1 1 0 8 0 lockfspl 48 2775 0 2773 1 0 1 1 0 8 0 sessionpl 112 32 0 21 1 0 1 1 0 8 0 pgrppl 48 54 0 43 1 0 1 1 0 8 0 ucredpl 96 3308 0 3299 1 0 1 1 0 8 0 zombiepl 144 2762 0 2762 2 1 1 1 0 8 1 processpl 896 2795 0 2762 4 0 4 4 0 8 0 procpl 632 9100 0 9056 5 0 5 5 0 8 1 srpgc 64 18 0 18 5 5 0 1 0 8 0 sosppl 128 22 0 22 6 6 0 1 0 8 0 sockpl 384 2981 0 2958 14 10 4 5 0 8 1 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 15 0 0 2 0 2 2 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 278 0 0 34 2 32 34 0 8 1 mtagpl 80 43 0 0 1 0 1 1 0 8 0 mbufpl 256 331 0 0 19 0 19 19 0 8 0 bufpl 256 10980 0 3932 441 0 441 441 0 8 0 anonpl 16 285974 0 271896 131 68 63 75 0 124 0 amapchunkpl 152 18404 0 18292 28 22 6 10 0 158 0 amappl16 192 13958 0 13151 122 81 41 53 0 8 0 amappl15 184 9 0 9 2 2 0 1 0 8 0 amappl14 176 266 0 264 1 0 1 1 0 8 0 amappl13 168 126 0 126 4 4 0 1 0 8 0 amappl12 160 461 0 457 1 0 1 1 0 8 0 amappl11 152 822 0 805 1 0 1 1 0 8 0 amappl10 144 587 0 585 1 0 1 1 0 8 0 amappl9 136 1140 0 1133 1 0 1 1 0 8 0 amappl8 128 698 0 667 2 0 2 2 0 8 0 amappl7 120 648 0 641 1 0 1 1 0 8 0 amappl6 112 810 0 798 1 0 1 1 0 8 0 amappl5 104 652 0 636 1 0 1 1 0 8 0 amappl4 96 2576 0 2550 1 0 1 1 0 8 0 amappl3 88 832 0 826 1 0 1 1 0 8 0 amappl2 80 20968 0 20896 3 1 2 3 0 8 0 amappl1 72 71951 0 71505 26 16 10 20 0 8 0 amappl 80 9505 0 9465 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 64 140 0 15 3 0 3 3 0 8 0 uaddrrnd 24 2784 0 2761 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2784 0 2761 1 0 1 1 0 8 0 vmmpekpl 168 26638 0 26603 3 1 2 2 0 8 0 vmmpepl 168 350455 0 348439 211 120 91 114 0 357 2 vmsppl 368 2777 0 2761 2 0 2 2 0 8 0 pdppl 4096 5575 0 5534 7 1 6 6 0 8 0 pvpl 32 783398 0 766089 293 128 165 180 0 265 19 pmappl 232 2783 0 2767 5 4 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 637 0 14 18 0 18 18 0 8 0