panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *333560 15184 0 0x8000000 0x4000000 0 syz-executor.0 238499 5529 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e8745) at panic+0x17b sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82e31640,9,0) at witness_checkorder+0xd03 witness_debugger sys/kern/subr_witness.c:2524 [inline] witness_checkorder(ffffffff82e31640,9,0) at witness_checkorder+0xd03 sys/kern/subr_witness.c:786 __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 intr_handler(ffff80002a4ace10,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d mtx_enter_try(ffffffff82e90320) at mtx_enter_try+0x103 mtx_enter(ffffffff82e90320) at mtx_enter+0x4e sys/kern/kern_lock.c:266 pool_get(ffffffff82e90320,9) at pool_get+0xc4 sys/kern/subr_pool.c:579 uvmspace_alloc(0,1000,1,0) at uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 vm_impl_init(ffff80002a2a00e0,ffff80002a2dacf8) at vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1245 vm_create(ffff800000dfac00,ffff80002a2dacf8) at vm_create+0x13e sys/dev/vmm/vmm.c:388 vmmioctl(a00,c2585601,ffff800000dfac00,1,ffff80002a2dacf8) at vmmioctl+0x2de end trace frame: 0xffff80002a4ad2d0, count: 0 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: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e8745) at panic+0x17b sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82e31640,9,0) at witness_checkorder+0xd03 witness_debugger sys/kern/subr_witness.c:2524 [inline] witness_checkorder(ffffffff82e31640,9,0) at witness_checkorder+0xd03 sys/kern/subr_witness.c:786 __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 intr_handler(ffff80002a4ace10,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d mtx_enter_try(ffffffff82e90320) at mtx_enter_try+0x103 mtx_enter(ffffffff82e90320) at mtx_enter+0x4e sys/kern/kern_lock.c:266 pool_get(ffffffff82e90320,9) at pool_get+0xc4 sys/kern/subr_pool.c:579 uvmspace_alloc(0,1000,1,0) at uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 vm_impl_init(ffff80002a2a00e0,ffff80002a2dacf8) at vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1245 vm_create(ffff800000dfac00,ffff80002a2dacf8) at vm_create+0x13e sys/dev/vmm/vmm.c:388 vmmioctl(a00,c2585601,ffff800000dfac00,1,ffff80002a2dacf8) at vmmioctl+0x2de VOP_IOCTL(fffffd806e8f4d88,c2585601,ffff800000dfac00,1,fffffd807f7d3820,ffff80002a2dacf8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806a393390,c2585601,ffff800000dfac00,ffff80002a2dacf8) at vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a2dacf8,ffff80002a4ad5d0,ffff80002a4ad520) at sys_ioctl+0x4a9 syscall(ffff80002a4ad5d0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a4ad5d0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2a52a009da0, count: -19 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a4acc00 rbx 0xffffffff82cf7d77 cpu_info_full_primary+0x2d77 rdx 0x3fd rcx 0 rax 0x68 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1fa7e82c56c5f89d r11 0xbb784455d53bcb73 r12 0xffffffff82cf7b78 cpu_info_full_primary+0x2b78 r13 0 r14 0 r15 0x1 rip 0xffffffff827f493c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002a4acbf0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) tid=333560 pid=15184 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=32, usrpri=66, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a2dbc58,0xffff80002a2da038 process=0xffff80002a2a7558 user=0xffff80002a4a8000, vmspace=0xfffffd80682936e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 92114 122098 50908 0 2 0x8000000 syz-executor.5 92114 403793 50908 0 2 0xc000000 syz-executor.5 15184 383428 58898 0 2 0x8000000 syz-executor.0 *15184 333560 58898 0 7 0xc000000 syz-executor.0 2767 22786 46044 0 3 0x8000082 nanoslp syz-executor.4 50908 423896 46044 0 3 0x8000082 nanoslp syz-executor.5 2046 59095 46044 0 3 0x8000082 nanoslp syz-executor.7 85862 339630 46044 0 3 0x8000082 nanoslp syz-executor.6 49310 148549 46044 0 3 0x8000082 nanoslp syz-executor.3 59703 170593 46044 0 3 0x8000082 nanoslp syz-executor.2 58898 125815 46044 0 3 0x8000082 nanoslp syz-executor.0 14750 517043 46044 0 3 0x8000002 biowait syz-executor.1 46044 289159 93579 0 3 0x1a000082 thrsleep syz-execprog 46044 490177 93579 0 3 0x1e000082 nanoslp syz-execprog 46044 153146 93579 0 3 0x1e000082 wait syz-execprog 46044 154480 93579 0 3 0x1e000082 wait syz-execprog 46044 249431 93579 0 3 0x1e000082 wait syz-execprog 46044 146727 93579 0 3 0x1e000082 wait syz-execprog 46044 339860 93579 0 3 0x1e000082 thrsleep syz-execprog 46044 336071 93579 0 3 0x1e000082 wait syz-execprog 46044 17689 93579 0 3 0x1e000082 wait syz-execprog 46044 110545 93579 0 3 0x1e000082 wait syz-execprog 46044 248566 93579 0 3 0x1e000082 thrsleep syz-execprog 46044 224114 93579 0 3 0x1e000082 wait syz-execprog 46044 439710 93579 0 3 0x1e000082 thrsleep syz-execprog 46044 510466 93579 0 3 0x1e000082 kqread syz-execprog 46044 396890 93579 0 3 0x1e000082 thrsleep syz-execprog 93579 133770 9956 0 3 0x810008a sigsusp ksh 9956 310397 77341 0 3 0x1800009a kqread sshd 73646 199519 1 0 3 0x18100083 ttyin getty 77341 78334 1 0 3 0x18000088 kqread sshd 46392 70894 33921 73 3 0x19100090 kqread syslogd 33921 188452 1 0 3 0x18100082 sbwait syslogd 12797 306920 1 0 3 0x18100080 kqread resolvd 9917 253556 52497 77 3 0x18100092 kqread dhcpleased 96880 84875 52497 77 3 0x18100092 kqread dhcpleased 52497 481271 1 0 3 0x18000080 kqread dhcpleased 11261 468793 0 0 3 0x14200 bored smr 2420 138598 0 0 2 0x14200 zerothread 91192 466516 0 0 3 0x14200 aiodoned aiodoned 83471 381592 0 0 3 0x14200 syncer update 97546 311456 0 0 3 0x14200 cleaner cleaner 5529 238499 0 0 7 0x14200 reaper 63078 218998 0 0 3 0x14200 pgdaemon pagedaemon 52600 310649 0 0 3 0x14200 bored viomb 97334 168941 0 0 3 0x40014200 acpi0 acpi0 15851 183592 0 0 3 0x40014200 idle1 69189 371970 0 0 3 0x14200 bored softnet3 58772 119539 0 0 3 0x14200 bored softnet2 69537 437250 0 0 3 0x14200 bored softnet1 15904 450242 0 0 3 0x14200 bored softnet0 23510 176551 0 0 3 0x14200 bored systqmp 6041 220379 0 0 3 0x14200 bored systq 72570 333006 0 0 3 0x14200 tmoslp softclockmp 34411 98678 0 0 3 0x40014200 tmoslp softclock 18045 448988 0 0 3 0x40014200 idle0 1 233913 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex vmsppl r = 0 (0xffffffff82e90330) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 pool_get+0xc4 sys/kern/subr_pool.c:579 #4 uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 #5 vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1245 #6 vm_create+0x13e sys/dev/vmm/vmm.c:388 #7 vmmioctl+0x2de #8 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 #10 sys_ioctl+0x4a9 #11 syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] #11 syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 CPU 1: kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10167 6406K 6419K 166960K 11245 0 pcb 17 12K 12K 166960K 17 0 rtable 234 6K 6K 166960K 347 0 pf 29 8K 10K 166960K 40 0 ifaddr 44 15K 15K 166960K 46 0 ifgroup 50 2K 2K 166960K 50 0 counters 64 36K 36K 166960K 64 0 ioctlops 1 1K 4K 166960K 1795 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1260 79K 79K 166960K 1279 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 12 41K 93K 166960K 447 0 proc 55 78K 115K 166960K 480 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 370 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 865 5161K 5162K 166960K 6766 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 32 64K 100K 166960K 1588 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 2K 166960K 27 0 temp 1 6804K 6868K 166960K 4675 0 kqueue 12 18K 18K 166960K 25 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 33 0 30 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 33 0 20 1 0 1 1 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 29 0 29 1 1 0 1 0 8 0 tcpcb 808 8 0 5 1 0 1 1 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 384 62 0 56 1 0 1 1 0 8 0 nd6 136 24 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 20 0 0 1 0 1 1 0 8 0 pfstkey 128 20 0 0 1 0 1 1 0 8 0 pfstate 376 20 0 0 2 0 2 2 0 8 0 pfrule 1344 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 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2187 0 660 96 0 96 96 0 8 0 ffsino 272 2187 0 660 102 0 102 102 0 8 0 nchpl 144 3077 0 1298 67 0 67 67 0 8 0 uvmvnodes 80 2200 0 0 45 0 45 45 0 8 0 vnodes 216 2200 0 0 123 0 123 123 0 8 0 namei 1024 9707 0 9707 2 0 2 2 0 8 2 percpumem 16 46 0 0 1 0 1 1 0 8 0 vcpupl 3904 313 0 0 40 0 40 40 0 8 0 vmpool 696 314 0 0 29 0 29 29 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 9931 0 9930 3 2 1 2 1 8 0 plimitpl 152 34 0 19 1 0 1 1 0 8 0 sigapl 424 752 0 706 7 0 7 7 0 8 1 futexpl 64 3710 0 3710 1 0 1 1 0 8 1 knotepl 120 102 0 0 4 0 4 4 0 8 0 kqueuepl 216 21 0 13 1 0 1 1 0 8 0 pipepl 320 142 0 114 3 0 3 3 0 8 0 fdescpl 496 734 0 711 6 1 5 5 0 8 1 filepl 152 3536 0 3406 6 0 6 6 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 25 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 711 0 706 1 0 1 1 0 8 0 processpl 1136 752 0 706 4 0 4 4 0 8 0 procpl 656 1083 0 1021 6 0 6 6 0 8 0 sockpl 664 128 0 106 3 0 3 3 0 8 1 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 381 0 0 48 0 48 48 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 397 0 0 25 0 25 25 0 8 0 bufpl 280 4702 0 180 323 0 323 323 0 8 0 anonpl 24 223890 0 218548 57 1 56 56 0 186 22 amapchunkpl 152 19963 0 19426 28 0 28 28 0 158 4 amappl16 200 5697 0 5580 8 0 8 8 0 8 0 amappl15 192 34 0 33 1 0 1 1 0 8 0 amappl14 184 157 0 146 2 0 2 2 0 8 1 amappl13 176 15 0 15 1 1 0 1 0 8 0 amappl12 168 1384 0 1359 2 0 2 2 0 8 0 amappl11 160 71 0 60 1 0 1 1 0 8 0 amappl10 152 44 0 36 1 0 1 1 0 8 0 amappl9 144 351 0 350 1 0 1 1 0 8 0 amappl8 136 133 0 97 2 0 2 2 0 8 0 amappl7 128 47 0 37 1 0 1 1 0 8 0 amappl6 120 354 0 339 2 0 2 2 0 8 0 amappl5 112 183 0 170 1 0 1 1 0 8 0 amappl4 104 559 0 526 2 0 2 2 0 8 0 amappl3 96 3701 0 3644 3 0 3 3 0 8 1 amappl2 88 1129 0 1063 3 0 3 3 0 8 1 amappl1 80 11865 0 11380 22 3 19 22 0 8 8 amappl 88 5906 0 5441 11 0 11 11 0 92 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 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1047 0 711 3 0 3 3 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1047 0 711 3 0 3 3 0 8 0 vmmpekpl 168 9875 0 9833 3 0 3 3 0 8 0 vmmpepl 168 63100 0 61250 115 1 114 115 0 357 25 vmsppl 440 1046 0 711 38 0 38 38 0 8 0 rwobjpl 56 25800 0 22300 50 0 50 50 0 8 0 pdppl 4096 2101 0 1735 391 16 375 375 0 8 9 pvpl 32 45786 0 0 371 1 370 370 0 265 0 pmappl 248 1046 0 711 23 1 22 22 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 704 0 19 20 0 20 20 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff828e8745) at panic+0x17b sys/kern/subr_prf.c:198 witness_checkorder(ffffffff82e31640,9,0) at witness_checkorder+0xd03 witness_debugger sys/kern/subr_witness.c:2524 [inline] witness_checkorder(ffffffff82e31640,9,0) at witness_checkorder+0xd03 sys/kern/subr_witness.c:786 __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82e31438) at __mp_lock+0xa2 sys/kern/kern_lock.c:142 intr_handler(ffff80002a4ace10,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:539 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d mtx_enter_try(ffffffff82e90320) at mtx_enter_try+0x103 mtx_enter(ffffffff82e90320) at mtx_enter+0x4e sys/kern/kern_lock.c:266 pool_get(ffffffff82e90320,9) at pool_get+0xc4 sys/kern/subr_pool.c:579 uvmspace_alloc(0,1000,1,0) at uvmspace_alloc+0x41 sys/uvm/uvm_map.c:3279 vm_impl_init(ffff80002a2a00e0,ffff80002a2dacf8) at vm_impl_init+0x92 sys/arch/amd64/amd64/vmm_machdep.c:1245 vm_create(ffff800000dfac00,ffff80002a2dacf8) at vm_create+0x13e sys/dev/vmm/vmm.c:388 vmmioctl(a00,c2585601,ffff800000dfac00,1,ffff80002a2dacf8) at vmmioctl+0x2de VOP_IOCTL(fffffd806e8f4d88,c2585601,ffff800000dfac00,1,fffffd807f7d3820,ffff80002a2dacf8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806a393390,c2585601,ffff800000dfac00,ffff80002a2dacf8) at vn_ioctl+0xc0 sys/kern/vfs_vnops.c:525 sys_ioctl(ffff80002a2dacf8,ffff80002a4ad5d0,ffff80002a4ad520) at sys_ioctl+0x4a9 syscall(ffff80002a4ad5d0) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a4ad5d0) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2a52a009da0, count: -19 ddb{0}>