login: panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *501048 82757 0 0 0 0 syz-executor1943 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82464b8f) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82838c20,9,0) at witness_checkorder+0x11eb sys/kern/subr_witness.c:833 __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 intr_handler(ffff80002123ad80,ffff800000255d80) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge20_untramp() at Xintr_ioapic_edge20_untramp+0x18f Xspllower() at Xspllower+0x19 mtx_enter_try(ffffffff829b8d10) at mtx_enter_try+0x100 mtx_enter(ffffffff829b8d10) at mtx_enter+0x4b sys/kern/kern_lock.c:266 pool_get(ffffffff829b8d10,9) at pool_get+0xbf sys/kern/subr_pool.c:581 vm_create(ffff800000b29000,ffff8000211922a8) at vm_create+0x261 sys/arch/amd64/amd64/vmm.c:1526 vmmioctl(a00,c5005601,ffff800000b29000,1,ffff8000211922a8) at vmmioctl+0x1f2 VOP_IOCTL(fffffd806e213830,c5005601,ffff800000b29000,1,fffffd807f7d8840,ffff8000211922a8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e4aca28,c5005601,ffff800000b29000,ffff8000211922a8) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 end trace frame: 0xffff80002123b380, 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+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82464b8f) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82838c20,9,0) at witness_checkorder+0x11eb sys/kern/subr_witness.c:833 __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 intr_handler(ffff80002123ad80,ffff800000255d80) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge20_untramp() at Xintr_ioapic_edge20_untramp+0x18f Xspllower() at Xspllower+0x19 mtx_enter_try(ffffffff829b8d10) at mtx_enter_try+0x100 mtx_enter(ffffffff829b8d10) at mtx_enter+0x4b sys/kern/kern_lock.c:266 pool_get(ffffffff829b8d10,9) at pool_get+0xbf sys/kern/subr_pool.c:581 vm_create(ffff800000b29000,ffff8000211922a8) at vm_create+0x261 sys/arch/amd64/amd64/vmm.c:1526 vmmioctl(a00,c5005601,ffff800000b29000,1,ffff8000211922a8) at vmmioctl+0x1f2 VOP_IOCTL(fffffd806e213830,c5005601,ffff800000b29000,1,fffffd807f7d8840,ffff8000211922a8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e4aca28,c5005601,ffff800000b29000,ffff8000211922a8) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000211922a8,ffff80002123b398,ffff80002123b3e0) at sys_ioctl+0x4a2 syscall(ffff80002123b460) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002123b460) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff2370, count: -17 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002123ab70 rbx 0xffffffff8280abff cpu_info_full_primary+0x2bff rdx 0x8b rcx 0x2 rax 0x68 r8 0xffffffff81a0be34 kprintf+0x144 r9 0x1 r10 0xa59aaaf8bd8325af r11 0x34f19efd222e11b2 r12 0xffffffff8280aa00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81e3e908 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002123ab60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor1943) pid=501048 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff67f0,0xffffffff82913618 process=0xffff80002120a190 user=0xffff800021236000, vmspace=0xfffffd806d447e60 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *82757 501048 53985 0 7 0 syz-executor1943 30680 115859 67703 0 3 0x80 nanoslp syz-executor1943 53985 391055 67703 0 3 0x80 nanoslp syz-executor1943 67703 374285 93982 0 3 0x82 nanoslp syz-executor1943 93982 14454 77391 0 3 0x10008a sigsusp ksh 77391 318935 42469 0 3 0x9a select sshd 99726 304687 1 0 3 0x100083 ttyin getty 42469 361517 1 0 3 0x88 select sshd 24816 278467 84592 74 3 0x100092 bpf pflogd 84592 444822 1 0 3 0x80 netio pflogd 5805 40948 78667 73 3 0x100090 kqread syslogd 78667 501351 1 0 3 0x100082 netio syslogd 89323 522629 1 0 3 0x100080 kqread resolvd 18952 354680 72489 77 3 0x100092 kqread dhcpleased 86706 111807 72489 77 3 0x100092 kqread dhcpleased 72489 371956 1 0 3 0x80 kqread dhcpleased 69676 167235 0 0 3 0x14200 bored smr 71596 74860 0 0 3 0x14200 pgzero zerothread 14994 229278 0 0 3 0x14200 aiodoned aiodoned 75730 241255 0 0 3 0x14200 syncer update 92449 341165 0 0 3 0x14200 cleaner cleaner 87661 393417 0 0 3 0x14200 reaper reaper 55274 57132 0 0 3 0x14200 pgdaemon pagedaemon 19669 491297 0 0 3 0x14200 bored crynlk 68016 350999 0 0 3 0x14200 bored crypto 58646 288913 0 0 3 0x14200 bored viomb 76454 376116 0 0 3 0x40014200 acpi0 acpi0 83532 225964 0 0 7 0x40014200 idle1 77325 418219 0 0 3 0x14200 bored softnet 89444 244436 0 0 3 0x14200 bored systqmp 77467 37670 0 0 3 0x14200 bored systq 41342 371787 0 0 3 0x40014200 bored softclock 67285 325111 0 0 3 0x40014200 idle0 1 94723 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex vcpupl r = 0 (0xffffffff829b8d20) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:581 #4 vm_create+0x261 sys/arch/amd64/amd64/vmm.c:1526 #5 vmmioctl+0x1f2 #6 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 #7 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #8 sys_ioctl+0x4a2 #9 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #10 Xsyscall+0x128 Process 82757 (syz-executor1943) thread 0xffff8000211922a8 (501048) exclusive rwlock vmlistlock r = 0 (0xffff800000655c78) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 vm_create+0x12e vm_impl_init sys/arch/amd64/amd64/vmm.c:1688 [inline] #1 vm_create+0x12e sys/arch/amd64/amd64/vmm.c:1510 #2 vmmioctl+0x1f2 #3 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 #4 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #5 sys_ioctl+0x4a2 #6 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #7 Xsyscall+0x128 exclusive mutex vcpupl r = 0 (0xffffffff829b8d20) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:581 #4 vm_create+0x261 sys/arch/amd64/amd64/vmm.c:1526 #5 vmmioctl+0x1f2 #6 VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 #7 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #8 sys_ioctl+0x4a2 #9 syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10111 6416K 6417K 78643K 11201 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 112 0 ifaddr 29 8K 8K 78643K 30 0 counters 40 33K 33K 78643K 40 0 ioctlops 1 2K 4K 78643K 1545 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 6 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 1 0K 0K 78643K 1 0 proc 67 87K 87K 78643K 278 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 348 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 293 1096K 1096K 78643K 2017 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 4 0 temp 23 4193K 4257K 78643K 2092 0 kqueue 9 12K 12K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 35 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 32 0 26 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 9 0 7 2 1 1 1 0 8 0 pfstkey 112 9 0 7 2 1 1 1 0 8 0 pfstate 320 9 0 7 2 1 1 1 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1481 0 87 88 0 88 88 0 8 0 ffsino 272 1481 0 87 93 0 93 93 0 8 0 nchpl 144 1722 0 170 58 0 58 58 0 8 0 uvmvnodes 72 1491 0 0 28 0 28 28 0 8 0 vnodes 224 1491 0 0 88 0 88 88 0 8 0 namei 1024 4478 0 4478 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 vcpupl 2048 65 0 0 9 0 9 9 0 8 0 vmpool 560 66 0 0 5 0 5 5 0 8 0 scxspl 216 4103 0 4103 22 21 1 8 0 8 1 plimitpl 152 18 0 9 1 0 1 1 0 8 0 sigapl 424 323 0 289 4 0 4 4 0 8 0 knotepl 112 23 0 0 1 0 1 1 0 8 0 kqueuepl 216 5 0 0 1 0 1 1 0 8 0 pipepl 336 69 0 66 2 1 1 1 0 8 0 fdescpl 496 307 0 289 3 0 3 3 0 8 0 filepl 152 1214 0 1155 3 0 3 3 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 20 0 9 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 69 0 57 1 0 1 1 0 8 0 zombiepl 144 289 0 288 2 1 1 1 0 8 0 processpl 1072 323 0 288 3 0 3 3 0 8 0 procpl 672 323 0 288 3 0 3 3 0 8 0 sockpl 480 84 0 60 5 1 4 4 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 82 0 0 10 0 10 10 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 143 0 0 8 0 8 8 0 8 0 bufpl 280 2083 0 93 143 0 143 143 0 8 0 anonpl 24 33442 0 30916 19 3 16 17 0 186 0 amapchunkpl 152 3135 0 2973 9 2 7 8 0 158 0 amappl16 200 163 0 92 4 0 4 4 0 8 0 amappl13 176 18 0 17 2 1 1 1 0 8 0 amappl12 168 12 0 12 2 1 1 1 0 8 1 amappl11 160 42 0 28 1 0 1 1 0 8 0 amappl10 152 23 0 19 1 0 1 1 0 8 0 amappl9 144 224 0 222 1 0 1 1 0 8 0 amappl8 136 274 0 274 2 1 1 1 0 8 1 amappl7 128 52 0 45 1 0 1 1 0 8 0 amappl6 120 88 0 83 1 0 1 1 0 8 0 amappl5 112 176 0 157 1 0 1 1 0 8 0 amappl4 104 528 0 509 1 0 1 1 0 8 0 amappl3 96 112 0 109 1 0 1 1 0 8 0 amappl2 88 400 0 355 3 1 2 2 0 8 0 amappl1 80 7911 0 7522 11 2 9 9 0 8 0 amappl 88 1634 0 1493 4 0 4 4 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 373 0 289 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 373 0 289 1 0 1 1 0 8 0 vmmpekpl 168 6172 0 6155 1 0 1 1 0 8 0 vmmpepl 168 24865 0 23800 51 4 47 47 0 357 0 vmsppl 368 372 0 289 8 0 8 8 0 8 0 rwobjpl 56 7132 0 6440 12 2 10 10 0 8 0 pdppl 4096 754 0 644 129 18 111 111 0 8 1 pvpl 32 115045 0 110502 44 6 38 38 0 265 1 pmappl 224 372 0 289 5 0 5 5 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 368 0 23 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82464b8f) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82838c20,9,0) at witness_checkorder+0x11eb sys/kern/subr_witness.c:833 __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82838a18) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 intr_handler(ffff80002123ad80,ffff800000255d80) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge20_untramp() at Xintr_ioapic_edge20_untramp+0x18f Xspllower() at Xspllower+0x19 mtx_enter_try(ffffffff829b8d10) at mtx_enter_try+0x100 mtx_enter(ffffffff829b8d10) at mtx_enter+0x4b sys/kern/kern_lock.c:266 pool_get(ffffffff829b8d10,9) at pool_get+0xbf sys/kern/subr_pool.c:581 vm_create(ffff800000b29000,ffff8000211922a8) at vm_create+0x261 sys/arch/amd64/amd64/vmm.c:1526 vmmioctl(a00,c5005601,ffff800000b29000,1,ffff8000211922a8) at vmmioctl+0x1f2 VOP_IOCTL(fffffd806e213830,c5005601,ffff800000b29000,1,fffffd807f7d8840,ffff8000211922a8) at VOP_IOCTL+0x9a sys/kern/vfs_vops.c:295 vn_ioctl(fffffd806e4aca28,c5005601,ffff800000b29000,ffff8000211922a8) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000211922a8,ffff80002123b398,ffff80002123b3e0) at sys_ioctl+0x4a2 syscall(ffff80002123b460) at syscall+0x5a9 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002123b460) at syscall+0x5a9 sys/arch/amd64/amd64/trap.c:587 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff2370, count: -17 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x2eb sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5