[ 145.8283654] panic: kernel diagnostic assertion "dev->dv_detaching == curlwp" failed: file "/syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c", line 2176 
[ 145.8501247] cpu0: Begin traceback...
[ 145.8683512] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 145.9283520] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 145.9783543] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 146.0283514] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 146.0783504] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 146.1183507] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 146.1683508] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 146.2083506] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 146.2583502] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 146.3083517] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 146.3583497] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 146.3583497] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 146.3983500] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 146.4483520] fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
[ 146.4883516] exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
[ 146.5383504] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 146.5783506] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 146.5783506] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 146.5783506] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 146.5990701] --- syscall (number 1) ---
[ 146.6083510] netbsd:syscall+0x2da:
[ 146.6083510] cpu0: End traceback...
[ 146.6213437] fatal breakpoint trap in supervisor mode
[ 146.6213437] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x63e060 ilevel 0 rsp 0xffffb380d1558980
[ 146.6369214] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
[ 146.6446276] Skipping crash dump on recursive panic
[ 146.6446276] panic: UBSan: Undefined Behavior in /syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/dev/wsfb/genfb.c:988:28, member access within null pointer of type 'struct genfb_private'

[ 146.6446276] cpu0: Begin traceback...
[ 146.6446276] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 146.6446276] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 146.6446276] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
[ 146.6446276] genfb_enable_polling() at netbsd:genfb_enable_polling+0x17e sys/dev/wsfb/genfb.c:988
[ 146.6446276] x86_genfb_ddb_trap_callback() at netbsd:x86_genfb_ddb_trap_callback+0x39 sys/arch/x86/x86/genfb_machdep.c:97
[ 146.6446276] db_trap() at netbsd:db_trap+0x68 sys/ddb/db_trap.c:73
[ 146.6446276] kdb_trap() at netbsd:kdb_trap+0x1aa sys/arch/amd64/amd64/db_interface.c:251
[ 146.6446276] trap() at netbsd:trap+0x5b2 sys/arch/amd64/amd64/trap.c:315
[ 146.6446276] --- trap (number 1) ---
[ 146.6446276] breakpoint() at netbsd:breakpoint+0x5
[ 146.6446276] db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:69
[ 146.6446276] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 146.6446276] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 146.6446276] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 146.6446276] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 146.6446276] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 146.6446276] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 146.6446276] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 146.6446276] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 146.6446276] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 146.6446276] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 146.6446276] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 146.6446276] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 146.6446276] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 146.6446276] fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
[ 146.6446276] exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
[ 146.6446276] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 146.6446276] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 146.6446276] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 146.6446276] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 146.6446276] --- syscall (number 1) ---
[ 146.6446276] netbsd:syscall+0x2da:
[ 146.6446276] cpu0: End traceback...
[ 146.6446276] fatal breakpoint trap in supervisor mode
[ 146.6446276] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x63e060 ilevel 0x8 rsp 0xffffb380d1558050
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
[ 146.6446276] uvm_fault(0xfffff663a3f56058, 0x0, 1) -> e
[ 146.6446276] fatal page fault in supervisor mode
[ 146.6446276] trap type 6 code 0 rip 0xffffffff830c3e7b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb380d1557c80
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
kernel: page fault trap, code=0
[ 146.6446276] uvm_fault(0xfffff663a3f56058, 0x0, 1) -> e
[ 146.6446276] fatal page fault in supervisor mode
[ 146.6446276] trap type 6 code 0 rip 0xffffffff830c3e7b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb380d15578b0
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
kernel: page fault trap, code=0
[ 146.6446276] uvm_fault(0xfffff663a3f56058, 0x0, 1) -> e
[ 146.6446276] fatal page fault in supervisor mode
[ 146.6446276] trap type 6 code 0 rip 0xffffffff830c3e7b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb380d15574e0
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
kernel: page fault trap, code=0
[ 146.6446276] uvm_fault(0xfffff663a3f56058, 0x0, 1) -> e
[ 146.6446276] fatal page fault in supervisor mode
[ 146.6446276] trap type 6 code 0 rip 0xffffffff830c3e7b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb380d1557110
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
kernel: page fault trap, code=0
[ 146.6446276] uvm_fault(0xfffff663a3f56058, 0x0, 1) -> e
[ 146.6446276] fatal page fault in supervisor mode
[ 146.6446276] trap type 6 code 0 rip 0xffffffff830c3e7b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb380d1556d40
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
kernel: page fault trap, code=0
[ 146.6446276] uvm_fault(0xfffff663a3f56058, 0x0, 1) -> e
[ 146.6446276] fatal page fault in supervisor mode
[ 146.6446276] trap type 6 code 0 rip 0xffffffff830c3e7b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb380d1556970
[ 146.6446276] curlwp 0xfffff663b0e76bc0 pid 2196.2196 lowest kstack 0xffffb380d15542c0
kernel: page fault trap, code=0