[ 268.0401680] panic: kernel diagnostic assertion "dev->dv_detaching == curlwp" failed: file "/syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c", line 2176 
[ 268.0501567] cpu1: Begin traceback...
[ 268.0701611] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 268.1401613] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 268.2001596] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 268.2501593] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 268.3001602] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 268.3501629] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 268.4001591] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 268.4501615] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 268.5001615] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 268.5501603] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 268.6001593] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 268.6001593] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 268.6501591] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 268.7001610] fd_close() at netbsd:fd_close+0x461 sys/kern/kern_descrip.c:715
[ 268.7501641] fd_dup2() at netbsd:fd_dup2+0x1b1 sys/kern/kern_descrip.c:780
[ 268.8001607] dodup() at netbsd:dodup+0x1ee sys/kern/sys_descrip.c:144
[ 268.8501583] sys___syscall() at netbsd:sys___syscall+0x1e4 sy_call sys/sys/syscallvar.h:65 [inline]
[ 268.8501583] sys___syscall() at netbsd:sys___syscall+0x1e4 sys/kern/sys_syscall.c:90
[ 268.9001586] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 268.9001586] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 268.9001586] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 268.9101587] --- syscall (number 90 via SYS_syscall) ---
[ 268.9301598] netbsd:syscall+0x2da:
[ 268.9301598] cpu1: End traceback...
[ 268.9301598] fatal breakpoint trap in supervisor mode
[ 268.9401590] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x75baa3b68ff8 ilevel 0 rsp 0xffffd080d15e5980
[ 268.9501561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
[ 268.9601561] Skipping crash dump on recursive panic
[ 268.9601561] 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'

[ 268.9601561] cpu1: Begin traceback...
[ 268.9601561] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 268.9601561] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 268.9601561] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
[ 268.9601561] genfb_enable_polling() at netbsd:genfb_enable_polling+0x17e sys/dev/wsfb/genfb.c:988
[ 268.9601561] x86_genfb_ddb_trap_callback() at netbsd:x86_genfb_ddb_trap_callback+0x39 sys/arch/x86/x86/genfb_machdep.c:97
[ 268.9601561] db_trap() at netbsd:db_trap+0x68 sys/ddb/db_trap.c:73
[ 268.9601561] kdb_trap() at netbsd:kdb_trap+0x1aa sys/arch/amd64/amd64/db_interface.c:251
[ 268.9601561] trap() at netbsd:trap+0x5b2 sys/arch/amd64/amd64/trap.c:315
[ 268.9601561] --- trap (number 1) ---
[ 268.9601561] breakpoint() at netbsd:breakpoint+0x5
[ 268.9601561] db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:69
[ 268.9601561] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 268.9601561] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 268.9601561] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 268.9601561] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 268.9601561] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 268.9601561] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 268.9601561] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 268.9601561] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 268.9601561] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 268.9601561] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 268.9601561] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 268.9601561] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 268.9601561] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 268.9601561] fd_close() at netbsd:fd_close+0x461 sys/kern/kern_descrip.c:715
[ 268.9601561] fd_dup2() at netbsd:fd_dup2+0x1b1 sys/kern/kern_descrip.c:780
[ 268.9601561] dodup() at netbsd:dodup+0x1ee sys/kern/sys_descrip.c:144
[ 268.9601561] sys___syscall() at netbsd:sys___syscall+0x1e4 sy_call sys/sys/syscallvar.h:65 [inline]
[ 268.9601561] sys___syscall() at netbsd:sys___syscall+0x1e4 sys/kern/sys_syscall.c:90
[ 268.9601561] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 268.9601561] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 268.9601561] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 268.9601561] --- syscall (number 90 via SYS_syscall) ---
[ 268.9601561] netbsd:syscall+0x2da:
[ 268.9601561] cpu1: End traceback...
[ 268.9601561] fatal breakpoint trap in supervisor mode
[ 268.9601561] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x75baa3b68ff8 ilevel 0x8 rsp 0xffffd080d15e5050
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
[ 268.9601561] uvm_fault(0xfffff34024677898, 0x0, 1) -> e
[ 268.9601561] fatal page fault in supervisor mode
[ 268.9601561] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffd080d15e4c80
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
kernel: page fault trap, code=0
[ 268.9601561] uvm_fault(0xfffff34024677898, 0x0, 1) -> e
[ 268.9601561] fatal page fault in supervisor mode
[ 268.9601561] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffd080d15e48b0
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
kernel: page fault trap, code=0
[ 268.9601561] uvm_fault(0xfffff34024677898, 0x0, 1) -> e
[ 268.9601561] fatal page fault in supervisor mode
[ 268.9601561] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffd080d15e44e0
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
kernel: page fault trap, code=0
[ 268.9601561] uvm_fault(0xfffff34024677898, 0x0, 1) -> e
[ 268.9601561] fatal page fault in supervisor mode
[ 268.9601561] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffd080d15e4110
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
kernel: page fault trap, code=0
[ 268.9601561] uvm_fault(0xfffff34024677898, 0x0, 1) -> e
[ 268.9601561] fatal page fault in supervisor mode
[ 268.9601561] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffd080d15e3d40
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
kernel: page fault trap, code=0
[ 268.9601561] uvm_fault(0xfffff34024677898, 0x0, 1) -> e
[ 268.9601561] fatal page fault in supervisor mode
[ 268.9601561] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffd080d15e3970
[ 268.9601561] curlwp 0xfffff3402f0ff600 pid 1535.8005 lowest kstack 0xffffd080d15e12c0
kernel: page fault trap, code=0