[ 172.8541369] panic: kernel diagnostic assertion "dev->dv_detaching == curlwp" failed: file "/syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c", line 2176 
[ 172.8741247] cpu1: Begin traceback...
[ 172.8941289] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 172.9641308] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 173.0241262] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 173.0741276] cdev_detached() at netbsd:cdev_detached+0x188 sys/kern/subr_devsw.c:1383
[ 173.1241305] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 173.1741280] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 173.2241255] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 173.2741266] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 173.3241271] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 173.3841276] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 173.4341291] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 173.4341291] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 173.4841296] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 173.5341259] fd_free() at netbsd:fd_free+0x502 sys/kern/kern_descrip.c:1571
[ 173.5841252] exit1() at netbsd:exit1+0x3ab sys/kern/kern_exit.c:301
[ 173.6341272] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 173.6841271] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 173.6841271] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 173.6841271] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 173.6941312] --- syscall (number 1) ---
[ 173.7141271] netbsd:syscall+0x2da:
[ 173.7141271] cpu1: End traceback...
[ 173.7141271] fatal breakpoint trap in supervisor mode
[ 173.7241276] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x7f7fd0a2e000 ilevel 0 rsp 0xffffc080ca791970
[ 173.7341278] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
[ 173.7441271] Skipping crash dump on recursive panic
[ 173.7441271] 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'

[ 173.7441271] cpu1: Begin traceback...
[ 173.7441271] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 173.7441271] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 173.7441271] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
[ 173.7441271] genfb_enable_polling() at netbsd:genfb_enable_polling+0x17e sys/dev/wsfb/genfb.c:988
[ 173.7441271] x86_genfb_ddb_trap_callback() at netbsd:x86_genfb_ddb_trap_callback+0x39 sys/arch/x86/x86/genfb_machdep.c:97
[ 173.7441271] db_trap() at netbsd:db_trap+0x68 sys/ddb/db_trap.c:73
[ 173.7441271] kdb_trap() at netbsd:kdb_trap+0x1aa sys/arch/amd64/amd64/db_interface.c:251
[ 173.7441271] trap() at netbsd:trap+0x5b2 sys/arch/amd64/amd64/trap.c:315
[ 173.7441271] --- trap (number 1) ---
[ 173.7441271] breakpoint() at netbsd:breakpoint+0x5
[ 173.7441271] db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:69
[ 173.7441271] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 173.7441271] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 173.7441271] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 173.7441271] cdev_detached() at netbsd:cdev_detached+0x188 sys/kern/subr_devsw.c:1383
[ 173.7441271] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 173.7441271] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 173.7441271] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 173.7441271] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 173.7441271] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 173.7441271] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 173.7441271] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 173.7441271] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 173.7441271] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 173.7441271] fd_free() at netbsd:fd_free+0x502 sys/kern/kern_descrip.c:1571
[ 173.7441271] exit1() at netbsd:exit1+0x3ab sys/kern/kern_exit.c:301
[ 173.7441271] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 173.7441271] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 173.7441271] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 173.7441271] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 173.7441271] --- syscall (number 1) ---
[ 173.7441271] netbsd:syscall+0x2da:
[ 173.7441271] cpu1: End traceback...
[ 173.7441271] fatal breakpoint trap in supervisor mode
[ 173.7441271] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x7f7fd0a2e000 ilevel 0x8 rsp 0xffffc080ca791040
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
[ 173.7441271] uvm_fault(0xffffb4593c4ede08, 0x0, 1) -> e
[ 173.7441271] fatal page fault in supervisor mode
[ 173.7441271] trap type 6 code 0 rip 0xffffffff830d190b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffc080ca790c70
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
kernel: page fault trap, code=0
[ 173.7441271] uvm_fault(0xffffb4593c4ede08, 0x0, 1) -> e
[ 173.7441271] fatal page fault in supervisor mode
[ 173.7441271] trap type 6 code 0 rip 0xffffffff830d190b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffc080ca7908a0
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
kernel: page fault trap, code=0
[ 173.7441271] uvm_fault(0xffffb4593c4ede08, 0x0, 1) -> e
[ 173.7441271] fatal page fault in supervisor mode
[ 173.7441271] trap type 6 code 0 rip 0xffffffff830d190b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffc080ca7904d0
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
kernel: page fault trap, code=0
[ 173.7441271] uvm_fault(0xffffb4593c4ede08, 0x0, 1) -> e
[ 173.7441271] fatal page fault in supervisor mode
[ 173.7441271] trap type 6 code 0 rip 0xffffffff830d190b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffc080ca790100
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
kernel: page fault trap, code=0
[ 173.7441271] uvm_fault(0xffffb4593c4ede08, 0x0, 1) -> e
[ 173.7441271] fatal page fault in supervisor mode
[ 173.7441271] trap type 6 code 0 rip 0xffffffff830d190b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffc080ca78fd30
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
kernel: page fault trap, code=0
[ 173.7441271] uvm_fault(0xffffb4593c4ede08, 0x0, 1) -> e
[ 173.7441271] fatal page fault in supervisor mode
[ 173.7441271] trap type 6 code 0 rip 0xffffffff830d190b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffc080ca78f960
[ 173.7441271] curlwp 0xffffb4594b470640 pid 1951.1941 lowest kstack 0xffffc080ca78d2c0
kernel: page fault trap, code=0