[ 166.8042180] panic: kernel diagnostic assertion "dev->dv_detaching == curlwp" failed: file "/syzkaller/managers/ci2-netbsd-kubsan/kernel/sys/kern/subr_autoconf.c", line 2176 
[ 166.8276728] cpu0: Begin traceback...
[ 166.8442026] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 166.9142010] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 166.9742004] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 167.0241993] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 167.0642011] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 167.1142002] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 167.1641992] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 167.2141990] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 167.2641990] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 167.3141982] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 167.3642000] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 167.3642000] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 167.4141974] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 167.4641984] fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
[ 167.5141972] exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
[ 167.5641963] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 167.6141963] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 167.6141963] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 167.6141963] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 167.6241966] --- syscall (number 1) ---
[ 167.6441963] netbsd:syscall+0x2da:
[ 167.6441963] cpu0: End traceback...
[ 167.6441963] fatal breakpoint trap in supervisor mode
[ 167.6559679] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x7ed7e2ae20fe ilevel 0 rsp 0xffffb480cc892980
[ 167.6671493] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
[ 167.6748597] Skipping crash dump on recursive panic
[ 167.6748597] 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'

[ 167.6748597] cpu0: Begin traceback...
[ 167.6748597] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 167.6748597] Report() at netbsd:Report+0x3b sys/../common/lib/libc/misc/ubsan.c:1352
[ 167.6748597] HandleTypeMismatch() at netbsd:HandleTypeMismatch+0x1fb sys/../common/lib/libc/misc/ubsan.c:429
[ 167.6748597] genfb_enable_polling() at netbsd:genfb_enable_polling+0x17e sys/dev/wsfb/genfb.c:988
[ 167.6748597] x86_genfb_ddb_trap_callback() at netbsd:x86_genfb_ddb_trap_callback+0x39 sys/arch/x86/x86/genfb_machdep.c:97
[ 167.6748597] db_trap() at netbsd:db_trap+0x68 sys/ddb/db_trap.c:73
[ 167.6748597] kdb_trap() at netbsd:kdb_trap+0x1aa sys/arch/amd64/amd64/db_interface.c:251
[ 167.6748597] trap() at netbsd:trap+0x5b2 sys/arch/amd64/amd64/trap.c:315
[ 167.6748597] --- trap (number 1) ---
[ 167.6748597] breakpoint() at netbsd:breakpoint+0x5
[ 167.6748597] db_panic() at netbsd:db_panic+0xec sys/ddb/db_panic.c:69
[ 167.6748597] vpanic() at netbsd:vpanic+0x2f2 sys/kern/subr_prf.c:293
[ 167.6748597] kern_assert() at netbsd:kern_assert+0x65 sys/arch/amd64/amd64/db_disasm.c:1074
[ 167.6748597] config_detach_commit() at netbsd:config_detach_commit+0xcb sys/kern/subr_autoconf.c:2176
[ 167.6748597] cdev_detached() at netbsd:cdev_detached+0x15d sys/kern/subr_devsw.c:1384
[ 167.6748597] vdevgone() at netbsd:vdevgone+0x125 sys/kern/vfs_subr.c:524
[ 167.6748597] audiodetach() at netbsd:audiodetach+0xb8 sys/dev/audio/audio.c:1371
[ 167.6748597] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 167.6748597] config_detach_children() at netbsd:config_detach_children+0x83 sys/kern/subr_autoconf.c:2195
[ 167.6748597] pad_detach() at netbsd:pad_detach+0x87 sys/dev/pad/pad.c:251
[ 167.6748597] config_detach() at netbsd:config_detach+0x495 sys/kern/subr_autoconf.c:2037
[ 167.6748597] fops_pad_close() at netbsd:fops_pad_close+0xb7 pad_close sys/dev/pad/pad.c:423 [inline]
[ 167.6748597] fops_pad_close() at netbsd:fops_pad_close+0xb7 sys/dev/pad/pad.c:433
[ 167.6748597] closef() at netbsd:closef+0x1cd sys/kern/kern_descrip.c:832
[ 167.6748597] fd_free() at netbsd:fd_free+0x4dc sys/kern/kern_descrip.c:1571
[ 167.6748597] exit1() at netbsd:exit1+0x3a7 sys/kern/kern_exit.c:301
[ 167.6748597] sys_exit() at netbsd:sys_exit+0xd4 sys/kern/kern_exit.c:180
[ 167.6748597] syscall() at netbsd:syscall+0x2da sy_call sys/sys/syscallvar.h:65 [inline]
[ 167.6748597] syscall() at netbsd:syscall+0x2da sy_invoke sys/sys/syscallvar.h:94 [inline]
[ 167.6748597] syscall() at netbsd:syscall+0x2da sys/arch/x86/x86/syscall.c:138
[ 167.6748597] --- syscall (number 1) ---
[ 167.6748597] netbsd:syscall+0x2da:
[ 167.6748597] cpu0: End traceback...
[ 167.6748597] fatal breakpoint trap in supervisor mode
[ 167.6748597] trap type 1 code 0 rip 0xffffffff80221ab5 cs 0x8 rflags 0x246 cr2 0x7ed7e2ae20fe ilevel 0x8 rsp 0xffffb480cc892050
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
[ 167.6748597] uvm_fault(0xffff90e466f1c1c0, 0x0, 1) -> e
[ 167.6748597] fatal page fault in supervisor mode
[ 167.6748597] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb480cc891c80
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
kernel: page fault trap, code=0
[ 167.6748597] uvm_fault(0xffff90e466f1c1c0, 0x0, 1) -> e
[ 167.6748597] fatal page fault in supervisor mode
[ 167.6748597] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb480cc8918b0
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
kernel: page fault trap, code=0
[ 167.6748597] uvm_fault(0xffff90e466f1c1c0, 0x0, 1) -> e
[ 167.6748597] fatal page fault in supervisor mode
[ 167.6748597] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb480cc8914e0
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
kernel: page fault trap, code=0
[ 167.6748597] uvm_fault(0xffff90e466f1c1c0, 0x0, 1) -> e
[ 167.6748597] fatal page fault in supervisor mode
[ 167.6748597] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb480cc891110
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
kernel: page fault trap, code=0
[ 167.6748597] uvm_fault(0xffff90e466f1c1c0, 0x0, 1) -> e
[ 167.6748597] fatal page fault in supervisor mode
[ 167.6748597] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb480cc890d40
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
kernel: page fault trap, code=0
[ 167.6748597] uvm_fault(0xffff90e466f1c1c0, 0x0, 1) -> e
[ 167.6748597] fatal page fault in supervisor mode
[ 167.6748597] trap type 6 code 0 rip 0xffffffff830b6b5b cs 0x8 rflags 0x10217 cr2 0x1e8 ilevel 0x8 rsp 0xffffb480cc890970
[ 167.6748597] curlwp 0xffff90e4697f3700 pid 9900.5854 lowest kstack 0xffffb480cc88e2c0
kernel: page fault trap, code=0