[  49.8546334] panic: kernel diagnostic assertion "!fmi->fmi_gone" failed: file "/syzkaller/managers/ci2-netbsd-kmsan/kernel/sys/kern/vfs_trans.c", line 503 
[  49.8646174] cpu1: Begin traceback...
[  49.8846217] vpanic() at netbsd:vpanic+0xc9d
[  49.9346254] kern_assert() at netbsd:kern_assert+0x228
[  49.9846236] _fstrans_start() at netbsd:_fstrans_start+0x793
[  50.0346237] fstrans_start() at netbsd:fstrans_start+0x59 sys/kern/vfs_trans.c:531
[  50.0746221] VOP_LOCK() at netbsd:VOP_LOCK+0x3a9 sys/kern/vnode_if.c:1630
[  50.1246227] vn_lock() at netbsd:vn_lock+0x975
[  50.1646214] vgone() at netbsd:vgone+0x178 sys/kern/vfs_vnode.c:1259
[  50.2146235] ov_unmount() at netbsd:ov_unmount+0x28a sys/miscfs/overlay/overlay_vfsops.c:206
[  50.2546300] VFS_UNMOUNT() at netbsd:VFS_UNMOUNT+0xb0 sys/kern/vfs_subr.c:1419
[  50.3046242] mount_domount() at netbsd:mount_domount+0xd54 sys/kern/vfs_mount.c:853
[  50.3446219] do_sys_mount() at netbsd:do_sys_mount+0xc07 sys/kern/vfs_syscalls.c:616
[  50.3946223] sys___mount50() at netbsd:sys___mount50+0x1bf sys/kern/vfs_syscalls.c:534
[  50.4346249] sys___syscall() at netbsd:sys___syscall+0x2c6 sys/kern/sys_syscall.c:90
[  50.4946243] syscall() at netbsd:syscall+0x60c sy_invoke sys/sys/syscallvar.h:94 [inline]
[  50.4946243] syscall() at netbsd:syscall+0x60c sys/arch/x86/x86/syscall.c:138
[  50.5046261] --- syscall (number 410 via SYS_syscall) ---
[  50.5246207] netbsd:syscall+0x60c:
[  50.5246207] cpu1: End traceback...
[  50.5246207] fatal breakpoint trap in supervisor mode
[  50.5346177] trap type 1 code 0 rip 0xffffffff802228ad cs 0x8 rflags 0x282 cr2 0x7b87a3ea7000 ilevel 0x5 rsp 0xffffc08087bb4430
[  50.5446136] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb3e20
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb3810
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb3200
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb2bf0
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb25e0
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb1fd0
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb19c0
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb13b0
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb0da0
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb0790
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e
[  50.5546170] fatal page fault in supervisor mode
[  50.5546170] trap type 6 code 0 rip 0xffffffff848ab2a7 cs 0x8 rflags 0x10246 cr2 0x1e8 ilevel 0x8 rsp 0xffffc08087bb0180
[  50.5546170] curlwp 0xffffc080137f9480 pid 648.650 lowest kstack 0xffffc08087bad2c0
kernel: page fault trap, code=0
[  50.5546170] uvm_fault(0xffffc08013494700, 0x0, 1) -> e