login: uvm_fault(0xffffffff83a32b18, 0xffff800027703180, 0, 1) -> d
kernel: page fault trap, code=0
Stopped at      ffs2_balloc+0xa0a:      movq    0(%rcx,%rax,8),%r14
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*324507  74459      0      0x2000  0x4080000    0  syz-executor
ffs2_balloc(fffffd807c56c500,8f0000,4000,fffffd8007ffd270,2,ffff80003c900e58) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614
ffs_write(ffff80003c900ee0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd807ba6ba60,ffff80003c901098,7,fffffd8007ffd270) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
vn_write(fffffd807c701d30,ffff80003c901098,0) at vn_write+0x1c2 sys/kern/vfs_vnops.c:414
dofilewritev(ffff80002d8b1a08,4,ffff80003c901098,0,ffff80003c901140) at dofilewritev+0x2bd sys/kern/sys_generic.c:384
sys_write(ffff80002d8b1a08,ffff80003c9011f0,ffff80003c901140) at sys_write+0xa2 sys/kern/sys_generic.c:300
syscall(ffff80003c9011f0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline]
syscall(ffff80003c9011f0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa7e6d7685a0, count: 7
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