uvm_fault(0xffffffff83aee2d0, 0xffff8000281c2010, 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
*238440  46139      0           0        0x1    0  syz-executor
ffs2_balloc(fffffd806e9fb600,380f7,50,fffffd8007ffd618,1,ffff80003c90ecf8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614
ffs_write(ffff80003c90ed80) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345
VOP_WRITE(fffffd806d4cf1e8,ffff80003c90ee30,3,fffffd8007ffd618) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245
ktrwriteraw(ffff8000338bc558,fffffd806d4cf1e8,fffffd8007ffd618,ffff80003c90ef00,ffff80003c90eee0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692
ktrsysret(ffff8000338bc558,5b,0,ffff80003c90efc0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline]
ktrsysret(ffff8000338bc558,5b,0,ffff80003c90efc0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209
syscall(ffff80003c90f070) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline]
syscall(ffff80003c90f070) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x73f1bd34e4a0, count: 8
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