fd: always nullify *fdp in fget* routines
Some consumers depend on the pointer being NULL if an error is returned.
The guarantee got broken in r357469.
Reported by: https://syzkaller.appspot.com/bug?extid=0c9b05e2b727aae21eef
Noted by: markj
fd: always nullify *fdp in fget* routines Tags None Referenced Files None Subscribers None
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