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floppy: ignore kernel-only members in FDRAWCMD ioctl input
Always clear out these floppy_raw_cmd struct members after copying the entire structure from userspace so that the in-kernel version is always valid and never left in an interdeterminate state. Signed-off-by: Matthew Daley <mattd@bugfuzz.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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