mlx4_core: Fix state check in mlx4_qp_modify()
When checking the states passed in, mlx4_qp_modify() accidentally checks
cur_state twice rather than checking cur_state and new_state. Fix this
to make sure that both values are in-bounds.
Since these values may be passed in from userspace, this bug results in
userspace being able to trigger an oops.
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: stable <stable@kernel.org>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
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