• Linus Torvalds's avatar
    UPSTREAM: vfs: make AIO use the proper rw_verify_area() area helpers · dc18eac8
    Linus Torvalds authored
    
    
    We had for some reason overlooked the AIO interface, and it didn't use
    the proper rw_verify_area() helper function that checks (for example)
    mandatory locking on the file, and that the size of the access doesn't
    cause us to overflow the provided offset limits etc.
    
    Instead, AIO did just the security_file_permission() thing (that
    rw_verify_area() also does) directly.
    
    This fixes it to do all the proper helper functions, which not only
    means that now mandatory file locking works with AIO too, we can
    actually remove lines of code.
    
    Bug: 28939037
    Reported-by: default avatarManish Honap <manish_honap_vit@yahoo.co.in>
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    (cherry picked from commit a70b52ec1aaeaf60f4739edb1b422827cb6f3893)
    
    Change-Id: I2e182e973b44ba97c45c80d52d8a0b7c32a72750
    dc18eac8
aio.c 47.5 KB