• Al Viro's avatar
    fix braino in generic_file_read_iter() · 5b47d59a
    Al Viro authored
    Wrong sign of iov_iter_revert() argument.  Unfortunately, slipped through
    the testing, since most of the time we don't do anything to the iterator
    afterwards and potential oops on walking the iter->iov too far backwards
    is too infrequent to be easily triggered.
    
    Add a sanity check in iov_iter_revert() to catch bugs like this one;
    fortunately, the same braino hadn't happened in other callers, but we'd
    better have a warning if such thing crops up.
    Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
    5b47d59a
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