iov_iter: fix page_copy_sane for compound pages
Issue is that if the data crosses a page boundary inside a compound page, this check will incorrectly trigger a WARN_ON. To fix this, compute the order using the head of the compound page and adjust the offset to be relative to that head. Fixes: 72e809ed ("iov_iter: sanity checks for copy to/from page primitives") Signed-off-by:Petar Penkov <ppenkov@google.com> CC: Al Viro <viro@zeniv.linux.org.uk> CC: Eric Dumazet <edumazet@google.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
parent
2bd6bf03
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