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H A D | iov_iter.c | a90bcb86 Tue Aug 29 13:20:32 CDT 2017 Petar Penkov <ppenkov@google.com> 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: 72e809ed81ed ("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> a90bcb86 Tue Aug 29 13:20:32 CDT 2017 Petar Penkov <ppenkov@google.com> 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: 72e809ed81ed ("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>
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