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| author | David S. Miller <davem@davemloft.net> | 2017-09-23 20:16:53 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-23 20:16:53 +0300 |
| commit | 1f8d31d189cc6ce1e4b972959fda41e790bb92b8 (patch) | |
| tree | fd3cca12a29319f073773ac55f7d41cc58e2c73f /lib/iov_iter.c | |
| parent | 3fb5ec06578e4c85d3486b6a73cbeb07960a51ce (diff) | |
| parent | cd4175b11685b11c40e31a03e05084cc212b0649 (diff) | |
| download | linux-1f8d31d189cc6ce1e4b972959fda41e790bb92b8.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'lib/iov_iter.c')
| -rw-r--r-- | lib/iov_iter.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 52c8dd6d8e82..1c1c06ddc20a 100644 --- a/lib/iov_iter.c +++ b/lib/iov_iter.c @@ -687,8 +687,10 @@ EXPORT_SYMBOL(_copy_from_iter_full_nocache); static inline bool page_copy_sane(struct page *page, size_t offset, size_t n) { - size_t v = n + offset; - if (likely(n <= v && v <= (PAGE_SIZE << compound_order(page)))) + struct page *head = compound_head(page); + size_t v = n + offset + page_address(page) - page_address(head); + + if (likely(n <= v && v <= (PAGE_SIZE << compound_order(head)))) return true; WARN_ON(1); return false; |