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| author | Petar Penkov <ppenkov@google.com> | 2017-08-29 11:20:32 -0700 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-09-20 23:27:48 -0400 |
| commit | a90bcb86ae700c12432446c4aa1819e7b8e172ec (patch) | |
| tree | f172eb5b81e958457422d74e66587bf0071ddebe /lib/iomap_copy.c | |
| parent | 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e (diff) | |
| download | lwn-a90bcb86ae700c12432446c4aa1819e7b8e172ec.tar.gz lwn-a90bcb86ae700c12432446c4aa1819e7b8e172ec.zip | |
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>
Diffstat (limited to 'lib/iomap_copy.c')
0 files changed, 0 insertions, 0 deletions