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author | Alex Elder <elder@inktank.com> | 2012-10-02 10:25:51 -0500 |
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committer | Alex Elder <elder@inktank.com> | 2012-10-03 10:51:18 -0500 |
commit | 6285bc231277419255f3498d3eb5ddc9f8e7fe79 (patch) | |
tree | cfed533859b1e07896aea7d199716ef4d2704ad4 /Documentation/ABI | |
parent | 457712a0bc5389b75d2c93840a684fd77df2aabb (diff) |
ceph: avoid 32-bit page index overflow
A pgoff_t is defined (by default) to have type (unsigned long). On
architectures such as i686 that's a 32-bit type. The ceph address
space code was attempting to produce 64 bit offsets by shifting a
page's index by PAGE_CACHE_SHIFT, but the result was not what was
desired because the shift occurred before the result got promoted
to 64 bits.
Fix this by converting all uses of page->index used in this way to
use the page_offset() macro, which ensures the 64-bit result has the
intended value.
This fixes http://tracker.newdream.net/issues/3112
Reported-by: Mohamed Pakkeer <pakkeer.mohideen@realimage.com>
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'Documentation/ABI')
0 files changed, 0 insertions, 0 deletions