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(parent: a901004) | patch
iomap: Fix overflow in iomap_page_mkwrite
authorAndreas Gruenbacher <agruenba@redhat.com>
Thu, 7 Nov 2019 15:28:18 +0000 (07:28 -0800)
committerDarrick J. Wong <darrick.wong@oracle.com>
Thu, 7 Nov 2019 15:28:18 +0000 (07:28 -0800)
commitadd66fcbd3fbe5aa0dd4dddfa23e119c12989a27
treed9d71271fe45b9a3ba59c9c17bc5534efb149f67tree | snapshot
parenta901004214994f12523b47521cddfa4426f284c1commit | diff
iomap: Fix overflow in iomap_page_mkwrite

On architectures where loff_t is wider than pgoff_t, the expression
((page->index + 1) << PAGE_SHIFT) can overflow.  Rewrite to use the page
offset, which we already compute here anyway.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
fs/iomap/buffered-io.c diff | blob | history
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