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Commit f1c63b73 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Alex Elder
Browse files

xfs: do not do pointer arithmetic on extent records 



We need to call xfs_iext_get_ext for the previous extent to get a
valid pointer, and can't just do pointer arithmetics as they might
be in different pages.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarLachlan McIlroy <lmcilroy@redhat.com>
Signed-off-by: default avatarAlex Elder <aelder@sgi.com>
parent 00239acf

fs/xfs/xfs_bmap.c

+6 −3
Original line number Original line Diff line number Diff line
@@ -5143,9 +5143,12 @@ xfs_bunmapi( 
				 */

				 */

				ASSERT(bno >= del.br_blockcount);

				ASSERT(bno >= del.br_blockcount);

				bno -= del.br_blockcount;

				bno -= del.br_blockcount;

				if (bno < got.br_startoff) {

				if (got.br_startoff > bno) {

					if (--lastx >= 0)

					if (--lastx >= 0) {

						xfs_bmbt_get_all(--ep, &got);

						ep = xfs_iext_get_ext(ifp,

								      lastx);

						xfs_bmbt_get_all(ep, &got);

					}

				}

				}

				continue;

				continue;

			} else if (del.br_state == XFS_EXT_UNWRITTEN) {

			} else if (del.br_state == XFS_EXT_UNWRITTEN) {