| From | Greg Kroah-Hartman <> | Subject | [PATCH 3.18 33/33] xfs: fix unaligned access in xfs_btree_visit_blocks | Date | Mon, 5 Jun 2017 18:17:26 +0200 |
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3.18-stable review patch. If anyone has any objections, please let me know.
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From: Eric Sandeen <sandeen@sandeen.net>
commit a4d768e702de224cc85e0c8eac9311763403b368 upstream.
This structure copy was throwing unaligned access warnings on sparc64:
Kernel unaligned access at TPC[1043c088] xfs_btree_visit_blocks+0x88/0xe0 [xfs]
xfs_btree_copy_ptrs does a memcpy, which avoids it.
Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- fs/xfs/libxfs/xfs_btree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/xfs/libxfs/xfs_btree.c +++ b/fs/xfs/libxfs/xfs_btree.c @@ -4051,7 +4051,7 @@ xfs_btree_change_owner( xfs_btree_readahead_ptr(cur, ptr, 1); /* save for the next iteration of the loop */ - lptr = *ptr; + xfs_btree_copy_ptrs(cur, &lptr, ptr, 1); } /* for each buffer in the level */
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