xfs: fix 32-bit truncation in xfs_compute_rextslog

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commit cf8f0e6c14 upstream.

It's quite reasonable that some customer somewhere will want to
configure a realtime volume with more than 2^32 extents.  If they try to
do this, the highbit32() call will truncate the upper bits of the
xfs_rtbxlen_t and produce the wrong value for rextslog.  This in turn
causes the rsumlevels to be wrong, which results in a realtime summary
file that is the wrong length.  Fix that.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Darrick J. Wong 2024-03-26 17:12:18 -07:00 • committed by Greg Kroah-Hartman

parent 0a31f1e8d8

commit 89e511a745

1 changed files with 5 additions and 3 deletions

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fs/xfs/libxfs/xfs_rtbitmap.c

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