On Mon, Sep 07, 2020 at 11:01:14AM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > There's an overflow bug in the realtime allocator. If the rt volume is > large enough to handle a single allocation request that is larger than > the maximum bmap extent length and the rt bitmap ends exactly on a > bitmap block boundary, it's possible that the near allocator will try to > check the freeness of a range that extends past the end of the bitmap. > This fails with a corruption error and shuts down the fs. > > Therefore, constrain maxlen so that the range scan cannot run off the > end of the rt bitmap. Looks good, Reviewed-by: Christoph Hellwig <hch@xxxxxx>
