xfs: validity check agbnos on the AGFL

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If the agfl or the indexing in the AGF has been corrupted, getting a
block form the AGFL could return an invalid block number. If this
happens, bad things happen. Check the agbno we pull off the AGFL
and return -EFSCORRUPTED if we find somethign bad.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Dave Chinner <david@fromorbit.com>

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Dave Chinner 2023-06-05 14:48:15 +10:00 • committed by Dave Chinner

parent e0a8de7da3

commit 3148ebf2c0

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fs/xfs/libxfs/xfs_alloc.c

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