xfs: check for obviously bad level values in the bmbt root

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commit b3bf607d58 upstream.

We can't handle a bmbt that's taller than BTREE_MAXLEVELS, and there's
no such thing as a zero-level bmbt (for that we have extents format),
so if we see this, send back an error code.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Darrick J. Wong 2017-02-02 15:13:59 -08:00 • committed by Greg Kroah-Hartman

parent efab3ae29c

commit 4056a74aaf

1 changed files with 5 additions and 1 deletions

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fs/xfs/libxfs/xfs_inode_fork.c

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