btrfs: tree-checker: Check item size before reading file extent type

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In check_extent_data_item(), we read file extent type without verifying
if the item size is valid.

Add such check to ensure the file extent type we read is correct.

The check is not as accurate as we need to cover both inline and regular
extents, so it only checks if the item size is larger or equal to inline
header.
So the existing size checks on inline/regular extents are still needed.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

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Qu Wenruo 2019-09-03 07:46:19 +08:00 • committed by David Sterba

parent 3ec17a67cc

commit 153a6d2999

1 changed files with 11 additions and 0 deletions

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fs/btrfs/tree-checker.c

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