btrfs: compression: add an ASSERT() to ensure the read-in length is sane

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There are already two bugs (one in zlib, one in zstd) that involved
compression path is not handling sector size < page size cases well.

So it makes more sense to make sure that btrfs_compress_folios() returns

Since we already have two bugs (one in zlib, one in zstd) in the
compression path resulting the @total_in be to larger than the
to-be-compressed range length, there is enough reason to add an ASSERT()
to make sure the total read-in length doesn't exceed the input length.

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

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Qu Wenruo 2024-09-06 14:27:56 +09:30 • committed by David Sterba

parent 90275a7762

commit dd5e276254

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fs/btrfs/compression.c

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