netfs: release readahead folios on iterator preparation failure

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In the Linux kernel, the following vulnerability has been resolved: netfs: release readahead folios on iterator preparation failure netfs_prepare_read_iterator() batches readahead folios in put_batch so that the folio references can be dropped after the I/O iterator has been prepared. If rolling_buffer_load_from_ra() fails after earlier folios have been batched, the function returns immediately and leaves those references held. Release the batch before returning the error.

Source published

4 Sep 2026 17:11:12 UTC

Source modified

21 Oct 2026 12:47:12 UTC

Observed here

23 Oct 2026 15:48:27 UTC

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