CVE-2024-42242: mmc: sdhci: Fix max_seg_size for 64KiB PAGE_SIZE

First published: Wed Aug 07 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: mmc: sdhci: Fix max_seg_size for 64KiB PAGE_SIZE blk_queue_max_segment_size() ensured: if (max_size < PAGE_SIZE) max_size = PAGE_SIZE; whereas: blk_validate_limits() makes it an error: if (WARN_ON_ONCE(lim->max_segment_size < PAGE_SIZE)) return -EINVAL; The change from one to the other, exposed sdhci which was setting maximum segment size too low in some circumstances. Fix the maximum segment size when it is too low.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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