Detections
Analytics
CVE-2025-68794
critical
Description
In the Linux kernel, the following vulnerability has been resolved: iomap: adjust read range correctly for non-block-aligned positions iomap_adjust_read_range() assumes that the position and length passed in are block-aligned. This is not always the case however, as shown in the syzbot generated case for erofs. This causes too many bytes to be skipped for uptodate blocks, which results in returning the incorrect position and length to read in. If all the blocks are uptodate, this underflows length and returns a position beyond the folio. Fix the calculation to also take into account the block offset when calculating how many bytes can be skipped for uptodate blocks.
References
https://git.kernel.org/stable/c/ce20f49ac9194cf81a77f01d1c316d7c17ae753c
https://git.kernel.org/stable/c/b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac
https://git.kernel.org/stable/c/82b60ffbb532d919959702768dca04c3c0500ae5
https://git.kernel.org/stable/c/7aa6bc3e8766990824f66ca76c19596ce10daf3e
https://git.kernel.org/stable/c/275b37a1e5c2c8abd313e8075f6aec9a349f291b
https://git.kernel.org/stable/c/142194fb21afe964d2d194cab1fc357cbf87e899
https://git.kernel.org/stable/c/12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e