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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
9dc55f1389f9569acf9659e58dd836a9c70df217 to < ce20f49ac9194cf81a77f01d1c316d7c17ae753caffected9dc55f1389f9569acf9659e58dd836a9c70df217 to < 275b37a1e5c2c8abd313e8075f6aec9a349f291baffected9dc55f1389f9569acf9659e58dd836a9c70df217 to < b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaacaffected9dc55f1389f9569acf9659e58dd836a9c70df217 to < 82b60ffbb532d919959702768dca04c3c0500ae5affected9dc55f1389f9569acf9659e58dd836a9c70df217 to < 12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3eaffected9dc55f1389f9569acf9659e58dd836a9c70df217 to < 142194fb21afe964d2d194cab1fc357cbf87e899affected9dc55f1389f9569acf9659e58dd836a9c70df217 to < 7aa6bc3e8766990824f66ca76c19596ce10daf3eaffected
Linux Linux
Default version status: affected
4.19affected0 to < 4.19unaffected5.10.267 to ≤ 5.10.*unaffected5.15.218 to ≤ 5.15.*unaffected6.1.185 to ≤ 6.1.*unaffected6.6.120 to ≤ 6.6.*unaffected6.12.64 to ≤ 6.12.*unaffected6.18.3 to ≤ 6.18.*unaffected6.19 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ce20f49ac9194cf81a77f01d1c316d7c17ae753c ↗
- https://git.kernel.org/stable/c/275b37a1e5c2c8abd313e8075f6aec9a349f291b ↗
- https://git.kernel.org/stable/c/b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaac ↗
- https://git.kernel.org/stable/c/82b60ffbb532d919959702768dca04c3c0500ae5 ↗
- https://git.kernel.org/stable/c/12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e ↗
- https://git.kernel.org/stable/c/142194fb21afe964d2d194cab1fc357cbf87e899 ↗
- https://git.kernel.org/stable/c/7aa6bc3e8766990824f66ca76c19596ce10daf3e ↗