Description
In the Linux kernel, the following vulnerability has been resolved: erofs: unify lcn as u64 for 32-bit platforms As sashiko reported [1], `lcn` was typed as `unsigned long` (or `unsigned int` sometimes), which is only 32 bits wide on 32-bit platforms, which causes `(lcn << lclusterbits)` to be truncated at 4 GiB. In order to consolidate the logic, just use `u64` consistently around the codebase. [1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com
Affected products
- Linux / Linux5.3 – 5.3
- Linux / Linux0 – 5.3
- Linux / Linux152a333a589560bee002e4c96761f1b560a5793c – 4fc9b12e43a3f19a01a8fb61f7961be79de20253
- Linux / Linux152a333a589560bee002e4c96761f1b560a5793c – 858e4d98a86adf34584767388deb6c9b217f70c5
- Linux / Linux152a333a589560bee002e4c96761f1b560a5793c – 582b0bf201157632cb5474c885989a6ebda46521
- Linux / Linux152a333a589560bee002e4c96761f1b560a5793c – 2d8c7edcb661812249469f4a5b62e9339118846f
- Linux / Linux6.12.91 – 6.12.*
- Linux / Linux6.18.33 – 6.18.*
- Linux / Linux7.0.10 – 7.0.*
- Linux / Linux7.1 – *
References
- MISChttps://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253
- MISChttps://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5
- MISChttps://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521
- MISChttps://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f