Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (tps53679) Fix array access with zero-length block read i2c_smbus_read_block_data() can return 0, indicating a zero-length read. When this happens, tps53679_identify_chip() accesses buf[ret - 1] which is buf[-1], reading one byte before the buffer on the stack. Fix by changing the check from "ret < 0" to "ret <= 0", treating a zero-length read as an error (-EIO), which prevents the out-of-bounds array access. Also fix a typo in the adjacent comment: "if present" instead of duplicate "if".
Product status
75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d (git) before 79b7e588399bb55f4c10bea6ca41b6c3b944d2bb
75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d (git) before 6999b4769e2a61c463158927102e8c07e3f69ba2
75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d (git) before 0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6
6.17
Any version before 6.17
6.18.22 (semver)
6.19.12 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/79b7e588399bb55f4c10bea6ca41b6c3b944d2bb
git.kernel.org/...c/6999b4769e2a61c463158927102e8c07e3f69ba2
git.kernel.org/...c/0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6