Description
In the Linux kernel, the following vulnerability has been resolved: clk: samsung: exynos-clkout: Assign .num before accessing .hws Commit f316cdff8d67 ("clk: Annotate struct clk_hw_onecell_data with __counted_by") annotated the hws member of 'struct clk_hw_onecell_data' with __counted_by, which informs the bounds sanitizer (UBSAN_BOUNDS) about the number of elements in .hws[], so that it can warn when .hws[] is accessed out of bounds. As noted in that change, the __counted_by member must be initialized with the number of elements before the first array access happens, otherwise there will be a warning from each access prior to the initialization because the number of elements is zero. This occurs in exynos_clkout_probe() due to .num being assigned after .hws[] has been accessed: UBSAN: array-index-out-of-bounds in drivers/clk/samsung/clk-exynos-clkout.c:178:18 index 0 is out of range for type 'clk_hw *[*]' Move the .num initialization to before the first access of .hws[], clearing up the warning.
Product status
f316cdff8d677db9ad9c90acb44c4cd535b0ee27 (git) before fbf57f5e453dadadb3d29b2d1dbe067e3dc4e236
f316cdff8d677db9ad9c90acb44c4cd535b0ee27 (git) before eb1f3a6ab3efee2b52361879cdc2dc6b11f499c0
f316cdff8d677db9ad9c90acb44c4cd535b0ee27 (git) before a317f63255ebc3dac378c79c5bff4f8d0561c290
f316cdff8d677db9ad9c90acb44c4cd535b0ee27 (git) before cf33f0b7df13685234ccea7be7bfe316b60db4db
6.6
Any version before 6.6
6.6.120 (semver)
6.12.64 (semver)
6.18.4 (semver)
6.19 (original_commit_for_fix)
References
git.kernel.org/...c/fbf57f5e453dadadb3d29b2d1dbe067e3dc4e236
git.kernel.org/...c/eb1f3a6ab3efee2b52361879cdc2dc6b11f499c0
git.kernel.org/...c/a317f63255ebc3dac378c79c5bff4f8d0561c290
git.kernel.org/...c/cf33f0b7df13685234ccea7be7bfe316b60db4db