Description
In the Linux kernel, the following vulnerability has been resolved: x86/fred: Correct speculative safety in fred_extint() array_index_nospec() is no use if the result gets spilled to the stack, as it makes the believed safe-under-speculation value subject to memory predictions. For all practical purposes, this means array_index_nospec() must be used in the expression that accesses the array. As the code currently stands, it's the wrong side of irqentry_enter(), and 'index' is put into %ebp across the function call. Remove the index variable and reposition array_index_nospec(), so it's calculated immediately before the array access.
Product status
14619d912b658ecd9573fb88400d3830a29cadcb (git) before 3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643
14619d912b658ecd9573fb88400d3830a29cadcb (git) before e58f1a9b0677de24dcfee0b21393446ec92ff120
14619d912b658ecd9573fb88400d3830a29cadcb (git) before 92caa5274b99cb6729177232a029ce0dfa6c5f7b
14619d912b658ecd9573fb88400d3830a29cadcb (git) before aa280a08e7d8fae58557acc345b36b3dc329d595
6.9
Any version before 6.9
6.12.77 (semver)
6.18.17 (semver)
6.19.7 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/3bc5887b0a2b06d2d9c22f1f4f8500490b3ae643
git.kernel.org/...c/e58f1a9b0677de24dcfee0b21393446ec92ff120
git.kernel.org/...c/92caa5274b99cb6729177232a029ce0dfa6c5f7b
git.kernel.org/...c/aa280a08e7d8fae58557acc345b36b3dc329d595