On 9/22/23 11:52, Kees Cook wrote:
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct cpuinfo_tree. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: "David S. Miller" <da...@davemloft.net> Cc: sparcli...@vger.kernel.org Signed-off-by: Kees Cook <keesc...@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavo...@kernel.org> Thanks -- Gustavo
--- arch/sparc/kernel/cpumap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/sparc/kernel/cpumap.c b/arch/sparc/kernel/cpumap.c index f07ea88a83af..8fcf2d8c6bd2 100644 --- a/arch/sparc/kernel/cpumap.c +++ b/arch/sparc/kernel/cpumap.c @@ -50,7 +50,7 @@ struct cpuinfo_tree {/* Offsets into nodes[] for each level of the tree */struct cpuinfo_level level[CPUINFO_LVL_MAX]; - struct cpuinfo_node nodes[]; + struct cpuinfo_node nodes[] __counted_by(total_nodes); };
