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authorKees Cook <keescook@chromium.org>2023-09-22 10:52:00 -0700
committerKees Cook <keescook@chromium.org>2023-10-06 13:25:17 -0700
commitcfa36f889f232eb32e15b4ea6a688a5c5a9d19e9 (patch)
tree4f1262f482c9b3a34d4f137068677506f3366b96 /arch/sparc
parentcba58fcbc4ab75d8814ec43db32d4830670526f8 (diff)
sparc: Annotate struct cpuinfo_tree with __counted_by
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" <davem@davemloft.net> Cc: sparclinux@vger.kernel.org Reviewed-by: "Gustavo A. R. Silva" <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230922175159.work.357-kees@kernel.org Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/cpumap.c2
1 files changed, 1 insertions, 1 deletions
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);
};