Messages in this thread Patch in this message | | | From | Kees Cook <> | Subject | [PATCH] audit: Annotate struct audit_chunk with __counted_by | Date | Thu, 17 Aug 2023 13:35:02 -0700 |
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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 audit_chunk.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Paul Moore <paul@paul-moore.com> Cc: Eric Paris <eparis@redhat.com> Cc: audit@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> --- kernel/audit_tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c index e867c17d3f84..85a5b306733b 100644 --- a/kernel/audit_tree.c +++ b/kernel/audit_tree.c @@ -34,7 +34,7 @@ struct audit_chunk { struct list_head list; struct audit_tree *owner; unsigned index; /* index; upper bit indicates 'will prune' */ - } owners[]; + } owners[] __counted_by(count); }; struct audit_tree_mark { -- 2.34.1
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