net: tulip: Annotate struct mediatable with __counted_by

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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 mediatable.

[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci

Cc: Shaokun Zhang <[email protected]>
Signed-off-by: Kees Cook <[email protected]>
Reviewed-by: Gustavo A. R. Silva <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

This commit is contained in:

Kees Cook

2023-10-02 11:24:55 -07:00

committed by

Jakub Kicinski

parent 16ae53d80c

commit 0d01cfe5aa

1 changed files with 1 additions and 1 deletions

									
										drivers/net/ethernet/dec/tulip/tulip.h
									
		+1
		-1
	
												View File
												
				@@ -381,7 +381,7 @@ struct mediatable {

					unsigned has_reset:6;

					u32 csr15dir;

					u32 csr15val;		/* 21143 NWay setting. */

					struct medialeaf mleaf[];

					struct medialeaf mleaf[] __counted_by(leafcount);

				};