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udf: Annotate struct udf_bitmap 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 udf_bitmap.

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

Cc: Jan Kara <jack@suse.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Message-Id: <20230915201404.never.574-kees@kernel.org>
This commit is contained in:
Kees Cook 2023-09-15 13:14:05 -07:00 committed by Jan Kara
parent d3cc1b0be2
commit d1d3fcb324
1 changed files with 1 additions and 1 deletions
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2
fs/udf/udf_sb.h
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@ -86,7 +86,7 @@ struct udf_virtual_data {
struct udf_bitmap {
__u32 s_extPosition;
int s_nr_groups;
struct buffer_head *s_block_bitmap[];
struct buffer_head *s_block_bitmap[] __counted_by(s_nr_groups);
};
struct udf_part_map {