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mfd: iqs62x: Annotate struct iqs62x_fw_blk 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 iqs62x_fw_blk.

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

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230922175337.work.150-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Kees Cook 2023-09-22 10:53:38 -07:00 committed by Lee Jones
parent 1c7ea43fc4
commit 69c3f91545
1 changed files with 1 additions and 1 deletions
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2
drivers/mfd/iqs62x.c
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@ -96,7 +96,7 @@ struct iqs62x_fw_blk {
u8 addr;
u8 mask;
u8 len;
u8 data[];
u8 data[] __counted_by(len);
};
struct iqs62x_info {