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firmware: exynos-acpm: Count acpm_xfer buffers with __counted_by_ptr

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Use __counted_by_ptr() attribute on the acpm_xfer buffers so UBSAN will
validate runtime that we do not pass over the buffer size, thus making
code safer.

Usage of __counted_by_ptr() (or actually __counted_by()) requires that
counter is initialized before counted array.

Tested-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260219-firmare-acpm-counted-v2-3-e1f7389237d3@oss.qualcomm.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Krzysztof Kozlowski
2026-02-19 12:27:12 +01:00
committed by Krzysztof Kozlowski
parent 00808ae2e6
commit 951b8eee05
2 changed files with 4 additions and 4 deletions
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4
drivers/firmware/samsung/exynos-acpm.h
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@@ -8,8 +8,8 @@
#define __EXYNOS_ACPM_H__
struct acpm_xfer {
const u32 *txd;
u32 *rxd;
const u32 *txd __counted_by_ptr(txcnt);
u32 *rxd __counted_by_ptr(rxcnt);
size_t txcnt;
size_t rxcnt;
unsigned int acpm_chan_id;