From 470a271627e8c4e2b5357fd0f5759cf6e33cc145 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Mon, 11 Nov 2024 08:09:55 -0700 Subject: [PATCH] Input: ads7846 - increase xfer array size in 'struct ser_req' Clang warns (or errors with CONFIG_WERROR=y, trimmed for brevity): drivers/input/touchscreen/ads7846.c:412:2: error: array index 6 is past the end of the array (that has type 'struct spi_transfer[6]') [-Werror,-Warray-bounds] 412 | req->xfer[6].tx_buf = &req->scratch; | ^ ~ ... drivers/input/touchscreen/ads7846.c:416:2: error: array index 7 is past the end of the array (that has type 'struct spi_transfer[6]') [-Werror,-Warray-bounds] 416 | req->xfer[7].rx_buf = &req->scratch; | ^ ~ drivers/input/touchscreen/ads7846.c:334:2: note: array 'xfer' declared here 334 | struct spi_transfer xfer[6]; | ^ Increase the size of xfer in 'struct ser_req' to ensure that there is enough space for all necessary members and there are no out of bounds accesses, clearing up the warning. Fixes: 781a07da9bb9 ("Input: ads7846 - add dummy command register clearing cycle") Signed-off-by: Nathan Chancellor Reviewed-by: Marek Vasut Link: https://lore.kernel.org/r/20241111-input-ads7846-increase-xfer-array-size-v1-1-06cd92e9f20f@kernel.org Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/ads7846.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index f7bc0a3e56d8..7b3711a3597c 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -331,7 +331,7 @@ struct ser_req { u8 ref_off; u16 scratch; struct spi_message msg; - struct spi_transfer xfer[6]; + struct spi_transfer xfer[8]; /* * DMA (thus cache coherency maintenance) requires the * transfer buffers to live in their own cache lines. -- 2.50.1