From 7578847b5949db3a75163908bd99c46d27e8b19f Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 26 Sep 2022 12:10:37 +0300 Subject: [PATCH] iio: adc: mcp3911: fix sizeof() vs ARRAY_SIZE() bug This code uses sizeof() instead of ARRAY_SIZE() so it reads beyond the end of the mcp3911_osr_table[] array. Fixes: 6d965885f4ea ("iio: adc: mcp3911: add support for oversampling ratio") Signed-off-by: Dan Carpenter Reviewed-by: Marcus Folkesson Link: https://lore.kernel.org/r/YzFsjY3xLHUQMjVr@kili Signed-off-by: Jonathan Cameron --- drivers/iio/adc/mcp3911.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c index b35fd2c9c3c00..015a9ffdb26a2 100644 --- a/drivers/iio/adc/mcp3911.c +++ b/drivers/iio/adc/mcp3911.c @@ -248,7 +248,7 @@ static int mcp3911_write_raw(struct iio_dev *indio_dev, break; case IIO_CHAN_INFO_OVERSAMPLING_RATIO: - for (int i = 0; i < sizeof(mcp3911_osr_table); i++) { + for (int i = 0; i < ARRAY_SIZE(mcp3911_osr_table); i++) { if (val == mcp3911_osr_table[i]) { val = FIELD_PREP(MCP3911_CONFIG_OSR, i); ret = mcp3911_update(adc, MCP3911_REG_CONFIG, MCP3911_CONFIG_OSR, -- 2.30.2